Dissimilar plate butt welding electromagnetic quantitative stirring device

Abstract

The invention discloses a dissimilar plate butt welding electromagnetic quantitative stirring device. The dissimilar plate butt welding electromagnetic quantitative stirring device comprises electromagnetic stirring devices arranged on Y-shaped grooves of a plate A and a plate B on a welding seam tool and a traction trolley driving the electromagnetic stirring devices to move towards a molten poolthrough a magnetic navigation device, and the electromagnetic stirring devices comprise travelling trolleys, electromagnetic devices arranged inside the travelling trolleys, and lifting devices for adjusting gaps between the electromagnetic devices and the molten pool so as to control the stirring strength. According to the dissimilar plate butt welding electromagnetic quantitative stirring device, quantitative stirring is carried out on the area near a weld-fusion line through electromagnetic stirring, so that diffusion of weld joint molten metal towards the fusion interface of the base material is facilitated, meanwhile, the nucleation rate in the weld joint solidification process is increased, the butt welding strength of dissimilar plates is effectively improved, and a dissimilar metal welding part with excellent joint performance is obtained.

Description

technical field [0001] The invention relates to the field of welding, in particular to an electromagnetic quantitative stirring device for butt welding of dissimilar plates. Background technique [0002] With the development of modern industry, the requirements for structures and materials are getting higher and higher, and it is difficult to meet the requirements by using a single material. In this case, it is often more reasonable to apply dissimilar metal welding structures. [0003] Welding of dissimilar metal materials refers to the connection of two or more different metals welded under certain welding process conditions. From the point of view of the joint form, the welding of dissimilar metal materials includes three types, that is, the welding of two different metal base materials, the welding of the same base metal but different weld metals, and the welding of composite metal plates. In addition to differences in alloy composition, dissimilar metal materials also ...

AI Technical Summary

Problems solved by technology

When dissimilar metal materials are welded, due to the great difference in physical properties of dissimilar metal materials, it is difficult for the weld and the base metal to meet the requirements of equal strength, and the mechanical properties of the joint fusion zone and heat-affected zone are poor, especially the plasticity and toughness. , due to the decline in plasticity and toughness, the existence of welding stress and the existence of intermetallic compounds, cracks are prone to occur in the joint, especially in the heat-affected zone, and even fracture is more likely to occur; secondly, the weld metal is easily oxidized during the welding process, The oxides at the grain interface of dissimilar metals will reduce the bonding force of the grains, seriously hinder the combination of the two metals, reduce the mechanical properties of the joint, and bring adverse consequences to the quality of the weldment

[0005] In short, the existing welding methods are difficult to meet the needs of welding quality requirements between dissimilar metal materials, especially dissimilar metal plates

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