公开(公告)号：US12234558B2

公开(公告)日：2025-02-25

申请号：US17861129

申请日：2022-07-08

Applicant: Samuel McAlpine ,  Steven Jepeal

Inventor： Samuel McAlpine ,  Steven Jepeal

IPC: C23C24/08 ,  B22F9/04 ,  B22F9/08 ,  C21D1/34 ,  C21D6/00 ,  C21D8/06 ,  C21D8/08 ,  C21D9/00 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/44 ,  C23C4/00 ,  C23C24/04 ,  C23F17/00

Abstract: In some embodiments, a coating applied to steel reinforcement bar (e.g., steel rebar) that could considerably extend the lifetime of concrete structures by reducing steel rebar corrosion is disclosed. The coating includes a thin, passivating steel (e.g., stainless steel) layer that is applied to the outside of conventional steel rebar. The coating can be applied in-line through metal cold spray manufacturing, which is a high throughput coating technique that can be integrated into existing steel manufacturing plants. Furthermore, a novel, high performance ferritic steel with tailored resistance to corrosion from chlorides is described. The new ferritic steel is distinct from other commercial and experimental steels, and is better suited for coating low-cost steel structures like rebar. Multiple alloying elements including Cr, Al, and Si will each form protective oxides independently, increasing the total amount of protection and extending it over much wider ranges of pH and electrical potential.

公开(公告)号：US12134799B2

公开(公告)日：2024-11-05

申请号：US17603593

申请日：2020-03-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Norifumi Asahara ,  Katsuhiko Kato ,  Mikio Futaka ,  Yasuhiro Tanaka ,  Naoki Kaneko ,  Junichi Nakagawa

IPC: C21C7/00 ,  C21C5/00 ,  C21C5/52 ,  C21C5/54 ,  C22C33/04

Abstract: A charged material containing a metal raw material of at least one of ferrochromium containing metal Si or ferrosilicon and unreduced slag containing Cr oxide generated by oxidation refining is charged into an AC electric furnace including three electrodes, a mass ratio of a metal Si amount to a Cr oxide amount being from 0.30 to 0.40, and a C concentration being from 2.0% by mass to a saturation concentration.

公开(公告)号：US20240344160A1

公开(公告)日：2024-10-17

申请号：US18245337

申请日：2021-01-07

Applicant: Jiangyin Xingcheng Special Steel Works Co., Ltd

Inventor： Zhaoxia LIU ,  Xiaohong XU ,  Yun BAI ,  Pifeng MIAO ,  Jun LIU ,  Buqiang HAN ,  Yonghao ZHOU ,  Jinming WU ,  Jun GAO ,  Guozhong LI ,  Menglong DI ,  Yu MENG ,  Shuquan LIAO ,  Sha LU ,  Liang GAO

IPC: C21D8/02 ,  C21D1/19 ,  C21D9/46 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12

CPC classification number: C21D8/0226 ,  C21D1/19 ,  C21D8/0205 ,  C21D8/0273 ,  C21D9/46 ,  C22C33/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12

Abstract: Disclosed is a method for manufacturing a 5Ni steel plate with a low remanence and an excellent surface quality to be used in a ship. The process flow thereof comprises: converter smelting->LF refining->RH high vacuum degassing->treatment with Ca->continuous casting->a slow cooling treatment to the slab->cleaning the surface of the slab->heating->rolling->quenching twice->tempering. The constituents comprise a low content of carbon, a low content of silicon, and 5% Ni, with V and Nb being added thereto, which improves the hardenability, improves the toughness at a low temperature, and improves the starting temperature of non-recrystallization of austenite. The steel plate can be subjected to high-temperature rolling and high-temperature quenching so as to significantly improve the shape of the plate, thus being applicable to the production of thin products.

