公开(公告)号：US11920206B2

公开(公告)日：2024-03-05

申请号：US17958603

申请日：2022-10-03

Applicant: thyssenkrupp Rasselstein GmbH

Inventor： Burkhard Kaup ,  Peter Kirchesch ,  Manuel Köhl ,  Dimitrios Nouskalis ,  Alexander Gossen ,  Björn Ehmke

IPC: C21D8/02 ,  C21D9/46 ,  C21D9/573 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C21D8/0236 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/0273 ,  C21D9/46 ,  C21D9/573 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D2211/005

Abstract: A cold rolled steel flat product for packaging made of a low carbon steel having a thickness of less than 0.49 mm and a method of making. The steel flat product has a martensite-free microstructure and represents a standard grade for packaging with tensile strengths from 300 to 550 MPa, which can be produced from a cold-rolled steel sheet with a carbon content from 0.01% to 0.1% by weight by inductive annealing of the steel sheet and subsequent water cooling for quenching the recrystallization-annealed steel sheet. To achieve flatness of 5 I-units or less, the induction annealed steel sheet is first primarily cooled in the manufacturing process to a take-off temperature at a rate of less than 1000 K/s, with the take-off temperature being below the transformation temperature of 723° C., and thereafter a secondary cooling by water cooling with a water temperature of less than 80° C. at a rate of more than 1000 K/s.

公开(公告)号：US20240026490A1

公开(公告)日：2024-01-25

申请号：US17768688

申请日：2020-09-30

Applicant: FIVES STEIN

Inventor： Catherine PASQUINET

IPC: C21D9/573 ,  C21D1/18 ,  C21D9/00 ,  C21D1/667 ,  C21D1/60 ,  C21D1/613 ,  C21D11/00 ,  B21B37/44

CPC classification number: C21D9/573 ,  C21D1/18 ,  C21D9/0062 ,  C21D1/667 ,  C21D1/60 ,  C21D1/613 ,  C21D11/005 ,  B21B37/44 ,  C21D2211/008

Abstract: Method for reducing unevenness in a strip subjected to cooling by spraying of liquid, or a mixture of gas and liquid, along a cooling zone of a continuous heat treatment one, the cooling intensity being adjusted in the direction of travel of the strip so as to achieve a relative position between the Leidenfrost temperature and at least one temperature at which the metallurgical structure changes such that said cooling intensity minimizes the internal stresses of the strip, and device for implementing the method.

公开(公告)号：US11724296B2

公开(公告)日：2023-08-15

申请号：US16970508

申请日：2019-03-22

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Jianfeng Wu ,  Xiaobo Wang ,  Zhaohui Hu ,  Yong Zhang ,  Wendong Liu ,  Qingfeng Zhang ,  Ye Liu ,  Guohua Xu

IPC: B21B45/02 ,  C21D9/573 ,  C21D1/667 ,  B21B1/26 ,  B21B37/76 ,  C21D8/02

CPC classification number: B21B45/0218 ,  B21B45/0233 ,  C21D1/667 ,  C21D9/573 ,  B21B1/26 ,  B21B37/76 ,  B21B2201/06 ,  C21D8/0263

Abstract: A side spray method for cooling a steel strip after hot rolling includes providing side spray devices behind multiple cooling sections on two sides in a width direction of a run out roller table of the steel strip after hot rolling. The side spray devices are staggered along the two sides of the run out roller table of the steel strip, the side spray devices include at least two spray units, each spray unit includes a spray tube and nozzles on the spray tube, the spray tubes being in parallel and vertically arranged along a running direction of the steel strip, and being movable along the running direction of the steel strip, covering ranges of the nozzles on the side spray devices are partially overlapped with each other, and a total spray coverage covering of nozzles covers a width of the run out roller table of the steel strip.

公开(公告)号：US11649516B2

公开(公告)日：2023-05-16

申请号：US16499324

申请日：2017-12-11

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Liejun Li ,  Feng Zhou ,  Jixiang Gao ,  Haibo Sun ,  Jietao Dai ,  Zhengwu Peng ,  Yanjun Lu

IPC: C21D1/18 ,  C21D8/02 ,  C21D9/573 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/26 ,  C22C38/32

CPC classification number: C21D8/0226 ,  C21D1/18 ,  C21D8/0236 ,  C21D8/0242 ,  C21D9/573 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/26 ,  C22C38/32 ,  C21B2400/026 ,  C21B2400/03 ,  C21D2211/001

Abstract: A method for manufacturing thin-specification high-Ti wear-resistant steel NM450 comprises the steps of preparing melted iron in a blast-furnace, preprocessing the melted iron, smelting the melted iron in a converter, refining the melted steel in a LF furnace, refining the melted steel in a RH furnace, conventional slab continuous casting, heating the slab in a heating furnace, dephosphorizing the slab by high-pressure water, heating the slab in a hot continuous rolling mill, performing ultra fast cooling, reeling, flattening, heating, quenching, tempering and finishing.

公开(公告)号：US20220299267A1

公开(公告)日：2022-09-22

申请号：US17806287

申请日：2022-06-10

Applicant: Novelis Inc.

Inventor： Corrado Bassi ,  Vinzenz Hofmann ,  Jörg Simon

IPC: F27B9/12 ,  C21D9/573 ,  C22F1/04 ,  F27B9/30 ,  F27B9/36 ,  F27B9/40 ,  F27D9/00

Abstract: Moving metal strips can be heat treated with any number or combination of dimensionally variable tempers across widths, lengths, or thicknesses of a metal strip. To provide dimensionally variable heat treatment, an apparatus can include one or more heating units suitable to increase the temperature of a metal strip moving proximate the apparatus to a heat treatment temperature. The apparatus can also include one or more cooling units positioned near the heating units to absorb heat and cool the metal strip to minimize the amount of heat transferred from a first region of the metal strip that is to be treated to a second region of the metal strip that is not to be treated.

