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Articles de revues sur le sujet « Alloy casting »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 6 septembre 2023

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1

Szymczak, T., G. Gumienny, I. Stasiak, and T. Pacyniak. "Hypoeutectic Al-Si Alloy with Cr, V and Mo to Pressure Die Casting." Archives of Foundry Engineering 17, no. 1 (March 1, 2017): 153–56. http://dx.doi.org/10.1515/afe-2017-0028.

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Abstract This paper presents the results of hypoeutectic 226 grade alloy as well as prepared on its basis Al-Si alloy containing Cr, V and Mo. The additives tested were added as AlCr15, AlV10 and AlMo8 master alloys. Alloys tested were poured into DTA sampler as well as using pressure die casting. An amount of Cr, V and Mo additives in alloy poured into DTA sampler comprised within the range approximately 0.05-0.35%. Alloys to pressure die casting contained 0.05-0.20% Cr, V and Mo. The crystallization process was examined using the derivative thermal analysis (DTA). The microstructure of casti

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Daswa, Pfarelo, Heinrich Moller, and Gonasagren Govender. "Overageing Characteristics of Alloy A356 and Al-Mg-Si Casting Alloys." Solid State Phenomena 285 (January 2019): 75–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.75.

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Al-Si-Mg casting alloys, such as Al-7Si-0.3Mg alloy A356, are heat treatable and can be precipitation hardened to the T6 temper condition. However, Al-Mg-Si casting alloys (5xx series) are generally not considered to be heat treatable. These 5xx series castings are known for good castability and good resistance to corrosion, especially in marine environments. This paper investigates the extent to which 5xx series alloys could possibly be artificially aged. The influences of artificial ageing time on the overageing characteristics of both Al-Mg-Si and A356 casting alloys have been studied. A356

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Vanko, B., and L. Stanček. "Utilization of Heat Treatment Aimed to Spheroidization of Eutectic Silicon for Silumin Castings Produced by Squeeze Casting." Archives of Foundry Engineering 12, no. 1 (January 1, 2012): 111–14. http://dx.doi.org/10.2478/v10266-012-0021-1.

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Utilization of Heat Treatment Aimed to Spheroidization of Eutectic Silicon for Silumin Castings Produced by Squeeze Casting This paper describes the possibility of using very short periods of solution annealing in the heat treatment of unmodified hypoeutectic silumin alloy AlSi7Mg0,3 casted by method of casting with crystallization under pressure with forced convection (direct squeeze casting process). Castings prepared at different casting parameters were subjected to special heat treatment called SST (Silicon Spheroidization Treatment), which were originally used only for the modified silumi

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Eperješi, Š., M. Matvija, ľ. Eperješi, and M. Vojtko. "Evaluation of Cracking Causes of AlSi5Cu3 Alloy Castings." Archives of Metallurgy and Materials 59, no. 3 (October 28, 2014): 1089–92. http://dx.doi.org/10.2478/amm-2014-0187.

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Abstract Recently, the castings made from aluminum-silicon alloys by pressure die casting are increasingly used in the automotive industry. In practice, on these castings are high demands, mainly demands on quality of their structure, operating life and safety ensuring of their utilization. The AlSi5Cu3 alloy castings are widely used for production of car components. After the prescribed tests, the cracks and low mechanical properties have been identified for several castings of this alloy, which were produced by low pressure casting into a metal mould and subsequent they were heat treated. Th

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Nadolski, M., Z. Konopka, M. Łągiewka, and A. Zyska. "The Influence of the Method of Mould Filling on the Quality of Castings Made of EN AC-44000 or EN AC-46200 Alloy." Archives of Foundry Engineering 14, no. 4 (December 1, 2014): 73–76. http://dx.doi.org/10.2478/afe-2014-0089.

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Abstract The performed examinations concerning the process of filling the plaster ceramic moulds with aluminium alloys allowed to assess the influence of various methods of introducing the metal into the mould cavity on the macro- and microstructure of the obtained experimental castings. The comparison was performed for castings with graded wall thickness made either of EN AC-44000 alloy or of EN AC-46000 alloy, produced either by gravity casting, or by gravity casting with negative pressure generated around the mould (according to the Vacumetal technology), or by counter-gravity casting. It w

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Vanko, Branislav, Ladislav Stanček, Michal Čeretka, Eduard Sedláček, and Roman Moravčík. "Properties of EN AW-2024 Wrought Aluminum Alloy after Casting with Crystallization under Pressure." Scientific Proceedings Faculty of Mechanical Engineering 23, no. 1 (December 1, 2015): 58–65. http://dx.doi.org/10.1515/stu-2015-0009.

