Magnesium alloy weld joint surface nanocrystallization device and method

A technology of welding seam surface and magnesium alloy, applied in auxiliary devices, electrode support devices, welding equipment, etc., can solve problems such as limited ability to solve, coarse grains, reduced mechanical properties of joints, etc., to eliminate discontinuity and stress concentration. , the effect of eliminating residual stress

Active Publication Date: 2017-03-22
NANJING INST OF TECH
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  • Application Information

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Problems solved by technology

At present, different welding methods and means have been used in research to eliminate or weaken the above-mentioned shortcomings of magnesium alloy welded joints, but these methods have very limited ability to solve the above-mentioned problems
Due to the characteristics of high thermal conductivity, large expansion coefficient, lower melting point

Method used

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  • Magnesium alloy weld joint surface nanocrystallization device and method
  • Magnesium alloy weld joint surface nanocrystallization device and method
  • Magnesium alloy weld joint surface nanocrystallization device and method

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Embodiment Construction

[0028] In order to better understand the technical features, technical contents and technical effects of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are not intended to limit the present invention.

[0029] like figure 1 As shown, a magnesium alloy weld surface nanometerization device includes a plate feeding roller group 1, a welding torch 2, a water quenching device 3, a shot blasting device 4, a welding platform 5, and a shaping roller group 6.

[0030] The upper and lower plate feeding rollers of plate feeding roller group 1 are set facing each other, and the magnesium alloy plate is sent into the welding channel through the plate feeding roller set; Group 1 moves the welded magnesium alloy sheet out of the welding channel. Between the plate feeding roller group 1 and the shaping roller group 6 is a welding area, and a welding platform 5 is arranged in the welding area, a...

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Abstract

The invention discloses a magnesium alloy weld joint surface nanocrystallization device and method. The device comprises a plate feeding roller wheel set, a welding gun, a water chilling device, a shot blasting device, a welding platform and a shaping rolling wheel set. The welding gun and the shot blasting device are arranged above a magnesium alloy plate. A self-developed magnesium alloy welding wire is arranged in the welding gun. The water chilling device is arranged below the magnesium alloy plate. A base material is fed into a welding channel through the roller wheel set and then is subjected to butt welding through an argon tungsten-arc welding method, and a weld joint obtained after welding is completed is subjected to water chilling and shot blasting treatment. The magnesium alloy welding wire of the device promotes dispersed precipitation of a strengthening phase in a non-equilibrium solidification welding connector structure, the water chilling device has a fast cooling function on a melting pool just formed, grains are refined, and the mechanical property of the magnesium alloy weld joint is improved.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a device and a method for nanometerizing the surface of a magnesium alloy weld seam. Background technique [0002] Welding technology is a key processing technology for the manufacture of magnesium alloy products, but the welding performance of magnesium alloys is not good, and it is difficult to achieve reliable connections. For this reason, magnesium alloy structural parts and the connection between magnesium alloy and other material structural parts have become a technical bottleneck restricting the application of magnesium alloys and one of the key technologies to be solved urgently. The reliability of magnesium alloy welded joints has become an urgent problem in its application. At present, magnesium alloys are being used in the manufacture of many load-bearing structural parts, such as magnesium alloy steering wheel skeletons in automobile manufacturing, automa...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/025B23K9/28B23K9/32B23K35/28B23K37/00
CPCB23K9/025B23K9/167B23K9/28B23K9/32B23K35/284B23K37/003
Inventor 初雅杰李建丁书剑吴少君
Owner NANJING INST OF TECH
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