| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.40 ( May 1999 ) Steinless Steel and Steel Platel ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Heavy Section Steel Plates
with Improved Internal Properties through
Forging and Plate Rolling Process Using Continuous
Casting Slabs Kiyomi Araki, Takeshi Kohriyama, Motoshi Nakamura |
| Synopsis: Heavy steel plates with thickness of over 150 mm have usually been manufactured by using materials obtained through ingot casting process, in consideration of the internal properties. The possibility of applying a forging process before plate rolling was investigated to secure both homogeneous and sound internal properties by using continuous casting slabs, instead of ingot casting slabs. When a certain annihilation of center porosities is considered, a forging method with reduction in widthwise direction before reduction in thicknesswise direction of slabs was found to be very effective. As a result of the application of this process for TS: 400 MPa class steel, it is concluded that excellent internal properties can be obtained in the manufacture of heavy steel plates with thickness of up to 240 mm (reduction ratio: 1.3). |
| TextiPDF: 6P/258kbj |