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:
May. 21, 2013
Filed:
Nov. 04, 2009
Woo-gon Kim, Daejeon, KR;
Chan-bock Lee, Daejeon, KR;
Jong-hyuk Baek, Daejeon, KR;
Do-hee Hahn, Seoul, KR;
Sung-ho Kim, Daejeon, KR;
Chang-hee Han, Daejeon, KR;
Tae-kyu Kim, Daejeon, KR;
Jun-hwan Kim, Daejeon, KR;
Woo-Gon Kim, Daejeon, KR;
Chan-Bock Lee, Daejeon, KR;
Jong-Hyuk Baek, Daejeon, KR;
Do-Hee Hahn, Seoul, KR;
Sung-Ho Kim, Daejeon, KR;
Chang-Hee Han, Daejeon, KR;
Tae-Kyu Kim, Daejeon, KR;
Jun-Hwan Kim, Daejeon, KR;
Korea Atomic Energy Research Institute, Daejeon, KR;
Abstract
Provided is a method of manufacturing a high strength ferritic/martensitic steel. The method includes melting a ferritic/martensitic steel, hot-working the melted ferritic/martensitic steel, normalizing the hot-worked ferritic/martensitic steel at a temperature of about 1050° C. to about 1200° C., tempering the ferritic/martensitic steel at a temperature of about 600° C. or less, and leaving MX precipitates while preventing a MCprecipitate from being precipitated, and cold-working and thermal-treating the ferritic/martensitic steel in a multistage fashion, and precipitating MCprecipitates. Through the above described configuration, the high strength ferritic/martensitic steel that prevents a ductility from being deteriorated even in a high-temperature environment may be manufactured.