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EP 1745158 B1 20101215 - METHOD FOR TREATING SURFACES

Title (en)

METHOD FOR TREATING SURFACES

Title (de)

VERFAHREN ZUR OBERFLÄCHENBEHANDLUNG

Title (fr)

PROCEDE POUR TRAITER UNE SURFACE

Publication

EP 1745158 B1 20101215 (DE)

Application

EP 05716985 A 20050310

Priority

EP 2005051077 W 20050310
DE 102004021043 A 20040429

Abstract (en)

[origin: WO2005106063A1] The invention relates to a method for a treating a metallic surface (10), in particular a steel spring wire, for the production of pressure spiral springs. The metallic surface (10) is subjected to a nitration process or to a nitrocarburisation process. All areas (14) of the metallic surface, which are not nitrated or nitrocarburized, are subjected to a cold forming process prior to the nitration or nitrocarburisation process.

IPC 8 full level

C23C 8/04 (2006.01)

CPC (source: EP)

C23C 8/04 (2013.01)

Designated contracting state (EPC)

DE FR

DOCDB simple family (publication)

WO 2005106063 A1 20051110; DE 102004021043 A1 20051124; DE 502005010685 D1 20110127; EP 1745158 A1 20070124; EP 1745158 B1 20101215

DOCDB simple family (application)

EP 2005051077 W 20050310; DE 102004021043 A 20040429; DE 502005010685 T 20050310; EP 05716985 A 20050310