公开(公告)号：US10826139B2

公开(公告)日：2020-11-03

申请号：US16013254

申请日：2018-06-20

Applicant: GM Global Technology Operations LLC

Inventor： Dave G. Rich ,  Saad Hasan ,  Jeffrey Wyka ,  Jianfeng Wang ,  Dewen Kong ,  Haijing Liu

IPC: H01M10/617 ,  H01M2/10 ,  H01M10/625 ,  H01M10/6562 ,  H01M10/6556 ,  H01M2/18 ,  H01M10/6563 ,  B60R16/033 ,  H01M10/6572

Abstract: A battery enclosure shaped and sized to accept and surround a battery includes an outer case defining an aperture and having a base forming a bottom of the battery enclosure, the case having a first wall connected to a second wall, the second wall connected to a third wall, and a fourth wall portion connected to the first and third walls, each of the first, second, third, and fourth walls extending orthogonally from the base. The battery enclosure including a separable outer lid shaped to fit around the aperture of the case. The outer case and the outer lid having a material having thermal conductivity of less than about 0.3 W/mK, the battery enclosure has an air inlet selectively providing airflow to the battery enclosure and an air outlet selectively providing airflow from the battery enclosure, the outer case has a first thickness, the outer lid portion has a second thickness.

公开(公告)号：US20200072305A1

公开(公告)日：2020-03-05

申请号：US16509015

申请日：2019-07-11

Applicant: GM Global Technology Operations LLC

Inventor： Henry Zhan ,  Jianfeng Wang ,  Michael L. Holly ,  Mark T. Riefe

IPC: F16D65/10 ,  B60T1/06 ,  F16D65/12

Abstract: A method for manufacturing a ferrous rotational member including the steps of turning a first portion of the friction surface at a sufficient feed rate to provide a first deformed layer on the first portion of the friction surface; fine turning a second portion of the friction surface at a sufficient feed rate to provide a second deformed layer on the second portion of the friction surface; burnishing the first and second portions of the friction surface to achieve a predetermined roughness; and nitrocarburizing the rotational member at a time and temperature sufficient for the diffusion of nitrogen atoms and carbon atoms through the deformed layer to form hardened casings having variable thickness. The ferrous rotational member may be that of a brake rotor having a hub surface and a friction surface, where the hub surface and friction surface have a variable thickness hardened casing.

公开(公告)号：US10385415B2

公开(公告)日：2019-08-20

申请号：US15141272

申请日：2016-04-28

Applicant: GM Global Technology Operations LLC

Inventor： Jianfeng Wang

IPC: C21D9/00 ,  C21D8/00 ,  C21D7/06 ,  C21D6/00 ,  B24C1/10 ,  C22C38/38 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/06 ,  C23C2/34 ,  B32B15/01 ,  C21D7/02 ,  C21D7/04 ,  C21D7/00

Abstract: Methods of strengthening surface regions of high-strength transformation induced plasticity (TRIP) steel are provided. The method may comprise shot peening at least one region of an exposed surface of a hot-formed press-hardened component comprising a high-strength steel. Prior to shot peening, the component has a microstructure comprising ≥ about 5% by volume retained austenite in a matrix of martensite. The shot peening is conducted at a temperature of ≤ about 150° C. and forms at least one hardened surface region comprising ≤ about 2% by volume austenite. The TRIP steel may be zinc-coated and having a surface coating comprising zinc and substantially free of liquid metal embrittlement (LME). Zinc-coated hot-formed press-hardened components, including automotive components, formed from such methods are also provided.

公开(公告)号：US10260121B2

公开(公告)日：2019-04-16

申请号：US15426518

申请日：2017-02-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qi Lu ,  Jianfeng Wang

IPC: C21D1/19 ,  C21D1/40 ,  C21D1/42 ,  C21D1/52 ,  C21D8/00 ,  C21D9/00 ,  C21D1/673 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38

Abstract: In a method for increasing steel impact toughness, the steel composition contains from about 5 wt % to about 10 wt % manganese and has a martensite finish temperature (Mf) below room temperature. The steel composition is exposed to hot forming to form a steel part. During hot forming, the steel composition is subjected to a heat treatment temperature above its fully austenite formed temperature, is transferred to a die, and while in the die, is simultaneously formed and quenched. In one example, quenching cools the steel composition to room temperature, and the steel part is removed from the die and reheated to a baking temperature ranging from about 120° C. to about 400° C. In another example, quenching is interrupted at an interruption temperature ranging from about 120° C. to about 400° C., and the steel composition is maintained at the interruption temperature for a predetermined time and then is cooled to room temperature.

