A control method for a continuous casting machine, includes: estimating, by on-line real-time system, a flow state of molten steel in a mold by using an operation condition of a continuous casting machine and temperature data on the molten steel in the mold; calculating, by on-line real-time system, a molten steel flow index based on the estimated flow state of the molten steel, the molten steel flow index being a factor of mixing of an impurity into a casting inside the mold; and controlling the operation condition of the continuous casting machine such that the calculated molten steel flow index is within an appropriate range.

A device includes: an input device configured to receive an input of measurement results of a temperature and components of molten steel in a tundish of continuous casting facilities, measurement results of a width, a thickness, and a casting speed of a cast slab casted in the continuous casting facilities, and molten steel flow rate distribution in a mold; a model database configured to store a model expression and a parameter related to solidification reaction of molten steel in the mold; a convertor configured to convert a molten steel flow rate in the mold into a heat conductivity parameter; and a calculator configured to estimate a solidified shell thickness in the mold based on temperature distribution of the mold and steel in the mold calculated by solving a three-dimensional transient heat conduction equation using the measurement results.

The present disclosure belongs to the technical field of casting equipment, and provides a method and system for adjusting process parameters of a die-casting machine, and a storage medium. The method and the system can receive die wheel type, molten aluminum temperature, interruption time and defect information in real time, respond to the above information one by one according to a set response priority order, select die-casting process parameters, and automatically adjust different process parameters for different products and different working conditions, thereby realizing simultaneous control of multiple die-casting machines, replacing manual adjustment and improving product quality stability and production efficiency.

A device includes: an input device configured to receive an input of measurement results of a temperature and components of molten steel in a tundish of continuous casting facilities, measurement results of a width, a thickness, and a casting speed of a cast slab casted in the continuous casting facilities, and molten steel flow rate distribution in a mold; a model database configured to store a model expression and a parameter related to solidification reaction of molten steel in the mold; a convertor configured to convert a molten steel flow rate in the mold into a heat conductivity parameter; and a calculator configured to estimate a solidified shell thickness in the mold based on temperature distribution of the mold and steel in the mold calculated by solving a three-dimensional transient heat conduction equation using the measurement results.

A continuously casting method including arranging temperature measuring elements according to specified conditions, selecting as evaluation targets for temperatures of copper plates on a wide face of mold values measured by the temperature measuring elements arranged closer to a center in a width direction of a cast slab than short sides of the cast slab under continuous casting at levels of 50 mm or more lower in a slab withdrawal direction than a meniscus of a molten steel in a mold, and adjusting a casting condition such that a standard deviation of the values measured over the width direction of the copper plates on the wide face of mold at a same level in the slab withdrawal direction is 20° C. or lower.

The present invention relates to a method for monitoring a continuous steel casting process where molten steel is poured from a ladle into a tundish to be transferred through an exit nozzle into a mold, comprising the steps: obtaining (1010) a critical superheat temperature value for the molten steel; measuring (1020) temperature values of the molten steel over a time period; determining (1030) superheat temperature values corresponding to the measured temperature values by comparing the measured temperature values with a liquidus temperature of the molten steel; and predicting (1040) a forecast time instance when the critical superheat temperature value is reached. The invention also relates to an apparatus and to a computer-readable medium.

A high-strength steel sheet of the present invention has a specific chemical composition. Furthermore, in the steel sheet, a degree of Mn segregation in a specific region is 1.5 or less; a maximum P concentration in a specific region is 0.08 mass % or less; in a specific region, the number of specific MnS particle groups is 2.0 or fewer per 1 mm.sup.2, and the number of specific oxide-based inclusions is 8 or fewer per 1 mm.sup.2; of all of the oxide-based inclusions, oxide-based inclusions having a specified composition are present in a number ratio of 80% or greater; the microstructure includes, in terms of a volume fraction, 30 to 95% martensite and bainite in total, 5 to 70% ferrite phase, and less than 3% (and 0% or greater) austenite phase; and a tensile strength is 980 MPa or greater.

Disclosed is a method and system for adjusting process parameters of a die-casting machine, and a storage medium. The method and the system can receive die wheel type, molten aluminum temperature, interruption time and defect information in real time, respond to the above information one by one according to a set response priority order, select die-casting process parameters, and automatically adjust different process parameters for different products and different working conditions, thereby realizing simultaneous control of multiple die-casting machines, replacing manual adjustment and improving product quality stability and production efficiency.

A steel member according to an aspect of the present invention has a predetermined chemical composition, in which a metallographic structure includes, by a volume %, 60.0% to 85.0% of martensite, 10.0% to 30.0% of bainite, 5.0% to 15.0% of residual austenite, and 0% to 4.0% of a remainder in microstructure. A length of a maximum minor axis of the residual austenite is 30 nm or longer. A number density of a carbide which exist in the steel member and has a circle equivalent diameter of 0.1 μm or more and an aspect ratio of 2.5 or less is 4.0×10.sup.3 pieces/mm.sup.2 or less.

The invention relates to an ingot mold for continuous casting of metals, of the type consisting of an assembly of metal plates backed by cooling devices configured to allow the cooling of the metal plates by the circulation of a cooling fluid, comprising: a) at least one optical fiber, having a plurality of Bragg filters, extending in a wall of at least one of the plates, b) at least one groove formed in a wall of at least one of the plates, in a direction that is not parallel to the casting axis of the ingot mould in at least one portion of the length, the optical fiber extending in the groove, and c) a tongue of shape substantially complementary to the groove closing the groove over its entire length, the groove and the tongue having a shape suitable for the passage of the optical fiber.