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Journal articles on the topic 'High pressure die casting'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Jelínek, P., and E. Adámková. "Lost Cores for High-Pressure Die Casting." Archives of Foundry Engineering 14, no. 2 (2014): 101–4. http://dx.doi.org/10.2478/afe-2014-0045.

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Abstract Development of salt cores prepared by high-pressure squeezing and shooting with inorganic binders has shown a high potential of the given technology even for high-pressure casting of castings. Strength, surface quality of achieved castings, and solubility in water become a decisive criterion. The shape and quality of grain surface particularly of NaCl - cooking salts that can be well applied without anticaking additives has shown to be an important criterion. Thus the salt cores technology can cover increasingly growing demands for casting complexity especially for the automobile indu

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2

Sun, Junhao. "Casting process design of high pressure and heat resistant steam chamber casting." Highlights in Science, Engineering and Technology 62 (July 27, 2023): 156–63. http://dx.doi.org/10.54097/hset.v62i.10438.

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This paper is about the casting process of high pressure and heat resistant steam chamber casting. The castings are made of ZG15Cr2Mo1. The internal and external quality requirements of the casting are demanding. There are many grade 0 and grade 1 defect areas in castings, which requires that these positions should not have shrinkage cavity and porosity and other defects.This casting scheme includes the design scheme of modeling, modeling material selection, coating selection, parting surface and casting system establishment, process parameters establishment, sand core design, casting riser de

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3

Semanco, Pavol, Marcel Fedák, Miroslav Rimár, Peter Skok, and Emil Ragan. "Equation Model of the Cooling Process in High Pressure Die-Casting Technology." Advanced Materials Research 505 (April 2012): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.505.165.

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In the die-casting technology there is very necessary to determine cooling process of castings in metallic mold especially in the case of castings with great weight to achieve quality surface and properties of the casting without any defects. To regulate cooling in the time course, it is desirable to develop equation of regulation system that determining mold temperature dependence on casting temperature. In the paper we proposed model of regulatory system in the cooling process of casting in a mold that is based on an analysis of amplitude, phase and transition characteristics. The result is

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4

Chechukha, V. I., and M. A. Sadokha. "Defects in castings during high‑pressure casting and measures to prevent their formation." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 1 (April 10, 2024): 26–31. http://dx.doi.org/10.21122/1683-6065-2024-1-26-31.

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The article presents a list of defects in castings formed during high‑pressure casting. It has been established that each cause that creates conditions for the formation of specific defects in castings is interconnected with the incorrect setting of specific casting technological parameters. Measures to prevent the formation of defects have been determined depending on the casting technological parameters, operating modes of the mold, application of release lubricant, and alloy preparation. To ensure high quality of produced castings, it is necessary to minimize the influence of the human fact

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5

Pałyga, Ł., M. Stachowicz, and K. Granat. "Effect of parameters of high-pressure die casting on occurrence of casting nonconformities in sleeves of silumin alloy EN AB 47100." Archives of Metallurgy and Materials 62, no. 1 (2017): 373–78. http://dx.doi.org/10.1515/amm-2017-0058.

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Abstract The paper presents a research on the effect of extreme - for the technology of the considered silumin EN AB 47100 - parameters of high-pressure die casting on occurrence of casting nonconformities. Considered was influence of the way of assembling the mould cooled-down to 140-160°C, non-standard for the selected casting, and pouring temperature in the range of 705 to 720°C (higher than the recommended) of non-refined alloy. The castings were prepared with use of a high-pressure casting machine made by Kirov with mould closing force of 2500 kN. Occurrence of nonconformities was evaluat

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6

Chechukha, V. I., and M. A. Sadokha. "Defects in high‑pressure die casting and measures to prevent gas defects." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 4 (December 15, 2023): 16–24. http://dx.doi.org/10.21122/1683-6065-2023-4-16-24.

