20CrMo渗碳钢经渗硼和渗硼氮硫处理后的耐磨性能  

Wear Resistance of 20CrMo Carburized Steel after Boriding and Sulfur Nitrogen Boriding Treatment

作　　者：安亚君[1] 武越[1] 马壮[2] 张博[3] 

机构地区：[1]辽宁工程技术大学机械工程学院,阜新123000 [2]辽宁科技学院冶金工程学院,本溪117000 [3]辽河石油勘探局华油实业公司,盘锦124000

出　　处：《机械工程材料》2017年第4期89-93,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(U1261123);辽宁省教育厅科学研究一般项目(L2014122)

摘　　要：分别以硼铁和B_4C作为供硼剂,添加适量的供氮剂、供硫剂以及填充剂,采用粉末包埋法在20CrMo渗碳钢表面制备了渗硼层和渗硼氮硫层,分析了两类渗层的物相组成、硬度和磨损性能。结果表明:渗硼层均由Fe_2B、FeB、Fe_3C相组成,渗硼氮硫层则由Fe_2B、Fe_3N、FeS、Fe_3C相组成,未形成脆性FeB相;渗硼层和渗硼氮硫层的表面硬度、耐磨粒磨损和耐黏着磨损性能均高于渗碳钢的,且渗硼层的硬度和耐磨粒磨损性能高于渗硼氮硫层的,而耐黏着磨损性能低于渗硼氮硫层的;以硼铁为供硼剂制备的渗硼层的耐磨粒磨损性能优于以碳化硼为供硼剂的,而耐黏着磨损性能低于以碳化硼为供硼剂制备的。Using ferroboron and E4C as a boron source respectively and adding moderate nitrogen source, sulphur source and fillers, the boriding layers and sulfur nitrogen boriding layers on the surface of 20CrMo carburized steel were prepared by the powder embedding method, and then the phase composition, hardness and wear resistance of the two layers were analyzed. The results show that the boriding layers were both composed of Fe2B, FeB and Fe3C phases while the sulfur nitrogen boriding layers were composed of Fe2B, Fea N, FeS and Fe3C phases without the formation of brittle FeB phase. The surface hardness, abrasive and adhesive wear resistance of the boriding layers and the sulfur nitrogen boriding layers were all higher than those of the carburizing layer. Moreover, the surface hardness and abrasive wear resistance of the boriding layers were higher while the adhesive wear resistance was lower than those of the sulfur nitrogen boriding layers. The abrasive wear resistance of the boriding layers prepared with ferroboron as a boron source was higher while the adhesive wear resistance was lower than those with B4 C as a boron source.

关 键 词：碳化硼 渗硼层 磨粒磨损 黏着磨损 

分 类 号：TD849.5[矿业工程—煤矿开采]