Global Patent Index - EP 1466993 B1

EP 1466993 B1 20070418 - 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

EP 1466993 B1 20070418 (EN)

Application

EP 04001026 A 20040119

Priority

JP 2003101401 A 20030404

Abstract (en)

[origin: EP1466993A1] 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 8 full level

C22C 38/44 (2006.01); F01D 5/06 (2006.01); C22C 38/00 (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)

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