Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Qigui Wang0
Paul J. Gelazin0
James D. Cremonesi0
Daniel J. Wilson0
Jianghuai Yang0
Date of Patent
February 20, 2024
0Patent Application Number
171149610
Date Filed
December 8, 2020
0Patent Citations
Patent Primary Examiner
Patent abstract
A method for manufacturing a crankshaft for an internal combustion engine with a plurality of journals having a hardened case with a first microstructure. The crankshaft is comprised of a steel comprising between about 0.3 wt % and 0.77 wt % Carbon. The first microstructure of the hardened case of the journals comprises between about 15% and 30% ferrite and a balance of martensite and the resultant subsurface residual stress between 310 MPa and 620 MPa.
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