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Dilatometric determination of four critical temperatures and phase transition fraction for austenite decomposition in hypo-eutectoid steels using peak separation method

Published online by Cambridge University Press:  08 February 2018

Tao Liu ,
Mujun Long ,
Helin Fan ,
Dengfu Chen ,
Huabiao Chen ,
Huamei Duan ,
Wenxiang Jiang  and
Wenjie He
Tao Liu
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
Mujun Long*
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
Helin Fan
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
Dengfu Chen*
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
Huabiao Chen*
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
Huamei Duan
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
Wenxiang Jiang
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
Wenjie He*
Affiliation:
Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People’s Republic of China
*
a)Address all correspondence to these authors. e-mail: longmujun@cqu.edu.cn
b)e-mail: chendfu@cqu.edu.cn
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Abstract

This work was aimed to use the peak separation method to directly measure the critical temperatures and phase transition fractions of austenite decomposition products based on experimental dilatometric curves in hypo-eutectoid steels. The results indicated that pearlite transformation start temperature and ferrite transformation finish temperature could be clearly obtained through peak separation processing, which were generally hidden in the overlapped peaks of the linear thermal expansion coefficient curve. Moreover, four critical temperatures of austenite decomposition were retarded to lower temperature with cooling rate increasing. The phase transition fraction for austenite decomposition was quantitated by measuring the area of the corresponding phase transformation peak. The final ferrite phase fraction after austenite decomposition decreased with cooling rate increasing. On the contrary, the final pearlite phase fraction increased with cooling rate increasing. Compared with the lever rule, the calculation result using peak area method can accurately reflect the actual phase fraction change versus the temperature during austenite decomposition.

