公开(公告)号：US20220314372A1

公开(公告)日：2022-10-06

申请号：US17217483

申请日：2021-03-30

Applicant: GM Global Technology Operations LLC

Inventor： Benjamin E. Slattery ,  Daniel T. Berry ,  Daniel L. Baker ,  Frank D. Risko

IPC: B23K26/40

Abstract: A method of making an enhanced cast iron workpiece having increased oil retention is provided. The method comprises providing a laser tool arranged to emit a laser to perform carbon burn-off from a cast iron workpiece. The cast iron workpiece comprises cast iron and having a first surface with carbon microstructures thereon. The method further comprises selectively laser burning-off carbon microstructures from the first surface of the workpiece to form a pattern on the first surface. The pattern has separate pockets by the laser burn-off of carbon microstructures on the first surface. Each separate pocket is separate from and free of fluid communication with any other pocket relative to the first surface to provide enhanced lubricant retention in each pocket on the first surface. The method further comprises heating the workpiece to between about 200° C. and about 400° C. to temper the first surface and cooling the workpiece to ambient temperature.

公开(公告)号：US20190323448A1

公开(公告)日：2019-10-24

申请号：US15956805

申请日：2018-04-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jianghuai Yang ,  Qigui Wang ,  Benjamin E. Slattery ,  Melani R. Wright ,  Huaxin Li ,  Dale A. Gerard ,  Daniel J. Wilson

IPC: F02F1/00 ,  B22D19/08 ,  B22D19/00 ,  B22D13/10

Abstract: A method of manufacturing a cylinder liner for an engine block for a vehicle propulsion system and the cylinder liner made from the method. The method includes providing a cylinder liner mold having a cylindrical inner surface, masking a first portion of the cylindrical inner surface, applying a coating to a second portion of the cylindrical inner surface, and forming a cylinder liner by solidifying molten metal in the cylinder liner mold.