汽车铝合金副车架挤压铸造工艺设计和产品开发

Development of Squeeze Casting Technology for Manufacturing Aluminum Alloy Subframe for Automobile

面向汽车制造轻量化的需求,研究和开发了汽车铝合金副车架挤压铸造工艺,并采用数值模拟的方法对工艺进行了优化。使用SCV-2500型立式挤压铸造机开展副车架产品的试制,结果表明,优化工艺能显著减少铸件的缩孔缩松缺陷。从铸件本体取样以观察其微观组织,结果表明,在挤压铸造工艺条件下,铸件组织均匀。经过T6热处理强化后材料的抗拉强度可达到280 MPa,屈服强度可达到225 MPa,伸长率可达到8.1%,硬度为HB95。

With the demand for lightweight in automobile manufacturing, a squeeze casting process for an aluminum subframe component was designed, and numerical simulation technique was used to optimize the casting process. The subframe component was produced with a vertical squeeze casting machine SCV-2500. The results show that shrinkage defects were significantly reduced with the optimized process obtained by using numerical simulation. The as-cast microstructure is uniform, and after T6 heat treatment, the tensile strength is 280 MPa, the yield strength is 225 MPa, the elongation reaches 8.1%, and the hardness is HB 95.