Method for welding chromium molybdenum vanadium steel

Abstract

The invention discloses a method for welding chromium molybdenum vanadium steel, which adopts a method for welding the chromium molybdenum vanadium steel by using a flux-cored wire. By using the flux-cored wire for welding, the phenomenon that metal elements are difficult to control due to burning losses during welding caused by various reasons can be made up by flexibly adjusting a formula under the condition that a protective gas is used for performing effective protection. Moreover, the flux-cored wire is continuously used, the condition of interrupted operation caused by replacement of welding rods during welding rod welding does not exist, and the flux-cored wire can be particularly applied to mechanized automatic welding and greatly improves the welding efficiency. Because the arc light of the flux-cored wire is soft without spattering sparks, a sealing seam is well formed, and the time for cleaning spattered objects and trimming and grinding the surface of the sealing seam is reduced. According to the method, the flux-cored wire is adopted to weld and repair the chromium molybdenum vanadium steel, and because the flux-cored wire has the characteristics, the repairing efficiency of the chromium molybdenum vanadium steel is improved, and the repairing effect of the chromium molybdenum vanadium steel is greatly improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel repairing and welding, in particular to a welding method for chrome-molybdenum-vanadium steel. Background technique [0002] Welding is a method of overheating or pressure, or both, and may also use filler materials to achieve a combination of workpieces. In the field of iron and steel technology, welding methods are often used to repair damaged steel parts. [0003] In the welding repair method of chromium molybdenum vanadium steel, electrode welding is the main repair method. Although electrode welding can realize the repair of defects in chromium molybdenum vanadium steel, electrode welding has the following technical defects: 1. The efficiency of electrode construction is low , more than 1.5kg per hour; 2. The welding rod spatter is large, the arc light is strong and the welder training period is long, and the skills are difficult to master; 3. Each electrode will waste 50mm and cannot ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a welding method for chrome-molybdenum-vanadium steel, which can be used to repair chrome-molybdenum-vanadium steel by welding, which can solve the problem of low work efficiency and unsatisfactory repair effect caused by welding with electrodes purpose of the question

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