Keywords

hypo-eutectoid steelsaustenite decompositioncritical temperaturesphase fraction
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 8 , 27 April 2018 , pp. 967 - 977
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Thomas, B.: Continuous Casting (Metallurgy). Yearbook of Science and Technology (McGraw-Hill, New York, New York, 2004), pp. 1–6.Google Scholar
Long, M., Dong, Z., Chen, D., Zhang, X., and Zhang, L.: Influence of cooling rate on austenite transformation and contraction of continuously cast steels. Ironmaking Steelmaking 42, 282–289 (2015).CrossRefGoogle Scholar
Kong, J. and Xie, C.: Effect of molybdenum on continuous cooling bainite transformation of low-carbon microalloyed steel. Mater. Des. 27, 1169–1173 (2006).CrossRefGoogle Scholar
Chen, J.: Influence of deformation temperature on γ–α phase transformation in Nb–Ti microalloyed steel during continuous cooling. ISIJ Int. 53, 1070–1075 (2013).CrossRefGoogle Scholar
Bhadeshia, H.K., and Honeycombe, R.: Steels: Microstructure and properties. (Butterworth-Heineman, Oxford, United Kingdom, 2008).Google Scholar
Pfeiler, C., Thomas, B.G., Wu, M., Ludwig, A., and Kharicha, A.: Solidification and particle entrapment during continuous casting of steel. Steel Res. Int. 79, 599–607 (2008).CrossRefGoogle Scholar
Long, M. and Chen, D.: Study on mitigating center macro-segregation during steel continuous casting process. Steel Res. Int. 82, 847–856 (2011).CrossRefGoogle Scholar
Kop, T.A., Sietsma, J., and Zwaag, S.V.D.: Dilatometric analysis of phase transformations in hypo-eutectoid steels. J. Mater. Sci. 36, 519–526 (2001).CrossRefGoogle Scholar
Andrés, C.G.A.D., Caballero, F.G., Capdevila, C., and Álvarez, L.F.: Application of dilatometric analysis to the study of solid–solid phase transformations in steels. Mater. Charact. 48, 101–111 (2002).CrossRefGoogle Scholar
Jian, Z., Dengfu, C., Chengqian, Z., Wengsing, H., and Mingrong, H.: The effects of heating/cooling rate on the phase transformations and thermal expansion coefficient of C–Mn as-cast steel at elevated temperatures. J. Mater. Res. 30, 2081–2089 (2015).CrossRefGoogle Scholar
Mintz, B.: Understanding the low temperature end of the hot ductility trough in steels. Mater. Sci. Technol. 24, 112–120 (2008).CrossRefGoogle Scholar
Carpenter, K.R., Dippenaar, R., and Killmore, C.: Hot ductility of Nb-and Ti-bearing microalloyed steels and the influence of thermal history. Metall. Mater. Trans. A 40, 573–580 (2009).CrossRefGoogle Scholar
Ma, F., Wen, G., Tang, P., Yu, X., Li, J., Xu, G., and Mei, F.: In situ observation and investigation of effect of cooling rate on slab surface microstructure evolution in microalloyed steel. Ironmaking Steelmaking 37, 211–218 (2010).CrossRefGoogle Scholar
Dou, K., Meng, L., Liu, Q., Liu, B., and Huang, Y.: Influence of cooling rate on secondary phase precipitation and proeutectoid phase transformation of micro-alloyed steel containing vanadium. Met. Mater. Int. 22, 349–356 (2016).CrossRefGoogle Scholar
Zhao, S., Wu, Y-j., He, M-f., and Zhang, L.: Effects of cooling rates on microstructures and mechanical properties of Nb–Ti microalloyed steel. J. Shanghai Jiaotong Univ. 17, 653–657 (2012).CrossRefGoogle Scholar
Pierson, H.O.: Handbook of Refractory Carbides and Nitrides: Properties, Characteristics, Processing, and Applications (William Andrew, Norwich, New York, 1996).Google Scholar
Zarandi, F. and Yue, S.: Failure mode analysis and a mechanism for hot-ductility improvement in the Nb-microalloyed steel. Metall. Mater. Trans. A 35, 3823–3832 (2004).CrossRefGoogle Scholar
Ma, F., Wen, G., Tang, P., Xu, G., Mei, F., and Wang, W.: Effect of cooling rate on the precipitation behavior of carbonitride in microalloyed steel slab. Metall. Mater. Trans. B 42, 81–86 (2011).CrossRefGoogle Scholar
Zarandi, F. and Yue, S.: Mechanism for loss of hot ductility due to deformation during solidification in continuous casting of steel. ISIJ Int. 44, 1705–1713 (2007).CrossRefGoogle Scholar
Jung, J.G., Park, J.S., Kim, J., and Lee, Y.K.: Carbide precipitation kinetics in austenite of a Nb–Ti–V microalloyed steel. Mater. Sci. Eng., A 528, 5529–5535 (2011).CrossRefGoogle Scholar
Chen, J., Lv, M.Y., Tang, S., Liu, Z.Y., and Wang, G.D.: Influence of cooling paths on microstructural characteristics and precipitation behaviors in a low carbon V–Ti microalloyed steel. Mater. Sci. Eng., A 594, 389–393 (2014).CrossRefGoogle Scholar
James, J.D., Spittle, J.A., Brown, S.G.R., and Evans, R.W.: A review of measurement techniques for the thermal expansion coefficient of metals and alloys at elevated temperatures. Meas. Sci. Technol. 12, R1–R15 (2001).CrossRefGoogle Scholar
Banks, K.M., Tuling, A., and Mintz, B.: Influence of thermal history on hot ductility of steel and its relationship to the problem of cracking in continuous casting. Mater. Sci. Technol. 28, 536–542 (2012).CrossRefGoogle Scholar
Li, Y., Chen, X., Liu, K., Wang, J., Wen, J., and Zhang, J.: Reasonable temperature schedules for cold or hot charging of continuously cast steel slabs. Metall. Mater. Trans. A 44, 5354–5364 (2013).CrossRefGoogle Scholar
Brimacombe, J.K. and Sorimachi, K.: Crack formation in the continuous casting of steel. Metall. Trans. B 8, 489–505 (1977).CrossRefGoogle Scholar
Santillana, B., Boom, R., Eskin, D., Mizukami, H., Hanao, M., and Kawamoto, M.: High-temperature mechanical behavior and fracture analysis of a low-carbon steel related to cracking. Metall. Mater. Trans. A 43, 5048–5057 (2012).CrossRefGoogle Scholar
Zhao, R-j., Fu, J-x., Zhu, Y-y., Yang, Y-j., and Wu, Y-x.: Dilatometric analysis of irreversible volume change during phase transformation in pure iron. J. Iron Steel Res. Int. 23, 828–833 (2016).CrossRefGoogle Scholar
Vázquez-Gómez, O., López-Martínez, E., Gallegos-Pérez, A.I., Santoyo-Avilés, H., Vergara-Hernández, H.J., and Campillo, B.: Kinetic Study of the Austenite Decomposition During Continuous Cooling in a Welding Steel. In Proceedings of the 3rd Pan American Materials Congress (Springer, Cham, Switzerland, 2017), pp. 749–760.CrossRefGoogle Scholar
Yang, H.B., Ma, B.G., Zhu, F.X., and Liu, X.H.: Analysis of continuous cooling transformation and microstructure of hot-formed GCr15 steel. J. Northeast. Univ. 29, 1115–1117 (2008).Google Scholar
Pawłowski, B.: Dilatometric examination of continuously heated austenite formation in hypoeutectoid steels. J. Achiev. Mater. Manuf. Eng. 54, 185–193 (2012).Google Scholar
Caballero, F.G., Capdevila, C., and Andrés, C.G.D.: Evaluation and review of simultaneous transformation model in high strength low alloy steels. Mater. Sci. Technol. 18, 534–540 (2002).CrossRefGoogle Scholar
Suh, D.W., Oh, C.S., Han, H.N., and Kim, S.J.: Dilatometric analysis of austenite decomposition considering the effect of non-isotropic volume change. Acta Mater. 55, 2659–2669 (2007).CrossRefGoogle Scholar
Dong, Z., Chen, D., Long, M., Li, W., Chen, H., and Vitos, L.: Computation of phase fractions in austenite transformation with the dilation curve for various cooling regimens in continuous casting. Metall. Trans. B 47, 1553–1564 (2016).CrossRefGoogle Scholar
Li, H., Gai, K., He, L., Zhang, C., Cui, H., and Li, M.: Non-isothermal phase-transformation kinetics model for evaluating the austenization of 55CrMo steel based on Johnson–Mehl–Avrami equation. Mater. Des. 92, 731–741 (2016).CrossRefGoogle Scholar
Long, M., Chen, D., Zhang, L., Zhao, Y., and Liu, Q.: A mathematical model for mitigating centerline macro segregation in continuous casting slab. Metal. Int. 16, 19–33 (2011).Google Scholar
Wu, D., Liu, G., Sun, R., and Fan, X.: Investigation of structural characteristics of thermally metamorphosed coal by FTIR spectroscopy and X-ray diffraction. Energy Fuels 27, 5823–5830 (2013).Google Scholar
Ibarra, J., Muñoz, E., and Moliner, R.: FTIR study of the evolution of coal structure during the coalification process. Org. Geochem. 24, 725–735 (1996).CrossRefGoogle Scholar
Petkov, P.: Austenite decomposition of low carbon high strength steels during continuous cooling. Master's thesis, Department of Metals and Materials Engineering, University of British Columbia, Vancouver, Canada (2004).Google Scholar