公开(公告)号：US20180057915A1

公开(公告)日：2018-03-01

申请号：US15251259

申请日：2016-08-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Huaxin Li ,  Jianghuai Yang ,  Qigui Wang ,  William Miller

IPC: C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  F02F1/00

CPC classification number: C22C38/14 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  F02F1/004

Abstract: Steel alloys and steel alloy cylinder liners are provided. Steel alloys can comprise iron, about 0.8% to about 2.1% manganese, about 0.10% to about 0.40% silicon, about 0.05% to about 0.30% sulfur, about 0.06% to about 0.16% phosphorus, about 0.09% to about 0.21% titanium, about 0.09% to about 0.21% aluminum, and either low carbon and about 0.0005% to about 0.0055% boron, or medium carbon. The steel alloy cylinder liners can be capable of achieving a mirror-like finish. The steel alloy cylinder liners can comprise ultra-thin wall thickness of less than about 1.5 mm or about 1.0 mm to about 0.5 mm. The steel alloy cylinder liners can comprise a Young's modulus of at least 200 GPa. The steel alloy cylinder liners can comprise a Young's modulus to density ratio of at least about 25.64 GPa/(g/cm3).