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http://dx.doi.org/10.3795/KSME-A.2012.36.10.1221

Mechanical Properties and Formability of TWB Boron Steel  

Nam, K.W. (Dept. of Materials Science and Engineering, Pukyong Nati'l Univ.)
Hwang, S.H. (UR Interdisciplinary Program of Mechanical Engineering, Pukyong Nati'l Univ.)
Kim, D.Y. (Korea Institute of Materials Science (KIMS))
Lee, M.Y. (SungWoo Hitech Co, LTD.)
Lee, S.M. (UR Interdisciplinary Program of Mechanical Engineering, Pukyong Nati'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.10, 2012 , pp. 1221-1226 More about this Journal
Abstract
The hot-stamping technique is a forming method used for manufacturing high-strength parts, in which a part is cooled rapidly after press forming above the austenite transformation temperature. Boron steel, which contains a very small amount of boron, is one of the materials used for hot stamping. The purpose of this study is to investigate the mechanical properties of boron steel according to the heat-treatment conditions and the formability by using an Erichsen cupping test. Die quenching from various temperatures was conducted for different elapsed heat-treatment times. Laser-welded boron steel after quenching at 1173 K-0 s has a tensile strength of 1203 MPa. This is 79% of the tensile strength of the base metal (1522 MPa). The formability of boron steel was not significantly different from that at the mold temperature. However, it decreased with increasing forming speed. These properties provide practical information for the use of boron steels for hot stamping.
Keywords
Boron Steel; Hot-Stamping; TWB; Die Quenching; Erichsen Cupping Test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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