公开(公告)号：US11414738B2

公开(公告)日：2022-08-16

申请号：US16341950

申请日：2017-09-28

Applicant: LIBERTY PERFORMANCE STEELS LIMITED

Inventor： Carl Jukes

IPC: C23C8/18 ,  C21D1/76 ,  C21D9/573 ,  C21D9/00 ,  C21D9/24 ,  C21D9/56 ,  C21D9/60

Abstract: An apparatus for manufacturing a stress relieved length of steel having an oxidised surface layer includes: a heating chamber; a reaction chamber coupled to the heating chamber; and a conveying mechanism conveying the length of steel along a path through the heating chamber and reaction chamber. The heating chamber includes a heating apparatus arranged to heat the length of steel in a heating portion of the path. The apparatus further includes a control means including a sealed unit defined by the heating chamber and the reaction chamber and arranged to control both the temperature of the length of steel and the atmosphere to which the length of steel is exposed in an oxidisation portion of the path within the reaction chamber in which the oxidised surface layer is formed. A method of manufacturing a stress relieved length of steel having an oxidised surface layer is also disclosed.

公开(公告)号：US20220033931A1

公开(公告)日：2022-02-03

申请号：US17292553

申请日：2018-11-14

Applicant: DRUIDS PROCESS TECHNOLOGY, S.L.

Inventor： Raimon PÉREZ SOLDEVILA ,  F. Javier AYESA MORROS ,  Carlos BITTNER

IPC: C21D9/573 ,  C21D9/56 ,  C21D1/60 ,  C21D1/667 ,  C21D1/74 ,  F27D9/00

Abstract: Cooling device (1) for cooling a wire (100), comprising a first chamber (2) and a second cooling chamber (4) through which the wire (100) passes. The device also comprises cooling liquid driving means (16) for driving the cooling liquid from the first chamber (2) to the second chamber (4) through at least one coding liquid inlet (12). Through the driving means (16) and the cooling liquid inlet (12), a jet of coding liquid is projected on the wire path at a mean speed of at least 0.6 m/s, and at a distance between 6 and 13 times the diameter of the wire (100). Cooling is performed in an inert gas atmosphere inside the second chamber (4). The invention also relates to a corresponding installation and a corresponding wire cooling method.

公开(公告)号：US11193181B2

公开(公告)日：2021-12-07

申请号：US16027980

申请日：2018-07-05

Applicant: FIVES STEIN

Inventor： Alain Genaud

IPC: C21D9/52 ,  C21D9/573 ,  C21D1/60 ,  C21D1/667 ,  C21D9/56 ,  C23G1/08 ,  C23G3/02 ,  C21D6/00 ,  C21D9/68 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40

Abstract: Disclosed is a continuous thermal treatment line for a steel strip. The strip passes through consecutive thermal treatment chambers, is quickly cooled in at least one of the chambers by spraying liquid onto the strip, or by spraying a fluid made up of gas and liquid or spraying a combination of gas and liquid forming a mist. After quick cooling, a protective metal layer is deposited on the strip by dip coating. The cooling fluid strips iron oxides or other alloy elements contained in the steel to be treated, minimizing oxidation and reducing the oxides on the strip. Spray pressure and distance are chosen to facilitate the stripping property and the mechanical action of the sprayed fluid, reducing the layer of oxides on the strip. The temperature of the strip at the end of the cooling step is the temperature necessary for carrying out the desired treatment cycle.

公开(公告)号：US11072839B2

公开(公告)日：2021-07-27

申请号：US15779961

申请日：2016-12-29

Applicant: ArcelorMittal

Inventor： Makhlouf Hamide ,  Charles Romberger ,  Jean-Luc Borean ,  Marie-Christine Régnier

IPC: C21D11/00 ,  B21B45/02 ,  C21D9/573 ,  C21D1/667

Abstract: A process for cooling a metal substrate running in a longitudinal direction, said process including ejecting at least one first cooling fluid jet on a first surface of said substrate and at least one second cooling fluid jet on a second surface of said substrate, said first and second cooling fluid jets being ejected at a cooling fluid velocity higher than or equal to 5 m/s, so as to form on said first surface and on said second surface a first laminar cooling fluid flow and a second laminar flow respectively, said first and second laminar cooling fluid flows being tangential to the substrate, said first and second laminar cooling fluid flows extending over a first predetermined length and a second predetermined length of the substrate respectively, said first and second lengths being determined so that the substrate is cooled from a first temperature to a second temperature by nucleate boiling.

公开(公告)号：US11072834B2

公开(公告)日：2021-07-27

申请号：US15769540

申请日：2017-01-10

Applicant: BWG BERGWERK- UND WALZWERK-MASCHINENBAU GMBH

Inventor： Dirk Schaefer ,  Andreas Noe ,  Thomas Vonderohe

IPC: C21D1/667 ,  C21D9/63 ,  C21D9/573 ,  F27D15/02

Abstract: The invention relates to a continuous flow cooling device (3) for cooling a metal strip (1), in particular a metal strip made of aluminum or an aluminum alloy, having at least one strip flotation cooler (4), which has several upper nozzles (5) distributed along the strip travel direction (B), and several lower nozzles (6) distributed along the strip travel direction (B), wherein the metal strip (1) can be transported in a floating manner between the upper nozzles (5) and the lower nozzles (6), and the upper side of the strip as well as the underside of the strip can be supplied with cooling air in the process, and having several water cooling units (7), by means of which the metal strip (1) can be supplied with cooling water. This device is characterized in that the water cooling units (7) are integrated in the strip flotation cooler (4).