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利用碳弧堆焊将主要由微/纳米WC粉末组成的合金粉块熔敷在普通碳钢上,在对该粉块进行工艺性试验的基础上,采用OM、SEM、EDS、XRD等测试方法对涂层进行了分析。结果表明:和微米级粉末相比,该粉块焊接工艺性良好,熔敷效率高;堆焊层中WC已经发生转变,堆焊层组织主要为富W碳化物(Fe3W3C)、板状马氏体、共晶化合物和残余奥氏体;焊后堆焊层硬度在63HRC以上,最高可达65HRC,表面硬度分布均匀。
The carbon powder surfacing welding mainly composed of micro / nano WC powder alloy powder deposited on the ordinary carbon steel, the powder on the basis of the technical test, using OM, SEM, EDS, XRD and other test methods The coating was analyzed. The results show that, compared with the micron powder, the powder has good welding process and high deposition efficiency. The WC in the surfacing layer has been transformed. The surfacing layer mainly consists of W-rich carbide (Fe3W3C) Body, eutectic compounds and residual austenite; surfacing layer after welding hardness of more than 63HRC, up to 65HRC, surface hardness distribution.