公开(公告)号：US20170283903A1

公开(公告)日：2017-10-05

申请号：US15631577

申请日：2017-06-23

Applicant: SMS Group GmbH

Inventor： Andreas Boettcher ,  Christian Klinkenberg ,  Ingo Schuster

IPC: C21D9/52 ,  C23C8/26 ,  C21D1/42 ,  C21D3/04 ,  C22C38/02 ,  C22C38/50 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C21D8/12 ,  C23F17/00

CPC classification number: C21D9/52 ,  C21D1/42 ,  C21D3/04 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1205 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  C22C38/42 ,  C22C38/50 ,  C23C8/02 ,  C23C8/26 ,  C23C8/80 ,  C23F17/00 ,  H01F1/14766 ,  H01F1/16 ,  Y02P10/253

Abstract: A process for producing grain-oriented electrical steel strip by means of thin slab continuous casting, comprising the following process steps: a) smelting a steel, b) continuously casting the smelt by thin slab continuous casting, c) heating up the thin slabs and subjecting the slabs to homogenization annealing at a maximum temperature of 1250° C., d) heating to a temperature between 1250° C. and 1350° C., e) continuously hot rolling the thin slabs to form a hot-rolled strip, f) cooling and reeling the hot-rolled strip to form a coil, g) annealing the hot-rolled strip after reeling and prior to a subsequent cold rolling step, h) cold rolling the hot-rolled strip to the nominal usable thickness, i) subjecting the cold-rolled strip to recrystallization, decarburization and nitridation annealing, j) applying an annealing separator (non-stick layer) to the strip surface of the cold-rolled strip, k) subjecting the cold-rolled strip to secondary recrystallization annealing, forming a finished steel strip having a pronounced Goss texture, and l) stress-free annealing the finished steel strip, which has been coated with an insulating layer, provides an improved process for producing grain-oriented electrical steel strip by means of thin slab continuous casting. This is achieved in that the recrystallization, decarburization and nitridation annealing of the cold-rolled strip in process step h) comprises a decarburization annealing phase and a subsequent nitridation annealing phase, with an intermediate reduction annealing phase being interposed between the decarburization annealing phase and the nitridation annealing phase, and carried out at a temperature ranging from 820° C.-890° C., for a maximum period of 40 seconds, with a dry, gaseous annealing atmosphere, which contains nitrogen (N2) and hydrogen (H2) and acts on the cold-rolled strip, and which has a water vapor/hydrogen partial pressure ratio pH2O/pH2 of less than 0.10.

公开(公告)号：US11898971B2

公开(公告)日：2024-02-13

申请号：US17622535

申请日：2020-06-24

Applicant: SMS group GmbH ,  IMS Messsysteme GmbH

Inventor： Christian Klinkenberg ,  Ulrich Sommers ,  Helmut Klein ,  Alexandre Lhoest ,  Olivier Pensis ,  Horst Krauthäuser

IPC: G01N23/20008 ,  G01N23/205 ,  G01N23/207 ,  G01N23/20091 ,  H01J35/08 ,  H01J35/10

CPC classification number: G01N23/20008 ,  G01N23/205 ,  G01N23/207 ,  G01N23/20091 ,  H01J35/08 ,  H01J35/10 ,  H01J35/112 ,  H01J35/116 ,  G01N2223/056 ,  G01N2223/1016 ,  G01N2223/20 ,  G01N2223/315 ,  G01N2223/316 ,  G01N2223/606 ,  G01N2223/624

Abstract: A method and a device for determining the material properties of a polycrystalline, in particular metallic, product during production or quality control of the polycrystalline, in particular metallic, product by means of X-ray diffraction using at least one X-ray source and at least one X-ray detector. In this case, an X-ray generated by the X-ray source is directed onto a surface of the polycrystalline product and the resulting diffraction image of the X-ray is recorded by the X-ray detector. After exiting the X-ray source, the X-ray is passed through an X-ray mirror, wherein the X-ray is both monochromatized and focused, by the X-ray mirror, in the direction of the polycrystalline product and/or the X-ray detector, and then reaches a surface of the metallic product.

公开(公告)号：US11319611B2

公开(公告)日：2022-05-03

申请号：US16084595

申请日：2017-03-03

Applicant: SMS Group GmbH

Inventor： Mostafa Biglari ,  Holger Behrens ,  Carsten Andreas Klein ,  Christian Klinkenberg ,  Lutz Kuemmel ,  Ulrich Sommers

IPC: C21D11/00 ,  C21D8/02 ,  B21B37/76 ,  C21D8/04 ,  C21D9/46 ,  B21B37/74 ,  G05B19/418 ,  B21B1/22 ,  C21D9/56 ,  C21D9/573 ,  C23C2/28 ,  C23C2/40 ,  G01N23/2055 ,  G05B13/02

Abstract: The invention relates to a method for rolling a metal product (1), wherein the metal product is subjected to a rolling operation at a first station (2), which rolling operation is controlled by a control device (3), wherein the product (1) is subject to a measurement at a second station (4), wherein the product (1) is subjected to a further processing operation at a third station (6), and wherein the product (1) is in a specified quality at a fourth station (7). In order to increase the quality of the produced strip, the invention provides that the method has the following steps: a) measuring the value of a material property (IW) that the second station (4); b) feeding the value measured at the second station (4) to the control device (3), comparing the measured value with a value (SW) stored in the control device (3), and adjusting a parameter (PPI) if the measured value deviates from the stored value (SW), e) measuring a value of a quality material property (Q) at the fourth station (7); d) comparing the measured value with a stored value, and initiating a measure to influence the quality material property (Q) if the measured value deviates from the stored value beyond a permissible tolerance.

