Effect of hot isostatic pressing nitrogen on the microstructure and properties of a Ti(C,N)-based cermet

作     者：YAN Xianmei XIONG Weihao YANG Yong ZHENG Liyun YAN Xianmei, XIONG Weihao, YANG Yong, and ZHENG Liyun State Key Laboratory of Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China

作者机构：State Key Laboratory of Die and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2006年第25卷第4期

页      面：321-325页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financially supported by the Natural Science Foundation of Hubei Province (No. 2003ABA092) and the Natural Science Foundation of China (No.50074014) 

主　　题：Ti(C, N)-based cermet hot isostatic pressing microstructure properties 

摘      要：The high-temperature, high-pressure hot isostatic pressing technology was used for depositing hard coatings on Ti（C, N）-based cermets. The rnicrostructure and properties of the sample were investigated using optical microscopy, scan- ning electron microscopy, X-ray diffraction, electron probe microanalysis, and microhardness tester. The results showed that the rich titanium and nitrogen in surface zone were induced by the heat treatment. The high nitrogen activity of the surface region was the driving force for outward transport of titanium and inward transport of tungsten in the cobalt binder. The toughness and hardness were improved and a hardness gradient was formed. It is the high-temperature, high-pressure N2 that enables closure of holes, thereby alleviating defects and prolonging tool life.