Abstract: A length from a lower end position of the detection head (11) to a measurement lower limit of the detection head (11) is divided by height positions separated with a predetermined interval pitch. A plurality of virtual level plates (40) are prepared to be placed respectively at the height positions separated with a predetermined interval pitch such that gaps between themselves and each wide face of the mold (1) are not larger than 2 mm respectively at the height positions. Calibration is carried out while using each of the virtual level plates (40) at a corresponding one of the height positions.

Abstract: 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.

Abstract: 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 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.

Abstract: 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.

Abstract: 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 ? 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.

Abstract: 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 ? 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present invention provides a manufacturing method for a continuously cast product of steel comprising 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 comprising the steps of: cooling the product until a surface layer portion thereof is &agr; 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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).

Abstract: 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.

Abstract: 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.