Stable welding method for argon arc welding of high-silicon-content silicon steel

Abstract

The invention relates to a stable welding method for the argon arc welding of high-silicon-content silicon steel which containing more than 2%of Si, which comprises the following steps: carrying out structural design on a welding inverse electrode for supporting the formation of weld seams, designing an electrode groove in the length direction on the upper surface of the welding inverse electrode, and designing the cross section of the electrode groove into a circular arc, wherein the width of the electrode groove is 4-10mm, the radius of the circular arc is 5.5-15.5mm, and the depth of the arc-shaped electrode groove is 0.6-3.6mm; and welding, and arranging a steel plate to be welded on the welding inverse electrode, wherein the welding seam clearance is 0.4-2.0mm, the welding speed is 1500-2900mm / min, the wire feed speed is 10-35m / min, and the fusion start set value and the fusion stop set value are respectively set to 0.1-1.5s and 0.2-2.0s. The stable welding method for the argon arc welding greatly improves the quality of lower surfaces of welding seams, the infused energy can be diffused more quickly, the abnormal growth of crystal grains can not be found in the thermal reaction region, and the mechanical property of the welding seams is greatly enhanced.

Description

technical field [0001] The invention relates to a welding technology, in particular to a stable argon arc welding method for silicon steel with a high Si content greater than 2%. Background technique [0002] The welding machine used by the normalization unit is a shielding gas argon arc welding machine. When using the original welding technology, that is, the ordinary reverse electrode plus the original welding process to weld electrical steel with high silicon content, due to poor welding quality, the belt It is very easy to break the belt at the welding seam when the steel is over-tensioned during operation or when it enters the continuous annealing furnace. It takes a long time to deal with the broken belt every time, and it takes a lot of manpower and material resources, which seriously affects the normal stability and smoothness of the unit. OK, low production efficiency. [0003] The higher the silicon content, the worse the toughness of the deposition zone near the ...

AI Technical Summary

Problems solved by technology

[0005] When using shielding gas argon arc welding machine to weld electrical steel with high silicon content under the original welding process, the welding quality is very poor, and it is very easy to break the weld at the weld, which seriously affects the normal stability of the unit and the production efficiency is low.

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