Welding protection method for improving welding quality

Abstract

The invention belongs to the field of welding and particularly relates to a welding protection method for improving welding quality. When high-temperature alloy, titanium alloy, stainless steel and other materials are welded through argon arc welding, the front surfaces of welded seams are usually protected through a welding gun jetting inert gas, and the situation that the quality of the welded seams is reduced by oxygen and harmful gas is avoided; and generally, no universal welded seam protection method exists for the back surfaces of the welded seams. According to the welding protection method for improving the welding quality, metal foil belts are attached to the back surfaces of the welded seams, so that the welding quality is improved in a cheap and easy mode.

Description

technical field [0001] The invention belongs to the field of welding, and in particular relates to a welding protection method for improving welding quality. Background technique [0002] When argon arc welding is used to weld high-temperature alloys, titanium alloys, stainless steel and other materials, a welding torch spraying inert gas is usually used to protect the front of the weld to prevent harmful gases such as oxygen from reducing the quality of the weld, but there is generally no universal weld for the back of the weld protection method. If there are protection requirements for the back of the weld, there are two ways to meet the protection requirements: one is to place the parts in a vacuum argon-filled box for welding, and create an oxygen-free environment for welding. The advantages of this protection method are The welding seam protection effect is good, but the disadvantage is that the cost of the vacuum argon filling box is high. The cost of a single vacuum ...

AI Technical Summary

Problems solved by technology

If there are protection requirements for the back of the weld, there are two ways to meet the protection requirements: one is to place the parts in a vacuum argon-filled box for welding, and create an oxygen-free environment for welding. The advantages of this protection method are The welding seam protection effect is good, but the disadvantage is that the cost of the vacuum argon filling box is high. The cost of a single vacuum argon filling box varies from hundreds of thousands to millions of yuan depending on the size. It costs hundreds of dollars of argon gas, and the process of vacuuming and argon filling needs to be repeated every time the box is unpacked

The second is to manufacture a special protection device. During the welding process, the back of the weld is continuously sprayed with inert gas or the closed parts are filled with inert gas to protect the back of the weld. The advantage is that the cost of the protection device is relatively low. Each set It costs thousands to tens of thousands of yuan. The disadvantage is that the inert gas is affected by the flow of the surrounding gas, the weld cannot be continuously and stably protected, and the protection device is generally not universal.

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