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TIG welding method for improving the welding penetration depth and preventing the back oxidation

A back and penetration technology, used in welding equipment, welding media, welding equipment, etc., can solve the problems of low welding efficiency, back oxidation, insufficient penetration, etc., to improve welding efficiency, prevent back oxidation, and form good back. Effect

Active Publication Date: 2019-04-12
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a TIG welding method that improves welding penetration and prevents back oxidation, and solves insufficient penetration, incomplete penetration, low welding efficiency and back oxidation in the TIG welding process. , porosity, inclusions, weld bumps and other issues

Method used

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  • TIG welding method for improving the welding penetration depth and preventing the back oxidation
  • TIG welding method for improving the welding penetration depth and preventing the back oxidation
  • TIG welding method for improving the welding penetration depth and preventing the back oxidation

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Effect test

Embodiment 1

[0030] Weigh the powder as follows: SiO2 22%, CaF2 5%, TiO2 28%, MnO2 5%, Mn 22%, Si18%. After mixing the powder evenly, mix it with the binder in a ratio of 1:4 to 6 to form a protective agent, and then dilute the protective agent with acetone in a ratio of 1.5 to 3:1. The thickness of the front coating is 0.1mm and the thickness of the back coating is 0.1mm. 2mm, put it in the air for 5-10 minutes, and then apply welding.

Embodiment 2

[0032] Weigh the powder according to the following mass percentages: SiO2 22%, CaF2 5%, TiO2 25%, MnO2 4%, Mn 26%, Si18%. After mixing the powder evenly, mix it with the binder in a ratio of 1:4 to 6 to form a protective agent, and then dilute the protective agent with acetone in a ratio of 1.5 to 3:1. The thickness of the front coating is 0.1mm and the thickness of the back coating is 0.1mm. 2mm, put it in the air for 5-10 minutes, and then apply welding.

Embodiment 3

[0034] Weigh the powder according to the following mass percentages: SiO2 22%, CaF2 5%, TiO2 25%, MnO2 4%, Mn 24%, Si20%. After mixing the powder evenly, mix it with the binder in a ratio of 1:4 to 6 to form a protective agent, and then dilute the protective agent with acetone in a ratio of 1.5 to 3:1. The thickness of the front coating is 0.1mm and the thickness of the back coating is 0.1mm. 2mm, put it in the air for 5-10 minutes, and then apply welding.

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Abstract

The invention discloses a TIG welding method for improving the welding penetration depth and preventing the back oxidation. The TIG welding method for improving the welding penetration depth and preventing the back oxidation comprises the following steps that firstly, the powder is mixed with a binder according to the mass ratio of 1:4-6, the protective agent is formed, then the protective agent is diluted with acetone at a ratio of 1:5-3:1, the powder comprises the following components of, in percentage by mass, 20%-32% of SiO2, 4%-10% of CaF2, 25-35% of TiO2, 5%-12% of MnO2, 15%-30% of Mn and 16%-25% of Si; secondly, then the protective agent is brushed on the front surface and the back surface of the welding opening, the coating thickness of the front surface is 0.1mm, the thickness ofthe back surface is 2 mm, standing is carried out for 5-10 minutes in air, and then welding is carried out. According to the TIG welding method for improving the welding penetration depth and preventing the back oxidation, the penetration depth of the TIG welding can be greatly improved, the back oxidation of the weld joint can be prevented, forming defects such as weld joint slag inclusion, gas holes, welding penetration and the like are overcome, and one-time welding forming of the stainless steel in the thickness of 5-10 mm is achieved; according to the TIG welding method, a complex multi-layer welder is omitted, the production period is shortened, the energy consumption is reduced, the cost is saved, and the forming quality of the TIG one-time welding is greatly improved.

Description

Technical field [0001] The invention belongs to the technical field of metal welding, and relates to a welding method suitable for stainless steel and other high-alloy steels, and in particular to a TIG welding method for improving welding penetration and preventing back oxidation. Background technique [0002] TIG welding joints are of excellent quality and are suitable for welding almost all metals and alloys such as stainless steel, high temperature alloys, titanium alloys, etc. However, it also has some disadvantages. When the pipe is welded on one side and on both sides, insufficient penetration and low welding efficiency become prominent problems. In addition, small diameter pipe welding and other application scenarios where single-sided welding must be used for double-sided forming, the problem of high temperature oxidation on the back of the welding joint is very prominent, which will seriously affect the mechanical properties and corrosion resistance of the joint, and ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36B23K9/167
CPCB23K9/167B23K35/3607
Inventor 强伟邢晓芳周勇杨永春李霄路永新
Owner XI'AN PETROLEUM UNIVERSITY
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