Abstract
This paper presents the results of the analytical study of the microstructural evolution of forged and rolled rings with a diameter greater than 2 meters, since the raw material, set-up forgings, ring rolling and heat treatments, including normalizing, quenching and tempering. Also, great care will be taken on the chemical micro-segregation. Four rings, were instrumented with 20 thermocouples each one in order to follow the thermal profile during heating and quenching. Cooling rates will be used to predict the microstructure developed under the different heat treatments and it will be compared at different positions inside the rings. It can be seen that the cooling curves obtained show no presence of soft phases, as shown in the microstructures in the figure shown below. With the results of microstructure obtained, which show martensitic structure to a greater extent, it meets the desirable mechanical properties, which are shown below.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
H. W. Walton. Understanding and controlling distortion in large bearing rings - some practical aspects. The Torrington Company, Rutherfordton, North Carolina. 2nd International Conference on Quenching and the Control of Distortion, Cleveland Ohio, p. 143–147. (1996).
E. Totten, Polymer Quenchants: The Basics, Adv. Mat. & Proc, 137, 51–53 (1990).
H.J. French. A study of the quenching of Steels. Trans. A.S.S.T., 646–727(1930).
M. Tagaya and I. Tamura, Mem. Inst. Sci. Ind. Res., Osaka University, 85–107 (1952).
M. Schwalm and H.M. Tensi, Heat Mass Transfer Metallic Systems, Proceedings of Int. Cent. Heat Mass Transfer, 563–572. (1981).
M.M. Wolf, Historical aspects and key technologies, The Making, Shaping and Treating of Steel (Ironmaking Volume, 11th. Edition), AISE Steel Foundation, (in press). 240–264 (1999).
W.T. Cook, Review of Selected Steel-related Factors Controlling Distortion in Heat treatable Steels, Heat Treatment of Metals, 26, 27–36 (1999).
G.E. Totten, C.E. Bates and N.A. Clinton, Cooling Curve Analysis — Chapter 2, in Handbook of Quenchants and Quenching Technology, ASM International, Materials Park, OH, p. 69–128. (1993)
G.M. Webster and G.E. Totten, “Cooling Curve Analysis - Data Acquisition”, in Heat Treating: Proceedings of the 16th Conference, Ed. J.L. Dossett and R.E. Luetje, ASM International, Materials Park, OH, p. 427–434 (1996)
G. Totten, E. Howes, and M. A.H, Steel Heat Treatment Handbook. Marcel Dekker, Inc. p. 157 (1997)
Z. Ke-Jian Reduction and Elimination of Quench Distortion by CRB Method, Beijing HuaLi Fine Chemical Company Ltd. Beijing 102200, China.
A. Pérez, C. Márquez, E. Martínez. Isothermal Transformation Diagrams for Steel 4140 considering Carbon Equivalent. Internal Report. UANL-FIME, México. (2011).
C. Márquez, E. Martínez, J. Rodríguez, F. Fernández and A. Pérez. Heat treatment evolution of high dimension rings of steel AISI 4140. IMRS 2011, Cancún, México, August 2011 (unpublished).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Martínez, E., Márquez, C., Rodríguez, J. et al. Microstructural Evolution of High Dimension Rings of Steel AISI 4140. MRS Online Proceedings Library 1372, 157–164 (2011). https://doi.org/10.1557/opl.2012.128
Published:
Issue Date:
DOI: https://doi.org/10.1557/opl.2012.128