Austenitic Grain Size Effect on the Phase Transformation of a 7.0% Cr Steel for Forging

Abstract:

In this paper the effect of normalizing and tempering (N&T) thermal treatment on mechanical properties of a novel 7.0% Cr steel for forged components is studied. The main innovation is in the increased hardenability following the higher Cr content with respect to the more common 5% Cr steel allowing to lower the content of other chemical elements aimed to achieve the target mechanical properties. Results show that in the case of 7.0% Cr steel, following the high intrinsic hardenability, the austenitic grain size effect on microstructure after cooling is really poor.

• Periodical: Materials Science Forum (Volume 1016)
• Pages: 77-81
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1016.77
• Online since: January 2021
• Authors: Roberto Coletti*, Andrea Di Schino, Sabrina Mengaroni, Stefano Neri
• Keywords: Forged Steels, Heat Treatment, Microstructure

References

[1] S. Morito, H. Yoshida, T Maki, X. Huang, Effect of block size on the strength of lath martensite in low carbon steels, Materials Science and Engineering A 438-440 (2006) 237-240.

DOI: 10.1016/j.msea.2005.12.048

[2] R.K. Ray, J.J. Jonas, R.E. Hook, Cold rolling and annealing texture in low carbon and extra low carbon steels, International Materials Reviews 39 (1994) 129-172.

DOI: 10.1179/imr.1994.39.4.129

[3] A. Laasraoui, J.J. Jonas, Prediction of steel flow stresses at high temperatures and strain rates, Metallurgical Transactions A 22 (1991) 1545-1558.

DOI: 10.1007/bf02667368

[4] R. Rufini, O. Di Pietro, A. Di Schino, Predictive simulation of plastic processing of welded steel pipes, Metals 8 (2018) 519.

DOI: 10.3390/met8070519

[5] G. Straffelini, Materials for tribology, Springer: Berlin, Germany, (2015) 159-199.

[6] C. Zitelli, P. Folgarait, A. Di Schino, Laser powder bed fusion of stainless steels: a review, Metals 8 (2019) 731.

DOI: 10.3390/met9070731

[7] M.N. Mmohammed, M.Z. Omar, S. Al Zubaidi, Microstructure and mechanical properties of tool steels, Metals 8 (2018) 316.

[8] A. Di Schino, L. Alleva, M. Guagnelli, Microstrcture evolution during quenching and tempering of martensite in e medium C steel, Materials Science Forum, 715-716 (2012) 860-865.

DOI: 10.4028/www.scientific.net/msf.715-716.860

[9] A. Di Schino, M. Longobardo, G.L. Turconi, L. Scoppio, Metallurgical design and development of C125 grade for mild sour service application, NACE-International Corrosion Conference Series (2006) 061251-0612514.

[10] G. Bregliozzi, S.I. Ahmed, A. Di Schino, J.M. Kenny H. Haefke, Friction and wear behavior of AISI 304 austenitic stainless steel: influence of atmospheric humidity, load range and grain size, Tribology Letters 17 (2004) 697-704.

DOI: 10.1007/s11249-004-8075-z

[11] A. Di Schino, J.M. Kenny, G. Abbruzzese, Analysis of the recrystallization and grain growth processes in AISI 316 stainless steel J. Mat. Sci. 37 (2002) 5291-5298.

DOI: 10.4028/www.scientific.net/msf.426-432.1011

[12] A. Di Schino, L. Valentini, J.M. Kenny, Y. Gerbig, I. Ahmed, H. Haefke. Wear resistance of an high nitrogen stainless steel coated with nitrogenated amorphous carbon films Surface and Coatings Technology, 161 (2002) 224-231.

DOI: 10.1016/s0257-8972(02)00557-1

[13] T. Kvackaj, R. Kociscko, R. Biduslky, J. Bidulska, P. Bella, M. Luptak, A. Lovacova, J. Bacso, The influence of thermo-plastic processes on materials recovery, Acta Polonica Physica A 126 (2014) 184-185.

DOI: 10.12693/aphyspola.126.184

[14] B. Mintz, S.. Yue, J. Jonas, Hot ductility of steels, International Materials Reviews 36 (1991) 187-220.

DOI: 10.1179/imr.1991.36.1.187

[15] A. Di Schino, J.M. Kenny, I. Salvatori, G. Abbruzzese, Modelling primary recystallization and grain growth in low nickeò austenitic stainless steels, Journal of Materials Science 36 (2001) 593-601.

DOI: 10.1023/a:1004856001632

[16] J. De Ardo, C.I. Garcia, M. Hua, Vanadium micro-alloyed high strength steels for forgings, Metall. Ital. 9 (2010) 5-12.

[17] M. Corradi, A. Di Schino, A. Borri, R. Rufini, A review of the use of stainless steels for masonry repair and reinforcement, Construction and Building Materials 181 (2018) 335-346.

DOI: 10.1016/j.conbuildmat.2018.06.034

[18] H.J. McQueen, N.D. Ryan, Constitutive analysis in hot working, Materials science and Engineering A 322 (2002) 43-53.

[19] A.J De Ardo, , International Materials Reviews 48 (2003) 371-375.

[20] A. Steinen, K. Vetter, Micro-alloyed steel bars and forgings Harterei Techn Mitt 29 (1974) 169-173.

[21] A. Di Schino, Analysis of heat treatment effect on microstructural features evolution in a micro-alloyed martensitic steel Acta Metallurgica Slovaca 22 (2016) 266-270.

DOI: 10.12776/ams.v22i4.815

[22] A. Mengaroni, F. Cianetti, M. Calderini, E. Evangelista. A Di Schino, H. Mc Queen, Tool steels: forging simulation and microstructure evolution of large scale ingot Acta Physica Polonica A 128 (2015) 629-632.

DOI: 10.12693/aphyspola.128.629

[23] A. Di Schino, P. E. Nunzio, G.L. Turconi, Microstructure evolution during tempering of a martensite in e medium carbon steel, Materials Science Forum 558-559 (2007) 1435-1441.

DOI: 10.4028/www.scientific.net/msf.558-559.1435

[24] A. Di Schino, P. E. Nunzio, Metallurgical aspects related to contact fatigue phenomena in steels for back-up rolls, Acta Metallurgica Slovaca 23 (2017) 62-71.

DOI: 10.12776/ams.v23i1.852

[25] M. Algarni, Mechanical properties and microstructure characterization of AISI D2 and O1 cold work tool steel, Metals 9 (2019) 1169.

DOI: 10.3390/met9111169

[26] T. Kvackaj, I. Mamuzic, Development of bake hardening effect by plastic deformation and annealing conditions, Metalurgija 45 (2006) 51-55.