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Welding method and welding device with weld joint water-cooled synchronously and from right side

A welding method and water cooling technology, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems affecting welding temperature and welding quality, and achieve accurate cooling, improve mechanical properties, and improve the effect of cooling effect.

Inactive Publication Date: 2013-06-19
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is generally applied to pipe welding, and water-cooled welding is carried out by passing cooling water through the pipe. It can also be realized for flat plate welding, but there needs to be enough space on the back of the weld so that another person can impact the back of the weld with cooling water to achieve water-cooled welding. Therefore, the application of this method is affected by the shape of the weldment and the conditions of the welding site. It is difficult to use this water-cooled welding method for non-pipe weldments and the back of the weld is not easy to reach; Water cooling is carried out at the same time as welding, which directly affects the welding temperature, so it has a certain impact on the quality of welding

Method used

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  • Welding method and welding device with weld joint water-cooled synchronously and from right side
  • Welding method and welding device with weld joint water-cooled synchronously and from right side
  • Welding method and welding device with weld joint water-cooled synchronously and from right side

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A welding method for frontal synchronous water-cooled welds. In the self-fluxing tungsten argon arc welding of single-phase stainless steel plates with a plate thickness of 0.5~2mm, both the front and back of the single-phase stainless steel plates use inert gas as the shielding gas. The welding speed 450mm / min~550mm / min, use cooling water to cool the front of the solidified weld area at a distance of 10~30mm from the welding torch that the welding torch has passed. If the distance is too small, the cooling water can easily enter the welding pool and cause welding defects. If the distance is too large, the water cooling effect will be greatly weakened.

[0022] The single-phase stainless steel is austenitic stainless steel or ferritic stainless steel.

[0023] If the cooling water flow rate is too large, it will easily flow into the molten pool, and if it is too small, the water cooling effect will not be achieved. The cooling water flow rate is 30-120ml / min.

[0024] ...

Embodiment 2

[0032] The difference between embodiment 2 and embodiment 1 is that the conventional air-cooled welding and the welding method of the front synchronous water-cooled weld of the present invention are used to carry out self-fluxing tungsten argon arc welding on the 430 ferritic stainless steel sheet with a thickness of 0.6 mm, and the welding shielding gas and the back The shielding gas is pure Ar, the gas flow rate is 10L / min and 6L / min respectively, the welding current is 30A, the welding voltage is 8.2V, and the welding speed is 500mm / min.

[0033] The cupping test was carried out on the welding seam of the welding plate: both cuppings were cracked at the weld position, the cupping value of conventional air-cooled welding was 7mm, and the cupping value of water-cooled welding was 7.8mm. The results showed that water-cooled welding improved the ferritic stainless steel. Sheet cupping value.

Embodiment 3

[0035] The difference between embodiment 3 and embodiment 1 is that the welding method of conventional air-cooled welding and the front synchronous water-cooled weld of the present invention is used to carry out self-fluxing tungsten argon arc welding of 304L austenitic stainless steel sheet with a thickness of 1mm, welding shielding gas and back shielding The gas is pure Ar, the gas flow rate is 10L / min and 6L / min respectively, the welding current is 80A, the welding voltage is 9.6V, and the welding speed is 500mm / min.

[0036] The cupping test was carried out on the welded seam of the welded plate: both cuppings were cracked at the weld position, the cupping value of conventional air-cooled welding was 13mm, and the cupping value of water-cooled welding was 13.5mm. The results showed that water-cooled welding improved the austenite sheet cupping value.

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Abstract

The invention relates to the welding field, in particular to a synchronous water-cooling welding method and a welding device. According to the welding method with a weld joint water-cooled synchronously and from the right side, during self-fluxing argon tungsten-arc welding of a one-phase stainless steel sheet, inert gases are adopted as protective gases for both the front side and the back side of the one-phase stainless steel sheet, and a solidified weld joint area a welding gun passed by and a certain distance away from the welding gun is cooled from the right side with cooling water. The welding device with the weld joint water-cooled synchronously and from the right side is composed of the welding gun and a water-cooling hairbrush, wherein the water-cooling hairbrush comprises a hairbrush body, a brushing baffle, a current slow-releasing layer and heat-resisting bristles. According to the welding method and the welding device with the weld joint water-cooled synchronously and from the right side, a welding area can be cooled conveniently, accurately and in time, the cooling effect of the welding area is greatly improved, the mechanical property of the weld joint is improved, water-cooling welding can be carried out conveniently even under complicated welding conditions, and restriction of shape and position of a welded piece is eliminated. The welding method and the welding device with the weld joint water-cooled synchronously and from the right side are applicable to various welding situations conveniently.

Description

technical field [0001] The invention relates to the welding field, in particular to a synchronous water-cooled welding method and device. Background technique [0002] For fusion welding, it refers to heating by a heat source (mainly electric arc, flame, laser, etc.) to melt the local base material and filler material of the workpiece to be welded (in the case of adding filler material), and form a molten pool, which is then cooled and crystallized. The process of forming a weld. Due to the action of the welding heat source, it is easy to overheat the weld metal and the welding heat-affected zone, which often leads to coarse grains of the weld metal and the heat-affected zone, resulting in defects and poor performance. In addition, in order to prevent and eliminate the adverse effects of welding heat on welding, some high-alloy metals such as stainless steel need to control the temperature between layers. For thick plates, it takes a long time to wait for the welding plate ...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/025B23K9/32
Inventor 朱双春王宝森许轲
Owner BAOSHAN IRON & STEEL CO LTD