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Method for reducing die-casting magnesium alloy melting weld porosity

A weld porosity and fusion welding technology, which is applied in welding equipment, metal processing equipment, laser welding equipment, etc., can solve complex academic and engineering problems, and achieve the effect of reducing porosity, weld porosity, and nitrogen porosity

Inactive Publication Date: 2015-08-12
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In conclusion, the problem of weld porosity in fusion welding of die-casting magnesium alloys is a complex academic and engineering problem, and the existing technology has not yet solved the problem well.

Method used

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  • Method for reducing die-casting magnesium alloy melting weld porosity
  • Method for reducing die-casting magnesium alloy melting weld porosity
  • Method for reducing die-casting magnesium alloy melting weld porosity

Examples

Experimental program
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Effect test

example 1

[0033] Reference example 1: The extruded AM60 magnesium alloy welding wire without yttrium element is used as the filler material for welding, and the weld porosity is 30.24%.

Embodiment 1

[0034] Embodiment 1: adopt the AM60 welding wire that contains yttrium element: 3 wt.% to carry out welding as filler material, weld porosity is 21.16%, and porosity reduces 33.87% than reference example 1, comparatively obviously reduces weld seam porosity, welding Quality improved.

Embodiment 2

[0035] Example 2: The AM60 welding wire containing 5 wt.% of yttrium element is used as the filler material for welding. The weld porosity is 18.16%, and the porosity is 39.95% lower than that of reference example 1, which significantly reduces the weld porosity and improves the welding quality. improve.

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Abstract

The invention provides a method for reducing die-casting magnesium alloy melting weld porosity. When die-casting magnesium alloy melting is conducted, a magnesium alloy filling material containing an yttrium element is adopted for welding. During welding, the yttrium element and nitrogen have strong affinity and react with each other to generate a nitride, so that the number of nitrogen blowholes in a welding line is reduced; the yttrium element is used, so that solubility of hydrogen in a weld pool is increased, and the number of hydrogen blowholes is reduced; the yttrium element is used, so that fluidity of the weld pool is improved, overflow of gas such as nitrogen and hydrogen is accelerated, the weld porosity is reduced, and welding quality is improved. The method further has the advantages of being easy to operate, convenient, easy to implement and the like.

Description

technical field [0001] The invention relates to a magnesium alloy welding technology, in particular to a welding method for reducing the porosity of a die-casting magnesium alloy fusion welding seam. Background technique [0002] Magnesium alloy is currently the lightest commercial metal structure material, with low density, high specific strength, good damping and vibration reduction and electromagnetic shielding, good performance in die-casting and machining processes, etc. It is widely used in aerospace, road / rail transportation, 3C products , handheld tools, medical rehabilitation and sports leisure and other fields of application prospects are promising. At present, due to the excellent casting performance, the production of magnesium alloy parts is mainly based on die casting, and die castings account for more than 90% of magnesium alloy parts. However, when performing fusion welding on magnesium alloy die castings, a large number of pores with a size of approximat...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/32B23K26/60
CPCB23K26/24
Inventor 游国强赵旭段平安闫鹏张恒
Owner CHONGQING UNIV
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