The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2018
Filed:
Feb. 12, 2016
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Yucong Wang, West Bloomfield, MI (US);
Martin S. Kramer, Clarkston, MI (US);
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 9/00 (2006.01); C23C 4/02 (2006.01); F02F 1/00 (2006.01); C22F 1/04 (2006.01); C22F 1/00 (2006.01); C22F 3/00 (2006.01);
U.S. Cl.
CPC ...
C23C 4/02 (2013.01); C22F 1/002 (2013.01); C22F 1/04 (2013.01); C22F 3/00 (2013.01); F02F 1/00 (2013.01); F02F 2001/008 (2013.01); F02F 2200/06 (2013.01);
Abstract
A method of treating the surface of an aluminum-based engine block cylinder bore that has been mechanically roughened. In one form, this method includes using vibratory stress relief, elevated temperature stress relief or cryogenic stress relief so that residual stresses imparted to the surface by the roughening process are reduced. In this way, a protective coating that is also applied to the bore surface will exhibit better adhesion and lower incidence of stress-induced or fatigue-induced cracking.