Title:
ALUMINUM ALLOY EXTRUDED TUBE AND HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2023/021915
Kind Code:
A1
Abstract:
Provided is an aluminum alloy extruded tube for a heat exchanger, characterized by having a tube body composed of an Mn-containing aluminum alloy and a coating film formed on the surface of the tube body, and the coating film being such that the coating amount of an Al-Si alloy brazing material powder is 9.0-25.0 g/m2, the coating amount of a Zn-containing fluoride-based flux powder is 1.0-9.0 g/m2, the coating amount of a Zn-free fluoride-based flux powder is 1.0-11.0 g/m2, and the coating amount of a binder is 1.0-13.0 g/m2, By using the present invention, it is possible to provide: an extruded tube that is to be used in a heat exchanger for an automobile, the extruded tube being joined to fins without any reduction in the wall thickness of the tube or with extremely little reduction in said wall thickness, having excellent brazing capabilities, having exceptional corrosion resistance, and being such that the fins do not readily fall out for a long period of time; and a heat exchanger in which said extruded tube is used.
Inventors:
TOMORI RYO (JP)
SUZUKI TAICHI (JP)
SUZUKI TAICHI (JP)
Application Number:
PCT/JP2022/028315
Publication Date:
February 23, 2023
Filing Date:
July 21, 2022
Export Citation:
Assignee:
UACJ CORP (JP)
International Classes:
B23K1/19; B23K1/00; B23K35/28; C22C21/00; C22F1/00; C22F1/04; F28F19/06; F28F21/08
Domestic Patent References:
| WO2011148781A1 | 2011-12-01 |
Foreign References:
| JP4980787B2 | 2012-07-18 | |||
| JP2011007383A | 2011-01-13 | |||
| JP2006348358A | 2006-12-28 | |||
| JP5834624B2 | 2015-12-24 |
Attorney, Agent or Firm:
ASHITABA INTERNATIONAL PATENT OFFICE (JP)
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