Reduction casting method
AssigneeNissin Kogyo Co., Ltd.
InventorKeisuke Ban
Life of this patent
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Abstract
In a reduction casting method in which casting is performed while an oxide film formed on a surface of the molten metal is reduced, after an inside of a cavity of a molding die is allowed to be in a non-oxidizing atmosphere, a reducing substance having a stronger reducing property than a metal of the molten metal has is allowed to act on the molten metal whereupon casting is performed while the oxide film formed on the surface of the molten metal is reduced.
Claims35
A reduction casting method for performing casting while an oxide film formed on a surface of molten metal is reduced, comprising:
- allowing an inside of a cavity of a molding die to be in a non-oxidizing atmosphere;
- allowing a reducing substance in a non-oxidizing atmosphere in a heated receptacle to be transferred to the inside of the cavity, the reducing substance having a stronger reducing property than a metal of said molten metal has to act on them molten metal;
- providing a non-active carrier gas into the heated receptacle to transfer the reducing substance from the heated receptacle to the inside of the cavity;
- and
- performing casting while the oxide film formed on the surface of the molten metal is reduced.
A reduction casting method for performing casting while an oxide film formed on a surface of molten metal is reduced, comprising:
- allowing a reducing substance in a heated receptacle in a non-oxidizing atmosphere to be transferred to an inside of a cavity of a molding die;
- providing a carrier gas, which does not react with the reducing substance, into the heated receptacle to transfer the reducing substance from the heated receptacle to the inside of the cavity;
- and
- performing casting while the oxide film formed on the surface of the molten metal is reduced.
A reduction casting method for performing casting while an oxide film formed on a surface of molten metal is reduced comprising:
- providing a stable reducing substance in a heated receptacle prior to being transferred to an inside of a cavity of a molding die;
- providing a carrier gas, which does not react with the stable reducing substance, into the heated receptacle to transfer the stable reducing substance from the heated receptacle to the inside of the cavity;
- and
- performing casting while the oxide filmed formed on the surface of the molten metal is reduced by the stable reducing substance in the cavity.
Dependencies are inferred from the claim text.