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Al-Si-Cu-Mg aluminum-base alloy foil solder and preparation method thereof

An al-si-cu-mg, aluminum-based alloy technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of severe softening of welded joints, easy overburning of the base metal, excessive dissolution of the base metal, etc. Achieve the effects of mass production, good brazing processability, and good wettability

Active Publication Date: 2014-02-12
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum alloy vacuum brazing generally uses AlSiMg alloy solder, and the brazing temperature is generally 600 ° C ~ 615 ° C. When used for vacuum brazing of 2A50, 6061 and other heat-treatable aluminum alloys, the base metal is easy to overburn, and the welded joint softens after welding. Seriously, the strength coefficient is reduced, and it is easy to cause excessive dissolution of the base metal, resulting in dissolution defects, and the welding quality of the product cannot be guaranteed

Method used

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  • Al-Si-Cu-Mg aluminum-base alloy foil solder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The furnace capacity of the intermediate frequency induction furnace during alloy casting is 80kg

[0063] First prepare Al-Cu50 and Al-Si30 master alloys with raw materials, prepare 7.2kg of Al-Cu50 and 33.3kg of Al-Si30 from the prepared master alloy raw materials, mix the two master alloys, and then add 38.3kg of aluminum, 1.2 kg of magnesium is smelted, and the obtained alloy ingot contains 4.5wt% Cu, 12.5wt% Si, and 1.5wt% Mg, then undergoes homogenization heat treatment, and finally performs hot extrusion, hot billet rolling and cold rolling.

Embodiment 2

[0065] The furnace capacity of the intermediate frequency induction furnace during alloy casting is 100kg

[0066] First prepare Al-Cu50 and Al-Si30 master alloys with raw materials, prepare 8kg of Al-Cu50 and 41.7kg of Al-Si30 from the prepared master alloy raw materials, mix the two master alloys, and then add 48.8kg of aluminum, 1.5kg of Magnesium is smelted to obtain an alloy ingot containing Cu4.0wt%, Si12.5wt%, Mg1.5wt%, then homogenized heat treatment, and finally hot extrusion, hot billet rolling and cold rolling.

Embodiment 3

[0068] The furnace capacity of the intermediate frequency induction furnace during alloy casting is 120kg

[0069] First prepare Al-Cu50 and Al-Si30 master alloys with raw materials, prepare 9.6kg of Al-Cu50 and 48.0kg of Al-Si30 from the prepared master alloy raw materials, mix the two master alloys, and then add 60.6kg of aluminum, 1.8 kg of magnesium is smelted, and the obtained alloy ingot containing Cu4.0wt%, Si12.0wt%, and Mg1.5wt%, is subjected to homogenization heat treatment, and finally hot extrusion, hot billet rolling and cold rolling.

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Abstract

Al-Si-Cu-Mg aluminum-base alloy foil solder and a preparation method thereof are mainly applied to vacuum soldering of aluminum alloy. The solder is made with 10.5-13.5wt% of Si, 3.5-5.5wt% of Cu, 1.0-2.2wt% of Mg, and the balance of Al. The solder is low in melting temperature, good in soldering efficiency, good in wetting property, higher than 85% in welding area ratio, not smaller than 100MPa in weld tensile strength alpha b, not smaller than 50MPa in shear strength tau, and applicable to medium-temperature or graded vacuum soldering of various aluminum alloys such as 3A21, 2A50, 6063 and 6061. The preparation method includes: preparation of materials, preparation of intermediate alloy, alloy casting, heat treatment, hot extrusion, rolling and the like. The preparation method is simple and is convenient for batch production. The foil solder 0.10mm in thickness and 320mm in width prepared by the method is better applicable to vacuum soldering of large-sized aluminum alloy components.

Description

technical field [0001] The invention relates to an Al-Si-Cu-Mg aluminum-based alloy state foil-shaped solder and a preparation method thereof, which is mainly used for vacuum brazing of aluminum alloys and belongs to the technical field of metallurgy and rolling processing. Background technique [0002] Aluminum and aluminum alloys have excellent mechanical properties, low density, high specific strength, high electrical and thermal conductivity, and strong corrosion resistance. They have been widely used in aerospace, aviation, construction, electrical appliances, automobiles, and ships. Therefore, aluminum The joining of alloys and their processing technology play a very important role in product manufacturing. There are many ways to connect aluminum alloys, and brazing is a very important one. Due to the characteristics of beautiful brazing seams and small welding deformation, it is widely used in aviation, aerospace, electronic power, shipbuilding and other industries, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/288B23K35/40
Inventor 张国清祁宇唐超杜旭明
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH
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