公开(公告)号：US11047020B2

公开(公告)日：2021-06-29

申请号：US16398873

申请日：2019-04-30

Applicant: ArcelorMittal

Inventor： Dongwei Fan ,  Hyun Jo Jun ,  John A. Rotole

IPC: C21D9/46 ,  C21D8/02 ,  C23C2/02 ,  C23C2/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/22 ,  C23C2/40 ,  B32B15/01 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C23C2/12 ,  C22C38/24 ,  C23C2/28

Abstract: A method for producing a cold rolled and hot dip coated steel sheet is provided. The method includes casting a steel into a slab, reheating, hot rolling, cooling, coiling, descaling and cold rolling the slab. The cold rolled steel sheet is annealed so a layer of iron oxide forms on the surface with an internal oxidation underneath. The sheet is then heated so the surface is oxidized and the layer of iron oxide is fully reduced to obtain an internally oxidized depth between 200 nm and 100 μm which includes one or more of Si, Mn, Al, Ti containing oxides. The sheet is then hot dip coated and cooled.

公开(公告)号：US20190256942A1

公开(公告)日：2019-08-22

申请号：US16398873

申请日：2019-04-30

Applicant: ArcelorMittal

Inventor： Dongwei Fan ,  Hyun Jo Jun ,  John A. Rotole

IPC: C21D9/46 ,  C23C2/28 ,  B32B15/01 ,  C22C38/24 ,  C21D8/02 ,  C23C2/40 ,  C23C2/12 ,  C22C38/22 ,  C22C38/08 ,  C22C38/04 ,  C22C38/00 ,  C22C38/38 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/02 ,  C23C2/06 ,  C23C2/02

Abstract: A method for producing a cold rolled and hot dip coated steel sheet is provided. The method includes casting a steel into a slab, reheating, hot rolling, cooling, coiling, descaling and cold rolling the slab. The cold rolled steel sheet is annealed so a layer of iron oxide forms on the surface with an internal oxidation underneath. The sheet is then heated so the surface is oxidized and the layer of iron oxide is fully reduced to obtain an internally oxidized depth between 200 nm and 100 μm which includes one or more of Si, Mn, Al, Ti containing oxides. The sheet is then hot dip coated and cooled.

公开(公告)号：US11827951B2

公开(公告)日：2023-11-28

申请号：US17414400

申请日：2018-12-21

Applicant: ArcelorMittal

Inventor： William P. Umlauf ,  Oscar Lanzi, III ,  Johnny C. Brannbacka ,  John A. Rotole ,  Robert Bing

IPC: C21D9/56 ,  F27D7/06 ,  F27D7/02 ,  F27D21/04 ,  F27D19/00

CPC classification number: C21D9/561 ,  F27D7/02 ,  F27D7/06 ,  F27D21/04 ,  F27D2019/0012 ,  F27D2019/0028

Abstract: A steel strip annealing furnace with a dew point control system. The furnace/control system can be more readily controlled to the desired dew point than the prior art control system and can handle the set point changes required as different types of steel coils are continuously run therethrough.

公开(公告)号：US20170137906A1

公开(公告)日：2017-05-18

申请号：US15316600

申请日：2015-06-03

Applicant: ArcelorMittal

Inventor： Dongwei Fan ,  Hyun Jo Jun ,  John A. Rotole

IPC: C21D9/46 ,  C23C2/06 ,  C23C2/02 ,  C23C2/40 ,  C23C2/28 ,  C22C38/38 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D8/02

Abstract: The invention deals with a cold rolled and hot dip steel sheet, with a tensile strength of at least 980 MPa, with yield strength above or equal to 500 MPa, with total elongation above or equal to 8%, the composition consisting by weight percent: 0.05