Melting and casting of Raney nickel alloy. Report of investigations 1977. [42% Ni--58% Al]
The melting, casting, and welding of the Raney nickel alloy (42% Ni-58% Al), a methanation catalyst useful in coal gasification, was investigated by the Bureau of Mines. Melting was done in graphite crucibles by heating aluminum and adding nickel using a cryolite slag cover. Casting conditions were found optimum when the melt temperature ranged from 1,125 to 1,200C and mold temperature from ambient to 250C. Suitable mold materials were found to be quartz, Vycor, olivene, and zircon. Welding of the alloy can be accomplished using tungsten inert gas process. Tensile strength of the alloy, in the as-cast condition, was found to be 2,000 psi with an impact strength of less than 1 foot-pound. The coefficient of thermal expansion was determined to be 0.0000184/c for as-cast material and 0.0000147/c after heat treatment.
- Research Organization:
- Bureau of Mines, Albany, OR (USA). Albany Metallurgy Research Center
- OSTI ID:
- 7317292
- Report Number(s):
- PB-265928; BM-RI-8210
- Country of Publication:
- United States
- Language:
- English
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Certain aspects of the melting, casting and welding of Ni{sub 3}Al alloys
Related Subjects
01 COAL, LIGNITE, AND PEAT
ALUMINIUM BASE ALLOYS
CASTING
GAS TUNGSTEN-ARC WELDING
IMPACT STRENGTH
MELTING
TENSILE PROPERTIES
THERMAL EXPANSION
NICKEL ALLOYS
CASTING MOLDS
COAL GASIFICATION
MICROSTRUCTURE
VERY HIGH TEMPERATURE
ALLOYS
ALUMINIUM ALLOYS
ARC WELDING
CRYSTAL STRUCTURE
EXPANSION
FABRICATION
GASIFICATION
JOINING
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
THERMOCHEMICAL PROCESSES
WELDING
360101* - Metals & Alloys- Preparation & Fabrication
360103 - Metals & Alloys- Mechanical Properties
010404 - Coal
Lignite
& Peat- Gasification