EP 0808914 A1 19971126 - Member for use in contact with molten nonferrous metals
Title (en)
Member for use in contact with molten nonferrous metals
Title (de)
Tauchteil für Schmelzbad aus Nichteisenmetallen
Title (fr)
Elément d'immersion pour bain de métaux non-ferreux
Publication
Application
Priority
JP 16659296 A 19960522
Abstract (en)
The member for use in contact with molten nonferrous metals comprises a substrate made of an Fe-base alloy and a dense surface layer composed of an oxide or oxynitride. The oxide or oxynitride surface layer is formed by preheating the substrate in a non-oxidizing atmosphere such as a nitrogen gas, and then heat-treating it in an oxidizing or oxynitriding atmosphere containing steam such as a mixture of the air and an overheated steam, or in an atmosphere generating oxygen and steam such as a mixed gas comprising a hydrogen gas and a carbon dioxide gas, at a temperature of 650 DEG C and 1100 DEG C.
IPC 1-7
IPC 8 full level
CPC (source: EP)
C23C 8/18 (2013.01)
Citation (search report)
- [A] US 3611530 A 19711012 - MAYHEW JOHN T
- [A] US 2727842 A 19551220 - OTTO VERMIJ MAX
- [AX] GB 2092621 A 19820818 - MASCHF AUGSBURG NUERNBERG AG
- [A] US 2236728 A 19410401 - GIVEN FRED H
- [A] PATENT ABSTRACTS OF JAPAN vol. 011, no. 273 (C - 445) 4 September 1987 (1987-09-04)
- [A] PATENT ABSTRACTS OF JAPAN vol. 095, no. 005 30 June 1995 (1995-06-30)
- [A] PATENT ABSTRACTS OF JAPAN vol. 016, no. 071 (C - 0913) 21 February 1992 (1992-02-21)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 97108034 A 19970516