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High-entropy flux-cored wire used for magnesium-steel MIG welding and preparation method thereof

A flux-cored welding wire, high-entropy technology, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of brittle intermetallic compound welding joint strength reduction, etc., to achieve the elimination of brittle intermetallic compound phase, excellent Strength and toughness, good adaptability

Inactive Publication Date: 2018-06-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention organically combines flux-cored welding wire technology and high-entropy alloy technology to obtain a high-entropy flux-cored welding wire. The purpose is to solve the problem of brittle intermetallic compounds that are easily formed when MIG welding wire is directly welded to magnesium-steel in the prior art. The problem of reducing the strength of welded joints

Method used

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  • High-entropy flux-cored wire used for magnesium-steel MIG welding and preparation method thereof
  • High-entropy flux-cored wire used for magnesium-steel MIG welding and preparation method thereof
  • High-entropy flux-cored wire used for magnesium-steel MIG welding and preparation method thereof

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described in detail below.

[0025] A high-entropy flux-cored wire for magnesium-steel MIG welding, including a powder and a sheath.

[0026] The powder is prepared according to the atomic percentage of the following components, the total atomic percentage is 100%, of which Fe 5~15%, Mg10%~20%, Cr 20%~45%, Ni 21%~39%, Cu 5%~13 %;

[0027] The sheath material is industrial high-purity copper strip (99.99%) with a width of 10±0.1mm and a thickness of 0.5±0.03mm.

[0028] The preparation method of the above-mentioned high-entropy flux-cored welding wire is implemented according to the following steps:

[0029] Step 1. Melting master alloy

[0030] Composition by atomic percentage (see Table 1), the total atomic percentage is 100%. Convert the atomic percentage into mass percentage, and weigh various high-purity metals (99.99%) according to the mass percentage; mix the above metal materials in a ball mill (five kilog...

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Abstract

The invention discloses a high-entropy flux-cored wire used for magnesium-steel MIG welding. The powder is prepared from the components of, by atom, 5%-15% of Fe, 10%-20% of Mg, 20%-45% of Cr, 21%-39%of Ni, and 5%-13% of Cu, wherein the total percentage is 100%; and an outer skin material adopts an industrial high-purity copper strip. The preparation method of the high-entropy flux-cored wire comprises the steps that 1, melting preparing is carried out to form a master alloy; 2, a vacuum gas atomization powder manufacturing technology is adopted to prepare the atomized powder; and 3, flux-cored wire forming unit equipment is adopted to prepare the high-entropy flux-cored wire. The high-entropy flux-cored wire is used for carrying out magnesium-steel MIG welding, so that a high-quality magnesium-steel welded joint is obtained, the chemical components of the weld metal are located within the pivot element range of the high-entropy alloy, and high entropy of the welded joint is achieved;and the welded joint has excellent strength and toughness, the brittle intermetallic compound phase is effectively eliminated, and the comprehensive mechanical property is good.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a high-entropy flux-cored welding wire for magnesium-steel MIG welding and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly serious energy and environmental problems, there are urgent requirements for product lightweight in the manufacturing industries of aircraft, automobiles, trains, ships, etc., as well as in the fields of energy, aerospace, and national defense. Magnesium and magnesium alloys play an important role in the process of product lightweight due to their excellent properties of low density and high specific strength. The weight of magnesium-steel composite parts is equivalent to 50~60% of steel, and at the same time it has other excellent characteristics of magnesium and steel. It can improve material utilization, reduce structural weight, improve corrosion resistance of parts, and reduce costs. On the one hand,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/304B23K35/40
Inventor 董鹏郭燕阳王勇张红霞闫志峰杨潇王文先
Owner TAIYUAN UNIV OF TECH
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