Global Patent Index - EP 1865088 B1

EP 1865088 B1 20090916 - Method for tempering stainless steel and fused salt for performing the method

Title (en)

Method for tempering stainless steel and fused salt for performing the method

Title (de)

Verfahren zum Härten von Edelstahl und Salzschmelze zur Durchführung des Verfahrens

Title (fr)

Procédé destiné au durcissement de l'acier inoxydable et de sels fondus pour l'exécution du procédé

Publication

EP 1865088 B1 20090916 (DE)

Application

EP 07010534 A 20070526

Priority

DE 102006026883 A 20060609

Abstract (en)

[origin: DE102006026883B3] In the hardening of a stainless steel workpiece, the workpiece surface is exposed to an incoming diffused atmosphere of carbon and/or nitrogen. The workpiece is submerged in a hot molten salt solution of KCl (30-60 wt.%), LiCl (20-40 wt.%), BaCl 2 and or SrCl 2 and or MgCl 2 and or CaCl 2 (15-30 wt.%), and free or complex cyanide (0.2-25 wt.%). The bath solution is maintained at 450[deg]C and the workpiece is maintained in a submerged condition for 15 minutes to 240 hours.

IPC 8 full level

C23C 8/46 (2006.01); C23C 8/50 (2006.01); C23C 8/56 (2006.01)

CPC (source: EP KR US)

C21D 1/46 (2013.01 - KR); C23C 8/46 (2013.01 - EP US); C23C 8/50 (2013.01 - EP US); C23C 8/56 (2013.01 - EP US)

Designated contracting state (EPC)

AT BE CH CZ DE ES FR GB IT LI NL PL SE TR

DOCDB simple family (publication)

US 2008099108 A1 20080501; US 7909943 B2 20110322; AT E443163 T1 20091015; BR PI0702568 A 20080219; BR PI0702568 B1 20151013; CA 2591244 A1 20071209; CN 101235477 A 20080806; CN 101235477 B 20110518; DE 102006026883 B3 20070816; DE 102006026883 B8 20071004; DE 502007001522 D1 20091029; EP 1865088 A1 20071212; EP 1865088 B1 20090916; ES 2331383 T3 20091230; JP 2007332459 A 20071227; JP 5101173 B2 20121219; KR 20070118008 A 20071213; MX 2007006969 A 20081030; PL 1865088 T3 20100129; ZA 200704591 B 20080827

DOCDB simple family (application)

US 80855707 A 20070611; AT 07010534 T 20070526; BR PI0702568 A 20070608; CA 2591244 A 20070605; CN 200710194450 A 20070608; DE 102006026883 A 20060609; DE 502007001522 T 20070526; EP 07010534 A 20070526; ES 07010534 T 20070526; JP 2007152834 A 20070608; KR 20070054825 A 20070605; MX 2007006969 A 20070608; PL 07010534 T 20070526; ZA 200704591 A 20070608