公开(公告)号：US11542567B2

公开(公告)日：2023-01-03

申请号：US16934168

申请日：2020-07-21

Applicant: NUCOR CORPORATION

Inventor： Tao Wang ,  Kishlay Mishra ,  Jeffery Edward Keffer

IPC: C21D8/02 ,  C21D9/46 ,  B21B27/10 ,  B21B45/00 ,  B21B45/02 ,  B21B3/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/12 ,  C22C38/60 ,  C22C38/42

Abstract: Described herein are thin metal strips having hot rolled exterior side surfaces characterized as being primarily or substantially free of all prior austenite grain boundaries, or at least primarily or substantially free of all prior austenite grain boundaries, and including elongated surface structure. As a result, because the prior austenite grain boundaries are not primarily or substantially present, all such prior austenite grain boundaries are not susceptible to grain boundary etching due to acid etching or pickling. In particular examples, the thin metal strips undergo hot rolling performed with a coefficient of friction equal to or greater than 0.20 with or without use of lubrication.

公开(公告)号：US11148193B2

公开(公告)日：2021-10-19

申请号：US16909287

申请日：2020-06-23

Applicant: NUCOR CORPORATION

Inventor： Robert Nooning, Jr. ,  Harold Bradley Rees ,  Jeffery Edward Keffer

IPC: B22D11/16 ,  B22D11/06 ,  B22D11/14 ,  B22D11/18

Abstract: Systems and apparatus for continuously casting thin strip where one or more expansion rings are positioned within at least one of a pair of casting rolls, and automatically measuring a thickness of the cast strip close to the first side edge of the strip using at least one sensor. If the thickness measured is too thin, automatically decreasing the radial dimension of the expansion ring arranged in close proximity to the first side edge to cause the cylindrical tube to contract and increase the thickness of the cast strip during casting. If the thickness measured indicates that the thickness of the cast strip is too thick, automatically increasing the radial dimension of the expansion ring arranged in close proximity to the first side edge to cause the cylindrical tube to expand and reduce the thickness of the cast strip during casting.

公开(公告)号：US10815544B2

公开(公告)日：2020-10-27

申请号：US16376726

申请日：2019-04-05

Applicant: NUCOR CORPORATION

Inventor： Tao Wang ,  Kishlay Mishra ,  Jeffery Edward Keffer

IPC: C21D8/02 ,  B21B45/02 ,  C21D9/46 ,  B21B27/10 ,  B21B45/00 ,  B21B3/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/12 ,  C22C38/60 ,  C22C38/42

Abstract: Described herein are thin metal strips having hot rolled exterior side surfaces characterized as being primarily or substantially free of all prior austenite grain boundaries, or at least primarily or substantially free of all prior austenite grain boundaries, and including elongated surface structure. As a result, because the prior austenite grain boundaries are not primarily or substantially present, all such prior austenite grain boundaries are not susceptible to grain boundary etching due to acid etching or pickling. In particular examples, the thin metal strips undergo hot rolling performed with a coefficient of friction equal to or greater than 0.20 with or without use of lubrication.

公开(公告)号：US10722940B2

公开(公告)日：2020-07-28

申请号：US16009568

申请日：2018-06-15

Applicant: NUCOR CORPORATION

Inventor： Robert G. Nooning, Jr. ,  Harold Bradley Rees ,  Jeffery Edward Keffer

IPC: B22D11/16 ,  B22D11/14 ,  B22D11/06 ,  B22D11/18

Abstract: Methods and apparatus for continuously casting thin strip where one or more expansion rings are positioned within at least one of a pair of casting rolls, and automatically measuring a thickness of the cast strip close to the first side edge of the strip using at least one sensor, and if the thickness measured is too thin, automatically decreasing the radial dimension of the expansion ring arranged in close proximity to the first side edge to cause the cylindrical tube to contract and increase the thickness of the cast strip during casting, and if the thickness measured indicates that the thickness of the cast strip is too thick, automatically increasing the radial dimension of the expansion ring arranged in close proximity to the first side edge to cause the cylindrical tube to expand and reduce the thickness of the cast strip during casting.