Preparation of spherical metal powder
First Claim
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1. METHOD OF PRODUCING SPHERICAL METAL POWDER, WHICH COMPRISES SUBJECTING MOLTEN METAL TO THE ACTION OF A HIGH VELOCITY STREAM OF EXOTHERMIC GAS CONTAINING NITROGEN AND CARBON DIOXIDE, TO DISINTEGRATE THE METAL INTO FINE PARTICLES, SAID GAS PROVIDING AVAILABLE OXYGEN IN AN AMOUNT INSUFFICIENT TO INTERFERE WITH SURFACE TENSION FORCES OF THE PARTICLES EFFECTING SPHERE FORMATION, AND PASSING SAID GAS STREAM AND THE PARTICLES OF MOLTEN METAL THROUGH A SPHERODIZING ZONE TO CAUSE SPHERE FORMATION AND SOLIDIFICATION OF THE SPHERICAL PARTICLES.
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1 Claim
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1. METHOD OF PRODUCING SPHERICAL METAL POWDER, WHICH COMPRISES SUBJECTING MOLTEN METAL TO THE ACTION OF A HIGH VELOCITY STREAM OF EXOTHERMIC GAS CONTAINING NITROGEN AND CARBON DIOXIDE, TO DISINTEGRATE THE METAL INTO FINE PARTICLES, SAID GAS PROVIDING AVAILABLE OXYGEN IN AN AMOUNT INSUFFICIENT TO INTERFERE WITH SURFACE TENSION FORCES OF THE PARTICLES EFFECTING SPHERE FORMATION, AND PASSING SAID GAS STREAM AND THE PARTICLES OF MOLTEN METAL THROUGH A SPHERODIZING ZONE TO CAUSE SPHERE FORMATION AND SOLIDIFICATION OF THE SPHERICAL PARTICLES.
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Current AssigneeFrancis B. Rethwisch, Linton D. Bylund, William P. Woosley
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Original AssigneeFrancis B. Rethwisch, Linton D. Bylund, William P. Woosley
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InventorsBylund, Linton D., Rethwisch, Francis B., Woosley, William P.
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Application NumberUS04/217,415Time in Patent Office1,587 DaysField of SearchUS Class Current75/338CPC Class CodesB22F 9/082 atomising using a fluid usi...G01N 33/2025 Gaseous constituentsY10S 75/953 Producing spheres
