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Journal articles on the topic 'Heat content; Capacity; Casting'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Kolokoltsev, V. M., A. S. Savinov, and A. S. Tuboltseva. "Prediction of Temperature Fields in the System “Casting and a Damp Sandy-Argillaceous Mold”." Solid State Phenomena 284 (October 2018): 640–46. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.640.

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The function of the equivalent heat capacity that takes into account the heat consumption for heating and evaporation of water in the layer of sand with initial moisture content 2 - 10% has been obtained in the work. The function found allows taking into consideration the temperature change of the specific heat capacity of silicon oxide of sandy - argillaceous molds (SAM) and can be applied in the numerical solution of the heat conduction problem by a finite difference method.

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2

Ramírez-López, Adán, Omar Dávila-Maldonado, Alfonso Nájera-Bastida, Rodolfo D. Morales, Jafeth Rodríguez-Ávila, and Carlos Rodrigo Muñiz-Valdés. "Analysis of Non-Symmetrical Heat Transfers during the Casting of Steel Billets and Slabs." Metals 11, no. 9 (2021): 1380. http://dx.doi.org/10.3390/met11091380.

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The current automation of steelmaking processes is capable of complete control through programmed hardware. However, many metallurgical and operating factors, such as heat transfer control, require further studies under industrial conditions. In this context, computer simulation has become a powerful tool for reproducing the effects of industrial constraints on heat transfer. This work reports a computational model to simulate heat removal from billets’ strands in the continuous casting process. This model deals with the non-symmetric cooling conditions of a billet caster. These cooling condit

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3

Krajewski, Paweł K., Grzegorz Piwowarski, and Witold K. Krajewski. "Determining Temperature Dependencies of Sand Mould Thermal Properties." Materials Science Forum 790-791 (May 2014): 452–57. http://dx.doi.org/10.4028/www.scientific.net/msf.790-791.452.

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The presented work is aimed at determining thermal diffusivity, thermal conductivity and heat capacity coefficients of silica quartz bentonite foundry sand. The values of the above thermo-physical properties were determined for temperature range of about 30 - 450 °C using theCasting measuring method[1-.The results obtained during the examinations presented in the paper can be useful when formulating boundary conditions in numerical models of heat and mass transfer in the system: casting mould ambient. TheCasting methodallows preserving real conditions during the experiment, i.e. contact of the

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4

Yahaya, Bashir, E. M. Nazim, Mohd Hasbullah Idris, M. S. Dambatta, Mahmood Anwar, and Sudin Izman. "Thermal Response of Activated Charcoal Modified Investment Casting Moulds." Advanced Materials Research 1125 (October 2015): 181–85. http://dx.doi.org/10.4028/www.scientific.net/amr.1125.181.

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Direct microwave dewaxing of investment casting moulds is possible at the expense of time and poor heat distribution. Modifying the back-up stucco of investment casting moulds may enhance microwave absorption; however, it may affect its thermal properties. In this study, the effects of adding activated charcoal in the back-up stucco of the investment casting mould were investigated. Samples prepared without and with 25% activated charcoal were tested for differential scanning calorimetry (DSC) and Thermogravimetric analysis (TGA). It was observed that the specific heat capacity is higher in th

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5

Suresh, R. "Development and Property Evaluation of Chilled MMC Prepared with LM25 as Matrix and SiO₂ (Glass) Particulates as Dispersoids." Advanced Materials Research 1101 (April 2015): 85–88. http://dx.doi.org/10.4028/www.scientific.net/amr.1101.85.

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Main objective of the present work is to investigate the effect of dispersiod content and the effect of chill on the mechanical properties of chilled MMC with LM25 as matrix and SiO2as dispersoid. Investigation is carried out to evaluate Ultimate Tensile Strength (UTS), Fracture toughness, Hardness, and microstructure of chilled aluminum matrix and Glass particulate composite. The glass (SiO2) particles ranging from 30-to100µm were chosen as dispersiod and added, ranging from 3to 12wt% in steps of 3%. The composite was prepared by stir-casting technique and poured into the sand molds incorpora

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6

Lekhov, O. S., A. V. Mikhalev, and M. M. Shevelev. "Production of three-layer steel bimetallic strips in the unit of continuous casting and deformation. Report 1." Izvestiya. Ferrous Metallurgy 62, no. 8 (2019): 594–99. http://dx.doi.org/10.17073/0368-0797-2019-8-594-599.