公开(公告)号：US12031202B2

公开(公告)日：2024-07-09

申请号：US18330241

申请日：2023-06-06

Applicant: STEER ENGINEERING PRIVATE LIMITED

Inventor： Vijay Shrinivas ,  Thillairajan Arumugam

IPC: C22C38/36 ,  C21D1/18 ,  C21D6/00 ,  C21D7/13 ,  C21D8/00 ,  C22C33/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26

CPC classification number: C22C38/36 ,  C21D1/18 ,  C21D6/002 ,  C21D7/13 ,  C21D8/005 ,  C22C33/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C21D2211/008

Abstract: A high carbon martensitic stainless steel is disclosed. Said high carbon martensitic stainless steel comprises 1.7 to 1.9% by weight C, 17 to 18% by weight Cr, 1.6 to 2.0% by weight Mo, 2.9 to 3.5% by weight V, 0.40 to 0.60% by weight Nb, and Fe as main constituent. Further, the high carbon martensitic stainless steel has a microstructure comprising of primary carbides in an amount of 15 to 30% by volume and secondary carbides in an amount less than 2% by volume.

公开(公告)号：US20240141466A1

公开(公告)日：2024-05-02

申请号：US18407928

申请日：2024-01-09

Applicant: Sandvik Intellectual Property AB

Inventor： Daniel GULLBERG ,  Christina HARALDSSON ,  Anders WILSON ,  Alexander SCHEERDER ,  Kirk OFEI

IPC: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/00 ,  C21D8/00 ,  C21D9/08 ,  C22C33/02 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/08

CPC classification number: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/004 ,  C21D8/005 ,  C21D9/08 ,  C22C33/0285 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/083 ,  B22F3/15 ,  C21D2211/001 ,  C21D2211/005

Abstract: A corrosion resistant duplex stainless steel (ferritic austenitic alloy) is suitable for use in a plant for the production of urea. Uses of the corrosion resistant duplex stainless steel include in objects made of said duplex stainless steel, in methods for the production of urea, in a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and in methods of modifying an existing plant for the production of urea. In one aspect, the composition consists of in weight % (wt %): C 0.010 to 0.015; S 0.08 to 0.23; Mn 1.0 to 1.05; Cr 29.07 to 29.92; Ni 5.76 to 7.17; Mo 3.0 to 4.0; W max 2.55; N 0.3 to 0.35; Cu max 0.01; S max 0.008; P max 0.008; at least one of Ti, Nb, Hf, Ca, Ba, V, and B max 0.5 total; balance Fe and unavoidable occurring impurities.

公开(公告)号：US20240071663A1

公开(公告)日：2024-02-29

申请号：US18458597

申请日：2023-08-30

Applicant: TDK CORPORATION

Inventor： Masakazu HOSONO ,  Kazuhiro YOSHIDOME ,  Akito HASEGAWA ,  Yoshiki KAJIURA

IPC: H01F1/20 ,  B22F1/052 ,  B22F1/06 ,  B22F1/142 ,  B22F3/02 ,  B22F3/24 ,  B22F5/10 ,  B22F9/00 ,  B22F9/08 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34

CPC classification number: H01F1/20 ,  B22F1/052 ,  B22F1/06 ,  B22F1/142 ,  B22F3/02 ,  B22F3/24 ,  B22F5/106 ,  B22F9/007 ,  B22F9/082 ,  C22C33/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/105 ,  C22C38/12 ,  C22C38/16 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  H01F27/255

Abstract: A soft magnetic alloy powder comprises first particles to fifth particles, each having a particle size within a specific range. Among the first particles to the fifth particles, nth particles have an average particle size xn (μm), an average circularity yn, and a variance zn of circularity, where nth is any ordinal number from first to fifth. Points (xn, yn) (n=1 to 5) plotted in an xy plane define an approximate straight line having a slope “my” of −0.0030 or more. Points (xn, zn) (n=1 to 5) plotted in an xz plane define an approximate straight line having a slope “mz” of 0.00050 or less.

公开(公告)号：US20240035126A1

公开(公告)日：2024-02-01

申请号：US18125093

申请日：2023-03-22

Applicant: SHANDONG UNIVERSITY OF TECHNOLOGY ,  HENGLILAI NEW MATERIALS LIMITED

Inventor： Jianchen Cong ,  Yufang Wang

IPC: C22C33/08 ,  C22C33/04 ,  C22C37/04

CPC classification number: C22C33/08 ,  C22C33/04 ,  C22C37/04

Abstract: The invention provides a method for increasing the quality of graphite balls. The method comprises melting molten iron in an electric furnace, increasing the sulfur content in the molten iron during the melting process, and adding rare earth in the electric furnace or in a nodularizing ladle; after the molten iron is completely melted, pouring the molten iron into the nodularizing ladle and nodularizing; and after nodularization, adding ferromanganese to a transfer ladle. In the present invention, sulfur is added to molten iron in advance, and rare earth is added to a nodularizing ladle previously, so that a large number of dispersed rare earth sulfide particles are formed in the molten iron during the nodularization process. Rare earth sulfide particles serve as the nuclei of graphite crystallization to increase the number of graphite balls, and improve the roundness of graphite balls.

