马氏体气阀钢多元共渗层的组织及性能  

Microstructure and Properties of the Polynary Coatings Co-diffused on Martensitic Valve Steel

作　　者：李铜桥[1] 魏国亮[1] 

机构地区：[1]海军驻哈尔滨汽轮机厂有限责任公司军代表室,黑龙江哈尔滨150046

出　　处：《材料开发与应用》2009年第1期4-7,共4页Development and Application of Materials

摘　　要：用固体粉末法,在4Cr10Si2Mo马氏体气阀钢表面制备了Al-Cr二元渗层及Al-Cr-Ce三元渗层,研究了渗层的显微组织和成分分布,测定了渗层由表及里的显微硬度。Al-Cr渗层厚度约为350μm,硬度为580Hv;Al-Cr-Ce渗层厚度约为420μm,硬度为500Hv。Al - Cr binary layers and Al - Cr - Ce ternary layers coatings have been deposited on the surface of martensitic valve steel 4Cr10Si2Mo by solid powder method. The microstructure of the coatings and the element distribution in the coatings were characterized by using XRD and EDS, and their microhardness value was detected from surface layer to the substrate. The result indicated that the Al -Cr binary diffusing layers have a thickness of 3501μm and a micro hardness about 580Hv, the Al -Cr- Ce ternary diffusing layers present a thickness of 420μm and a micro hardness about 500Hv.

关 键 词：气阀钢 Al-Cr二元渗层 Al-Cr-Ce三元渗层 显微组织 显微硬度 渗层厚度 

分 类 号：TG156.88[金属学及工艺—热处理]