Technological method for welding 304 stainless steel plate

A technology of 304 stainless steel and process method, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of low production efficiency, slow welding speed, large heat input of joints, etc., and achieve high production efficiency, Reduced heat input, good forming effect

Active Publication Date: 2020-09-25
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of slow welding speed, large joint heat input, low production efficiency, etc. in traditional gas metal shielded welding welding of 304 stainless steel, and laser arc hybrid welding is very easy to produce pores in the weld seam of 304 stainless steel plates Problem, provide a process method for welding 304 stainless steel plates

Method used

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  • Technological method for welding 304 stainless steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) 304 stainless steel plates with a thickness of 10mm are laser cut to obtain 304 stainless steel plates with a Y-shaped bevel, the thickness of the blunt side of the Y-shaped bevel is 3mm, and the angle between the double slopes is 45 °, as figure 1 shown. Then use acetone to remove the oil stain on the surface of the 304 stainless steel plate, and finally use mechanical polishing to remove the oxide film within 25mm on both sides of the joint until the metallic luster is exposed.

[0052] (2) Fix the surface-treated 304 stainless steel plate on a device with protective gas, and adjust the angle between the laser emitted by the laser and the 304 stainless steel plate to be 80°, and control the laser inclination direction to be consistent with the welding direction.

[0053] (3) Bottom welding: first set the laser parameters and MIG welding parameters, the laser power is 5000W, the defocus is 0mm, the distance between the light wires is 1.5mm, the welding speed is 32m...

Embodiment 2

[0056] (1) 304 stainless steel plates with a thickness of 10mm are laser cut to obtain 304 stainless steel plates with a Y-shaped bevel, the thickness of the blunt side of the Y-shaped bevel is 3mm, and the angle between the double slopes is 45 °, as figure 1 shown. Then use acetone to remove the oil stain on the surface of the 304 stainless steel plate, and finally use mechanical polishing to remove the oxide film within 25mm on both sides of the joint until the metallic luster is exposed.

[0057] (2) Fix the surface-treated 304 stainless steel plate on a device with a protective gas on the back, and adjust the angle between the laser emitted by the laser and the 304 stainless steel plate to be 80°, and control the inclination direction of the laser to be consistent with the welding direction.

[0058] (3) Bottom welding: first set the laser parameters and MIG welding parameters, the laser power is 4000W, the defocus is 0mm, the distance between the light wires is 1.5mm, the...

Embodiment 3

[0061] (1) 304 stainless steel plates with a thickness of 10mm are laser cut to obtain 304 stainless steel plates with a Y-shaped bevel, the thickness of the blunt side of the Y-shaped bevel is 3mm, and the angle between the double slopes is 45 °, as figure 1 shown. Then use acetone to remove the oil stain on the surface of the 304 stainless steel plate, and finally use mechanical polishing to remove the oxide film within 25mm on both sides of the joint until the metallic luster is exposed.

[0062] (2) Fix the surface-treated 304 stainless steel plate on a device with protective gas, and adjust the angle between the laser emitted by the laser and the 304 stainless steel plate to be 80°, and control the laser inclination direction to be consistent with the welding direction.

[0063] (3) Bottom welding: first set the laser parameters and MIG welding parameters, the laser power is 6000W, the defocus is 0mm, the distance between the light wires is 1.5mm, the welding speed is 40m...

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Abstract

The invention relates to the technical field of plate welding, and discloses a technological method for welding a 304 stainless steel plate. The technological method for welding the 304 stainless steel plate comprises the following steps that (1) the 304 stainless steel plate is machined to obtain a 304 stainless steel plate with a Y-shaped groove; (2) g the 304 stainless steel plate obtained in the step (1) is pretreated, and then the 304 stainless steel plate is fixed to a device with protective gas introduced; (3) the included angle between the laser emitted by a laser and the 304 stainlesssteel plate obtained in the step (2) is adjusted to enable the included angle to be 70-90 degrees; and (4) backing welding and cover welding are carried out in sequence. The method is simple and easyto operate, and the production efficiency is high; and through the coupling between laser parameters and gas metal arc welding parameters, the heat input of a 304 stainless steel plate joint is reduced, the thermal crack sensitivity of a welding line is reduced, and the porosity of the welding line is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of plate welding, in particular to a process method for welding 304 stainless steel plates. Background technique [0002] Because 304 stainless steel has excellent corrosion resistance and good toughness, it is widely used in the construction industry, automobile industry and daily life. At present, the welding method of 304 stainless steel plate mainly adopts the traditional metal gas shielded welding. Although the internal quality of the weld can be guaranteed, the welded joint has large heat input, many welding times, large heat-affected area, and thermal crack sensitivity. high and low production efficiency. The laser arc hybrid welding method with high energy density can obtain 304 stainless steel welded joints with small heat affected area, small heat input and high production efficiency, but the laser arc hybrid welding method is very easy to produce in the weld seam of 304 stainless steel plate Por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/60B23K33/00B23K35/38B23K103/04
CPCB23K26/348B23K26/60B23K33/004B23K35/383B23K2103/05
Inventor 王泽龙唐新新刘正林郑帮智
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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