| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.26 ( June 1992 ) Artificial Intelligence and Wire Rods and Steel Bars ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Manufacturing Techniques for Wire Rod and Bar Steel at Kawasaki Steel Corporation Eisuke Yamanaka, Hidenori Kondo, Shinya Nishijima, Minoru Fukuda, Kiyoji Ino, Masuhiko Doi |
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Synopsis : As part of the development of a high-productivity manufacturing system for high-grade wire rod and bar steels, basic techniques were improved, automation and labor saving were promoted, and a comprehensive quality assurance system was established. The reheating furnace was provided with a full slipless handling system and a uniform low temperature heating capability, and one-man operation was realized. A four-stand compact mill and tension control system was introduced at the Bar Mill. At the Wire Rod Mill, a high-rigidity mill and retarded Stelmor were adopted, greatly improving the temperature control function. The quality assurance system includes a hot eddy current flaw detector and a full-cross section ultrasonic flaw detector for billets. As a result, a high accuracy of }0.08 mm over the full length of materials has been obtained with close tolerance bar steel, supporting a first-class acceptance ratio of 98%. The use of controlled rolling has also made it possible to manufacture direct softened steel rod, which requires no annealing. |
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