STUDY OF INFLUENCE OF HEAT TREATMENT TIME ON MECHANICAL PROPERTIES AND STRUCTURE OF A CYLINDER HEAD CASTING FOR AUTOMOTIVE INDUSTRY

摘要

The properties of Al-Si alloys, mainly low density, corrosion resistance in some mediums, good electric and thermal conductivity, a possibility to produce complicated and precision castings forming possibilities of wide industrial utilisation, mostly in car and aircraft industry, that means, everywhere where is important construction task between mechanical properties and weight. The experiments was to consider the influence of heat treating period on mechanical properties and structure of AlSi7Mg0,3 alloy and to find out possibilities to short the heat treatment time with the view of saving requested values of mechanical properties and save the same time period for dessolving annealing and for artificial ageing too.