(19)
(11) EP 1 438 441 A1

(12)

(43) Date of publication:
21.07.2004 Bulletin 2004/30

(21) Application number: 02772392.3

(22) Date of filing: 23.10.2002
(51) International Patent Classification (IPC)7: C22F 1/10, C22C 19/05
(86) International application number:
PCT/EP2002/011856
(87) International publication number:
WO 2004/038056 (06.05.2004 Gazette 2004/19)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(71) Applicants:
  • Siemens Aktiengesellschaft
    80333 München (DE)
  • Howmet Research Company
    Whitehall, MI 49461 (US)

(72) Inventors:
  • ESSER, Winfried
    44805 Bochum (DE)
  • GOLDSCHMIDT, Dirk
    47445 Moers (DE)
  • OTT, Michael
    45478 Mülheim a.d.R. (DE)
  • PAUL, Uwe
    40882 Ratingen (DE)
  • PICKERT, Ursula
    45470 Mülheim a.d.R. (DE)
  • VOGT, Russel, G.
    Yorktown, VA 23692 (US)
  • HANSLITS, Christopher, R.
    Zuni, VA 23898 (US)

   


(54) HEAT TREATMENT OF ALLOYS HAVING ELEMENTS FOR IMPROVING GRAIN BOUNDARY STRENGTH