Method of graphitizing cast iron
First Claim
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1. THE METHOD FOR PRODUCING A GRAY IRON CASTING HAVING IMPROVED METALLURGICAL QUALITY WHICH COMPRISES ESTABLISHING A BATH OF CAST IRON HAVING SUCH A COMPOSITION THAT IT TENDS TO FREEZE AS A WHITE CAST IRON CONTAINING CARBIDES WHEN POURED INTO A MOLD, CASTING METAL FROM SAID BATH INTO A MOLD, AND GRAPHITIZING SAID METAL BY APPLYING VIBRATION AT A FREQUENCY OF AT LEAST ABOUT 50 CYCLES PER MINUTE TO SAID METAL DURING THE SOLIDIFICATION THEREOF TO FORM A CASTING HAVING SUBSTANTIALLY NO RETAINED CARBIDES AND HAVING IMPROVED METALLURGICAL QUALITY.
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1 Claim
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1. THE METHOD FOR PRODUCING A GRAY IRON CASTING HAVING IMPROVED METALLURGICAL QUALITY WHICH COMPRISES ESTABLISHING A BATH OF CAST IRON HAVING SUCH A COMPOSITION THAT IT TENDS TO FREEZE AS A WHITE CAST IRON CONTAINING CARBIDES WHEN POURED INTO A MOLD, CASTING METAL FROM SAID BATH INTO A MOLD, AND GRAPHITIZING SAID METAL BY APPLYING VIBRATION AT A FREQUENCY OF AT LEAST ABOUT 50 CYCLES PER MINUTE TO SAID METAL DURING THE SOLIDIFICATION THEREOF TO FORM A CASTING HAVING SUBSTANTIALLY NO RETAINED CARBIDES AND HAVING IMPROVED METALLURGICAL QUALITY.
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Current AssigneeDixon Ronald H T, John H. Gittus
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Original AssigneeDixon Ronald H T, John H. Gittus
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InventorsDIXON RONALD H T, Gittus, John H.
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Application NumberUS03/731,740Time in Patent Office1,043 DaysField of SearchUS Class Current164/501CPC Class CodesC22C 37/04 containing spheroidal graphiteY10S 164/03 Centrifugal
