Chuo-ku, Japan
Chuo-ku, Japan

Kobe Steel, Ltd. , operating worldwide under the brand Kobelco, is a major Japanese steel manufacturer headquartered in Chuo-ku, Kobe. Kobe Steel also has a stake in Osaka Titanium Technologies.It was formed on September 1, 1905. Its location in a major city port was useful for importing and exporting iron ore and coal. Kobe Steel is the owner of the rugby team Kobe Steel Kobelco Steelers.The company is listed on the Tokyo and Nagoya Stock Exchange, on the Osaka Securities Exchange and is a constituent of the Nikkei 225 stock index. As of March 31, 2014, the company has 208 subsidiary and 62 affiliated companies across Japan, Asia, Europe, the Middle East and the US. Wikipedia.


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Patent
Kobe Steel | Date: 2017-05-10

A hard coating film that has formed therein an adhesion-reinforcing layer that comprises A layers that are composed of [Si(CN)] and B layers that are composed of [TiAl(CN)] or the like. The A layers and B layers are alternately layered upon a substrate upon a ground layer that comprises the B layer. For at least one pair of A layers that are adjacent with the B layer therebetween, the A layer that is farther from the ground layer is thicker than the A layer that is closer to the ground layer. The thickest A layer is 15 nm or more.


Patent
Kobe Steel | Date: 2017-05-10

An object of the present invention is to provide a wire rod for a steel wire, which is excellent in low cycle fatigue characteristics and is useful as a material for a high-strength steel wire such as a wire rope or a PC steel wire, and to provide a steel wire that can exhibit such characteristics. A wire rod for a steel wire of the present invention comprises by mass: C: 0.70 to 1.3%; Si: 0.1 to 1.5%; Mn: 0.1 to 1.5%; N: 0.001 to 0.006%; Al: 0.001 to 0.10%; Ti: 0.02 to 0.20%; B: 0.0005 to 0.010%; P: 0% or more and 0.030% or less; and S: 0% or more and 0.030% or less, with the balance being iron and inevitable impurities, wherein, the wire rod has pearlite as a main phase, an area ratio of proeutectoid ferrite is 1.0% or less, and an average thickness of the proeutectoid ferrite is 5 m or less.


Patent
Kobe Steel | Date: 2017-05-10

A cutting tool production method according to the present invention has: a rake face formation step wherein a rake face is formed in a parent material that is the source of a cutting tool; a flank face formation step wherein a flank face is formed in the parent material that is the source of the cutting tool; a chamfer formation step wherein a chamfer is formed at a site where the formed flank face and rake face intersect; and an R face formation step wherein an R face is formed between the chamfer and the flank face. The production method also comprises an R value calculation step that is for calculating an R value that is the value of the radius of the R surface formed in the R face formation step.


Patent
Kobe Steel | Date: 2017-05-03

Laminated hard film being alternatingly layered with one or more of each of a layer (A) (M_(a)Al_(b)Cr_(c)Ta_(d)) (B_(x)C_(y)N_(z)), (in which M represents V, etc., 0a0.35, 0.05d0.35, 00.15, 0y0.50, a+b+c+d=1, and x+y+z=1), and a layer (B) (Ti_()Si_()) (B_(x)C_(y)N_(z)) (in which 0.050.35, 0x0.15, 0y0.50, +=1, and x+y+z=1).


Provided are a method and an apparatus enabling a fiber-reinforced thermoplastic resin tape having few defective portions to be manufactured. The provided apparatus includes a resin impregnating device (3) including a container (3a) and allowing the fiber bundle (8) impregnated with a thermoplastic resin to be discharged through an outlet thereof, a nozzle (18) provided to the outlet and having an opening allowing the fiber bundle to pass therethrough while forming the fiber bundle into a tape shape, and a main cooling roller (20) feeding and cooling the fiber bundle (8) having passed through the nozzle (18) while making contact with the fiber bundle at a contact position. The opening is a rectangular slit. With T (mm) being the dimension of the short sides of the slit and L (mm) being the distance between a tip of the nozzle (18) and the contact position, the dimension T and the distance L satisfy either one of Expression (A) and Expression (B) below:


Patent
Kobe Steel | Date: 2017-05-24

A rotary hearth furnace is provided with a means for supplying an agglomerate on the hearth of the rotary hearth furnace, a means for discharging heated objects that have been heated inside the rotary hearth furnace to the outside of the furnace, and a means for discharging exhaust gas inside the rotary hearth furnace to the outside of the furnace. The rotary hearth furnace has a heated zone and an unheated zone. The means for discharging the exhaust gas to the outside of the furnace is provided in the unheated zone. A means for intake of external air into the furnace is provided in the unheated zone and upstream of the means for discharging the exhaust gas to the outside of the furnace in the direction of exhaust gas flow.