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High technical and economic efficiency of the use of bimetals in chemical, oil, transport and energy engineering and other industries is described. The urgency of creating high-performance continuous processes for the production of bimetallic strips is substantiated. The authors have established the main technological tasks for development of the processes of obtaining bimetal of wide class. The paper describes resource-saving production technology of three-layer bimetals alloyed steel – constructional steel – alloyed steel at the unit of combined process of continuous casting and deformation.

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7

Neagu-Cogălniceanu, Camelia. "Technique Achievement of Glass Objects Using Kiln Casting Method." Advanced Materials Research 837 (November 2013): 61–66. http://dx.doi.org/10.4028/www.scientific.net/amr.837.61.

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In the context of the competitive actual environment, the production need to adapt to the preferences of the consumers, this represents the essential goal for all manufacturers. The production flexibility can be achieved by designing and marketing of new products or/and modify existing products in short time and at low cost. The technique presented in these article addresses of manufacturers and designers who made glass products unique or small series, adapted to consumer demands. In recent decades, digital fabrication methods are developed in various fields (aeronautics, shipbuilding, automot

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8

Rejilin, D. R. Anand, R. Murugesan, and V. Bravin Ebanesh. "Flexural Performance of Geopolymer Concrete Modified with Pozzalonic Minerals and Secondary Reinforcement." Journal of Computational and Theoretical Nanoscience 15, no. 2 (2018): 459–69. http://dx.doi.org/10.1166/jctn.2018.7110.

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Concrete, the versatile building material is relevantly used for structural applications for its ease of application and in situ adaptability. Decline of raw materials, cost and environmental issues related to unsustainable usage of cement, persuades the construction industries for an alternate binder similar to cement. Geoploymer concrete known for its eco-friendly manufacturing process and economic approach makes the, GPC a viable substitute for cement concrete. At elevated temperature, GPC undergoes polymerisation reaction and develops three dimensional amorphous components which exhibits e

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9

Hampl, M., J. Leitner, K. Růžička, M. Straka, and P. Svoboda. "Heat capacity and heat content of BiNb5O14." Journal of Thermal Analysis and Calorimetry 87, no. 2 (2006): 553–56. http://dx.doi.org/10.1007/s10973-006-7732-x.

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10

Amin, M. Ruhul. "Thermal Analysis During Continuous Casting Process Using Effective Heat Capacity Method." Journal of Thermophysics and Heat Transfer 14, no. 2 (2000): 170–76. http://dx.doi.org/10.2514/2.6528.

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11

Jacob, K. T., G. Rajitha, G. M. Kale, A. Watson, and Z. Wang. "High-temperature heat capacity and heat content of CaCu3Ti4O12 (CCTO)." Journal of Alloys and Compounds 488, no. 1 (2009): 35–38. http://dx.doi.org/10.1016/j.jallcom.2009.09.010.

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12

Moon, B. M., Bong Hwan Kim, Je Sik Shin, and Sang Mok Lee. "Permanent Mold Casting Practice and Microstructure and Mechanical Properties of Thin-Sectioned ADI Casting." Advanced Materials Research 26-28 (October 2007): 531–34. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.531.

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For thin-walled casting development of austempered ductile iron (ADI), permanent mold casting and accompanied heat treatment practice were systematically investigated to suppress and/or remove chill defects of ductile cast iron (DCI) with various thickness of 2 to 9 mm and to ensure mechanical properties of the final ADI casting. Si content was increased up to 3.8% to reduce the chill formation tendency under a high cooling rate. The residual Mg content remarkably affected the nodule count, while the nodule size and spherodization were proven to have weak relationships. Austenitizing process f

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13

DeTar, DeLos F. "Theoretical ab Initio Calculation of Entropy, Heat Capacity, and Heat Content." Journal of Physical Chemistry A 102, no. 26 (1998): 5128–41. http://dx.doi.org/10.1021/jp981195o.

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14

Korti, Abdel Illah Nabil, and Yahia Khadraoui. "A numerical simulation of the DC continuous casting using average heat capacity." Scandinavian Journal of Metallurgy 33, no. 6 (2004): 347–54. http://dx.doi.org/10.1111/j.1600-0692.2004.00705.x.

