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D36海洋平台用钢Plasma-MIG复合电弧焊接工艺研究

Electric Welding Machine(2014)

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Abstract
D36海洋平台用钢是造船和海洋平台行业不可或缺的材料,本研究采用Plasma-MIG复合电弧焊接实现了厚25 mm的D36钢对接实验.实验表明:采用优化的12道规划路径的Plasma-MIG多层多道焊焊接工艺参数可以满足焊缝宏观形貌要求,焊缝成形美观,无气孔、夹杂、未熔合等缺陷.与传统MIG焊D36钢接头抗拉强度相比,Plasma-MIG复合焊工艺能够提高D36钢的焊接接头强度.Plasma-MIG复合电弧焊接厚25 mm的D36钢焊缝底部的冲击功为62.26J,中部为103.27 J,顶部为124.68 J,均远大于海洋工程平台建造焊接规范标准的34J.因此,焊缝具有较好的低温冲击韧性.
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Key words
hybrid welding process,welding technology,plasma-mig,offshore-platform
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