标题:Effect of Mo addition mode on the microstructure and mechanical properties of TiC–high Mn steel cermets
作者:Li, Guoping ;Jia, Jixiang ;Lyu, Yinghai ;Zhao, Jiazheng ;Lu, Jing ;Li, Yimin ;Luo, Fenghua
作者机构:[Li, Guoping ;Zhao, Jiazheng ;Lu, Jing ;Li, Yimin ;Luo, Fenghua ] State Key Laboratory of Powder Metallurgy, Central South University, Changsha; 41008 更多
通讯作者:Luo, Fenghua
来源:Ceramics International
出版年:2020
卷:46
期:5
页码:5745-5752
DOI:10.1016/j.ceramint.2019.11.023
关键词:Fe–Mo pre-alloyed powder; High manganese steel; Metallic binder; TiC composite
摘要:In TiC- and Ti(C,N)-based cermets, the wettability of the ceramic phase with the metallic binder is commonly increased through supplementation with Mo in the form of pure Mo powder or Mo2C. Herein, TiC–high Mn steel cermets were fabricated by conventional powder metallurgy techniques using Fe–Mo pre-alloyed powders as binders to guarantee uniform Mo distribution, and the cermet preparation process was optimized and investigated in detail. The microstructures of the thus obtained cermets were observed by scanning electron microscopy and compared to those of a Mo-free cermet and a cermet prepared using pure Mo powder. The grain size of Fe–Mo powder cermets exceeded that of the Mo-free cermet but was much smaller and more homogeneous than that of the Mo powder cermet. For Fe–Mo powder cermets, angular and tetragonal TiC particles were observed at Mo contents of <1.2 wt%, while round shapes became dominant at higher Mo contents. The hardness of Fe–Mo powder cermets increased with increasing Mo content, as did transverse rupture strength, which was maximal (2264 MPa) at a Mo content of 2.4 wt%, while impact toughness was maximal (11.2 J/cm2) at a Mo content of 1.2 wt%. The above values exceeded those reported for similar conventional cermets, and the use of Fe–Mo pre-alloyed powder as a metallic binder was therefore concluded to be an attractive strategy of increasing the strength and toughness of TiC–high Mn steel cermets. © 2019 Elsevier Ltd and Techna Group S.r.l.
收录类别:EI;SCOPUS
Scopus被引频次:1
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075332444&doi=10.1016%2fj.ceramint.2019.11.023&partnerID=40&md5=4bac16bd94ae0d1b6c07d2055047267c
TOP