以真空熔敷为先导的钢-铝扩散连接
Vacuum Deposition Coating for Stainless Steel-Aluminum Diffusion Bonding
杨宗辉，郁柳，侍春林
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作者单位：南京工程学院材料工程学院
中文关键字：真空熔敷；铝合金；扩散连接；涂层
英文关键字：vacuum deposition; aluminum; diffusion bonding; coating
中文摘要：采用真空熔敷法在304不锈钢表面制备Cu-Ni涂层，然后以Cu-Ni涂层采用真空熔敷法在304不锈钢表面制备Cu-Ni涂层，然后以Cu-Ni涂层为中间层，扩散连接304不锈钢与6063铝合金。利用光学显微镜（OM）、SEM及EDS，研究不锈钢/Cu-Ni涂层/铝合金接头的界面显微组织特征及成分分布。结果表明，与不锈钢母材熔合的Cu-Ni涂层中，形成了宽约4µm的Fe、Cr、Ni元素扩散带；与Cu-Ni涂层扩散结合的铝母材中则形成了两层化合物，靠近结合线的化合物层厚约1µm，主要由CuAl2¬和CuAl组成；远离结合线的化合物层厚约3µm，主要由CuAl2¬组成；没有在铝合金母材中检测到Ni原子。Al原子扩散进入Cu-Ni涂层的距离约3µm。
英文摘要：Diffusion bonding was carried out in vacuum between aluminum and stainless steel 304 with Cu-Ni coating prepared by vacuum deposition. The microstructures, composition distribution of the joints were studied by OM ,SEM and EDS. The results show that about 3μm Fe, Cr elements diffuse band forms in the Cu-Ni coating for stainless steel/Cu-Ni alloying coating interface. For Cu-Ni coating/aluminum interface, about 1μm compound layer consists of CuAl2¬ and CuAl forms near the bonding line, and about 3μm CuAl2 compound layer forms away the bonding line, but no Ni element is detected in aluminum matrix. The distance of aluminum element diffusing to Cu-Ni coating is about 3μm.