摘要:
某高强钢具有强度高、碳当量高、焊接冷裂倾向大等特点。作者通过对比分析手工电弧焊、气体保护焊、双面双弧焊等焊接工艺,对焊接效率、焊接力学性能、焊接工艺性等进行了分析。分析发现:气体保护焊效率为手工焊效率2倍以上,双面双弧焊接效率最高;焊接线能量增加,强度下降,韧性增加;为保证层/道间温度,在立焊位置,手工焊条电弧焊焊道长度不宜大于1.2 m,气体保护焊焊道长度不宜大于0.9 m;在横焊位置,手工焊条电弧焊焊道长度不宜大于1.9 m,气体保护焊焊道长度不宜大于2.8 m。
Abstract:
The high strength steel has high strength, carbon equivalent and tendency to welding cold cracking. It is significant to ensure the welding quality and improve the welding efficiency. In this study, the welding efficiencies, welding mechanical performances, welding technologies of the manual arc welding, gas shielded welding, and double side arc welding are compared and analyzed. It is found that the efficiency of gas metal arc welding is more than 2 times of that of the manual electrode arc welding and that the efficiency of double-side welding is the highest. With the increase of the welding input increases, the strength decreases and the toughness increases. To ensure the temperature between layers/passes, at the vertical positions, the length of the welding pass for manual electrode arc welding should not be greater than 1.2 m, and that for the gas metal arc welding no greater than 0.9 m. At the horizontal positions, the length of the welding pass for the manual electrode arc welding should not be greater than 1.9 m, and that for the gas metal arc welding no greater than 2.8 m.
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