范丽,陈海龑,刘珊珊,董耀华,董丽华,尹衍升.球形WC增强铁基复合等离子堆焊层的组织与摩擦学性能[J].摩擦学学报,2018,(1):17~27
球形WC增强铁基复合等离子堆焊层的组织与摩擦学性能
Microstructure and Tribological Properties of Fe-based Composite Coatings Reinforced by Spherical WC Particles using Plasma Transferred Arc
投稿时间:2017-08-30  修订日期:2017-11-04
DOI:10.16078/j.tribology.2018.01.003
中文关键词:  铁基复合涂层  球形WC  等离子堆焊  摩擦磨损
英文关键词:Fe-based composite coating  spherical WC  plasma transferred arc (PTA)  friction and wear
基金项目:海洋公益性行业科研专项经费项目(201405013-3),国家自然科学基金项目(51609133)和上海海事大学科研基金项目(20130448)资助.
作者单位E-mail
范丽 1. 上海海事大学 海洋科学与工程学院, 上海 201306
2. 南通航运职业技术学院 轮机工程系, 江苏 南通 226010 
 
陈海龑 上海海事大学 海洋科学与工程学院, 上海 201306 hychen@shmtu.edu.cn 
刘珊珊 上海应用技术大学 化学与环境工程学院, 上海 201418  
董耀华 上海海事大学 海洋科学与工程学院, 上海 201306  
董丽华 上海海事大学 海洋科学与工程学院, 上海 201306  
尹衍升 上海海事大学 海洋科学与工程学院, 上海 201306  
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中文摘要:
      为提高304不锈钢的摩擦学性能,将质量分数为30%和60%的球形WC添加到铁基复合粉末,采用等离子堆焊技术在其表面制备了WC增强铁基复合涂层. 分析其显微组织结构、物相和显微硬度,在恒定载荷(50 N)和滑动速度(20 mm/s)下进行干摩擦磨损试验,研究其干滑动摩擦学性能. 结果表明:富含Cr的固溶强化奥氏体、高硬度的Cr7C3和WC增强相的存在,提高了WC增强铁基堆焊层的硬度,30% WC和60% WC涂层的显微硬度达到HV0.2665和HV0.2724,比铁基涂层提高了21.1%和31.9%,是304基体的3.7和4倍;30% WC和60% WC涂层的摩擦系数和磨损率分别为0.59和2.639×10-6 mm3·N-1·m-1,0.42和1.111×10-6 mm3·N-1·m-1. 30% WC和60% WC涂层均表现出优异的耐磨性能,其磨损机理分别为黏着磨损和二体磨粒磨损的混合机制,和三体磨粒磨损.
英文摘要:
      In order to improve the wear resistance of 304 austenitic stainless steel, the Fe-based composite coatings reinforced by spherical WC particles using plasma transferred arc were prepared by adding mass fraction 30% and 60% WC to the Fe-based composite powder, and coated on 304 stainless steel. The microstructure, phase compositions, and microhardness of coatings were determined. At a load of 50 N and a sliding speed of 20 mm/s, dry sliding wear resistances of the composite coating were investigated. The results show that the presence of WC reinforced phase, Cr7C3hard phase and Cr-rich solution-strengthening austenite greatly increased the microhardness of the WC reinforced coatings. The microhardness of 30% WC and 60% WC coatings were HV0.2665 and HV0.2724, which increased by 21.1% and 31.9% as compared with the Fe-based coating, and were 3.7 and 4 times as high as that of 304 stainless steel respectively. The coefficient of friction and the wear rate were 0.59 and 2.639×10-6 mm3·N-1·m-1 for 30% WC coating and 0.42 and 1.111×10-6 mm3·N-1·m-1 for 60% WC coatings. And both 30% WC and 60% WC coatings presented excellent wear resistance. Adhesive and two-body abrasive wear were predominant for 30% WC coating, whereas three-body abrasion was the main wear mechanism for 60% WC coating.
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