激光熔覆修复铜合金零件的工艺研究  

Technological Research on Repairing the Damaged Copper Alloy Parts by Use of Laser Cladding

作　　者：葛志军[1] 邓琦林[1] 宋建丽[1] 陈畅源[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《电加工与模具》2007年第1期39-40,68,共3页Electromachining & Mould

基　　金：国家自然科学基金资助项目(50375096)

摘　　要：研究了铜合金表面激光熔覆修复工艺和熔覆层组织。结果表明,采用优化的激光功率和扫描速度,可在黄铜基体表面熔覆与基体呈冶金结合、无裂纹的锡青铜合金修复涂层;其熔覆层组织具有快速凝固特征,熔覆层从下到上分别为细小胞状晶、粗大树枝晶、细小枝晶和胞状晶组织。The craft and microstructure of laser cladding on copper alloy surface were studied. The result indicated that a non-crack tin bronze coating which has a metallurgy union with the substrate was obtained on the brass substrate by using the optimal laser power and scanning velocity. And the clad coating has a character of rapid solidification structure. The distribution of the structure is fine butcher shape crystal, thick branch crystal , thin branch crystal and butcher shape crystal from the bottom to the top of the cladding coating.

关 键 词：激光熔覆 修复 铜合金 锡青铜 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TN249[电子电信—物理电子学]