点焊电极纳米复合材料(CuCrZr/AlN)组织性能分析  

Microstructure and properties of copper alloy based nano composite for spot welding electrode

作　　者：邓景泉[1] 吴玉程[1] 宗跃[2] 王文芳[1] 黄新民[1] 于福文[1] 

机构地区：[1]合肥工业大学材料学院 [2]合肥工业大学复合材料公司,合肥230009

出　　处：《焊接学报》2007年第11期58-60,64,共4页Transactions of The China Welding Institution

基　　金：安徽省"十五"二期科技攻关项目(040020392);合肥市重点科技攻关项目(20051044);安徽省自然科学基金资助项目(20571022)

摘　　要：用机械合金化、粉末冶金方法制备铜铬锆合金基纳米复合材料(CuCrZr/AlN)点焊电极。采用透射电镜TEM,扫描电镜能谱SEM等方法表征纳米复合材料的组织性能。结果表明,纳米复合材料的电导率随AlN含量的增加而降低;纳米复合材料的热导率随AlN含量的增加而降低;纳米复合材料的软化温度随AlN含量的增加而提高,当AlN含量为0.4%(质量分数)时,纳米复合材料的软化温度为900℃左右;综合考虑各项性能,当AlN含量为0.2%(质量分数)时,纳米复合材料有较好的综合性能适合做点焊电极。Copper alloy-based composites were successfully prepared using PM method with mechanically alloyed powders for spot welding electrode(CuCrZr/AlN). Microstructure and properties were characterized using transmission electron microscope, scanning electron microscope etc. Their electrical conductivity, thermal conductivity and softening temperature were measured. Results show that with the increasing of the contents of AlN, the electrical and thermal conductivity both decrease while the softening temperature increases. When the content of AlN is 0.4wt%, its softening temperature reaches 900 ℃, while its electrical conductivity is about 45%IACS (international annealling copper standard) and its thermal conductivity is about 197 W/m·K. When the content of AlN is 0.2wt%, the composite has good comprehensive properties and is suitable for spot welding electrode.

关 键 词：纳米复合材料 粉末冶金 电导率 热导率 软化温度 

分 类 号：TB331[一般工业技术—材料科学与工程]