公开(公告)号：US20230392224A1

公开(公告)日：2023-12-07

申请号：US18249489

申请日：2021-12-01

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Neeraj S. THIRUMALAI ,  Hyun Jo JUN ,  Adnan OZEKCIN

IPC: C21D8/10 ,  C21D9/14 ,  C21D6/00 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C33/04 ,  C22C38/32 ,  C22C38/48 ,  C22C38/44 ,  C21D9/08

CPC classification number: C21D8/105 ,  C21D9/14 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C22C33/04 ,  C22C38/32 ,  C22C38/48 ,  C22C38/44 ,  C21D9/085 ,  C21D2211/002 ,  C21D2211/001

Abstract: The present disclosure relates to methods and treatments of linepipe steels that transport one or both of crude oil and natural gas. More particularly, the present disclosure relates to sulfide stress cracking resistance of carbon steels for use as linepipe in transporting crude oil and natural gas by alternative thermo-mechanically controlled and/or one or more additional heat treatment processes.

公开(公告)号：US11819957B2

公开(公告)日：2023-11-21

申请号：US17044047

申请日：2020-06-03

Applicant: Jiangsu University

Inventor： Rui Luo ,  Zhizhong Yuan ,  Xiaonong Cheng ,  Leli Chen ,  Tian Liu ,  Qi Zheng ,  Yun Cao

IPC: B23K35/30 ,  B23K35/02 ,  B23K35/40 ,  C21D7/13 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/54 ,  B23K103/00 ,  B23K103/04 ,  B23K9/167

CPC classification number: B23K35/3066 ,  B23K35/0261 ,  B23K35/40 ,  C21D7/13 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/54 ,  B23K9/167 ,  B23K2103/04 ,  B23K2103/50

Abstract: The present disclosure belongs to the technical field of welding materials, and in particular relates to a Fe—Ni based alloy welding wire for welding 800H alloy and a preparation method thereof and a method for welding 800H alloy. The Fe—Ni based alloy welding wire for welding 800H alloy provided by the present disclosure has a reasonable chemical components, and after being used to weld 800H alloy, the obtained weld has a tensile strength of 557.6 MPa and an elongation of 37.5% at ambient temperature, and has a tensile strength of 420 MPa and an elongation of 17.25% at a temperature of 650° C.

公开(公告)号：US11767581B2

公开(公告)日：2023-09-26

申请号：US17966900

申请日：2022-10-17

Applicant: North China University of Science and Technology

Inventor： Jimeng Liu ,  Shuhuan Wang ,  Dingguo Zhao ,  Yuekai Xue ,  Hao Li ,  Cunshuai Zhang

IPC: C22C38/00 ,  C22C38/02 ,  C22C38/22 ,  C22C38/28 ,  C22C38/04 ,  C21D8/02 ,  B21J1/06 ,  C22C33/04

CPC classification number: C22C38/001 ,  B21J1/06 ,  C21D8/0226 ,  C22C33/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/28

Abstract: The present invention discloses a high nitrogen steel with high strength, low yield ratio and high corrosion resistance for ocean engineering, comprising the following chemical components by weight percentage: C≤0.01%, Si≤0.1%, Cr 17%-19%, Mn 14%-16%, Mo 1%-1.5%, Ti≤0.05%, N 0.45%-0.6%, P≤0.01%, S≤0.01%, O≤0.02%, and the balance of iron. The present invention also discloses a preparation method as follows: (1) raw material weighing; (2) ingot preparation, remelting and smelting; (3) solution and forging treatments; and (4) hot rolling and post-rolling treatment. A product provided by the present invention has high tensile strength, low yield ratio and high corrosion resistance. At the same time, the present invention does not need pressurized equipment in the preparation process, therefore the preparation method is simple, the cost is low, and the present invention is suitable for industrial popularization in China.