1Cr18Ni9Ti不锈钢表面氩弧熔覆WC/Ni基涂层组织及耐磨性

Microstructure and Wear Resistance of WC/Ni Coating on 1Cr18Ni9Ti Stainless Steel by Argon Arc Cladding

利用氩弧熔覆技术在1Cr18Ni9Ti不锈钢表面制备出WC增强镍基熔覆涂层以提高其耐磨性能。利用XRD、OM及SEM分析涂层的组织结构;利用显微硬度仪及摩擦磨损试验机测试涂层的性能。结果表明:在熔覆电流为110 A时,熔覆速度为120 mm/min时,熔覆涂层表面成形良好,无缺陷产生;熔覆涂层物相主要由WC、W_(2)C、γ-Ni组成;涂层中颗粒相数量随WC粉末质量分数的增加而增多;当WC质量分数为20%时,涂层具有较高的显微硬度,平均硬度可达622 HV,而磨损质量仅为11.23 mg,氩弧熔覆WC/Ni基涂层提高了1Cr18Ni9Ti钢表面的耐磨性能。

In order to improve the surface wear resistance of 1Cr18Ni9Ti stainless steel,Ni-based cladding coating reinforced by WC particle was prepared on the surface of 1Cr18Ni9Ti stainless steel by means of argon arc cladding technique.The phase composition and the microstructure of the coating was analyzed by XRD,optical microscope and scanning electron microscope.The properties of the coating were tested by microhardness tester and friction and wear tester.The results showed that when the cladding current was 110 A and the cladding speed was 120 mm/min,the surface of the cladding coating was good and without defects.The phase of cladding coating was mainly composed of WC,W_(2)C andγ-Ni.With the increase of WC content of cladding powder,the particle phase in the microstructure of cladding coating increased.When the mass fraction of WC was 20%,the coating had high microhardness,the average hardness was 622 HV,and the wear quality was only 11.23 mg.The wear resistance of 1Cr18Ni9Ti steel surface was improved by argon arc cladding WC/Ni based coating.