Abstract: A compression stage includes a cylinder, a piston, a first piston ring group, and a second piston ring group. The cylinder includes a first cooling channel through which a cooling fluid for absorbing heat generated between the cylinder and the first piston ring group flows, a second cooling channel through which a cooling fluid for absorbing heat generated between the cylinder and the second piston ring group flows, and an intermediate part disposed between the first cooling channel and the second cooling channel. A communication channel is connected to the intermediate part and a connection pipe, and guides a hydrogen gas leaking from a compression chamber through the first piston ring group to the intermediate part, to the outside of the cylinder.
Abstract: A blast furnace operation method according to one aspect of the present invention includes: a process of acquiring a correlation between a carbon consumption in reducing gas and a reduction Input?C in specific carbon consumption caused by blowing the reducing gas into the blast furnace per molar ratio C/H of carbon atoms to hydrogen atoms in the reducing gas; a process of determining a carbon consumption in the reducing gas where the reduction Input?C in specific carbon consumption is a predetermined target value or higher on the basis of the correlation acquired per C/H; and a process of adjusting the amount of the reducing gas blown into the blast furnace on the basis of the determined carbon consumption in the reducing gas and the carbon proportion in the reducing gas.
Abstract: In an arc-tracking welding method and a welding device of the present invention, a deviation amount between a weaving center and a welding line is obtained based on a first relationship and a second relationship. The first relationship is a relationship between a weaving position and any one element of three electrical first to third elements related to Ohm's law, the relationship being obtained based on a physical model of an arc welding phenomenon and being associated with the deviation amount. The second relationship is a relationship between the weaving position and the element, the relationship being obtained based on the element in welding power.
Abstract: A method for joining a plated steel sheet includes forming a plurality of protrusions, overlapping a first steel sheet, and performing arc welding, by which first and second steel sheets, at least one of which is a plated steel sheet, are arc welded. In the forming, the plurality of protrusions that is substantially perpendicular to an edge portion of the first steel sheet and is positioned along the edge portion is formed in an overlapping surface of the first steel sheet. In the overlapping, the first and second steel sheets are overlapped such that the protrusions protrude in a direction toward an overlapping surface of the second steel sheet. In the performing the arc welding, an arc welding is performed linearly in the edge portion of the first steel sheet or second steel sheet.
Abstract: A boil-off gas supply device is provided with: a storage tank configured to store a liquefied gas; a first compression mechanism configured to suck in the boil-off gas of the liquefied gas stored in the storage tank and compress the sucked boil-off gas; a second compression mechanism configured to compress the boil-off gas after being compressed by the first compression mechanism; a discharge path in which the boil-off gas discharged from the second compression mechanism flows; a first drive source configured to drive the first compression mechanism; and a second drive source that is different from the first drive source and configured to drive the second compression mechanism.
Abstract: Disclosed is a mechanical structure steel for cold-working, including: C: 0.32 to 0.44% by mass, Si: 0.15 to 0.35% by mass, Mn: 0.55 to 0.95% by mass, P: 0.030% by mass or less, S: 0.030% by mass or less, Cr: 0.85 to 1.25% by mass, Mo: 0.15 to 0.35% by mass, and Al: 0.01 to 0.1% by mass, with the balance consisting of iron and inevitable impurities, wherein an area ratio of proeutectoid ferrite is 30% or more and 70% or less, and an average grain size of ferrite crystal grains is 5 to 15 ?m.
Abstract: An extraction system includes an extractor that carries out an extraction treatment of bringing a raw material liquid into contact with an extraction liquid so that metal ions are extracted from the raw material liquid to migrate to the extraction liquid, a raw material liquid return path that leads the raw material liquid from a separator to a raw material liquid tank; and a raw material liquid pH regulator addition apparatus connected to a raw material liquid pH adjustment place that is one of the raw material liquid tank and the raw material liquid return path, the raw material liquid pH regulator addition apparatus configured to add a raw material liquid pH regulator to the raw material liquid, the raw material liquid pH regulator being a pH regulator that increases pH of the raw material liquid that have been decreased by the extraction treatment.
