JFE Steel Patente

The present invention provides, in the form of a welded joint for high-Mn steel to be used in cryogenic environments, a gas tungsten arc welding technology that can achieve further improvement of the strength of weld metal and enhanced inhibition of formation of hot cracks. Provided is a gas tungsten arc-welded joint of pieces of a steel material produced using a shielding gas and a filler metal. The steel material is austenitic steel with a high Mn content. Chemical composition of the weld material includes, in mass%, C: 0.15 to 0.80%, Si: 0.10 to 1.00%, Mn: 17.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.005 to 0.100%, Cr: 0.4 to 5.5%, Mo: 0.01 to 3.50%, Ni: 0.01 to 10.00%, and N: 0.0400 to 0.4000%, with the balance being composed of Fe and unavoidable impurities. Further provided is a production method of a welded joint in which a nitrogen gas is contained in a shielding gas, or a content of N in a filler metal is increased, to form the above-described weld metal.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Provided are a film thickness deviation measurement technology and a film manufacturing technology which are capable of acquiring information on a film thickness deviation of a film in a non-contact manner by a simple and safe device configuration. A film thickness deviation measurement method includes: setting a film to be measured as an object to be measured; setting a preset background image to be captured by imaging means; acquiring a reference image that is an image obtained by capturing the background image by the imaging means in a state in which the object to be measured is not interposed, or a reference image derived by calculation of an appearance of the background image by the imaging means in a state in which the object to be measured is not interposed; interposing the object to be measured between the background image and the imaging means to acquire a measurement image that is an image obtained by capturing the background image by the imaging means; and calculating an amount of displacement of the background image between two images including the acquired reference image and the acquired measurement image based on the two images to obtain a film thickness deviation of the object to be measured.

A process data editing method for a production line including a plurality of facilities having a plurality of devices that performs predetermined processing on a raw material and a conveyor that couples the plurality of devices and conveys the raw material includes a collecting step of collecting, by a collection unit included in a computer, process data indicating operational status of the plurality of facilities, and an editing step of compensating for a time lag according to a type of the facility through which the raw material passes in the production line and correlating the process data by an editing unit included in the computer.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

An object of the present invention is to provide a positive electrode active material for a sodium ion secondary battery which has a large discharge capacity and a high average operating voltage in the sodium ion secondary battery to be obtained. The positive electrode active material for a sodium ion secondary battery according to the present invention is a positive electrode active material for a sodium ion secondary battery, the material including a composite oxide represented by particular Formula (1), a crystalline structure of the composite oxide belongs to a space group R-3m, and in a diffraction chart obtained by performing X-ray diffraction measurement, a ratio of a peak strength of 003 reflection of the composite oxide to a peak strength of 104 reflection of the composite oxide is not less than 1.00.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Provided is a method for manufacturing a slab that enables the production of a slab of appropriate quality. The method for manufacturing a slab manufactures a slab of a predetermined size by using a continuous casting machine. The method for manufacturing a slab includes a soft reduction region setting step of setting a soft reduction region in the continuous casting machine, the soft reduction region containing a starting point for performing soft reduction on the slab and an endpoint at which the soft reduction is terminated, the soft reduction region being set based on a condition of cooling water for cooling the slab, in the continuous casting machine, a casting speed of slab, and a solid phase ratio of the slab determined from a composition of the slab; a reduction gradient setting step of setting a reduction gradient for the soft reduction region based on a thickness of the slab, a width of the slab, and the casting speed of slab; a secondary cooling intensity setting step of setting a first intensity section and a second intensity section, which are sections for performing secondary cooling in the soft reduction region, based on the solid phase ratio of the slab, the second intensity section being a section in which the secondary cooling is performed with a higher intensity than in the first intensity section; and a continuous casting step of performing continuous casting by using the set soft reduction region, reduction gradient, first intensity section, and second intensity section.

A method for estimating a physical quantity distribution of an object is a method for estimating a physical quantity distribution of an object when a coolant is sprayed from a spray nozzle to cool the object, the method including: a heat dissipation amount acquisition step of acquiring information regarding a heat dissipation amount from the object by the coolant by inputting a plurality of flow velocities of the coolant in a normal direction with respect to the object and a plurality of flow velocities of the coolant in a tangential direction with respect to the object to a machine learning model; and a physical quantity distribution calculation step of calculating a physical quantity distribution of at least one of a surface of the object and inside the object, using the heat dissipation amount as a boundary condition.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …