公开(公告)号：US11773465B2

公开(公告)日：2023-10-03

申请号：US16944377

申请日：2020-07-31

Applicant: NUCOR CORPORATION

Inventor： Kishlay Mishra ,  Paul Kelly ,  Tao Wang

IPC: B21D22/22 ,  C21D9/52 ,  C22C38/46 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C22C38/48 ,  B21D22/02 ,  C21D9/48 ,  C21D9/56

CPC classification number: C21D9/52 ,  B21D22/022 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0215 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D9/48 ,  C21D9/563 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C21D2211/002 ,  C21D2211/008

Abstract: Disclosed herein is a light-gauge, ultra-high strength weathering steel sheet with a composition, material properties, and surface characteristics that make it suitable for hot-stamping applications and making hot-stamped products. Also disclosed herein is a high friction rolled carbon alloy steel strip free of prior austenite grain boundary depressions and having a smear pattern. Still further disclosed herein is a high friction rolled carbon alloy steel strip that has been surface homogenized to provide a thin cast steel strip free of a smear pattern.

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：US11846004B2

公开(公告)日：2023-12-19

申请号：US16984475

申请日：2020-08-04

Applicant: NUCOR CORPORATION

Inventor： Brian Hansen Bogh ,  Kishlay Mishra ,  Tao Wang

IPC: C22C38/04 ,  C21D9/52 ,  C22C38/46 ,  C22C38/42 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C22C38/48 ,  B21D22/02 ,  C21D9/48 ,  C21D9/56

CPC classification number: C21D9/52 ,  B21D22/022 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0215 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D9/48 ,  C21D9/563 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C21D2211/002 ,  C21D2211/008

Abstract: Disclosed herein is a light-gauge, ultra-high strength weathering steel pile for use as a steel foundation in structures such as, for example, solar arrangements. The light-gauge, ultra-high strength weathering steel pile comprises a thickness of 2.5 mm or less that has been cold roll formed into a steel pile having a web and a pair of opposing flanges, each having discontinuities formed therein. The steel pile further comprises a yield strength of between 700 and 1600 MPa, a tensile strength of between 1000 and 2100 MPa, and an elongation of between 1% and 10%.

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.