Nb和N对Fe-Cr13-C堆焊层金属耐磨性能的影响

Nb和N对Fe-Cr13-C堆焊层金属耐磨性能的影响 Effect of niobium and nitrogen on the wear resistance of Fe-Cr13-C hardfacing alloy 冒志伟 MAO Zhiwei 1 2 first-author 杨可 YANG Ke 1 2 李嘉琪 LI Jiaqi 1 2 徐亮 XU Liang 1 2 王秋雨 WANG Qiuyu 1 2 包晔峰 Bao Yefeng 1 2 河海大学机电工程学院 河海大学机电工程学院 College of Mechanical and Electronic Engineering,Hohai University College of Mechanical and Electronic Engineering,Hohai University 南通河海大学海洋与近海工程研究院 南通河海大学海洋与近海工程研究院 Nantong Ocean and Coastal Engineering Research Institute,Hohai University Nantong Ocean and Coastal Engineering Research Institute,Hohai University 在Fe-Cr13-C耐磨堆焊焊条药皮中加入Nb和N进行合金化并进行堆焊试验。采用光学显微镜、扫描电镜观察堆焊层金属的显微组织;利用滑动摩擦磨损试验机测试堆焊层金属的耐磨性能,研究Nb和N对Fe-Cr13-C堆焊层金属耐磨性能的影响。结果表明:堆焊层金属中铌和氮的加入能细化马氏体,并且使析出相分布更未均匀,具有明显的细晶强化和析出强化作用,硬度提高约25%;使摩擦磨损磨痕最大深度减小约72%,平均磨痕截面积减小约81%,耐磨性能得到显著提高。 Nitrogen and niobium were added into the coating of Fe-Cr13-C hardfacing electrode for alloying, and then the hardfacing test was performed. The microstructure of hardfacing layer metal was observed by optical microscope and scanning electron microscope. Moreover,the wear resistance property of hardfacing layer metal was tested by sliding friction wear tester, and the effect of niobium and nitrogen on the wear resistance property of Fe-Cr13-C hardfacing alloy metal was studied. The results show that the addition of niobium and nitrogen in the hardfacing layer alloy can refine martensite and make the precipitation phase distribu-tion more uniform. It has obvious fine grain strengthening effect and precipitation strengthening effect. The hardness of the hardfacing alloy increased by about 25%;the maximum depth of the wear scar reduced by about 72%,and the average cross-sectional area of wear scar reduced by about 81%. The wear resistance of the hardfacing alloy improves significantly. 合金化 堆焊 显微组织 耐磨性 alloying hardfacing microstructure wear resistance TG455 国家重点研发计划资助项目(2017YFE0100100);国家自然科学基金(51101050) 2022-03-08 8 50