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Novel active agent used for TIG (Tungsten Inert Gas) welding of magnesium alloy

A technology of argon tungsten arc and active agent, which is applied in the direction of arc welding equipment, welding equipment, welding medium, etc.

Inactive Publication Date: 2012-02-08
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TIG welding after the acetone evaporates

Method used

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  • Novel active agent used for TIG (Tungsten Inert Gas) welding of magnesium alloy
  • Novel active agent used for TIG (Tungsten Inert Gas) welding of magnesium alloy
  • Novel active agent used for TIG (Tungsten Inert Gas) welding of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] Active agent weight ratio is TiO 2 : 60% and CaF 2 : 40%. TiO 2 and CaF 2 The active agent powders are thoroughly milled and mixed in proportion, and then acetone is added to the mixture to make a paste. Then use a flat brush to evenly coat the pasty active agent on the upper surface of the sample, the coating width is about 40mm, and the coating thickness is about 0.3mm. Solder after the acetone evaporates.

[0014] The welding specifications adopted for TIG welding of AZ31 magnesium alloy plates with a plate thickness of 5mm are:

[0015]

[0016] Under this welding specification condition, compared with the welded joints not coated with this active agent, the penetration depth of the welded joints coated with the active agent is increased by 43%, and the tensile properties are increased by 58%. In addition, the porosity in the weld seam is significantly reduced after coating the active agent, which solves the problems of shallow penetration and porosity that...

example 2

[0018] Active agent weight ratio is TiO 2 : 62% and CaF 2 : 38%. TiO 2 and CaF 2 The active agent powders are thoroughly milled and mixed in proportion, and then acetone is added to the mixture to make a paste. Then use a flat brush to evenly coat the pasty active agent on the upper surface of the sample, the coating width is about 40mm, and the coating thickness is about 0.3mm. Solder after the acetone evaporates. The welding parameters are the same as Example 1.

example 3

[0020] Active agent weight ratio is TiO 2 : 65% and CaF 2 : 35%. TiO 2 and CaF 2 The active agent powders are thoroughly milled and mixed in proportion, and then acetone is added to the mixture to make a paste. Then use a flat brush to evenly coat the pasty active agent on the upper surface of the sample, the coating width is about 40mm, and the coating thickness is about 0.3mm. Solder after the acetone evaporates. The welding parameters are the same as Example 1.

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Abstract

The invention discloses a novel active agent used for TIG (Tungsten Inert Gas) welding of magnesium alloy, belonging to the active agent welding technology. The active agent is characterized in that the active agent consists of, by weight percent, 60-65 TiO2 and 35-40 CaF2, and is prepared through the following steps: first, grinding and then mixing TiO2 and CaF2 active agent powder by proportion; second, adding acetone to the mixture to enable the mixture to turn to paste; and then evenly coating the pasty active agent on the upper surface of a test sample through a flat brush, wherein the coating width is about 40mm and the coating thickness is about 0.3mm. The active agent can be used for TIG welding after the acetone volatilizes. Compared with the welding joints without being coated with the active agent in the welding process, the welding joint obtained through the welding technique disclosed by the invention has the advantages that the weld penetration is improved by 43% and the tensile property is improved by 58%. In addition, porosity in the welding line is remarkably reduced after the active agent is coated, thus solving the difficulties of the existence of hydrogen pores and shallow weld penetration.

Description

technical field [0001] The invention is an active agent used in magnesium alloy tungsten argon arc welding. Including the following process, it is characterized in that: before welding, TiO 2 and CaF 2 The active agent powders are milled and mixed in proportion, and then acetone is added to the mixture to make a paste. Then use a flat brush to evenly coat the pasty active agent on the upper surface of the sample, the coating width is about 40mm, and the coating thickness is about 0.3mm. Argon tungsten arc welding is performed after the acetone evaporates. Background technique [0002] Magnesium alloy has a series of advantages such as low density, high specific strength, good electromagnetic shielding and easy recycling. It is called the green engineering material of the 21st century and is widely used in automobiles, aerospace and electronics industries. As a country with large magnesium resources, the industrial application of magnesium alloys has become one of the nat...

Claims

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Application Information

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IPC IPC(8): B23K35/36B23K9/16
Inventor 沈骏王林志
Owner CHONGQING UNIV
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