Asymmetrical gas-atomizing device and method for reducing deposite bottom surface porosity
AssigneeOlin Corporation
InventorsSankaranarayanan Ashok, Thomas J. Melillo
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Abstract
A molten metal gas-atomizing spray-depositing apparatus employs an asymmetrical gas-atomizing device for generating one-sided shear forces for breaking-up and atomizing a stream of molten metal into metal particles in a divergent spray pattern of higher mass density at an upstream leading peripheral portion of the spray pattern, relative to the direction of movement of a substrate, than either of a center region or downstream trailing peripheral region of the pattern.
Claims19
In a molten metal gas-atomizing spray-depositing apparatus, the combination comprising:
- (a) means for producing a stream of molten metal;
- (b) means for asymmetricaly atomizing the molten metal stream into a divergent spray pattern of metal particles having a central region and leading and trailing peripheral regions on opposite sides of the center region such that the metal particles in the spray pattern at said leading peripheral region are of higher mass density than at said center and trailing peripheral regions;
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- (c) means movable relatively to said spray pattern and having an area therein for receiving a deposit of the metal particles, said deposit receiving area being oriented relative to said spray pattern to initially receive the metal particles of higher mass density in the leading peripheral portion thereof.
In a molten metal gas-atomizing spray-depositing apparatus, the combination comprising:
- (a) means for producing a stream of molten metal;
- (b) means for asymmetrically gas-atomizing the molten metal stream into a divergent spray pattern of metal particles having a central region and leading and trailing peripheral regions on opposite sides of the center region such that the metal particles in the spray pattern at said leading peripheral region are of higher mass density than at said center and trailing peripheral regions, said asymmetrical atomizing means including at least one gas-atomizing jet disposed at one side only of the molten metal stream;
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- (c) means movable along an endless path and having an area thereon for receiving a deposit of the metal particles in said spray pattern thereof, said deposit-receiving area of said movable means being oriented relative to said spray pattern to initially receive the metal particles of higher mass density in said leading peripheral portion thereof whereby a bottom surface of the deposit has reduced porosity.
In a molten metal gas-atomizing spray-depositing method, the combination comprising the steps of:
- (a) producing a stream of molten metal;
- (b) asymmetrically atomizing the molten metal stream into a divergent spray pattern of metal particles having a central region and leading and trailing peripheral regions on opposite sides of the center region such that the metal particles in the spray pattern at said leading peripheral region are of higher mass density than at said center and trailing peripheral regions;
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- (c) moving a substrate relative to said spray pattern for receiving a deposit of the metal particles, said substrate being oriented relative to said spray pattern to initially receive the metal particles of higher mass density in the leading edge thereof.
Dependencies are inferred from the claim text.