不锈钢材料的高效率焊接新工艺

金属学报, 2010, 46(11): 1347-1364. doi: 10.3724/SP.J.1037.2010.00437

不锈钢材料的高效率焊接新工艺

陆善平 ^1, , 董文超 ^2, , 李殿中 ^3, , 李依依 ^4,

1.中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016

2.中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016

3.中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016

4.中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016

基金项目: 国家自然科学基金资助项目(50874101)

关键词：不锈钢 , 高效率焊接 , 活性元素 , 氧 , Marangoni 对流 , 熔池形貌

HIGH EFFICIENCY WELDING PROCESS FOR STAINLESS STEEL MATERIALS

针对不锈钢材料钨极惰性气体保护(TIG)焊熔深浅、焊接效率低的缺点开发了大深宽比高效率TIG焊接新工艺,包括活性剂焊接工艺、混合气体联合保护焊工艺和双层气流保护焊工艺.与涂覆活性荆法相比,混合气体法不仅可获得深熔深,而且操作方便,易于实现工业化;双层气流法可有效避免混合气体法中电极氧化烧损现象.实验和模拟结果表明:熔池中活性元索O含量变化导致的Marangoni对流方向的变化是TIG焊熔深增加的主要因素,焊接过程中调整液态熔池中活性组元含量可获得大深宽比焊缝.高效率TIG焊接工艺对焊接规范(焊接速度、焊接电流和电极间距)不敏感,有利于在工业生产中推广应用.

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不锈钢材料的高效率焊接新工艺

HIGH EFFICIENCY WELDING PROCESS FOR STAINLESS STEEL MATERIALS

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