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异种钢材焊接后,由于焊缝中气孔、夹渣等缺陷的存在,使其组织复杂化,大大降低了该类焊接件的承载能力。本文以异种钢材Q235-0Cr17Ni9板状焊接结构件为例,对试件采取了不同种类及不同程度的锻造变形,从宏观、微观角度观察了热塑性变形对焊缝组织的影响,分析结果表明不同的锻造方法均能在不破坏焊缝金属-母相原有结合状态的基础上,焊合焊缝组织中的气孔类等缺陷,使焊缝金属变为更理想的层状组织,从而大大提高了其服役周期,对此类工件的生产制造具有一定的指导意义。
After dissimilar steel welding, due to the presence of defects such as porosity and slag in the weld, the structure is complicated and the carrying capacity of such welding parts is greatly reduced. In this paper, the dissimilar steel Q235-0Cr17Ni9 plate welded structure as an example, the specimen took different types and different degrees of forging deformation, macroscopic and microscopic view of the thermoplastic deformation of the weld microstructure, the results show that different Forging method can not damage the joint state of the weld metal - the original mother of the weld on the basis of weld porosity and other defects, the weld metal into a more ideal layered structure, which greatly enhanced its Service cycle, the production of such artifacts have a certain significance.