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The influence of the method of supersaturation on the course of precipitation hardening of chill castings made of aluminium silicon alloys

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Abstract

A comparative study of the two methods of precipitation hardening of Al-Si cast alloys is presented, i.e. the ordinary and the simplified method. The latter consists in application of the quenching of chill castings directly after solidification. The microscopic structure and the hardness of laboratory-cast specimens as well as mechanical properties of production castings were investigated. It is concluded that the simplifed method of supersaturation has an essential impact on the kinetics of the ageing process and the structure o of the alloy. The mechanical properties obtained by this method can be satisfactory and the savings of energy, labour and equipment can be significant.

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Authors and Affiliations

  1. Metal Forming, Welding and Casting Institute, Warsaw Technical University, Narbutta 85, 02-524, Warsaw, Poland

    P. Murza-Mucha & R. Szostak

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  1. P. Murza-Mucha
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  2. R. Szostak
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Murza-Mucha, P., Szostak, R. The influence of the method of supersaturation on the course of precipitation hardening of chill castings made of aluminium silicon alloys. J Mater Sci 17, 3621–3629 (1982). https://doi.org/10.1007/BF00752206

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  • DOI: https://doi.org/10.1007/BF00752206

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