Kawasaki Steel Corporation

Takuo Imai

Tetsuya Fujii

Nagayasu Bessho

Toshikazu Sakuraya

Hideo Kuguminato

Yo Ito

Yasuhiro Habu

Shinji Kojima

Toshitane Matsukawa

Kyoji Nakanishi

Toshio Fujimura

Isao Takahashi

Hideo Nakamura

Ryuichi Asaho

Fumio Kosumi

Masaaki Tsukamoto

Kenji Ito

Tatsukichi Chino

A segregation preventive or eliminative operation in a continuous casting process is performed under the following conditions:

Method and apparatus for continuous compression forging of continuously

A steel-making process in a converter, which includes using a carbon monoxide gas as an agitating gas supplied from a position lower than molten metal bath level.

Steel-making process in converter

A tuyere for blowing an agitating gas into molten steel is arranged in the bottom of an oxygen top-blown converter in order to improve the refining effect of molten steel and has a ratio of blow sectional area S (cm.sup.2) to inner peripheral length L (cm) of not more than 0.17, preferably not more than 0.125.

Bottom tuyeres in an oxygen top-blown converter

Steel sheets having an excellent enamelability are produced by adjusting the carbon, silicon, manganese, aluminum, oxygen and boron contents in a molten steel to be not more than 0.020% of carbon, not more than 0.03% of silicon, not more than 0.50% of manganese, not more than 0.010% of aluminum, nor more than 0.050% of oxygen, boron within a range of 0.003-0.020% being in such an amount B(%).times.0(%) of more than 1.times.10.sup..sup.-5 and the remainder being inevitable impurities and iron, and hot rolling the resulting steel, cold rolling the steel and subjecting to a recrystallization annealing in a conventional manner.

Cold rolled steel sheets having an excellent enamelability and a method

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Okayama, Japan

Takuo Imai