高速电弧焊中驼峰焊道的形成机理及影响因素探讨  

Discussion on Mechanism and Influential Factors of Humping Weld in High-Speed Arc Welding

作　　者：王付鑫[1] 于治水[1] 石昆[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《上海工程技术大学学报》2008年第3期248-253,共6页Journal of Shanghai University of Engineering Science

摘　　要：高速焊由于可以大幅度提高生产效率,已成为焊接界的研究热点。但焊接速度提高的同时也更容易产生焊接缺陷,如驼峰焊道,即焊缝金属沿焊接方向上分布严重不均的焊缝成形缺陷。驼峰焊道的出现限制了焊接速度的进一步提高,国内外焊接学者已对驼峰焊道进行了深入的研究,目前提出了多种模型来解释驼峰焊道的形成机理,但尚未形成统一认可的理论。为此介绍驼峰焊道的形貌,并以高速电弧焊中驼峰焊道为例,结合国内外研究现状对高速电弧焊中驼峰焊道形成机理进行分析,认为保护气、金属成分、电极几何形状和热源形态等都是影响驼峰焊道的因素。High-speed welding becomes a hot topic of welding field because it can improve the productivity obviously. A commonly observed welding defect characteristically occurs at high-speed welding, such as humping weld. Humping is the periodic occurrence of beadlike protuberances. The occurrence of humping weld prevents further increase in productivity in a welding operation. At present, various phenomenological models of humping weld have been proposed to interpret the physical mechanisms. But there was not a uniform or well- accepted model to demonstrate this physical mechanism satisfactorily. In this paper, the welding morphology was stated and the occurrence mechanism and influential factors of humping weld which occurs in high-speed arc welding were analyzed. It is considered that the protective atmosphere, metal composition, geometric shape of electrode and the form of heat source are the factors affecting the humping welds.

关 键 词：驼峰焊道 形成机理 焊接 

分 类 号：TG442[金属学及工艺—焊接]