高钒复合堆焊合金的耐磨性分析  

Research on wear resistance of compound material surfacing alloy with high vanadium content

作　　者：宗琳[1,2] 刘政军[2] 高海亮[2] 李乐成[2] 

机构地区：[1]沈阳化工大学机械工程学院,沈阳110142 [2]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《焊接学报》2011年第9期41-44,48,共5页Transactions of The China Welding Institution

基　　金：辽宁省教育厅重点实验室项目(2008S164);沈阳市科技攻关项目(10812299-1-00)

摘　　要：为了研制一种高钒耐磨复合材料,通过调节钒含量制备多组Fe-Cr-V-C合金,对其进行等离子弧堆焊,通过硬度和磨损试验得出合金力学性能的变化规律,利用XRD,OM和SEM分析合金的物相组成、组织形态和分布情况.结果表明,堆焊层的力学性能随着V元素含量的增加而提高,当V元素含量达到26.2%时,堆焊层的力学性能达到最佳值,其硬度为64.9 HRC,磨损量为0.078 4 g;堆焊层中碳化钒数量随V元素含量的增大而增多,并呈细小球状弥散分布在马氏体基体中,与晶界分布的断续网状的(Fe,Cr,V)7C3复合物构成耐磨骨架,从而大大提高堆焊层的耐磨性能.In order to study the wear resistant composite material with high Vanadium content,Fe-Cr-V-C alloy system was designed with plasma arc surfacing.The mechanical properties of surfacing overlays were examined with Rockwell hardometer and wear testing machine respectively.The phase composition,shape and distribution of microstructure have been researched by XRD,OM and SEM.The results showd that the mechanical properties of the surfacing overlay improved with the increasing of vanadium content.When the vanadium content was up to 26.2 percent,the mechanical properties of surfacing overlay obtained optimum value,the hardness was 64.9 HRC and the wear loss was 0.078 4 g.The numbers of vanadium carbide increased with the increasing of vanadium content.vanadium carbide particles diffused in the martensite matrix and formed wear resistant structure with(Fe,Cr,V)7C3 which distributed along grain boundaries.In a word,the property of wear resistance of surfacing overlay is very good.

关 键 词：堆焊合金 等离子弧 堆焊 耐磨性 

分 类 号：TG115.28[金属学及工艺—物理冶金]