Abstract: Disclosed is a steel sheet including predetermined elements in each predetermined amount, with the balance consisting of iron and inevitable impurities, wherein a total area ratio of bainite, bainitic ferrite, martensite, residual austenite, and a martensite-austenite mixed structure is 95% or more and 100% or less, a total area ratio of ferrite and pearlite is less than 5%, an area ratio of the martensite-austenite mixed structure is 5% or more and 30% or less, an average section length of the martensite-austenite mixed structure is 0.32 ?m or less, and a proportion of an area of a region in ferrite, bainitic ferrite, and martensite where no cementite is present to the total area of ferrite, bainitic ferrite, and martensite is 3.0% or more and 5.0% or less.
Abstract: A pulse arc welding profile control method, a control device, a welding system, a welding program, and a welding power supply are provided in which, even when a pulse arc welding method is used, protruding change information is extractable at high accuracy without influence from a welding current or an arc voltage having a pulse shape. An electric change amount detected at the time of weaving includes, as a parameter, at least one among a welding current detection signal and an arc voltage detection signal, takes a predetermined period as one period, calculates an average value of the electric change amount in each one period, and extracts, on the basis of the average value, the protruding change information in a groove to follow a welding line.
Abstract: An excess metal amount setting method includes: a thermal shrinkage prediction step of predicting a thermal shrinkage amount in the deposited body after manufacturing; a thermal shrinkage modifying step of obtaining a thermal deformation modifying profile by expanding a target profile according to the thermal shrinkage amount; a release strain prediction step of predicting an elastic deformation amount due to release strain of the deposited body after machining; an elastic deformation modifying step of obtaining an elastic deformation modifying profile by deforming the thermal deformation modifying profile according to the elastic deformation amount in a direction opposite to a deformation direction due to the release strain; and an excess metal amount setting step of adjusting an outer edge shape of the deposited body so that an excess metal amount from the elastic deformation modifying profile to an outer edge of the deposited body falls within a predetermined reference range.
Abstract: Provide is a phase separator having a phase separation function and a function of promoting mutual contact between the first liquid and the second liquid in a compact structure. The phase separator includes a main body container, a partition member, and a mixed-liquid introduction part. The body container defines a storage space for the mixed liquid. The partition member partitions the storage space into a plurality of horizontally arranged spaces including a mutual contact space allowing the first and second liquids to flow vertically while being in contact with each other, and a phase separation space for separating the mixed liquid into a first liquid phase and a second liquid phase. The mixed-liquid introduction part allows introduction of the mixed liquid through the mixed-liquid introduction part to make the mixed liquid flow from the introduction end toward the discharge end of the partition member through the mutual contact space.
Abstract: A vehicle body structure includes a battery disposed in a lower central part of a vehicle body, a hollow side sill extending in a vehicle front-rear direction and disposed outside the battery in a vehicle width direction, and a reinforcing member configuring at least a part of a continuous tubular structure formed inside the side sill. The continuous tubular structure has a shape in which a plurality of octagons are continuously arranged as viewed from the vehicle width direction.
Abstract: To provide an Al—Mg—Si-based aluminum alloy sheet excellent in formability with excellent breaking elongation and work hardenability. An Al—Mg—Si-based aluminum alloy sheet excellent in formability contains Mg: 0.3 mass % or more and 0.45 mass % or less and Si: 0.6 mass % or more and 1.75 mass % or less with the balance being Al and inevitable impurities, in which, when content of the Mg is expressed [Mg] in terms of mass % and content of the Si is expressed [Si] in terms of mass %, [Si]/[Mg] is more than 2.5, a height of a first exothermic peak appearing in a temperature range of 210° C. or above and below 260° C. in a differential scanning thermal analysis curve is 20 ?W/mg or more, and a height of a second exothermic peak appearing in a temperature range of 260° C. or above and 370° C. or below in a differential scanning thermal analysis curve is 18 ?W/mg or more.
