公开(公告)号：US11835089B2

公开(公告)日：2023-12-05

申请号：US17366158

申请日：2021-07-02

Applicant: Aktiebolaget SKF

Inventor： Rudolf Hauleitner ,  Mohamed Sherif

IPC: F16C33/10 ,  F16C17/02 ,  C22C38/00 ,  C21D9/40 ,  C21D6/00 ,  C21D1/773 ,  C21D1/74 ,  C21D11/00 ,  C21D1/613 ,  C21D1/18

CPC classification number: F16C33/1025 ,  C21D1/18 ,  C21D1/613 ,  C21D1/74 ,  C21D1/773 ,  C21D6/00 ,  C21D9/40 ,  C21D11/00 ,  C22C38/001 ,  F16C17/02 ,  C21D2201/00 ,  C21D2211/001 ,  C21D2241/00 ,  F16C2204/60

Abstract: A bearing assembly, particularly refrigerant lubricated bearing assembly, having at least an inner ring and an outer ring, which are rotatable to each other. At least one bearing ring is made from a nitrogen-alloyed stainless steel having a nitrogen (N) content of more than 0.6 wt.-%. A method for manufacturing such a bearing ring is also provided.

公开(公告)号：US20230383374A1

公开(公告)日：2023-11-30

申请号：US17873926

申请日：2022-07-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  Northeastern University

Inventor： Zhou WANG ,  Zhisong CHAI ,  Wei XU ,  Jianfeng WANG

IPC: C21D9/46 ,  C21D6/00 ,  C21D1/613 ,  C22C38/48 ,  C22C38/46 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/50

CPC classification number: C21D9/46 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D1/613 ,  C22C38/48 ,  C22C38/46 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/50 ,  C21D2211/008 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005

Abstract: The present disclosure provides a method for preparing a steel alloy sheet to enhance flatness. The method includes, inter alia, heating a steel alloy material to a first temperature that is greater than a full-austenitization point for the steel alloy material; holding steel alloy material at the first temperature for a period greater than or equal to about 1 second to less than or equal to about 10,000 seconds to from a precursor steel sheet; air quenching the precursor steel sheet to a second temperature that is less than the first temperature and greater than martensitic transformation starting temperature for the steel alloy material; and cooling the precursor steel sheet to room temperature to prepare the steel alloy sheet. The steel alloy material includes greater than or equal to about 0.5 wt. % to less than or equal to about 6 wt. % of chromium.

公开(公告)号：US20230227929A1

公开(公告)日：2023-07-20

申请号：US18115057

申请日：2023-02-28

Applicant: General Electric Company

Inventor： Theodore Francis Majka

IPC: C21D9/00 ,  C21D1/613 ,  C21D6/00 ,  C22C38/44 ,  C22C38/52

CPC classification number: C21D9/0068 ,  C21D1/613 ,  C21D6/004 ,  C22C38/44 ,  C22C38/52 ,  C21D2211/008

Abstract: A method of making a forged, martensitic, stainless steel alloy is provided. The alloy is a forged preform of martensitic, pitting corrosion resistant stainless steel alloy comprising, by weight: 12.0 to 16.0 percent chromium; greater than 16.0 to 20.0 percent cobalt, 6.0 to 8.0 percent molybdenum, 1.0 to 3.0 percent nickel, 0.02 to 0.04 percent carbon; and the balance iron and incidental impurities. The alloy has a microstructure that comprises a retained austenite phase less than or equal to 2 percent by volume of the microstructure. The method heats the preform to a solutionizing temperature to form a solutionized microstructure. The preform is cooled with a liquid to room temperature at a rate of no less than 0.25° C./sec. to prevent formation of sigma phase. The preform is immersed in a cryo-liquid to transform the retained austenite phase in the microstructure to martensite. The preform is heated to a temperature of less than 600° F. for a time sufficient to form a tempered forged preform.

公开(公告)号：US11508519B2

公开(公告)日：2022-11-22

申请号：US16620712

申请日：2018-10-09

Applicant: Fujian Changting Golden Dragon Rare-Earth Co., Ltd.

Inventor： Qingjiang Wang ,  Ying Luo ,  Jianpeng Wu

IPC: H01F41/02 ,  C21D9/00 ,  C21D1/773 ,  C21D1/613 ,  B22F3/24 ,  F27B9/02 ,  F27D9/00 ,  H01F1/057 ,  F27B5/02 ,  F27B5/04 ,  F27B5/18 ,  H01L21/67 ,  F27B5/06

Abstract: Disclosed are a continuous heat treatment device and method for a sintered Nd—Fe—B magnet workpiece. The device comprises a first heat treatment chamber, a first cooling chamber, a second heat treatment chamber, and a second cooling chamber continuously disposed in sequence, as well as a transfer system disposed among the chambers to transfer the alloy workpiece or the metal workpiece; both the first cooling chamber and the second cooling chamber adopt a air cooling system, wherein a cooling air temperature of the first cooling chamber is 25° C. or above and differs from a heat treatment temperature of the first heat treatment chamber by at least 450° C.; a cooling air temperature of the second cooling chamber is 25° C. or above and differs from a heat treatment temperature of the second heat treatment chamber by at least 300° C. The continuous heat treatment device and method can improve the cooling rate and production efficiency and improve the properties and consistency of the products.

公开(公告)号：US11306371B1

公开(公告)日：2022-04-19

申请号：US16159811

申请日：2018-10-15

Applicant: DANTE Solutions, Inc.

Inventor： Justin Sims ,  Blake Lynn Ferguson ,  Zhichao Li

IPC: C21D11/00 ,  C21D1/613

Abstract: Described herein is a method for quenching a hot metal part. The method may comprise selecting a first node located at about a slowest cooling point of the metal part and a second node located at about a fastest cooling portion of the metal part. The method may also comprise quenching the metal part to a finish temperature with the requirement that there is a temperature difference of between about 5° C. and about 30° C. during a quench cycle. The quench cycle may start from a first time when the second node is about 5° C. above a martensite start temperature of the specific metal or metal alloy of the metal part, and end at a second time when the first node is at a temperature which is about or below a martensite finish temperature of the specific metal or metal alloy.

公开(公告)号：US10927426B2

公开(公告)日：2021-02-23

申请号：US16090781

申请日：2016-04-05

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Hirohisa Kawamura

IPC: C21D1/667 ,  F27D9/00 ,  C21D1/613 ,  C21D9/46 ,  C21D11/00

Abstract: Cooling equipment comprising: a plurality of injection units in a continuous annealing furnace including heating zone, soaking zone, and cooling zone through which strip-shaped steel sheet is sequentially fed, the injection units arranged in cooling zone in row along feed direction of steel sheet and injecting, from injection nozzles, cooling gas containing hydrogen, onto steel sheet; and hydrogen concentration adjustment unit adjusts hydrogen concentration of cooling gas such that hydrogen concentration distribution is formed in which, in a space of the cooling zone where plurality of injection units are disposed, hydrogen concentration at upstream region is higher than hydrogen concentration at downstream region; plurality of injection nozzles arranged along feed direction of steel sheet, and each of injection nozzles extending toward steel sheet; and injection nozzles positioned at both sides in array direction inclined to slope toward a center of the array direction on progression toward tips of injection nozzles.

