C含量对Fe-Mo-V堆焊合金组织性能的影响  

Effect of C Content on Microstructure and Properties of Fe-Mo-V Hardfacing Alloy

作　　者：张永生 段嘉旭 赵文礼 高站起 王旭 ZHANG Yongsheng;DUAN Jiaxu;ZHAO Wenli;GAO Zhanqi;WANG Xu(Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China;Cangzhou Lingang Jinyu Cement Co.,Ltd.,Cangzhou 061109,China)

机构地区：[1]郑州机械研究所有限公司,河南郑州450001 [2]沧州临港金隅水泥有限公司,河北沧州061109

出　　处：《电焊机》2024年第3期43-47,共5页Electric Welding Machine

基　　金：2022年度河南省重大科技专项(201ZP20220010)。

摘　　要：采用电弧熔覆Fe-Mo-V-C药芯焊丝在Q235钢基体上制备耐磨堆焊层。通过光学显微镜(OM)、扫描电镜及能谱仪(SEM-EDS)等研究了熔敷金属微观组织,采用X射线衍射仪(XRD)对熔敷金属物相进行标定,利用销盘磨损试验分析熔敷金属耐磨性。结果表明:当C元素含量增加时,熔敷金属中形成了大量的细小VC硬质相以及网格状的Mo-Fe-C化合物,提高了熔敷金属的耐磨性;熔敷金属中首先形成的VC硬质相起到异质形核、细化晶粒和钉扎位错的作用;Mo元素以Mo-Fe-C白色枝晶形式存在于熔敷金属中,起到细化晶粒增强基体耐磨性能的作用。The wear-resistant surfacing layer was prepared by arc cladding Fe-Mo-V-C flux cored wire on Q235 steel substrate.The microstructure of the deposited metal was studied by optical microscope(OM)and scanning electron microscope.The phase of the deposited metal was calibrated by X-ray diffraction(XRD).The wear resistance of the deposited metal was analyzed by pin on disk wear test.The results show that when the content of C element increases,a large number of fine VC hard phases and mesh-like Mo-Fe-C compounds are formed in the deposited metal,which improves the wear resistance of the deposited metal;The VC hard phase formed first in the deposited metal plays the role of heterogeneous nucleation,grain refinement and pinning dislocation;Mo element exists in the deposited metal in the form of Mo-Fe-C white dendrite,which plays a role in refining the grain and enhancing the wear resistance of the matrix.

关 键 词：电弧熔覆 钼钒合金 碳含量 VC硬质相 

分 类 号：TG455[金属学及工艺—焊接]