Methods of producing leaded steel
Abstract
Abstract LEAD ADDITIONS TO STEEL ARE MADE AND AN IMPROVED LEADED STEEL PRODUCT IS OBTAINED BY EFFECTIVELY UTILIZING THE SIGNIFICANT SOLUBILITY OF LEAD IN STEEL AT TEMPERATURES ABOVE THE LIQUIDUS TEMPERATURE OF THE STEEL. THIS IS ACCOMPLISHED BY CONTROL OF PROCESS CONDITIONS, INCLUDING ADDING THE LEAD TO THE STEEL IN A VESSEL SEPARATE FROM THE CASTING MOLD, ALLOWING A MINIMUM TIME BETWEEN THE ADDITION OF THE LEAD AND THE POURING AND CASTING OF THE LEADED STEEL, THE USE OF SPECIFIC AMOUNTS OF LEAD BASED UPON A TARGET PERCENTAGE OF LEAD TO BE OBTAINED IN THE CAST STEEL, WHICH TARGET PERCENTAGE DOES NOT EXCEED THE SOLUBILITY LEVEL OF LEAD IN THE STEEL, AND THE ADDITION OF THE LEAD WHEN THE TEMPERATURE OF THE STEEL IS ABOVE THE LIQUIDUS TEMPERATURE BY AT LEAST A MINIMUM AMOUNT. THE LEAD CONTENT IN STEEL CAST CONTINUOUSLY OR INTO INGOTS IN ACCORDANCE WITH THIS PROCES IS UNIFORMLY AND FINELY DISPERSED AND THE STEEL IS CHARACTERIZED BY AN ABSENCE OF MACROSEGREGATION OF LEAD.
Inventors
- 👤 Donald F North Jr
- 👤 Jerry D Thomas
- 👤 Gerald W Worth
Bibliographic Details
Claims Analysis
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