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15

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 (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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16

Zhao, Zhong, and Zi Tian Fan. "Influence of Vibration on the Heat Transfer of Lost Foam Casting Filling." Advanced Materials Research 418-420 (December 2011): 1618–21. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1618.

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The vibration is superimposed to the filling process of aluminum and magnesium alloy in lost foam casting, and the flow lengths and the molten metal temperatures of the flow front are collected, and they compared with no-vibration. The results show that the vibration can significantly improve the filling capacity of the aluminum alloy, magnesium alloy in lost foam casting. Compared to the samples without vibration, the flow lengths of A356 alloy with vibration in lost foam casting increased by 33% and that of AZ91D alloy increased by 15%.The heat transfer of molten metal on the flow front was

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17

Yang, Shie Chen, Tsuo Fei Mao, Tzer Ming Jeng, et al. "A Study of Heat Transfer Characteristics of LED Heat Sink and Graphite Heat Sink Process Technology Development." Applied Mechanics and Materials 284-287 (January 2013): 819–23. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.819.

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This study investigated the heat transfer characteristics of LED heat sink and the development process technology of graphite heat sink with micro-sized metal powders. Employing the reverse engineering technology, the three-dimension LED heat sink entity was rebuilt and the heat transfer characteristics of LED heat sink were analyzed by CFD numerical simulation and experimental measurement. The numerical results were validated with experimental results and it showed a good agreement. The experimental and simulation results showed that the heat dissipation of LED device could be removed by natu

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18

FABER, P., and L. GARBY. "Fat content affects heat capacity: a study in mice." Acta Physiologica Scandinavica 153, no. 2 (1995): 185–87. http://dx.doi.org/10.1111/j.1748-1716.1995.tb09850.x.

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19

Dević, Snezana, and R. Carli. "Effect of Wolastonite Mineral (CaO SiO₂) Content in Continuous Casting Powder to SEN Erosion." Key Engineering Materials 352 (August 2007): 107–10. http://dx.doi.org/10.4028/www.scientific.net/kem.352.107.

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The basic idea of the work was to analyze the effect of the wollastonite mineral CaO SiO2 content in the continuous casting powder related to the SEN erosion. In order to realize the research, experiments were conducted in the laboratory conditions. The research, experiment, was realized in the Magnohrom Kraljevo laboratory, and cryptonym furnace EV16 was used for refractory material behavior. Cut SEN pieces from the slag zone in the reduction atmosphere were treated in the furnace with three types of casting powder of different mixtures ratio of SRD1 (without wollastonite) and SRD2 (with woll

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20

Abu-Hamdeh, Nidal H. "Specific Heat and Volumetric Heat Capacity of Granular Materials as Affected by Moisture and Density." Applied Mechanics and Materials 575 (June 2014): 103–7. http://dx.doi.org/10.4028/www.scientific.net/amm.575.103.

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The granular materials examined in this study were some Saudian soils. The effect of water content and bulk density on the specific heat and volumetric heat capacity of two Saudian soils (sand and loam) was investigated through laboratory studies. These laboratory experiments used the calorimetric method to determine specific heat of soils. For the type of soils studied, specific heat increased with increased moisture content. Also, volumetric heat capacity increased with increased moisture content and soil density. The volumetric heat capacity and specific heat of soils observed were compared

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21

Watari, Hisaki, Yoshimasa Nishio, Ryoji Nakamura, Keith Davey, and Nobuhio Koga. "Microstructure and Mechanical Properties of High Aluminum Content Magnesium Alloys Fabricated by Twin-Roll Casting Process." Materials Science Forum 638-642 (January 2010): 1608–13. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1608.

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This paper describes the twin roll casting technology of magnesium alloys that contains relatively high weight ratio of aluminum, such as AM60, AZ91 and AZ121. The cast magnesium alloy sheets were hot-rolled in an elevated temperature to investigate the appropriate hot-rolling conditions for producing high-quality strip using a purpose-built strip-casting mill. The influences of such process parameters as materials of roll, casting temperature, and roll speed are ascertained. A simple method of predicting the convection heat transfer coefficient between casting rolls and molten metal is introd

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22

Karthikeyan, B., S. Ramanathan, and V. Ramakrishnan. "Specific Heat Capacity Measurement of Al / SiC_p Composites by Differential Scanning Calorimeter." Advanced Materials Research 264-265 (June 2011): 669–74. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.669.

