Nippon Steel Corporation

Shin-ichi Teraoka

Eiichiro Ishimaru

Takashi Arai

Hideki Oka

Toshiyuki Suehiro

Tetsurou Takeshita

Shunji Shoda

Yoshikatsu Nohara

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 low anisotropic Cr--Ni-based stainless steel hot-rolled sheet, which has texture with (100), (110), (111), (311) and (211) ND plane intensity from 0.5 to 1.5 in an inverse pole figure measured for a 1/4 section of the sheet thickness, and which is produced by continuously casting molten Cr--Ni-based stainless steel into a cast strip with a thickness of 1.5 mm to 6 mm using a continuous casting machine wherein the mold walls move in synchronization with the cast strip, hot rolling it at a hot rolling temperature of 950-1,150.degree. C. and a reduction of 25 to 35% within 60 seconds after the cast strip has left the mold, and then performing heat treatment wherein the strip is held for 5 to 60 seconds in a temperature range of 950-1,200.degree. C.; as well as a process for its production.

Low anisotropic Cr-Ni-based hot rolled stainless steel sheet and process

Hot rolled Cr-Ni stainless steel plate of low anisotropy and process for

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Hikari, Japan

Shin-ichi Teraoka