The Application of Direct Water Quenching Process in Hot Stamping of Boron Steels

Hyeon Tae Park; Eui Pyo Kwon; Ik-Tae Im

doi:10.3740/MRSK.2019.29.12.818

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2019 Vol.29, Issue 12 Preview Page

The Application of Direct Water Quenching Process in Hot Stamping of Boron Steels 보론강 판재 핫스탬핑시 직수분사냉각 공정의 적용성

December 2019. pp. 818-824

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Abstract

In this study, the direct water quenching technique is applied to validate the applicability of direct water quenching as a cooling method in the hot stamping process of 3.2 mm thick boron steel sheet. Cooling performance of conventional die quenching and direct water quenching is compared. Higher cooling rate is obtained by hot stamping with direct water quenching compared to die quenching. As the flow rate of cooling water increases, the cooling rate increases, and a high cooling rate of 71 °C/s is achieved under flow rate conditions of 0.8 L/min. Through direct water quenching, the cooling time required for sufficient cooling of the sheet is reduced. Full martensitic microstructure is obtained under flow rate condition of 0.8 L/min. Hardness increases with increasing flow rate. From these results, it is verified that the direct water quenching is applicable to the hot stamping of thick boron steel sheet.

Keywords

hot stamping

direct water quenching

boron steel

cooling rate

microstructure

References

H. Karbasian and A. E. Tekkaya, J. Mater. Process. Technol., 210, 2103 (2010).10.1016/j.jmatprotec.2010.07.019

M. Naderi, M. Ketabchi, M. abbasi and W. bleck, J. Mater. Sci. Technol., 27, 369 (2011).10.1016/S1005-0302(11)60076-5

M. Merklein, J. Lechler. J. Mater. Process. Technol., 177, 452 (2006).10.1016/j.jmatprotec.2006.03.233

J. Zhou, B. Wang, M. Huang and D. Cui. J. Mater. Int., 21, 544 (2014).10.1007/s12613-014-0940-7

M. Muro, G. Artola, A. Gorrino and C. Angulo, Metals, 8, 385 (2018).10.3390/met8060385

H. Fuckuchi and N. Nomura, Nippon Steel & Sumitomo Metal Technical Report, 112, (2016).

S. Kim and H. Kong, J. Welding and Joining, 33, 36 (2015).10.5781/JWJ.2015.33.6.36

T. Maeno, K. I. Mori and M. Fujimoto, CIRP Annals Manuf. Technol., 64, 281 (2015).10.1016/j.cirp.2015.04.128

K. Mori, P. F. Bariani, B.-A. Behrens, A. Brosius, S. Bruschi, T. Maeno, M. Merklein and J. Yanagimoto, CIRP Annals Manuf. Technol., 66, 755 (2017).10.1016/j.cirp.2017.05.007

10.

P. Namklang, V. Uthaisangsuk, J. Manuf. Processes, 21, 87 (2016).10.1016/j.jmapro.2015.11.008

11.

B. C. Hwang, Korean J. Mater. 25, 497 (2015).10.3740/MRSK.2015.25.9.497

12.

S. I. Lee, Y. Cho and B. C. Hwang, Korean J. Mater., 26, 325 (2016).10.3740/MRSK.2016.26.6.325

13.

R. Neugebauer, T. Altan, M. Geiger, M. Kleiner and A. Sterzing, CIRP. Annals., 55, 793 (2006).10.1016/j.cirp.2006.10.008

14.

B. F, B. González, G. Artola, N. López de Lacalle and C. Angulo, Metals, 9, 235 (2019).10.3390/met9020235

Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 29
No :12
Pages :818-824
Received Date : 2019-10-29
Revised Date : 2019-10-29
Accepted Date : 2019-12-01
DOI :https://doi.org/10.3740/MRSK.2019.29.12.818

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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