Aluminum alloy heat sinks of heat exchanger and heat exchanger

A technology of heat exchangers and aluminum alloys, which is applied in the field of heat exchangers, can solve problems such as insufficient strength and insufficient strength, and achieve the effects of increased strength, improved reliability, and excellent brazeability

Active Publication Date: 2006-09-13
MITSUBISHI ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat radiating sheet made of the above-mentioned aluminum alloy may not have sufficient strength after brazing, and the strength may be insufficient in the process of thinning the heat radiating sheet.

Method used

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  • Aluminum alloy heat sinks of heat exchanger and heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] The fabricated product contains Si: 0.7%, Mn: 1.7%, Ni: 0.1%, Cu: 0.16%, Mg: 0.012%, Fe: 0.22%, Zn: 2.25%, Zr: 0.1% by weight%, and contains The heat sink of the present invention with the balance of Al and unavoidable impurities.

[0133] As a result of the strength test, the yield point was 59 MPa, and the evaluation was ⊚.

[0134] As a result of the self-corrosion resistance test, the corrosion loss is 14mg / dm 2 , The evaluation is ◎.

[0135] As a result of the solderability (brazing resistance to corrosion) test, the corrosion depth of the solder was 4 μm, and the evaluation was ⓞ.

[0136] In addition, the number of low melting point compounds on the grain boundary is 2×10 2 One.

Embodiment 2

[0138] Produced by weight%, containing Si: 0.7%, Mn: 1.7%, Ni: 0.1%, Cu: 0.16%, Mg: 0.025%, Fe: 0.22%, Zn: 2.25%, Zr: 0.1%, and containing The heat sink of the present invention with the balance of Al and unavoidable impurities.

[0139] As a result of the strength test, the yield point was 59 MPa, and the evaluation was ⊚.

[0140] As a result of the self-corrosion resistance test, the corrosion loss is 15mg / dm 2 , The evaluation is ◎.

[0141] As a result of the solderability (brazing resistance to corrosion) test, the corrosion depth of the brazing filler metal was 5 μm, and the evaluation was ⊚.

[0142] In addition, the number of low melting point compounds on the grain boundary is 2×10 2 One.

Embodiment 3

[0144] The fabricated product contains Si: 0.7%, Mn: 1.7%, Ni: 0.02%, Cu: 0.16%, Mg: 0.02%, Fe: 0.22%, Zn: 2.25%, Zr: 0.1% by weight%, and contains The heat sink of the present invention with the balance of Al and unavoidable impurities.

[0145] As a result of the strength test, the yield point was 51 MPa, and the evaluation was ○.

[0146] As a result of self-corrosion resistance test, the corrosion loss is 6mg / dm 2 , The evaluation is ◎.

[0147] As a result of the solderability (brazing resistance to corrosion) test, the corrosion depth of the solder was 3 μm, and the evaluation was ⊚.

[0148] In addition, the number of low melting point compounds on the grain boundary is 2×10 2 One.

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Abstract

The present invention provides aluminum alloy heat sink with excellent strength performance, solderability and anticorrosion performance for heat exchanger and the heat exchanger. The aluminum alloy for heat sink consists of Si 0.6-1.2 wt%, Mn 1.5-2.5 wt%, Ni 0.01-0.15 wt%, Cu 0.01-0.25 wt%, Mg 0.01-0.03 wt%, Fe not more than 0.5 wt%, Zn 1-5 wt%, and Al and inevitable impurity for the rest. The present invention makes it possible to make thin wall and light heat sink and to provide high reliability of heat sink and heat exchanger.

Description

Technical field [0001] The present invention relates to an aluminum alloy fin material for a heat exchanger used in an aluminum alloy heat exchanger manufactured by a brazing method, and a heat exchanger provided with the fin material. Background technique [0002] In recent years, due to the weight reduction of automobiles, heat exchangers for automobiles are also required to be lighter. In response to this, thinner and higher strength radiating fins are required. [0003] As heat sink materials for heat exchangers, 1000 series or 3000 series aluminum alloys have been used. However, the heat sink material made of the above-mentioned aluminum alloy may not have sufficient strength after brazing, and the strength may be insufficient in the process of thinning the heat sink material. [0004] In order to increase the strength of the brazed heat sink, an aluminum alloy heat sink for heat exchangers composed of an aluminum alloy in which Zn or the like is added to an Al-Mn-Si-Ni syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00F28F21/08
Inventor 岩尾祥平江户正和麻野雅三
Owner MITSUBISHI ALUMINUM CO LTD
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