Abstract: There is provided a cast strip manufacturing method including: supplying a molten steel stored in a tundish (18) to a molten steel pool portion (16) formed by a pair of rotating cooling rolls (11) and a pair of side dams via an immersion nozzle (20); and forming and growing a solidified shell on a circumferential surface of the cooling roll (11) to manufacture a cast strip (1), in which a Si additive is added to the molten steel in the tundish (18), a Si concentration of the molten steel is adjusted to be within a fixed range, and a temperature of the molten steel in the tundish (18) is controlled to be within a fixed range.

Abstract: This thin strip manufacture method is a thin strip manufacture method for manufacturing a thin strip by supplying molten steel to a molten steel pool formed by a pair of rotating cooling drums and a pair of side weirs to form and grow a solidified shell on a peripheral surface of the cooling drums, wherein a pressing force P of the pair of the cooling drums is set so that the pressing force P (kgf/mm) of the pair of cooling drums, casting thickness D (mm), and radius R (m) of the cooling drums satisfy 0.90?P×(D×R)0.5?1.30.

Abstract: A motor drive apparatus that can continue operation within the upper limit of system control even if a voltage drop of an AC power source occurs during operation of a motor used for a hoist or a crane is provided. The inverter control unit of the motor drive apparatus includes a speed reference setting means for setting the rotation speed of the motor, means for detecting a speed deviation between the output of the rotation speed detection means for detecting the rotation speed of the motor and the output of the speed reference setting means, means for controlling the output current of the inverter according to the output of the speed deviation. The speed reference setting means includes a correction circuit for correcting an external speed command given from outside.

Abstract: In this cast strip manufacturing method, in a first step, one end side and another end side in a rotation axis direction of a pair of cooling drums are pressed with a first pressure in a direction in which the cooling drums come close to each other, in a second step, the one end side and the another end side in the rotation axis direction of the cooling drums are pressed with a second pressure, which is higher than the first pressure, in the direction in which the cooling drums come close to each other, and in a third step, pressure control is performed so that a total value of reaction forces on the one end side and the another end side in the rotation axis direction of the cooling drums is set to a predetermined value, and rotation axes of the cooling drums are held in parallel.

Abstract: In this cast strip manufacturing method, in a first step, one end side and another end side in a rotation axis direction of a pair of cooling drums are pressed with a first pressure in a direction in which the cooling drums come close to each other, in a second step, the one end side and the another end side in the rotation axis direction of the cooling drums are pressed with a second pressure, which is higher than the first pressure, in the direction in which the cooling drums come close to each other, and in a third step, pressure control is performed so that a total value of reaction forces on the one end side and the another end side in the rotation axis direction of the cooling drums is set to a predetermined value, and rotation axes of the cooling drums are held in parallel.

Abstract: There is provided a cast strip manufacturing method including: supplying a molten steel stored in a tundish (18) to a molten steel pool portion (16) formed by a pair of rotating cooling rolls (11) and a pair of side dams via an immersion nozzle (20); and forming and growing a solidified shell on a circumferential surface of the cooling roll (11) to manufacture a cast strip (1), in which a Si additive is added to the molten steel in the tundish (18), a Si concentration of the molten steel is adjusted to be within a fixed range, and a temperature of the molten steel in the tundish (18) is controlled to be within a fixed range.

Abstract: A scum adsorbing member provided in a twin roll continuous casting device to produce a slab by supplying a molten metal to a molten metal storage section formed by a pair of rotatable cooling rolls and a pair of side weirs, and forming and growing a solidified shell on each circumferential surface of the pair of cooling rolls, so that a part of the scum adsorbing member is immersed in the molten metal storage section includes a refractory containing a refractory metal oxide, wherein the scum adsorbing member has 15% by volume or more and 70% by volume or less of pores.

Abstract: This thin strip manufacture method is a thin strip manufacture method for manufacturing a thin strip by supplying molten steel to a molten steel pool formed by a pair of rotating cooling drums and a pair of side weirs to form and grow a solidified shell on a peripheral surface of the cooling drums, wherein a pressing force P of the pair of the cooling drums is set so that the pressing force P (kgf/mm) of the pair of cooling drums, casting thickness D (mm), and radius R (m) of the cooling drums satisfy 0.90?P×(D×R)0.5?1.30.

Abstract: A motor drive apparatus that can continue operation within the upper limit of system control even if a voltage drop of an AC power source occurs during operation of a motor used for a hoist or a crane is provided. The inverter control unit of the motor drive apparatus includes a speed reference setting means for setting the rotation speed of the motor, means for detecting a speed deviation between the output of the rotation speed detection means for detecting the rotation speed of the motor and the output of the speed reference setting means, means for controlling the output current of the inverter according to the output of the speed deviation. The speed reference setting means includes a correction circuit for correcting an external speed command given from outside.

Abstract: A spring steel according to the present embodiment has a chemical composition consisting of, in mass %, C: 0.4 to 0.7%, Si: 1.1 to 3.0%, Mn: 0.3 to 1.5%, P: 0.03% or less, S: 0.05% or less, Al: 0.01 to 0.05%, rare earth metal: 0.0001 to 0.002%, N: 0.015%, O or less: 0.0030% or less, Ti: 0.02 to 0.1%, with the balance being Fe and impurities. In the spring steel, the number of oxide inclusions having an equivalent circular diameter of equal to or greater than 5 ?m is equal to or less than 0.2/mm2, the oxide inclusions each being one of an Al-based oxide, a complex oxide containing REM, O and Al, and a complex oxysulfide containing REM, O, S, and Al. Further, a maximum value among equivalent circular diameters of the oxide inclusions is equal to or less than 40 ?m.

