超硬高速钢的表面冶金工艺研究  

Study on Surface Metallurgical Technology of Superhard High Speed Steel

作　　者：刘沙沙[1] 陈志勇[1] 李忠厚[1] 

机构地区：[1]太原理工大学表面工程研究所,山西太原030024

出　　处：《热加工工艺》2007年第20期56-58,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(50571074)

摘　　要：利用双辉等离子渗金属技术在低合金钢20CrV2表面进行W-Mo-Co多元共渗及等离子渗碳复合处理,使合金层接近钴系超硬高速钢成分。研究了合金钢的表面冶金工艺和渗层组织状态、渗层成分分布以及渗金属工艺参数对渗层厚度和渗层成分分布的影响。结果表明,表层W、Mo、Co的含量(质量分数)可分别达到11%、6%、13%,渗层形成的主要相为α相、金属间化合物(μ相)以及三种合金碳化物。The composition similar to cobalt- superhard high speed steel may be formed on the surface of low alloy steel 20CrV2 by tungsten-molybdenum-cobalt plasma surface alloying and following plasma carbonizing. The surface metallurgical technology, the structure and distribution of composition in alloying layer, the influences of technological parameters on thickness of alloying layer and distribution of composition were investigated. The results indicate that W, Mo, Co contents（wt） in the surface layer may reach 11% ,6%, 13%, respectively. The X-ray analyses show that the alloying layer is comprised of α phase, intermetellic compound （μ phase） and three kinds of alloy carbide.

关 键 词：超硬高速钢 等离子渗金属 表面冶金 

分 类 号：TG156.8[金属学及工艺—热处理] TG142.45[金属学及工艺—金属学]