Multi-scale particle modified Al-Mg alloy welding wire and preparation method thereof

An alloy welding wire, multi-scale technology, applied in welding equipment, metal processing equipment, welding medium, etc., can solve problems such as welding hot cracks and insufficient weld strength

Pending Publication Date: 2021-09-14
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this program is to provide a multi-scale particle modified Al-Mg alloy welding wire and its preparation method to solve the problems of welding hot cracks and insufficient weld strength when welding high-strength and ultra-high-strength aluminum alloys

Method used

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  • Multi-scale particle modified Al-Mg alloy welding wire and preparation method thereof
  • Multi-scale particle modified Al-Mg alloy welding wire and preparation method thereof
  • Multi-scale particle modified Al-Mg alloy welding wire and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: Its preparation method of the Al-Mg alloy welding wire of a kind of multi-scale particle modification, comprises the following steps:

[0033] Step 1: Select material: Mg: 5.5%; Mn: 1.0%; Cr: 0.05%; Cu: 1.0%; TiB 2 : 0.5%; TiC: 3.5%; the rest is Al and unavoidable impurity elements;

[0034] Step 2: Preparation of TiB containing submicron 2 Aluminum master alloys of particles and nanoscale TiC particles;

[0035] Step 3: Add submicron TiB 2 Aluminum master alloys of particles and nanoscale TiC particles, Al-Cr, Al-Cu and other master alloys are smelted in a melting furnace with a temperature controlled at 800-820°C and protected by an inert gas. After complete melting, add Mg and stir well uniform, and then carry out the melt purification process of refining degassing and slag removal;

[0036] Step 4: The controlled alloy melt after melt purification is introduced into the tundish for heat preservation at 800-820°C, and injected into the continuous se...

Embodiment 2

[0038] Embodiment 2: Its preparation method of the Al-Mg alloy welding wire of a kind of multi-scale particle modification, comprises the following steps:

[0039] Step 1: Select material: Mg: 7.5%; Mn: 0.1%; Cr: 0.05%; Cu: 0; TiB 2 : 3.5%; TiC: 0.5%; the rest is Al and unavoidable impurity elements;

[0040] Step 2: Preparation of TiB containing submicron 2 Aluminum master alloys of particles and nanoscale TiC particles;

[0041] Step 3: Add submicron TiB 2 Aluminum master alloys and Al-Cr master alloys with particles and nanoscale TiC particles are melted in a melting furnace with a temperature controlled at 780°C and protected by an inert gas. After complete melting, Mg is added, fully stirred evenly, and then refined to remove Melt purification process for gas deslagging;

[0042] Step 4: The controlled alloy melt after melt purification is introduced into the tundish for heat preservation at 760-800°C, and injected into the continuous semi-solid rheological extruder a...

Embodiment 3

[0044] Embodiment 3: Its preparation method of the Al-Mg alloy welding wire of a kind of multi-scale particle modification, comprises the following steps:

[0045] Step 1: Select material: Mg: 6.5%; Mn: 0.3%; Cr: 0.1%; Cu: 0.5%; TiB 2 : 1%; TiC: 2.5%; the rest is Al and unavoidable impurity elements;

[0046] Step 2: Preparation of TiB containing submicron 2 Aluminum master alloys of particles and nanoscale TiC particles;

[0047] Step 3: Add submicron TiB 2 Aluminum master alloys of particles and nanoscale TiC particles, Al-Cr, Al-Cu and other master alloys are smelted in a melting furnace with a temperature controlled at 760-820°C and protected by an inert gas. After complete melting, add Mg and stir well uniform, and then carry out the melt purification process of refining degassing and slag removal;

[0048] Step 4: The controlled alloy melt after melt purification is introduced into the tundish for heat preservation at 780-820°C, and injected into the continuous semi-so...

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Abstract

The invention relates to the technical field of metal material preparation, and particularly relates to a multi-scale particle modified Al-Mg alloy welding wire and a preparation method thereof. The multi-scale particle modified Al-Mg alloy welding wire comprises an alloy welding wire body, and the alloy welding wire body selects the following main element chemical components according to the particle content percentage: 5.5 to 7.5 percent of Mg, 0.05 to 0.5 percent of Mn, 0.05 to 0.2 percent of Cr, 0 to 1.0 percent of Cu, 0.5 to 3.5 percent of TiB2, 0.5 to 3.5 percent of TiC and the balance of Al and inevitable impurity elements. The Al-Mg alloy welding wire containing submicron TiB2 particles and nanoscale TiC particles prepared according to the method provided by the invention has the advantages that after the welding, a welding seam with a fine equiaxed grain structure and high welding seam strength can be obtained after welding; meanwhile, the extremely low welding crack sensitivity is achieved; and the Al-Mg alloy welding wire can be used for the welding of high-strength and ultrahigh-strength aluminum alloy structural parts.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to an Al-Mg alloy welding wire modified by multi-scale particles and a preparation method thereof. Background technique [0002] Aluminum alloy has good electrical and thermal conductivity, high strength-to-mass ratio, corrosion resistance and damage resistance, and is widely used in aerospace, rail transit, automobiles, ships, pressure vessels, electronic appliances, furniture and many other fields , is one of the most widely used metal materials in industry. Inert gas shielded fusion welding (MIG welding and TIG welding) is a basic way to realize the connection of aluminum alloy structural materials, and it is also the most common connection method used in industrial aluminum alloy materials today. [0003] Ultra-high-strength aluminum alloys are copper-containing 7000-series aluminum alloys (Al-Zn-Mg-Cu alloys), which are one of the main structural materials i...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40C22C1/00C22C1/10C22C21/06C22C32/00
CPCB23K35/286B23K35/40C22C21/06C22C32/0047C22C1/1036C22C1/1073C22C1/12
Inventor 陈继强周子翔钟世标韩双文锋管仁国齐亮
Owner JIANGXI UNIV OF SCI & TECH
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