EP 1751321 A2 20070214 - STEEL WITH HIGH MECHANICAL STRENGTH AND WEAR RESISTANCE
Title (en)
STEEL WITH HIGH MECHANICAL STRENGTH AND WEAR RESISTANCE
Title (de)
STAHL MIT HOHER MECHANISCHER FESTIGKEIT UND VERSCHLEISSFESTIGKEIT
Title (fr)
ACIER A HAUTE RESISTANCE MECANIQUE ET A L'USURE
Publication
Application
Priority
- FR 2005001191 W 20050512
- FR 0405535 A 20040521
Abstract (en)
[origin: WO2005123975A2] The invention relates to a steel with high mechanical strength and wear resistance. More specifically, the invention relates to a method of reducing the segregated veins of a steel having high mechanical strength, high wear resistance and the following weight composition: 0.30 % = C = 1.42 %; 0.05 % = Si = 1.5 %; Mn = 1.95 %; Ni = 2.9 %; 1.1 % = Cr = 7.9 %; 0.61 % = Mo = 4.4 %; optionally V = 1.45 %, Nb = 1.45 %, Ta = 1.45 % and V+Nb/2 + Ta/4 = 1.45 %; less than 0.1 % borium, 0.19 % (S + Se/2 + Te/4), 0.01 % calcium, 0.5 % rare earths, 1 % aluminium, 1 % copper; the remainder being iron and impurities resulting from the production thereof. The composition also comprises: 800 = D = 1150, where D = 540(C)<0.25> + 245 (Mo + 3 V + 1.5 Nb + 0.75 Ta)<0.30> + 125 Cr<0.20 >+ 15.8 Mn + 7.4 Ni + 18 Si. According to the invention, all or part of the molydenum is replaced by a double proportion of tungsten, such that W > 0.21 %, and Ti, Zr, C are adjusted so that, after said adjustment, Ti + Zr/2 = 0.2 W, (Ti + Zr/2) X C = 0.07, Ti + Zr/2 = 1.49 % and D is unchanged at 5 %. The invention also relates to the steel obtained and to a method of producing a steel part.
IPC 8 full level
C22C 38/44 (2006.01); C21D 8/00 (2006.01); C22C 38/46 (2006.01); C22C 38/50 (2006.01); C21D 6/00 (2006.01); C21D 7/13 (2006.01)
CPC (source: EP KR US)
C22C 33/006 (2013.01 - KR); C22C 38/005 (2013.01 - KR); C22C 38/02 (2013.01 - KR); C22C 38/04 (2013.01 - KR); C22C 38/06 (2013.01 - KR); C22C 38/42 (2013.01 - KR); C22C 38/44 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - KR); C22C 38/50 (2013.01 - EP US); C22C 38/60 (2013.01 - KR); C21D 6/002 (2013.01 - EP US); C21D 7/13 (2013.01 - EP US)
Citation (search report)
See references of WO 2005123975A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR LV MK YU
DOCDB simple family (publication)
FR 2870546 A1 20051125; FR 2870546 B1 20060901; AU 2005254750 A1 20051229; AU 2005254750 B2 20091029; BR PI0510826 A 20071127; BR PI0510826 B1 20170926; CA 2565162 A1 20051229; CA 2565162 C 20130730; CN 100469937 C 20090318; CN 1957101 A 20070502; EP 1751321 A2 20070214; EP 1751321 B1 20190306; ES 2729644 T3 20191105; HU E043693 T2 20190930; JP 2007538154 A 20071227; JP 5490991 B2 20140514; KR 101214879 B1 20121224; KR 20070017409 A 20070209; KR 20120126128 A 20121120; PL 1751321 T3 20190830; RU 2006145432 A 20080627; RU 2369659 C2 20091010; SI 1751321 T1 20190731; TR 201908207 T4 20190621; TW 200600590 A 20060101; TW I371497 B 20120901; US 2008159901 A1 20080703; US 2010221139 A1 20100902; US 7794651 B2 20100914; US 8097207 B2 20120117; WO 2005123975 A2 20051229; WO 2005123975 A3 20061221; ZA 200608963 B 20080730
DOCDB simple family (application)
FR 0405535 A 20040521; AU 2005254750 A 20050512; BR PI0510826 A 20050512; CA 2565162 A 20050512; CN 200580016318 A 20050512; EP 05770867 A 20050512; ES 05770867 T 20050512; FR 2005001191 W 20050512; HU E05770867 A 20050512; JP 2007517329 A 20050512; KR 20067026256 A 20061213; KR 20127028330 A 20050512; PL 05770867 T 20050512; RU 2006145432 A 20050512; SI 200532254 T 20050512; TR 201908207 T 20050512; TW 94115950 A 20050517; US 56937905 A 20050512; US 77653910 A 20100510; ZA 200608963 A 20061030