摘要
采用等离子表面合金化技术，在20钢表面渗铬，并进行双辉等离子渗碳，形成高铬高碳合金层．利用GDS、XRD、OM、SEM研究了合金层成分、相组成及组织形貌。并通过摩擦试验对合金层耐磨性进行了分析．研究结果表明：表面高碳高铬层含铬量和含碳量以及碳化物的质量分数（40％以上）高于一般冶金高铬铸铁；渗层主要包含M23C6和M7C3型碳化物。这些碳化物均匀弥散分布，尺寸通常在1μm左右，并无共晶碳化物组织；合金层表面显微硬度达到1000—1600HV，耐磨性比GCrl5轴承钢提高8．6倍．
The high chromium and carbon alloying layer on 20 steel surfaces was made by plasma surface alloying and carburization. The chemical composition, phase structure and microstructure of the alloying layer were investigated using GDS, XRD, OM and SEM, and its wear resistance was analyzed by a friction test. The results show that the concentrations of chromium and carbon as well as the mass percentage of carbides （more than 40 % ） in diameter, distributing the alloying layer were higher than those of integral cast irons; carbides with about 1 μm in the alloying layer, were mainly composed ture was found in the layer; the micro-hardness value of the resistance increased 8.6 times compared with GCrl5 steel. of M23 C6 and M7C3 and no eutectic strucalloying layer was 1000 - 1600HV and the wear
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2006年第3期251-253,257,共4页
Materials Science and Technology
基金
国家自然科学基金
上海宝钢集团公司联合资助项目(50374050)
山西省自然科学基金资助项目(20031050)
关键词
渗铬
等离子渗碳
碳化物
耐磨性
共晶碳化物
chromizing
plasma carburization
carbides
wear resistance
eutectic carbides
