Research on High Strength Hydraulic Torque Converter Materials and Casting Process

With the development of high-power vehicle transmission system, high-strength hydraulic torque converter has become a new demand. The shrinkage and flow characteristics of high-strength casting materials are changed. A new type of ZL114A material and heat treatment scheme with the best mechanical properties under different element ratios and heat treatments were explored through orthogonal experiments for high-strength hydraulic torque converter materials and casting processes. The ProCAST casting simulation model was constructed to dynamically observe the mold filling and solidification process of low pressure casting under different aluminum liquid temperature, mold temperature and sand core temperature. The casting quality was evaluated according to the casting shrinkage rate and shrinkage area obtained by numerical calculation, and the search for the best process parameters was accelerated; According to the numerical calculation results, the actual casting is carried out, and the best casting scheme is obtained by exploring and verifying. The results show that the furnace test bar made of new ZL114A material can reach the tensile strength of more than 360MPa and the elongation of more than 10%. After optimizing the process parameters, the yield increased from 75% to 92.5%.