Microstructure evolution and formation mechanism of raded cemented carbide with cubic-carbide-free layer prepared with TiN or Ti(C,N)free powder mixture
(0) The graded cemented carbide with cubic-carbide-free layer(CCFL)in the surface layer is synthesized by employing TiN or Ti(C,N)free initial powder mixture as well as nitridation-denitridation sintering procedure.Six types of alloy samples at different nitridation and denitridation sintering stages are prepared via interruption of sintering procedure at a certain temperature and direct cooling in furnace.Subsequently,the microstructure.element distribution and phase composition of these samples are analyzed by SEM,EPMA,XRD techniques respectively.Moreover.the microstructure evolution during nitridation and denitridation sintering stages is investigated,the formation mechanism of CCFL and Co-enriched layer are analyzed.The research results contribute to illuminate the formation process of CCFL,also offer instruction for adjusting the starting mixture composition and sintering procedure in a positive direction.
Microstructure evolution Formation mechanism Graded cemented carbide Cubic-carbide-free Layer (CCFL)
Liuyong Shi Jinwei Yang Jihua Huang Teng Zhou Xianman Zhang Yan Zhang
Mechanical and Electrical Engineering College,Hainan University,Haikou 570228,China School of Materials Science and Engineering,University of Science and Techology Beijing,Beijing 1000
国内会议
第七届全国地方机械工程学会学术年会暨海峡两岸机械科技学术论坛
海南文昌
英文
376-384
2017-10-18（万方平台首次上网日期，不代表论文的发表时间）