EP 2310546 A1 20110420 - HARDENED MARTENSITIC STEEL HAVING A LOW COBALT CONTENT, PROCESS FOR MANUFACTURING A PART FROM THIS STEEL, AND PART THUS OBTAINED
Title (en)
HARDENED MARTENSITIC STEEL HAVING A LOW COBALT CONTENT, PROCESS FOR MANUFACTURING A PART FROM THIS STEEL, AND PART THUS OBTAINED
Title (de)
ANGELASSENER MARTENSITISCHER STAHL, VERFAHREN ZUR HERSTELLUNG EINES TEILS AUS DEM STAHL UND DADURCH ERHALTENES TEIL
Title (fr)
ACIER MARTENSITIQUE DURCI À TENEUR FAIBLE EN COBALT, PROCÉDÉ DE FABRICATION D'UNE PIÈCE À PARTIR DE CET ACIER, ET PIÈCE AINSI OBTENUE
Publication
Application
Priority
- FR 2009051351 W 20090708
- FR 0854810 A 20080715
Abstract (en)
[origin: WO2010007297A1] Hardened martensitic steel having a low cobalt content, process for manufacturing a part from this steel, and part thus obtained. The steel is characterized in that its composition is, in percentages by weight: C = 0.18-0.30%; Co = 1.5 - 4%; Cr = 2-5%; Al = 1-2%; Mo + W/2 = 1-4%; V = traces - 0.3%; Nb = traces - 0.1%; B = traces - 30 ppm; Ni = 11-16%, where Ni = 7 + 3.5 Al; Si = traces - 1.0%; Mn = traces - 4.0%; Ca = traces - 20 ppm; rare earths = traces - 100 ppm; if N = 10 ppm, Ti + Zr/2 = traces - 100 ppm, where Ti + Zr/2 = 10N; if 10 ppm < N = 20 ppm, Ti + Zr/2 = traces - 150 ppm; O = traces - 50 ppm; N = traces - 20 ppm; S = traces - 20 ppm; Cu = traces - 1%; P = traces - 200 ppm, the balance being iron and inevitable impurities resulting from the smelting. Process for manufacturing a part from this steel, and part thus obtained.
IPC 8 full level
C21D 1/32 (2006.01); C21D 6/00 (2006.01); C21D 6/04 (2006.01); C21D 9/00 (2006.01); C21D 9/28 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP US)
C21D 1/32 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 6/007 (2013.01 - EP US); C21D 6/04 (2013.01 - EP US); C21D 9/0068 (2013.01 - EP US); C21D 9/28 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/42 (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); C21D 2211/008 (2013.01 - EP US)
Citation (search report)
See references of WO 2010007297A1
Designated contracting state (EPC)
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 SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
WO 2010007297 A1 20100121; CA 2730520 A1 20100121; CA 2730520 C 20161122; CN 102131947 A 20110720; CN 102131947 B 20130327; EP 2310546 A1 20110420; EP 2310546 B1 20170322; ES 2624912 T3 20170718; FR 2933990 A1 20100122; FR 2933990 B1 20100813; JP 2011528068 A 20111110; JP 5710478 B2 20150430; PL 2310546 T3 20170831; RU 2011105417 A 20120820; RU 2497974 C2 20131110; US 2011226386 A1 20110922; US 9175370 B2 20151103
DOCDB simple family (application)
FR 2009051351 W 20090708; CA 2730520 A 20090708; CN 200980132722 A 20090708; EP 09784484 A 20090708; ES 09784484 T 20090708; FR 0854810 A 20080715; JP 2011517968 A 20090708; PL 09784484 T 20090708; RU 2011105417 A 20090708; US 200913054028 A 20090708