Title:
ALUMINUM ALLOY TUBE SHAPED HOLLOW MATERIAL, AND TUBE MATERIAL FOR HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2018/225552
Kind Code:
A1
Abstract:
An aluminum alloy tube shaped hollow material, which is fabricated by porthole extrusion, is characterized in that: the aluminum alloy tube shaped hollow material is formed from an Al-Mg based alloy that includes 0.7% by mass or more to less than 2.5% by mass Mg and greater than 0% by mass and 0.15% by mass or less Ti with the remainder being formed from Al and inevitable impurities; the work hardening exponent n value is 0.25 or greater and less than 0.43; the aluminum alloy tube shaped hollow material has an inside surface having a convex structure; and in a cross-section perpendicular to the direction of elongation of the aluminum alloy tube shaped hollow material, the area ratio of the inside surface convex structure is 1 – 30%. The present invention makes it possible to provide an aluminum alloy tube shaped hollow material of 5000 series aluminum alloy fabricated by porthole extrusion and having superior bendability.
Inventors:
SUZUKI TAICHI (JP)
YAMASHITA NAOKI (JP)
YAMASHITA NAOKI (JP)
Application Number:
PCT/JP2018/020282
Publication Date:
December 13, 2018
Filing Date:
May 28, 2018
Export Citation:
Assignee:
UACJ CORP (JP)
UACJ EXTRUSION CORP (JP)
UACJ EXTRUSION CORP (JP)
International Classes:
C22C21/06; C22C21/00; F28F21/08
Domestic Patent References:
| WO2016159361A1 | 2016-10-06 | |||
| WO2016159361A1 | 2016-10-06 |
Foreign References:
| JP2003226928A | 2003-08-15 | |||
| JPS61194145A | 1986-08-28 | |||
| JP2002363677A | 2002-12-18 | |||
| JP2003226928A | 2003-08-15 |
Other References:
See also references of EP 3636786A4
Attorney, Agent or Firm:
ASHITABA INTERNATIONAL PATENT OFFICE (JP)
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