EP 0674014 A1 19950927 - NON-HEAT-TREATED HOT-FORGING STEEL EXCELLENT IN TENSILE STRENGTH, FATIGUE STRENGTH AND MACHINABILITY.
Title (en)
NON-HEAT-TREATED HOT-FORGING STEEL EXCELLENT IN TENSILE STRENGTH, FATIGUE STRENGTH AND MACHINABILITY.
Title (de)
WÄRMEUNBEHANDELTER WARMGESCHMIEDETER STAHL MIT HERVORRAGENDER ZUGFESTIGKEIT, ERMÜDUNGSFESTIGKEIT UND BEARBEITBARKEIT.
Title (fr)
ACIER DE FORGEAGE A CHAUD SANS TRAITEMENT THERMIQUE, PRESENTANT D'EXCELLENTES CARACTERISTIQUES DE RESISTANCE A LA TRACTION ET A LA FATIGUE ET UNE TRES BONNE APTITUDE A L'USINAGE.
Publication
Application
Priority
- JP 9401693 W 19941011
- JP 25433593 A 19931012
Abstract (en)
A non-heat-treated ferritic-bainitic steel to be used as hot-forged, wherein the following relation holds between the bainitic structure fraction f and the carbon content C(%): 1.4C + 0.4 >/= f >/= 1.4C in the metal structure after hot forging a steel material containing the following elements on the weight basis: C: 0.10 SIMILAR 0.35 %; Si: 0.15 SIMILAR 2.00 %; Mn: 0.40 SIMILAR 2.00 %; S: 0.03 SIMILAR 0.10 %; Al: 0.0005 SIMILAR 0.05 %; Ti: 0.003 SIMILAR 0.05 %; N: 0.0020 SIMILAR 0.0070 %; V: 0.30 SIMILAR 0.70 % and further containing at least one of Cr, Mo, Nb, Pb and Ca in a specified amount and cooling the forged steel to room temperature. It is possible to produce a non-heat-treated hot-forging steel having high tensile strength, fatigue strength and machinability.
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/14 (2006.01); C22C 38/28 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP KR)
C22C 38/001 (2013.01 - EP); C22C 38/14 (2013.01 - KR); C22C 38/28 (2013.01 - EP KR); C22C 38/60 (2013.01 - EP KR)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9510637 A1 19950420; CN 1039035 C 19980708; CN 1115582 A 19960124; DE 69419720 D1 19990902; DE 69419720 T2 19991216; EP 0674014 A1 19950927; EP 0674014 A4 19960207; EP 0674014 B1 19990728; JP 3241897 B2 20011225; JP H07109545 A 19950425; KR 0180938 B1 19990218; KR 950704530 A 19951120
DOCDB simple family (application)
JP 9401693 W 19941011; CN 94190781 A 19941011; DE 69419720 T 19941011; EP 94929026 A 19941011; JP 25433593 A 19931012; KR 19950702391 A 19950612