Nippon Steel Corporation

Yoshikatsu Nohara

Shunji Shoda

Takashi Arai

Hideki Oka

Toshiyuki Suehiro

Tetsurou Takeshita

Eiichiro Ishimaru

Shinichi Teraoka

Shin-ichi Teraoka

Eiichirou Ishimaru

This invention aims at producing a cold rolled thin sheet having excellent surface quality from a cast strip of a Cr--Ni type stainless steel cast strip by a thin casting method. The production method of the invention comprises the steps of continuously casting a Cr--Ni type stainless steel to a cast strip having a thickness of not greater than 10 mm by using a continuous casting machine the cast mold wall surface of which moves in synchronism with the cast strip; hot rolling the resulting cast strip at a temperature within the range of 900 to 1,200.degree. C. at a reduction ratio of 10 to 50%; carrying out, subsequently, heat-treatment at a temperature within the range of 1,200 to 900.degree. C. for at least 5 seconds; coiling the hot rolled cast strip at a temperature not higher than 600.degree. C.; descaling the rolled cast strip; cold rolling the cast strip; conducting annealing, pickling or bright annealing; and conducting skin pass rolling, whenever necessary.

Method for producing Cr-Ni type stainless steel thin sheet having

A metallic coil production system by providing a cooler downstream of a heat-treating furnace in a line of continuous casting of a thin strip-like slab, hot rolling, and heat treatment and providing, downstream of the cooler, a pickling device, a trimmer, a heat-treating device, a shear, and a coiler. The apparatus is constructed so that a pickling line, a trimmer line, and a shear line after the line of continuous casting of a thin strip-like slab, hot rolling, and heat treatment can be switched, permitting the lines to be operated in a continuous or discontinuous (independent) manner.

System for producing continuously metallic coil

Apparatus for producing strip of stainless steel

Process for producing continuously metallic coil

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Futtsu, Japan

Yoshikatsu Nohara