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Abstract

The current trends of production of casts are directed towards production of components disposing of higher accuracy, increased quality of surface and homogenous structure. In case of a thin-walled cast the development of speed of pressing and of pressure was observed inside the mould cavity during pressure die casting of ferrous alloys. In case of die casting of ferrous alloys the attention was paid to life service of a pressing piston and of a filling chamber. The optimal temperature of the steel casting ranges from 1600 to 1750°C and optimal mould temperature ranged from 220 to 260°C. The residues having occurred in gates reached the hardness of 38 HRC and in case of casts the value was of 45 HRC. Influence of acting of resistance pressure on the thin-walled casts only minimally. With the increasing resistance pressure the structure becomes more fine-grained and along with the increasing thickness of the wall the influence of the resistance pressure increases as well. Technology of pressure die casting of iron alloys can be compared with the pressure die casting technology of aluminium alloys. As standard, for pressure die casting the cast irons with carbon content of lower than 3% are recommended.

-Pressure Die Cast Al-Si Alloys: A Review , International Journal of Metalcasting, vol. 9(1), pp. 43-53. [4] Dong, X., Yang, H., Zhu, X, Ji, S.,(2019), High strength and ductility aluminium alloy processed by high pressure die casting , Journal of Alloys and Compounds, vol. 773, pp. 86-96. [5] Jiao, X.Y, et. Al, (2019), Influence of slow-shot speed on PSPs and porosity of AlSi17Cu2.5 alloy during high pressure die casting , Journal of Materials Processing Technology, vol. 268, pp. 63-69. [6] Apparao, K.c., Birru, A.K, (2017), Optimization of Die casting process based on

-Pressure Die Cast Al-Si Alloys: A Review, International Journal of Metalcasting , vol. 9(1), pp. 43-53. [4] Dong, X., Yang, H., Zhu, X, Ji, S.,(2019), High strength and ductility aluminium alloy processed by high pressure die casting, Journal of Alloys and Compounds, vol. 773, pp. 86-96. [5] Jiao, X.Y, et. Al, (2019), Influence of slow-shot speed on PSPs and porosity of AlSi17Cu2.5 alloy during high pressure die casting, Journal of Materials Processing Technology , vol. 268, pp. 63-69. [6] Apparao, K.c., Birru, A.K, (2017), Optimization of Die casting process based on

Abstract

In the contribution the high growth of viscosity and initial stress of alloys in the crystallization interval with undercooling against of the liquidus follows from theoretical analysis. At these alloys used in pressure die casting the permissible undercooling that does not endanger pressure die casting operation. The application of the device for die temperature regulation ensures the safe operation.

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Shrinkages in Aluminum Gravity Castings , Shape casting, San Diego, 129-136. Humphreys, N.J., McBride, D., Shevchenko D.M., Croft T.N., Withey P., Green N.R., Cross, M., 2013. Modelling and validation: Casting of Al and TiAl alloys in gravity and centrifugal casting processes , Applied Mathematical Modelling, 37, 7633-7643. Kasliwal, N. Bagale, T., 2017. High Pressure Die Casting and Gravity Die Casting of Aluminium Alloys: A Technical and Economical Study. Advances In Manufacturing Technology XXXI, 6, 561-566. Kasliwal, N., Bagale, T., 2017a. High pressure die casting

Science and Engineering, 64/2, 192-197. Bösch, D., Pogatscher, A., Hummel, M., Fragner, W., Uggowitzer, P.J., Göken, M., Höppel, H.W. 2014. Secondary Al-Si-Mg High-pressure Die Casting Alloys with Enhanced Ductility . Metallurgical and Materials Transactions A, 46/3, 1-11. Djurdjevič, M.B., Grzničin, M.A. 2012. The effect of major alloying elements on the size of the secondary dendrite arm spacing in the as-cast Al-Si-Cu alloys . Archives of Foundry engineering, 12/1, 19-24. Foundry Lexikon, Dendrite arm spacing, Available at: https

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addition on Fe-rich intermetallics morphology and dry sliding wear investigation of hypereutectic Al-17.5%Si alloys. Journal of Materials Research and Technology, 5/3, 250-258. Bilewicz, M., Palček, P., Tansky, T., Markovičová, L. 2013. Computer aided image analysisi of nanocomposites. Archives of Materials Science and Engineering, 64/ 2, 192-197. Bösch, D., Pogatscher, A., Hummel, M., Fragner, W., Uggowitzer, P.J., Göken, M., Höppel, H.W. 2014. Secondary Al-Si-Mg High-pressure Die Casting Alloys with Enhanced Ductility. Metallurgical and Materials Transactions