Device for eliminating welding residual stress based on electromagnetic energy

A technology of residual stress and electromagnetic energy, which is applied to the improvement of process efficiency, heat treatment equipment, furnace, etc., can solve the problems of low processing efficiency and high noise, and achieve the effect of improving efficiency, improving performance and strong adaptability

Pending Publication Date: 2019-11-29
INNER MONGOLIA UNIV OF SCI & TECH +2
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Vibration processing method has high equipment noise and low processing efficiency, and can only process relatively flat and thin welded joints

Method used

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  • Device for eliminating welding residual stress based on electromagnetic energy
  • Device for eliminating welding residual stress based on electromagnetic energy
  • Device for eliminating welding residual stress based on electromagnetic energy

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Effect test

specific Embodiment 1

[0049] Q690 steel plate is used as the welding base material, the size of the test plate is 500×200×15mm, and a “V”-shaped groove is made along the length direction at 1 / 2 of the width of the test plate, and the groove angle is 60°. The welding adopts argon-rich mixed gas shielded welding (MAG welding), the polarity is DC+, the welding wire is flux-cored wire CHT100CK3, and the welding process uses Ar+20% CO 2 Gas protection, gas purity over 99.98%. Table 1 is the chemical composition of the base metal and welding consumables, Table 2 is the mechanical properties of the materials, and Table 3 is the welding parameters. The blind hole stress release method is used for the measurement of welding residual stress. There are 6 measuring points located in the center of the weld, and the distance between the measuring points is >10mm.

[0050] Table 1 Chemical composition of base metal and welding consumables (mass fraction, %)

[0051]

[0052] Table 2 Mechanical properties of ...

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Abstract

The invention discloses a device for eliminating welding residual stress based on electromagnetic energy. The device includes a power supply system, an electromagnetism generator system and a coolingsystem, wherein the electromagnetism generator system includes a plurality of electromagnetic generators, and each electromagnetic generator includes a coil and a U-shaped iron core; the U-shaped ironcore is wound with the coil, and all the cores are connected with the power supply system; the cooling system is used for cooling the electromagnetism generator system; the electromagnetism generatorsystem is positioned right above a welding plate to be treated; and the treatment time for eliminating the welding residual stress is defined according to the length of the welding plate to be treated and amount of the U-shaped iron cores. According to the invention, energy for eliminating the welding residual stress is provided, joint microstructures cannot be affected, and corresponding performance of the joint is improved; stress relief is carried out instantly along with welding equipment, and can be carried out after welding is completed, so that high adaptation is realized.

Description

technical field [0001] The invention relates to the technical field of welding residual stress treatment, in particular to a device for removing welding residual stress based on electromagnetic energy. Background technique [0002] Welding residual stress has a negative impact on the strength, corrosion resistance, fatigue resistance and other properties of welded joints. After welding, it is usually necessary to take corresponding measures and measures to eliminate welding residual stress. The methods commonly used in production include post-weld heat treatment, ultrasonic treatment, vibration treatment, etc. The above methods apply energy to the welded joint in a specific way to promote stress relaxation in the joint, thereby eliminating the welding residual stress. That is to say, providing a certain amount of energy from the outside is a prerequisite for eliminating the welding residual stress. [0003] The energy generated by the pulsed magnetic field can be used to el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/04C21D9/50
CPCC21D1/04C21D9/50Y02P10/20
Inventor 刘永珍吕占祥冯崴崴李运良王文君付栋栋麻永林
Owner INNER MONGOLIA UNIV OF SCI & TECH
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