Welding device and welding method for solving high nitrogen steel welding porosity and improving joint strength

A technology of joint strength and welding device, which is applied in welding/welding/cutting items, welding equipment, laser welding equipment, etc. Improve mechanical properties and reduce porosity

Active Publication Date: 2018-01-19
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to achieve the above object, the present invention provides a welding device that solves the welding porosity of high-nitrogen steel and improves the joint strength, and solves the problems of high-nitrogen steel in the prior art that are prone to gas generation, weld zone and weld heat-affected zone nitride during welding. , carbides and carbonitrides are easy to precipitate, and the weld grains are coarse, thereby improving the mechanical properties of high-nitrogen steel welded joints and improving the toughness of the welding heat-affected zone

Method used

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  • Welding device and welding method for solving high nitrogen steel welding porosity and improving joint strength
  • Welding device and welding method for solving high nitrogen steel welding porosity and improving joint strength
  • Welding device and welding method for solving high nitrogen steel welding porosity and improving joint strength

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Effect test

Embodiment 1

[0040] The welding method of the above-mentioned device is specifically carried out in accordance with the following steps:

[0041] Step 1: Install and debug the device, clamp two welded workpieces 6 made of high-nitrogen steel with a thickness of 8.0mm and a nitrogen content of 0.5-0.7% on the first workpiece support plate 7 and the second On the workpiece support plate 8;

[0042] Step 2: Open the water inlet valves of the first water-passing copper pipe 4 and the second water-passing copper pipe 5, adjust the circulating water temperature in the first water-passing copper pipe 4 and the second water-passing copper pipe 5 to 15°C, and the circulating water flow rate 12L / min; turn on the excitation power supply 16, start the power supply of the CNC workbench, YAG laser and welding torch 2 synchronously, the YAG laser emits a laser beam 1, and the laser beam 1 is irradiated vertically on the front of the welding workpiece 6 to form a laser keyhole 20; welding torch 2 Welding...

Embodiment 2

[0045] The welding method of the above-mentioned device is specifically carried out in accordance with the following steps:

[0046] Step 1: Install and debug the device, clamp two welded workpieces 6 made of high-nitrogen steel with a thickness of 8.0mm and a nitrogen content of 0.5-0.7% on the first workpiece support plate 7 and the second On the workpiece support plate 8;

[0047] Step 2: Open the water inlet valves of the first water-passing copper pipe 4 and the second water-passing copper pipe 5, adjust the circulating water temperature in the first water-passing copper pipe 4 and the second water-passing copper pipe 5 to 10°C, and the circulating water flow rate 15L / min; turn on the excitation power supply 16, start the power supply of the CNC workbench, YAG laser and welding torch 2 synchronously, CO 2 The laser emits a laser beam 1, and the laser beam 1 is vertically irradiated on the front of the welding workpiece 6 to form a laser keyhole 20; the welding torch 2 pe...

Embodiment 3

[0050] The welding method of the above-mentioned device is specifically carried out in accordance with the following steps:

[0051] Step 1: Install and debug the device, clamp two welded workpieces 6 made of high-nitrogen steel with a thickness of 8.0mm and a nitrogen content of 0.5-0.7% on the first workpiece support plate 7 and the second On the workpiece support plate 8;

[0052] Step 2: Open the water inlet valves of the first water-passing copper pipe 4 and the second water-passing copper pipe 5, adjust the circulating water temperature in the first water-passing copper pipe 4 and the second water-passing copper pipe 5 to 20°C, and the circulating water flow rate 10L / min; turn on the excitation power supply 16, start the power supply of the CNC workbench, YAG laser and welding torch 2 synchronously, the semiconductor laser emits a laser beam 1, and the laser beam 1 is vertically irradiated on the front of the welding workpiece 6 to form a laser keyhole 20; welding torch ...

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Abstract

The invention discloses a welding device and a welding method for solving high-nitrogen steel welding pores and improving joint strength, and belongs to the field of welding technology. Two welding workpieces are fixed on the first workpiece support plate and the second workpiece support plate in the form of butt joint On the top, a weld joint gap is formed between the two welding workpieces. There is a groove on the front of the welding workpiece and the gap between the weld joints. The pipe wall of the first water-passing copper pipe and the pipe wall of the second water-passing copper pipe are close On both sides of the groove; the excitation coil is placed on the back of the welding workpiece, the laser beam is irradiated vertically on the front of the welding workpiece, the welding torch is placed on the front of the welding workpiece, the laser beam, the weldment joint gap and the excitation coil are coaxial. It solves the problems in the prior art that high-nitrogen steel is prone to gas, nitrides, carbides and carbonitrides during the welding process, and the weld grains are coarse, thereby improving the mechanical properties of high-nitrogen steel welded joints and improving the Toughness in the heat-affected zone of the weld.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a welding device and a welding method for solving high-nitrogen steel welding porosity and improving joint strength, especially using a magnetic control and temperature control composite method to solve high-nitrogen steel laser-arc composite welding porosity and improving A welding device for joint strength and a welding method thereof. Background technique [0002] High-nitrogen austenitic stainless steel (high-nitrogen steel) is an engineering material that has received widespread attention in recent years. Its N content generally exceeds 0.4%, and the N element is mainly used to partially or completely replace the alloying element Ni to obtain an austenite structure. High nitrogen steel has high strength and toughness, and also has good corrosion resistance. Due to its excellent performance, high nitrogen steel has become an important material in the field of industry and eng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/348B23K26/60
CPCB23K26/348B23K26/60B23K2103/04
Inventor 刘双宇刘凤德李彦清刘佳张宏石岩陈实现黄根哲徐春鹰
Owner CHANGCHUN UNIV OF SCI & TECH
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