Title:
METHOD FOR NITRIDING SURFACE OF ALUMINUM MATERIAL AND ASSISTANT FOR NITRIDING
Document Type and Number:
WIPO Patent Application WO/1997/013002
Kind Code:
A1
Abstract:
A nitriding method for forming a relatively thick nitride layer on the surface of a silicon-containing aluminum material, and an assistant for nitriding. A nitriding assistant comprising as a main ingredient aluminum containing a metal which has a high strength of bonding to oxygen, such as lithium or boron, and which, when present together with silicon, does not substantially form any silicide, or a nitriding assistant comprising as a main ingredient an aluminum-magnesium-copper alloy or a magnesium-zinc-copper alloy is brought into contact with an aluminum material while heat treating the same in the presence of nitrogen gas. This enables a thick nitride layer to be easily formed also on the surface of a silicon-containing aluminum alloy material. This method is best suited for nitriding the surface of an aluminum-silicon alloy having an excellent castability.
Inventors:
MIURA HIROHISA (JP)
YAMADA YASUHIRO (JP)
KATOH HARUZO (JP)
YAMADA YASUHIRO (JP)
KATOH HARUZO (JP)
Application Number:
PCT/JP1996/002912
Publication Date:
April 10, 1997
Filing Date:
October 02, 1996
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
TOYO ALUMINIUM KK (JP)
MIURA HIROHISA (JP)
YAMADA YASUHIRO (JP)
KATOH HARUZO (JP)
TOYO ALUMINIUM KK (JP)
MIURA HIROHISA (JP)
YAMADA YASUHIRO (JP)
KATOH HARUZO (JP)
International Classes:
C23C8/24; (IPC1-7): C23C8/24
Foreign References:
| JPH07166321A | 1995-06-27 | |||
| JPH04136116A | 1992-05-11 |
Other References:
See also references of EP 0795621A4
Download PDF: