Electron Beam Melt-brazing of Hard Alloy to Steel with Ni-Fe Interlayer

摘要：

　　A study of hard alloy to steel welding by electron beam melt-brazing was carried out.The weld was composed mainly of molten steel,while the brittle compound ηphase formed easily at the fusion line near the hard alloy.Longitudinal macroscopic cold cracks occurred at the heat affected zone of the hard alloy under welding deformation and stress induced by the non-centered welding.According to the metallurgical compatibility principle,cold cracks can be avoided by a powder metallurgy Ni-Fe interlayer during hard alloy to steel welding by electron beam melt-brazing.The weld microstructure was composed of a Ni-based solid solution with interlayer addition that was capable of optimizing the weld composition,avoiding the brittle ηphase compounds,decreasing the weld hardness and enhancing coordination deformation of the weld.

关键词： hard alloy electron beam melt-brazing interlayer joint microstructure

作者: Chen Guoqing Zhang Binggang Wu Zhenzhong Mao Wei Feng Jicai

作者单位: State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China

会议类型: 国际会议

会议名称: 2012 Zhuzhou International Conference on Cemented Carbides(株洲硬质合金国际学术会议)

会议地点: 株洲

会议语种:英文

页码: 463-468

在线出版日期: 2012-09-12（万方平台首次上网日期，不代表论文的发表时间）