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Various materials are used to achieve a good “Thermal Control System” (TCS) of spacecraft. The performance of the TCS totally depends upon the thermal behaviour of the materials used in the elements of TCS. The measurements of the thermal properties of materials are fundamental for better understanding of the thermal design. Differential Scanning Calorimetry (DSC) is the most widely used thermal technique for obtaining a wealth of information about a material, especially for the specific heat measurement of a material. Stir casting technique was used to fabricate the 7075 aluminum alloy and 70

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23

Li, Hui Rong, Li Gen Sun, and Li Qun Ai. "The Mould Flux Heat Conduction Performance Designing of High Carbon Steel for Thin Slab Continuous Casting." Advanced Materials Research 1033-1034 (October 2014): 1313–16. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.1313.

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Heat transfer of the mould flux between the mould and the strand is very complicated, especially for the high carbon steel thin slab continuous casting. In this research the orthogonal experiment has been carried out, and the results showed that: the effect for the heat flux form strong to weak is: R>Na2O>F>MgO>BaO. and in the experiment range, with the R increasing, when the R, Na2O content and the F- content are increasing, the heat flux would be decreasing; with the MgO content increasing, the crystallization temperature would getting fluctuant; with the BaO content increasing,

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24

Möller, Heinrich, Gonasagren Govender, and Waldo Stumpf. "Comparison of the Heat Treatment Response of SSM-HPDC 6082 and 6004 Wrought Alloys with A356 and F357 Casting Alloys." Materials Science Forum 690 (June 2011): 53–56. http://dx.doi.org/10.4028/www.scientific.net/msf.690.53.

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Semi-solid metal high pressure die casting was used to produce plates from traditional wrought Al-Mg-Si alloys 6082 and 6004, as well as from traditional casting Al-Si-Mg alloys A356 and F357. The high Si-content of the casting alloys offer several advantages, including a faster artificial aging response, higher strength for comparable Mg contents and less sensitivity to prior natural aging on peak strength. However, over-aging occurs earlier in the casting alloys than in the wrought alloys.

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25

Liu, Li Jun, Zhi Wen, Fu Yong Su, Rui Feng Dou, Xun Liang Liu, and Guo Feng Lou. "Research and Application of Integrated Scheduling Management System of Steelmaking-Casting-Rolling Based on Heat Process Model." Advanced Materials Research 760-762 (September 2013): 1017–22. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.1017.

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by studying steelmaking-casting-rolling production process, a mathematical model of integrated batch planning is established innovatively to minimize processing costs of whole line and computed by an intelligent optimization ant algorithm. On the premise of utilizing and coordinating capacity of steelmaking and rolling, the mathematical model of integrated batch planning can create integrated batch planning to combine steelmaking-casting-rolling closely according to each process constraint conditions and optimization objective. Furthermore, another mathematical model of job scheduling based on

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26

Zhao, Wenhui, Qian Su, Feng Han, and Wubin Wang. "Study on the Heat of Hydration and Strength Development of Cast-In-Situ Foamed Concrete." Advances in Materials Science and Engineering 2020 (April 8, 2020): 1–12. http://dx.doi.org/10.1155/2020/9061819.

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This study aims to investigate the relationship between the heat of hydration and the strength development of cast-in-situ foamed concrete. First, indoor model tests are conducted to determine the effects of the casting density and the fly ash content on the hydration heat of foamed concrete in semiadiabatic conditions. Second, compression tests are carried out to evaluate the development of the compressive strength with the curing time under standard curing conditions and temperature matched curing conditions. Third, the hydration heat development of the foamed concrete is tested in four proj

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27

Sun, Zehui, Guoli Li, Zhe Qian, Weifei Li, and Jian Jing. "Lumped-Capacity Method for Easy Estimation of Interfacial Heat Transfer Coefficients in Die Casting." International Journal of Materials, Mechanics and Manufacturing 8, no. 3 (2020): 104–8. http://dx.doi.org/10.18178/ijmmm.2020.8.3.492.

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28

Chen, Hai Feng, and Feng Cao. "The Research and Application of Nuclear Power Valve Steel Casting by CAD / CAE Simulation Design and Refining Technology." Key Engineering Materials 480-481 (June 2011): 1293–97. http://dx.doi.org/10.4028/www.scientific.net/kem.480-481.1293.

