公开(公告)号：US12053815B2

公开(公告)日：2024-08-06

申请号：US16349883

申请日：2017-11-15

Applicant: Salzgitter Flachstahl GmbH

Inventor： Ingwer Denks ,  Stefan Mütze ,  Christian Pelz

IPC: B21D53/88 ,  C21D8/02 ,  C21D9/00 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/40 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

CPC classification number: B21D53/88 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/0068 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/40 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C21D2221/00

Abstract: The invention relates to a method for producing a chassis part from micro-alloyed steel, having an improved cold workability of cold-solidified, mechanically separated sheet-metal edges, comprising the following method steps: —providing a hot-rolled strip or a hot-rolled strip sheet of the claimed alloy composition in weight percent, cutting a blank at room temperature and optionally carrying out further punching or cutting operations, —heating exclusively the sheet metal edge regions of the blank, which have been cold-solidified by the cutting or punching operations, to a temperature of at least 700° C. with a dwell time of at most 10 seconds and subsequent cooling with air, —cold forming the blank in one or more steps to form a chassis part at room temperature.

公开(公告)号：US20240247463A1

公开(公告)日：2024-07-25

申请号：US18627302

申请日：2024-04-04

Applicant: ESCO GROUP LLC

Inventor： Robin K. Churchill ,  Michael B. Roska ,  Ulf Daniel Widlund

IPC: E02F3/60 ,  C21D6/00 ,  C21D9/00 ,  E02F3/40

CPC classification number: E02F3/60 ,  C21D6/004 ,  C21D9/0068 ,  E02F3/40 ,  C21D2211/008

Abstract: A cast lip for an excavating bucket composed of a ferrous alloy having at least seven percent chromium by weight, 3%-6% nickel by weight, and ≤0.12% carbon by weight, and a primarily martensitic structure.

公开(公告)号：US12000017B2

公开(公告)日：2024-06-04

申请号：US17523087

申请日：2021-11-10

Applicant: MM Metals USA, LLC

Inventor： Daniel Shaw ,  James Saville ,  John Williams ,  Trevor N. Mustoe

IPC: C22B5/04 ,  C21D1/74 ,  C21D6/00 ,  C21D8/12 ,  C21D9/00 ,  C22B1/24 ,  C22C33/04 ,  C22C38/18

CPC classification number: C22B5/04 ,  C21D1/74 ,  C21D6/002 ,  C21D8/1205 ,  C21D9/0025 ,  C21D9/0068 ,  C22B1/24 ,  C22C33/04 ,  C22C38/18

Abstract: A method and system for recovering a high yield of low carbon ferroalloy, e.g., low carbon ferrochrome, from chromite and low carbon ferrochrome produced by the method. A stoichiometric mixture of feed materials including scrap aluminum granules, lime, silica sand, and chromite ore are provided into a plasma arc furnace. The scrap aluminum granules are produced from used aluminum beverage containers. The feed materials are heated, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxide in the chromite to produce molten low carbon ferrochrome with molten slag floating thereon. The molten low carbon ferrochrome is extracted, solidified and granulated into granules of low carbon ferrochrome. The molten slag is extracted, solidified and granulated into granules of slag.

公开(公告)号：US11905568B2

公开(公告)日：2024-02-20

申请号：US17923906

申请日：2021-05-07

Applicant: AUTOTECH ENGINEERING S.L.

Inventor： Ricardo Molina Mesa

IPC: C21D8/02 ,  C21D9/00

CPC classification number: C21D8/0294 ,  C21D8/0205 ,  C21D9/0068

Abstract: A system configured for deformation compensation in real time during a heat treatment performed on a component. The system comprises a supporting structure; two or more clamping devices arranged with the supporting structure, one or more clamping devices including a clamp, a load cell and a motor; and a processing and control system configured to collect signals from a load cell and to send signals based on the detected loads to a motor to compensate for deformation due to the heat treatment.

公开(公告)号：US11904946B2

公开(公告)日：2024-02-20

申请号：US17719471

申请日：2022-04-13

Applicant: Bayerische Motoren Werke Aktiengesellschaft

Inventor： Sebastian Schnapp ,  Martin Sittenberger

IPC: B62D25/04 ,  B62D29/00 ,  B21D22/26 ,  C21D9/00

CPC classification number: B62D25/04 ,  B21D22/26 ,  B62D29/007 ,  C21D9/0068 ,  C21D2221/00

Abstract: A press-hardened shaped sheet-metal part, in particular a pillar reinforcement for a motor vehicle bodyshell, which has different sheet thicknesses and strengths, with an unhardened first region, or a first region which is hardened only to a small extent, and with a press-hardened second region, wherein the second region has a larger or smaller sheet thickness than the first region. A transition region, which, starting from the first region, has a sheet thickness transition zone, an intermediate zone, and a strength transition zone, is formed between the first region and the second region.

