Welding process for stainless steel pipelines

A welding process, stainless steel technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as poor welding quality, difficult control of heat input, poor mechanical properties, etc., to achieve improved mechanical properties and strict and reasonable control of parameters , Reduce the effect of welding stress and deformation

Inactive Publication Date: 2016-06-15
CHONGQING SHANGKE MACHINERY MFG CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

When traditional welding methods are used to weld stainless steel pipes into one body, the heat input is not

Method used

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Embodiment Construction

[0016] Below in conjunction with embodiment the present invention will be further described, and its operating steps are as follows:

[0017] A stainless steel pipeline welding process, the process comprises the following steps:

[0018] (1) Material: SUS304 is selected as the pipe material; A132 is selected as the electrode material, the diameter of the electrode is Φ2.0mm, and the length of the electrode is 300mm; the wire material is H0Cr21Ni10;

[0019] (2) The drying temperature of the electrode is 250-300 ℃, and the baking time is 2-3 hours;

[0020] (3) Groove cleaning: Before the welding of the pipeline, the burrs on the welding joint should be cleaned with a file and a grinding wheel, and the dirt and paint within 30mm on the groove surface and the inner and outer surfaces should be cleaned with a stainless steel brush, acetone or other organic solutions , use a grinder to grind until the metallic luster is exposed, and the degreasing time is 2-3 hours;

[0021] (3)...

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Abstract

The invention discloses a welding process for stainless steel pipelines. The welding process for the stainless steel pipelines is characterized by comprising the following steps that 1, materials are prepared, and specifically, SUS304 is selected as the material of the pipelines; A132 is selected as the material of a welding rod, the diameter of the welding rod is phi 2.0 mm, and the length of the welding rod is 300 mm; H0Cr21Ni10 is selected as the material of a welding wire; 2, the drying temperature of the welding rod is 250 DEG C-300 DEG C, and the drying time is 2-3 h; 3, beveled edges are cleaned; 3, the beveled edge end surfaces of pipe openings need to be perpendicular to the center line, and the aligned clearance of the two pipe openings needs to be uniform; 4, the beveled edges are machined; 5, the pipelines are welded; 6, welding treatment is conducted; 7, argon filling is treated; and 8, metal welding spatter, molten slag, an oxide skin, burrs, weld beading, concave pits and greasy dirt on the inner and outer surfaces of the pipes are cleaned up. According to the welding process for the stainless steel pipelines, all the phase parameters of the process are controlled strictly and reasonably, the procedures are standard, the welding stress and deformation are reduced, and accordingly the mechanical properties of the welded pipelines are improved.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a stainless steel pipeline welding technology. Background technique [0002] H2O2 is a strengthening agent and highly corrosive. In the presence of alkali, iron, heavy metals and other impurities, it will be violently decomposed and explosive. The H2 and aromatic hydrocarbon working fluids used in production are also flammable and explosive dangerous chemicals. The production process is a system Pressurized continuous cycle chemical production process. Therefore, in the process of pipeline installation, the quality of welding directly affects the reliability of the product. Once the operation is violated, the light ones will not be able to operate normally, and the serious ones will cause catastrophic accidents. Therefore, hydrogen peroxide stainless steel pipeline welding is a very critical process. The quality of welding will directly affect the quality of H2O2. When traditi...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/235
Inventor 黄安民
Owner CHONGQING SHANGKE MACHINERY MFG CO LTD
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