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2205 dual-phase steel automatic welding method

An automatic welding and dual-phase steel technology, which is applied in welding equipment, plasma welding equipment, arc welding equipment, etc., can solve the problems of poor weld appearance quality, low production efficiency, arc dust pollution, etc., to achieve a neat and beautiful appearance, reduce The effect of saving workload and saving welding consumables

Inactive Publication Date: 2019-06-21
TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the quality of welded joints, only small-standard welding can be used for pressure-bearing welds, and electrodes above Φ4.0 mm are not recommended; and manual welding requires back cleaning, which is generally manual electric grinding, and the working environment is very poor
At the same time, the existing traditional manual welding welding technology has always had shortcomings such as high labor intensity, low production efficiency, arc dust pollution and poor appearance quality of welds.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] An automatic welding method for 2205 dual-phase steel, the method refers to: respectively adopting a PAW / TIG double-gun switching longitudinal seam automatic welding system and a PAW / TIG double-gun switching circular seam automatic welding system to weld the longitudinal seam and the circumferential seam of a cylinder.

[0013] When the plate thickness of the 2205 duplex stainless steel cylinder is 4~10mm, the I-type groove type is adopted, the groove planer is a straight edge and the straight edge is connected, and the automatic PAW (plasma arc welding) without filler wire is used for self-fluxing welding first. 1 time, and then switch to the automatic argon arc welding wire filling cover for 1 time.

[0014] When the plate thickness of the 2205 duplex stainless steel cylinder is 10~15mm, adopt the Y-shaped joint groove type, the groove angle is 75°, the single side is 37.5°, and the blunt side is 6mm. Automatic PAW (plasma arc) is not used to fill After 1 pass of wire...

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Abstract

The invention relates to a 2205 dual-phase automatic welding method. The method includes the steps that longitudinal seams and circular seams of a tube body are welded by adopting a PAW / TIG dual-gun switching longitudinal seam automatic welding system and a PAW / TIG dual-gun switching circular seam automatic welding system. When the slag thickness of the 2205 dual-phase stainless steel tube body is4-10 mm, an I-shaped groove type is adopted, a groove is planned to be a straight edge in a straight-edge butt-jointing mode, and automatic PAW is used for self fusion welding without filler wires once and then is switched to automatic argon arc welding for covering with the filler wires once; and when the slab thickness of the 2205 dual-phase stainless steel tube body is 10-15 mm, a Y-shaped joint groove type is adopted, the groove angle is 75 degrees, the unilateral is 37.5 degrees, the truncated edge is 6 mm, and the automatic PAW is used for self fusion welding without the filler wires once, and then is switched to automatic GTAW for covering with the filler wires 2-4 times until full welding. According to the 2205 dual-phase automatic welding method, back gouging is not needed, automatic welding is achieved, the welding production efficiency is high, no spatter, powder, arc light, and noise exist in the welding process, shapes of welding lines are neat and beautiful, and the quality of whole equipment is improved.

Description

technical field [0001] The invention relates to a welding method, in particular to an automatic welding method for 2205 dual-phase steel. Background technique [0002] 2205 duplex stainless steel equipment is widely used in the polyolefin equipment manufacturing industry, especially the core equipment steamer, fluidized bed dryer, steamer cyclone separator and dryer cyclone separator in the polypropylene plant. Chloride ions, all materials in contact with the medium of the equipment are made of 2205 dual-phase steel. Since the polyolefin industry has strict requirements on the chemical composition, mechanical properties and corrosion resistance of 2205 duplex steel welds, the traditional welding methods in this industry are manual electrode welding and argon arc welding. In order to ensure the quality of welded joints, only small-standard welding can be used for pressure-bearing welds, and electrodes above Φ4.0 mm are not recommended; and manual welding requires back cleani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/028B23K9/16B23K9/133B23K10/02
Inventor 马建强王慧马鹏举谢晓玲
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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