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The formation of defects in the manufacturing of castings is influenced by numerous factors. These factors can affect the quality both individually and in combination. This article provides a characterization of the defects encountered in high‑pressure die casting and identifies the factors influencing their formation. Effective measures are examined to reduce casting defects, which are recommended for obtaining critical and highly demanding castings with stringent surface requirements after mechanical processing.The use of automated high‑pressure die casting complexes in production has a posi

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7

Advekar, Amitkumar, Y. Arunkumar, and M. S Srinath. "Study of Process Parameters in High Pressure Die Casting." International Journal of Science and Research (IJSR) 11, no. 6 (2022): 686–94. http://dx.doi.org/10.21275/sr22609200329.

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8

Molnár, Dániel, Ádám Kiss, and Csaba Majoros. "Casting Issues of Thick-Walled High Pressure Die Castings." International Journal of Engineering and Management Sciences 5, no. 2 (2020): 159–66. http://dx.doi.org/10.21791/ijems.2020.2.20.

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Die casting is a manufacturing process for producing accurately dimensioned, sharply defined, smooth or textured surface metal parts. It is accomplished by injecting liquid metal at fast velocity and under high pressure into reusable steel dies. Compared to other casting processes, die casting is at the top end of both velocity and pressure. The high velocity translates into a very turbulent flow condition. The process is often described as the shortest distance between raw material and the finished product. Pre-fill is a process technique that is the result of significantly delaying the

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9

Gaspar, S., and J. Pasko. "Pressing Speed, Specific Pressure and Mechanical Properties of Aluminium Cast." Archives of Foundry Engineering 16, no. 2 (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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10

Łągiewka, M., Z. Konopka, M. Nadolski, and A. Zyska. "The Effect of Vacuum Assistance on the Quality of Castings Produced by High Pressure Die Casting Method." Archives of Foundry Engineering 14, no. 2 (2014): 23–26. http://dx.doi.org/10.2478/afe-2014-0030.

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Abstract The presented work is aimed to deal with the influence of changes in the value of negative (relative) pressure maintained in the die cavity of pressure die casting machine on the surface quality of pressure castings. The examinations were held by means of the modified Vertacast pressure die casting machine equipped with a vacuum system. Castings were produced for the parameters selected on the basis of previous experiments, i.e. for the plunger velocity in the second stage of injection at the level of 4 m/s, the pouring temperature of the alloy equal to 640°C, and the die temperature

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11

Kasprzak, Wojciech, and Hirotaka Kurita. "Optimizing Process Parameters for Aluminum-Silicon High Pressure Die Cast Powertrains." AM&P Technical Articles 175, no. 4 (2017): 17–24. http://dx.doi.org/10.31399/asm.amp.2017-04.p017.

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Abstract Aluminum components with refined microstructures produced by high pressure die casting enable manufacturers to gain energy savings via shorter production cycles—if casting and tempering parameters are optimized. This article reports on research results indicating it is possible to increase hardness of hypereutectic Al-Si alloys by optimizing the water quenching rate and duration of room temperature hold, and producing castings with finer microstructures.

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12

Liu, Yixiong, Haiping He, Jixiang Gao, Gang Li, Yi Liang, and Liejun Li. "Research on the low-pressure casting process of a double suction impeller in 304 austenitic stainless steel with high performance and thin-wall complex structure." Journal of Physics: Conference Series 2390, no. 1 (2022): 012078. http://dx.doi.org/10.1088/1742-6596/2390/1/012078.

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Abstract The manufacturing of thin-wall complex castings using pressure-assisted casting is one of the most significant challenges for structural applications requiring excellent mechanical properties and fuel. In this paper, efforts have been made to manufacture thin-wall complex structure casting using high-temperature alloys with high strength. Low pressure casting forming process was used to manufacture a double suction impeller in 304 austenitic stainless steel with a thin-wall complex structure. By combining 3D printed sand mold with an optimized low-pressure casting process, a double su

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13

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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14

Skorulski, G. "3DP Technology for the Manufacture of Molds for Pressure Casting." Archives of Foundry Engineering 16, no. 3 (2016): 99–102. http://dx.doi.org/10.1515/afe-2016-0058.

