Global Patent Index - EP 0568705 A4

EP 0568705 A4 19951129 - METHOD FOR DEGASSING AND SOLIDIFYING ALUMINUM ALLOY POWDER

Title (en)

METHOD FOR DEGASSING AND SOLIDIFYING ALUMINUM ALLOY POWDER

Publication

EP 0568705 A4 19951129 (EN)

Application

EP 92923997 A 19921120

Priority

  • JP 9201527 W 19921120
  • JP 4769592 A 19920204
  • JP 30787391 A 19911122

Abstract (en)

[origin: WO9309899A1] A method for degassing and solidifying aluminum alloy powder is mprovided that can eliminate drawbacks inherent in a conventional method by making induction heating available for degassing means during processes of forming and solidifying aluminum powder and aluminum alloy powder. The method comprises the steps of pre-forming aluminum powder, aluminum alloy powder, aluminum composite alloy powder or powder mixtures of these powders and non-ferrous metal particles to a specific resistance of 0.2 $g(V) cm or lower, removing heat decomposable evaporation components by directly induction heating the pre-formed body in the normal pressure atmosphere so as to raise the temperature thereof to 400 C to 600 C while maintaining a temperature rise gradient over 300 C at 0.4 C/scm or higher, and reducing the hydrogen content to less than 10 ppm.

IPC 1-7

B22F 1/00; B22F 3/02

IPC 8 full level

B22F 1/12 (2022.01); B22F 1/142 (2022.01); B22F 3/02 (2006.01); B22F 3/10 (2006.01); B22F 3/105 (2006.01); B22F 3/14 (2006.01); B22F 3/17 (2006.01); B22F 3/24 (2006.01); C21D 1/42 (2006.01); C22C 1/04 (2006.01); C22C 21/02 (2006.01); C22F 1/00 (2006.01); C22F 1/04 (2006.01)

CPC (source: EP KR US)

B22F 1/12 (2022.01 - EP KR US); B22F 1/142 (2022.01 - EP KR US); B22F 3/02 (2013.01 - KR); B22F 3/1017 (2013.01 - EP US); B22F 3/1028 (2013.01 - EP); B22F 3/105 (2013.01 - EP US); B22F 3/24 (2013.01 - EP)

Citation (search report)

  • [AD] US 4435213 A 19840306 - HILDEMAN GREGORY J [US], et al
  • [A] DATABASE WPI Section Ch Week 8920, Derwent World Patents Index; Class M22, AN 89-148936
  • [A] PATENT ABSTRACTS OF JAPAN vol. 011, no. 141 (C - 421) 8 May 1987 (1987-05-08)
  • See references of WO 9309899A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

WO 9309899 A1 19930527; DE 69225469 D1 19980618; DE 69225469 T2 19980924; EP 0568705 A1 19931110; EP 0568705 A4 19951129; EP 0568705 B1 19980513; JP 3336645 B2 20021021; JP H05320709 A 19931203; KR 930703101 A 19931129; KR 960007499 B1 19960605

DOCDB simple family (application)

JP 9201527 W 19921120; DE 69225469 T 19921120; EP 92923997 A 19921120; JP 33390192 A 19921120; KR 930702170 A 19930722