轿车底盘铝合金后副车架的压铸技术开发  

Research on Vacuum Die Casting Technology for Al Alloy Chassis Rear Sub-frame of GAC Trumpche Car

作　　者：万里[1] 刘后尧 吴树森[1] 吴湛方 赖沛基 张遇朝 张新强 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室 [2]广东鸿泰科技股份有限公司

出　　处：《特种铸造及有色合金》2012年第2期145-148,共4页Special Casting & Nonferrous Alloys

基　　金：广东省教育部产学研结合项目(2009B090300243);广东省肇庆市科技攻关项目(2009G004)

摘　　要：针对广汽自主品牌"传祺"轿车的底盘铝合金后副车架压铸零件,从压铸合金的力学性能、压铸工艺设计及优化、模具设计及制造、铸件质量控制等方面进行了开发和研究。结果表明,采用耐热密封结构的高真空压铸模具具有良好的密封性能,可靠性高。多区域的温度测量及冷却水流量的实时调节提高了模具温度控制的精度。通过对工艺参数的优化,有效消除了铸件缺陷如裂纹、冷隔、缩孔、缩松等。开发的铝合金后副车架的铸件本体抗拉强度≥240MPa,屈服强度≥145MPa,伸长率≥6%,满足了"传祺"轿车的的使用要求。To meet the requirements of own-brand car named ＂Trumpche＂ belonging to Guangzhou Automobile Group （GAC）, high vacuum die-casting technology for the rear sub-frame of car chassis was developed including mechanical properties of the alloy, processing design and optimization, design and manufacturing of the mould, quality control of die castings. The results show that good sealing effect can be improved by adopting high vacuum die casting die with heat resistant sealing structure. Die temperature controlling precision was improved by thermocouple positioned in multi-location of the die and on-time adjustment of cooling water flow rate. Through optimizing processing parameters, some defects, such as crack, cold shut, shrinkage porosity （hole）, can be eliminated. The car chassis with tensile strength over 240 MPa, yield strength over 145 MPa and elongation greater than 6%can be achieved, meeting the use requirements.

关 键 词：真空压铸 轻量化 AL-MG合金 底盘 后副车架 

分 类 号：TG249.2[金属学及工艺—铸造]