Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling

X. L. Li; C. S. Lei; Q. Tian; X. T. Deng; L. Chen; P. L. Gao; K. P. Du; Y. Du; Y. G. Yu; Z. D. Wang; R. D.K. Misra

doi:10.1016/j.msea.2017.05.066

Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling

X. L. Li, C. S. Lei, Q. Tian, X. T. Deng, L. Chen, P. L. Gao, K. P. Du, Y. Du, Y. G. Yu, Z. D. Wang, R. D.K. Misra

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

We describe here the microstructural evolution, mechanical properties and comprehensive strengthening mechanism of Ti-bearing high strength steels with different finish cooling temperatures in the context of newly developed ultrafast cooling system. Pilot-scale studies demonstrated that high yield strength of ~650 MPa can be obtained with ultrafast cooling finish temperature of 580 °C after hot rolling. The underlying reason is that the microalloyed carbides and nanoscale cementites can precipitate simultaneously to improve the precipitation strengthening to a large extent. In order to estimate the precipitation strengthening, the volume fraction of the precipitates in different size ranges was obtained by chemical phase analysis, small-angle X-ray and neutron scattering. The results indicated that Fe₃C, with a higher volume fraction, had a stronger precipitation strengthening effect than nanoscale TiC. The precipitation strengthening contribution of nanoscale precipitates can achieve 350 MPa. Together with solid solution strengthening and grain refinement strengthening, the theoretical calculated values match well with the experimental values.

Original language	English
Pages (from-to)	268-276
Number of pages	9
Journal	Materials Science and Engineering: A
Volume	698
DOIs	https://doi.org/10.1016/j.msea.2017.05.066
State	Published - 20 Jun 2017
Externally published	Yes

Keywords

High resolution transmission electron microscopy
High strength low alloy
Microstructural evolution
Nano-precipitates
Small-angle neutron and X-ray scattering
Thermomechanical controlled processing

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10.1016/j.msea.2017.05.066

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Li, X. L., Lei, C. S., Tian, Q., Deng, X. T., Chen, L., Gao, P. L., Du, K. P., Du, Y., Yu, Y. G., Wang, Z. D., & Misra, R. D. K. (2017). Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling. Materials Science and Engineering: A, 698, 268-276. https://doi.org/10.1016/j.msea.2017.05.066

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title = "Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling",

abstract = "We describe here the microstructural evolution, mechanical properties and comprehensive strengthening mechanism of Ti-bearing high strength steels with different finish cooling temperatures in the context of newly developed ultrafast cooling system. Pilot-scale studies demonstrated that high yield strength of ~650 MPa can be obtained with ultrafast cooling finish temperature of 580 °C after hot rolling. The underlying reason is that the microalloyed carbides and nanoscale cementites can precipitate simultaneously to improve the precipitation strengthening to a large extent. In order to estimate the precipitation strengthening, the volume fraction of the precipitates in different size ranges was obtained by chemical phase analysis, small-angle X-ray and neutron scattering. The results indicated that Fe3C, with a higher volume fraction, had a stronger precipitation strengthening effect than nanoscale TiC. The precipitation strengthening contribution of nanoscale precipitates can achieve 350 MPa. Together with solid solution strengthening and grain refinement strengthening, the theoretical calculated values match well with the experimental values.",

keywords = "High resolution transmission electron microscopy, High strength low alloy, Microstructural evolution, Nano-precipitates, Small-angle neutron and X-ray scattering, Thermomechanical controlled processing",

author = "Li, {X. L.} and Lei, {C. S.} and Q. Tian and Deng, {X. T.} and L. Chen and Gao, {P. L.} and Du, {K. P.} and Y. Du and Yu, {Y. G.} and Wang, {Z. D.} and Misra, {R. D.K.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = jun,

day = "20",

doi = "10.1016/j.msea.2017.05.066",

language = "英语",

volume = "698",

pages = "268--276",

journal = "Materials Science and Engineering: A",

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TY - JOUR

T1 - Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling

AU - Li, X. L.

AU - Lei, C. S.

AU - Tian, Q.

AU - Deng, X. T.

AU - Chen, L.

AU - Gao, P. L.

AU - Du, K. P.

AU - Du, Y.

AU - Yu, Y. G.

AU - Wang, Z. D.

AU - Misra, R. D.K.

PY - 2017/6/20

Y1 - 2017/6/20

N2 - We describe here the microstructural evolution, mechanical properties and comprehensive strengthening mechanism of Ti-bearing high strength steels with different finish cooling temperatures in the context of newly developed ultrafast cooling system. Pilot-scale studies demonstrated that high yield strength of ~650 MPa can be obtained with ultrafast cooling finish temperature of 580 °C after hot rolling. The underlying reason is that the microalloyed carbides and nanoscale cementites can precipitate simultaneously to improve the precipitation strengthening to a large extent. In order to estimate the precipitation strengthening, the volume fraction of the precipitates in different size ranges was obtained by chemical phase analysis, small-angle X-ray and neutron scattering. The results indicated that Fe3C, with a higher volume fraction, had a stronger precipitation strengthening effect than nanoscale TiC. The precipitation strengthening contribution of nanoscale precipitates can achieve 350 MPa. Together with solid solution strengthening and grain refinement strengthening, the theoretical calculated values match well with the experimental values.

AB - We describe here the microstructural evolution, mechanical properties and comprehensive strengthening mechanism of Ti-bearing high strength steels with different finish cooling temperatures in the context of newly developed ultrafast cooling system. Pilot-scale studies demonstrated that high yield strength of ~650 MPa can be obtained with ultrafast cooling finish temperature of 580 °C after hot rolling. The underlying reason is that the microalloyed carbides and nanoscale cementites can precipitate simultaneously to improve the precipitation strengthening to a large extent. In order to estimate the precipitation strengthening, the volume fraction of the precipitates in different size ranges was obtained by chemical phase analysis, small-angle X-ray and neutron scattering. The results indicated that Fe3C, with a higher volume fraction, had a stronger precipitation strengthening effect than nanoscale TiC. The precipitation strengthening contribution of nanoscale precipitates can achieve 350 MPa. Together with solid solution strengthening and grain refinement strengthening, the theoretical calculated values match well with the experimental values.

KW - High resolution transmission electron microscopy

KW - High strength low alloy

KW - Microstructural evolution

KW - Nano-precipitates

KW - Small-angle neutron and X-ray scattering

KW - Thermomechanical controlled processing

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U2 - 10.1016/j.msea.2017.05.066

DO - 10.1016/j.msea.2017.05.066

M3 - 文章

AN - SCOPUS:85019393026

SN - 0921-5093

VL - 698

SP - 268

EP - 276

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling

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