“传祺”轿车底盘铝合金后副车架的压铸技术开发轿车底盘铝合金后副车.PDF

广汽广汽 “传祺“传祺”轿车底盘铝合金后副车架的压铸技术开发”轿车底盘铝合金后副车架的压铸技术开发 广汽广汽 ““传祺传祺””轿车底盘铝合金后副车架的压铸技术开发轿车底盘铝合金后副车架的压铸技术开发 1,2 1 2 1 2 1 1 1 万里 刘后尧 林海 张遇朝 吴树森 吴湛方 赖沛基 李高 （1.广东鸿泰科技股份有限公司, 广东高要, 526100. 2.华中科技大学材料成形与模具技术国家重 点实验室, 湖北武汉, 430074 ） 摘要：汽车车身/底盘悬架关键零部件的轻量化及其成形技术是当前国内外开发的前沿领域之一。 本文针对广汽自主品牌轿车 “传祺”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：压铸AlMg 合金的主要成分为 Mg4.6~5.4% ，Si1.4~1.6%，Mg/Si 3.1~3.5 。采用了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。 关键词：真空压铸，轻量化，AlMg 合金，底盘，后副车架 Research on Vacuum Die Casting Technology of Al Alloy Chassis Rear Sub-frame of GAC Trumpche Car 1,2 1 2 1 2 1 1 1 Wan Li Liu Houyao Lin Hai Zhang yuhao Wu Shusen Wu Zhanfang Lai Peiji Li Gao (1. Guangdong Hongtai Technology(holdings) Co. ltd. Guangdong Gaoyao, 5261001. 2. State Key Laboratory of Materials Processing and Die ＆ Mold Technology, Huazhong University of Science and Technology ,Hubei Wuhan, 430074. ) Abstract: The development of lightweight and processing technology for car chassis suspension key parts is one of the foremost fields at home and abroad recently. To meet the requirement of ownbrand car named “Trumpche” belonging to Guangzhou Automobile Group (GAC), high vacuum diecasting technology for the rear subframe of car chassis is researched and developed in the paper. The results showed that the optimized chemical composition of AlMg alloy with high strength and ductility are as followings Mg4.6~5.4%，Si1.4~1.6%，Mg/Si 3.1~3.5. Good sealing effect can be improved by d