WC对铁基合金喷焊层组织及磨损性能的影响  

Effect of WC on the microstructure and the wear resistance of Fe-based spray-welding coating

作　　者：熊中 王艳[1] 徐强[1] 何芹[1] 高宇[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《电焊机》2016年第12期104-107,共4页Electric Welding Machine

基　　金：四川省教育厅重点项目(13ZA0030);汽车高性能材料及成形技术四川省高校重点实验室开放基金(SZJJ2015-090);2015省级大学生创新创业训练计划(201510623002);西华大学2016研究生创新基金(YCJJ2016140)

摘　　要：采用等离子喷焊技术在Q235表面制备铁基合金喷焊层,借助X射线衍射分析、金相显微镜以及摩擦磨损实验,研究一定含量的WC对铁基合金喷焊层组织及磨损性能的影响。结果表明:铁基合金喷焊层主要由α-Fe,γ-Fe,(Fe,Cr)_7C_3和(Fe,Ni)固溶体等物相组成,加入WC后,出现了(Fe,Cr)_(23)C_6,WC,W_2C等新物相。未加入WC的喷焊层出现了疲劳剥落,数量较多、较深且平直的犁沟,表现为粘着磨损和磨料磨损;加入WC后疲劳剥落减弱,犁沟减少,表现为磨料磨损。喷焊层中硬质相的弥散强化作用提高了硬度和耐磨性。The Fe-based alloy spray welding coating on Q235 substrate by plasma spray-welding process has been prepared. The effect of certain content of WC on the microstructure and tribological properties of Fe-based alloy spray welding coating has been studied by means of metallurgical microscope, X-ray diffraction analysis and friction and wear test. The results indicate that the coating is mainly composed of α-Fe, γ-Fe, （Fe, Cr）7C3 and soild solution （Fe, Ni）. The new phases such as （Fe, Cr）23Cr, WC and W2C have emerged when the addition amount of WC. The spray welding coating without WC appears fatigue spalling,more quantity,deep and straight furrows, which mainly present as adhesive wear and abrasive wear. After adding WC ,fatigue spalling weakens and furrows reduce,adhesive wear and abrasive wear get more slightly, the wear resistance of spray welding coating has been improved obviously. The hardness and the wear resistance are improved by the dispersion strengthening effect of the hard phase in the spray welding layer.

关 键 词：等离子喷焊 碳化钨 铁基合金 磨损性能 

分 类 号：TG456[金属学及工艺—焊接]