EP 4112754 A1 20230104 - PRECIPITATION-HARDENING MARTENSITIC STAINLESS STEEL
Title (en)
PRECIPITATION-HARDENING MARTENSITIC STAINLESS STEEL
Title (de)
PRÄZIPITATIONSSHÄRTENDER MARTENSITISCHER EDELSTAHL
Title (fr)
ACIER INOXYDABLE MARTENSITIQUE À DURCISSEMENT PAR PRÉCIPITATION
Publication
Application
Priority
- JP 2020031787 A 20200227
- JP 2020040211 W 20201027
Abstract (en)
A precipitation hardening martensite stainless steel can maintain improved strength and toughness by performing aging heat treatment, the precipitation hardening martensite stainless steel comprising: in mass%, indicated by "%", C: 0.01 to 0.05%, Si: 1.0 to 2.0%, Mn: 0.70 to 1.50%, P: not more than 0.04%, S: not more than 0.01%, Ni: 6.0 to 8.0%, Cr: 12.0 to 15.0%, Mo: 0.50 to 1.50%, Cu: 0.40 to 1.20%, Ti: 0.20 to 0.50%, Nb: 0.05 to 0.40%, N: 0.001 to 0.005%, Al: 0.001 to 0.2%, O: 0.0001 to 0.01%, with inevitable impurities and Fe being the remainder, wherein Cu phase and Ni<sub>16</sub>(Ti, Nb)<sub>6</sub>Si<sub>7</sub> type intermetallic compounds phase are distributed, and Nb in the intermetallic compounds phase is 0.2 to 3.0 (at%).
IPC 8 full level
C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/50 (2006.01)
CPC (source: EP)
C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C21D 1/26 (2013.01); C21D 6/004 (2013.01); C21D 8/0247 (2013.01); C21D 9/46 (2013.01); C21D 2211/004 (2013.01); C21D 2211/008 (2013.01)
Citation (search report)
See references of WO 2021171698A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4112754 A1 20230104; CN 115210389 A 20221018; JP 2021134395 A 20210913; JP 6776467 B1 20201028; WO 2021171698 A1 20210902
DOCDB simple family (application)
EP 20920783 A 20201027; CN 202080097683 A 20201027; JP 2020031787 A 20200227; JP 2020040211 W 20201027