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Corrosion-resistant aluminum brazing composite plate and preparation method thereof

A technology of aluminum brazing and composite boards, which is applied in chemical instruments and methods, metal processing equipment, transportation and packaging, etc., can solve problems such as general corrosion resistance, decreased bond strength, and decreased strength of aluminum brazed composite boards. Achieve excellent corrosion resistance, inhibit corrosion resistance reduction, and improve mechanical properties

Pending Publication Date: 2022-07-22
WUXI JINYANG ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of this type of alloy increases the rolling between the layers, which will reduce the bonding strength between the layers, resulting in a decrease in the strength of the aluminum brazing composite plate. Limited application under harsh conditions of use

Method used

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  • Corrosion-resistant aluminum brazing composite plate and preparation method thereof

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preparation example Construction

[0028] Preparation of titanium-based graphene: grind and mix graphene, potassium fluorotitanate, and 1100 aluminum alloy powder in a mass ratio of 5:1:2, transfer it to a high-temperature furnace, and heat treatment at a temperature of 850 °C for 1 hour under nitrogen. Titanium-based graphene is obtained.

[0029] The preparation method of zinc-based graphene is as follows: taking graphene and zinc nitrate with a mass ratio of 5:1; dispersing graphene in an aqueous solution to form 10wt%, adding 10wt% zinc nitrate solution and mixing evenly, freeze-drying, and transferring to In a high temperature furnace, under the mixed gas of 5% hydrogen and 95% nitrogen, the temperature is set at 700° C. for heat treatment for 2 hours to obtain zinc-based graphene.

Embodiment 1

[0031] Step 1: The Al-Cu-Mg-Mn core alloy ingot and the 4343 cladding alloy ingot are respectively cut, milled, and homogenized at 520° C. for 1 hour; the core layer alloy and the cladding alloy are obtained;

[0032] Step 2: (1) Mix evenly zinc-based graphene and titanium-based graphene with a mass ratio of 10:1 to obtain metallized graphene; place 3 parts of metallized graphene and 100 parts of 1100 aluminum alloy powder in a grinding jar , in the ball-to-material ratio of 10:1, set the rotating speed to 150rmp, intermittent ball milling for 2.5 hours, every 10 minutes, pause for 30 minutes; obtain graphene mixture. (2) Set the process parameters as follows: the laser power is 18W, the scanning speed is 2000mm / s, the spot diameter is 50μm, the number of scans is 2 times, and the scanning line spacing is 40μm; laser etching is performed on the surface of the core alloy; the spraying process is set The parameters are: the pressure is 2MPa, the temperature is 200℃, the powder f...

Embodiment 2

[0035] Step 1: The Al-Cu-Mg-Mn core layer alloy ingot and the 4343 cladding alloy ingot are respectively cut, milled, and homogenized at 500° C. for 1 hour; the core layer alloy and the cladding alloy are obtained;

[0036]Step 2: (1) Mix evenly the zinc-based graphene and titanium-based graphene with a mass ratio of 9:1 to obtain metallized graphene; place 2 parts of metallized graphene and 99 parts of 1100 aluminum alloy powder in a grinding jar In the 10:1 ball-to-material ratio, the rotational speed is set to 150 rpm, and the intermittent ball milling is performed for 2 hours, and every 10 minutes, pauses for 30 minutes; the graphene mixture is obtained. (2) Set the process parameters as follows: the laser power is 15W, the scanning speed is 2000mm / s, the spot diameter is 50μm, the number of scans is 3 times, and the scanning line spacing is 40μm; laser etching is performed on the surface of the core alloy; the spraying process is set The parameters are: the pressure is 1M...

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Abstract

The invention discloses a corrosion-resistant aluminum brazing composite plate and a preparation method thereof. The preparation method of the corrosion-resistant aluminum brazing composite plate comprises the following steps: step 1, cutting, milling and homogenizing a core layer alloy ingot and a cladding layer alloy ingot respectively; core layer alloy and cladding layer alloy are obtained; 2, the surface of the core alloy is subjected to laser etching, graphene mixture spraying and laser cladding, and a barrier layer is generated on the surface; core layer alloy A is obtained; 3, sequentially overlapping the cladding alloy, the core alloy A and the cladding alloy, and carrying out hot rolling and primary annealing; cold rolling and secondary annealing; and performing air cooling to obtain the corrosion-resistant aluminum brazing composite plate. According to the scheme, by arranging the barrier layer containing the metalized graphene, the interface performance and corrosion resistance of the aluminum brazing composite plate are improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy plates, in particular to a corrosion-resistant aluminum brazing composite plate and a preparation method thereof. Background technique [0002] Aluminum alloy sheets are widely used in automobile, aerospace, construction and other fields due to their good mechanical properties and machinability. Among them, the aluminum brazing plate is a composite aluminum alloy plate including a core layer and a cladding layer, usually with 3××× aluminum alloy as the core layer and 4××× aluminum alloy as the cladding (brazing material) composite Obtained, is widely used in heat exchange systems. [0003] In the prior art, 3003 is most commonly used as the core layer, and 4004 is used as the cladding layer to obtain an aluminum brazing sheet, which has low strength and short service life; Performance and corrosion resistance are further reduced. However, due to the expansion of the application range of ...

Claims

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Application Information

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IPC IPC(8): B32B15/01B32B15/20B32B33/00B32B37/06B32B37/10B32B38/00C21D8/02C22C21/16C23C24/10C22F1/057C23F4/00B22F1/12B22F1/14C22F1/043
CPCB32B15/016B32B33/00B32B37/06B32B37/10B32B38/0036C21D8/0247C21D8/0226C21D8/0236C22C21/14C22C21/16C23C24/103C22F1/057C23F4/00C22F1/043B32B2038/0048B32B2255/06B32B2255/20B32B2307/50B32B2307/714
Inventor 丁笑然丁得锋
Owner WUXI JINYANG ALUMINUM IND
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