The fracture rod has cracks in the microstructure of weld zone, intergranular cracks exists in the coarse grain zone of the weld heat affected zone.
进一步比较了断裂拉杆和已经产生裂纹的拉杆焊缝区的显微组织，发现在焊缝的热影响区粗晶区存在沿晶裂纹。
It points out that reasonable drug composition of welding rod can improve the low temperature properties of low carbon steel weld.
指出合理的焊条药皮组分可明显提高低碳钢焊缝的低温性能。
Is familiar with all weld process equipment for example welding rod, welding torch and electric welding equipment.
熟悉所有的焊接工艺设备，如焊条，焊钳和电焊机等。
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