With SMAW method, the surfaces of A3 and 45 steel were welded by using the series of CHR electrode, and the microstructure and performance of surfacing welding layer metal were analyzed.
借助手工电弧焊方法，使用CHR系列堆焊焊条对A 3、45钢进行堆焊加工，分析了其堆焊层金属的显微组织及性能。
After heat treatment, the residual austenite is decreasing and carbides are increasing. The hardness of the surfacing layer is higher than that as welded.
经过热处理后，堆焊层中残余奥氏体的量明显减少，碳化物进一步析出，使得堆焊层的硬度比焊态下有了较大的提高。
After heat treatment, the residual austenite is decreasing and carbides are increasing. The hardness of the surfacing layer is higher than that as welded.
经过热处理后，堆焊层中残余奥氏体的量明显减少，碳化物进一步析出，使得堆焊层的硬度比焊态下有了较大的提高。
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