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Austenitic stainless steel pipeline welding process

A technology of austenitic stainless steel and welding technology, which is applied in pipeline systems, welding equipment, manufacturing tools, etc., can solve problems such as poor mechanical properties, difficult control of heat input, and poor welding quality of products, so as to reduce welding stress, It is beneficial to the control of the interlayer temperature and the effect of increasing the welding speed

Inactive Publication Date: 2014-07-02
深圳市泰克尼林科技发展有限公司
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Problems solved by technology

[0003] However, because austenitic stainless steel is sensitive to overheating, when two sections of austenitic stainless steel pipe are welded together by traditional welding methods, the heat input is not easy to control, which will easily lead to poor welding quality and poor mechanical properties of the product

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  • Austenitic stainless steel pipeline welding process
  • Austenitic stainless steel pipeline welding process
  • Austenitic stainless steel pipeline welding process

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Embodiment approach

[0025] refer to figure 1 , the embodiment of the austenitic stainless steel pipe welding process of the present invention comprises the following steps:

[0026] Step S11, according to the diameter of the pipeline, the welding joint of the pipeline is positioned before welding according to a certain rule, so as to divide it into several welding sections. Wherein, the part between two adjacent positioning points is defined as a welding segment. The arc lengths of each welding section should be approximately equal, preferably equal, so that the welding will be relatively neat.

[0027] In step S11, it is possible to divide the pipe weld joints into four large welding areas corresponding to each quadrant by dividing the quadrants according to the vertical coordinate system. It is convenient and quick to locate the area and divide it into several welding sections.

[0028] Specifically, as figure 2 , when the pipe diameter d≤89mm, each welding area has only one welding sectio...

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Abstract

The invention discloses an austenitic stainless steel pipeline welding process. The welding process includes the following steps: performing pre-welding positioning on pipeline weld junctions according to pipe diameter of pipelines and certain rules so as to divide into a plurality of welding sections, wherein the part between every two adjacent positioning points is one welding section; welding the pipeline weld junctions in each welding section by adopting a symmetrical dispersed skip welding mode according to certain welding parameters. By the means, heat input is low during welding, welding quality can be improved, and further pipelines welded together are good in mechanical property.

Description

technical field [0001] The invention relates to a butt welding method, in particular to an austenitic stainless steel pipeline welding process. Background technique [0002] Austenitic stainless steel refers to stainless steel with austenitic structure at room temperature. When the steel contains about 18% Cr, Ni8%-10%, and C about 0.1%, it has a stable austenite structure. Austenitic chromium-nickel stainless steel includes common 18Cr-8Ni steel and high Cr-Ni series steel developed on the basis of increasing Cr and Ni content and adding Mo, Cu, Si, Nb, Ti and other elements. Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but its strength is low. It is impossible to strengthen it through phase transformation. It can only be strengthened by cold working. If Ca, Se, Te and other elements are added, it has good free cutting sex. In addition to the corrosion resistance of oxidizing acid medium, this kind of steel can also resist the corrosi...

Claims

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Application Information

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IPC IPC(8): B23K9/02B23K9/235B23K101/10
CPCB23K9/173B23K9/0282B23K9/235B23K31/125B23K33/006B23K2101/10B23K2103/04
Inventor 江莉冷小琪李兴华魏鹏罗仁安叶龙王尧
Owner 深圳市泰克尼林科技发展有限公司
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