EP 2881492 B1 20170503 - Method for carburising metal deep drawn article or a bent pressed article made of austenitic stainless steel
Title (en)
Method for carburising metal deep drawn article or a bent pressed article made of austenitic stainless steel
Title (de)
Verfahren zur Aufkohlung eines Tiefziehartikels oder eines Stanzbiegeartikels aus austenitischem nichtrostendem Edelstahl
Title (fr)
Procédé de carburation d'un article thermoformé ou d'un article plié-découpé à partir d'acier inoxydable austénitique
Publication
Application
Priority
EP 13196076 A 20131206
Abstract (en)
[origin: CN104451534A] The invention relates to a method for carburizing a deep drawing product or a punched bending product made of austenite rustproof stainless steel and having small wall thickness. The small wall thickness is common in at least some areas for such products. In a first process step, a product is inserted into an oven and heated to a first temperature; and the oxygen-containing standard atmosphere in the over is replaced with a first gas mixture. In a second process step, the product is heated to a second temperature; and the first gas mixture is replaced with a second gas mixture. In a third process step, the product is maintained at the second temperature; and the second gas mixture is replaced with a third gas mixture. In a fourth process step, the product is cooled to a third temperature; and the third gas mixture is replaced with a fourth gas mixture.
IPC 8 full level
C21D 1/74 (2006.01); C23C 8/02 (2006.01); C23C 8/22 (2006.01)
CPC (source: CN EP US)
C21D 1/74 (2013.01 - EP US); C23C 8/02 (2013.01 - CN EP US); C23C 8/22 (2013.01 - CN EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2881492 A1 20150610; EP 2881492 B1 20170503; CN 104451534 A 20150325; CN 104451534 B 20180427; PL 2881492 T3 20171031; US 2015159260 A1 20150611; US 9738962 B2 20170822
DOCDB simple family (application)
EP 13196076 A 20131206; CN 201410737053 A 20141204; PL 13196076 T 20131206; US 201414557574 A 20141202