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Composite brazing aluminum sheet/foil core material alloy for intercooler and preparation method of core material alloy

A technology for brazing aluminum plate and aluminum alloy plate, applied in the field of core material alloy and its preparation, can solve the problems of reducing the working performance of the intercooler, reducing the supporting strength of the core material, increasing the creep of the aluminum alloy, etc. Sagging resistance, effect of increasing recrystallized structure

Active Publication Date: 2014-05-07
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the brazing process, the molten cladding layer will erode the core material layer, reduce the support strength of the core material, and cause the overall collapse of the intercooler or the phenomenon of virtual welding and desoldering; in addition, the high temperature environment will aggravate the creep of the aluminum alloy. change, further reducing the performance of the intercooler

Method used

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  • Composite brazing aluminum sheet/foil core material alloy for intercooler and preparation method of core material alloy

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] First, 1750 grams of industrial pure aluminum ingots, 52 grams of aluminum-iron alloys, 22 grams of aluminum-silicon alloys, 180 grams of aluminum-manganese alloys, 50 grams of aluminum-copper alloys, 50 grams of aluminum-zirconium alloy ingredients and 3 grams of industrial pure magnesium ingots were used for melting. The temperature is 720°C, the alloy is melted and stirred for 3 minutes, purified, and left to stand for 5 to 10 minutes to clean the aluminum slag on the surface of the molten aluminum. Next, add 100 grams of aluminum-ytterbium alloy to the molten aluminum, stir for 2 minutes, let stand for 3 to 5 minutes, take a sample, and use direct-reading spectroscopy to analyze the weight percentages of each alloy element in the molten aluminum: iron 0.24%, 0.2% silicon, 0.80% manganese, 0.21% copper, 0.10% magnesium, 0.20% zirconium, 0.12% ytterbium, and the rest is aluminum; then cast it into a 20mm thick aluminum alloy plate. Finally, the obtained core material ...

Embodiment 2

[0021] First, 1855 grams of industrial pure aluminum ingots, 5 grams of industrial pure magnesium ingots, 80 grams of aluminum-iron alloys, 25 grams of aluminum-silicon alloys, 355 grams of aluminum-manganese alloys, 50 grams of aluminum-copper alloys, and 25 grams of aluminum-zirconium alloys were used for melting. The temperature is 710°C, after the alloy is melted, add 0.1% refining agent by weight of molten aluminum (the refining agent is composed of 15% sodium chloride, 30% potassium chloride, 5% hexachloromethane, 3% potassium fluoroborate, 12 % sodium fluoroaluminate mixed with 10% charcoal powder, which can degas and clean the aluminum melt), the aluminum melt is stirred by blowing nitrogen gas, and purified, after stirring for 3 minutes, Let it stand for 10 minutes to clean up the aluminum slag on the surface of the molten aluminum. Then add 110 grams of aluminum-ytterbium alloy to the aluminum liquid, and stir the aluminum melt by blowing inert gas. After stirring fo...

Embodiment 3

[0025] First, 1770 grams of industrial pure aluminum ingots, 4 grams of industrial pure magnesium ingots, 110 grams of aluminum-iron alloys, 32 grams of aluminum-silicon alloys, 250 grams of aluminum-manganese alloys, 125 grams of aluminum-copper alloys, and 28 grams of aluminum-zirconium alloys were used for melting. The temperature is 735°C, after the alloy is melted, add 0.5% refining agent by weight of molten aluminum (the refining agent is composed of 25% sodium chloride, 40% potassium chloride, 12% hexachloromethane, 7% potassium fluoroborate, 16 % sodium fluoroaluminate mixed with 20% charcoal powder), the aluminum melt is stirred by blowing nitrogen or inert gas for purification treatment, after stirring for 3 minutes, it is left to stand for 10 minutes to clean the aluminum surface scum. Next, add 50 grams of aluminum-ytterbium alloy to the aluminum liquid, stir the aluminum melt by blowing nitrogen or inert gas, after stirring for 2 minutes, after standing for 5 minu...

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Abstract

The invention discloses a composite brazing aluminum sheet / foil core material alloy for an intercooler and a preparation method of the core material alloy. The core material alloy consists of the following components in percentage by weight: 0.12-0.46% of iron, 0.01-0.25% of silicon, 0.45-1.4% of manganese, 0.04-0.5% of copper, 0.1-0.21% of magnesium, 0.05-0.2% of zirconium, 0.01-0.4% of ytterbium and the balance of aluminum. The preparation method of the core material alloy mainly comprises the steps of 1. smelting, stirring, purifying and keeping all alloys except for aluminum-ytterbium alloy; 2. adding aluminum-ytterbium alloy, stirring, standing by, and casting molten aluminum into a core material aluminum alloy sheet; and 3. homogenizing the core material aluminum alloy sheet, preserving heat, discharging the core material aluminum alloy sheet out of furnace, air-cooling, and implementing surface treatment. The core material alloy disclosed by the invention has the advantages of being effective to inhibit erosion of molten solder and obvious to improve high-temperature creep performance of aluminum alloy; and the method disclosed by the invention is simple and easy to implement, and applicable to industrial production.

Description

technical field [0001] The invention relates to a core material alloy and a preparation method thereof, in particular to a composite brazing aluminum plate / foil core material alloy for an intercooler and a preparation method thereof. Background technique [0002] Supercharging and intercooling technology is an effective way to increase engine power, reduce fuel consumption, and reduce emission pollution, and it is an inevitable direction for the development of automobile engines. With the development of high power density engines, the temperature of the charge air has been significantly increased, while the space in the engine compartment has become increasingly crowded, restricting the air flow, which is not conducive to better heat dissipation of the intercooler, resulting in the working temperature of the aluminum intercooler exceeding 200 °C , which puts forward higher requirements for the high-temperature durability of the aluminum intercooler. [0003] Composite brazi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03
Inventor 涂益友孙中岳张平张敏达张建军彭晓彤吴永新蒋建清
Owner SOUTHEAST UNIV
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