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激光宽带熔覆碳化钨/钴基合金的组织与性能
引用本文:杨胶溪,闫婷,王喜兵,郭江,左铁钏,徐文清,高协清.激光宽带熔覆碳化钨/钴基合金的组织与性能[J].金属热处理,2007,32(11):26-29.
作者姓名:杨胶溪  闫婷  王喜兵  郭江  左铁钏  徐文清  高协清
作者单位:1. 北京工业大学,激光工程研究院,北京,100022
2. 江苏锡钢集团有限公司,江苏,无锡,214026
基金项目:国家重点基础研究发展计划(973计划)
摘    要:利用积分镜对激光束进行整形获得宽带激光束,进行宽带激光熔覆获得无裂纹WC/钴基合金层.对激光熔覆层用扫描电境(SEM)进行形貌观察,并进行能谱成分分析,用XRD进行合金物相表征.结果表明,熔覆层组织主要是由Co的过饱和固溶体、WC、W2C、CoCr、Cr7C3等相组成.W2C相的出现说明WC相发生了分解,WC等硬质相的存在导致熔覆层硬度的非均匀性.

关 键 词:激光宽带熔覆  积分镜  钴基合金  组织结构  激光熔覆层  宽带激光熔覆  熔覆层组织  碳化钨  钴基合金  性能  Clad  Laser  Properties  Microstructure  非均匀性  硬度  存在  硬质相  分解  发生  相组成  CoCr  过饱和固溶体  结果
文章编号:0254-6051(2007)11-0026-04
收稿时间:2007-06-20
修稿时间:2007年6月20日

Microstructure and Properties of Laser Wide-strip Clad WC/Co-Base Alloy
YANG Jiao-xi,YAN Ting,WANG Xi-bing,GUO Jiang,ZUO Tie-chuan,XU Wen-qing,GAO Xie-qing.Microstructure and Properties of Laser Wide-strip Clad WC/Co-Base Alloy[J].Heat Treatment of Metals,2007,32(11):26-29.
Authors:YANG Jiao-xi  YAN Ting  WANG Xi-bing  GUO Jiang  ZUO Tie-chuan  XU Wen-qing  GAO Xie-qing
Abstract:The round laser beam pattern was shaped into wide-strip by integral mirror.The WC/Co-base alloy was fabricated by the wide-strip laser cladding method without cracks.The morphology of laser clad layer was observed by SEM,composition analysis was applied by EDS,and the phase transformation was characterized by XRD.The results show that the main structure of laser clad WC/Co-base alloy is composed of Co supersaturated solid solution and the phases of WC,W2C,CoCr,Cr7C3,etc.The appearance of W2C phase represents that the WC phase is decomposed.Nonuniformity of hardness distribution in the laser clad layer is because of the existence of WC hard phases.
Keywords:laser wide-strip cladding  integral mirror  Co-base alloy  microstructure
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