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. 18, 2005
Filed:
Oct. 18, 2000
Lothar Foerster, Stuttgart, DE;
Michael Michalski, Weil der Stadt, DE;
Andreas Becht, Ludwigsburg, DE;
Karl-otto Englert, Gundelsheim, DE;
Michael Czeringer, Korntal-Muenchingen, DE;
Lothar Foerster, Stuttgart, DE;
Michael Michalski, Weil der Stadt, DE;
Andreas Becht, Ludwigsburg, DE;
Karl-Otto Englert, Gundelsheim, DE;
Michael Czeringer, Korntal-Muenchingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method of austempering of steel parts is described. The steel parts are initially austenitized and subsequently quenched to a start temperature which is higher than the martensite start temperature. Then the steel parts are subjected to a first isothermal holding at the start temperature for a first time period. Subsequently the steel parts are held for a second isothermal time period at a finish temperature which is higher than the start temperature. The method described is particularly well suited for rapid austempering of steel parts, a pure bainitic structure being achievable, and the core hardness of the steel parts obtained being settable via the start temperature, the finish temperature, the duration of the first time period, and the duration of the second time period.