Global Patent Index - EP 0516899 A1

EP 0516899 A1 19921209 - Method of nitriding steel.

Title (en)

Method of nitriding steel.

Title (de)

Verfahren der Nitrierung von Stahl.

Title (fr)

Procédé de nitration d'acier.

Publication

EP 0516899 A1 19921209 (EN)

Application

EP 91305033 A 19910604

Priority

  • EP 91305033 A 19910604
  • CN 91104154 A 19910624

Abstract (en)

This invention relates to a method for forming a uniform, deep nitride layer on and in steel works at low cost, wherein a steel work is fluorided in heated condition in an atmosphere of a mixed gas composed of fluorine gas and inert gas with or without nitrogen trifluoride gas and, then, nitrided in heated condition in an atmosphere of nitriding gas.

IPC 1-7

C23C 8/34

IPC 8 full level

C23C 4/02 (2006.01); C23C 4/18 (2006.01); C23C 8/02 (2006.01); C23C 8/26 (2006.01); C23C 8/34 (2006.01)

CPC (source: EP)

C23C 4/02 (2013.01); C23C 4/18 (2013.01); C23C 8/02 (2013.01); C23C 8/26 (2013.01); C23C 8/34 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT CH DE DK ES FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0516899 A1 19921209; EP 0516899 B1 19951011; AT E129023 T1 19951015; CN 1032375 C 19960724; CN 1067929 A 19930113; DE 69113789 D1 19951116; DE 69113789 T2 19960425; DK 0516899 T3 19960226; ES 2082138 T3 19960316

DOCDB simple family (application)

EP 91305033 A 19910604; AT 91305033 T 19910604; CN 91104154 A 19910624; DE 69113789 T 19910604; DK 91305033 T 19910604; ES 91305033 T 19910604