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With China cast CAE / InteCAST, we analyzed the ordinary valve casting parameters of solidification process, flow and heat transfer, and frequency smelting refining furnace used in the process of feeding wire, argon technology in the intermediate. Comparison-ray testing and physical anatomy of the results, we developed nuclear power valve steel casting process parameters. The results showed that the software forecast casting the shrinkage tendency of value; frequency smelting refining controlled sulfur, phosphorus and aluminum content; products fully comply with the ASTM A216/A216M overcome ho

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29

Yang, Jie, Dengfu Chen, Mujun Long, and Huamei Duan. "An Approach for Modelling Slag Infiltration and Heat Transfer in Continuous Casting Mold for High Mn–High Al Steel." Metals 10, no. 1 (2019): 51. http://dx.doi.org/10.3390/met10010051.

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To clarify the characteristics of slag infiltration and heat transfer behaviors in the meniscus region during the casting of high Mn–high Al steel, a mathematical model of a continuous casting mold that couples fluid flow with heat transfer, and solidification is developed. The model is based on the change in slag composition and properties caused by the steel/slag reaction. The formation and evolution of the meniscus profile and slag films for different mold fluxes during mold oscillation are described. The results show that the rapid growth of the slag rim with a high Al2O3 content approache

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30

Zheng, Qingchun, Yinhong Xiao, Tao Zhang, Peihao Zhu, Wenpeng Ma, and Jingna Liu. "Numerical Simulation of Latent Heat of Solidification for Low Pressure Casting of Aluminum Alloy Wheels." Metals 10, no. 8 (2020): 1024. http://dx.doi.org/10.3390/met10081024.

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In this paper, aiming at focusses on many problems existing in the mathematical model of temperature change in the low-pressure casting solidification process of aluminum alloy wheel hub, there is a big gap between the simulation and the actual temperature change, which affects the research on the solidification defects of the wheel hub. In order to study the solidification behavior of aluminum alloy hub in low-pressure casting process, the mathematical model describing the temperature change in the process of casting solidification is established by using different solidification latent heat

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31

Demidenko, L. L. "Simulation of Power Efficient Cooling Technology for Continuously Cast Bars." Solid State Phenomena 265 (September 2017): 1086–91. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.1086.

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The article describes a power efficient technology, allowing to preserve and maintain the heat content in a continuously cast bar at the production line “Continuous Casting Machine – Rolling Mill”. It considers a possibility of obtaining the maximum heat content in the continuously cast bar by means of rational cooling schedules in the secondary cooling zone. In order to maintain the achieved heat content in the bar, it is proposed to utilize heat insulation of the bar in the air cooling zone prior to its cutting-to-length. The article describes the design of the heat insulating shell in the C

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32

Watari, Hisaki, Yoshimasa Nishio, Ryoji Nakamura, Keith Davey, and Nobuhio Koga. "Effect of Aluminum Content on Mechanical Properties of Cast Magnesium Alloy Sheets Fabricated by Twin-Roll Casting." Advanced Materials Research 97-101 (March 2010): 1077–80. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1077.

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This paper describes the twin-roll casting technology of magnesium alloys that contain relatively high weight ratios of aluminum, such as AM60, AZ91 and AZ121. The magnesium alloy sheets were cast by a vertical roll caster to manufacture relatively high-strength Mg alloys with high aluminum content. The influences of such process parameters as roll materials, casting temperature, and roll speed were ascertained. A simple method of predicting the convection heat transfer coefficient between casting rolls and molten metal is introduced. The microstructures of cast magnesium alloy sheets are micr

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33

Wang, Qing Bo, Yan Min Jia, and Dong Po He. "Finite Element Analysis for Refrozen Process of Bored Pile in Permafrost Region." Advanced Materials Research 243-249 (May 2011): 1655–58. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1655.

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The commercially available finite element program ANSYS was used to model the refrozen process of the bored pile. The effects of the refrozen process by casting temperature of concrete, heat of concrete hydration and air convention were analyzed. To estimate the time when the bearing capacity of the bored pile is formed, the finish time of refrozen process was determined by modeling the whole refrozen process of the bored pile. The calculated results are in good agreement with experimental data. The analysis shows that the refrozen process is related with the casting temperature of concrete. T

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34

Asoiro, FU, and CJ Ohagwu. "SOME MOISTURE DEPENDENT THERMAL PROPERTIES AND BULK DENSITY OF Prosopis Africana SEEDS (OKPEYE)." Nigerian Journal of Technology 36, no. 3 (2017): 936–43. http://dx.doi.org/10.4314/njt.v36i3.38.