Provided is a method for reliably and simply evaluating the quality of an oxide semiconductor thin film and a laminated body having a protective film on the surface of this oxide semiconductor thin film. Also provided is a method for reliably and simply managing the quality of an oxide semiconductor thin film. This method, which is for evaluating the quality of an oxide semiconductor thin film and a laminated body having a protective film on the surface of this oxide semiconductor thin film, has: a first step, wherein an oxide semiconductor thin film is formed on a substrate, after which the electron state of the oxide semiconductor thin film is measured by a contact method or a noncontact method, thereby evaluating defects arising from in-film defects in the oxide semiconductor thin film; and a second step, wherein the oxide semiconductor thin film is processed on the basis of a condition determined on the basis of that evaluation, after which a protective film is formed on the surface of the oxide semiconductor thin film, and then the electron state of the oxide semiconductor thin film is measured by a contact method or a noncontact method, thereby evaluating defects arising from defects at the interface between the oxide semiconductor thin film and the protective film.


Patent
Kobe Steel | Date: 2017-05-24

To provide a welding method that can suppress the occurrence of hot cracking in a weld metal with satisfactory slag removability and bead state, while exhibiting excellent welding efficiency in the tandem submerged arc welding for a high-Cr CSEF steel. Disclosed is a tandem submerged arc welding method for a high-Cr CSEF steel, which includes welding under the conditions at a wire feeding speed V_(L) of a leading electrode of 45 to 90 g/min; a wire feeding speed V_(T) of a trailed electrode of 60 to 110 g/min; a welding speed v of 30 to 55 cm/min; and a welding amount per unit length of 2.8 to 3.8 g/cm.


Patent
Kobe Steel | Date: 2017-05-24

To provide a welding method that can suppress hot cracking in an initial layer in a single submerged arc welding for a high-Cr CSEF steel. Disclosed is a single submerged arc welding method for a high-Cr CSEF steel, which includes using a combination of a welding wire including less than 0.05% by mass of C, 0.055% by mass or less of N, and more than 0.05% by mass and 0.50% by mass or less of Si, with the balance being Fe and inevitable impurities, and a welding flux including 2 to 30% by mass of CaF_(2), 2 to 20% by mass of CaO, 20 to 40% by mass of MgO, 5 to 25% by mass of Al_(2)O_(3), and 5 to 25% by mass of Si and SiO_(2) in total (in terms of SiO_(2)), and further including, in limited amounts, 25% by mass or less of BaO, 10% by mass or less of ZrO_(2), and less than 5% by mass of TiO_(2).


Patent
Kobe Steel | Date: 2017-05-24

An extracting method includes: an extracting step of extracting a specific component from a material fluid to an extraction agent while allowing the material fluid and the extraction agent to flow in a channel of the extraction unit for each of stages; an outflowing step of outflowing a mixture fluid containing the material fluid and the extraction agent from the channel of the extraction unit for each of the stages before extraction of the specific component from the material fluid reaches an extraction equilibrium in the channel of the extraction unit for each of the stages; a separating step of separating the mixture fluid having been flown out from the channel of the extraction unit for each of the stages into the material fluid and the extraction agent; a material fluid conveying step of conveying the material fluid having been separated in the separating step after flown out from the channel of one of a plurality of extraction units for any one stage of the plurality of stages to the channel of one of the extraction units for the stage succeeding to any one stage; and a pH regulating step of regulating the pH of the material fluid having been separated in the separating step after flown out from the channel of the extraction unit for a predetermined stage so as to cause a reverse change from a change caused in the pH of the material fluid in accordance with the extraction of the specific component in the extracting step, before the material fluid is introduced into the channel of the extraction unit for a stage succeeding to the predetermined stage.

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