摘要
对40Cr待焊接面的表层实施激光淬火的组织超细化预处理后,将其与QCr0.5在焊接温度750～800℃、初始应变速率（2.5～5）×10-4s^-1、预压应力56.6～84.9 MPa、焊接时间120～180 s的条件下,可实现二者异材的固态焊接,接头强度能够达到QCr0.5母材的强度。焊后对接头区的显微组织观测表明,焊接接头区的界面两侧显微组织连续,已经实现了良好的冶金结合;界面两侧近界面处的组织因C、Cr、Cu原子的扩散而发生了明显变化。
The welding surface of 40Cr steel was pretreated by laser quenching. The different base materials of 40Cr steal and QCr0.5 copper alloy can be successfully welded under the conditions of welding temperature of 750-800℃, the initial strain late of （2.5-5）×104 s^-1, prepressure under 56.6-84.9MPa and welding time of 2-3 min. The tensile strength of the welded joint can be as high as that of QCr0.5 base metal. The microstrueture of the welded joints was observed and the results show that the microstructure of two sides of the welded joint is continuous. The good metallurgical joint can be gained. The microstructure of two sides of welded joint changes obviously because C and Cr and Cu atoms diffuse into each other.
出处
《热加工工艺》
CSCD
北大核心
2014年第21期174-176,共3页
Hot Working Technology
基金
河南省高校创新人才基金(教高2004-294)
激光技术国家重点实验室开放基金资助项目(20010110)
河南省教育厅自然科学基金资助项目(2003430211)
关键词
钢
铬青铜
固态焊接
显微组织
steel
chrome bronze
solid state welding
microstructure
