| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.25 ( September 1991 ) Special Issue on 'H-Shapes with Fixed Outer Dimension' and 'Steel Pipe' ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of a Process for Manufacturing Rolled H-Shapes with Light-Webs Hiroshi Yoshida, Nobuyuki Kondou, Hironori Miura, Takanori Okui, Takafumi Hashimoto, Mikio Kouno |
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Synopsis : A process for manufacturing light-web rolled H-shape steels has been investigated. The results obtained are as follow: (1) To realize the light web, it is necessary to reduce the residual stress for preventing the web from buckling and not to decrease the web rolling temperature for preventing the material quality from worsening; (2) to reduce the residual stress, it is effective to cool the flange by water between the roughing and the finishing universal mills and also after the finishing universal mill; and (3) not to decrease the web temperature, it is effective to carry out tandem rolling by roughing universal mills. Based on the above study, Kawasaki Steel Corp. has installed the water-cooling equipment and also revamped a roughing universal mill to the two-stand tandem universal rolling mills at the Wide Flange Beam Plant. As a result, it has become possible, as expected, to manufacture the light-web rolled H-shape steels. |
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