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. 22, 2013
Filed:
Jul. 29, 2008
Paul E. Krajewski, Troy, MI (US);
Ravi Verma, Shelby Township, MI (US);
Jon T. Carter, Farmington, MI (US);
Joshua D. Lasceski, Harrison Township, MI (US);
Paul E. Krajewski, Troy, MI (US);
Ravi Verma, Shelby Township, MI (US);
Jon T. Carter, Farmington, MI (US);
Joshua D. Lasceski, Harrison Township, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
The formability of coiled and annealed (O-temper) magnesium alloy sheet material in high temperature forming operations is sometimes adversely affected by small amounts of cold work introduced into the fine grained material during handling of the coil and unwinding it to obtain blank workpieces for hot stamping, hot blow forming, or the like. When necessary, the formability of the sheet material with regions of hard worked microstructure may be improved by predetermining a recovery heat treatment using small portions of the material in formability tests. The recovery heat treatment, determined for the specific coiled stock, may then be applied to the material of the coil as it is used in making vehicle body panels or the like.