Abstract: There is provided a die plate, a resin machine, and a method of heating nozzles of the die plate that can suppress temperature unevenness of the nozzles and increase the temperature rise performance of the nozzles. The die plate includes a nozzle group including a plurality of nozzles through which molten resin passes, and a heating medium guidance part that guides a heating medium for heating a nozzle wall of each nozzle. The heating medium guidance part includes an inlet that receives the heating medium, an outlet that discharges the heating medium from a heating medium channel, and a guidance wall that defines a heating channel that causes the inlet and the outlet to be in communication with each other together with an outer peripheral surface of the nozzle wall of each of the plurality of nozzles.
Abstract: The gas supply apparatus is installed in a site of a facility for replenishing hydrogen gas. The gas supply apparatus includes: a gas treatment unit for treating the hydrogen gas; a housing including a gas unit accommodation part fix accommodating the gas treatment unit; and a duct part for allowing the air to flow out of or into the gas unit accommodation part. The housing includes a side section and a top section each having a barrier member. The duct part includes an inner opening section opened horizontally to the gas unit accommodation part, a passage section joining the inner opening section, and an outer opening section causing the passage section to open to an outside of the housing. The duct part has a barrier member.
Abstract: The present invention relates to a powder mixture for iron-based powder metallurgy which is obtained by mixing an iron-based powder and at least one kind of powders selected from the group consisting of a Ca—Al—Si-based composite oxide powder and a Ca—Mg—Si-based composite oxide powder, in which with a peak height of a main phase exhibiting the highest peak intensity by X-ray diffraction as 100, the composite oxide powder has a relative height of 40% or less, with respect to the main phase, of a peak height of a second phase having the second highest peak intensity.
Abstract: A welding power source is configured to supply a welding current to a wire as a consumable electrode. The welding power source includes a controller configured to change the welding current based on a position of a distal end of the wire a distance from which to a surface of a base metal varies periodically, in a case where the distal end of the wire is fed toward the base metal with periodical switching between a forward feeding period and a reverse feeding period.
Abstract: A joint structure, includes: a first member including a high tensile strength steel; and a second member including a high tensile strength steel and superposed on the first member, the first member and the second member being resistance welded to each other, in which a gap between the first member and the second member is between 0 mm and 3 mm, a nugget is not formed at a joint portion between the first member and the second member, or when the nugget is formed at the joint portion between the first member and the second member, a diameter D1 of the nugget satisfies D1<5 mm, and a decarburized layer is provided on at least one of a superposition surface of the first member, on which the second member is superposed, and a superposition surface of the second member, on which the first member is superposed.
Abstract: A Ni-based alloy flux cored wire includes a Ni-based alloy outer sheath and a flux with which the Ni-based alloy outer sheath is filled, and includes, per a total mass of the wire, Ni: 45 mass % to 75 mass %, Cr: 20 mass % or less, Mo: 10 mass % to 20 mass %, Fe: 10.0 mass % or less, TiO2: 3 mass % to 11 mass %, Ca: 0.01 mass % to 2.0 mass %, F: 1.0 mass % or less (including 0 mass %), and Nb: less than 0.5 mass % (including 0 mass %).
Abstract: A method for displaying an image of a surface of a tire includes: taking an image of a surface of a tire formed with a mark having a protrusion and a recess; acquiring waveform data from the taken image of the surface; creating a histogram from the waveform data; determining, based on the histogram, a first bin threshold to distinguish a surface luminance of the protrusion of the mark, and a second bin threshold to distinguish a surface luminance of the recess of the mark; and displaying the image of the surface of the tire including the mark on a screen by representing a region equal to or higher than the first bin threshold, a region lower than the first bin threshold and higher than the second bin threshold, and a region equal to or lower than the second bin threshold in the histogram in three attributes of color.