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对WB36钢多层焊接过程中接头部分热影响区的组织特点进行了分析。研究发现,接头热影响区的某些位置会产生一种网状组织沿熔合线方向平行分布,其大小范围为0.6 mm×1.1 mm。采用热模拟方法,根据实际焊接情况再现了接头中的网状组织。网状组织在HAZ的重叠区出现,受到两次热循环会形成网状组织,第一次是在粗晶区域的热循环,第二次是在峰值温度AC1~AC3之间的不完全再结晶区域内的热循环;或者受三次热循环也可能形成,第一次、第二次是在粗晶区热循环作用,第三次是在峰值温度为AC1~AC3之间的不完全再结晶区域内的热循环。
The microstructural characteristics of the heat affected zone of the joint in WB36 multi-layer welding process were analyzed. The study found that some locations in the heat-affected zone of the joint produce a parallel distribution of reticular tissue along the fusion line, with a size range of 0.6 mm × 1.1 mm. Using thermal simulation method, according to the actual situation of the welding reappearance of mesh in the joint organization. The reticular tissue appears in the overlapping region of HAZ, reticulated tissue formed by two thermal cycles, the first is the thermal cycling in the coarse-grained region and the second is the incomplete recrystallization at peak temperatures AC1 ~ AC3 Or within three thermal cycles, the first and second thermal cycles in the coarse grain zone and the third in the incomplete recrystallization zone with peak temperatures between AC1 and AC3 Within the heat cycle.