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Automatic active argon tungsten-arc welding method

A welding method and argon tungsten arc technology, which are applied in welding equipment, welding accessories, arc welding equipment, etc., can solve problems such as poor welding effect, achieve improved mechanical properties, avoid stability, avoid pollution and burning damage Effect

Inactive Publication Date: 2018-01-12
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of poor welding effect in the current active argon tungsten arc welding process and further improve the welding efficiency and welding quality of the current active argon tungsten arc welding, the present invention proposes a new automatic active argon tungsten arc welding arc welding method

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  • Automatic active argon tungsten-arc welding method

Examples

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Effect test

Embodiment 1

[0055] Example 1, the automatic active tungsten argon arc welding method of the present invention is used to carry out direct current positive surface fusion welding on an austenitic stainless steel plate SUS304 with a thickness of 8 mm.

[0056] Among them, the active agent powder is SiO 2 , the particle size is 100 mesh, the motor speed of the powder feeder is 30r / min, that is, the delivery amount of the active agent powder with the outer gas is 0.62g / min. The inner layer gas is argon, and the outer layer gas is argon. The welding process parameters are: welding current 180A, welding speed 80mm / min, arc length 3mm, inner layer gas flow rate 10L / min, outer layer gas flow rate 6L / min.

[0057] Before the welding operation, the appearance of the tungsten electrode is as follows: figure 2 Shown; During the welding process, the shape of the arc is as follows image 3 As shown; after welding is completed, the front side of the weld is obtained as Figure 4 As shown, the cross...

Embodiment 2

[0058] In Example 2, the same method as in Example 1 was used to carry out direct current positive surface fusion welding on an austenitic stainless steel plate SUS304 with a thickness of 8 mm. The only difference is that the welding current is 200A, the gas flow rate of the inner layer is 12L / min, and the gas flow rate of the outer layer is 8L / min.

[0059] After welding is completed, obtain the front side of the weld as Figure 7 As shown, the backside of the weld is obtained as Figure 8 As shown, the cross-section of the obtained weld is as Figure 9 shown.

Embodiment 3

[0060] In Example 3, the same method as in Example 1 was used to carry out direct current positive surface fusion welding on an austenitic stainless steel plate SUS304 with a thickness of 8 mm. The only difference is that the active agent powder is made of TiO 2 .

[0061] After welding is completed, obtain the front side of the weld as Figure 10 As shown, the cross-section of the obtained weld is as Figure 11 shown.

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Abstract

The invention belongs to the technical field of welding and particularly relates to an automatic active argon tungsten-arc welding method. In order to further improve the welding efficiency and welding quality of the current active argon tungsten-arc welding, the invention discloses a novel automatic active argon tungsten-arc welding method. According to the automatic active argon tungsten-arc welding method, a double-layer protective gas welding gun is adopted for carrying out argon tungsten-arc welding, wherein an inner layer gas passage transports inert gas, and an outer layer gas passage transports active agent powder and outer layer gas. With adoption of the automatic active argon tungsten-arc welding method, through changing the elements of the active agent or the variety of the outer layer gas, flow behavior of metal in a furnace hearth can be changed, the fusion depth and depth-to-width ratio of a weld joint are increased in a multiplied manner, the elements and the texture ofthe weld joint are controlled, and the mechanical property of the weld joint is improved to obtain the weld joint with high quality and high fusion depth; and in addition, automatic adding of the active agent can be realized during the welding process, so that automation of the welding operation is realized, and the welding efficiency is improved.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to an automatic active tungsten argon arc welding method. Background technique [0002] In recent years, the active tungsten argon arc welding method has attracted widespread attention worldwide. By introducing active elements during the welding process, the penetration depth can be significantly increased and high-quality welding can be achieved. At present, in the active tungsten argon arc welding process, the introduction of active elements is mainly divided into three categories, the first is through active gas, the second is through coating active agents on the surface of the base metal, and the third is through Active agents are generated in situ by reactive gases. [0003] Among them, the first method is to introduce a single gas or a mixed gas containing active element oxygen into the welding area. In this way, during the welding process, the oxygen-containing gas decompo...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/26B23K9/28B23K9/32
Inventor 黄勇赵文强
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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