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Improvement of Continuously Cast Slab Surface and Performance of Rolling the Slab Free from Surface Conditioning

1981; The Iron and Steel Institute of Japan; Volume: 67; Issue: 8 Linguagem: Inglês

10.2355/tetsutohagane1955.67.8_1229

1883-2954

Minoru Kitamura, Tosiyuki SOEJIMA, Sinzi KOYAMA, Yosihiro MATUDA, Junji ABU, Yosikazu NIMIYA, Yasutaka YAO,

Metal Alloys Wear and Properties

Refinement in operating practice and technical development such as degassing, Ar gas shrouding, mould fluxes, tundish refractories, slab surface temperature control in the secondary cooling zone and so on, made it possible to improve slab surface quality and hence reheat the slab without surface conditioning.Recently, 80% of the slabs for plates and 50% for sheets are charged directly into the reheating furnaces by this process, with excellent results. On the basis of this development, continuous casting of high grade steels such as API-70 and deep drawing quality steels have been made possible.