Due to the large size of the deaerator water tank of a nuclear power station, in-situ welding is required for 2 ring butt welds, causing difficulties in welding and heat treatment.
某核电站除氧器水箱尺寸较大，其2条环焊缝需在现场拼焊，焊接和热处理难度很大。
The mechanical testing results showed that tensile strengths of samples welded by direct welding is only 31.24% of that of the parent metal, and 50.89% of that by "in-situ" welding.
力学性能试验结果表明，不加填充材料焊接时，试样拉伸强度仅为母材强度的31.24%；进行原位焊接时，试样强度达到母材强度的50.89%。
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