作　　者： ; ; ; ; ;

机构地区： 太原理工大学材料科学与工程学院表面工程研究所

出　　处： 《材料科学与工艺》 2004年第6期650-653,共4页

摘　　要： 采用双层辉光离子渗金属技术,在工业纯铁和20钢表面进行W、Mo、Co多元共渗,形成Fe W Mo Co型渗镀复合层.对渗镀层进行了金相组织观察、成分及硬度测量,重点研究了镀层的相组成及镀层与基体间的结合强度.结果表明:纯铁和20钢表面镀层以金属钨、钼为基体,其上分布大量μ相,并有少量Laves相;镀层硬度高达1000～1400HV,固溶和时效处理对硬度提高影响不大;纯铁表面镀层在渗金属、固溶、时效状态下,持续加载100N未发生镀层剥落现象;20钢表面镀层经固溶处理后,所加载荷在100N内未发生剥落现象,但在渗金属及时效态,当载荷加至80N时,镀层开始剥落. Diffusion and deposition compound layers of Fe-W-Mo-Co were formed on the surface of ingot iron and 20 steel by means of the double glow plasma surface alloying technique. The results show that the deposition layers on the two kinds of steels consist of tungsten and molybdenum matrix with a large amount of precipitates(μ phase and a few Laves phase).Hardnesses of the deposition layers were 1 000-1 400HV and subsequent solution and aging treatments could not improve them significantly. The deposition layer-substrate bonding strengths were evaluated by scratch method. The layer on ingot iron shows no delamination below 100　N at alloying, solution and aging states. The layer on 20 steel also reveals no spallation below 100 N at solution state, but it flakes away at 80 N at alloying and ageing states.

关 键 词： 钢 固溶 金属 表面 多元共渗 相 时效 镀层硬度 复合层 基体

领　　域： [一般工业技术] [化学工程]