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Abstract Establishing of wrought aluminum alloys casting to manufacture is now a global trend, for example due to lower production costs compare to forging or due to the ability to produce parts with thinner sections and more complex shapes. The aim of using these alloys in the foundry industry is in particular the creation of castings with higher mechanical properties than achieve castings made of standard casting aluminum alloys. Most often are cast wrought aluminum alloys of the 2xxx, 6xxx and 7xxx series. In the experiment, an alloy EN AW-2024 has been cast by modified technology of castin

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Říhová, M., J. Cech, and J. Havlíčková. "Evaluation of Porosity in Al Alloy Die Castings." Archives of Foundry Engineering 12, no. 1 (January 1, 2012): 93–98. http://dx.doi.org/10.2478/v10266-012-0018-9.

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Evaluation of Porosity in Al Alloy Die Castings Mechanical properties of an Al-alloy die casting depend significantly on its structural properties. Porosity in Al-alloy castings is one of the most frequent causes of waste castings. Gas pores are responsible for impaired mechanical-technological properties of cast materials. On the basis of a complex evaluation of experiments conducted on AlSi9Cu3 alloy samples taken from the upper engine block which was die-cast with and without local squeeze casting it can be said that castings manufactured without squeeze casting exhibit maximum porosity in

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8

Wang, Yingli, and Fengxian Wang. "Key Analysis of Design and Numerical Simulation for Aluminum Alloy Impeller Low-pressure Casting Mold." Journal of Physics: Conference Series 2338, no. 1 (September 1, 2022): 012070. http://dx.doi.org/10.1088/1742-6596/2338/1/012070.

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Abstract It is of great practical value to complete the low-pressure casting of aluminum alloy impeller in the current development of low-pressure casting process. In the research, it is necessary to focus on factory realization and use low-pressure casting to produce aluminum alloy impellers, so that impeller castings with compact structure and meeting performance requirements can be obtained. Compared with other casting methods, low-pressure casting itself, as a precision casting method, can be cast on the metal solution with lower pressure in the application process. The castings can be fil

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9

Guan, Tian Yang, Zhi Feng Zhang, Min He, Yue Long Bai, and Ping Wang. "Effects of Annular Electromagnetic Stirring Melt Treatment on Microstructure and Mechanical Properties of 7050 Rheo-Casting." Solid State Phenomena 285 (January 2019): 219–23. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.219.

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The microstructure and mechanical properties of 7050 alloy rheo-castings after treated by Annular Electromagnetic Stirring (A-EMS) melt treatment were investigated. The results revealed that, under A-EMS, the refinement and homogeneity of the solidification structure could be improved greatly and the slurry was suitable for the following rheo-casting; and also the hot-cracking defects in the casting process were significantly alleviated, meanwhile, the strength and ductility of the alloy casting were found to be comparable to those of conventionally forged 7000 series alloys.

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10

Liu, Yan Gai, Zhao Hui Huang, Hao Ding, Ming Hao Fang, and Shou Mei Xiong. "Study on Pressure Variations in the Mold of Magnesium Alloy Die Castings." Key Engineering Materials 353-358 (September 2007): 1614–16. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.1614.

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High pressure die casting is the most common method in making magnesium alloys for both auto parts and 3C products. Pressure variations in the mold during mold filling and solidification process have direct influences on the quality and properties of die castings. In this paper, a cylinder head cover was produced to experimentally study pressure variations in the mold during magnesium alloy die-casting process in real time for the first time. Pressure varies at different positions in the mold during die casting process. This study indicates that mold filling and solidification process of magne

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11

Wang, Xue Dong, Jian He Lin, Suo Qing Yu, and Li Yong Ni. "Casting Mold Designing for Aluminum Alloy Car Holders." Applied Mechanics and Materials 378 (August 2013): 350–54. http://dx.doi.org/10.4028/www.scientific.net/amm.378.350.

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The structure and processing of car holders castings were analyzed. Die-casting molding process scheme was established. The design of mold includes three core-drawing mechanisms. the gate of the gating system was arranged on the casting bottom surface. For economy and die easy maintenance considerations, die-casting machine, mold, and mold standard parts should be standard parts. The designs of mold gating system and non-standard pieces were completed with the aid of PROE. Proved by actual production, the mold operated smoothly, without clamping stagnation, and the production of die castings m

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Majerič, Dragana, Vojkan Lazić, Peter Majerič, Aleksa Marković, and Rebeka Rudolf. "Investigation of CoCr Dental Alloy: Example from a Casting Workflow Standpoint." Crystals 11, no. 8 (July 22, 2021): 849. http://dx.doi.org/10.3390/cryst11080849.

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Cobalt-chromium (CoCr) alloys have been used in dentistry for dental bridges, crowns and implants for decades. When using CoCr alloys, a number of fractures have occurred in the Dental Laboratory, both when handling the castings and after they have been placed in the patient’s mouth. It is assumed that the key cause of the resulting fractures of CoCr dental bridges is the casting process, which includes the preparation and mixing of the basic components of the CoCr dental alloy, unstable solidification and the final treatment of the tooth casting surface. The aim of this study was, therefore,

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13

Taute, Carlien, and Heinrich Möller. "Segregation Characteristics of Rheo-High Pressure Die Cast Al-Alloy 2139 Plates." Materials Science Forum 828-829 (August 2015): 100–105. http://dx.doi.org/10.4028/www.scientific.net/msf.828-829.100.

