Meltless preparation of martensitic steel articles having thermophysically melt incompatible alloying elements

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(11)

EP 1 582 604 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	15.07.2009 Bulletin 2009/29

(43)	Date of publication A2:
	05.10.2005 Bulletin 2005/40

(21)	Application number: 05251972.5

(22)	Date of filing: 30.03.2005

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International Patent Classification (IPC):

C22C 33/02^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR LV MK YU

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Priority:

31.03.2004 US 814896

(71)	Applicant: GENERAL ELECTRIC COMPANY
	Schenectady, NY 12345 (US)

(72)	Inventors:
	Shamblen, Clifford Earl Cincinnati Ohio 45242 (US) Woodfield, Andrew Philip Cincinnati Ohio 45243 (US) Ott, Eric Allen Cincinnati Ohio 45241 (US) Gigliotti, Michael Francis Xavier Glenville New York 12302 (US)

(74)	Representative: Goode, Ian Roy et al
	London Patent Operation, General Electric International Inc., 15 John Adam Street London WC2N 6LU London WC2N 6LU (GB)

(54)	Meltless preparation of martensitic steel articles having thermophysically melt incompatible alloying elements

(57) An article of iron base metal base metal alloyed with an alloying element is prepared by mixing (44) a chemically reducible nonmetallic base-metal precursor compound (40) of the iron base metal and a chemically reducible nonmetallic alloying-element precursor compound (42) of an alloying element to form a compound mixture. The alloying element is preferably thermophysically melt incompatible with the iron base metal. The method further includes chemically reducing (48) the compound mixture to a metallic alloy, without melting the metallic alloy, and thereafter consolidating (50) the metallic alloy to produce a martensitic-composition consolidated metallic article, without melting the metallic alloy and without melting the consolidated metallic article.

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