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Abstract The paper presents the use of rapid prototyping technology of three dimensional printing (3DP) to make a prototype shell casting mold. In the first step, for identification purposes, a mold was prepared to enable different alloys to be cast. All molds being cast were designed in a universal CAD environment and printed with the zp151 composite material (Calcium sulfate hemihydrate) with a zb63 binder (2-pyrrolidone). It is designated to be used to prepare colourful models presenting prototypes or casting models and molds. The usefulness of 3DP technology for use with copper alloys, alu

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15

Jie, Wan Qi, Xin Lei Li, and Qi Tang Hao. "Counter-Gravity Casting Equipment and Technologies for Thin-Walled Al-Alloy Parts in Resin Sand Molds." Materials Science Forum 618-619 (April 2009): 585–89. http://dx.doi.org/10.4028/www.scientific.net/msf.618-619.585.

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A counter-gravity casting equipment (CGCE) has been developed, which is specially designed for the production of large-size thin-walled high-quality aluminum alloy parts with resin sand molds. In this equipment, molten metal will be pushed upward counter-gravity into the mold at predetermined rate by compressed air, and solidified at an increased pressure. The equipment uses assembled valve system developed ourselves, and has sensitive pressure-adjusting property. All of the casting parameters, including filling rate, pressure-exerting sequence, pressure hold time etc., can be closely controll

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16

Ružbarský, Juraj, and Štefan Gašpár. "Analysis of Selected Production Parameters for the Quality of Pressure Castings as a Tool to Increase Competitiveness." Applied Sciences 13, no. 14 (2023): 8098. http://dx.doi.org/10.3390/app13148098.

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The research conducted in the paper highlights the importance of pressure or holding pressure in the mold cavity as a critical production parameter in the high-pressure die casting process for Al-Si alloys. The experiments revealed a direct correlation between the pressure or holding pressure in the mold cavity and the mechanical properties of the castings, including ultimate tensile strength, percentage share of porosity, and the structure of the alloys. The results of the experiments showed that increasing the pressure or holding pressure in the mold cavity led to an increase in ultimate ten

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17

Kowalczyk, Wojciech, Rafał Dańko, Marcin Górny, Magdalena Kawalec, and Andriy Burbelko. "Influence of High-Pressure Die Casting Parameters on the Cooling Rate and the Structure of EN-AC 46000 Alloy." Materials 15, no. 16 (2022): 5702. http://dx.doi.org/10.3390/ma15165702.

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The paper presents the results of the research on the impact of process parameters of high-pressure, cold-chamber die casting of an industrial casting made of aluminium alloy on the casting properties assessed macroscopically by measuring the casting average density and microscopically through the characteristics of the casting microstructure. The analysis covers the influence of three selected velocity settings of the pressing plunger, which determine the filling time, and three values of the compression pressure setting characteristic of the third phase of the casting process. The cooling an

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18

Jeon, Joo Mae, Soo Jo Lee, Kyeong Hwan Choe, and Jeung-Soo Huh. "Gas Pressure Effect on Sand Collapse in Kinetic Zone of Lost-Foam Casting." Advances in Materials Science and Engineering 2020 (April 25, 2020): 1–9. http://dx.doi.org/10.1155/2020/5861017.

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Pressure of the kinetic zone is an essential factor for making defect-free castings in lost-foam casting process. The extremely high pressure causes many problems, such as reducing the melt velocity and inclusion of residual decomposition of the pattern in the castings, and very low pressure causes sand collapse. Therefore, the minimum gas pressure for preventing sand collapse is required. When the minimum gas pressure can be predicted, computer simulation becomes possible. Successful computer simulations can help reduce the number of trials and the lead time while designing new casting produc

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19

Liu, Zi Kang, Min Luo, Da Quan Li, Long Fei Li, and Jian Feng. "Effects of Process Parameters on Shrinkage Porosity in 357 Semi-Solid Die Casting Parts." Materials Science Forum 993 (May 2020): 166–71. http://dx.doi.org/10.4028/www.scientific.net/msf.993.166.

