Automotive Aluminum Alloy Subframe of High Performance Extruded Profiles

Wang Lizhong

（Shanghai Unison Aluminum Products Co., Ltd., Shanghai 201702） Abstract：new energy vehicles have become the main direction of the development of the global automobile industry. The application of aluminum alloy in auto parts is the most direct and effective way to reduce weight of new energy vehicles. The aluminum alloy subframe is an important approach to achieve lightweight. The extruded aluminum alloy subframe is welded from 6082 aluminum alloy, and then through the artificial aging heat treatment to achieve T6 condition. It can significantly improve the performance of aluminum alloy subframe. After forming, the tensile strength Rm can reach ≥330 MPA, yield strength Rp0.2 can reach ≥ 310 MPA, elongation can reach A50≥13%. The aluminum alloy subframe with high performance extruded profile can meet the overall performance requirements of the whole vehicle, and improve the technical level of the automobile industry as well.

Key words: New energy, Light weight, Extrusion profile, Aluminum alloy subframe with high performance

1 前言

当前，全球新一轮科技革命和产业变革蓬勃发展，新能源汽车为世界经济发展注入新的动能。

2020 11 2

年 月 日，国务院办公厅印发《新能源汽车

产业发展规划（2021-2035

年）》指出，发展新能源汽车是我国从汽车大国迈向汽车强国的必由之路，是应对气候变化、推动绿色发展的战略举措。开展高性能铝合金材料的产业化应用是新能源汽车基础

技术提升工程[1]。而高性能挤压型材铝合金副车架将推动新能源汽车与能源的融合发展。2 高性能铝合金原材料

2.1 高性能铝合金化学成分配方及熔铸

6082 Al-mg-si

可热处理强化 铝合金属于 系，

Mg2si

[2]。该合金具有中等强度、耐腐

相为强化相蚀性高，无应力腐蚀破裂倾向，焊接性能好，成型性和工艺性能良好等优点，具有良好的综合性能。该合金广泛用于制造中等强度、塑性和抗腐蚀要求高的飞机零件、大型结构件以及常温下工

作者简介：王立忠(1982—)，男，汉族，工程师，学士学位，研究方向为新材料新能源技术研发与应用、铝合金焊接。参考文献引用格式：

王立忠. 高性能挤压型材的汽车铝合金副车架[J].汽车工艺与材料，2021（6）：18-23.

WANG L. Automotive Aluminum Alloy Subframe of High Performance Extruded Profiles [J]. Automobile Technology & Material, 2021(6): 18-23.