Establishment of HCR Technology at Heavy Plate Mill in Kimitsu Works, Nippon Steel Corp.

Abstract

At a Heavy Plate Mill in Kimitsu Works, HCR operation has been introduced since July 1982.
Since start-up, the production management between caster and mill was made more suitable for the HCR operation and several measures were taken to raise HCR ratio and the slab temperature, such as decrease of slab surface cracks, building of slab heat insulator, optimized scheduling system and so on.
As a result, the HCR ratio and temperature is now more than 75% and 680°C.
In this paper, we describe the concepts, contents and effects of these measures.