C21D1/667

Cooling device for hot-rolled steel sheet and cooling method of hot-rolled steel sheet

The present cooling device includes: when cooling regions obtained by dividing an entire cooling region into a plurality of portions in a steel sheet conveyance direction and three or more portions in a width direction are set as divided cooling surfaces, a cooling water nozzle 23 and a switching device that switches between collision and non-collision of cooling water jetted from the cooling water nozzle 23 with the divided cooling surface, the cooling water nozzle 23 and the switching device provided for each of the divided cooling surfaces; and a control device that controls operation of the switching device based on a width-direction temperature distribution. The cooling water nozzle 23 has a jet axis P inclined with respect to a vertical line to the entire cooling region when viewed in the steel sheet conveyance direction, and the cooling water goes to the side opposite to the cooling water nozzle 23 in the width direction after colliding with the divided cooling surface.

TEMPERATURE-CONTROL DEVICE FOR PARTIALLY COOLING A COMPONENT
20230019923 · 2023-01-19 ·

The invention relates to a temperature-control device for partially cooling a component, wherein the component is blown on with a fluid in the region to be cooled by means of a nozzle. The nozzle comprises a connecting tube which is connected to a fluid reservoir in a fluid-conducting manner and which is connected to a plurality of nozzle tubes in a fluid-conducting manner.

TEMPERATURE-CONTROL DEVICE FOR PARTIALLY COOLING A COMPONENT
20230019923 · 2023-01-19 ·

The invention relates to a temperature-control device for partially cooling a component, wherein the component is blown on with a fluid in the region to be cooled by means of a nozzle. The nozzle comprises a connecting tube which is connected to a fluid reservoir in a fluid-conducting manner and which is connected to a plurality of nozzle tubes in a fluid-conducting manner.

DEVICE AND METHOD FOR HEAT TREATMENT OF STEELS, INCLUDING A WET COOLING
20230017287 · 2023-01-19 ·

The invention relates to a method and a device for rapidly cooling a metal strip and removing residues present on the strip after this cooling, wherein the residues are formed during a cooling of said metal strip by a non-oxidizing liquid solution for the metal strip and a stripping liquid solution for the oxides present on the surface of the strip, or by a mixture of this liquid solution and a gas.

DEVICE AND METHOD FOR HEAT TREATMENT OF STEELS, INCLUDING A WET COOLING
20230017287 · 2023-01-19 ·

The invention relates to a method and a device for rapidly cooling a metal strip and removing residues present on the strip after this cooling, wherein the residues are formed during a cooling of said metal strip by a non-oxidizing liquid solution for the metal strip and a stripping liquid solution for the oxides present on the surface of the strip, or by a mixture of this liquid solution and a gas.

HARDNESS PREDICTION METHOD OF HEAT HARDENED RAIL, THERMAL TREATMENT METHOD, HARDNESS PREDICTION DEVICE, THERMAL TREATMENT DEVICE, MANUFACTURING METHOD, MANUFACTURING FACILITIES, AND GENERATING METHOD OF HARDNESS PREDICTION MODEL
20230221231 · 2023-07-13 ·

The hardness of a rail after the rail having a temperature equal to or higher than an austenite region temperature is forcibly cooled in a cooling facility is predicted. A plurality of sets of data for learning composed of a cooling condition data set and output data of hardness are acquired using a model that performs computing by using a cooling condition data set having at least a surface temperature of the rail before the start of cooling and the operating conditions of the cooling facility as input data and the hardness inside the rail after the forced cooling as output data.

SYSTEMS AND METHODS FOR AUTOMATIC SPRAY QUENCHING
20230220507 · 2023-07-13 ·

A spray quenching system including a quench box configured to receive a part for quenching. The system may include mechanical arms disposed within the quench box and thermocouples disposed on the mechanical arms that may be moved to contact the part surface. The system may include non-contact temperature sensors within the quench box that measure the temperature part surface, and spray nozzles within the quench box that spray the part with a quenching fluid. The system may include a controller in electronic communication with the mechanical arms, the spray nozzles, the thermocouples, and the non-contact temperature sensors, that is configured to initiate a quenching process, receive temperature data, analyze the temperature data to determine a temperature difference value, determine that the temperature difference value exceeds a threshold temperature difference value, and adjust the quenching process if the temperature difference value exceeds the threshold temperature difference value.

SYSTEMS AND METHODS FOR AUTOMATIC SPRAY QUENCHING
20230220507 · 2023-07-13 ·

A spray quenching system including a quench box configured to receive a part for quenching. The system may include mechanical arms disposed within the quench box and thermocouples disposed on the mechanical arms that may be moved to contact the part surface. The system may include non-contact temperature sensors within the quench box that measure the temperature part surface, and spray nozzles within the quench box that spray the part with a quenching fluid. The system may include a controller in electronic communication with the mechanical arms, the spray nozzles, the thermocouples, and the non-contact temperature sensors, that is configured to initiate a quenching process, receive temperature data, analyze the temperature data to determine a temperature difference value, determine that the temperature difference value exceeds a threshold temperature difference value, and adjust the quenching process if the temperature difference value exceeds the threshold temperature difference value.

METHOD AND APPARATUS FOR HARDENING MOLD GRIDS USING CLAMP QUENCHING
20230213282 · 2023-07-06 ·

A method and apparatus for treating a workpiece such as a mold grid includes moving the workpiece laterally along a conveyor assembly into a furnace for heating in a carbon-rich atmosphere to form a heated workpiece. The heated workpiece is then received from the furnace onto the conveyor assembly in an enclosed vestibule whereupon it is clamped under pressure between an overhead mechanical press and the conveyor assembly to form a clamped assembly. The clamped assembly, including a portion of the conveyor, is then lowered into a quenching bath via an elevator assembly until the heated workpiece is quenched, whereupon the clamped assembly is raised out of the bath and the clamping force released. This clamping during quenching acts to maintain the workpiece in a planar orientation while reducing warpage during the quenching process.

HOT STAMPING FORMING METHOD ENABLING FORMATION OF COMPONENT HAVING DIFFERENT STRENGTH AT EACH PART BY CONTROLLING COOLING BY POSITION

According to the present disclosure, a hot stamping forming method for forming components having various strength according to parts through cooling control for each position includes: setting a required strength for each product part for a sheet supplied into a multi-point forming mold device to which a plurality of forming modules are coupled; adjusting an arrangement of the plurality of forming modules according to the set required strength; and performing cooling control for each part by controlling an amount of cooling air or mist sprayed to the sheet by the air jet nozzle in order to achieve a required cooling speed for each strength part of the supplied sheet, wherein components having various shapes are formable with respect to the supplied sheet in a single mold.