EP 1466993 A1 20041013 - Heat resisting steel, gas turbine using the steel, and components thereof
Title (en)
Heat resisting steel, gas turbine using the steel, and components thereof
Title (de)
Wärmebeständiger Stahl sowie daraus hergestellte Gasturbine und Bauteile
Title (fr)
Acier résistant à la chaleur et turbine à gaz et composants réalisées en cet acier
Publication
Application
Priority
JP 2003101401 A 20030404
Abstract (en)
The invention is of a heat resisting martensitic steel comprising, by weight, 0.05 to 0.30% C, not more than 0.50% Si, not more than 0.60% Mn, 8.0 to 13.0% Cr, 0.5 to 3.0% Ni, 1.0 to 3.0% Mo, 0.1 to 1.5% W, 0.5 to 4% Co, 0.05 to 0.35% V, 0.02 to 0.30% in total of one or two elements selected from the group consisting of Nb and Ta, and 0.02 to 0.10% N, wherein a value of the square of a difference between the Ni amount and the Co amount, and the Ni amount are not more than values determined by a straight line drawn on a point A (1.0, 2.7%) and a point B (2.5, 1.0%) in the orthogonal coordinates shown in the attached drawing of Fig. 2 which represents a relationship between the above square value and the Ni amount, and an amount ratio of Mo/(Mo + 0.5W) is not less than 0.5. The heat resisting steel is suitably used in various components of a gas turbine.
IPC 1-7
IPC 8 full level
F01D 5/06 (2006.01); C22C 38/00 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01); F01D 5/28 (2006.01); F02C 7/00 (2006.01)
CPC (source: EP US)
C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US); C22C 38/54 (2013.01 - EP US)
Citation (search report)
- [A] EP 0770696 A1 19970502 - MITSUBISHI HEAVY IND LTD [JP]
- [A] EP 0867523 A1 19980930 - MITSUBISHI HEAVY IND LTD [JP]
- [DA] EP 0691416 A1 19960110 - JAPAN STEEL WORKS LTD [JP], et al
- [DA] EP 0688883 A1 19951227 - NIPPON STEEL CORP [JP], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30)
- [A] SPIEKERMANN P: "LEGIERUNGEN - EIN BESONDERES PATENTRECHTLICHES PROBLEM? - LEGIERUNGSPRUEFUNG IM EUROPAEISCHEN PATENTAMT -", MITTEILUNGEN DER DEUTSCHEN PATENTANWAELTE, HEYMANN, KOLN,, DE, 1993, pages 178 - 190, XP000961882, ISSN: 0026-6884 & SPIEKERMANN P: "Alloys - a special problem of patent law", 1993, NONPUBLISHED ENGLISH TRANSLATION OF DOCUMENT ABOVE, XP002184689
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 1466993 A1 20041013; EP 1466993 B1 20070418; DE 602004005910 D1 20070531; DE 602004005910 T2 20071206; JP 2004307910 A 20041104; JP 3921574 B2 20070530; US 2005074356 A1 20050407; US 2009068052 A1 20090312
DOCDB simple family (application)
EP 04001026 A 20040119; DE 602004005910 T 20040119; JP 2003101401 A 20030404; US 15355208 A 20080521; US 75784704 A 20040116