Solid welding wire gas shield welding method for nickel-based plate type splicing

Abstract

The invention relates to the field of gas shield welding, in particular to a solid welding wire gas shield welding method for nickel-based plate type splicing. A single groove or double grooves is/are formed in a butt joint weld joint, when complete through welding is required, the height of the truncated edge of the groove is less than or equal to 2 mm; the misalignment amount of the groove is controlled through a welding misalignment control tool to be within the following ranges that the misalignment amount of the single groove is less than or equal to 0.8 mm, and the misalignment amount of the double grooves is less than or equal to 2 mm; the butt joint weld joint is subjected to point welding, and the welding misalignment control tool is disassembled; and the two sides of the groove are both welded through nickel-based solid welding wire gas shield welding, after one side is welded, the other side is welded, the square groove side is firstly welded when the single groove is adopted, and the clad metal thickness of a single layer weld pass is less than or equal to 4 mm during welding. The solid welding wire gas shield welding of nickel-based materials is achieved through the solid welding wire gas shield welding method; a mixed gas of Ar+CO2 can serve as a protective gas, and the welding cost is reduced; the solid welding wire gas shield welding method can be used for all nickel-based plate type butt joint weld joints, especially nickel-based weld joints with high restraint stress.

Description

technical field [0001] The invention relates to a gas shielded welding method, in particular to a welding method for splicing nickel-based substrates. Background technique [0002] In the gasification furnace, some parts are spliced ​​by nickel-based finned tubes. For the fin splicing of nickel-based finned tubes, there is a large restraint stress in the butt weld. The welding method is usually plasma welding, electrode arc welding or powder Core welding wire gas shielded welding. Among them, plasma welding equipment is expensive and requires a large one-time investment, and most manufacturers do not have such equipment; electrode arc welding is manual welding, which not only has poor welding quality and low efficiency, but also requires post-weld slag removal; flux-cored wire gas shielded welding Finally, manual slag removal is required, and automatic welding cannot be realized, and nickel-based flux-cored welding wire can only be imported, and the cost of welding wire is ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the high cost of existing fin splicing and welding, the technical problem to be solved by

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