EP 0896071 A4 20010620 - STEAM TURBINE ROTOR MATERIALS FOR HIGH-TEMPERATURE USE

Title (en)

STEAM TURBINE ROTOR MATERIALS FOR HIGH-TEMPERATURE USE

Title (de)

DAMPFTURBINEROTORMATERIALEN FÜR HOCHTEMPERATUR BENUTZUNG

Title (fr)

MATERIAUX POUR ROUE DE TURBINE A VAPEUR, DESTINES A ETRE UTILISES A DES TEMPERATURES ELEVEES

Publication

EP 0896071 A4 20010620 (EN)

Application

EP 97947913 A 19971212

Priority

JP 9704580 W 19971212
JP 136097 A 19970108
JP 22324397 A 19970820

Abstract (en)

[origin: WO9830727A1] (1) A steam turbine rotor material for high-temperature use which comprises 0.05 to 0.13 wt.% carbon, 0.01 to 0.1 wt.% silicon, 0,01 to 1 wt.% manganese, 9.5 to 11 wt.% chromium, 0.1 to 0.8 wt.% nickel, 0.1 to 0.3 wt.% vanadium, 0.01 to 0.2 wt.% niobium and tantalum, 0.01 to 0.1 wt.% nitrogen, 0.01 to 0.5 wt.% molybdenum, 0.9 to 3.5 wt.% tungsten, 0.1 to 4 wt.% cobalt, 0.01 to 0.2 wt.% hafnium, inevitable impurities, and iron. (2) A steam turbine rotor material for high-temperature use having the same composition as the material (1) except that nickel is not contained. (3) A steam turbine rotor material for high-temperature use having the same composition as the material (1) or (2) except that it further contains 0.001 to 0.01 wt.% boron. (4) A steam turbine rotor material for high-temperature use having the same composition as the material (1), (2), or (3) except that is further contains 0.005 to 0.5 wt.% neodymium in place of part or the whole of the hafnium and/or part of the iron

IPC 1-7

C22C 38/00; F01D 25/00

IPC 8 full level

C22C 38/00 (2006.01); C22C 38/30 (2006.01); C22C 38/32 (2006.01); C22C 38/46 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01); F01D 5/02 (2006.01); F01D 5/28 (2006.01); F01D 25/00 (2006.01)

CPC (source: EP)

C22C 38/46 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01)

Citation (search report)

[Y] EP 0691416 A1 19960110 - JAPAN STEEL WORKS LTD [JP], et al
[Y] US 5591391 A 19970107 - IGARASHI MASAAKI [JP], et al
[PA] EP 0754774 A1 19970122 - MITSUBISHI HEAVY IND LTD [JP]
[Y] PATENT ABSTRACTS OF JAPAN vol. 017, no. 247 (C - 1059) 18 May 1993 (1993-05-18)
See references of WO 9830727A1

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI NL SE

DOCDB simple family (publication)

WO 9830727 A1 19980716; CZ 284998 A3 19991117; EP 0896071 A1 19990210; EP 0896071 A4 20010620; JP 3245097 B2 20020107; JP H10251811 A 19980922

DOCDB simple family (application)

JP 9704580 W 19971212; CZ 284998 A 19971212; EP 97947913 A 19971212; JP 22324397 A 19970820