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.
纵向角接接头超声冲击处理试件与原始焊态试件相比，疲劳强度提高1 73 %左右，疲劳寿命延长了3 2～ 70倍。
The fatigue strength of the longitudinal fillet welded joint specimen treated by ultrasonic peening increases by about 173% and the fatigue lifetime prolonges by 32~70 times.
时效态合金在焊核区晶内析出的第二相明显要多于固溶态。
The amount of intragranular precipitates in the age treated alloy were more than that of the solution treated alloy.
时效态合金在焊核区晶内析出的第二相明显要多于固溶态。
The amount of intragranular precipitates in the age treated alloy were more than that of the solution treated alloy.
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