马氏体相变温度变化对TiNi合金磨损性能的影响  

Effect of martensitic transformation temperatures on wear behavior of TiNi alloy

作　　者：向国权[1,2] 程先华[2] 

机构地区：[1]郑州轻工业学院机电工程学院,河南郑州450002 [2]上海交通大学机械与动力工程学院,上海200030

出　　处：《功能材料》2007年第A10期3753-3755,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目（A50071034）

摘　　要：利用等通道转角挤压工艺原理，在挤压模具通道转角为90°，温度为750、850℃，挤压速率为25mm／s条件下，对TiNi合金进行晶粒细化加工处理。在干摩擦条件下对细晶TiNi合金的磨损特性进行了实验研究。结果表明，原态钛镍合金的晶粒由60μm细化到小于10μm，晶粒细化后的TiNi合金的耐磨性能得到显著提高。分析了马氏体相变温度变化对TiNi合金耐磨性能的影响机理。TiNi alloy was fabricated via equal channel angular extrusion at temperatures750 and 850℃, and ram speed was 25mm/s. Under dry sliding conditions, the wear behavior of grain-refined TiNi alloy was examined on an M-2000 friction and wear tester. The grain size of the as-received TiNi alloy was fined from 60μm to less than 10μm, and the wear resistance of grain-refined TiNi alloy was much higher than the as-received. The mechanism that how martensitic transformation temperatures affect the wear behavior of TiNi alloy was analyzed.

关 键 词：NITI合金 等通道转角挤压 马氏体相变 磨损特性 

分 类 号：TG14[一般工业技术—材料科学与工程]