An electromagnetic quantitative stirring device for butt welding of dissimilar plates

Abstract

The invention discloses an electromagnetic quantitative stirring device for butt welding of dissimilar plates, which comprises an electromagnetic stirring device arranged on the Y-shaped grooves of plates A and B on the weld tooling and a magnetic navigation device to drive the electromagnetic stirring device to the direction of the molten pool A moving tractor trolley, the electromagnetic stirring device includes a walking trolley, an electromagnetic device arranged inside the traveling trolley, and a lifting device that adjusts the gap between the electromagnetic device and the molten pool and then controls the stirring intensity. The device of the present invention uses electromagnetic stirring to weld Quantitative stirring is carried out in the area near the fusion line to promote the diffusion of molten metal in the weld to the fusion interface of the base metal, and at the same time increase the nucleation rate during the solidification process of the weld, effectively improve the butt welding strength of dissimilar plates, and obtain dissimilar metal welding with excellent joint performance pieces.

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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