EP 0890653 B1 20030813 - Process for manufacturing of articles from carburized or carbonitrided steel and steel for the manufacturing of said articles
Title (en)
Process for manufacturing of articles from carburized or carbonitrided steel and steel for the manufacturing of said articles
Title (de)
Herstellungsverfahren für Bauteile aus zementierter oder carbonitrierter Stahl und Stahl für die Herstellung dieser Bauteile
Title (fr)
Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce
Publication
Application
Priority
FR 9708770 A 19970710
Abstract (en)
[origin: EP0890653A1] A novel carburising or carbonitriding steel has the composition (by wt.) 0.2-0.26% C, 0.05-0.5% Si, 1 to less than 1.6% Mn, 0.4-1.5% Cr, 0.08 to less than 0.27% Mo, 0 to less than 0.6% Ni, 0.003-0.06% Al, 0-0.3% Cu, 0-0.1% S, less than 0.03% P, optionally up to 0.02% Te, up to 0.04% Se, up to 0.07% Pb and up to 0.005% Ca, balance Fe and impurities. Also claimed is a process for manufacturing a mechanical steel part by subjecting a rough steel part to surface carburising or carbonitriding, the steel having (a) the composition (by wt.) 0.15-0.35% C, 0-0.6% Si, 0 to less than 5% Mn + Cr + Ni + Mo, 0-0.1% Al, 0 to less than 0.5% Cu, 0-0.15% S, less than 0.03% P, optionally up to 0.02% Te, up to 0.04% Se, up to 0.07% Pb and up to 0.005% Ca, balance Fe and impurities; (b) a Jominy curve in which J3 = 45-50 HRC, J11 = 39-47 HRC and J25 = 31-40 HRC; and (c) average values J3m, J11m, J15m and J25m of five Jominy tests such that MOD(J11m - J3m x 13 divided by 22 - J25m x 8 divided by 22) = ≤ 2.5 HRC and J3m - J15m = ≤ 9 HRC.
IPC 1-7
IPC 8 full level
C21D 1/06 (2006.01); C23C 8/22 (2006.01); C21D 1/55 (2006.01); C21D 1/78 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/18 (2006.01); C22C 38/60 (2006.01); C23C 8/26 (2006.01); C23C 8/30 (2006.01); C23C 8/32 (2006.01)
CPC (source: EP US)
C22C 38/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0890653 A1 19990113; EP 0890653 B1 20030813; AR 013198 A1 20001213; AT E247179 T1 20030815; AU 7394398 A 19990121; AU 744729 B2 20020228; BR 9802358 A 20001017; CA 2243101 A1 19990110; CA 2243101 C 20090324; CN 1079446 C 20020220; CN 1211632 A 19990324; CZ 213898 A3 19990113; CZ 297683 B6 20070307; DE 69817098 D1 20030918; DE 69817098 T2 20040401; DE 890653 T1 19990602; DK 0890653 T3 20031201; ES 2126546 T1 19990401; ES 2126546 T3 20040501; FR 2765890 A1 19990115; FR 2765890 B1 19990820; HU 9801540 D0 19980928; HU P9801540 A1 19990528; JP 3656706 B2 20050608; JP H1171613 A 19990316; PL 190892 B1 20060228; PL 327388 A1 19990118; PT 890653 E 20031231; RO 118457 B1 20030530; RU 2201993 C2 20030410; SI 9800193 A 19990430; TR 199801347 A2 19991021; TR 199801347 A3 19991021; TW 460593 B 20011021; UA 58499 C2 20030815; US 6090225 A 20000718; ZA 986061 B 19990201
DOCDB simple family (application)
EP 98400447 A 19980225; AR P980103368 A 19980710; AT 98400447 T 19980225; AU 7394398 A 19980630; BR 9802358 A 19980708; CA 2243101 A 19980709; CN 98117414 A 19980709; CZ 213898 A 19980703; DE 69817098 T 19980225; DE 98400447 T 19980225; DK 98400447 T 19980225; ES 98400447 T 19980225; FR 9708770 A 19970710; HU P9801540 A 19980709; JP 19562998 A 19980710; PL 32738898 A 19980710; PT 98400447 T 19980225; RO 9801160 A 19980709; RU 98113918 A 19980709; SI 9800193 A 19980710; TR 9801347 A 19980710; TW 87110443 A 19980629; UA 98073600 A 19980707; US 11205798 A 19980709; ZA 986061 A 19980709