材料工程Issue(5)：20-23,29,5.
等离子原位合成Fe-Cr-V-C堆焊合金的耐磨性
Wear Resistance of In-situ Fe-Cr-V-C Hardfacing Alloys Fabricated by Plasma Transferred Arc Weld-surfacing Process
摘要
Abstract
Fe-Cr-V-C hardfacing alloys with different Cr contents were prepared under plasma transferred arc (PTA). The phases constitution, carbide morphology were investigated by means of scanning electron microscopy(SEM) and X-ray diffraction (XRD). The effect of Cr contents on the wear resistance of hardfacing alloys was detected by using Rockwell hardometer and wear testing machine. In addition, the abrasion wear mechanism was discussed. The results show that the microstructure consists of martensite, ferrite and austenite, carbides such as primary M7C3, VC. As the Cr contents increase, the wear resistance first decreases because of the little changes of content and morphology for M7C3 and VC hard phases and the decrease of acicular martensite with high hardness, afterwards, the wear resistance increases when Cr content reaches a particular value as a result of the increase of M7C3 contents. When Cr mass fraction is 27. 2%, a high volume fraction of hexagonal (Fe,Cr,V)rC3 complex carbides and a small amount globular VC particles in the microstructure form a substantial wear resistant structure, which leads to an excellent wear resistance.关键词
Fe-Cr-V-C合金/组织/耐磨性/碳化物/硬度Key words
Fe-Cr-V-C alloy/microstructure/wear resistance/ carbide/hardness分类
通用工业技术引用本文复制引用
宗琳,刘政军,李乐成..等离子原位合成Fe-Cr-V-C堆焊合金的耐磨性[J].材料工程,2012,(5):20-23,29,5.基金项目
辽宁省教育厅科学技术研究资助项目(L2010433) （L2010433）