公开(公告)号：US11249037B2

公开(公告)日：2022-02-15

申请号：US16304626

申请日：2017-05-24

Applicant: SMS GROUP GMBH

Inventor： Mostafa Biglari ,  Ulrich Sommers ,  Christian Klinkenberg ,  Michel Renard ,  Guy Raymond ,  Oliver Pensis ,  Tobias Terlau ,  Horst Krauthäuser

IPC: G01N23/20008 ,  C21D9/56 ,  C21D11/00 ,  G01N23/20 ,  G01N33/204 ,  B21B1/00 ,  B21B38/02

Abstract: A device for determining the microstructure of a metal product during metallurgical production of the metal product, the device having at least one X-ray source, at least one X-ray detector and at least one accommodating chamber, inside which the X-ray source and/or the X-ray detector is/are arranged and which has at least one window which is transparent to X-ray radiation. To allow reliable determination of the microstructure of a metal product during the metallurgical production thereof, the device includes at least one cooling installation for actively cooling the accommodating chamber.

公开(公告)号：US20190071750A1

公开(公告)日：2019-03-07

申请号：US16084595

申请日：2017-03-03

Applicant: SMS Group GmbH

Inventor： Mostafa Biglari ,  Holger Behrens ,  Carsten Andreas Klein ,  Christian Klinkenberg ,  Lutz Kuemmel ,  Ulrich Sommers

IPC: C21D11/00 ,  C21D9/56 ,  C21D9/573 ,  C21D8/02 ,  C23C2/40 ,  C23C2/28 ,  G01N23/2055 ,  B21B1/22

Abstract: The invention relates to a method for rolling a metal product (1), wherein the metal product is subjected to a rolling operation at a first station (2), which rolling operation is controlled by a control device (3), wherein the product (1) is subject to a measurement at a second station (4), wherein the product (1) is subjected to a further processing operation at a third station (6), and wherein the product (1) is in a specified quality at a fourth station (7). In order to increase the quality of the produced strip, the invention provides that the method has the following steps: a) measuring the value of a material property (IW) that the second station (4); b) feeding the value measured at the second station (4) to the control device (3), comparing the measured value with a value (SW) stored in the control device (3), and adjusting a parameter (PPI) if the measured value deviates from the stored value (SW), e) measuring a value of a quality material property (Q) at the fourth station (7); d) comparing the measured value with a stored value, and initiating a measure to influence the quality material property (Q) if the measured value deviates from the stored value beyond a permissible tolerance

公开(公告)号：US10010915B2

公开(公告)日：2018-07-03

申请号：US14772092

申请日：2014-03-10

Applicant: SMS Group GmbH

Inventor： Christoph Klein ,  Christian Bilgen ,  Christian Klinkenberg ,  Michael Pander ,  Luc Neumann ,  Dieter Rosenthal ,  Cosimo Andreas Cecere

IPC: B22D11/00 ,  B21B1/26 ,  B21B45/00 ,  C21D1/00 ,  C21D1/42 ,  C21D6/00

CPC classification number: B21B1/26 ,  B21B45/004 ,  B22D11/00 ,  C21D1/00 ,  C21D1/42 ,  C21D6/00 ,  Y02P10/253

Abstract: A method for producing a metal strip (1) by casting and rolling, wherein first a slab (3) is cast in a caster (2) by dispensing metal from a mold (4), wherein the slab (3) is deflected from the vertical direction to the horizontal direction in the region of a strand guide (5), wherein the slab (3) is then tempered in a furnace (6), wherein the slab (3) is rolled in a rolling train (7) after the furnace (6) and wherein the slab (3) is processed either in discontinuous batch operation or in continuous or semi-continuous operation in dependence on a specified manner of operation. According to the invention, in order to create optimal process conditions for all desired operating modes, the slab (3) to be rolled or the metal strip (1) being rolled is subjected to heating in the region of the rolling train (7) at least between two roll stands (8, 9, 10, 11, 12, 13, 14) by means of an inductor (15).

公开(公告)号：US11239012B2

公开(公告)日：2022-02-01

申请号：US14638338

申请日：2015-03-04

Applicant: SMS Group GmbH

Inventor： Andreas Boettcher ,  Christian Klinkenberg ,  Ingo Schuster

IPC: C21D1/42 ,  H01F1/147 ,  C21D8/12 ,  C21D3/04 ,  C21D6/00 ,  C21D9/52 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  C23C8/02 ,  C23C8/26 ,  H01F41/02

Abstract: A process for producing grain-oriented electrical steel strip by means of thin slab continuous casting and which includes continuously casting the smelt by thin slab continuous casting, subjecting the thin slabs to homogenization annealing at a maximum temperature of 1250° C. and heating to a temperature between 1350° C. and 1380° C., and continuously hot rolling the thin slabs to form a hot-rolled strip, with cooling and reeling the hot-rolled strip to form a coil and cold rolling the hot-rolled strip to a nominal thickness, with subjecting the cold-rolled strip to recrystallization, decarburization and nitridation annealing, which includes a decarburization annealing phase and a subsequent nitridation annealing phase, with an intermediate reduction annealing phase being interposed between the decarburization annealing phase and the nitridation annealing phase, whereby a cold-rolled strip is obtained, which primary recrystallized grains have a circle equivalent mean size (diameter) between 22 μm and 25 μm.