合金结构钢30CrMo激光熔覆组织的研究  

Investigation on Microstructure of the Coatings on the Surface of 30CrMo Alloy Structure Steel by Laser Cladding

作　　者：郑飞跃[1] 徐经梅[1] 葛凡[1] 

机构地区：[1]杭州电子科技大学理学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2006年第3期88-90,共3页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：杭州电子科技大学科学研究基金(KYF091504022)

摘　　要：以波长为1.06μm，功率密度为10～20kw／cm^2的Nd：YAG脉冲激光器的聚焦光束为热源，对30CrMo合金结构钢的表面进行Ni基合金的熔覆处理。用扫描电镜和能谱仪观察和分析了熔覆层的显微组织及成分。结果表明，涂层致密无裂纹。在微观结构上，涂层由表及里形貌不同，存在粗大枝晶区、柱状枝晶区和基体3个不同区域，它的相组成为马氏体、奥氏体及花状WC晶体。The surface of 30CrMo alloy structure steel was clad with Ni base alloy powder by using the wave length 1.06μm, 10 - 20kW/cm^2 power density focusing pulsed Nd： YAG laser beam as heating source. By means of energy spectrometer and scanning electron microseope, the microstructure of the coating was investigated, The resuhs show that compact and cracks- free coating which from the exterior to the interior is divided into thick dendritic zone, styloid dendritic zone and matrix material zone. Its phases are composed of martensite, austenite and flowerlike WC crystal.

关 键 词：合金结构钢 激光熔覆 显微组织 

分 类 号：TG156.99[金属学及工艺—热处理]