Non-continuous reinforced aluminium-based composite material tungsten electrode argon-arc welding seam original position reinforcement method

A technology of argon tungsten arc welding and reinforced aluminum base, which is applied in the direction of arc welding equipment, welding/cutting medium/material, welding medium, etc., can solve the problems of far different performance of welded joints and low strength of welded joints, and achieve welding The strength of the joint and the base metal is close, the operation is simple, and the effect of high strength of the welded joint

Active Publication Date: 2008-06-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low strength of welded joints of aluminum-based composite materials, and the performance difference between welded joints and base metals, and to provide an in-situ reinforcement method for discontinuously reinforced aluminum-based composite materials by argon tungsten arc welding

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0006] Embodiment 1: The steps of this embodiment are as follows: 1. Prepare the filler material for the weld; 2. Install an electromagnetic stirring device on the welding torch to stir the molten pool; 3. In the flat welding position, the welding current is 140-170 Ampere pulse current, welding voltage is 16 volts; pure argon or nitrogen-argon mixed gas protection, gas flow rate is 0.5-1.2 cubic meters per hour; welding speed is 180-210 mm / min; 4. Post-welding treatment; Heat the weldment to 510-550°C and keep it warm for 0.7-1.3 hours, then put the weldment in water to cool, then heat it to 150-200°C and keep it warm for 40-55 hours, after the heat preservation is over, air-cool the weldment to room temperature.

specific Embodiment approach 2

[0007] Embodiment 2: The volume percentage of nitrogen-argon mixed gas in step 3 of this embodiment is: 20-50% for nitrogen and 50-80% for argon. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0008] Specific embodiment three: The filler material of the welding seam described in this embodiment is a tubular flux-cored welding wire, the outer diameter of the tubular welding wire is 1.2-1.6 mm, the pipe is made of pure Al, and the flux core is made of the powder of the following components by weight percentage Composition: Si: 8-8.5%, Mg: 0.5-0.8%, Ti: 0.8-1.05, Y (yttrium): 0.3-0.5%, Sc (scandium): 0.2-0.25%, SiCp: 2%, KCl: 0.5 %, LiCl: 0.8%, AlF: 1%, and the balance is Al powder. The tubular flux-cored wire of this embodiment is suitable for welding ZL101A / SiCp / 20p composite materials. The particle size of the powder is 75-180 μm for Φ1.2mm welding wire, and 75-250 μm for Φ1.6mm welding wire. The manufacturing process of the drawn seamed flux-cored welding wire is adopted.

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Abstract

The invention relates to a method for reinforcing aluminum-based composite soldering seam. The invention comprises the following steps: preparing filled composite of soldering seam; equipping electromagnetic agitating device; choosing impulse current of 140-170 ampere as welding current, and 16 volt as welding voltage; choosing pure argon gas or nitrogen-argon mixture gas as shielding gas, and 0.5-1.2 cubic meter / hour as gas flow; welding speed being 180-210 millimeter / minute; post-treating of welds; heating weldment to 510-550deg C and keeping 0.7-1.3 hours; putting weldment into water to get cool; heating to 150-200deg C and keeping 40-55 hours; And cooling the weldment by air cooling to indoor temperature. The invention has advantages of simple operation, high-strength welding joint and close strength between welding joint and base metal.

Description

Technical field: [0001] The invention relates to a strengthening process for welding seams of aluminum-based composite materials. Background technique: [0002] Due to the advantages of high specific strength, specific stiffness, dimensional stability, vibration resistance, high temperature resistance, aging resistance, and cosmic ray resistance, aluminum matrix composites have a wide range of application values ​​in aerospace, aviation, automobile, electronics and other industrial fields. It has become the mainstream of the current development and research of metal matrix composites. The National Natural Science Foundation of China's "Tenth Five-Year Plan Priority Funding Field Demonstration Report Collection" also pointed out: "The use of new materials (such as: composite materials) puts existing manufacturing technologies to the test, and corresponding new manufacturing technologies need to be produced" . At present, a lot of research work has been carried out on the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/08B23K35/28B23K35/32B23K35/36B23K37/00
Inventor 牛济泰
Owner HARBIN INST OF TECH
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