Method and device for refining weld joint structures by using pulsed magnet fields in welding process

A welding process and pulsed magnetic field technology, applied in welding equipment, arc welding equipment, welding accessories, etc., can solve the problems of unclear description of the working nature of the magnetic field, difficulty in controlling the weld structure, and complicated installation and layout of the excitation coil, etc., to achieve The form and variety of magnetic field are rich, easy to implement and popularize, and reduce the effect of chemical inhomogeneity

Active Publication Date: 2013-01-02
BAOSHAN IRON & STEEL CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the extremely complicated installation and layout of the excitation coil involved in this patent, the description of the coil structure, excitation parameters and the working nature of the magnetic field is not clear, and there are many equipment stations involved, it is difficult to achieve the goal of controlling the weld structure in specific operations

Method used

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  • Method and device for refining weld joint structures by using pulsed magnet fields in welding process
  • Method and device for refining weld joint structures by using pulsed magnet fields in welding process
  • Method and device for refining weld joint structures by using pulsed magnet fields in welding process

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Embodiment

[0067]Al-6.5%Cu aluminum-copper alloy was used as the simulated weld material, which was heated to 750°C and then poured into a steel back cover mold preheated at 600°C to simulate the solidification of the weld metal in the V-groove with backing plate. In the case of other conditions being the same, the weld solidification structure obtained with or without the action of the magnetic field was compared to determine the effect of the pulsed magnetic field on the weld microstructure refinement. The main dimensions of the steel mold are shown in Figure 8. The length of the weld is 70 mm, the width of the opening is 30 mm, and the width of the bottom is 10 mm. The C-type or E-type coil is pressed on the steel mold. In the case of a magnetic field, the magnetic force line of the magnetic field is perpendicular to the direction of the weld, and the simulated weld material is solidified under the action of the pulsed magnetic field. The magnetic field parameters are: pulse voltage 1...

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Abstract

The invention relates to a processing technology for refining weld joint structures in a welding process, in particular to a method and a device for refining weld joint structures by using pulsed magnet fields in the welding process, and belongs to the technical field of welding. The method for refining weld joint structures by using pulsed magnet fields in the welding process includes that welding is performed by using an ordinary gas metal arc welding method, an applied magnetic field is added above a gas metal arc welding pool, mechanical movement and welding gun movement of the magnet fields are synchronous, electric arc and melt drip transition action is controlled by the magnet fields in a welding process, metal melt in the gas metal arc welding pool is forced to move, an electromagnetic stirring effect is produced, and weld joint structures are finally refined in the welding process. According to the method and the device, in the welding process, the weld joint structures are refined, welding defects are reduced, and further the cost is reduced, and the welding quality and the production efficiency are improved.

Description

technical field [0001] The invention relates to a welding seam structure refinement treatment technology in a welding process, in particular to a method and a device for refining a weld crystal structure by a pulsed magnetic field, belonging to the field of welding technology. Background technique [0002] Welding is an important processing method in mechanical manufacturing, especially in the production of structural parts. For some large components, such as pressure vessels, ship plates, and large-diameter thick-walled pipes, the weld performance largely determines the quality and safety of components. Due to the characteristics of the welding technology itself and the limitations of other factors, it is difficult for the actual weld performance to be exactly the same as that of the base metal. Compared with the base metal, the weld often has problems of coarse structure and poor performance. In order to ensure the quality and safety of welded parts, refining the weld st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/32
Inventor 周月明傅建钦
Owner BAOSHAN IRON & STEEL CO LTD
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