高强韧铝硅合金变速箱中间板压铸件热处理工艺研究

Heat Treatment Process of Die Cast Silafont36 Alloy Gearbox Intermediate Plates

为了提高铝硅合金变速箱中间板压铸件力学性能,采用正交实验方法研究了高强韧压铸铝合金Silafont36的热处理工艺。结果表明:影响抗拉强度和屈服强度的因素依次为固溶温度、时效时间、时效温度和固溶时间;影响伸长率的因素依次为时效温度、固溶温度、固溶时间和时效时间。经实验和生产验证,变速箱中间板采用的最佳热处理工艺参数为495℃×2 h+180℃×3.5 h;同时发现,压铸工艺参数中的真空度对铸件伸长率有显著影响。

In order to improve the mechanical properties of die-cast Silafont36 alloy gearbox intermediate plates, the heat treatment process of high strength and toughness Al-Si alloy Silafont36 was studied by orthogonal experiment. The results show that the factors affecting the tensile strength and yield strength of die-cast Al-Si alloy Silafont36 are solution temperature, aging time, aging temperature and solution time, and the factors affecting elongation are aging temperature, solution temperature, solution time and aging time. Experiments and production verify that the optimum heat treatment process for gearbox intermediate plates are 495 ℃ ×2 h+180 ℃ ×3.5 h. Meanwhile, the vacuum degree in the die casting process was found to have a significant effect on the elongation..