EP 1717330 A1 20061102 - METAL TUBE FOR USE IN CARBURIZING GAS ATMOSPHERE
Title (en)
METAL TUBE FOR USE IN CARBURIZING GAS ATMOSPHERE
Title (de)
METALLROHR ZUR VERWENDUNG IN AUFKOHLUNGSGASATMOSPHÄRE
Title (fr)
TUBE EN METAL DESTINE A ETRE UTILISE DANS UNE ATMOSPHERE DE GAZ DE CEMENTATION
Publication
Application
Priority
- JP 2005000892 W 20050125
- JP 2004035261 A 20040212
- JP 2004035262 A 20040212
Abstract (en)
A metal tube having the ability to protect against carburizing gas and having improved resistance to metal dusting, to carburization, and to coking has a Cu-enriched layer with a Cu concentration of at least 0.1 atomic percent and a thickness of at least 0.3 nm in a surface region of the metal tube. The alloy composition of the base metal of the metal tube contains, in mass percent, Cr: 15 - 35%, Ni: 30 - 75%, Al: 0.001 - 10%, and Cu: 0.01 - 10%. An oxide scale comprising predominantly Cr with a Cr content of at least 50% or an oxide scale comprising predominantly Cr and Al with a total content of Cr + Al of at least 50% may further be provided on the outer side of the Cu-enriched layer, and between this oxide scale and the Cu-enriched layer, a second oxide scale comprising predominantly Si with an Si content of at least 50% may be provided.
IPC 8 full level
C21D 1/26 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C22C 19/05 (2006.01); C22C 38/00 (2006.01); C22C 38/16 (2006.01); C22C 38/58 (2006.01); C23C 28/00 (2006.01); C23F 15/00 (2006.01)
CPC (source: EP)
C21D 1/26 (2013.01); C21D 8/105 (2013.01); C22C 19/058 (2013.01); C22C 30/00 (2013.01); C23C 28/321 (2013.01); C23C 28/325 (2013.01); C23C 28/345 (2013.01); C23F 15/00 (2013.01)
Designated contracting state (EPC)
DE DK FR GB NL SE
DOCDB simple family (publication)
EP 1717330 A1 20061102; EP 1717330 A4 20120321; EP 1717330 B1 20180613; CA 2556128 A1 20050825; DK 1717330 T3 20180924; JP WO2005078148 A1 20071018; WO 2005078148 A1 20050825
DOCDB simple family (application)
EP 05709298 A 20050125; CA 2556128 A 20050125; DK 05709298 T 20050125; JP 2005000892 W 20050125; JP 2005517917 A 20050125