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US 7,396,424 B2Granted
Method of manufacturing a hard precious metal alloy member
OwnerKazuo Ogasainventor
Life of this patent
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Abstract
A method of manufacturing a hard precious metal alloy member comprising casting a material consisting essentially of a gold alloy, which has a gold content of from 37.50 to 98.45 wt %, and contains gadolinium in an amount of not less than 50 ppm, but less than 1,5000 ppm; subjecting the material to a solution heat treatment; and subjecting the material to an aging treatment after the solution heat treatment.
Claims10
A method of manufacturing a hard precious metal alloy member comprising the steps of:
- (a) casting a material consisting essentially of a silver alloy, which has a silver content of not less than 80.0 wt %, and contains gadolinium in an amount of not less than 50 ppm, but less than 15,000 ppm in total;
- (b) subjecting the material to a solution heat treatment;
- and
- (c) subjecting the material to an aging treatment after the solution heat treatment.
1 more element
A method of manufacturing a hard precious metal alloy member comprising the steps of:
- (a) casting a material consisting essentially of a silver alloy, which has a silver content of not less than 99.45 wt %, and contains gadolinium, and optionally at least one element selected from the group consisting of a rare-earth element other than gadolinium, an alkaline-earth element, silicon, aluminum and boron, in an amount of not less than 50 ppm, but less than 5,000 ppm in total;
- (b) subjecting the material to a solution heat treatment;
- and
- (c) subjecting the material to an aging treatment after the solution heat treatment.
1 more element
Dependencies are inferred from the claim text.