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:
Nov. 24, 1998
Filed:
Dec. 18, 1996
Kenneth W Burris, Peoria, IL (US);
Thomas E Clements, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A process for improving fatigue resistance of a case hardened component having a case thickness 't', subjected to one or more of rolling, sliding, abrasion, bending and pitting includes determining the magnitude of fatigue strength at surface and at a plurality of pre-selected points along thickness 't' of a component. The applied fatigue stresses acting upon the component at the surface and at the plurality of pre-selected points along thickness 't' are also determined. Then, a compressive residual stress profile is tailored from the surface to thickness 't' of the component. The compressive residual stresses at the surface and at the plurality of the pre-selected points along thickness 't' respectively have a magnitude sufficient to attain a net resultant stress which is at least 25% lower than the fatigue strength at the surface and the corresponding plurality of pre-selected points.