碳钢表面高铬耐磨合金层的制备及其组织与性能  

Microstructure, Preparation and Properties of Alloying Layer of High Chromium Wear-resistant on Carbon Steel

作　　者：高原[1] 徐晋勇[1] 高清[1] 成均[1] 徐重[2] 

机构地区：[1]桂林电子科技大学信息材料科学与工程系,广西桂林541004 [2]太原理工大学表面工程研究所,山西太原030024

出　　处：《机械工程材料》2006年第11期25-28,共4页Materials For Mechanical Engineering

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)

摘　　要：采用双层辉光等离子渗金属技术先在Q235钢和45钢表面渗入元素铬,形成高铬合金层;然后进行等离子渗碳,得到高铬耐磨合金层;对渗铬、渗碳层的组织和性能进行研究。结果表明:表面层铬含量达到40％以上,且呈梯度分布;渗层所形成的含铬碳化物弥散、细小和均匀,表面含碳量达2．8％以上,没有共晶莱氏体组织;经淬火及回火处理后,表面硬度达到1 800 HV以上;与淬火GCr15钢相比,其耐磨性能提高7倍以上。Plasma chromizing was achieved on Q235 steel and 45 steel surface and formed high chrome layer. Then plasma carburizing was proceed on alloyed high chromium layer. The results show the surface chromium composition content is more than 40% and the chromium elements are infinity dissolved into α-Fe. The chromium composition of alloyed layer distribute fiat and grads. The carbonization of alloyed layer is secondly carbides from solid. The carbides are dispersion, thin, uniformity. The surface carbon content is morn than 2. 8%. There is no ledeburite on alloyed layer. The surface hardness in alloyed layer is 1 800 HV after quenching and tempering. The wear resistant is 7 times than GCr15 steel.

关 键 词：双层辉光等离子渗金属 等离子渗铬 莱氏体 碳化物 

分 类 号：TG156[金属学及工艺—热处理]