激光表面熔凝CuCr50粉末冶金材料  

CuCr50 Alloy contactor by Laser Alloying

作　　者：苗柏和[1] 张艳[1] 常晓惠 刘永镇 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]国家产学研激光技术中心,北京100027

出　　处：《应用激光》1999年第5期253-255,288,共4页Applied Laser

摘　　要：使用额定功率为９ｋＷ的连续ＣＯ_２激光在熔渗ＣｕＣｒ粉末冶金料片表面进行原位熔凝合金化，结果表明，２至３ｍｍ厚的ＣｕＣｒ５０合金层内显微组织显著细化，ＣｕＣｒ组元分布均匀，熔凝层的硬度明显高于同组成的粉末冶金材料。这种具均匀细小的显微组织的ＣｕＣｒ５０合金触头工作表面有列高的机械和电器性能。in this paper, Laser alloying on CuCr50 alloy surface with 9kW CO_2 laser was carried out. The results show that the microstructure of 2- 3mm CuCr50 alloying layer was obviously thinner than that of the substrate, the Cu and Cr elements was well - distributed; The hardness of laser alloying layer is higher than that of the powder metallurgy material outstandingly. This kind of CuCr50 alloy contactor by laser alloying would rather have higher mechanical and electrical properties.

关 键 词：激光 表面熔凝 CUCR合金 显微组织 粉末冶金材料 

分 类 号：TF123.71[冶金工程—粉末冶金] TN249[冶金工程—冶金物理化学]