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The thermal heat conductivity, specific heat capacity, thermal heat diffusivity and bulk density of Prosopis africana seeds were determined as a function of moisture content. Specific heat capacity was measured by the method of mixture while the thermal heat conductivity was measured by the guarded hot plate method. Thermal heat diffusivity was calculated from the experimental results obtained from specific heat capacity, thermal heat conductivity and bulk density. The bulk density for Prosopis africana (PA) seeds decreased from 890kg m-3 to 590kg m-3 as moisture content increased from 4 to 20

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35

Long, Ji Bo, Ping Wang, Yu Lou Li, and Si Yi Huang. "Analysis on Heat Transfer Intensity of Bamboo Structure Wall in Warm and Humid Environment." Advanced Materials Research 639-640 (January 2013): 721–26. http://dx.doi.org/10.4028/www.scientific.net/amr.639-640.721.

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Based on the fundamentals of heat and moisture transfer in porous media, characteristics of heat transfer intensity of a bamboo structure wall are analyzed when the moisture content changes under the action of natural warm and humid environment. The results show that: when the moisture content changes, the effective coefficient of heat conductivity and specific heat capacity of bamboo both change, and physical parameters (e.g., heat transfer capacity, heat storage capacity, temperature distribution, attenuation coefficient of temperature wave, delay coefficient of temperature wave) all change

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36

RAHARDJO, MONO, and IRENG DARWATI. "PENGARUH CEKAMAN AIR TERHADAP PRODUKSI DAN MUTU SIMPLISIA TEMPUYUNG (Sonchus arvensis L.)." Jurnal Penelitian Tanaman Industri 6, no. 3 (2020): 73. http://dx.doi.org/10.21082/jlittri.v6n3.2000.73-79.

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<p><strong>Effect of water stress on the production and quality of Sonchus arvensis L.</strong></p><p>Study on water stress in Sonchus arvensis L was conducted to improve the quality and production of leaves. Pot experiment was conducted at geen house Bogor Research Institute for Spice and Medicinal Crops from July to November 1996, with 7 kg latosol dry soil of Cimanggu Bogor per pot. Randomized block design with four replications were used. Eight treatments of water stess and casting were applied i.e. (I) 100% field capacity (FC) no casting, (2) 100% FC + castin

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37

Xu, Zheng Bin, Yong Zhi Zou, Hong Gu, and Jian Min Zeng. "Investigations on Hydrogen Content Change in Melt Aluminum during Casting under Adjusted Pressure." Key Engineering Materials 353-358 (September 2007): 3059–62. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.3059.

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In this paper, a new low-pressure die-casting with degassing function, casting under adjusted pressure (CAP), is proposed. The working principle of CAP process is introduced in details. This paper focuses on the influences of moisture of compressed air on the hydrogen content within the melt aluminum during the cyclic vacuum-pressurizing programs for CAP process. The experimental results indicate that degassing under vacuum acts positive in refining aluminum melt. The relative moisture of compressed air exerts a significant influence on the hydrogen content of aluminum melt. After the melt alu

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38

Krajewski, P. K., J. S. Suchy, G. Piwowarski, and W. K. Krajewski. "High Temperature Thermal Properties of Bentonite Foundry Sand." Archives of Foundry Engineering 15, no. 2 (2015): 47–50. http://dx.doi.org/10.1515/afe-2015-0036.

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Abstract The paper presents results of measuring thermal conductivity and heat capacity of bentonite foundry sand in temperature range ambient - 900°C. During the experiments a technical purity Cu plate was cast into the green-sand moulds. Basing on measurements of the mould temperature field during the solidification of the casting, the temperature relationships of the measured properties were evaluated. It was confirmed that water vaporization strongly influences thermal conductivity of the moulding sand in the first period of the mould heating by the poured casting.

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39

Cholewa, M., and Ł. Kozakiewicz. "Heat Flow in the Casting – Mould System for Moulds with Gypsum and Cement Binder." Archives of Foundry Engineering 15, no. 2 (2015): 5–8. http://dx.doi.org/10.1515/afe-2015-0027.

