Study on Contact-welding Process for X70 Heavy-wall HFW Pipe
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摘要: 研究X70钢级Φ508 mm×17.5 mm规格高频焊管接触焊工艺，并检测高频接触焊钢管焊缝的性能，分析高频接触焊接工艺电极触脚在管体产生的划痕。试验结果表明，采用高频接触焊接工艺进行焊接，HFW钢管焊缝的各项性能指标均达到GB/T 9711—2017标准PSL2等级要求，说明采用高频接触焊接工艺可以制造性能良好的HFW钢管；电极触脚在管体表面产生的划痕并不影响钢管性能；高频接触焊接工艺的电能损耗是同等条件下高频感应焊接工艺的55%。Abstract: Studied in the article is the contact-welding process for the Φ508 mm×17.5 mm HFW pipe.The performance of the weld of the said HFW pipe is tested.And the scratch mark on the pipe surface as caused by the HFW electrode tips is investigated.The testing result indicates that thanks to the HF contact welding, all the performance indexes of the weld of the said pipe are in compliance with relevant requirements as specified in GB/T 9711—2017 PSL2, which means that it is practical to adopt the said HF contact-welding process to produce excellent HFW pipes.The scratch marks as made by the electrode tips on the pipe surface will not produce any negative influence on the pipe performance.Moreover given relevant conditions are the same, the power consumption by the HF contact-welding process is just 55%of that by the HF induction welding process.
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Keywords:
- weld steel pipe /
- HFW /
- contact type /
- weld performance
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