Fabrication and mechanical properties of ultrafine grained WC-10Co-0.45Cr3C2-0.25VC alloys

被引：24
作者：
Ou, X. Q. [1 ]
Song, M. [1 ]
Shen, T. T. [1 ]
Xiao, D. H. [1 ]
He, Y. H. [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2011年 / 29卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Ultrafine WC-Co alloys; Microstructure; Mechanical properties; NANOSTRUCTURED WC-CO; TUNGSTEN CARBIDE; CEMENTED CARBIDES; WC-11CO COMPOSITES; POWDER; GROWTH; DENSIFICATION; HARDMETALS; TOUGHNESS; MICROSTRUCTURE;
D O I：
10.1016/j.ijrmhm.2010.11.004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The ultrafine grained WC-10Co-0.45Cr(3)C(2)-0.25VC alloys were fabricated through planetary ball milling and low pressure sintering. The effects of the cobalt particle size, milling speed and sintering temperature on the microstructure, hardness and fracture toughness of the ultrafine grained alloys were investigated using optical microscopy, scanning electron microscopy and mechanical testing. The results showed that the mechanical properties of the low pressure-sintered alloys substantially depend on the milling speed and sintering temperature. At the same time, the hardness and fracture toughness of the samples can be increased from 1703 MPa and 8.90 MN m(-3/2) to 1789 MPa and 11.21 MN m(-3/2), respectively, when the cobalt particle size is reduced from 17 mu m to 1.4 mu m. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：260 / 267
页数：8
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