铜合金的激光熔敷

Laser Cladding of Copper Alloy

从九种铜合金粉末中优选出了适于激光熔敷的ＣｕＳｎＰ合金。Ｃｕ／铸铁激光熔敷存在界面浸润能力差、表面易氧化、层内气孔多等缺陷；它属于微稀释熔敷；对工艺参数控制严格。添加硅、硼等脱氧剂可改善界面浸润和保护能力，获得可工业应用的大面积熔敷层，其主要相结构为ａ＋β，Ｈｖ１５０。

Copper alloys suitable for laser cladding on cast iron are selected from nine typesof conventional powders. There are a POOr spreading ability and porosity of copper alloyover the surface of cast iron. Copper alloy surface is easily oxidized in atmosphere. Theseshortuges have been overcome by adding deoxidizers of St and H3BO3. Laser parameters,stress and coefficient of friction have been examined and the larger smooth surface of Cu/cast iron for friction by laser cladding has been made for the application of the guide shoes ofmachine.