Adherent coating on gradient cemented carbide with ultrafine Ti(C_(0.5),N_(0.5))

作     者：Tian-En Yang Lan Sun Ji Xiong Zhi-Xing Guo Lei Wang Ding Cao 

作者机构：School of Manufacturing Science and Engineering Sichuan University Institute of System Engineering Chinese Academy of Engineering Physics 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2015年第34卷第6期

页      面：413-420页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51074110) Research Funds for the Central Universities(No.2011SCU11038) the Chengdu Science and Technology Project(Nos.10GGZD080GX-268 and 11DXYB096JH-027) 

主　　题：Gradient cemented carbide UltrafineTi(C0.5,N0.5) Vacuum sintering Transverse rupturestrength Cutting performance 

摘      要：Gradient cemented carbide is usually employed as the snbstrate for coated carbide insert. In this work, gradient cemented carbide with ultrafine Ti（C0.5,N0.5） was prepared and its microstructure and properties were researched. Moreover, this novel substrate was coated to investigate cutting performance. It is found that the average WC grain size in the gradient zone is larger than that in the bulk. Owing to ultrafine Ti（C0.5,N0.5） introduction, gradient cemented carbide prepared by vacuum sintering exhibits full densification. By contrast, the gradient cemented carbide with ultrafine Ti（C0.5,N0.5） shows higher transverse rupture strength （TRS） and hardness than the homogenous one. Gradient cemented carbide suffers small TRS reduction after coating, and the bonding between coatings and gradient substrate is tidy and compact. The coated gradient cemented carbide shows much better endurance and impact resistance than the coated homogenous one. It confirms the superiority of gradient cemented carbide when used as the substrate for coating inserts.