沈阳工业大学学报2011，Vol.33Issue(4)：382-386,393,6.
等离子熔覆铁基堆焊合金显微组织与耐磨性
Microstructure and wear resistance of plasma clad Fe-based hardfacing alloy
摘要
Abstract
In order to improve the wear resistance of machine parts subjected to severe operating conditions,a series of Fe-15Cr-xV-0.8C hardfacing alloys were prepared on the surface of 20 g steel with with a plasma cladding technology.The microstructures of the alloys and the morphologies of carbides were investigated by means of optical microscopy（OP）,scanning electron microscopy（SEM） and X-ray diffractometer（XRD）.The results show that the microstructure of the hardfacing alloys consist of martensite,ferrite,small amount of austenite as well as M7C3 and VC phases.The addition of V element into the hardfacing alloys can induce the martensitic transformation of the matrix and improve the wear resistance of the alloys.With increasing the mass fraction of V element,the amount of VC phase increases,and the grains inside the hardfacing alloys get remarkably refined.In addition,the effect of V content on the hardness and wear resistance of the hardfacing alloys was examined.The results of abrasive wear resistance experiments indicate that the hardfacing alloys have excellent wear resistance.When large amount of hardening phases uniformly distribute and the grain size is moderate in the hardfacing alloys,the micro-cutting movement of abrasive particles can be effectively prevented,and the wear resistance of the alloys can be enhanced obviously.关键词
等离子弧/堆焊/组织/耐磨性/Fe-15Cr-xV-0．8C合金/碳化物/硬度/磨损机制Key words
plasma arc/hardfacing/microstructure/wear resistance/Fe-15Cr-xV-0. 8C alloy/carbide/hardness/wear mechanism分类
通用工业技术引用本文复制引用
宗琳,刘政军,高海亮,李乐成..等离子熔覆铁基堆焊合金显微组织与耐磨性[J].沈阳工业大学学报,2011,33(4):382-386,393,6.基金项目
辽宁省教育厅重点实验室资助项目 （）
沈阳市科技计划资助项目（10812299-1-00/20082647-2）. （）
