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Welding process for carbon steel process pipeline

A technology for process pipes and welding processes, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as high welder skill requirements and unstable welding quality, and achieve improved welding quality, high production efficiency, and less welding slag. Effect

Active Publication Date: 2012-07-04
江苏利柏特股份有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Another technical problem to be solved by the present invention is to provide a welding process for carbon steel process pipes. The bottom welding in this welding process overcomes the bottleneck of unstable welding quality and high requirements for welders in the prior art. The weld shape of the process is beautiful, the weld pattern is uniform, the heat input is small, the structure is compact, the weld quality is stable, the welding essentials are easy to master, and the weld quality of the inner wall of the pipe is high

Method used

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Examples

Experimental program
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Embodiment Construction

[0034] The present invention will be described in further detail below through specific examples.

[0035] A carbon steel process pipeline welding process, comprising the following steps:

[0036] A. Preparation before welding, including the following sub-steps: a1) Select the tool, choose a 75° argon arc welding torch with a diameter of 40-50mm 2 A handle wire with a length of 3-4m, a cerium tungsten electrode with a diameter of 2.0mm or 2.4mm, the tip of the cerium tungsten electrode is processed into a truncated conical shape with a taper of 35°-45°, and the diameter of the small circle of the truncated cone is 0.8-1.0mm. The protruding length of the cerium tungsten electrode relative to the porcelain nozzle of the argon arc welding torch is 6-8mm; choose CO 2 / MAG semi-automatic welding machine and CO 2 Flow meter, CO exposed by flux-cored wire before arcing 2 The length of the contact tip of the gas shielded welding torch is 15-20mm;

[0037]a2) The acceptance inspect...

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Abstract

The invention discloses a welding process for a carbon steel process pipeline. In the welding process, manual argon arc welding is adopted to process a backing weld; flux-cored wire CO2 gas shielded welding is adopted on a filling cover surface; CO2 adsorbs heat in the process of protecting a weld pool, can reduce the temperature on the periphery of the weld pool and take the effect of constricting electric arc, so that the heat input is low and the weld quality is high; the manual arc welding is replaced; no rod stub is generated; few welding slags are generated; little smoke dust is generated; the welding production efficiency is high; and an attractive weld joint is formed.

Description

technical field [0001] The invention relates to a welding process, in particular to a carbon steel process pipe welding process. Background technique [0002] Carbon steel process pipe welding quality requirements are higher. Usually, manual argon arc welding is used for bottom welding, and manual arc welding is used for filling and covering. Due to the low deposition efficiency and slow welding speed of manual arc welding, and the use of electrodes in manual arc welding, the deposition efficiency of electrodes is low, the energy consumption is large, and leaving the electrode head is easy to cause waste of resources. Electrodes also need to be dried and stored in heat preservation, which makes the overall efficiency of manual arc welding low and the cost high. In addition, in the welding of carbon steel process pipes, root welding is the most complicated and difficult. During root welding, the arc often stays on both sides of the groove for an uneven time, and the arc len...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235
Inventor 方战华霍吉良陈杰恒
Owner 江苏利柏特股份有限公司
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