Nkk Corporation

Ishikawajima-harima Jukogyo Kabushiki Kaisha

Fujitsu Corporation

Nippon Kokan Kabushiki Kaisha

Masayuki Nakada

Makoto Suzuki

Shiro Osada

Yukinori Iizuka

Yutaka Tsuchida

Nobuhisa Hasebe

Toyoji Sawada

Shuzo Takahashi

Koichi Tsutsumi

Yutaka Awajiya

Takeo Yamada

Hisahiko Fukase

Toshio Ishii

Satoshi Otsuka

Shunichi Sugiyama

Yasunori Yoshie

Tomoyuki Yamada

Motonobu Sato

Kazuo Sukegawa

Hisashi Sato

Akichika Ozeki

Yoshikazu Arisaka

Hiroshi Nakadai

Hiroaki Miyahara

Jun Kubota

Hideto Takasugi

Yasushi Kaneda

Toshio Sato

Tsutomu Tatematsu

Kentaro Mori

Yuichi Yamaoka

Takashi Oosako

Junichi Monda

Yoshimitsu Isobe

Noriko Kubo

Kengi Togashi

Masami Komatsu

A redundant fuse is provided with a redundant length, here a winding structure, at one end thereof, here at a vicinity of a second wire side to which a high voltage (Vcc) is impressed. A disconnected portion is provided between the other end side of the redundant fuse, here a second wire side which is on the ground potential (GND) and the winding structure.

Semiconductor device and manufacturing method thereof

A manufacturing method for a continuously cast product of steel includes the steps of detecting a position of a crater end of the product by a method for measuring a solidification state of the continuously cast product using a sensor arranged so as to be in non-contact with the product, and controlling at least one condition selected from the conditions of the casting speed and the quantity of secondary cooling water based on the detected position of crater end. The method for measuring a solidification state of continuously cast product includes the steps of transmitting transverse waves of burst-like electromagnetic ultrasonic waves, in which at least one selected from frequency, amplitude, and phase is modulated within a pulse width that has a magnitude of 50 to 150% of the maximum time width not exceeding a time of flight for propagating in said product, to said product as a transmitting signal, receiving a signal after said transmitting signal propagates in said product as a receiving signal, and judging the solidification state of said product by performing a correlation operation of said receiving signal by using a reference signal of a waveform that is the same as or similar to said transmitting signal.

Manufacturing method for continuously cast product of steel

A manufacturing method for a continuously cast product of steel includes the steps of detecting a position of crater end of product by a method for measuring a solidification state of continuously cast product using a sensor arranged so as to be in non-contact with the product, and controlling at least one condition selected from the conditions of the casting speed and the quantity of secondary cooling water based on the detected position of crater end. The method for measuring a solidification state of continuously cast product includes the steps of cooling the product until a surface layer portion thereof is &#x3b1; transformed, transmitting transverse waves of electromagnetic ultrasonic waves to the cooled product, receiving the signal after the transmitting signal propagates in the product, and judging the solidification state of the product based on the received signal.

The method for controlling flow pattern of molten steel in continuous casting, comprises the steps of: (a) continuously casting a molten steel injected through an immersion nozzle; (b) measuring temperatures of a copper plate on longer side of the mold in width direction thereof at plurality of points; (c) detecting a flow pattern of the molten steel in the mold based on the time-sequential variations of temperatures of the copper plate at individual measurement points; and (d) controlling the flow pattern to establish a specified pattern on the basis of the detected result. The temperatures of mold copper plate are measured by plurality of temperature measurement elements buried in the rear face of the mold copper plate for continuous casting. The temperature measurement elements are arranged in a range of from 10 to 135 mm distant from the melt surface in the mold in the slab-drawing direction.

Method for estimating and controlling flow pattern of molten steel in continuous casting and apparatus therefor

A high-strength protective member made of tungsten is disposed under a disconnecting point of a fuse. This protective member is formed simultaneously with formation of a via contact portion which connects the fuse with wiring, for example.

Semiconductor device provided with fuse and method of disconnecting fuse

A temperature measuring device includes an optical fiber; a metallic protective tube for covering the optical fiber to form a metal-covered optical fiber; and a radiation thermometer connected to the metal-covered optical fiber. A heat insulation coating may be added to cover the metallic protective tube.

Temperature measuring device

A method for continuous casting of steel comprises the steps of feeding molten steel to cooling device for cooling molten steel by use of feeding device for feeding molten steel; cooling fed molten steel by the cooling device; generating a high-frequency magnetic field near a zone where the feeding device, the cooling device and molten steel contact each other; and converging the high-frequency magnetic field on the zone where the feeding device, the cooling device and molten steel contact each other. Further, an apparatus for continuous casting of steel comprises feeding device for feeding molten steel; cooling device for cooling molten steel fed by the feeding device; generating device for generating a high-frequency magnetic field near a zone where the feeding device, the cooling device and molten steel contact each other; and converging device for converging the magnetic field on the zone where the feeding device, the cooling device and molten steel contact each other.

Method for continuous casting of steel and apparatus therefor

A molten metal pouring nozzle for a continuous casting machine having an endless-travelling type mold, wherein the endless-travelling type mold is formed with two pairs of opposing wall members endlessly travelling in the same direction and at the same speed, and one end of the pouring nozzle is connected to a tundish for receiving molten metal, and the other end of the pouring nozzle is inserted into the mold. The molten metal pouring nozzle of the present invention comprises a nozzle body made of a refractory and a flow regulator made of a refractory. The nozzle body (14, 20) has a bore (1a, 3a), through which molten metal flows, along the axial line thereof, and the sectional area of the downstream end portion of the bore (1a, 3a) becomes gradually larger toward the downstream end thereof. The flow regulator (15, 18) is arranged at the center of the downstream end portion of the bore (1a, 3a) of the nozzle body (14, 20). The flow regulator (15, 18) forms, in cooperation with the bore (1a, 3a), a path for molten metal, by which molten metal flowing through the bore (1a, 3a) impinges against the inner surface of the mold, near the downstream end of the nozzle body (14, 20).

Molten metal pouring nozzle for continuous casting machine having

Position sensors at an inlet of a mold cavity defined by upper and lower block molds detect distances from the passing upper and lower block molds. In response to outputs from the position sensors, any deflection of the leading end of the tundish nozzle, which can be inclined with respect to the melt outlet of a tundish, toward the upper or lower block molds defining the mold cavity is detected by a control device to generate a drive signal which is delivered to a hydraulic cylinder adapted to incline the tundish nozzle by extending or retracting the rod thereof, whereby the gaps between the leading end of the tundish nozzle and the upper and lower block molds are maintained uniform.

Pouring apparatus for moving-mold type continuous casting machine

A dummy nozzle is used for alignment of a pouring nozzle upon insertion of the pouring nozzle in communication with a tundish into a mold cavity of an endless track type moving-block mold continuous casting machine.

Apparatus for aligning pouring nozzle in continuous casting installation

Growing community of inventors

Kawasaki, Japan

Masayuki Nakada