公开(公告)号：US20190040487A1

公开(公告)日：2019-02-07

申请号：US15668751

申请日：2017-08-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Charles Enloe ,  Curt D. Horvath ,  David Yang ,  Qi Lu ,  Wu Tao

IPC: C21D9/46 ,  C21D8/02 ,  C21D3/04 ,  C23C2/06 ,  B32B15/01 ,  B23K11/11 ,  B23K11/16 ,  B23K26/22 ,  B23K26/322

CPC classification number: C21D9/46 ,  B23K11/11 ,  B23K11/115 ,  B23K11/166 ,  B23K26/22 ,  B23K26/322 ,  B23K2103/166 ,  B32B15/013 ,  C21D3/04 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0257 ,  C21D2211/005 ,  C23C2/02 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C8/18 ,  C23C28/02 ,  C23C28/025 ,  C23C30/00 ,  C23C30/005 ,  Y10T428/12458 ,  Y10T428/12799 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A multilayer steel includes a core formed of transformation-induced plasticity (TRIP) steel. A decarburized layer is exterior to the core on at least one side thereof. The decarburized layer has reduced carbon content relative to the core. A zinc-based layer is exterior to the decarburized layer. The decarburized layer may have a composition of at least 80 percent ferrite, such that LME is reduced or mitigated. In some configurations, the decarburized layer is between 10-50 microns thick. A method of creating a coated advanced high-strength steel component is also provided. An apparatus for forming a coated advanced high-strength steel is also provided. The core of the multilayer steel may have a carbon weight-percent of less than or equal to 0.4. The decarburized layer of the multilayer steel may have a carbon weight-percent of less than or equal to 50 percent of the carbon weight-percent of the core.

公开(公告)号：US11433646B2

公开(公告)日：2022-09-06

申请号：US16394060

申请日：2019-04-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Charles Enloe ,  Michael J. Karagoulis ,  Curt D. Horvath

IPC: B32B15/01 ,  C23C2/06 ,  C22C18/04 ,  B23K11/11 ,  B23K11/16 ,  C23C28/02 ,  C23C2/28 ,  C23C2/34 ,  C21D1/26 ,  C23C28/00 ,  C23C30/00 ,  B32B15/20 ,  B32B15/04 ,  C23C2/40 ,  B32B15/18 ,  C22C18/00 ,  B23K103/04

Abstract: A metallic component includes a core formed of steel. A zinc alloy layer is disposed on the core. The zinc alloy layer is formed of zinc and a very small amount of aluminum, such as 0.14 weight percent or less. A method of creating a component includes providing a steel core, providing a zinc bath consisting of essentially of 0.01 to 0.14 weight percent aluminum, and hot dipping the steel core into the zinc bath to form a zinc coating on the steel core resulting in a zinc-coated steel component. The aluminum may be provided in even lower contents, such as less than 0.08 weight percent, or even less than 0.05 weight percent. The zinc-coated steel component may then be spot welded to another component without first annealing the zinc-coated component. Rather, heat treating is performed locally at the weld joint by the welding procedure alone.

公开(公告)号：US20180237878A1

公开(公告)日：2018-08-23

申请号：US15436213

申请日：2017-02-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jianfeng Wang ,  Charles M. Enloe ,  Jatinder P. Singh ,  Curt D. Horvath

IPC: C21D9/00 ,  C22C38/12 ,  C22C38/04 ,  C22C38/00 ,  C21D8/02 ,  C22C38/02 ,  C22C21/02 ,  B21D22/02

CPC classification number: C21D9/0068 ,  B21D22/022 ,  B21D35/005 ,  B32B15/012 ,  C21D1/34 ,  C21D8/005 ,  C21D8/0278 ,  C21D9/46 ,  C22C21/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12

Abstract: Disclosed are hot forming systems and apparatuses for metalworking components from micro-alloyed press hardened steel (PHS), methods for operating such systems/apparatuses, processes for hot forming components from micro-alloyed PHS, and components formed from such processes. A method of hot forming components from steel is disclosed. The method includes transferring a workpiece formed from a PHS micro-alloyed with niobium (e.g., 0.02-0.1 wt % Nb) to a furnace, e.g., via material handling robot. The workpiece is then heated to a peak furnace temperature and during a furnace time (e.g., total ramp and soak time) selected from a pentagon having heating time and temperature coordinates of: A (about 2 minutes, about 940° C.), B (about 2 minutes, about 1100° C.), C (about 3.5 minutes, about 1100° C.), D (about 5 minutes, about 975° C.), and E (about 5 minutes, about 940° C.). The heated workpiece is then transferred to a hot forming apparatus.

