Deakin University
Browse

File(s) under permanent embargo

Local patchworking of sheet properties combining carburization and hot stamping

conference contribution
posted on 2017-01-01, 00:00 authored by Bernard RolfeBernard Rolfe, Amir Abdollahpoor, Yanan WangYanan Wang, Michael PereiraMichael Pereira, Hui Kong, Daniel FabijanicDaniel Fabijanic, K Hu, R Han, K Gao, A Liu, L Pan, Y Bi, Z J Wang, Y S Zhang
Hot stamping is now commonplace in the automotive industry. The continuing need by automotive manufacturers to reduce weight while increasing crashworthiness has driven the industry to seek new hot stamping solutions. Currently tailored hot stamping is being introduced to hot stamp panels for automotive body structures. A tailored hot stamped part has at least two regions of different material properties to satisfy engineering design targets. For example, the B-pillar can be separated into the incredibly strong upper region to reduce intrusion, while the lower region is softer and tailored for energy absorption. We can then consider the tailored hot stamped part as a patchwork of hard and soft regions. Patchwork in this context means there is a relational organization (topology) to the network of hard and soft regions. The next generation of tailored hot stamping sheets may see extremely small regions of the blank have tailored properties.

We have investigated local carburization of a low-carbon blank sheet to locally tailor the properties of a hot stamped component. After hot stamping and in-die quenching, regions with a high carbon concentration (and high hardenability) transform to martensite while regions with low carbon concentration (and low hardenability) transform to ferrite, pearlite, or bainite. The location of carburizing can be controlled by using a commercially available stop-off coating (or mask) for carburizing. When this coating is used, the gradient in carbon concentration across the boundary between the masked and non-masked (that is, carburized and non-carburized) region of the sheet blank is on the order of the sheet thickness. The results of this process are reported in this paper.

History

Event

Chinese Mechanical Engineering Society. Conference (3rd : 2016 : Xian, China)

Series

Chinese Mechanical Engineering Society Conference

Pagination

346 - 351

Publisher

World Scientific Publishing

Location

Xian, China

Place of publication

Singapore

Start date

2016-08-25

End date

2016-08-27

ISBN-13

978-981-3207-29-5

Language

English

Publication classification

E1 Full written paper - refereed

Copyright notice

2017, World Scientific Publishing

Editor/Contributor(s)

Y Zhang, M Ma

Title of proceedings

ICHSU 2016 : Proceedings of the 3rd International Conference on Advanced High Strength Steel and Press Hardening

Usage metrics

    Research Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC