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：US20230340646A1

公开(公告)日：2023-10-26

申请号：US17853410

申请日：2022-06-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Henry ZHAN ,  Zhou WANG ,  Jianfeng WANG

IPC: C22C21/02

CPC classification number: C22C21/02

Abstract: An aluminum alloy and shaped aluminum alloy parts cast therefrom. The aluminum alloy including, by mass, ≥about 6.5% to ≤about 8% silicon, ≥about 0.1% to ≤about 0.35% magnesium, ≥about 0.2% to ≤about 0.25% iron, ≥about 0.05% to ≤about 0.15% manganese, and ≥about 0.1% to ≤about 0.2% chromium. The mass percentage of iron (Fe%), the mass percentage of manganese (Mn %), and the mass percentage of chromium (Cr %) in the aluminum alloy satisfy the relationships: (i) [Mn %+(a×Cr %)]/Fe %>1, and (ii) Fe %+(b×Mn %)+(c×Cr %)>0.6%, where about 1.3≤a≤about 1.7, about 1.2≤b≤about 1.7, and about 2.5≤c≤about 2.9.

公开(公告)号：US20250075301A1

公开(公告)日：2025-03-06

申请号：US18788958

申请日：2024-07-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Zhou WANG ,  Jiachen PANG ,  Lianqian LIU ,  Hongliang YI ,  Jianfeng WANG

IPC: C22C38/42 ,  C21D1/18 ,  C21D6/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C23C8/28

Abstract: A tool steel comprises iron (Fe); carbon (C) in a range from 0.001 wt % to 0.1 wt %; copper (Cu) in a range from 0.2 wt % to 2.0 wt %; nickel (Ni) in a range from 3 wt % to 10 wt %; aluminum (Al) in a range from 0.5 wt % to 3 wt %; manganese (Mn) in a range from 0.2 wt % to 1.5 wt %; chromium (Cr) in a range from 0 to 1.5 wt %; molybdenum (Mo) in a range from 0 to 1.5 wt %; tungsten (W) in a range from 0 to 1.5 wt %; and niobium (Nb) in a range from 0 to 0.2 wt %. A transition layer is arranged on the steel substrate. Metal of the transition layer includes Ni in a range from 5 to 20 wt % copper in a range from 1 to 5 wt %. One of an oxide layer and an oxide/nitride layer is arranged on the transition layer.

公开(公告)号：US20250073770A1

公开(公告)日：2025-03-06

申请号：US18777243

申请日：2024-07-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Zhou WANG ,  MingFeng SHI ,  Sarah TEDESCO ,  Shane Michael ANDERSON ,  Jason J. CORYELL ,  Daniel BAKER ,  Jianfeng WANG ,  Jiachen PANG ,  Zhen CHEN

IPC: B21D22/02 ,  C21D9/00

Abstract: A method for manufacturing a coating-free press hardening steel (CFPHS) component comprises heating a CFPHS blank at a first predetermined heating rate to a first predetermined temperature in a first predetermined temperature range using a heater; transferring the CFPHS blank to a furnace; soaking the CFPHS blank in the furnace at a second predetermined temperature in a second predetermined temperature range for a predetermined period; and pressing and forming the CFPHS blank in a stamp/press to form a CFPHS component.

公开(公告)号：US20250075282A1

公开(公告)日：2025-03-06

申请号：US18789217

申请日：2024-07-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Zhou WANG ,  Zhao Li ,  Wei Xu ,  Jianfeng Wang

IPC: C21D9/00 ,  B23K26/24 ,  B32B15/04 ,  B32B15/18 ,  C21D1/18 ,  C21D6/00 ,  C21D8/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/34 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

Abstract: A method for manufacturing a component includes providing a first PHS blank including an aluminum silicon (AlSi) coating; providing a second PHS blank, wherein the second PHS blank includes chromium (Cr) at a higher concentration than the first PHS blank and does not include the aluminum silicon (AlSi) coating; welding the first PHS blank to the second PHS blank to form a welded blank including a weld seam between the first PHS blank and the second PHS blank; transferring the welded blank to a furnace; heat soaking the welded blank in the furnace at a predetermined temperature for a predetermined period; and pressing, forming, and quenching the welded blank in a stamp/press to form a component.

公开(公告)号：US20240229182A1

公开(公告)日：2024-07-11

申请号：US18364840

申请日：2023-08-03

Applicant: GM Global Technology Operations LLC

Inventor： Zhou WANG ,  Zhisong Chai ,  Wei Xu ,  Jianfeng Wang

IPC: C21D9/46 ,  B32B15/01 ,  C21D1/74 ,  C21D1/84 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/06 ,  C23C2/40

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D1/74 ,  C21D1/84 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/06 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A coated steel sheet includes a steel sheet comprising iron (Fe); carbon (C) in a range from 0.05% to 0.35 wt. %; manganese (Mn) in a range from 0.1% to less than 2 wt. %; chromium (Cr) in a range from 1.2% to 6.0 wt. %; silicon (Si) in a range from 0.01% to less than 0.6 wt. %; aluminum (Al) in a range from 0.5% to 1.3 wt. %; vanadium (V) in a range from 0.01% to 0.5 wt. %; niobium (Nb) in a range from 0.01% to 0.2 wt. %; and titanium (Ti) in a range from 0.01% to 0.3 wt. %. A zinc coating is formed on an outer surface of the steel sheet.

公开(公告)号：US20240033816A1

公开(公告)日：2024-02-01

申请号：US17947769

申请日：2022-09-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  Easyforming Steel Technology Co Ltd

Inventor： Zhou WANG ,  Hongliang YI ,  Jianfeng WANG ,  Lianqian LIU

IPC: B22D17/22 ,  B22D17/08 ,  C22C38/16 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04

CPC classification number: B22D17/2209 ,  B22D17/08 ,  C22C38/16 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04

Abstract: A die casting mold may be made of an iron alloy including, by mass: about 1% to about 6% nickel, about 0.1% to about 5% copper, about 0.2% to about 2.5% aluminum, about 0.5% to about 2% manganese, and about 0.05% to about 0.2% carbon. The iron alloy may be formed into an initial shape of the die casting mold, heated to a temperature greater than or equal to about 900° C. and then cooled to form a supersaturated solid solution of iron and dissolved alloying elements. Then, the iron alloy may be heated at a temperature sufficient to precipitate intermetallic nanoparticles from the supersaturated solid solution to form an intermetallic precipitate phase dispersed throughout an iron-based matrix phase. A layer of iron alloy material disposed at and along a surface of the iron alloy may exhibit a deformed microstructure indicative of a machining direction.