![]() Cooling curves during gas quenching of H-13 blocks and die shapes have been measured under a variety of gas pressure. ![]() The main tasks of the project were to compile a database on physical and mechanical properties of H-13 conduct gas quenching experiments to determine cooling rates of dies in difference vacuum furnaces measure the as-quenched distortion of dies and the residual stresses generate finite element analysis models to predict cooling rates, distortion, and residual stress of gas quenched dies and establish rules and create PC-based expert system for prediction of cooling rates, distortion, and residual stress in vacuum/gas quenched H-13 dies. The ultimate goal of this project is to increase die casting die life by using fast enough quenching rates to obtain good toughness and fatigue resistance in premium grade H-13 steel dies.
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