Kawasaki Steel Corporation

Hitachi, Ltd.

Sakai Chemical Industry Co., Ltd.

Kawasaki Steel Company

Yasuhiro Habu

Hakaru Nakato

Tsutomu Nozaki

Tetsuya Fujii

Nagayasu Bessho

Toshikazu Sakuraya

Tomoaki Kimura

Seiji Itoyama

Takao Koshikawa

Hideo Nakamura

Tsunehiro Ueda

Fumitaka Shimokawa

Shuji Takeuchi

Yoshisato Kiyota

Yoshiei Kato

Hiroshi Ohtsubo

Minoru Nitta

Toshihiko Emi

Hiromitsu Yamanaka

Takuo Imai

Katsuo Kinoshita

Toshio Watanabe

Yutaka Yoshii

Masanori Kodama

Hiromu Oka

Hiroaki Ohnuma

Nobuo Harada

Shigeru Ohmiya

Yukio Makiishi

Yoshimitsu Yoshida

Hideaki Kishimoto

There is provided alloy steel powders for the injection molding use manufactured by the atomizing method which are characterized by their substantially spherical particle shape and average particle diameters of 20 microns or less, a compound for the injection molding use which contains the alloy steel powders and one or more organic binders, a process for manufacturing sintered materials in performing injection molding of compound and subsequently debinding the obtained injection molded part followed by sintering the debound part, at least the first stage of the sintering step is performed in reduced pressure atmosphere, and the sintered material having a relative density ratio of 92% or more.

Alloy steel powders for injection molding use, their compounds and a

A method and apparatus for continuous casting of an elongated thin metal strip achieves substantially high yield without allowing break-out or sticking. The method for casting a continuous elongated metal strip includes a step of driving endless belts at a varying speed so as to apply jerks to the slightly and half-solidified metal that release the metal from the surfaces of the stationary side walls. Applying jerks to the casting chamber by varying the driving speed of the endless belt ensures that the solidifying metal will travel smoothly and thus ensures a high manufacturing yield.

Apparatus for casting endless strip

A mold additive for use in continuous casting, which includes a base material having a chemical composition of CaO--BaO--SiO.sub.2 --F system, and contains 2-15% by weight in total of at least one carbonate of alkali and alkaline earth metals, 2-30% by weight in total of at least one fluoride of alkali and alkaline earth metals and 0.2-10% by weight of carbon, and, if necessary, 2-10% by weight in total of at least one oxide of Fe, Mn and Ni, and has a solidification temperature of not more than 900.degree. C. and a viscosity at 1,300.degree. C. of not more than 3 poises. The base material has a weight ratio of (CaO+BaO)/SiO.sub.2 of 0.6-2.5 and contains not less than 2% by weight of BaO and 2-15% by weight of F.

Mold additives for use in continuous casting

Method and apparatus for casting endless strip

Continuous casting apparatus for the production of cast sheets

A cooling pad for use in a continuous casting apparatus for the production of cast sheets. The pad is provided with plural water supply and discharge holes satisfying the particular relations on the arrangement thereof. By using such a cooling pad, a filmy cooling water flow is uniformly and stably formed in the casting.

Cooling pad for use in a continuous casting apparatus for the production

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 process for producing an extremely low carbon steel in a top- and bottom-blown converter. The process is characterized in top-blowing a mixed gas of oxygen gas and an inert gas onto a molten steel in the top- and bottom-blown converter. The mixed gas is blown through a top-blowing lance at the final decarburization stage, while a gas (selected from a group consisting of an inert gas, oxygen gas and a mixture of oxygen and an inert gas) is bottom-blown into the molten steel in the converter.

Steelmaking of an extremely low carbon steel in a converter

Method of heating a molten steel in a tundish for a continuous casting

A mold additive for use in the continuous casting is disclosed, which comprises a base material for slag having a chemical composition of CaO--SiO.sub.2 --Al.sub.2 O.sub.3 system, a flux and a carbonaceous aggregate. The mold additive contains 0.5-2.0% by weight of carbon black and 1-4% by weight of activated carbon with an average particle size of not more than 10 .mu.m as the carbonaceous aggregate, and has a bulk density of not more than 0.9 g/cm.sup.3.

Growing community of inventors

Chiba, Japan

Yasuhiro Habu