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Abstract The production of thin-walled castings with wall thickness in the range of 1.5 to 3 mm and below requires the development of insulation moulding sands and/or core materials. The test has been taken to develop these kind of materials. The study included a description of their thermophysical properties. Authors described problems related to the heat flow in the casting-mould system, i.e. mathematically described the main dependence of heat give-up during crystallization of the casting. The influence of the content of polyglicol on the thermophysical properties of the mould with gypsum a

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Akimov, O. V., A. P. Marchenko, V. I. Alyokhin, et al. "Computer Engineering and Design of Cast Parts for Internal Combustion Engine Crankcase." Journal of Engineering Sciences 6, no. 2 (2019): e24-e30. http://dx.doi.org/10.21272/jes.2019.6(2).e4.

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This paper discusses the formulation of the problem of designing the cast parts block-crankcases engine in order to ensure its quality for the case study of cast iron parts of the cylinder block inline four-cylinder gasoline engine with the capacity of 1.4 dm3. Material Ch190B is gray cast iron with optional chemical composition, and sulfur – no more than 0.15 %, phosphorus – no more than 0.1 %, structure – perlite plate. The results obtained in this work confirm the conclusions about the possibility of reducing the metal content of the casting and changing the technical conditions of its manu

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Steinberg, Susan L., Gerard J. Kluitenberg, and Soheni Tanzeema. "Roots Affect the Accuracy of Dual-probe Heat-pulse Method for Measuring Water Content in Plant Growth Media." HortScience 41, no. 4 (2006): 970E—971. http://dx.doi.org/10.21273/hortsci.41.4.970e.

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Little attention has been paid to how the presence of roots influences water content measurements obtained with water content sensors. This issue is especially important if sensors are deployed in densely rooted soil or growth media. This work addresses the impact of roots on water content measurements obtained with dual-probe heat-pulse (DPHP) sensors. In the DPHP method, the maximum temperature rise in response to heating (Tmax) is used to calculate volumetric heat capacity, which in turn is used to calculate volumetric water content. The accuracy of DPHP sensors was evaluated in unrooted an

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Kang, Suk Bong, Dong Bae Kim, and Jae Hyung Cho. "Effect of Copper Variation and Thermomechanical Treatment on Microstructure and Properties in Aluminum Alloy Fin Stock for Heat Exchanger." Materials Science Forum 706-709 (January 2012): 311–16. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.311.

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Aluminum alloys are commonly used as a material for heat exchangers due to their higher thermal conductivity and specific strength among various metallic materials. Twin roll strip casting process is considered to produce the high quality and low manufacturing cost aluminum alloy fin stock for automobile heat exchangers. Thermomechamical treatment has carried out to obtain optimum processes for initial cold rolling, intermediate annealing and final cold rolling, which can meet the requirements for high strength and high thermal conductivity after brazing heat treatment. Additionally the effect

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Wang, Feng, Zhi Wang, Zheng Liu, and Ping Li Mao. "Study on Microstructures and Mechanical Properties of Die Casting Mg-xGd-3Y-0.5Zr Alloys." Advanced Materials Research 690-693 (May 2013): 44–48. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.44.

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In this paper, developed a non-aluminum die casting magnesium alloys were studied based on Mg-xGd-Y-Zr（x=6, 8, 12 wt.%）alloys in cold chamber press. The microstructures and mechanical properties of die casting GWK alloys have been investigated using OM, SEM, XRD, EDS and mechanical property test. The experimental results show that with increasing Gd content of Mg-xGd-Y-Zr alloys, the tensile strength increase, but elongation decrease. In particular, die casting GWK alloys after short-term and low-temperature solid solution treatment (T4) have a small variation in grain size and more uniform mi

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Anthony, Anyanwu Ifeanyi, Atsuya Suzuki, Shigeharu Kamado, and Yo Kojima. "Optimization of Mg-Zn-Al-Ca-La Alloys for the Improvement of Casting Properties and Creep Resistance." Materials Science Forum 488-489 (July 2005): 805–10. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.805.

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Mg-0.5%Zn-4%Al-0.5~2.0%Ca-0.5~2.0%La alloys are investigated in order to determine the optimum composition with superior casting properties and excellent creep resistance for automatic transmission case applications. The results show that regardless of the La content, the hot-tearing susceptibility of alloys containing 0.8%Ca or more is low. However, at 0.5%Ca content, hot-tearing occurs in alloys containing more than 1.2%La. The creep resistance of the alloys increases as the Ca content increases and Mg-0.5%Zn-4%Al-0.9%Ca-0.8%La alloy is found to be the optimum alloy exhibiting good casting p

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Kim, T. W., C. G. Kang, and S. S. Kang. "Rheology Forming Process of Cast Aluminum Alloys with Electromagnetic Applications." Solid State Phenomena 116-117 (October 2006): 445–48. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.445.

