激光冲击制备铜钨合金触头材料结构及耐蚀性研究  

Structure and Corrosion Resistance of Cu-W Alloy Contact Material Prepared by Laser Shock Processing

作　　者：王成磊[1] 高原[1] 张光耀[1] 

机构地区：[1]桂林电子科技大学,广西桂林541004

出　　处：《稀有金属材料与工程》2015年第2期489-492,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51201043;51264007);广西自然科学基金重点项目(2010GXNSFD013008);广西科学研究与技术开发科技攻关计划项目(12118020-2-2-1);广西信息材料重点实验室项目(1210908-07-Z)

摘　　要：为了提高铜钨合金的使用性能、细化组织、消除合金夹杂、微孔等缺陷,对铜钨合金进行激光冲击处理,分析了激光冲击法制备铜钨合金触头材料的显微组织及相结构,并研究了其电导率和耐磨粒磨损性能。结果表明,激光冲击处理后,组织中的钨粒子得到明显细化,由处理前超过100μm的大颗粒变成尺寸仅为4~7μm小颗粒,且均匀分布,冲击细化层厚度为1002μm;铜钨合金经过激光重熔处理后,相成分并没有改变,说明合金中的铜和钨在激光冲击处理过程中（Ar气氛保护）不发生化学反应,可以最大限度的保持原有的电学特性;激光冲击处理对电导率影响不大,可以满足使用要求;在1 mol/L H2SO4溶液中,铜钨合金激光冲击层的耐腐蚀性能比铜钨合金未处理试样提高了1.38倍。A Cu-W contact material alloy was prepared by laser shock processing to improve the performance of the Cu-W alloy, refine the structure, and eliminate the alloy inclusions, pores and other defects. The microstructure, phase structure and other aspects of the Cu-W alloy contact materials by laser shock processing were investigated, as well as its conductivity and abrasive wear resistance were studied.The results show that after laser shock processing, the structure of tungsten has been refined significantly from larger than 100 μm of W particles into a size of only 4 μm to 7 μm, and they are uniformly distributed, with the impact refinement layer thickness 1002 μm. The phase composition of Cu-W alloy has not changed after laser treatment. There are no chemical interaction between copper and tungsten in the laser shock processing because of Ar atmosphere protection, which can maintain the electrical properties to the fullest extent. Laser shock treatment has few effects on the conductivity, and it can meet the use requirements. In l mol/L H2SO4 solution, the corrosion resistance of Cu-W alloy after laser treatment is increased by 1.38 times compared with the untreated Cu-W alloy.

关 键 词：触头材料 铜钨合金 激光冲击法 耐蚀性 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG146.11[一般工业技术—材料科学与工程]