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Al-Cu-Mg-Ag alloy 2139 is a wrought alloy that is heat-treatable and used in aerospace constructions. This is mainly due to the addition of silver in the alloy. Hot-tearing is a problem for casting wrought alloys with conventional liquid casting techniques. The risk is reduced by using rheo-high pressure die casting (R-HPDC) to allow the alloy to be used for near-net shape forming of components. This study investigates the segregation characteristics of R-HPDC alloy 2139. The effects of segregation on the age-hardening response as well as the tensile properties are studied. The chemical compos

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14

Dybowski, B., A. Kiełbus, and R. Jarosz. "Mould Components Impact on Structure and Quality of Elektron 21 Alloy." Archives of Foundry Engineering 13, no. 2 (June 1, 2013): 17–23. http://dx.doi.org/10.2478/afe-2013-0029.

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Abstract Magnesium alloys due to their low density and high strength-to-weight ratio are promising material for the automotive and aerospace industries. Many elements made from magnesium alloys are produced by means of sand casting. It is essential to investigate impact of the applied mould components on the microstructure and the quality of the castings. For the research, six identical, 100x50x20mm plates has been sand cast from the Elektron 21 magnesium casting alloy. Each casting was fed and cooled in a different way: one, surrounded by mould sand, two with cast iron chills 20mm and 40mm th

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15

Znamenskii, L. G., A. N. Franchuk, and A. A. Yuzhakova. "Nanostructured Materials in Preparation Casting Alloys." Materials Science Forum 946 (February 2019): 668–72. http://dx.doi.org/10.4028/www.scientific.net/msf.946.668.

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The article deals with technologies of refining and inoculating casting alloys with the use of nanostructured diamond powder, as well as stimulation technique on molten metal including processing of the liquid alloy with nanosecond electromagnetic pulses. The developed method of cast iron inoculation allows to eliminate the flare and to increase the physical and mechanical properties of the castings through the grain refining and the decrease of chilling tendency during crystallization of the liquid alloy. Inoculating of aluminium alloys by high-melting particles of a nanostructured diamond po

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16

Liao, Dun Ming, Li Liang Chen, Jian Xin Zhou, and Rui Xiang Liu. "CAD/CAE Technology and its Application on Nonferrous Alloy Casting." Advanced Materials Research 139-141 (October 2010): 1113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1113.

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The nonferrous alloy castings will be much demanded with the development of aerospace, light-weight weapons and automotive industry. Casting CAD/CAE technology has played an increasingly important role in foundry. It can help technician to design casting process and simulate heat transferring and molten metal flowing before actual production. Firstly, the main contents and basic principles, mathematical models of casting CAD and CAE were introduced. Secondly, the casting CAD/CAE technology route was interpreted, and then several CAD/CAE applications of casting process design and simulating wer

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17

Kocurek, Robert, and Janusz Adamiec. "Structural Stability of Welded Joints of Magnesium Alloy EZ33A-T5." Materials Science Forum 782 (April 2014): 408–14. http://dx.doi.org/10.4028/www.scientific.net/msf.782.408.

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Magnesium alloys of Mg-Zn-RE-Zr group are characterized by creep resistance up to 250°C, good castability, absence of the microporosity and gas corrosion resistance. Defect of these alloys are low mechanical properties at ambient temperature. Magnesium alloys are used in the automotive, aerospace and defense industries, mainly as gravitational casts to sand moulds or die-casting. Casting defects often appear in these casts (misruns, micro-shrinkage, cracks), especially for large-size castings. The welding technologies are most often applicable to repair of casts, mainly non-consumable electrod

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18

Ozyegin, L. S., R. Tuncer, and E. Avci. "Hardness, Behavior and Metal Surface Evaluation of Recasting Non-Precious Dental Alloys." Key Engineering Materials 330-332 (February 2007): 1425–28. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.1425.

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Recasting of economic alloys can change several properties. The number of recasting was found to have negligible effect on surface texture and on the amount of corrosion products released. The methods and equipments utilized in the casting of an alloy are important on the quality of casting. Carbon incorporated in a noble or economic alloy during casting is known to affect the mechanical values of the metal. In the present study we aimed to investigate the change in structure and metal hardness due to recasting. Materials and method: The effect of recasting, up to four times of a non precious

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19

Prikhod’ko, O. G., V. B. Deev, E. S. Prusov, and A. I. Kutsenko. "Influence of thermophysical characteristics of alloy and mold material on castings solidification rate." Izvestiya. Ferrous Metallurgy 63, no. 5 (July 1, 2020): 327–34. http://dx.doi.org/10.17073/0368-0797-2020-5-327-334.

