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:
Dec. 04, 1984
Filed:
Jul. 18, 1983
Peter D Sciaky, Oak Lawn, IL (US);
Sciaky Bros., Inc., Chicago, IL (US);
Abstract
This invention relates to a method and apparatus for surface hardening metals over selected areas on a workpiece by means of a concentrated beam of electrons. The electron beam is directed and focused to the surface of the workpiece and is caused to move continuously along a predetermined path over a localized area on the surface. The path is traversed a preset number of times while the instantaneous speed of the beam along the path is varied and the electron beam current is varied in order to bring the selected area of the workpiece above the transformation temperature and close to the melting temperature and maintain it at this temperature for a predetermined time. The beam current is then discontinued to allow the material to be quenched and surface hardened locally.