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Aluminum alloy fin material for heat exchanger for combined stamping and manufacturing method thereof

A technology for heat exchangers and manufacturing methods, which is applied to the field of aluminum alloy fin materials for heat exchangers for combined stamping, can solve problems such as difficult forming, and achieve excellent effects of preventing appearance and ring crack resistance

Active Publication Date: 2016-02-10
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these formings are extremely difficult for fin materials whose thickness is reduced to 0.15 mm or less.

Method used

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  • Aluminum alloy fin material for heat exchanger for combined stamping and manufacturing method thereof
  • Aluminum alloy fin material for heat exchanger for combined stamping and manufacturing method thereof
  • Aluminum alloy fin material for heat exchanger for combined stamping and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment No22～27

[0098] (Example No.22-27, Comparative Example No.28-35)

[0099] The aluminum alloys shown in Table 2 (alloys A, B, and C corresponding to Table 1) were melted and cast to form ingots, and the ingots were subjected to surface processing, followed by homogenization heat treatment and hot rolling to obtain A hot-rolled sheet with a thickness of 3.0 mm. In addition, except for No. 35, cold rolling was performed at a cold working rate of about 97.0% or 97.3% to form a plate thickness of 90 μm and 80 μm, and then temper annealing was performed to form a fin material. In No. 35, intermediate annealing was performed at 360° C. for 3 hours using a batch furnace after cold-rolling a hot-rolled sheet with a plate thickness of 3.0 mm at a cold working rate of 50%. Then, cold rolling was performed at a cold working ratio of about 94.0% or 94.7% respectively to form a sheet thickness of 90 μm and 80 μm, and then temper annealing was performed to form a fin material. Table 2 shows the hom...

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Abstract

An aluminium alloy fin material serves as a combination-pressable heat-changing fin material and exhibits excellent collar-cracking resistance as to less suffer from the occurrence of collar cracking during a forming process. The fin material is formed from an aluminium alloy. The aluminum alloy contains 0.010% to 0.4% in mass of Fe, with the remainder including Al and unavoidable impurities, and has an Al purity of 99.30% in mass or more. The fin material has a thickness of less than 0.115 mm and has an average subgrain size of 2.5 µm or less and a yield strength of 100 to 130 newtons per square millimeter. A number density of intermetallic compounds having a maximum length of greater than 3 µm in the fin material is not more than 2000 per square millimeter.

Description

technical field [0001] The present invention relates to an aluminum alloy fin material for a heat exchanger used in combined stamping and a manufacturing method thereof. Background technique [0002] In recent years, in aluminum alloy fin materials for heat exchangers (hereinafter appropriately referred to as fin materials) used in heat exchangers such as air conditioners, new refrigerants have been replaced and used due to compliance with the halon limit value, the compactness of air conditioners themselves, Lightweight or high performance, etc., and increasingly seek thinning, thinning to a plate thickness of 0.15mm or less, and has recently reached about 0.09mm. [0003] Here, the forming method of the fin material includes a stretching method, a thinning stretching method, and a stretching and thinning stretching composite method (combined method). The stretching method consists of a bulging process, a deep drawing process, a punching (perforation) and a hole expansion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22F1/04F28F21/08C22F1/00
CPCC22C21/00C22F1/00C22F1/04F28F21/084
Inventor 金田大辅梅田秀俊
Owner KOBE STEEL LTD