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Obtaining castings of given quality is the main task of foundry production. One of the stages of casting technology is solidification of melt in the mold. When studying the process of castings solidification, it is necessary to fully take into account all the features of heat transfer between casting and mold. Influence of various thermophysical parameters of alloy and mold material on casting formation is considered. In the analysis, original mathematical models were used to calculate the coefficient and time of complete solidification of castings in sand-clay and metal forms. These models ta

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Chirita, G., I. Stefanescu, Delfim Soares, and F. S. Silva. "Effect of Gravity/ Vibration/ Centrifugal Process on Mechanical Properties of an Al-Si Alloy." Materials Science Forum 587-588 (June 2008): 395–99. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.395.

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On this paper, a study that evaluates the influence of some variables on the mechanical properties of the vertical centrifugal casting is made. It is emphasized the fact that the centrifugal effect from vertical centrifugal casting brings special features on mechanical properties. It has been observed that the centrifugal effect may substantially increase, in some alloys, the rupture strength, rupture strain, and Young modulus, as compared to the gravity casting technique. When compared to gravity casting, the centrifugal casting process, besides the centrifugal force (pressure effect), always

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21

Qi, Ming Fan, Yong Lin Kang, Yuan Hao Zheng, Ji Cheng Wang, Gu Nan Li, and Ying Zhang. "Industrialization of Aluminum Alloy Uniform Solidification Controlled Rheological Die Casting." Solid State Phenomena 327 (January 10, 2022): 163–71. http://dx.doi.org/10.4028/www.scientific.net/ssp.327.163.

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An efficient and low-cost aluminum alloy uniform solidification control technology, namely, air-cooled stirring rod (ACSR) process, has been developed for preparing large volume semisolid slurry. The semisolid slurry preparation process is connected with the die-casting machine to form multiple integrated intelligent rheological die-casting production lines for the efficient preparation of rheological die-casting of large-scale thin-walled aluminum alloys. At present, the ACSR process can produce 40 kg of large-volume semisolid slurry with a solid phase ratio of 25% to 35% within 30 s. This rh

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Yang, Guang Yu, Wan Qi Jie, Qi Tang Hao, and Jie Hua Li. "Study on Process of Magnesium Alloy Investment Casting." Materials Science Forum 561-565 (October 2007): 1019–22. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.1019.

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The process of different sorts of magnesium alloys investment casting is studied using a mold materials composed of zircon and colloided silica binder. The investment shell is flushed out employing protective gas mixture of 1% HFC134a and inert gas. The castings with perfect appearance and high metallurgical quality are produced successfully for ZC62 and ME-1magnesium alloy respectively. The mechanical properties of the castings reached the ASTM standard.

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He, Li Tong, Yi Dan Zeng, and Jin Zhang. "Solidification and Microstructure Simulation of A356 Aluminum Alloy Casting." Materials Science Forum 1033 (June 2021): 18–23. http://dx.doi.org/10.4028/www.scientific.net/msf.1033.18.

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To obtain an A356 aluminum alloy casting with a uniform structure and no internal shrinkage defects, ProCAST software is used to set different filling and solidification process parameters for an A356 aluminum alloy casting with large wall thickness differences, And multiple simulations are conducted to obtain optimized casting process; then, based on the process, the microstructure of the thickest and thinnest part of the casting are simulated. The size, morphology, and distribution of the simulated microstructure of the thinnest part and the thickest part of the casting are very similar. The

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Visik, E. M., L. I. Rassokhina, A. B. Echin, and M. V. Gamazina. "Some aspects of improving the quality of GTE cast turbine blades of nickel superalloys." Voprosy Materialovedeniya, no. 4(108) (January 31, 2022): 82–98. http://dx.doi.org/10.22349/1994-6716-2021-108-4-82-98.

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The results of the development of casting technology for single-crystal high-pressure turbine blades from nickel superalloys with a crystallographic orientation (CGO) [001] were obtained on an automated casting unit for directional crystallization UVNK-9A, at machine-building enterprise. The construction of the casting blades blocks, technologies for the manufacture of molds, rods and casting of GTE working blades of heatresistant nickel alloys with a single-crystal structure and set-up CGO have been developed under real production conditions on UVNK-9A units substituting through-type furnaces

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Cheng, Le, Hong Xing Lu, Qiang Zhu, Xiang Kai Zhang, Ai Di Shen, and Peng Yang. "Evolution of Microstructure and Mechanical Properties of Semi-Solid Squeeze Cast A356.2 Aluminum Alloy during Heat Treatment." Solid State Phenomena 285 (January 2019): 139–45. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.139.

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Semi-solid squeeze casting (SS-SC) is a new processing technology which combines semi-solid processing (SSP) and squeeze casting (SC). In this process, semi-solid slurry fills mold by using its rheological property and solidifies under high pressure. It has several advantages, such as stable filling, small heat impact to the mold, low cost, high density and excellent mechanical properties of castings, which receives more and more attention. The microstructure of castings provided by SS-SC is quite different from that of casting provided by conventional SC in as-cast condition, which leads to d

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Gaspar, Stefan, and Jan Pasko. "Increase Pressure and Homogeneity of Die Castings from EN AC 47100 Alloy." Applied Mechanics and Materials 729 (January 2015): 108–13. http://dx.doi.org/10.4028/www.scientific.net/amm.729.108.

