EP 0787812 B1 20040317 - Process for manufacturing steel forging
Title (en)
Process for manufacturing steel forging
Title (de)
Herstellungsverfahren eines Stahlschmiedestücks
Title (fr)
Procédé de fabrication d'une pièce forgée en acier
Publication
Application
Priority
FR 9601525 A 19960208
Abstract (en)
[origin: EP0787812A1] Steel for forging comprises by weight 0.1-0.4% carbon, 1-1.8% manganese, 0.15-1.7% silicon and up to 1% nickel, 1.2% chromium, 0.3% molybdenum, 0.3% vanadium and 0.35% copper. Optional ingredients are 0.005-0.06% aluminium, 0.0005-0.01% boron, 0.005-0.03% titanium, 0.005-0.06% niobium, 0.005-0.1% sulphur and up to 0.006% calcium,, 0.03% tellurium, 0.05% selenium, 0.05% bismuth and 0.1% lead, the remainder being iron and impurities. Also claimed is hot-forging a component from an ingot of the steel followed by heat treatment to produce a structure comprising at least 15% bainite and at least 20% ferrite perlite.
IPC 1-7
IPC 8 full level
C21D 1/02 (2006.01); C21D 1/20 (2006.01); B21J 5/00 (2006.01); C21D 7/13 (2006.01); C21D 8/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP US)
C21D 1/02 (2013.01 - EP US); C21D 1/20 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US)
Citation (examination)
- JP H0617188 A 19940125 - NIPPON KOKAN KK
- JP S6096718 A 19850530 - KOBE STEEL LTD
- FARGUES J.: "Traitement de trempe étagée bainitique des fontes", no. 106, June 1991 (1991-06-01), FONDERIE-FONDEUR D'AUJOURD'HUI, pages 31 - 39, XP000228780
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 0787812 A1 19970806; EP 0787812 B1 20040317; AR 005719 A1 19990714; AT E262047 T1 20040415; BR 9700917 A 19980901; CA 2196029 A1 19970809; CZ 293691 B6 20040714; CZ 37897 A3 19970813; DE 69728076 D1 20040422; DE 69728076 T2 20040805; DK 0787812 T3 20040726; ES 2217374 T3 20041101; FR 2744733 A1 19970814; FR 2744733 B1 19980424; HU 9700269 D0 19970328; HU P9700269 A2 19980428; HU P9700269 A3 19990428; JP 3915043 B2 20070516; JP H09209086 A 19970812; KR 970062058 A 19970912; MX 9700924 A 19980531; NO 970548 D0 19970206; NO 970548 L 19970811; PL 182920 B1 20020430; PL 318366 A1 19970818; PT 787812 E 20040930; SI 9700025 A 19971031; SI 9700025 B 20020228; US 5820706 A 19981013
DOCDB simple family (application)
EP 97400025 A 19970108; AR P970100459 A 19970205; AT 97400025 T 19970108; BR 9700917 A 19970207; CA 2196029 A 19970127; CZ 37897 A 19970207; DE 69728076 T 19970108; DK 97400025 T 19970108; ES 97400025 T 19970108; FR 9601525 A 19960208; HU P9700269 A 19970128; JP 4166097 A 19970210; KR 19970003801 A 19970206; MX 9700924 A 19970206; NO 970548 A 19970206; PL 31836697 A 19970207; PT 97400025 T 19970108; SI 9700025 A 19970204; US 79713597 A 19970210