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：US20180216205A1

公开(公告)日：2018-08-02

申请号：US15417921

申请日：2017-01-27

Applicant: GM Global Technology Operations LLC

Inventor： Jianfeng Wang ,  Qi Lu ,  Anil K. Sachdev

IPC: C21D9/00 ,  C23C2/06 ,  C23C2/40 ,  C23C2/28 ,  C22C38/04 ,  C21D8/00 ,  C21D1/18 ,  B21D22/02

CPC classification number: C21D9/0068 ,  B21D22/022 ,  B21D35/005 ,  B32B15/013 ,  C21D1/18 ,  C21D6/005 ,  C21D8/005 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/04 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

Abstract: Methods for press hardening steel alloys comprised of medium-Mn are provided. The press-hardened steel alloy may have an ultimate tensile strength (UTS) of at least 1,700 MPa and a tensile elongation of at least 8%. The press-hardened steel alloy may be formed in two forming steps above the martensitic finish temperature. The press-hardened steel may have a microstructure comprising martensite at greater than or equal to about 80% to less than or equal to about 98% and retained austenite at less than or equal to about 20% to greater than or equal to about 2%.

公开(公告)号：US09880731B1

公开(公告)日：2018-01-30

申请号：US15267964

申请日：2016-09-16

Applicant: GM Global Technology Operations LLC

Inventor： Peggy Wang ,  Jianfeng Wang ,  Jimmy Qi

IPC: G06F3/0488 ,  B60R16/037

CPC classification number: B60R16/037 ,  G06F1/163 ,  G06F1/1652 ,  G06F2203/04102

Abstract: A modular flexible-screen apparatus allowing a user to transport personal preferences or settings between participating vehicles of transportation. The user can carry the preference-holding screen apparatus to and from the same vehicle, and between other vehicles the user owns, and/or to shared, taxi, or rental vehicles.

公开(公告)号：US20170314089A1

公开(公告)日：2017-11-02

申请号：US15141272

申请日：2016-04-28

Applicant: GM Global Technology Operations LLC

Inventor： Jianfeng Wang

IPC: C21D9/00 ,  B24C1/10 ,  C22C38/38 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/06 ,  C21D8/00 ,  C21D7/06 ,  C21D6/00 ,  B32B15/01 ,  C23C2/34

CPC classification number: C21D9/0068 ,  B24C1/10 ,  B32B15/013 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D7/00 ,  C21D7/02 ,  C21D7/04 ,  C21D7/06 ,  C21D8/005 ,  C21D2211/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/38 ,  C23C2/06 ,  C23C2/34

Abstract: Methods of strengthening surface regions of high-strength transformation induced plasticity (TRIP) steel are provided. The method may comprise shot peening at least one region of an exposed surface of a hot-formed press-hardened component comprising a high-strength steel. Prior to shot peening, the component has a microstructure comprising ≧about 5% by volume retained austenite in a matrix of martensite. The shot peening is conducted at a temperature of

公开(公告)号：US11781197B2

公开(公告)日：2023-10-10

申请号：US17889807

申请日：2022-08-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qi Lu ,  Congjie Wang ,  Jianfeng Wang ,  Zhisong Chai ,  Wei Xu

IPC: C21D9/46 ,  C22C38/18 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C21D6/00 ,  B21D22/02

CPC classification number: C21D9/46 ,  B21D22/022 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0247 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C21D2211/001 ,  C21D2211/008

Abstract: A method of forming a component includes providing a work-piece blank from a formable material. The work-piece blank includes at least one section having a surface roughness greater than 1 μm configured to facilitate efficient radiation of thermal energy therefrom when the work-piece blank is heated. The method also includes austenitizing the work-piece blank via heating the work-piece blank at a predetermined temperature for a predetermined amount of time to achieve an austenite microstructure in the at least one section and forestall oxidation of the work-piece blank. The method additionally includes transferring the austenitized work-piece blank into a forming press. The method also includes forming the component via the forming press from the austenitized work-piece blank. The method additionally includes quenching the component formed from the austenitized work-piece blank and cooling the formed component.

公开(公告)号：US20230243012A1

公开(公告)日：2023-08-03

申请号：US17889807

申请日：2022-08-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qi Lu ,  Congjie Wang ,  Jianfeng Wang ,  Zhisong Chai ,  Wei Xu

IPC: C21D9/46 ,  C22C38/18 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C21D6/00 ,  B21D22/02

CPC classification number: C21D9/46 ,  B21D22/022 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0247 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C21D2211/001 ,  C21D2211/008

Abstract: A method of forming a component includes providing a work-piece blank from a formable material. The work-piece blank includes at least one section having a surface roughness greater than 1 µm configured to facilitate efficient radiation of thermal energy therefrom when the work-piece blank is heated. The method also includes austenitizing the work-piece blank via heating the work-piece blank at a predetermined temperature for a predetermined amount of time to achieve an austenite microstructure in the at least one section and forestall oxidation of the work-piece blank. The method additionally includes transferring the austenitized work-piece blank into a forming press. The method also includes forming the component via the forming press from the austenitized work-piece blank. The method additionally includes quenching the component formed from the austenitized work-piece blank and cooling the formed component.