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:
Apr. 11, 2017
Filed:
Mar. 12, 2013
Osaka University, Suita-shi, Osaka, JP;
Hidetoshi Fujii, Suita, JP;
Yoshiaki Morisada, Suita, JP;
OSAKA UNIVERSITY, Suita-shi, JP;
Abstract
A base material of a ferrous material is heated to an Apoint, which is a temperature to cause austenite appearance, or higher, and austenite appears in the base materialand(S). An amount of a strain assuming that an Mpoint, which is a temperature where the base material becomes martensite completely, is decreased to be less than room temperature is introduced into the base material (S). The all ferrous material becoming martensite on the occasion of cooling the ferrous material to room temperature is prevented. The base material is cooled to room temperature at a cooling rate where a line extrapolated a cooling curve of the base material intersects with a region where martensite is produced on the CCT diagram (S). Austenite remains in the manufactured ferrous material at room temperature.