Title:
METHOD FOR PRODUCING EXTRUDED MULTI-HOLE PIPE
Document Type and Number:
WIPO Patent Application WO/2023/068166
Kind Code:
A1
Abstract:
In this method for producing an extruded multi-hole pipe (1), an ingot is produced, which has a chemical composition containing one or more elements from among Si: 2.0 mass% or less, Fe: 0.6 mass% or less, Cu: 0.6 mass% or less, Mn: 2.0 mass% or less, Mg: 0.4 mass% or less, Cr: 0.1 mass% or less, Zn: 1.5 mass% or less, Ti: 0.1 mass% or less and B: 0.1 mass% or less, with the remainder comprising Al and unavoidable impurities, the total content of Si and Mn being 3.2 mass% or less, the Si content being less than the Mn content. After a first homogenisation treatment in which the ingot is kept at a temperature of 550-650°C for 2 or more hours, a second homogenisation treatment is performed in which the ingot is kept at a temperature of 450-540°C for 3 or more hours. The ingot is then hot-extruded.
Inventors:
SUZUKI TAICHI (JP)
TOMORI RYO (JP)
TOMORI RYO (JP)
Application Number:
PCT/JP2022/038245
Publication Date:
April 27, 2023
Filing Date:
October 13, 2022
Export Citation:
Assignee:
UACJ CORP (JP)
International Classes:
B21C25/02; C22C21/00; C22F1/00; C22F1/04; F28D1/053; F28F1/02; F28F21/08
Foreign References:
| JP2007031730A | 2007-02-08 | |||
| JPH1161312A | 1999-03-05 | |||
| JP2011247459A | 2011-12-08 | |||
| JP2013204070A | 2013-10-07 | |||
| JP2009046702A | 2009-03-05 |
Attorney, Agent or Firm:
AICHI, TAKAHASHI, IWAKURA & ASSOCIATES (JP)
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