Distribución y crecimiento de inclusiones en la solidificación de barras de acero para rodamientos con cromo y alto contenido de carbono

Chao Gu; Yan-ping Bao; Lu Lin

doi:10.3989/revmetalm.089

Autores/as

Chao Gu State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing https://orcid.org/0000-0002-0668-4859
Yan-ping Bao State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing https://orcid.org/0000-0002-1881-0939
Lu Lin State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing https://orcid.org/0000-0002-3096-4164

DOI:

https://doi.org/10.3989/revmetalm.089

Palabras clave:

Barras, Contenido total de oxígeno, Distribución de inclusiones, Secuencia de formación

Resumen

La distribución de inclusiones en las secciones transversales y longitudinales de barras de acero para rodamientos al cromo con alto contenido de carbono se ha estudiado determinando el contenido total de nitrógeno y oxígeno y mediante SEM/EDS. El crecimiento de inclusiones durante la solidificación se estudió con la ayuda del modelo de solidificación. La zona con contenido total de oxígeno relativamente alto en la sección transversal de las barras, es entre el arco interior de 3/16 y el exterior 1/4; entre el borde izquierdo 5/16 y el derecho 5/16. La secuencia de formación de las inclusiones es MgO-Al₂O₃ > TiN > MnS. El MnS podría envolver a los óxidos de magnesio y aluminio (MgO-Al2O3) y reducir el daño causado al acero, pero generalmente no podría envolver al TiN. Aparte, el TiN podría envolver a los óxidos de magnesio y aluminio (MgO-Al2O3) antes que al MnS, debilitando de este modo la capacidad protectora del MnS. Además, en comparación con las inclusiones de MgO-Al2O3, las inclusiones de TiN son generalmente más grandes, por lo que es necesario controlar la formación de estas inclusiones. En la sección longitudinal, el tamaño máximo de las inclusiones de TiN y MnS son arco interno 1/3 y exterior 1/3; en la dirección del ancho, las regiones son borde 1/3. Estas regiones y las aquellas con altos contenido de oxígeno deben evitarse en el procesado de rodamientos.

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Citas

Cornelissen, M.C.M. (1986). Mathematical-model for solidification of multicomponent alloys. Ironmak. Steelmak. 13 (4), 204–212.

Fujii, K., Nagasaka, T., Hino, M. (2000). Activities of the constituents in spinel solid solution and free energies of formation of MgO, MgO·Al2O3. ISIJ Int. 40 (11), 1059–1066. https://doi.org/10.2355/isijinternational.40.1059

Goto, H., Miyazawa, K., Yamada, W., Tanaka, K. (1995). Effect of cooling rate on composition of oxides precipitated during solidification of steels. ISIJ Int. 35 (6), 708–714. https://doi.org/10.2355/isijinternational.35.708

Guo, J., Cheng, S.S., Cheng, Z.J. (2013). Mechanism of non-metallic inclusion formation and modification and their deformation during compact strip production (CSP) process for aluminum-killed steel. ISIJ Int. 53 (12), 2142–2151. https://doi.org/10.2355/isijinternational.53.2142

Hua, L. Deng, S., Han, X.H., Song Huang, S. (2013). Effect of material defects on crack initiation under rolling contact fatigue in a bearing ring. Tribol. Int. 66, 315–323. https://doi.org/10.1016/j.triboint.2013.06.008

Itoh, H., Hino, M., Ban-ya, S. (1997). Thermodynamics on the formation of spinel nonmetallic inclusion in liquid steel. Metall. Mater. Trans. B. 28 (5), 953–956. https://doi.org/10.1007/s11663-997-0023-5

Kubaschewski, O., Alcock, C.B., Spenscer, P.J. (1993). Thermochemical data. Materials Thermochemistry. 6th Edition, Pergamon Press, pp. 257–323.