公开(公告)号：US11834734B2

公开(公告)日：2023-12-05

申请号：US17564582

申请日：2021-12-29

Applicant: Hsiang Wu

Inventor： Hsiang Wu

IPC: C22C38/44 ,  C23C22/00 ,  C21D9/00 ,  C22C38/00

CPC classification number: C22C38/44 ,  C21D9/0068 ,  C22C38/001 ,  C23C22/00

Abstract: A method of manufacturing a stainless steel fastener includes following operations. Firstly, a stainless steel blank is prepared and contains from 1 to 3.5 wt % molybdenum, from 10 to 16 wt % chromium, from 0.5 to 3.5 wt % nickel, from 0.05 to 0.3 wt % nitrogen, carbon which is not more than 0.2 wt %, iron, and other inevitable compositions. Initially, a steel crystalline structure of the blank is martensite whose hardness ranges from 230 to 350 HV. Then, the blank is annealed to transform a partial crystalline structure of the steel crystalline structure into ferrite. The annealed blank experiences a cutting operation, a head forming operation, and a thread forming operation sequentially. Thereafter, a heat treating operation is executed to transform the partial crystalline structure from ferrite into martensite to complete a stainless steel fastener whose hardness is increased and is at least 500 HV, which facilitates a direct drilling effect.

公开(公告)号：US20230366055A1

公开(公告)日：2023-11-16

申请号：US18226219

申请日：2023-07-25

Applicant: Hebei Vocational University of Industry and Technology

Inventor： Shuang LI ,  Zhen CAO ,  Zhen WANG ,  Long LIU ,  Yanlin SHI ,  Xiaocai YANG ,  Zhen YANG ,  Lun ZHANG ,  Yingli HUA ,  Mingmei XIA

IPC: C21D9/00 ,  C22C38/12 ,  C22C38/10 ,  C22C38/02 ,  C22C38/00 ,  C22C38/04 ,  C22C33/04 ,  C21D8/00 ,  C21D6/00 ,  C21D1/18 ,  C21D1/84 ,  C23F17/00

CPC classification number: C21D9/0068 ,  C22C38/12 ,  C22C38/10 ,  C22C38/02 ,  C22C38/005 ,  C22C38/002 ,  C22C38/04 ,  C22C33/04 ,  C21D8/005 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D1/18 ,  C21D1/84 ,  C23F17/00 ,  C21D2211/002 ,  C23C8/26

Abstract: A method for preparing a Bainite hot-working die, includes: 1) weighing and mixing alloy raw materials including: C: 0.50-0.60%, Si: 0.20-0.25%, Mn: 1.00-1.50%, W: 2.10-3.00%, Mo: 3.50-5.00%, V: 0.50-1.00%, Co: 0.60-1.10%, P≤0.02%, rare earth (RE): 0.01-0.10%, (RE)/(S)>3.0, (RE)×(S)

公开(公告)号：US20230332658A1

公开(公告)日：2023-10-19

申请号：US17721661

申请日：2022-04-15

Applicant: GM Global Technology Operations LLC

Inventor： Benjamin Everest Slattery ,  Kevin P. Callaghan ,  Mark T. Riefe

IPC: F16D65/12 ,  B23K26/359 ,  C21D9/00 ,  C21D1/18

CPC classification number: F16D65/127 ,  B23K26/359 ,  F16D65/125 ,  C21D9/0068 ,  C21D1/18 ,  F16D2250/0053 ,  F16D2250/0046 ,  F16D2200/0017 ,  C21D2211/008 ,  C23C8/32

Abstract: Systems and methods of making an enhanced brake rotor having enhanced wear resistance are provided. The systems and methods provide a vehicular rotor comprising a base comprising iron (Fe). The base comprises an outer surface having a laser-hardened portion thereon. The laser-hardened portion comprises martensite and having a thickness of between 10 and 100 microns of the outer surface to define the enhanced brake rotor with enhanced wear resistance.

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：US20190211832A1

公开(公告)日：2019-07-11

申请号：US15863167

申请日：2018-01-05

Applicant: United Technologies Corporation

Inventor： Daniel A. Bales ,  Andrew L. Haynes ,  Luke H. Rettberg

IPC: F04D29/02 ,  B23K20/12 ,  C22F1/18 ,  C22F1/10 ,  F04D29/32

CPC classification number: C21D9/50 ,  C21D9/0006 ,  C21D9/0068 ,  C22F1/10 ,  C22F1/183

Abstract: A tool for simultaneous local stress relief of each of a multiple of linear friction welds includes a columnar track defined along an axis, the columnar track having a helical slot; and a support structure engaged with the helical slot to translate and rotate a heat treat fixture portion along the axis.