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:
Sep. 04, 2012
Filed:
May. 27, 2009
Hee Joong Im, Gyeonggi-Do, KR;
Seung Man Nam, Seoul, KR;
Man Been Moon, Gyeonggi-Do, KR;
Sang Muk NA, Jeollanam-Do, KR;
Sung Namkoong, Seoul, KR;
Hee Joong Im, Gyeonggi-Do, KR;
Seung Man Nam, Seoul, KR;
Man Been Moon, Gyeonggi-Do, KR;
Sang Muk Na, Jeollanam-Do, KR;
Sung Namkoong, Seoul, KR;
Hyundai Hysco, , KR;
Abstract
The present invention relates to a method of manufacturing ultra-high strength steel products and, more particularly, to a method of manufacturing ultra-high strength steel products suitable for production of articles having a complicated shape or a high processing depth. The method includes preparing a steel sheet by blanking the steel sheet having hardenability to form a rough shape of a final product, cold-pressing the steel sheet to form a 50˜80% shape of the final product, precisely trimming the cold-formed steel sheet along a contour line corresponding to an outer contour of the final product, and hot-pressing the trimmed product to form the remaining 20˜50% shape of the final product and quenching simultaneous with hot-pressing, after heating the trimmed product to an austenite region of 700° C. or more.