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:
Mar. 26, 2019
Filed:
Dec. 14, 2012
Hyundai Motor Company, Seoul, KR;
Seung-Hyun Hong, Gyeonggi-Do, KR;
Ji-Hong Yoo, Gyeonggi-do, KR;
Hyundai Motor Company, Seoul, KR;
Abstract
Disclosed is a high frequency heat treatment method of hot-stamping-treated ultra-high strength parts, which comprises: a first step of heating the parts until the temperature of a heat treatment zone thereof becomes the AC3 transformation point or higher; a second step of maintaining the temperature until phase transformation of the heat treatment zone to austenite is completed; and a third step of cooling the heat treatment zone to transform the structure thereof to ferrite-pearlite. The present method improves the energy absorbing efficiency by increasing the parts' elongation ratio by locally forming a softening structure which absorbs energy.