W_9Mo_3Cr_4V钢脉冲放电强化涂层激光熔覆的研究  

Laser Cladding Study of a Pulse Discharge Enhanced Layer for W 9Mo 3Cr 4V Steel

作　　者：沈德久[1,2] 苑辉[1,2] 南云 乔桂英[1,2] 王玉林 郑启光[1,2] 辜建辉 王涛[1,2] 陶星之 

机构地区：[1]燕山大学材料工程学院 [2]华中理工大学激光院

出　　处：《中国激光》1998年第4期374-376,共3页Chinese Journal of Lasers

基　　金：华中理工大学激光技术国家重点开放实验室资助

摘　　要：采用ＸＲＤ和ＴＥＭ等现代分析手段研究了Ｗ９Ｍｏ３Ｃｒ４Ｖ高速钢脉冲放电ＹＧ８强化涂层激光熔覆后的组织与表面硬度变化。结果表明，经适当的激光熔覆后，试样表面硬度可达ＨＶ０．１１６００～１８００。分析认为，获得如此高硬度的主要原因是Ｗ２Ｃ和ＷＣ等高硬相及纳米晶组织的形成。After laser cladding, the microstructure and surface hardness of a YG8 pulse discharge coating for W 9Mo 3Cr 4V high speed steel were studied by means of XRD and TEM, etc. The results showed that the surface hardness of the coating could come up to HV 0.1 1600￣1800 after it was laser cladded. It is thought that formation of higher hard phases, such as W 2C, and nanometer crystal microstructure is mainly responsible for so high coating hardness.

关 键 词：激光熔覆 YG8 放电涂层 高速钢 

分 类 号：TG161.99[金属学及工艺—热处理] TG142.45[金属学及工艺—金属学]