Experimental investigations of the in-die quenching efficiency and die surface temperature of hot stamping aluminium alloys
File(s)
Published version
Author(s)
Zheng, Kailun
Lee, Junyi
Xiao, Wenchao
Wang, Baoyu
Lin, Jianguo
Type
Journal Article
Abstract
The in-die quenching is a key stage in the hot stamping volume production chain which determines the post-formed strength of lightweight alloy components, tool life, and hot stamping productivity. In this paper, the performance of in-die quenching, reflected by the quenching efficiency (the time of work-piece held within stamping dies) and die surface temperature during the simulated hot stamping process of AA6082, was experimentally and analytically investigated. A range of in-die quenching experiments were performed for different initial work-piece and die temperatures, quenching pressures, work-piece thickness, and die clearances, under hot stamping conditions. In addition, a one-dimensional (1D) closed-form heat transfer model was used to calculate the die surface temperature evolution that is difficult to obtain during practical manufacture situations. The results have shown that the in-die quenching efficiency can be significantly increased by decreasing the initial work-piece and die temperatures. Die clearances are required to be designed precisely to obtain sufficiently high quenching rates and satisfying post-formed strength for hot-stamped panel components. This study systematically considered an extensive variety of influencing factors on the in-die quenching performance, which can provide practical guides for stamping tool designers and manufacture systems for hot-stamping volume production.
Date Issued
2018-04-01
Date Acceptance
2018-03-27
Citation
Metals, 2018, 8 (4)
ISSN
2075-4701
Publisher
MDPI AG
Journal / Book Title
Metals
Volume
8
Issue
4
Copyright Statement
© 2018 The Author(s). This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0 - http://creativecommons.org/licenses/by/4.0/).
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000434882800034&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
in-die quenching
hot stamping
heat transfer
aluminium alloy
INTERFACIAL HEAT-TRANSFER
TRANSFER COEFFICIENT
STEEL
WORKING
Publication Status
Published
Article Number
231
Date Publish Online
2018-04-02