Effects of VC/Cr3C2 on WC grain morphologies and mechanical properties of WC-6wt.%Co cemented carbides

被引：68

作者：

Chen, Hao ^{[1
,2
,3
]}

Yang, Qiumin ^{[2
,3
]}

Yang, Jiangao ^{[2
,3
]}

Yang, Hailin ^{[1
]}

Chen, Liyong ^{[2
,3
]}

Ruan, Jianming ^{[1
]}

Huang, Qizhong ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Jiangxi Univ Sci & Technol, Inst Engn & Res, Ganzhou 341000, Peoples R China

[3] Jiangxi Univ Sci & Technol, Minist Educ, Engn Res Ctr High Efficiency Dev & Applicat Tech, Ganzhou 341000, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 714卷

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 cemented carbide; Grain growth inhibitor; WC grain morphology; Mechanical properties; GROWTH INHIBITORS; WC/CO INTERFACE; CO CERMETS; VC; MICROSTRUCTURE; SEGREGATION; TEMPERATURE; EVOLUTION; VANADIUM; POWDERS;

D O I：

10.1016/j.jallcom.2017.04.187

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of VC/Cr3C2 on WC grain morphologies and mechanical properties of WC-6wt.%Co cemented carbides were studied using scanning electron microscope (SEM) and mechanical properties tests. The results showed that the morphologies of WC grains in alloys doped VC were equilateral triangle with multi-steps in basal and prismatic planes because of the V segregate at (0 0 0 1) and slightly at (1 0 (1) over bar 0) surfaces of WC grains as (V,W) Cx carbide. However, the surfaces of triangle WC grains tended to become round without multi-steps as the VC grain inhibitor was partially replaced by Cr3C2. With the addition of VC, the hardness was improved due to the decrease of WC grain size and the transverse rupture strength decreased due to the multi-steps in WC grains. Additionally, the hardness and transverse rupture strength of the alloys had a little change with the partial substitution of VC by Cr3C2. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：245 / 250

页数：6

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