Abstract: A method for manufacturing Cu—Sn coexisting steel produces a good quality surface even after hot rolling. The steel is manufactured by continuous casting a molten steel that contains C: 0.04 to 0.20%, Si: 0.05 to 1.00%, Mn: 0.20 to 2.50%, P: no more than 0.05%, S: no more than 0.02%, Cu: 0.20 to 1.50%, Sn: 0.06 to 0.50%, Al: 0.06 to 1.00% and Ni: 0.05 to 1.00% by mass, and Fe and impurities as the remainder. The composition of the molten steel is defined as [Al]/(3[Si]+[Mn])?0.050, [Ni]/([Cu]+5[Sn])?0.10 and [Al]/[Ni]?0.20 if the content of an element X in the molten steel is represented as [X], an internal oxidation layer is formed in a process of cooling a slab, and Al2O3 is contained by the internal oxidation layer.

Abstract: A spring steel according to the present embodiment has a chemical composition consisting of, in mass %, C: 0.4 to 0.7%, Si: 1.1 to 3.0%, Mn: 0.3 to 1.5%, P: 0.03% or less, S: 0.05% or less, Al: 0.01 to 0.05%, rare earth metal: 0.0001 to 0.002%, N: 0.015%, O or less: 0.0030% or less, Ti: 0.02 to 0.1%, with the balance being Fe and impurities. In the spring steel, the number of oxide inclusions having an equivalent circular diameter of equal to or greater than 5 ?m is equal to or less than 0.2/mm2, the oxide inclusions each being one of an Al-based oxide, a complex oxide containing REM, O and Al, and a complex oxysulfide containing REM, O, S, and Al. Further, a maximum value among equivalent circular diameters of the oxide inclusions is equal to or less than 40 ?m.

Abstract: A method for manufacturing Cu—Sn coexisting steel produces a good quality surface even after hot rolling. The steel is manufactured by continuous casting a molten steel that contains C: 0.04 to 0.20%, Si: 0.05 to 1.00%, Mn: 0.20 to 2.50%, P: no more than 0.05%, S: no more than 0.02%, Cu: 0.20 to 1.50%, Sn: 0.06 to 0.50%, Al: 0.06 to 1.00% and Ni: 0.05 to 1.00% by mass, and Fe and impurities as the remainder. The composition of the molten steel is defined as [Al]/(3[Si]+[Mn])?0.050, [Ni]/([Cu]+5[Sn])?0.10 and [Al]/[Ni]?0.20 if the content of an element X in the molten steel is represented as [X], an internal oxidation layer is formed in a process of cooling a slab, and Al2O3 is contained by the internal oxidation layer.

Abstract: A solid-state imaging device includes a semiconductor substrate having a pixel region including a photoelectric conversion portion, a wiring portion including a conductor line and disposed on the semiconductor substrate with an insulating film therebetween, a metal pad connected to the conductor line, a pad-coating insulating film coating the metal pad, and a waveguide material layer. The wiring portion and the pad-coating insulating film each have an opening therein over the photoelectric conversion portion, and the openings continue from each other to define a waveguide opening having an open side and a closed side. The waveguide material layer is disposed in the waveguide opening and on the pad-coating insulating film with a passivation layer therebetween. The pad-coating insulating film has a thickness of 50 to 250 nm and a face defining the opening. The face is slanted so as to diverge toward the open side of the opening.

Abstract: A solid-state imaging device includes a semiconductor substrate having a pixel region including a photoelectric conversion portion, a wiring portion including a conductor line and disposed on the semiconductor substrate with an insulating film therebetween, a metal pad connected to the conductor line, a pad-coating insulating film coating the metal pad, and a waveguide material layer. The wiring portion and the pad-coating insulating film each have an opening therein over the photoelectric conversion portion, and the openings continue from each other to define a waveguide opening having an open side and a closed side. The waveguide material layer is disposed in the waveguide opening and on the pad-coating insulating film with a passivation layer therebetween. The pad-coating insulating film has a thickness of 50 to 250 nm and a face defining the opening. The face is slanted so as to diverge toward the open side of the opening.

Abstract: A continuous casting mold for a Cu alloy, using any one member selected from a glassy carbon, a metal-based self-lubricating composite or a graphite with a bulk density exceeding 1.92, at least for the mold member including the solidification starting position of the Cu alloy melt. A continuous casting mold for a Cu alloy, composed of any one member selected from a graphite, a ceramic and a metal member or of a combination of two or more parts of members thereof, in which at least the inner wall in the solidification starting position of the Cu alloy melt is coated with a self-lubricant or a metal-based self-lubricating composite material.

Abstract: Thin cast sheets having an excellent quality are obtained by continuous casting in which a semi-solidified metal slurry is fed from a continuous production device of the semi-solidified metal slurry through a discharge nozzle provided with means for heating the nozzle itself into a twin roll type continuous strip caster, at where the slurry is rapidly quenched and solidified to fine a structure and dispersion of precipitate.