Effect of solid solution treatment on microstructure and mechanical properties of hot-press CoCrW alloys

被引：0

作者：

You X. ^{[1
]}

Wang G. ^{[1
]}

Wang J. ^{[2
]}

Xu T. ^{[2
]}

Zhang H. ^{[3
]}

Wei H. ^{[3
]}

机构：

[1] School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan

[2] Military Representative Office in Factory, Xi'an

[3] Institute of Metal Research, Chinese Academy of Sciences, Shenyang

来源：

Jinshu Xuebao/Acta Metallurgica Sinica | 2016年 / 52卷 / 02期

基金：

中国国家自然科学基金;

关键词：

CoCrW alloy; Hot pressing; Mechanical property; Microstructure; Solid solution treatment;

D O I：

10.11900/0412.1961.2015.00245

中图分类号：

学科分类号：

摘要：

Co-based alloy has high strength, good corrosion and wear resistance, and is widely used in aviation industry, nuclear industry. The cast Co-based alloys has high hardness brittleness, but the toughness is low, which limits its wide use. The CoCrW alloy prepared by powder metallurgy process has high toughness, at the same time, the mechanical properties of the CoCrW alloy can be changed by heat treatment. In this work, the effect of solid solution treatment on the microstructure and mechanical properties of the hot pressed alloy was studied by SEM, XRD and TEM, hardness test, room-temperature tensile and wear experiment. The results show that the microstructure of the as-hot pressed and solid solution state CoCrW alloy are both composed of M23C6, M6C, CrCo intermetallic compounds and γ-Co matrix, the contents of M23C6 and prior particle boundaries decrease remarkably after solution treatment, meanwhile, the toughness and wear resistance of the alloy are improved. With the increase of solid solution temperature and time, the hardness and tensile strength at room temperature of CoCrW alloys in-crease first and then decrease. © All right reserved.

引用

页码：161 / 167

页数：6

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