Title:
EXTRUDED PERFORATED ALUMINUM ALLOY TUBE FOR HEAT EXCHANGERS, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2021/251227
Kind Code:
A1
Abstract:
An extruded perforated aluminum alloy tube for heat exchangers, said extruded perforated aluminum alloy tube being characterized by being formed from an aluminum alloy which contains from 0.60% by mass to 1.80% by mass of Mn and from 0.20% by mass to 0.70% by mass of Si, with the balance being made up of Al and unavoidable impurities, wherein the ratio of the Mn content to the Si content, namely Mn/Si is from 2.6 to 4.0, and being also characterized in that the strength change by a three-minute heating test at 600°C ± 10°C ((tensile strength (A) of aluminum alloy after heating test) – (tensile strength (B) of aluminum alloy before heating test)) is -5 MPa or more. Consequently, the present invention is able to provide: an extruded perforated aluminum alloy tube for heat exchangers, said extruded perforated aluminum alloy tube having excellent extrusion properties, while exhibiting high strength after brazing; and a method for producing this extruded perforated aluminum alloy tube for heat exchangers.
Inventors:
SUZUKI TAICHI (JP)
TOMORI RYO (JP)
KUMAGAI HIDETOSHI (JP)
TOMORI RYO (JP)
KUMAGAI HIDETOSHI (JP)
Application Number:
PCT/JP2021/020946
Publication Date:
December 16, 2021
Filing Date:
June 02, 2021
Export Citation:
Assignee:
UACJ CORP (JP)
International Classes:
C22C21/00; C22F1/04; C22F1/00
Domestic Patent References:
| WO2011148781A1 | 2011-12-01 | |||
| WO2009149542A1 | 2009-12-17 |
Foreign References:
| JP2009249727A | 2009-10-29 | |||
| JPH11335764A | 1999-12-07 | |||
| JP2007031730A | 2007-02-08 | |||
| JP2019167581A | 2019-10-03 | |||
| JP2006316294A | 2006-11-24 | |||
| JP2008121108A | 2008-05-29 |
Other References:
See also references of EP 4137597A4
Attorney, Agent or Firm:
ASHITABA INTERNATIONAL PATENT OFFICE (JP)
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