作为汽车轻量化材料中最主要的两类材料,高强度钢板和铝合金组成的钢-铝一体化车身成为轻量化的发展技术路线。本试验用Cu作为中间层,通过压力钎焊对工业纯铝和Q235低碳钢进行了连接。试验研究了工艺参数对接头组织和性能的影响,分析了其接头的显微组织、力学性能和元素分布,确定出了合适的连接工艺参数,并对各连接界面形貌进行了分析。研究表明,室温下接头的拉伸强度和弯曲强度等于或超过基体,焊缝与母材之间没有形成脆性相。 As the two main types of materials used in lightweight automotive materials, the steel-aluminum integrated body made of high-strength steel and aluminum alloy has become a light-weight development technology line. In this experiment, Cu was used as an intermediate layer, and industrial pure aluminum and Q235 mild steel were connected by pressure brazing. The effects of technological parameters on the microstructure and properties of the joints were studied. The microstructures, mechanical properties and elemental distributions of the joints were analyzed. The suitable technological parameters of the joints were determined and the morphologies of the joints were analyzed. The results show that the tensile strength and bending strength of the joint at room temperature equal or exceed the matrix, and no brittle phase is formed between the weld and the base metal.