Phase Transformations and Microstructure of the Alloyed Steels for Mining Application

Article Preview

Abstract:

The dilatometer study of the austenite transformations in steels with different chemical composition was conducted. The studied steels were classified as the air hardened steels of different alloying systems (Cr-Ni-Mo, Cr-Mn-Si-Mo and Cr-Mo-V) designed for the mining applications (rock drilling equipment, drilling instrument). The microstructure of the steels was investigated after continuous cooling at the rates of 0.1...30 °C/s from the austenitization temperature down to the ambient temperature. The CCT diagrams of the studied steels were plotted showing that the alloying with different set of elements can provide the desired hardenability and microstructure.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

215-220

Citation:

Online since:

August 2021

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2021 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] M.V. Maisuradze, Yu.V. Yudin, A.A. Kuklina, Increase in impact strength during bainite structure formation In HY-TUF high-strength steel, Metallurgist. 63 (2019) 849-858.

DOI: 10.1007/s11015-019-00899-4

Google Scholar

[2] M.V. Maisuradze, M.A. Ryzhkov, E.V. Antakov, N.A. Popov, P.A. Proskuryakov, Special features of transformations of supercooled austenite in modern structural steels, Met. Sci. Heat Treat. 62 (2020) 448-456.

DOI: 10.1007/s11041-020-00583-4

Google Scholar

[3] H.-G. Fu, J. C. Kuang, G.-Q. Bai, L.-T. Wang, Study of medium carbon air hardened bainitic cast steel, Mater. Tech. 24 (2009) 247-252.

DOI: 10.1179/175355509x387147

Google Scholar

[4] M.V. Maisuradze, Yu.V. Yudin, D.I. Lebedev, Thermal strengthening of large parts made from high-strength sparingly doped steel in air, Steel Transl. 50 (2020) 61-66.

DOI: 10.3103/s0967091220050083

Google Scholar

[5] Yu.N. Simonov, O.D. Panov, M.Yu. Simonov, V.P. Vylezhnev, A.S. Ivanov, Principles of design of the chemical composition of steels for forming a structure of lower carbide-free bainite under delayed cooling, Met. Sci. Heat Treat. 57 (2015) 386-394.

DOI: 10.1007/s11041-015-9894-2

Google Scholar

[6] G.E. Totten, Steel Heat Treatment: Metallurgy and Technologies, CRC Press, Boca Raton, (2006).

Google Scholar

[7] M. Yamada, L. Yan, R. Takaku, Effects of alloying elements on the hardenability, toughness and the resistance of stress corrosion cracking in 1 to 3 mass. % Cr low alloy steel, ISIJ Int. 54 (2014) 240-247.

DOI: 10.2355/isijinternational.54.240

Google Scholar

[8] A.K. Bhargava, M.K. Banerjee, Hardenability of steel, Compr. Mater. Finish. 2 (2017) 50-70.

Google Scholar

[9] Y. Mae, Correlation of the effects of alloying elements on the hardenability of steels to the diffusion coefficients of elements in Fe, Int. J. Mater. Sci. App. 6 (2017) 200-206.

DOI: 10.11648/j.ijmsa.20170604.16

Google Scholar

[10] F. Han, B. Hwang, D.-W. Suh, Effect of molybdenum and chromium on hardenability of low-carbon boron-added steels, Met. Mater. Int. 14 (2008) 667-672.

DOI: 10.3365/met.mat.2008.12.667

Google Scholar

[11] M. Calcagnotto, D. Ponge, D. Raabe, On the effect of manganese on grain size stability and hardenability in ultrafine-grained ferrite/martensite dual-phase steels, Metal. Mater. Trans. A. 43 (2012) 37-46.

DOI: 10.1007/s11661-011-0828-3

Google Scholar

[12] M.V. Maisuradze, M.A. Ryzhkov, Yu.V. Yudin, Transformations of supercooled austenite in a promising high-strength steel grade under continuous cooling conditions, Met. Sci. Heat Treat. 59 (2017) 486-490.

DOI: 10.1007/s11041-017-0176-z

Google Scholar

[13] M.A. Ryzhkov, A.A. Popov, Methodological aspects of plotting of thermokinetic diagrams of transformation of supercooled austenite in low-alloy steels, Met. Sci. Heat Treat. 52 (2011) 612-616.

DOI: 10.1007/s11041-011-9329-7

Google Scholar

[14] ASTM E140-12B Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness, ASTM International, West Conshohocken, (2019).

DOI: 10.1520/e0140-12br19e01

Google Scholar

[15] Z. Zhao, C. Liu, Y. Liu, D.O. Northwood, A new empirical formula for the bainite upper temperature limit of steel, J. Mater. Sci. 36 (2001) 5045-5056.

Google Scholar

[16] M. Atkins, Atlas of Continuous Cooling Transformation Diagrams for Engineering Steels, British Steel Corporation, (1980).

Google Scholar

[17] S. R. Elmi Hosseini, A. Zabett, Z. Li, Cooling curve analysis of heat treating oils and correlation with hardness and microstructure of a low carbon steel, Mater. Perform. Char. 3 (2014) 427-445.

DOI: 10.1520/mpc20130067

Google Scholar

[18] C.E. Bates, G.E. Totten, N.A. Clinton, Handbook of Quenchants and Quenching Technology, ASM International, Materials Park, Ohio, (1993).

Google Scholar