Effect of VC and NbC additions on microstructure and properties of ultrafine WC-10Co cemented carbides

被引：52
|
作者：
Xiao Dai-hong [1 ]
He Yue-hui [1 ]
Luo Wei-hong [2 ]
Song Min [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Hunan Import & Export Co Chinese Automobile Ind, Changsha 410001, Hunan, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2009年 / 19卷 / 06期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
ultrafine WC-10Co cemented carbide; VC; NbC; microstructure; mechanical properties; GRAIN-GROWTH INHIBITION; WC-CO HARDMETALS; TUNGSTEN CARBIDE; MECHANICAL-PROPERTIES;
D O I：
10.1016/S1003-6326(09)60063-7
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The nanocomposite WC-Co powders were prepared through planetary ball milling method. Effects of grain growth inhibitor addition and the vacuum sintering parameters on the microstructure and properties of ultrafine WC-10Co cemented carbides were investigated using X-ray diffractometer, scanning electron microscope and mechanical property tester. The results show that VC and NbC additions can refine the WC grains, decrease the volume fraction of Co3W3C phase in ultrafine WC-10Co cemented carbides, and increase the hardness and fracture toughness of the base alloys. After sintering for 60 min at 1 400 degrees C, the average grain size and hardness of ultrafine-grained WC-10Co-1VC cemented carbide are 470 nm and HRA 91.5, respectively. The fracture toughness of cemented carbide WC-10Co-1NbC alloy is over 7 MN.m(-3/2).
引用
收藏
页码：1520 / 1525
页数：6
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