Published March 27, 1984 | Version v1
Patent Metadata-only

Method of heat treating NICRALY alloys for use as ceramic kiln and furnace hardware

Creators

Description

This invention relates to components of ceramic kiln and furnace hardware made of NICRALY alloys. Disclosed is a method of heat treating NICRALY alloys to obtain a uniform film of desired alumina (Al2O3) on the surface of the alloys. The gist of the invention resides in the control of the critical relationship between the temperature and the partial pressure of oxygen in the oxygen potential controlled atmosphere during the heat treatment. Optimum results are obtained when the temperature is about 21000 F. and the dew point is about -300 F. in hydrogen for about one hour

Availability note (English)

U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50.

Additional details

Publishing Information

Imprint Pagination
v p.
IPC:
Int. Cl. C22F 01/00.
IPC
Int. Cl. C22F 01/00.
Patent number
US patent document 4,439,248/A/

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
16029989
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
ALUMINIUM ALLOYS; CHROMIUM ALLOYS; CORUNDUM; DEPOSITION; FILMS; FURNACES; HEAT RESISTING ALLOYS; HEAT TREATMENTS; NICKEL BASE ALLOYS; OXIDATION; SURFACE TREATMENTS; THERMAL CONDUCTIVITY; YTTRIUM ALLOYS
Descriptors DEC
ALLOYS; CHEMICAL REACTIONS; MINERALS; NICKEL ALLOYS; OXIDE MINERALS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES

Optional Information

Notes
PAT-APPL-345260.