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In the pressure die casting process, a great attention is paid to a die castings quality improvement. This quality has to be ensured with a great reliability and, at the same time, it is necessary to apply control methods to a technological process which provide a complete picture of a die casting process as well as internal quality of the produced die castings. It requires control of the present technological factors of a pressure die casting process. The contribution deals with the effect of die casting plunger velocity inside a filling chamber on mechanical properties of a die casting produ

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Władysiak, R. "Effect of Multipoint Sequential Water Mist Cooling of Casting Die on Microstructure and Mechanical Properties of AlSi11 Alloy." Archives of Foundry Engineering 12, no. 4 (December 1, 2012): 145–50. http://dx.doi.org/10.2478/v10266-012-0123-9.

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Abstract The work is a continuation of research on the use of water mist cooling in order to increase efficiency of the die-casting process for aluminum alloys. The paper describes the multipoint sequential cooling system of the casting die and its computer control and monitoring. It also includes results of the tests and analysis of cooling methods during making of the casting. These methods differ from each other in the sequence of casting die cooling and cause effective changes in microstructure and mechanical properties of castings made of AlSi11 alloy. The study demonstrated that the use

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Krishnan, Arjun Bala, Kavin Selvaraj, Akhil Madhusoodhanan Geethakumari, and Ravi Manickam. "Effect of Heat Treatment on the Microstructure of Gravity Cast and Squeeze Cast Al-Si-Mg Alloy." Materials Science Forum 830-831 (September 2015): 164–67. http://dx.doi.org/10.4028/www.scientific.net/msf.830-831.164.

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The present work deals with the effect of solutionising heat treatment on the features of Al-7Si-0.3Mg (A356) alloy in terms of microstructural modifications and hardness. The microstructure of sand cast and gravity cast alloys are coarse which results in lower strength compared to the alloys cast using modern casting techniques such as squeeze casting which is used for the fabrication of near-net-shaped castings. The influence of enhanced cooling rate on the hardness and microstructure of the squeeze casting technique has been exploited in the present study. In order to optimise the heat trea

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Kordas, P. "Influence of the conditions of casting and heat treatment on the structure and mechanical properties of the AlMg10 alloy." Journal of Achievements in Materials and Manufacturing Engineering 1, no. 83 (July 1, 2017): 26–32. http://dx.doi.org/10.5604/01.3001.0010.5137.

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Purpose: Assessment of the possibilities of shaping the structure and improvement of mechanical properties of casting from AlMg10 alloy through a selection of casting technology and precipitation hardening. Design/methodology/approach: the work evaluated the impact of casting and heat treatment technology on the mechanical properties and structure of AlMg10 alloy castings. The tests were performed on 200 mm × 100 mm × 25 mm plate castings produced by gravity casting methods for sand and metal moulds and by a liquid state press moulding technology. Castings made with these technologies solidify

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Amenova, Aliya, and Dauletkhan Smagulov. "Optimization of the Compositions of the High Strength Casting Aluminium Alloys Based on Nickel Eutectic." Advanced Materials Research 911 (March 2014): 152–57. http://dx.doi.org/10.4028/www.scientific.net/amr.911.152.

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The phase composition of the AlNiMnFeSiZr system was analyzed with respect to new-generation heat resistant casting aluminum alloys based on a Ni-containing eutectic, which are strengthened by the Al3Zr (L12) nanoparticles. It is shown that the presence of iron and silicon considerably complicates the phase analysis compared with the AlNiMnFe base alloy. Alloys with low silicon content have a sufficiently good casting property, which enables fabrication of thin-walled castings, not inferior to AA356 alloy types widely used to cast complex shapes. Addition of silicon to the AlNiMnFe base alloy

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Fracchia, Elisa, Ivano Gattelli, and Marco Actis Grande. "Characterisation of Residual Stresses of Rheocast Al Alloy." Solid State Phenomena 347 (August 24, 2023): 31–37. http://dx.doi.org/10.4028/p-cq6pqs.

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Rheocasting is a semisolid casting process allowing to obtain near-net shape parts. Through the Rheocasting process, it is possible to achieve aluminium castings having a low grade of porosity if compared to traditional die-casting methods, encouraging the production of automotive frame parts. However, casting processes, as commonly known, may cause tensile residual stresses inside the parts. On the other hand, compressive stresses inside castings can significantly increase the life of components: residual compressive stresses increase the material's resistance by counteracting crack initiatio

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Kim, Myoung Gyun, Gyu Chang Lee, and Joon Pyo Park. "Continuous Casting and Rolling for Aluminum Alloy Wire and Rod." Materials Science Forum 638-642 (January 2010): 255–60. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.255.

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Since the Continuous Casting & Rolling of the non-ferrous metal by Illario Properzi have invented in 1944, the various non-ferrous rod, wire and sheet are produced at present. Although there is long research and trials for producing the wire or rod of commercial the high-strength aluminum alloy, there are few companies with the success in producing commercial hard-aluminum alloys wire and rod by CC&R process. The application of the high-strength aluminum alloy rod or wire is various parts such as rivet, bolt, sports leisure supplies, high-tension power transmission wire, machinable and

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Drotlew, A., M. Garbiak, and B. Piekarski. "Cast Steels for Creep-Resistant Parts Used in Heat Treatment Plants." Archives of Foundry Engineering 12, no. 4 (December 1, 2012): 31–38. http://dx.doi.org/10.2478/v10266-012-0103-0.

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Abstract Creep-resistant parts of heat treatment furnaces are in most cases made from high-alloyed chromium-nickel and nickel-chromium iron alloys, both cast and wrought. This paper presents the types of casting alloys used for this particular purpose, since the majority of furnace components are made by the casting process. Standards were cited which give symbols of alloy grades used in technical specifications by the domestic industry. It has been indicated that castings made currently are based on a wider spectrum of the creep-resistant alloy grades than the number of alloys covered by the

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Koltygin, A. V., V. E. Bazhenov, S. A. Tavolzhanskii, S. V. Matveev, I. V. Plisetskaya, M. V. Belov, A. V. Samokhin, and V. D. Belov. "Production of filler rods for repair welding of ML12 (ZK51) magnesium alloy castings." Izvestiya Vuzov. Tsvetnaya Metallurgiya (Universities' Proceedings Non-Ferrous Metallurgy), no. 3 (June 15, 2022): 47–56. http://dx.doi.org/10.17073/0021-3438-2022-3-47-56.

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In magnesium alloys castings, the casting defects such as shrinkage porosity are often occur. Such defects can be suppressed by repair welding or surfacing using a special filler rod. Unfortunately, in Russia, the low amount of filler rod is consumed. Therefore, native enterprises do not manufacture it, limiting themselves to imports or homemade low-quality substitutes. Nevertheless, there is a need for filler rod, and recently it has become unprofitable to replace them with imported materials due to a significantly increased price. Therefore, there is a need to study the technology of its pro

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Hussainy, Syed Ferhathullah, Mohd Viquar Mohiuddin, P. Laxminarayana, S. Sundarrajan, and A. Krishnaiah. "Analysis of Shrinkage Characteristics of Aluminium Silicon Alloy." Journal for Manufacturing Science and Production 16, no. 3 (September 1, 2016): 163–71. http://dx.doi.org/10.1515/jmsp-2016-0002.

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AbstractAnalysis of shrinkage characteristics of Aluminium-Silicon alloy was studied theoretically and experimentally. The Aluminium alloys considered in the study are A413 (LM6), A360 (LM9) and A380 (LM24). Extensive literature survey has suggested that cavity filling and solidification process are two most critical aspects to produce high quality casting components. A statistical model of parameters and response to understand the influence of parameters on shrinkage and casting yield studies has been presented. Experiments were conducted in foundry in industrial environment to produce commer

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Hu, Wu, Ke Zhu, Meng Wang, Wei Dong Huang, and Jian Min Zeng. "Study on Linear Segregation of ZL205A Alloy." Materials Science Forum 1020 (February 2021): 8–12. http://dx.doi.org/10.4028/www.scientific.net/msf.1020.8.

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Linear segregation of high strength aluminum alloy ZL205A castings were studied by X-ray Nondestructive testing, scanning electron microscope and energy dispersive spectrometer. It is found that the linear segregation occurs at the large wall thickness of the casting and/or at the place where the wall thickness is in transition. Segregation element is mainly Cu, which exists as compound θ (Al2Cu) phase. The formation of linear segregation is related to the flow of Cu-rich melt in the late solidification period, while the occurrence of thermal cracks promotes the formation of linear segregation

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Sekar, K., Allesu Kanjirathikal, and M. A. Joseph. "Comparison Study of As-Cast and T6 Condition of Microstructure, Bending Strength and Double Shear Strength of A356 Alloy by Gravity, Vacuum and Squeeze Casting." Applied Mechanics and Materials 592-594 (July 2014): 102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.102.

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The hardness, bending strength, and double shear strength of A356 aluminium alloy was studied under as cast and T6 heat treatment conditions obtained with gravity casting, vacuum casting and squeeze casting methods. The results of these three casting methods have been compared. The hardness, bending strength of A356 alloy after T6 obviously increased; the hardness value of both vacuum casting and squeeze casting has been found to be 62 HRB which is relatively high compared to gravity casting. The bending strength of gravity casting is 299 MPa (22% increase) compared to vacuum casting. However,

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Won, Chun-Soo, Jae Pil Jung, Kwang-Sik Won, and Ashutosh Sharma. "Technological Insights into the Evolution of Bronze Bell Metal Casting on the Korean Peninsula." Metals 12, no. 11 (October 22, 2022): 1776. http://dx.doi.org/10.3390/met12111776.

