公开(公告)号：US11752566B2

公开(公告)日：2023-09-12

申请号：US17581087

申请日：2022-01-21

Applicant: GM Global Technology Operations LLC

Inventor： Zhenke Teng ,  Andrew Clay Bobel ,  Jason M. Brown ,  Thomas R. Jones ,  Michael J. Karagoulis

IPC: C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  B23K11/11 ,  B32B15/01 ,  B23K11/16 ,  B23K101/00 ,  B23K101/18

CPC classification number: B23K11/115 ,  B23K11/166 ,  B32B15/013 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  B23K2101/006 ,  B23K2101/18

Abstract: A steel workpiece includes an alloy substrate comprising iron, about 1.4 to about 2.0 weight percent aluminum, and about 0 to about 1.0 weight percent silicon. The steel workpiece further includes a coating comprising zinc. A method of spot welding a workpiece stack-up that includes a pair of the steel workpieces includes providing the stack-up, contacting first and second electrodes to the steel workpieces, passing an electrical current through the stack-up, forming a weld nugget from molten mixing of the alloy substrates of the pair of steel workpieces, forming a boundary layer between the coating and the alloy substrate from dispersion of the coating into the alloy substrate and reaction of the zinc with the aluminum and the silicon to prevent molten mixing of the coating within the alloy substrate, and ceasing passage of the electrical current.

公开(公告)号：US20230234159A1

公开(公告)日：2023-07-27

申请号：US17581087

申请日：2022-01-21

Applicant: GM Global Technology Operations LLC

Inventor： Zhenke Teng ,  Andrew Clay Bobel ,  Jason M. Brown ,  Thomas R. Jones ,  Michael J. Karagoulis

IPC: B23K11/11 ,  B32B15/01 ,  C22C38/16 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  B23K11/16

CPC classification number: B23K11/115 ,  B32B15/013 ,  C22C38/16 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  B23K11/166 ,  B23K2101/18

Abstract: A steel workpiece includes an alloy substrate comprising iron, about 1.4 to about 2.0 weight percent aluminum, and about 0 to about 1.0 weight percent silicon. The steel workpiece further includes a coating comprising zinc. A method of spot welding a workpiece stack-up that includes a pair of the steel workpieces includes providing the stack-up, contacting first and second electrodes to the steel workpieces, passing an electrical current through the stack-up, forming a weld nugget from molten mixing of the alloy substrates of the pair of steel workpieces, forming a boundary layer between the coating and the alloy substrate from dispersion of the coating into the alloy substrate and reaction of the zinc with the aluminum and the silicon to prevent molten mixing of the coating within the alloy substrate, and ceasing passage of the electrical current.

公开(公告)号：US11441039B2

公开(公告)日：2022-09-13

申请号：US17127209

申请日：2020-12-18

Applicant: GM Global Technology Operations LLC

Inventor： Zhenke Teng ,  Jason M. Brown ,  Thomas R. Jones ,  Pei-chung Wang ,  Michael J. Karagoulis

IPC: C23C2/12 ,  C09D5/10 ,  C25D3/44 ,  B23K35/22 ,  C23C2/06 ,  C25D3/22 ,  C25D21/00 ,  C25D21/12

Abstract: A high temperature substrate coating to mitigate liquid metal embrittlement (LME) cracking in automobile vehicles includes a substrate. A coating is disposed on the substrate, the coating being one of a zinc-based material and an aluminum-based material, with the coating having a melting point of at least 500° C.