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This paper focuses on a rheo-forming of arm parts fabricated by an electromagnetic stirring system (EMS). This forming process takes place under high pressure of high pressure die casting and thin-walled casting is possible. Also, the productivity is higher than for low pressure die casting because of the shorter cycle time. Rheo-forming is advantageous because forming is performed in the semi-solid state with laminar flow and the gas content is low, which makes welding possible. Therefore, this paper examines arm parts with EMS and has investigated the mechanical properties after T6 and T5 he

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Saikawa, Seiji, Manabu Mizutani, and Nozomu Kawabe. "Effect of Sn Content on Heat Resistance of Mg-3%Al-1%Si Alloy for Casting." Materials Science Forum 941 (December 2018): 1071–76. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1071.

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Magnesium alloys have the characteristic with high specific strength and lightweight property, it is widely used for auto mobile industry. Heat-resistant magnesium alloy is focused as a suitable material for weight reduction of the engine and power train parts in automotive field. In this study, microstructure and heat-resistant property in Mg-3mass%Al-1mass%Si (Mg-3%Al-1%Si) alloy with containing large amount of Sn (tin) were investigated. The alloys produced by permanent mold casting were investigated by optical microscope (OM), scanning electron microscopy (SEM) and measuring of bolt load r

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Yuryev, Vladimir P., Elena N. Kalistratova, Anatoli N. Danilenko, Vladislav A. Protserov, and Anton V. Persikov. "The Generalized Heat Capacity/Amylose Content Function for Barley and Maize Starches." Starch - Stärke 51, no. 5 (1999): 160–62. http://dx.doi.org/10.1002/(sici)1521-379x(199905)51:5<160::aid-star160>3.0.co;2-r.

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Freitas, A. K. C., L. B. da Silva, A. C. S. da Costa, A. P. S. Peres, S. B. C. Pergher, and W. Acchar. "Tricalcium phosphate sheets with chitosan obtained via aqueous tape casting." Cerâmica 66, no. 380 (2020): 421–25. http://dx.doi.org/10.1590/0366-69132020663802922.

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Abstract Tricalcium phosphate (TCP) is a biomaterial produced in several biomedical applications, in addition to having biocompatibility and osteoconductive capacity. Biodegradable polymers of natural or synthetic origin such as chitosan and polyvinyl alcohol (PVA) have been used for tissue engineering applications because they have the properties of the native organic phase of bone tissue. Thus, the objective of this study was to obtain ceramic tapes based on TCP, chitosan, and PVA through the tape casting method. The viscosity data for all suspensions were ideal for the chosen processing. Th

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Dedov, Stanislav, Gunter Lehmann, and Rudolf Kawalla. "Application of Combined Casting-Forging Process for Production of Durable Lightweight Aluminum Parts." Key Engineering Materials 554-557 (June 2013): 264–73. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.264.

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Due to the constant development in the automotive industry, where high performance shared with the maximal comfort and safety at low car body weight are the primary goals, gains the lightweight construction in importance. Materials with light weight, high strength and toughness are being engaged. With this background the material aluminum and its alloys become highly attractive to manufacturers. There are mainly two ways of forming the metal materials: casting or forming. Apart from substitution of one method by another there are also many examples of combining of casting and forging processes

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Gates, S. J., G. Kornelius, S. C. Rencken, N. M. Fagan, P. Cowx, and L. Els. "The use of fine water sprays to suppress fume emissions when casting ferromanganese." Clean Air Journal 25, no. 2 (2015): 26. http://dx.doi.org/10.17159/2410-972x/2015/v25n2a3.

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During the casting of ferromanganese alloys from electric arc furnaces into sand beds at temperatures of up to 1800°C a considerable amount of very brown fumes are generated when the alloy fume is oxidized in the atmosphere. The fume is difficult to capture because of the large flux of gas that is generated. Possible reasons for this flux include the high evaporation rate of Mn at elevated temperatures, the large surface area of the casting beds and the large thermal plumes over the furnace tapholes and casting beds. It has been found that the use of fine water sprays along the edge of the roo

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