堆焊电流对Fe-Cr-Ti-C堆焊层组织性能的影响  

Effect of surfacing current on microstructure and properties of Fe-Cr-Ti-C alloy surfacing layer

作　　者：刘政军[1] 李乐成[1] 武小娟[1] 赵福冬[1] 王初傲[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2013年第3期263-267,共5页Journal of Shenyang University of Technology

基　　金：辽宁省教育厅基金资助项目(2008S164);沈阳市科技攻关资助项目(10812299-1-00)

摘　　要：为了分析堆焊电流对堆焊层组织和性能的影响规律,研究在不同堆焊电流下堆焊层的组织构成和耐磨性能,探讨不同堆焊电流对原位合成M7C3、TiC陶瓷硬质相的影响规律,采用x-射线衍射仪(XRD)、扫描电镜(SEM)和能谱分析仪(EDS)对堆焊层显微组织进行分析,采用维氏硬度计、洛氏硬度计和湿砂磨损试验机对堆焊层的力学性能进行检测.结果表明,在堆焊速度为20 mm/min、堆焊电流为150 A时由马氏体、奥氏体、TiC、M7C3和CrFe7C0.45构成的堆焊层组织,其抗磨损性能最佳,堆焊层表面的硬度为HRC 65.4,磨损量为1.13 g;堆焊电流在160 A时,没有形成初生M7C3陶瓷硬质相,堆焊层耐磨性能下降.In order to determine the effect of Fe-Cr-Ti-C alloy wear-resistant surfacing layer, surfacing current on the microstructure and properties of the microstructure and wear resistance of the surfacing layer under different surfacing current were studied, and the influence of surfacing current on in-situ synthesis of M C3 and TiC ceramic hard phases was investigated. The mechanical properties of the surfadng layer were detected with x-ray diffractometer （XRD）, scanning electron microscope （SEM）, energy dispersive spectrometer （EDS）, Vickers hardness tester, Rockwell hardness tester and wet sand wear tester. The results show that with the surfacing speed of 20 mm/min and surfacing current of 150 A, the microstructure of the surfacing layer consists of martensite, austenite, TiC, MTC3 and CrFe7C0.45 phases, and exhibits the optimum wear resistance. In addition, the surface hardness of the surfacing layer is 65.4 HRC, and the wear loss is 1.13 g. When the surfacing current is 160 A, no primary M7C3 ceramic hard phase forms, and thus, the wear resistance of the surfacing layer decreases.

关 键 词：堆焊电流 陶瓷硬质相 碳化钛 铁铬碳化物 堆焊层 耐磨性 等离子弧 原位合成 

分 类 号：TG455[金属学及工艺—焊接]