EP 0866145 A2 19980923 - Completely martensitic steel alloy
Title (en)
Completely martensitic steel alloy
Title (de)
Vollmartensitsche Stahllegierung
Title (fr)
Alliage d'acier complètement martensitique
Publication
Application
Priority
DE 19712020 A 19970321
Abstract (en)
A novel fully martensitic hardenable steel has the composition (by wt.) 8-15% Cr, up to 15% Co, up to 4% Mn, up to 4% Ni, up to 8% Mo, up to 6% W, 0.5-1.5% V, up to 0.15% Nb, up to 0.04% Ti, up to 0.4% Ta, up to 0.02% Zr, up to 0.02% Hf, NOTGREATER 50 ppm B, up to 0.1% C, 0.12-0.25% N, balance Fe and impurities, the sum of Mn + Ni being less than 4% and the sum of Mo + W being less than 8%. Also claimed is a heat treatment process for the above steel, comprising solution annealing at 1150-1250 degrees C for 0.5-15 hrs., cooling to room temperature and then tempering at 600-820 degrees C for 0.5-25 hrs.
Abstract (de)
Ein vollmartensitischer Vergütungsstahl (AP) besteht im wesentlichen aus: (gemessen in Gew.-%) 8 bis 15% Cr, bis 15% Co, bis 4% Mn, bis 4%Ni, bis 8% Mo, bis 6%W, 0.5 bis 1.5%V, bis 0.15%Nb, bis 0.04%Ti, bis 0.4%Ta, bis 0.02% Zr, bis 0.02% Hf, maximal 50 ppm B, bis 0.1%C und 0.12-0.25%N, wobei der Gehalt an Mn+Ni kleiner als 4% und der Gehalt an Mo+W kleiner als 8% ist, Rest Eisen und übliche erschmelzungsbedingte Verunreinigungen. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 1/00 (2006.01); C21D 1/26 (2006.01); C21D 6/00 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); C22C 38/24 (2006.01); C22C 38/30 (2006.01); C22C 38/58 (2006.01); C21D 1/18 (2006.01)
CPC (source: EP US)
C21D 6/002 (2013.01 - EP US); C22C 33/0285 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/30 (2013.01 - EP US); C21D 1/18 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE ES FR GB SE
DOCDB simple family (publication)
EP 0866145 A2 19980923; EP 0866145 A3 19981223; EP 0866145 B1 20030507; AT E239804 T1 20030515; DE 19712020 A1 19980924; DE 59808216 D1 20030612; ES 2199414 T3 20040216; JP 4204089 B2 20090107; JP H10265914 A 19981006; US 6030469 A 20000229
DOCDB simple family (application)
EP 98810193 A 19980309; AT 98810193 T 19980309; DE 19712020 A 19970321; DE 59808216 T 19980309; ES 98810193 T 19980309; JP 6829398 A 19980318; US 4478498 A 19980320