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The shrinkage porosity that was caused by the insufficient feeding during solidification, was a common defect in the semi-solid die casting process. This defect decreased significantly the mechanical properties of the casting. In order to avoid the shrinkage porosity in casting, the die design, slug preparation and die casting process were carefully considered. In this study, a designed mold was used to make the sequential solidification of the slug. The process parameters, including intensification pressure, die temperature and biscuit thickness of the casting, were studied to show their infl

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20

Gunasegaram, Dayalan R., Michel Givord, and Robert G. O'Donnell. "ATM: A Greener Variant of High Pressure Die Casting." Materials Science Forum 618-619 (April 2009): 27–31. http://dx.doi.org/10.4028/www.scientific.net/msf.618-619.27.

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ATM high pressure die casting technology (ATM) is a variant of the traditional high pressure die casting (HPDC) process and is distinguishable by its characteristic lean runners that increase process yields. Reduced raw material consumption helps ATM leave a smaller footprint on the environment by lowering greenhouse gas (GHG) emissions during primary processing of the alloys and in their melting and handling in the foundry. Further avenues for reducing GHG emissions are raised by the use of ATM technology which improves the integrity of castings - facilitating the adoption of lighter weight c

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21

Boroń, Kinga. "Evaluation of porosity of AlZn5Mg castings made by squeeze casting technology." Acta Innovations, no. 32 (July 1, 2019): 12–19. http://dx.doi.org/10.32933/actainnovations.32.2.

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The paper shows the results of research aimed to assess the impact of high squeeze pressure on the porosity of AlZn5Mg alloy castings, including its distribution in slab-type castings with dimensions of 25 x 100 x 200 mm. The research was carried out on castings made by two methods: squeeze casting and gravity casting. The pressing was conducted at a pressure of 100 MPa at an initial mould temperature of 200°C. The research identified the middle and outer parts of the casting. Experimental research was preceded by numerical simulation of the casting solidification, then a porosity assessment w

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22

Zhang, Sai, Pengfei Ren, Kangle Wang, Bo Liu, and Xianming Meng. "Influence of High-Speed Ram Transition Position on Porosity and Mechanical Properties of Large One-Piece Die-Casting Al-Si-Mn-Mg Aluminium Alloy." Materials 17, no. 24 (2024): 6169. https://doi.org/10.3390/ma17246169.

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The high-pressure die-casting process can effectively manufacture aluminium alloy castings with complex shapes and thin wall thicknesses. However, due to the complex flow characteristics of the liquid metal during the mould-filling process, there are significant differences in the mechanical properties of different parts of the casting. This paper analyses the effect of the high-speed ram transition position on porosity and mechanical properties of Al-Si-Mn-Mg aluminium alloys in the high-pressure die-casting (HPDC) process, comparing the 1160 mm and 1200 mm positions. Using a comprehensive me

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23

NAIR, AKHIL K. RAVEENDRAN, and AMOL N. PATIL PROF. "OPTIMIZATION OF RUNNER DESIGN IN HIGH PRESSURE DIE CASTING (HPDC) DIE." JournalNX - A Multidisciplinary Peer Reviewed Journal 3, no. 4 (2017): 162–65. https://doi.org/10.5281/zenodo.1453840.

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In order to produce high quality parts with high pressure die casting, computer aided simulation has been used to optimize mold designs. Finite difference (differential), finite volume and finite element methods have been used in the filling process simulation and significant progress has been made for general problems. Further work on mold design optimizations is still desired to address specific issues. In die casting, the die often has more than one cavity with multiple cavities producing the same or different parts. Multiple cavities require the application of branch runners connecting to

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24

Dúl, Jenő, Richárd Szabó, and Attila Simcsák. "Effect of Temperature on the Properties of High Pressure Die Casting." Materials Science Forum 649 (May 2010): 473–79. http://dx.doi.org/10.4028/www.scientific.net/msf.649.473.

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Quality of high pressure die castings is influenced by a lot of factors. Among them, the most important ones are the melt-, and die temperatures. This paper shows a data acquisition system, developed for measuring the melt and die temperatures and the results of the temperature measurements obtained under variable conditions. Evaluation of the relationship between the interrelated temperatures and the casting properties is based on analyzing the structure of the castings.

