热等静压制备Ti(C,N)基金属陶瓷功能梯度材料  

Preparation of Functionally Graded Ti(C,N)-based Cermets with HIP Technology

作　　者：晏鲜梅[1] 熊惟皓[1] 郑立允[1] 

机构地区：[1]华中科技大学塑性成型模拟及模具技术国家重点实验室,湖北武汉430074

出　　处：《机械工程材料》2006年第5期36-37,40,共3页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(50074014);湖北省自然科学基金资助项目(2003ABA092)

摘　　要：用热等静压(HIP)技术制备了Ti(C,N)基金属陶瓷功能梯度材料,对热等静压氮化处理前后的组织结构、硬度以及密度变化作了比较分析。结果表明:HIP技术能在金属陶瓷表面形成硬质薄膜,表面硬度提高,并且硬度由表及里逐渐减小,这是由于高温高压氮化处理使材料中的孔洞闭合,微裂纹和缺陷的减少使得材料性能显著提高。The preparation technology of functionally graded （FGM） Ti（C, N）-based cermets was reviewed. The characteristics of microstructure and hardness of the FGM cermets produced by hot isostatic pressing （HIP） technology were summarized. A surface zone rich in titanium and nitrogen was induced hy heat-treatment. Density and hardness were improved and hardness gradient was formed. The high temperature and high pressure N2 made the holes closed and defects vanished, and resulted in a prolonged tool life.

关 键 词：Ti(C N)基金属陶瓷 功能梯度材料 热等静压技术 

分 类 号：TG174.453[金属学及工艺—金属表面处理]