EP 1770184 B1 20160504 - High-strength martensite heat resisting cast steel and method of producing the steel
Title (en)
High-strength martensite heat resisting cast steel and method of producing the steel
Title (de)
Martensitischer Hochfester Hitzebeständiger Gussstahl und dessen Herstellungsverfahren
Title (fr)
Acier martensitique coulé thermorésistant à haute résistance et procédé de sa fabrication
Publication
Application
Priority
JP 2005283198 A 20050929
Abstract (en)
[origin: EP1770184A1] A high-strength martensite heat resisting steel which has long-time creep rupture strength required for steam temperature condition of 600 - 630°C and toughness at room temperature, and which is suitable for use as a material of a steam turbine rotor shaft and as large-sized forged steel with an improvement of hot forgeability. A method of producing the steel and applications of the steel are also provided. The high-strength martensite heat resisting steel contains 0.05 - 0.20% by mass of C, 0.1% or less of Si, 0.05 - 0.6% of Mn, 0.1 - 0.6% of Ni, 9.0 - 12.0% of Cr, 0.20 - 0.65% of Mo, 2.0 - 3.0% of W, 0.1 - 0.3% of V, 2.0% or less of Co, 0.02 - 0.20% of Nb, 0.015% or less of B, 0.01 - 0.10% of N, and 0.015% or less of Al, (W/Mo) being 4.0 - 10.0.
IPC 8 full level
C21D 8/00 (2006.01); C21D 9/28 (2006.01); C21D 9/38 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/52 (2006.01); F01D 5/02 (2006.01); F01D 5/28 (2006.01)
CPC (source: EP US)
C21D 8/00 (2013.01 - EP US); C21D 9/28 (2013.01 - EP US); C21D 9/38 (2013.01 - EP US); C22C 38/001 (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); F01D 5/02 (2013.01 - EP US); F01D 5/28 (2013.01 - EP US); F05D 2230/25 (2013.01 - EP US); F05D 2230/40 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 1770184 A1 20070404; EP 1770184 B1 20160504; JP 2007092122 A 20070412; JP 4542490 B2 20100915; US 2010122754 A1 20100520
DOCDB simple family (application)
EP 06020146 A 20060926; JP 2005283198 A 20050929; US 52847406 A 20060928