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Bronze cast bells have been designed and developed for hundreds of years, with the worldwide spread of several faiths and religions such as Buddhism, Catholicism, and Protestantism. The exceptional ringtones of bronze bell metals have scientific healing and cultural importance. In this review article, we highlight the evolution of bronze bell metal over the decades, its composition, and the complex fabrication technologies used to date. Furthermore, we overview ancient and modern casting alloy technology, especially bronze bell castings in Asia. The bell shape, materials, and alloy casting tec

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Bobba, Sujith, Sambasiva Rao Mukkollu, Z. Leman, and Harish Babu Bachina. "Experimental Investigation on the Effect Due to Mould Vibrations on Mechanical and Metallurgical Properties of Aluminum Alloy (A-1050)." International Journal of Surface Engineering and Interdisciplinary Materials Science 9, no. 1 (January 2021): 77–86. http://dx.doi.org/10.4018/ijseims.2021010105.

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In the current research work performed, the consequences caused in the casting aluminum alloy specimen due to mechanical mould vibrations are examined. Mould vibration throughout the casting provides decreased rate of shrinkage, good morphology, surface finish and lesser probability of hot tear. In this research work, the effect of mould vibration during solidification of Aluminum A-1050 alloys for dissimilar values of wavelengths at a permanent pouring temperature has been investigated to understand the modification in microstructure and mechanical properties after casting. The Al A-1050 cast

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Adamiec, Janusz. "The Quantitative Assessment of the Fracture Profile of Magnesium Alloy QE22 Welded Joint." Solid State Phenomena 197 (February 2013): 215–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.197.215.

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Magnesium alloys are a part of a group of lightweight and ultra-lightweight alloys, which are important in practical use in constructions. QE22 casting magnesium alloy containing silver, rare earth elements and zirconium is characterized by creep resistance up to the temperature of 200 °C, while during a short exposure it can resist up to the temperature of 250°C. Nowadays, QE22 magnesium alloy are used for casting into sand moulds. In castings of magnesium alloys defects or inconsistencies (such as casting misruns, porosities and cracks) often appear, particularly in huge dimensional castings

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SUN, ZHI, YANWEI SUI, AIHUI LIU, BANGSHENG LI, and JINGJIE GUO. "RESEARCH OF MECHANICAL PROPERTY GRADIENT DISTRIBUTION OF Al-Cu ALLOY IN CENTRIFUGAL CASTING." Surface Review and Letters 18, no. 06 (December 2011): 297–301. http://dx.doi.org/10.1142/s0218625x11014795.

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Al-Cu alloy castings are obtained using centrifugal casting. The regularity of mechanical property gradient distribution of Al-Cu alloy castings with the same centrifugal radius at different positions is investigated. The result shows that the tensile strength, yield strength, elongation and microscope hardness exhibit the following gradient distribution characteristic — high on both sides and low on the center. The trend of mechanical property gradient distribution of Al-Cu alloy increases with the increase in the rotation speed. Moreover, the mechanical properties of casting centerline two s

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Shao, Heng, Yan Li, Peng Zhao, Hai Nan, and Qing Yan Xu. "Numerical Simulation of Centrifugal Casting Process of Large Thin-Wall Ti Alloy Casting." Materials Science Forum 850 (March 2016): 469–81. http://dx.doi.org/10.4028/www.scientific.net/msf.850.469.

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Centrifugal pouring is often used in investment casting of large thin-wall Ti castings to promote filling. Shrinkage defects often appear in a Ti casting produced by centrifugal casting. Numerical simulation indicate that shrinkage is caused by these reasons: improper pouring system and thin-wall structure limited feeding of liquid metal from pouring system, and centrifugal force enlarged the shrinkage defects by strengthen feeding of liquid within the casting. Thus centrifugal casting is replaced by gravity casting and a new pouring system is adopted. Obvious shrinkage defects disappear in th

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Liu, De Fang, and Jie Tao. "Application of Automobile Lightweight Alloys and the Development of its Die-Casting Technology." Advanced Materials Research 308-310 (August 2011): 785–89. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.785.

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With the development of lightweight vehicles, lightweight alloy materials has been increasingly used in automotive industry, automobile manufacturers are therefore looking for thinner and stronger materials so that the higher requirements has became a challenge to lightweight alloy die-casting technology. The paper summarized the applications of lightweight alloys in the automotive industry, and the new advances of lightweight alloys die-casting technology, such as low pressure die-casting, semi-solid die casting, oxygenation die-casting and the combination of different die-casting technologie

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Gaspar, S., and J. Pasko. "Pressing Speed, Specific Pressure and Mechanical Properties of Aluminium Cast." Archives of Foundry Engineering 16, no. 2 (June 1, 2016): 45–50. http://dx.doi.org/10.1515/afe-2016-0024.

