公开(公告)号：US20230381845A1

公开(公告)日：2023-11-30

申请号：US17872766

申请日：2022-07-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Henry ZHAN ,  Congjie WANG

IPC: B21C23/00 ,  C22C23/00 ,  C22F1/06

CPC classification number: B21C23/002 ,  C22C23/00 ,  C22F1/06

Abstract: The present disclosure provides a method of forming an extruded billet from a coarse-grained magnesium alloy billet. The method includes extruding the coarse-grained magnesium alloy biller at temperatures greater than or equal to about 300° C. to less than or equal to about 360° C. to from the extruded billet. The coarse-grained magnesium alloy billet has an average grain size greater than or equal to about 800 μm, and has a low aluminum content. The coarse-grained magnesium alloy billet includes greater than or equal to about 0.5 wt. % to less than or equal to about 3 wt. % of aluminum. The extruded billet may have a plurality of twins with lenticular morphology, which occupies an area fraction greater than or equal to about 20% of a total area of the extruded billet.

公开(公告)号：US20230383385A1

公开(公告)日：2023-11-30

申请号：US17877024

申请日：2022-07-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Congjie WANG ,  Henry ZHAN ,  Michael J. LAUCKNER

IPC: C22C23/04 ,  C22C1/02 ,  C21D8/10 ,  C21D9/34

CPC classification number: C22C23/04 ,  C22C1/02 ,  C21D8/10 ,  C21D9/34

Abstract: Methods of making magnesium-based alloy components are provided. A preform of a magnesium-based alloy having a plurality of zirconium-rich domains distributed in a magnesium-alloy matrix is subjected to a temperature of ≥ about 360° C. and a deformation process that facilitates selective dynamic recrystallization to create a bimodal microstructure in the magnesium-based alloy component having a plurality of un-recrystallized regions distributed in a matrix comprising dynamically recrystallized grains. The magnesium-based alloy includes zinc (Zn) at ≥ about 2 to ≤ about 4 wt. % of the magnesium-based alloy, zirconium (Zr) at ≥ about 0.62 wt. % to ≤ about 1 wt. % of the magnesium-based alloy, total impurities at ≤ about 0.1 wt. % of the magnesium-based alloy, and a balance of magnesium (Mg). Hot-formed magnesium-based alloy components formed from such methods are also contemplated, including automotive components.

公开(公告)号：US20220251689A1

公开(公告)日：2022-08-11

申请号：US17577199

申请日：2022-01-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Henry ZHAN ,  Congjie WANG

IPC: C22C23/02

Abstract: A magnesium alloy matrix having an alloy composition including aluminum at a concentration of between 0.5 wt. % to 2.5 wt. %, manganese at a concentration of between 0.3 wt. % to 1.0 wt. %, the concentration of manganese is greater than or equal to a value of [Mn] determined by a linear function [Mn]=x[Al], where x is at least 0.6 when [Al]=0.5 and is at least 0.14 when [Al]=2.5, zinc at a concentration of between 0 wt. % to 3 wt. %, tin at a concentration of between 0 wt. % to 3 wt. %, calcium at a concentration of between 0 wt. % to 0.5%, rare earth metals at a concentration of between 0 wt. % to 5 wt. %, and a balance of the alloy composition being magnesium.

公开(公告)号：US20250144704A1

公开(公告)日：2025-05-08

申请号：US18527664

申请日：2023-12-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Henry ZHAN ,  Congjie WANG ,  Yiwu XU ,  Collin BABIJ

IPC: B22D21/00 ,  C22C23/02

Abstract: Magnesium alloys are disclosed for diecasting with reduced defects comprising aluminum in an amount greater than or equal to about 10 wt % and less than and equal to about 15 wt %; zinc in an amount greater than 0 and less than or equal to about 0.5 wt %; silicon in an amount greater than 0 and less than or equal to about 1.5 wt %; and the balance being magnesium and unavoidable impurities. Magnesium parts diecast from these magnesium alloys are also disclosed.

公开(公告)号：US20230095748A1

公开(公告)日：2023-03-30

申请号：US17738802

申请日：2022-05-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Henry ZHAN ,  Paul N. CREPEAU ,  Congjie WANG

IPC: C22C21/02 ,  C22F1/043 ,  B22D21/00

Abstract: The present disclosure provides a cast aluminum component prepared using an aluminum alloy composition. The aluminum alloy composition includes greater than or equal to about 3 wt. % to less than or equal to about 9 wt. % of silicon, greater than or equal to about 0.2 wt. % to less than or equal to about 0.6 wt. % of magnesium, greater than or equal to about 0.15 wt. % to less than or equal to about 0.8 wt. % of iron, greater than or equal to about 0.15 wt. % to less than or equal to about 0.6 wt. % of a combined concentration of chromium and manganese, greater than or equal to about 0.05 wt. % to less than or equal to about 0.2 wt. % of a combined concentration of vanadium and titanium, and a balance of aluminum. Greater than or equal to about 40 wt. % of the aluminum alloy composition is derived from post-consumer aluminum scrap.

公开(公告)号：US20220356540A1

公开(公告)日：2022-11-10

申请号：US17556183

申请日：2021-12-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qi LU ,  Jianfeng WANG ,  Congjie WANG ,  Qingquan LAI

IPC: C21D1/18 ,  C21D8/00

Abstract: A steel composition is provided. The steel composition includes 0.02-0.45 wt. % carbon (C), 0-8 wt. % manganese (Mn), 0-8 wt. % nickel (Ni), 11-17 wt. % chromium (Cr), 1-3 wt. % silicon (Si), and a balance of iron (Fe). The combined concentration of the Mn and Ni is 2-8 wt. %. The steel composition is configured to form a surface oxide layer including oxides of at least one of the Cr or the Si after being subjected to press hardening. Press-hardened steel (PHS) fabricated from the steel composition and a method of fabricating a (PHS) component from the steel composition are also provided.

公开(公告)号：US20220205068A1

公开(公告)日：2022-06-30

申请号：US17565634

申请日：2021-12-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Henry ZHAN ,  Congjie WANG

IPC: C22C23/02 ,  C22C1/03

Abstract: A master alloy including an alloy composition including magnesium (Mg) at a concentration of greater than or equal to about 1.00 wt. % to less than or equal to about 90 wt. %, boron (B) at a concentration of greater than or equal to about 0.01 wt. % to less than or equal to about 20 wt. %, and aluminum (Al) at a concentration of greater than or equal to about 0.1 wt. % to less than or equal to about 90 wt. %, wherein the alloy composition includes MgB2 particles at a volume fraction greater than or equal to about 0.01% to less than or equal to about 20%.