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Zyska, A., Z. Konopka, M. Łągiewka, and M. Nadolski. "Porosity of Castings Produced by the Vacuum Assisted Pressure Die Casting Method." Archives of Foundry Engineering 15, no. 1 (2015): 125–30. http://dx.doi.org/10.1515/afe-2015-0023.

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Abstract The paper presents the results of investigations concerning the influence of negative (relative) pressure in the die cavity of high pressure die casting machine on the porosity of castings made of AlSi9Cu3 alloy. Examinations were carried out for the VertaCast cold chamber vertical pressure die casting machine equipped with a vacuum system. Experiments were performed for three values of the applied gauge pressure: -0.3 bar, -0.5 bar, and -0.7 bar, at constant values of other technological parameters, selected during the formerly carried initial experiments. Porosity of castings was as

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26

Pammer, Maria, Peter Hofer-Hauser, and Per Jansson. "Venting Systems in Semi-Solid Processing of Aluminium." Solid State Phenomena 348 (August 28, 2023): 15–20. http://dx.doi.org/10.4028/p-zjnj1p.

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In the automotive industry, casting products produced by high pressure die casting are essential. Due to the higher mechanical demands on these castings, the technological requirements of the process are also increasing. Therefore, the control of the microstructure and the development of defects play a major role. High pressure die casting parts made of aluminium usually contain gas porosity due to gas compression during the filling process of the cavity and the intensification during solidification. The use of semi-solid casting thus opens new doors to fulfil promising future demands. In this

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27

Liu, Mengyun, Zhan Zhang, Francis Breton, and X. Grant Chen. "Investigation of the Quench Sensitivity of an AlSi10Mg Alloy in Permanent Mold and High-Pressure Vacuum Die Castings." Materials 12, no. 11 (2019): 1876. http://dx.doi.org/10.3390/ma12111876.

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The quench sensitivities of an AlSi10Mg alloy in permanent mold (PM) and high-pressure vacuum die (HPVD) castings were investigated with time–temperature–transformation and time–temperature–property diagrams using an interrupted quench technique. The quench-sensitive temperature range of the HPVD casting sample is 275–450 °C, and its nose temperature is 375 °C. The quench-sensitive range of the PM casting sample is 255–430 °C, and the nose temperature is 350 °C. The mechanical strength versus the cooling rate in both casting samples were predicted via a quench factor analysis and verified expe

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Szalva, Péter, and Imre Norbert Orbulov. "Influence of Vacuum Support on the Fatigue Life of AlSi9Cu3(Fe) Aluminum Alloy Die Castings." Journal of Materials Engineering and Performance 29, no. 9 (2020): 5685–95. http://dx.doi.org/10.1007/s11665-020-05050-y.

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Abstract High-pressure die casting (HPDC) is a near-net-shape process that produces high quality castings with narrow dimensional tolerances. The HPDC castings are being increasingly used due to good flexibility and high productivity, especially for the automotive industry. Depending on the location of the cast components, there are ever more complex geometries and increasing strength requirements that can be achieved by the application of vacuum-assisted die casting (VPDC). The most specific features of the HPDC process are the rapid mold filling, high cooling rate and intensification pressur

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Ignaszak, Zenon, and Jakub Hajkowski. "Gas- and Shrinkage Porosities in Al-Si High-Pressure Die-Castings - Virtualization and Experimental Validation." Defect and Diffusion Forum 364 (June 2015): 80–91. http://dx.doi.org/10.4028/www.scientific.net/ddf.364.80.

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The porosity (void caused by technological reasons) in engineering materials always decrease their mechanical characteristics and usually affects the deterioration of the functional mechanical characteristics of the finished products. In the castings the porosity resulting from the specific casting processes phenomena occurs inevitably in the matrix structure. The paper shows this problem in relation to the High-Pressure-Die-Casting (HPDC) technology of Al-Si alloy. The analysis of the experimental results and the results from virtualization of HPDC process allowed to assess the effectiveness

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30

Mao, Hong Kui, Bin Ye Yao, and Hong Xu. "Casting Filling Simulation Technology Based on Component Wise Splitting Method." Applied Mechanics and Materials 395-396 (September 2013): 1199–205. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.1199.

