异种金属之间的成功焊接在于接头的强度等于待焊两种金属中最弱一种的强度,即具有足够的强度和塑性,使构件的破坏不致出现在焊缝。在种种异种金属之间,均可用许多方法实现这样的连接。异种金属材料焊接的问题关键在于两种金属之间的过渡区及在其中所形成的金属间化合物。就熔化型焊接而言,研究有关两种金属的平衡图是十分重要的。如果两种 The successful welding between dissimilar metals is that the strength of the joint is equal to the strength of the weakest one of the two metals to be welded, ie it has sufficient strength and plasticity so that failure of the member does not occur in the weld. Between dissimilar metals, there are many ways to accomplish this connection. The crux of the problem with dissimilar metals welding is the transition between the two metals and the intermetallic compounds formed therein. In the case of fusion welding, it is important to study the equilibrium diagram of the two metals. If two kinds