EP 0229325 A2 19870722 - Corrosion resistant steel components and method of manufacture.
Title (en)
Corrosion resistant steel components and method of manufacture.
Title (de)
Korrosionsbeständige Werkstücke aus Stahl und Verfahren zu deren Herstellung.
Title (fr)
Pièces d'acier résistant à la corrosion et procédé pour leur fabrication.
Publication
Application
Priority
- EP 82305400 A 19821011
- GB 8131133 A 19811015
- GB 8138318 A 19811218
- GB 8205999 A 19820226
- GB 8220495 A 19820715
Abstract (en)
A non-alloy steel component is nitrocarburised at 550 DEG C to 720 DEG C for up to 4 hours in a nitriding gaseous atmosphere eg ammonia or ammonia and endothermic or exothermic gas. The component is then cooled polished or lapped to a surface roughness of not more than 0.2 micrometres Ra, reheated in air to oxidise and finally quenched. These techniques give a good corrosion resistance to the component.
IPC 1-7
IPC 8 full level
C21D 9/00 (2006.01); C23C 8/26 (2006.01); C23C 8/34 (2006.01); C23C 8/80 (2006.01)
CPC (source: EP)
C21D 9/0068 (2013.01); C23C 8/26 (2013.01); C23C 8/34 (2013.01); C23C 8/80 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0229325 A2 19870722; EP 0229325 A3 19880921; EP 0229325 B1 19950104
DOCDB simple family (application)
EP 86117233 A 19821011