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The casting filling numerical simulation technology is of great significance to optimize the casting process, improve castings quality, and reduce production costs. Component wise splitting method only uses a small amount of iterations between velocity field and pressure field, so it has high computational efficiency in theory. The calculation accuracy is analyzed through Lid-driven cavity flow model, the result has a good agreement with literature results in low Reynolds number, but there is a big deviation when high Reynolds number. Finally the fraction step method is applied to the solution

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31

Yang, Xiang Jie, Yi He, Yong Bo Zhu, et al. "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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Sadayappan, K., W. Kasprzak, Zach Brown, L. Quimet, and Alan A. Luo. "Characterization of Magnesium Automotive Components Produced by Super-Vacuum Die Casting Process." Materials Science Forum 618-619 (April 2009): 381–86. http://dx.doi.org/10.4028/www.scientific.net/msf.618-619.381.

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Magnesium automotive components are currently produced by high pressure die casting. These castings cannot be heat-treated to improve the strength and ductility mainly due to the casting imperfections such as porosity and inclusions created by the air entrainment during the turbulent mold filing. These imperfections also prevent magnesium components to be used for highly stressed body components. Efforts were made to produce high integrity magnesium castings through a Super-Vacuum Die Casting process. The AZ91D castings were found to have very low porosity and can be heat-treated without blist

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33

Ji, Shou Xun, Feng Yan, and Zhong Yun Fan. "Casting Development with a High Strength Aluminium Alloy." Materials Science Forum 828-829 (August 2015): 9–14. http://dx.doi.org/10.4028/www.scientific.net/msf.828-829.9.

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In the present paper, we introduce the development of casting an industrial component with a newly developed high strength aluminium alloy for high pressure die casting, including the introduction of property requirement, and the simulation results of temperature distribution, air entrapment, air pressure and the porosity potential in the casting, overflows and gating system. The microstructure and mechanical properties of the casting with satisfied quality are described under as-cast and heat-treated conditions.

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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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35

Zeng, Jian Min, and Yao He Zhou. "A New Sand Casting Process with Accelerated Solidification Rate." Materials Science Forum 686 (June 2011): 765–69. http://dx.doi.org/10.4028/www.scientific.net/msf.686.765.

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In order to solve the problems involved in coarse grains, macro and micro porosities initiated by low solidification rate in sand casting, an innovative counter-gravity sand casting process, Casing under Adjustable Pressure with Accelerated Solidification (CAPAS) was put forward in this paper. The hydrodynamics of mold filling for CAPAS is based on Bernoulli's principle. The mold and crucible were placed separately in the upper and lower chambers, with the feed tube connected between them. High-speed jet flow of air made negative pressure in the upper chamber. In this way, pressure differentia

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Santos, Jorge, Anders E. W. Jarfors, and Arne K. Dahle. "Filling, Feeding and Defect Formation of Thick-Walled AlSi7Mg0.3 Semi-Solid Castings." Solid State Phenomena 256 (September 2016): 222–27. http://dx.doi.org/10.4028/www.scientific.net/ssp.256.222.

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Aluminium semi-solid castings have gained increased attention due to their superior mechanical properties, lower porosity compared to conventional high pressure die cast material. These characteristics suggests that semi-solid casting should be suitable to produce thick-walled structural components, yet most successful applications of semisolid casting have been for thin-walled components. There is a lack of understanding on filling and feeding related defect formation for semi-solid castings with thick-walled cross-sections. In the current study an AlSi7Mg0.3 aluminium alloy was used to produ

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37

Galitu, Eugen Madalin, and George Constantin. "Increasing Performances in High Pressure Casting Process of Aluminium Alloys." Applied Mechanics and Materials 811 (November 2015): 63–74. http://dx.doi.org/10.4028/www.scientific.net/amm.811.63.

