SAL8090 aluminum-lithium alloy TIG (Tungsten Inert Gas)/MIG (Metal-Inert Gas) solder wire and preparation method thereof

A 1. SAL8090, aluminum-lithium alloy technology, applied in welding equipment, metal processing equipment, welding medium, etc., can solve the problems of easy oxidation of lithium, high lithium burning rate, low production efficiency, etc., to improve the eutectic distribution Morphology, dispersion-strengthened lattice structure, and effects of improved mechanical properties

Active Publication Date: 2011-08-10
LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the traditional SAL8090 aluminum-lithium alloy TIG / MIG welding wire is easily oxidized during the preparation process, and the burning rate of lithium is high. Fracture, low production efficiency, serious environmental pollution, poor mechanical properties of the prepared welding wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of SAL8090 aluminum-lithium alloy TIG / MIG welding wire, described welding wire adopts Al-Li-Mg-Cu-Zr-Sr alloy system, and the weight percent content of each component during manufacture is: Li 2.58%, Mg 1.07%, Cu 1.1%, Zr 0.11%, Sr 0.15%, and the rest is Al.

[0027] Prepare according to the following steps:

[0028] a. Melting Li, Mg, Cu, Zr, Sr and Al in a vacuum induction furnace with a melting temperature of 650°C and a vacuum of 1.35×10 －3 Pa, cast ingot under the protection of argon gas after smelting, the flow rate of argon gas is 8ml / s;

[0029] b. After removing the sundries on the surface of the ingot and at both ends, the alloy wire rod is obtained by continuous extrusion at a temperature of 500°C;

[0030] c. After the alloy wire rod is subjected to rough, medium and fine wire drawing, it is scraped and cleaned with a rotary triangular hole scraper to obtain the welding wire.

Embodiment 2

[0032] A kind of SAL8090 aluminum-lithium alloy TIG / MIG welding wire, described welding wire adopts Al-Li-Mg-Cu-Zr-Sr alloy system, and the weight percent content of each component during manufacture is: Li 2.5%, Mg 1.5%, Cu 2.0%, Zr 0.1%, Sr 0.2%, and the rest is Al.

[0033] Prepared according to the method described in Example 1, wherein the melting temperature is 630 ° C, and the vacuum degree is 1 × 10 －3 Pa, the argon flow rate is 10ml / s, and continuous extrusion is performed at a temperature of 525°C.

Embodiment 3

[0035] A kind of SAL8090 aluminum-lithium alloy TIG / MIG welding wire, described welding wire adopts Al-Li-Mg-Cu-Zr-Sr alloy system, and the weight percent content of each component during manufacture is: Li 3.5%, Mg 0.5%, Cu 1.0%, Zr 0.25%, Sr 0.1%, and the rest is Al.

[0036] Prepared by the method described in Example 1, wherein the melting temperature is 660 ° C, and the vacuum is 2 × 10 －3 Pa, the argon flow rate is 9ml / s, and continuous extrusion is performed at a temperature of 550°C.

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Abstract

The invention discloses an SAL8090 aluminum-lithium alloy TIG (Tungsten Inert Gas)/MIG (Metal-Inert Gas) solder wire and a preparation method thereof. Raw materials used in preparation comprise the following components in percentage by weight: 2.5-3.5% of Li, 0.5-1.5% of Mg, 1.0-2.0% of Cu, 0.1-0.25% of Zr, 0.1-0.2% of Sr and the balance of Al. The preparation method of the SAL8090 aluminum-lithium alloy TIG/MIG solder wire comprises the following steps of: a. smelting the mixed raw materials in a vacuum induction furnace, and then casting under the protection of argon gas; b. continuously squeezing to prepare an alloy steel wire rod; and c. carrying out rough, moderate and fine wire drawing operation on the alloy steel wire rod, and then scraping and cleaning to obtain the solder wire. The aluminum-lithium alloy TIG/MIG solder wire prepared by using the method disclosed by the invention has low burning rate and good mechanical property and is not easy to fracture.

Description

technical field [0001] The invention relates to a novel aluminum-lithium alloy welding wire and a preparation method thereof, belonging to the field of preparation, processing and molding of non-ferrous metal materials within the category of metal materials within the scope of new materials. Background technique [0002] Lithium is the lightest metal in nature, with a density of 0.534g / cm3 and a melting point of 186°C. Adding metal element lithium to aluminum can greatly increase the elastic modulus of the alloy while reducing the total density. Studies have shown that adding 1% lithium in aluminum alloy can reduce the metal density by 3% and increase the elastic modulus by 6%. Replacing conventional aluminum alloys with aluminum-lithium alloys can reduce the weight of the structure by 10% to 20%, and increase the rigidity by 15% to 20%. Therefore, Al-Li alloys with low density, high elastic modulus, high specific strength and high specific stiffness have broad application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
Inventor 傅开武何成旦
Owner LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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