公开(公告)号：US10907228B2

公开(公告)日：2021-02-02

申请号：US16227543

申请日：2018-12-20

Applicant: The Boeing Company

Inventor： Ravi Verma

IPC: C21D1/84 ,  C21D7/13 ,  C21D1/613 ,  C21D1/673 ,  C21D8/06 ,  C21D9/00

Abstract: Described is a method of modifying material properties of a workpiece using a high-pressure-torsion apparatus, comprising a working axis, a first anvil, a second anvil, and an annular body, comprising a first conductive chiller, a second conductive chiller, and a heater, positioned between the first conductive chiller and the second conductive chiller along the working axis. The method comprises compressing the workpiece along a central axis of the workpiece and, simultaneously with compressing the workpiece alone the central axis, twisting the workpiece about the central axis. The method further comprises, while compressing the workpiece along the central axis and twisting the workpiece about the central axis, translating the annular body along the working axis of the high-pressure-torsion apparatus, collinear with the central axis of the workpiece, and heating the workpiece with the heater.

公开(公告)号：US20190382858A1

公开(公告)日：2019-12-19

申请号：US16393985

申请日：2019-04-25

Applicant: Consolidated Engineering Company, Inc.

Inventor： Scott P. Crafton

IPC: C21D1/613 ,  C21D1/62 ,  C21D9/00

Abstract: A quench system for applying cooling air to one or more hot metallic components that are supported on a component support having a substantially open construction. The quench system includes a housing having sidewalls that define a cooling chamber with peripheral portions proximate the sidewalls and a center portion spaced inwardly from the sidewalls. The quench system also includes a conveyance system that is configured to carry the component support into the center portion of the cooling chamber, as well as a forced air fan that generates a bulk flow of cooling air through the cooling chamber. The quench system further includes a plurality of nozzle baffles extending inwardly from the plurality of sidewalls to define a narrowing region within the housing between the forced air fan and the conveyance system, whereby, during operation of the fan, cooling air flowing through the peripheral portions of the cooling chamber is redirected into the center portion of the cooling chamber.

公开(公告)号：US10479039B2

公开(公告)日：2019-11-19

申请号：US15555589

申请日：2016-03-03

Applicant: FUJICO CO., LTD.

Inventor： Kazumasa Yoshitani ,  Takashi Kikuchi ,  Hyo-Gyoung Kang ,  Hiroaki Furuta

IPC: B30B11/16 ,  B22D11/00 ,  C21D1/18 ,  C22C38/02 ,  B22D19/16 ,  C21D1/613 ,  C21D6/00 ,  C21D9/38 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24

Abstract: A novel briquetting roll having excellent performance such as providing both abrasion resistance and spalling resistance, which can also be manufactured at low cost and in a short period of time, and a method for manufacturing the same, are provided wherein the briquetting roll 1 integrally has an inner layer material 4 and an outer layer material 5, which comprise mutually different materials and are in contact with each other at the respective exterior and interior thereof, and has pockets 6 formed at the outer circumference of the outer layer material 5. A chromium-molybdenum forged steel material is used for the inner layer material 4 and a high-carbon high-speed steel material is used for the outer layer material 5. The outer layer material 5 may be formed on the outside of the inner layer material 4 by a continuous pouring process.

公开(公告)号：US20190276913A1

公开(公告)日：2019-09-12

申请号：US16426307

申请日：2019-05-30

Applicant: POSCO

Inventor： Jai-Hyun KWAK ,  Kyoo-Young LEE ,  Hang-Sik CHO ,  Joo-Hyun RYU ,  Man-Young PARK

IPC: C21D9/52 ,  C21D1/60 ,  C21D9/56 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D1/34 ,  C22C38/14 ,  C21D1/613 ,  C21D1/773 ,  C21D9/60 ,  C22C38/00 ,  C21D1/26 ,  C21D9/573 ,  C21D1/40 ,  C21D1/52 ,  C21D1/42

Abstract: Provided is a method of continuously annealing a strip. The method includes: firstly heating a strip in a first heating zone; firstly cooling the firstly heated strip or maintaining the firstly heated strip at a constant temperature in a first cooling or constant temperature maintaining zone; secondarily heating and soaking the strip, firstly cooled or remaining at the constant temperature, in a second heating and soaking zone; and secondarily cooling the strip, secondarily heated and soaked, in a second cooling zone.