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The purpose of this paper is to present the influence of the casting parameters in the process of producing aluminium alloy components of gearbox housing type in automotive industry. The project has as objectives the minimization of the most common casting defects met in casting of gearbox housings through adjusting the parameters of the process. In order to minimize these defects, it was studied the casting speeds in phases I and II, multiplication pressure of phase III and the mould temperature that is influenced by both the cooling channels inside the mould and the spraying process of the m

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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 (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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Jia, Zhi Xin, Ning Bo Hu, Ji Qiang Li, Li Jun Liu, and Li Qiong Chen. "Die-Casting Die Design Based on the Application of CAE Simulation." Applied Mechanics and Materials 201-202 (October 2012): 541–44. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.541.

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High pressure die casting is a high volume component manufacturing process which is used extensively in many aspects. There are many factors affecting the quality of die-casting die. In this paper, the CAE simulations of filling and solidification processes for die-casting are studied. Numerical analyses are presented for two practical die-casting parts using HZ CAE software. The temperature distributions and filling states in solidification and filling process are presented. Then the deficiencies of the part are predicted. Based on the analyzing results, the structures of the two dies are opt

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Lumley, Roger N., and J. R. Griffiths. "Fatigue Resistance of Heat Treated Aluminium High Pressure Die-Castings." Advanced Materials Research 41-42 (April 2008): 99–104. http://dx.doi.org/10.4028/www.scientific.net/amr.41-42.99.

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High pressure die-casting (HPDC) is widely used as a cost-effective way to massproduce metal components that are required to have close dimensional tolerances and smooth surface finishes. Approximately 50%, by mass, of the aluminium castings produced worldwide are made by this manufacturing route. However, HPDC components are relatively porous compared with other types of castings and so cannot usually be conventionally heat treated to improve mechanical properties. This follows because during solution treatment (e.g. at 540°C for 8h), the pores expand, resulting in unacceptable surface bliste

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Battaglia, Eleonora, Franco Bonollo, Elena Fiorese, and Giorgio Kral. "Overview of the Correlations between Process Parameters, Microstructure and Mechanical Properties of Reference Castings and Industrial Demonstrators." Key Engineering Materials 710 (September 2016): 35–40. http://dx.doi.org/10.4028/www.scientific.net/kem.710.35.

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Among the Aluminum casting processes, High Pressure Die Casting (HPDC) is an efficient, versatile and economic way for producing large number of components. Nevertheless, because of the elevated amount of rejected castings, it is important to know which are the main causes of defect formation and their effects on microstructure and mechanical properties. This paper presents, within the European MUSIC project, an overview of the preliminary correlations obtained studying both castings with defect generator geometry, referred to as Horse-shoe Reference Castings, and industrial demonstrators, ref

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Brzeziński, Marcin, Jakub Wiśniowski, Mariusz Łucarz, Karolina Kaczmarska, Alena Pribulová, and Peter Futáš. "Prediction of the Stability of the Casting Process by the HPDC Method on the Basis of Knowledge Obtained by Data Mining Techniques." Materials 17, no. 23 (2024): 5935. https://doi.org/10.3390/ma17235935.

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High-pressure die casting (HPDC) of aluminum alloys is one of the most efficient manufacturing methods, offering high repeatability and the ability to produce highly complex castings. The cast parts are characterized by good surface quality, high dimensional accuracy, and high tensile strength. Continuous technological advancements are driving the increase in part complexity and quality requirements. Numerous parameters impact the quality of a casting in the HPDC process. The most commonly controlled parameters include plunger velocity in the first and second phases, switching point, and inten

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Tatiana Lysenko, Yuriy Morozov, Kyryll Kreitser, and Evgeny Kozishkurt. "USING THE SPH METHOD FOR MODELING THE CRYSTALLIZATION PROCESS OF ALUMINUM ALLOYS." World Science 1, no. 3(55) (2020): 26–33. http://dx.doi.org/10.31435/rsglobal_ws/31032020/6981.

