Welding technology for barrel

Abstract

The invention discloses a welding technology for a barrel. The welding technology comprises the following steps: an inner groove machining step, wherein an inner groove is formed through machining and assembling, and the inner groove is an inverted-V-shaped groove; an inner groove welding step, wherein the inner groove is welded, and double-power three-wire submerged arc welding is adopted for welding of the inner groove; an outer groove machining and inner groove back chipping step, wherein the outer groove machining and the inner groove back chipping are performed through one step, and the outer groove is a U-shaped groove; and an outer groove welding step, wherein the outer groove is welded, and double-power three-wire submerged arc welding is adopted for welding of the outer groove. According to the welding technology for the barrel disclosed by the invention, the problems in the prior art that the welding efficiency of the low-alloy high-strength steel thick plate of the barrel is low; manual carbon arc air gouging backing chipping needs to be performed at root parts; the metal filling amount is large at the weld joint; and the like are solved. The welding efficiency and the production efficiency of the welding technology is improved by 2-3 times compared with a traditional technology; the welding material is saved by 10%-20%; carbon arc air gouging backing chipping is not needed; and manual work is reduced by 50%.

Description

technical field [0001] The invention relates to a welding process, more specifically, to a welding process for high-strength steel thick plates. Background technique [0002] A large number of low-alloy high-strength steels are used in marine engineering equipment, and the steel parts formed by these steels need to be welded. For low-alloy high-strength steels, especially those with thicker plates, welding is more difficult. [0003] Offshore wind power system is an important product in offshore equipment. Wind power pipe piles are an important part of wind power systems. The barrel material of offshore wind power pipe piles is generally S355 grade low-alloy high-strength steel with a plate thickness of 40-100 mm. The welded joints generally require high low-temperature impact toughness and CTOD value. In traditional production, manual arc welding is used for bottom welding of cylinder ring longitudinal seam, single-wire submerged arc welding is used to fill cover surface...

AI Technical Summary

Problems solved by technology

It is labor-intensive and time-consuming, and the labor intensity of the workers is high, the production environment is harsh, and the welding quality is difficult to guarantee

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