Abstract
This paper describes a set of experiments with misch metal and rare earth silicide additions in 1010 and 1030 steel to determine whether grain refinement occurs. Target rare earth (RE) contents of 0.1 and 0.2% were employed. After melting, the desired RE addition was added during tapping and then poured into green sand molds. The resulting test plates were then sectioned for tensile and metallographic testing. Yield strength increased for several of the 1010 and 1030 samples. The increase in yield strength correlated with a reduction in grain size. A dramatic increase in percent elongation was also observed in the 1010 sample with the smallest grain size. Electron microscopy found complex RE oxides. These oxides appear to act as heterogeneous nuclei. When they were coated with another slag, the grain size and mechanical properties were similar to the baseline material in both the 1010 and 1030.
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Easton, M., St. John, D., “Grain Refinement of Aluminum Alloys: Part II. Confirmation of, and a Mechanism for, the Solute Paradigm,” Metallurgical and Materials Transactions A, vol. 30A, pp. 1625–1633A (1999).
Kearns, M. A., Cooper, P. S., “Effects of Solutes on Grain Refinement of Selected Wrought Aluminum Alloys,” Materials Science and Technology, vol. 13, no. 8, pp. 650–654 (1997).
Lee, Y. C., Dahle, A. K., St. John, D., “The Role of Solute in Grain Refinement of Magnesium,” Metallurgical and Materials Transactions A, vol. 31A, no. 11, pp. 2895–2906 (2000).
Gruzleski, J. E., Microstructure Development During Metalcasting, p. 48, American Foundry Society, Schaumburg, IL (2000).
Bramfitt, B., “The Effect of Carbide and Nitride Addtions on the Heterogeneous Nucleation Behavior of Liquid Iron,” Metallurgical Transactions, vol. 1, pp. 1987–1995 (1979).
Moore, J.J., “Rare Earth Desulphurisation of Sand Cast Steel,” The British Foundryman, vol. 75, no. 10, pp. 173–182 (1982).
Li, H., McLean, A., Rutter, J.W., and Sommerville, I.D., “Influence of Rare Earth Metals on the Nucleation and Solidification Behavior of Iron and 1045 Steel,” Metallurgical Transactions B, vol. 19B, pp. 383–395 (1988).
Van der Eijk, C., and Walmsley, J., “Grain Refinement of Fully Austenitic Stainless Steels Using a Fe-Cr-Si-Ce Master Alloy,” Proceedings of the 59th Electric Furnace Conference, pp. 51–60 (2001).
Suito, H., Ohta, H., and Morioka, S., “Refinement of Solidification Microstructure and Austenite Grain by Fine Inclusion Particles,” ISIJ International, vol. 46, no. 6, p. 840–846 (2006).
Guo, M., and Suito, H., “Influence of Dissolved Cerium and Primary Inclusion Particles of Ce2O3 and CeS on Solidification Behavior of Fe-0.2 mass%C-0.02 mass%P Alloy,” ISIJ International, vol. 39, no. 7, pp. 722–729 (1999).
Grong, O., Kolbeinsen, L., Eijk, C., and Tranell, G., “Microstructure Control of Steels through Dispersoid Metallurgy Using Novel Grain Refining Alloys,” ISIJ International, vol. 46, no. 6, pp. 824–831 (2006).
Lan, J., Junjie, H., Wenjiang, D., Qudong, W., and Yanping, Z., “Effect of Rare Earth Metals on the Microstructure and Impact Thoughness of a Cast 0.4C-1.2Mo-1.0V Steel,” ISIJ International, vol. 40, no. 12, pp. 1275–1282 (2000).
Campbell, J., Castings 2nd Ed., p 280, Elsevier Butterworth-Heinemann, Burlington, MA (2004).
Gruzleski, J. E., Closset, B. M., The Treatment of Liquid Aluminum-Silicon Alloys, p 140, American Foundry Society, Schaumburg, IL (1990).
Jorstad, J. L., Rasmussen, W. M., Aluminum Casting Technology, p. 29, American Foundry Society, Schaumburg, IL (2006).
Makarov, A. V., Savrai, R. A., Schastivtsev, V. M., Tabatchikova, T. I., Egorova, L. Y., “Mechanical Properties and Fracture upon Static Tension of High-Carbon Steel with Different Types of Pearlite Structure,” The Physics of Metals and Metallography, vol. 104, no. 5, pp. 522–534 (2007).
Taleff, E. M., Syn, C. K., Lesuer, D. R., Sherby, O. D., “Pearlite in Ultrahigh Carbon Steels: Heat Treatments and Mechanical Properties,” Metallurgical and Materials Transactions A, vol. 27A, no. 1, pp. 111–118 (1996).
Qingxian, Y., Xuejun, R., Bo, L. Mej, Y., “Discussion of RE Inclusions as Heterogeneous Nuclei of Primary Austenite in Hardfacing Metals of Medium-High Carbon Steels,” Journal of Rare Earths, vol. 17, no. 4, pp. 293–297 (1999).
Moore, J. J., Hebsur, M. G., Ravipati, D. P, Arnson, H., “In Mold Rare Earth Treatment of Cast Steel,” Transactions of the American Foundrymen’s Society, vol. 91, pp. 433–444 (1983).
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Tuttle, R. Effect of Rare Earth Additions on Grain Refinement of Plain Carbon Steels. Inter Metalcast 6, 51–65 (2012). https://doi.org/10.1007/BF03355527
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DOI: https://doi.org/10.1007/BF03355527