EP 0265402 A1 19880427 - Calcium treated boron alloyed steel with improved machinability.
Title (en)
Calcium treated boron alloyed steel with improved machinability.
Title (de)
Mit Kalzium behandelter, Bor enthaltender Stahl mit verbesserter Zerspannbarkeit.
Title (fr)
Acier traité au calcium et contenant du bore, présentant une meilleure usinabilité.
Publication
Application
Priority
FI 863918 A 19860929
Abstract (en)
The invention concerns a calcium-treated steel alloy, wherein the hardenability effect of boron is combined with an improved machinability. The chemical composition of the steel in percentages by weight is 0.01 - 0.5% carbon, 0.01 - 2.0% silicon, 0.4 - 1.6% manganese, 0.01 - 0.3% sulphur, 0 - 2.0% chromium, 0 - 0.8% molybdenum, 0.002 - 0.02% boron, 0 - 0.015% titanium, 0.005 - 0.014% aluminium, 0.0015 - 0.01% calcium and in addition B = (0.5 - 2) x (N - Ti/3.4), wherein B is the boron content, N the nitrogen content and Ti the titanium content in percentages by weight.
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP)
C22C 38/002 (2013.01); C22C 38/60 (2013.01)
Citation (search report)
- [Y] US 4265660 A 19810505 - GIFLO HENRIK
- [Y] US 2388214 A 19451030 - WILLIAM MURPHY DONALD
- [A] US 3634073 A 19720111 - CUTTON JOHN G, et al
- [A] FR 2088862 A5 19720107 - NIPPON KOKAN KK
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0265402 A1 19880427; EP 0265402 B1 19910828; AT E66700 T1 19910915; DE 265402 T1 19900208; DE 3772511 D1 19911002; FI 75870 B 19880429; FI 75870 C 19880808; FI 863918 A0 19860929
DOCDB simple family (application)
EP 87850292 A 19870928; AT 87850292 T 19870928; DE 3772511 T 19870928; DE 87850292 T 19870928; FI 863918 A 19860929