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. 17, 2013
Filed:
Dec. 02, 2011
Sukhyun Yoo, Dangjin-gun, KR;
Wonjae Cho, Dangjin-gun, KR;
Jutae Choi, Seoul, KR;
Kaeyoung Lee, Dangjin-gun, KR;
Kyoungho SO, Namwon-si, KR;
Sukhyun Yoo, Dangjin-gun, KR;
Wonjae Cho, Dangjin-gun, KR;
Jutae Choi, Seoul, KR;
Kaeyoung Lee, Dangjin-gun, KR;
Kyoungho So, Namwon-si, KR;
Hyundai Steel Company, , KR;
Abstract
A method for evaluating center segregation of a continuous cast slab is provided. The method of the present invention includes (A) creating a center segregation image of a slab using an etching solution comprising a picric acid (CHNO), a cupric chloride (CuCl), sodium laurylbenzenesulfonate (CHSONa) and the remainder of distilled water; and (B) evaluating the center segregation of a slab by scanning the image and applying the following Formula. The method creates an image of center segregation even for low-carbon steel having carbon (C) in an amount of 0.04 wt % or less as well as ultra low-sulfur steel having sulfur (S) in an amount of 50 ppm or less.