新型真空高压铸铝车身结构件的材料研发

High Vacuum Die Casting Material Development for New Vehicle Body Structure

为满足乘用车轻量化需求而设计的新型车身结构件"前轮罩",需要超高塑性的高压铸铝材料。利用突破传统的真空压铸,可以通过热处理进一步提高铝铸件的塑性。就此进行真空高压铸铝材料的研发,制定合理的成分配比和热处理工艺,所得AL-C-D-Si10Mn Mg-T7真空高压铸铝材料的断后伸长率稳定超过10%,攻克了传统高压铸铝脆性大的技术障碍。

SHOCK TOWER, a new vehicle body structure part, requires more ductile property than traditional aluminum die casting. With high vacuum die casting, it＇s possible to promote ductile property by heat treatment. Therefore a new material is developed by composition and heat treatment designing for the new casting process. The percentage elongation after fracture of new material AL - C - D - Si10MnMg - T7 could be stably higher than 10% This made a leap of ductile property of traditional aluminum die castings.