对表面镀1.5~70μm镍的Q235与304不锈钢在1000℃下进行1~4 h的扩散焊,焊接后的试样经过压下量约69%的冷轧,焊接界面未出现分层。用金相显微镜、SEM及EDS分析了冷轧前后试样结合面的微观结构。结果表明,焊接完成后,在结合面的不锈钢侧形成Cr_7C_3+Fe_3C的析出区,而在碳钢侧形成了贫碳区。可以对焊接完成的试样进行冷轧,冷轧复合板经过1000℃淬火,抗拉强度为710.6 MPa,断后伸长率为22.9%。 The Q235 and 304 stainless steel with 1.5 ~ 70μm nickel plated on the surface were diffusion welded at 1000 ℃ for 1 ~ 4 h. The welded samples were cold rolled with a reduction of about 69% without any delamination at the welded interface. The microstructure of the bonded area before and after cold rolling was analyzed by metallographic microscope, SEM and EDS. The results show that after the welding is completed, the precipitation area of ​​Cr_7C_3 + Fe_3C is formed on the stainless steel side of the bonding surface and the carbon lean zone is formed on the side of the carbon steel. The welded samples can be cold-rolled. The cold-rolled composite plate is quenched at 1000 ℃ with a tensile strength of 710.6 MPa and an elongation at break of 22.9%.