A local heating method by near-infrared rays for forming of non-quenchable advanced high-strength steels

A forming process by local heating using near-infrared rays (NIRs) is proposed to reduce springback of non-quenchable advanced high-strength steels, such as dual-phase steels, that are not suitable materials for hot stamping. NIR lamps show outstanding cost performance, and the width of the heating...

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Bibliographic Details
Published inJournal of materials processing technology Vol. 214; no. 4; pp. 784 - 793
Main Authors Lee, Eun-Ho, Hwang, June-Sun, Lee, Chang-Whan, Yang, Dong-Yol, Yang, Woo-Ho
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2014
Subjects
Bending
Duplex stainless steels
Elliptical reflector
Forming
Furnaces
Hardness
Heating
High strength steels
Near-infrared rays
Non-quenchable advanced high-strength steels
Parabolic reflector
Reflectors
Sheet metal forming
Springback
Near-infrared rays
Parabolic reflector
Elliptical reflector
Sheet metal forming
Non-quenchable advanced high-strength steels
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Summary:A forming process by local heating using near-infrared rays (NIRs) is proposed to reduce springback of non-quenchable advanced high-strength steels, such as dual-phase steels, that are not suitable materials for hot stamping. NIR lamps show outstanding cost performance, and the width of the heating area can be controlled by designed reflectors. To confirm the advantages of NIR local heating, DP980 sheets were heated by two methods – NIR local heating and furnace heating, which heats the whole material. V-bending and 2D-draw bending were conducted with heated DP980 sheets. Results showed that NIR local heating has advantages over furnace heating in both shape accuracy and hardness.
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ISSN:0924-0136
DOI:10.1016/j.jmatprotec.2013.11.023