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本文分析了钛型渣系气保护药芯焊丝的电弧行为和化学冶金过程,探讨了药芯焊丝的焊接飞溅及焊缝中气孔工艺质量问题。结果表明,药芯焊丝熔滴过渡的基本形态是非轴向排斥过渡,焊丝的电弧形态属于活动、连续型,焊丝熔滴过渡受主导力控制。焊丝的焊接化学冶金过程是分区连续进行的。药芯焊丝熔滴过渡中伴随渣柱,以及渣柱直接进入熔池现象,可能导致焊接化学冶金反应不完全和冶金过程的新变化。药芯焊丝的焊接飞溅主要发生在非轴向排斥过渡的熔滴与焊丝之间的缩颈处,提出通过熔滴过渡指数控制焊接飞溅新观点。当气体从焊缝金属中逸出被阻止于焊缝中或被困于熔渣下面,就分别形成了气孔和表面压坑,提出了通过电弧中熔滴吸收氢的总重量控制焊缝中气孔的新思路。
In this paper, the arc behavior and chemical metallurgical process of titanium slag-based gas-shielded flux-cored wire are analyzed. The welding spatter of the flux-cored wire and the quality of the stomatal process in the weld are discussed. The results show that the basic form of flux droplet transfer is non-axial repulsion transition, the arc shape of the welding wire belongs to the activity, continuous type and the droplet transfer of the welding wire is controlled by the dominant force. Welding wire welding metallurgical process is continuous zoning. The flux-drop transition with the slag column and the slag column directly into the molten pool may lead to incomplete chemical and metallurgical reactions in welding and new changes in the metallurgical process. The welding spatter of the flux cored wire mainly occurs at the necking point between the droplet and the welding wire which is not in the axial exclusion transition, and a new viewpoint is proposed to control the spatter of welding by the droplet transition index. When the gas escaping from the weld metal is blocked in the weld or trapped below the slag, pores and surface pressure pits are formed, respectively. It is proposed that the total weight of the hydrogen absorbed by the droplet in the arc be used to control the porosity of the weld New ideas.