公开(公告)号：US10329639B2

公开(公告)日：2019-06-25

申请号：US15668751

申请日：2017-08-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Charles Enloe ,  Curt D. Horvath ,  David Yang ,  Qi Lu ,  Wu Tao

IPC: C21D9/46 ,  C21D8/02 ,  C21D3/04 ,  C23C2/06 ,  B32B15/01 ,  B23K11/11 ,  B23K11/16 ,  B23K26/22 ,  B23K26/322 ,  C23C30/00 ,  C23C2/28 ,  C23C2/40 ,  C23C2/02 ,  C23C2/26 ,  B23K103/16

Abstract: A multilayer steel includes a core formed of transformation-induced plasticity (TRIP) steel. A decarburized layer is exterior to the core on at least one side thereof. The decarburized layer has reduced carbon content relative to the core. A zinc-based layer is exterior to the decarburized layer. The decarburized layer may have a composition of at least 80 percent ferrite, such that LME is reduced or mitigated. In some configurations, the decarburized layer is between 10-50 microns thick. A method of creating a coated advanced high-strength steel component is also provided. An apparatus for forming a coated advanced high-strength steel is also provided. The core of the multilayer steel may have a carbon weight-percent of less than or equal to 0.4. The decarburized layer of the multilayer steel may have a carbon weight-percent of less than or equal to 50 percent of the carbon weight-percent of the core.

公开(公告)号：US10240224B2

公开(公告)日：2019-03-26

申请号：US15235922

申请日：2016-08-12

Applicant: GM Global Technology Operations LLC

Inventor： Charles M. Enloe ,  Jianfeng Wang ,  Curt D. Horvath ,  Jatinder P. Singh

IPC: C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/26

Abstract: An alloy with tailored hardenability includes carbon, silicon, manganese, nickel, molybdenum, chromium, vanadium, and cobalt. A time and temperature transformation diagram of the alloy has a bainite nose and a ferrite nose that occur at approximately the same time at approximately 4 seconds at temperatures of about 750 K and 950 K, respectively.

公开(公告)号：US20200338856A1

公开(公告)日：2020-10-29

申请号：US16394060

申请日：2019-04-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Charles Enloe ,  Michael J. Karagoulis ,  Curt D. Horvath

IPC: B32B15/01 ,  C23C2/06 ,  C22C18/04 ,  B23K11/11

Abstract: A metallic component includes a core formed of steel. A zinc alloy layer is disposed on the core. The zinc alloy layer is formed of zinc and a very small amount of aluminum, such as 0.14 weight percent or less. A method of creating a component includes providing a steel core, providing a zinc bath consisting of essentially of 0.01 to 0.14 weight percent aluminum, and hot dipping the steel core into the zinc bath to form a zinc coating on the steel core resulting in a zinc-coated steel component. The aluminum may be provided in even lower contents, such as less than 0.08 weight percent, or even less than 0.05 weight percent. The zinc-coated steel component may then be spot welded to another component without first annealing the zinc-coated component. Rather, heat treating is performed locally at the weld joint by the welding procedure alone.

公开(公告)号：US20180044769A1

公开(公告)日：2018-02-15

申请号：US15235922

申请日：2016-08-12

Applicant: GM Global Technology Operations LLC

Inventor： Charles M. Enloe ,  Jianfeng Wang ,  Curt D. Horvath ,  Jatinder P. Singh

IPC: C22C38/26 ,  C22C38/04 ,  C22C38/02 ,  C22C38/22

CPC classification number: C22C38/26 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22

Abstract: An alloy with tailored hardenability includes carbon, silicon, manganese, nickel, molybdenum, chromium, vanadium, and cobalt. A time and temperature transformation diagram of the alloy has a bainite nose and a ferrite nose that occur at approximately the same time at approximately 4 seconds at temperatures of about 750 K and 950 K, respectively.