Effect of Ferrite Status on Mechanical Properties of Hot-Rolled Directly Quenched and Partitioned Steel

Xiao Dong Tan; Xiao Long Yang; Yun Bo Xu; Zhi Ping Hu; Fei Peng; Hong Zhang; Yong Mei Yu; Di Wu

doi:10.4028/www.scientific.net/MSF.816.736

Paper Titles

Phenomenon of Gaseous Adiabatic Compression of Powder in Explosive Compaction
p.711

Double Inhibitory Actions on WC Grains of Microwave Sintered WC-12wt%Co-VC Alloy
p.715

Phase Structures and Properties of Au-Pd-M (M=Zr, Mo, Y) System
p.722

Effect of Pre-Quenching Process on Microstructure and Mechanical Properties in a Nb-Microalloyed Low Carbon Q-P Steel
p.729

Effect of Ferrite Status on Mechanical Properties of Hot-Rolled Directly Quenched and Partitioned Steel
p.736

Effect of Rolling Process on Impact Toughness in High Strength Low Carbon Bainitic Steel
p.743

Microstructure and Mechanical Properties of a Cold-Rolled Medium Manganese Steel with Delta Ferrite
p.750

Microstructure and Mechanical Properties of X70 Pipeline Steel with High H₂S Resistance
p.755

Effect of Cooling Procedure on Tensile and Charpy Impact Properties of Cr-Mo Ultra-High Strength Steel
p.761

HomeMaterials Science ForumMaterials Science Forum Vol. 816Effect of Ferrite Status on Mechanical Properties...

Effect of Ferrite Status on Mechanical Properties of Hot-Rolled Directly Quenched and Partitioned Steel

Abstract:

Hot-rolling direct quenching and partitioning (HDQ&P) processes were applied to both low carbon high silicon vanadium micro-alloyed steel and low carbon low silicon steel with phosphorus addition. Proeutectoid ferrite with an area fraction of about 30% was introduced into some of the sheets. Microstructures were characterized using SEM, TEM and XRD. Mechanical properties were investigated by means of uniaxial tensile test. Austenite stabilization, retained austenite stability, tensile deformation and fracture were comprehensively analyzed by making the comparison between the two steels and between the sheets with and without ferrite considering the different precipitation statuses in ferrite. Experimental results showed that the high silicon vanadium micro-alloyed steel contained more retained austenite with higher stability compared with the low silicon phosphorus added steel. Filled with much more carbides with larger sizes, the martensite in the low silicon phosphorus added steel exhibited a much salient tempered feature. The high silicon vanadium added steel possessed higher strength and ductility than the low silicon phosphorus added steel. The introduction of ferrite can result in an extremely obvious post-necking elongation drop in the low silicon phosphorus added steel. The dispersed V-bearing precipitates and high silicon content in ferrite can increase the yield strength and simultaneously diminish the hardness difference between ferrite and martensite, which can improve their compatible deformation capability and then enhance the work hardening ability and finally raise both the UTS and elongation of the steel.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volume 816)

Pages:

736-742

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.816.736

Citation:

Cite this paper

Online since:

April 2015

Authors:

Xiao Dong Tan, Xiao Long Yang, Yun Bo Xu, Zhi Ping Hu, Fei Peng, Hong Zhang, Yong Mei Yu, Di Wu

Keywords:

Ferrite Status, HDQ&P Steel, Mechanical Property, Microstructure

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] H.Y. Li, X.W. Lu, W.J. Li, X.J. Jin, Microstructure and mechanical properties of an ultrahigh-strength 40SiMnNiCr steel during the one-step quenching and partitioning process, Mater. Trans. A 41A (2010) 1284-1300.

DOI: 10.1007/s11661-010-0184-8

Google Scholar

[2] X.D. Tan, Y.B. Xu, X.L. Yang, D. Wu, Microstructure-properties relationship in a one-step quenched and partitioned steel, Mater. Sci. Eng. A. 589 (2014) 101-111.

DOI: 10.1016/j.msea.2013.09.063

Google Scholar

[3] J. Speer, D.K. Matlock, B.C. De Cooman, J.G. Schroth, Carbon partitioning into austenite after martensite transformation, Acta Mater. 51 (2003) 2611-2622.

DOI: 10.1016/s1359-6454(03)00059-4

Google Scholar

[4] N. Zhong, X.D. Wang, L. Wang, Y.H. Rong, Enhancement of the mechanical properties of a Nb-microalloyed advanced high-strength steel treated by quenching-partitioning-tempering process, Mater. Sci. Eng. A. 506 (2009) 111-116.

DOI: 10.1016/j.msea.2008.11.014

Google Scholar

[5] M.J. Santofimia, L. Zhao, R. Petrov, C. Kwakernaak, W.G. Sloof, J. Sietsma, Microstructure development during the quenching and partitioning process in a newly designed low-carbon steel, Acta Mater. 59 (2011) 6059-6068.

DOI: 10.1016/j.actamat.2011.06.014

Google Scholar

[6] X. D Tan, Y.B. Xu, X.L. Yang, Z.Q. Liu, D. Wu, Effect of partitioning procedure on microstructure and mechanical properties of a hot-rolled directly quenched and partitioned steel, Mater. Sci. Eng. A. 594 (2014) 149-160.

DOI: 10.1016/j.msea.2013.11.064

Google Scholar

[7] M.C. Somani, D.A. Porter, L.P. Karjalainen, D.K. Misra, Evaluation of DQ&P processing route for the development of ultra-high strength tough ductile steels, J. Metall. Eng. 2 (2013) 154-160.

DOI: 10.4028/www.scientific.net/msf.783-786.1009

Google Scholar

[8] S. Zhou, K. Zhang, Y. Wang, J.F. Gu, Y.H. Rong, High strength-elongation product of Nb-microalloyed low-carbon steel by a novel quenching-partitioning-tempering process, Mater. Sci. Eng. A. 528 (2011) 8006-8012.

DOI: 10.1016/j.msea.2011.07.008

Google Scholar

[9] S. Zhou, K. Zhang, N. Chen, J. Gu, Y. Rong, Investigation on high strength hot-rolled plates by quenching-partitioning-tempering process suitable for engineering, ISIJ Int. 51 (2011) 1688-1695.

DOI: 10.2355/isijinternational.51.1688

Google Scholar

[10] B.C. De Cooman, Structure-properties relationship in TRIP steels containing carbide-free bainite, Curr. Opin. Solid State Mater. Sci. 8 (2004) 285-303.

DOI: 10.1016/j.cossms.2004.10.002

Google Scholar

[11] M.J. Santofimia, T. Nguyen-Minh, L. Zhao, R. Petrov, I. Sabirov, J. Sietsma, New low carbon Q&P steels containing film-like intercritical ferrite, Mater. Sci. Eng. A. 527 (2010) 6429-6439.

DOI: 10.1016/j.msea.2010.06.083

Google Scholar

[12] Y.B. Xu, X.D. Tan, X.L. Yang, Z.P. Hu, F. Peng, D. Wu, G.D. Wang, Microstructure evolution and mechanical properties of a hot-rolled directly quenched and partitioned steel containing proeutectoid ferrite, Mater. Sci. Eng. A. 607 (2014) 460-475.

DOI: 10.1016/j.msea.2014.04.030

Google Scholar