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:
Oct. 07, 2014
Filed:
Feb. 01, 2012
Bohuslav Ma{hacek Over (S)}ek, Kazn{hacek over (e)}jov, CZ;
Hana Jirková, Strakonice, CZ;
Pavel Hronek, {hacek over (C)}eské Velenice, CZ;
Ctibor {hacek Over (S)}tádler, Plze{hacek over (n)}, CZ;
Miroslav Urbánek, Mokrou{hacek over (s)}e, CZ;
Bohuslav Ma{hacek over (s)}ek, Kazn{hacek over (e)}jov, CZ;
Hana Jirková, Strakonice, CZ;
Pavel Hronek, {hacek over (C)}eské Velenice, CZ;
Ctibor {hacek over (S)}tádler, Plze{hacek over (n)}, CZ;
Miroslav Urbánek, Mokrou{hacek over (s)}e, CZ;
Abstract
A method of production of high-strength hollow bodies from multiphase martensitic steels includes a heating process, a forming process and a cooling process. A heating device heats hollow steel stock to the austenitic temperature of the material from which the stock is made. The stock is then converted by deformation in a forming device into a hollow body having the final shape. A cooling device thereafter cools the hollow body such that the material with the original austenite microstructure refined by deformation during the forming process cools to a temperature at which incomplete transformation of austenite to martensite occurs. The retained austenite stabilization is performed in an annealing device by diffusion-based carbon partitioning within the material from which the hollow body is made. The hollow body is cooled in a cooling device to ambient temperature after stabilization.