Continuous casting method for metallic amorphous strips
First Claim
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1. A method of forming continuous strip of amorphous metal from a molten alloy capable of forming an amorphous structure comprising:
- a. forcing the molten alloy under pressure through a slotted nozzle positioned generally perpendicular to the direction of movement of a chill surface and located in close proximity to the chill surface to provide a gap of from about 0.03 to about 1 millimeter between said nozzle and the chill surface;
b. advancing the chill surface, at a predetermined speed; and
c. quenching the molten metal in contact with the chill surface at a rapid rate to effect solidification into a continuous amorphous metal strip.
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Abstract
Continuous metal strips are formed by forcing molten metal onto the surface of a moving chill body under pressure through a slotted nozzle located in close proximity to the surface of the chill body. Critical selection of nozzle dimensions, velocity of movement of the chill body surface, and gap between nozzle and chill body surface permits production of continuous polycrystalline metal strip at high speeds, and of amorphous metal strips having high isotropic strengths, heretofore unobtainable dimensions, and other isotropic physical properties such as magnetizability.
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Citations
13 Claims
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1. A method of forming continuous strip of amorphous metal from a molten alloy capable of forming an amorphous structure comprising:
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a. forcing the molten alloy under pressure through a slotted nozzle positioned generally perpendicular to the direction of movement of a chill surface and located in close proximity to the chill surface to provide a gap of from about 0.03 to about 1 millimeter between said nozzle and the chill surface; b. advancing the chill surface, at a predetermined speed; and c. quenching the molten metal in contact with the chill surface at a rapid rate to effect solidification into a continuous amorphous metal strip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. The method of forming continuous strip of amorphous metal from a molten alloy capable of forming an amorphous structure, comprising:
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(a) forcing the molten metal under pressure through a slotted nozzle onto the peripheral surface of a chill roll, wherein said nozzle is located in close proximity to said peripheral surface such that the gap between the nozzle and said peripheral surface is from about 0.03 to about 1 millimeter, wherein the nozzle has a width of from about 0.3 to about 1 millimeter, measured in the direction of rotation of the chill roll, and wherein the nozzle is positioned generally perpendicular to the direction of rotation of the chill roll; (b) rotating the chill roll at a predetermined speed to provide a peripheral velocity of from about 200 to about 2000 meters per minute; and (c) quenching the molten metal in contact with the peripheral chill roll surface at a rate of at least about 104 °
C. per second to effect solidification into a continuous amorphous strip.
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13. The method of forming continuous strip of amorphous metal from a molten alloy capable of forming an amorphous structure, comprising:
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(a) forcing the molten metal under pressure through a slotted nozzle onto the surface of an endless chill belt, wherein said nozzle is located in close proximity to said surface such that the gap between the nozzle and said surface is from about 0.03 to about 1 millimeter, wherein the nozzle has a width of from about 0.3 to 1 millimeter, measured in longitudinal direction of the belt, and wherein the nozzle is positioned generally perpendicular to the longitudinal direction of the belt; (b) advancing the belt at a predetermined speed of from about 200 to about 2000 meters per minute; and (c) quenching the molten metal in contact with the surface of the belt at a rate of at least about 104 °
C. per second to effect solidification into a continuous amorphous strip.
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Specification