宽带激光熔覆制造高速线材硬质合金辊环  

The fabrication of high-speed wire rolls by wide-strip laser cladding cemented carbide

作　　者：杨胶溪[1] 左铁钏[1] 徐文清[2] 高协清 闫婷[1] 

机构地区：[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,无锡214026

出　　处：《应用激光》2006年第6期369-371,374,共4页Applied Laser

基　　金：国家科技计划"973"项目(编号:2006CB605206)资助

摘　　要：利用积分镜对激光束进行整形获得宽带激光束,在Crl2基体上进行了宽带激光熔覆WC/钴基合金层,获得无裂纹的高速线材辊环。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进行合金物相的表征。结果表明,熔覆层组织主要是由Co的过饱和固溶体、WC、W_2C、CoCr、Cr_7C_3等相组成。W_2C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。The round laser beam pattern was shaped into wide - stripe by integral mirror. The WC/Co - base alloy was fabricated on Cr12 roll matrix by the wide - strip laser cladding method without cracks. The morphology of laser cladding layer was observed by SEM,composition analysis was applied by EDS, and the phase transformation was characterized by XRD. The results showed that the main structure of laser cladding WC/Co -base alloy was Co supersaturated solid solution and the phases of WC,W2C,CoCr,Cr7C3 etc. The appearance of phase W2C illustrated that the phase WC decomposed. Inhomogeneity of hardness existed in the laser dedding layer because of WC hard phases.

关 键 词：激光宽带熔覆 积分镜 硬质合金 辊环 

分 类 号：TG333.62[金属学及工艺—金属压力加工]