紫铜-黄铜搅拌摩擦焊接头的组织与力学性能  

Microstructure and mechanical properties of friction-stir welded joint of pure copper to brass

作　　者：刘小文[1] 杨宁宁[1] 穆耀钊[1] 鄢君辉[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《中国有色金属学报》2005年第5期700-704,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50275123)

摘　　要：研究了紫铜和黄铜搅拌摩擦焊接的可行性,对焊接接头的金相组织进行了分析,并通过拉伸实验、硬度分析、弯曲实验,对接头的性能进行了验证。结果表明紫铜黄铜具有良好的搅拌摩擦焊接性能,可获得与母材等强度的搅拌摩擦焊接接头。焊合区在热力偶合作用下获得动态再结晶组织,接头黄铜一侧热影响区沿厚度方向上下不同,下侧可分为再结晶区、不完全再结晶区、动态回复区;上侧出现明显的偏析现象;接头紫铜一侧热影响区出现明显的须状组织,并有晶粒微溶的迹象。The microstructures of the friction-stir welded joints of pure copper to brass and their performance are examined through tension, hardness and bending tests. The results show that the pure copper and brass can be friction stir welded and the welded joints have the same strength as the base material. The nugget zone has dynamic recrystallization microstructure under the thermo-mechanical effect. The microstructure of the heat-affected zone in the joint on the side of brass has some differences between the upside and underside. The latter can be divided into recrystallization zone, incomplete recrystallization zone and dynamic recovery zone, and the former is of apparent segregation. There are some streamline microstructures and a slight grain melting in the heat affected zone on the side of pure copper.

关 键 词：Cu 搅拌摩擦焊 金相组织 力学性能 

分 类 号：TG407[金属学及工艺—焊接]