Stainless steel tube welding method

A technology for stainless steel pipes and welding methods, applied in welding equipment, tubular articles, arc welding equipment, etc., can solve problems such as melting defects, porosity and welding metal embrittlement, and achieve the effect of improving production efficiency and welding seam quality

Inactive Publication Date: 2018-05-11
无锡市迪索数控焊接设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these gases come into contact with the electrode, arc or weld metal, they can cause melting defects, porosity and weld metal embrittlement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] A stainless steel pipe welding method, the specific steps are as follows:

[0016] (1) Clean up oil, rust and other dirt, and grind the groove surface and the surrounding 10mm to give a metallic luster.

[0017] (2) Check whether the water, electricity and air circuits are unblocked, and the equipment and accessories should be in good condition.

[0018] (3) Assemble the stainless steel pipes to be welded. The positioning welding is fixed by the rib plate (2 points, 7 points, and 11 points are fixed by positioning blocks), and it can also be fixed by point fixing in the groove, but the quality of the positioning welding must be paid attention to.

[0019] (4) Set soluble paper on both sides of the weld in the stainless steel pipe for inflatable protection, the weld is sealed by tape, and the argon gas inlet pipe passes through the tape to fill the stainless steel pipe with argon for protection.

[0020] (5) TIG welding is performed, using tungsten electrodes for weldin...

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PUM

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Abstract

The invention discloses a stainless steel tube welding method. According to the method, a stainless steel tube is welded through a welding mode formed by TIG welding in combination with MAG welding, wherein TIG welding is used as backing welding, and MAG welding is used as filling welding and cosmetic welding. According to TIG welding, soluble paper or a combination of the soluble paper and a block board is adopted to block ventilation, and coating welding wires are adopted for backing. Active mixed gas is adopted to protect MAG welding, and all-position filling and cosmetic layer welding areconducted; stability of globular transfer can be improved; cathode spots can be stabilized; and the thermal power of electric arcs can be increased.

Description

technical field [0001] The invention relates to a welding method, in particular to a stainless steel pipe welding method. Background technique [0002] The welding of stainless steel pipes usually consists of root welding, filling welding and cover welding. The bottom welding of stainless steel pipe is the most critical part of stainless steel pipe welding. It is not only related to the quality of the project, but also related to the progress of the project. At present, the back welding of stainless steel pipe is divided into two processes: back-filling and non-argon filling. Argon-filled back protection is divided into solid wire + TIG process and solid wire + TIG + water-soluble paper process; back without argon-filled protection is divided into flux-cored wire backing and welding rod (coated wire) backing TIG welding. [0003] TIG welding (Tungsten Inert Gas arc Weiding), also known as inert gas tungsten shielded welding. Whether it is manual welding or automatic weldi...

Claims

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Application Information

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IPC IPC(8): B23K9/235B23K9/173B23K9/16B23K101/06
CPCB23K9/235B23K9/16B23K9/173
Inventor 俞谷峰
Owner 无锡市迪索数控焊接设备有限公司
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