EP 0908530 B1 20020904 - Blade for a saw or a knife and method of manufacturing
Title (en)
Blade for a saw or a knife and method of manufacturing
Title (de)
Blatt für eine Säge oder ein Messer und Herstellungsverfahren
Title (fr)
Lame pour une scie ou un couteau et procédé de fabrication
Publication
Application
Priority
DE 19744512 A 19971009
Abstract (en)
[origin: EP0908530A1] A saw or knife stock blade consists of carbonitrided steel having a maximum carbon penetration depth of 20 microns and a maximum nitrogen penetration depth of 400 microns. An Independent claim is also included for producing the above blade by simultaneously diffusing nitrogen and carbon into a steel at up to 600 degrees C. Preferred Features: The steel is a martensitic hardenable steel which is carbonitrided to obtain a surface hardness of e.g. 54-68 HRC (600-940 HV 1), a core hardness of 32-50 HRC (315-530 HV 1) and a hardness gradient, in the nitrogen diffusion region, of 0.15-0.25 HRC/ mu for saw blades or 0.3-0.4 HRC/ mu for knife blades.
IPC 1-7
IPC 8 full level
C23C 8/32 (2006.01)
CPC (source: EP)
C23C 8/32 (2013.01)
Designated contracting state (EPC)
AT BE DE ES FI FR GB IT NL SE
DOCDB simple family (publication)
EP 0908530 A1 19990414; EP 0908530 B1 20020904; AT E223513 T1 20020915; DE 19744512 A1 19990415; DE 59805388 D1 20021010; ES 2180106 T3 20030201
DOCDB simple family (application)
EP 98118991 A 19981008; AT 98118991 T 19981008; DE 19744512 A 19971009; DE 59805388 T 19981008; ES 98118991 T 19981008