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   The purpose of the study was to obtain castings with increased mechanical properties by low-pressure casting using excess pressure on the crystallized casting. The simulation of the process of filling and crystallization of prototypes using the SPH method was carried out. The studies were carried out on a modernized low-pressure injection molding machine model U8261. Prototypes were obtained from AK7ch alloy, special attention is paid to interfacial interaction and intensification of the heat transfer process due to the application of excess pressure. Based on the data obt

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Dubják, Ján, Ján Piteľ, and Mária Tóthová. "Diagnostics of Aluminum Alloys Melting Temperature in High Pressure Casting." Key Engineering Materials 669 (October 2015): 110–17. http://dx.doi.org/10.4028/www.scientific.net/kem.669.110.

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The high pressure casting process is a well-established way for the manufacture of non-ferrous components. Temperature is important technological parameter of production that affects the structure and quality of castings. Using continual exact measurement of alloy temperature is the best approach for predicting structures quality problems.Temperature measurement system also would help to acquire feedback from the manufacturing process so as to prevent possible defects in next phases of manufacturing. For this measurement we used thermocouple type „K“ in protective tube from graphite. It is nec

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Hartlieb, Martin, Jean Claude Tawil, Stephane Bergeron, and Per Jansson. "Producing Structural High Integrity Castings with Minimum Carbon Footprint with the Comptech-Rheocasting Process." Solid State Phenomena 348 (August 28, 2023): 83–88. http://dx.doi.org/10.4028/p-lifpw2.

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Structural high vacuum die casting has been growing significantly over the past decades. It is typically done with special (primary type) alloys, special melt treatment practices, high vacuum, a carefully engineered die casting process applying many best practices in our industry. Structural die castings are growing in size and complexity and die casting machines are getting bigger and bigger - and those castings are becoming a significant challenge with current technologies. It was now found that Rheocasting - a process of preparing a semi-solid slurry (with 30-45% solid fraction) that is inj

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Ignaszak, Z., and J. Hajkowski. "Contribution to the Identification of Porosity Type in AlSiCu High-Pressure-Die-Castings by Experimental and Virtual Way." Archives of Foundry Engineering 15, no. 1 (2015): 143–51. http://dx.doi.org/10.1515/afe-2015-0026.

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Abstract The paper concerns the problem of discontinuity in high pressure die castings (HPDC). The compactness of their structure is not perfect, as it is sometimes believed. The discontinuities present in these castings are the porosity as follow: shrinkage and gas (hydrogen and gas-air occlusions) origin. The mixed gas and shrinkage nature of porosity makes it difficult to identify and indicate the dominant source. The selected parameters of metallurgical quality of AlSi9Cu3 alloy before and after refining and the gravity castings samples (as DI - density index method), were tested and evalu

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Podprocká, Radka, Jozef Malik, and Dana Bolibruchová. "Defects in High Pressure Die Casting Process." Manufacturing Technology 15, no. 4 (2015): 674–78. http://dx.doi.org/10.21062/ujep/x.2015/a/1213-2489/mt/15/4/674.

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Hey, A. W., A. Bresciani, L. A. Correia, Rodrigo Moreno, and Arturo Salomoni. "Industrial Pressure Casting of High Alumina Ceramics." Key Engineering Materials 132-136 (April 1997): 350–53. http://dx.doi.org/10.4028/www.scientific.net/kem.132-136.350.

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Otarawanna, S., C. M. Gourlay, H. I. Laukli, and A. K. Dahle. "Microstructure formation in high pressure die casting." Transactions of the Indian Institute of Metals 62, no. 4-5 (2009): 499–503. http://dx.doi.org/10.1007/s12666-009-0081-2.

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Molnár, Dániel, Jenő Dúl, and Richárd Szabó. "Simulation of High Pressure Die Casting Solidification." Materials Science Forum 508 (March 2006): 555–60. http://dx.doi.org/10.4028/www.scientific.net/msf.508.555.

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By the help of simulation software it is possible to follow and predict the high pressure die casting process. In the Department of Foundry Engineering at the University of Miskolc, Hungary we use both Finite Element- and Finite Difference programs for simulation. In this paper we examine a special specimen, a plate with knobs, witch has point symmetric hot spots and cored parts which effect the characteristic of flow and solidification. We examined the solidification process and the temperature distribution. We determined that the finite element method, because of the meshing and the calculat

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