Fe-C-Mo-V堆焊合金的滚动三体磨粒磨损行为研究

通过熔化极气体保护焊技术制备了Fe-C-Mo-V堆焊合金磨损试样,基于滚动三体磨粒环境下进行了干砂橡胶轮磨损试验,利用扫描电子显微镜、能谱分析、维氏硬度计等显微分析和性能测试方法,对Fe-C-Mo-V堆焊合金熔敷金属的磨损失重和磨痕形貌进行检测与表征,研究了不同法向载荷条件下该熔敷金属的磨损行为变化规律。结果表明:随法向载荷的增加,磨损失重逐渐增加,但增幅逐渐变缓;磨损机制主要为磨粒对奥氏体基体的切削及VC硬质相和层片状合金碳化物的破碎剥落;磨损后表面硬度随法向载荷的增大逐渐增加,磨痕亚表面产生显著的加工硬化,奥氏体基体转变为马氏体组织,材料的硬度增强,使得熔敷金属在高载荷下表现出较好的耐磨性。

Study of abrasive wear behavior of Fe-C-Mo-V hardfacing alloys in rolling three-body abrasive system

Fe-C-Mo-V hardfacing alloys wear samples are prepared by GMAW welding technology.Dry sand abrasive wear tests are carried out based on the rolling three-body abrasive environment,and scanning electron microscope,energy spectrum analysis,Vickers hardness tester and other microscopic analysis and performance testing methods have been used to detect and characterize the wear loss and wear scar morphology of the FeC-Mo-V hardfacing alloy deposited metal.The changes in wear behavior of the deposited metal under different normal load conditions are studied.The results show that with the increase of normal load,wear loss gradually increases,but the increase gradually slows.The wear mechanism of the hardfacing alloy is the plowing effect on the austenite matrix by abrasive grains,and the VC hard phase,lamellar eutectic structure to flake.After the wear,the surface hardness increases gradually with the increase of normal load,and the subsurface of the wear mark produces significant work hardening,and the austenite matrix transforms into martensite structure,which enhances the hardness of the material and makes the deposited metal exhibit good wear resistance under high load.