Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1996-10-10
2000-08-08
Ip, Sikyin
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148601, 148602, 148603, 164476, 164477, C21D 109
Patent
active
06099665&
ABSTRACT:
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.
Arai Takashi
Ishimaru Eiichiro
Nohara Yoshikatsu
Oka Hideki
Shoda Shunji
Ip Sikyin
Nippon Steel Corporation
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