B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/188
B22D 27/20 (2006.01) B22D 25/06 (2006.01) B22D 46/00 (2006.01) C21C 5/28 (2006.01) C21D 9/573 (2006.01) C22C 38/24 (2006.01)
Patent
CA 2151350
A method and apparatus are provided for producing rods having a desired tensile strength from a rod manufacturing process set to an optimal operating condition. Initially, the rod manufacturing process is set in an optimal condition to produce rods at a maximum rate, while optimizing the mechanical properties therein. Raw materials are melted and a "heat of steel" representing one lot is poured into a ladle which is sampled to determine its chemical composition. The percentage content of each element is utilized within an empirical model modelling the rod manufacturing process to predict the tensile strength of rods. The empirical model is again utilized to determine the amount by which a control element must be varied to adjust the predicted tensile strength to the desired tensile strength. The control element represents an element, such as, carbon which significantly impacts the tensile strength of the rod. The predicted level of the control element necessary to achieve the target tensile strength is referred to as the "floating aim level" thereof. If the floating aim level exceeds a maximum accepted level for the control element the empirical model is again used to determine the necessary level of a second control element. Next, the heat of steel is trimmed to provide a lot having the target tensile strength.
Glodowski Robert J.
Wilson Allyen E. III
Georgetown Steel Company Llc
Smart & Biggar
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