Nippon Steel Corporation

Masahiro Ito

Fumio Tanaka

Toshio Akagi

Jiro Tominaga

Wataru Murata

Shuji Naito

Sumitada Kakimoto

Wataru Shinada

Michiaki Sakakibara

Akihiro Senda

Scrap containing copper is discriminated from iron scrap after being pulverized by imaging iron scrap using a color TV camera, treating RGB signals processed by each of the points in the image as a color vector, and discriminating scrap containing copper from iron scrap when the saturation value of the color vector is larger than a predetermined value and the hue angle of the color vector lies within a predetermined range.

Method of automatically discriminating and separating scraps containing

Method for direct heat treating austenitic stainless steel wire rod wherein a hot rolled austenitic stainless steel wire rod is rendered to finish the final finishing stand of a hot rolling mill at a temperature zone in the range of solution heat treatment, then the temperature zone of said solution heat treatment is so maintained that the austenitic crystal grain size is to be less than 7.0, and subsequently said wire rod is quenched to a temperature where no chromium carbide is precipitated at a cooling rate where no chromium carbide is precipitated.

Method for direct heat treating austenitic stainless steel wire rod

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Futtsu, Japan

Masahiro Ito