Liu, Z.Z., Wei, J., Cai, K.K. (2002). A coupled mathematical model of microsegregation and inclusion precipitation during solidification of silicon steel. ISIJ Int. 42 (9), 958–963. https://doi.org/10.2355/isijinternational.42.958

Ma, W.J., Bao, Y.P., Wang, M., Zhao, L.H. (2014). Effect of Mg and Ca treatment on behavior and particle size of inclusions in bearing steels. ISIJ Int. 54 (3), 536–542. https://doi.org/10.2355/isijinternational.54.536

Mazzù, A., Solazzi, L., Lancini, M., Petrogall, C., Ghidini, A., Faccoli, M. (2015). An experimental procedure for surface damage assessment in railway wheel and rail steels. Wear 342–343, 22–32. https://doi.org/10.1016/j.wear.2015.08.006

Moghaddam, S.M., Sadeghi, F., Paulson, K., Weinzapfel, N., Correns, M., Bakolas, V., Dinkel, M. (2015). Effect of non-metallic inclusions on butterfly wing initiation, crack formation, and spall geometry in bearing steels. Int. J. Fatigue. 80, 203–215. https://doi.org/10.1016/j.ijfatigue.2015.05.010

Ohnaka, I. (1986). Mathematical analysis of solute redistribution during solidification with diffusion in solid phase. Trans. Iron Steel Inst. Jpn. 26 (12), 1045–1051. https://doi.org/10.2355/isijinternational1966.26.1045

Sigworth, G.K., Elliott, J.F. (1974). The thermodynamics of liquid dilute iron alloys. Met. Sci. 8 (1), 298–310. https://doi.org/10.1179/msc.1974.8.1.298

Takada, H., Bessho, I., Ito, T. (1976). Effect of sulfur content and solidification variables on morphology and distribution of sulfide in steel ingots. Tetsu-to-Hagane 62 (10), 1319–1328.

Wang, Y.N., Yang, J., Bao, Y.P. (2014). Characteristics of BN precipitation and growth during solidification of BN free-machining steel. Metall. Mater. Trans. B. 45 (6), 2269–2278. https://doi.org/10.1007/s11663-014-0146-4

Wang, M., Bao, Y.P., Yang, Q., Zhao, L.H., Lin, L. (2015). Cleanliness evolution of interstitial free (IF) steel billets in the thickness direction. Chinese J. Eng. 37 (3), 307–311.

Wolf, M., Clyne, T.W., Kurz, W. (1982). Microstructure and cooling conditions of steel solidified in the continuous casting mould. Arch Eisenhüttenwes 53 (3), 91–92. https://doi.org/10.1002/srin.198205138

Yang, W., Duan, H.J., Zhang, L.F., Ren, Y. (2013). Nucleation, growth, and aggregation of alumina inclusions in steel. JOM 65 (9), 1173–1180. https://doi.org/10.1007/s11837-013-0687-z

Yang, L., Cheng, G.G., Li, S.J., Min Zhao, M., Gui-ping Feng, G.P. (2015). Generation mechanism of TiN inclusion for GCr15SiMn during electroslag remelting process. ISIJ Int. 55 (9), 1901–1905. https://doi.org/10.2355/isijinternational.ISIJINT-2015-253

Yu, H.S., Li, J.G. (2015). Size distribution of inclusions in 12% Cr stainless steel with a wide range of solidification cooling rates. International Journal of Minerals. Int. J. Min. Met. Mater. 22 (11), 1157–1162. https://doi.org/10.1007/s12613-015-1180-1

Zhang, L.F. (2013). Nucleation, growth, transport, and entrapment of inclusions during steel casting. JOM 65 (9), 1138–1144. https://doi.org/10.1007/s11837-013-0688-y

Zhang, T.S., Min, Y., Liu, C.J., Jiang, M.F. (2015a). Effect of Mg addition on the evolution of inclusions in Al–Ca deoxidized melts. ISIJ Int. 55 (8), 1541–1548. https://doi.org/10.2355/isijinternational.ISIJINT-2014-691

Zhang, L.F., Ren, Y., Duan, H.J., Yang, W., Sun, L.Y. (2015b). Stability diagram of Mg-Al-O system inclusions in molten steel. Metall. Mater. Trans. B. 46 (4), 1809-1825. https://doi.org/10.1007/s11663-015-0361-7

Zhao, D.W., Li, H.B., Bao, C.L., Yang, J. (2015). Inclusion evolution during modification of alumina inclusions by calcium in liquid steel and deformation during hot rolling process. ISIJ Int. 55 (10), 2115–2124. https://doi.org/10.2355/isijinternational.ISIJINT-2015-064