比较研究了堆焊层在焊态和回火态的组织、硬度、耐磨性及抗热疲劳性能。
The microstructure, hardness, wear resistance and thermal fatigue resistance of submerged -arc welded surfacing lay er in weld state and heat treatment state have been comparatively investigated.
与不含焊接缺陷的焊态试件相比，提高疲劳强度32%，提高疲劳寿命2～7倍；
Compared with as-welded specimens with no defects, the fatigue strength has been increased by 32%, and the fatigue life by 2~7 times.
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.
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