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Abstract Recent research in the process of aluminum alloy die castings production, which is nowadays deeply implemented into the rapidly growing automobile, shipping and aircraft industries, is aimed at increasing the useful qualitative properties of the die casting in order to obtain its high mechanical properties at acceptable economic cost. Problem of technological factors of high pressure die casting has been a subject of worldwide research (EU, US, Japan, etc.). The final performance properties of die castings are subjected to a large number of technological factors. The main technologica

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Yang, Xiang Jie, Yi He, Yong Bo Zhu, Chuan Lin Hu, Hong Min Guo, Yun Hai Jing, and Guang Bin Yi. "The Study of A356 Alloy Rheo-Squeeze Casting Process." Solid State Phenomena 256 (September 2016): 270–75. http://dx.doi.org/10.4028/www.scientific.net/ssp.256.270.

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In this paper, the castings of A356 alloy were made by the rheo-squeeze casting with slurry-making from the process of LSPSF. Experiments were designed to study the influence of three parameters in rheo-squeeze casting process, such as injection speed, mould preheating temperature and injection pressure, on castings performance. The results show that high-quality castings were produced with the injection speed of 0.5m/s ,the mould preheating temperature of 240°C, the injection pressure of 50MPa. The mechanical properties, such as the yield strength, tensile strength and elongation of the casti

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Niakan, Ali Asghar, M. H. Idris, A. Ourdjini, and Majid Karimian. "Effect of Applying Air Pressure on Gas Porosity in Lost Foam Casting of Al-Si Alloy." Advanced Materials Research 628 (December 2012): 150–55. http://dx.doi.org/10.4028/www.scientific.net/amr.628.150.

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The paper presents the result of investigation on aluminum-silicon (LM6) alloy cast using pressurized lost foam casting process. The study investigated the effect of pressure and sand size on porosity of the casting produced. Air pressure of 1, 2, 3 and 4 bars was applied on the solidifying alloy poured in mould of sand sizes 16-30, 40-60, 60-100 (AFS). The porosities of casting were measured using optical microscope which was equipped with image analyzer. For porosity of castings, all surfaces of solidified castings were captured by digital camera for better observation. The results show that

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Xu, Yong Tao, Tian Yang Guan, Zhi Feng Zhang, Yue Long Bai, and Wei Min Mao. "Semi-Solid Rheological Squeeze Casting Process of ZL114A Aluminum Alloy Thin-Wall Complex Casting." Materials Science Forum 993 (May 2020): 248–53. http://dx.doi.org/10.4028/www.scientific.net/msf.993.248.

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High-strength aluminum alloy with large-scale and thin-walled complex castings have broad application prospects in aerospace, weapons, electronics, defense and military industries. However, due to the uneven thickness of the plate, the casting defects are inevitable by the ordinary casting method, and it is impossible to accurately control the shape and performance of the casting in the casting process. Previous studies have found that the semi-solid rheological extrusion casting technology with short process and near-end type can help solve this technical problem. Therefore, this paper studie

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Kierzek, Agata, and Janusz Adamiec. "Creep Resistance of WE43 Magnesium Alloy Joints." Solid State Phenomena 191 (August 2012): 177–82. http://dx.doi.org/10.4028/www.scientific.net/ssp.191.177.

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Magnesium alloys of Mg-Y-RE-Zr series are characterized by creep resistance up to a temperature of 250 ° C, and can work up to a temperature of 300oC. These properties allow for the application of alloys of Mg-Y-RE-Zr series for the elements of racing car engines operating in the conditions of high loads and temperatures. The requirement of high reliability components of aircraft propulsion system, with high strength and corrosion resistance, also led to the use of these alloys in the aerospace industry. Welding technologies in cast magnesium alloys are applied in order to repair defects in ca

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Vanko, Branislav, Ladislav Stanček, and Roman Moravčík. "EN AW-2024 Wrought Aluminum Alloy Processed by Casting with Crystallization under Pressure." Strojnícky casopis – Journal of Mechanical Engineering 67, no. 2 (November 1, 2017): 109–16. http://dx.doi.org/10.1515/scjme-2017-0024.

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AbstractBy using the wrought aluminum alloys can be created castings with higher mechanical properties than the castings made of standard foundry aluminum alloys, but it is necessary to handle the process of making sound castings without any defects such as hot tears and shrinkage porosity. In experiments, we have been studied of wrought aluminum alloy EN AW-2024 which has been processed by the casting with crystallization under pressure with forced flow. Castings were heat treated by standard T6 heat treatment.

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Shang, Shu Zhen, Jiao Jiao Wang, Gui Min Lu, and Xiao Ling Tang. "Study on the Semi-Solid Thixo-Diecasting Process of Aluminum Alloys and Die Design." Solid State Phenomena 192-193 (October 2012): 460–65. http://dx.doi.org/10.4028/www.scientific.net/ssp.192-193.460.

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The constitutive equation of semi-solid 6061 alloy was established according to the thermal simulation compression tests of semi-solid billet of 6061 alloy prepared by near-liquids semi-continuous casting method. Parameters of Bingham model, such as apparent viscosity, had been investigated based on the constitutive equation of semi-solid 6061 alloy. The software ANYCASTING was applied to simulate and analyze the semi-solid die-casting processes of semi-solid 6061 alloy. A well-designed runner and gating system of automobile aluminum alloy part were presented and the casting defect were invest

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