A STUDY OF THE PROPERTIES OF S25C-SUS405 STEEL JOINTS BY VACUUM DIFFUSION WELDING

摘要

In this paper, the properties of S25C-SUS405 steel joints by vacuum diffusion welding are discussed, and the specific deformation, tensile strength and hardness of the joints made of those two kinds of steel are introduced. Through metallographic examination and microanalysis, it can be observed that at the weld interface of the joints there is a decarbonized layer on the S25C steel side and a carburized layer on the SUS405 steel side. This is the main cause giving rise to the heterogeneity of mi-crostructure distribution and the nonuniformity of hardness distribution in weldment. In addition, with the help of electronic probe microanalysis the element distribution, such as carbon and chrome, is reported in this paper.