Effect of phosphorus content on interfacial heat transfer and film deposition behavior during the high-temperature simulation of strip casting

Abstract

The interfacial wettability and heat transfer behavior are crucial in the strip casting of high phosphorus-containing steel. A high-temperature simulation of strip casting was conducted using the droplet solidification technique with the aims to reveal the effects of phosphorus content on interfacial wettability, deposited film, and interfacial heat transfer behavior. Results showed that when the phosphorus content increased from 0.014wt% to 0.406wt%, the mushy zone enlarged, the complete solidification temperature delayed from 1518.3 to 1459.4°C, the final contact angle decreased from 118.4° to 102.8°, indicating improved interfacial contact, and the maximum heat flux increased from 6.9 to 9.2 MW/m². Increasing the phosphorus content from 0.081wt% to 0.406wt% also accelerated the film deposition rate from 1.57 to 1.73 µm per test, resulting in a thickened naturally deposited film with increased thermal resistance that advanced the transition point of heat transfer from the fifth experiment to the third experiment.

Keywords

strip casting / interfacial heat transfer / interfacial wettability / naturally deposited film / phosphorus content

References

[1] Rodrigues CAD, Bandeira RM, Duarte BB, Tremiliosi-Filho G, Jorge AM Jr. Effect of phosphorus content on the mechanical, microstructure and corrosion properties of supermartensitic stainless steel. Mater. Sci. Eng. A, 2016, 650, 75.

[2] Choudhary SK, Ganguly S, Sengupta A, Sharma V. Solidification morphology and segregation in continuously cast steel slab. J. Mater. Process. Technol., 2017, 243, 312.

[3] Nolli P. Initial Solidification Phenomena: Factors Affecting Heat Transfer in Strip Casting, 2007, Pittsburgh, Carnegie Mellon University.

[4] Zhu CY, Zeng J, Wang WL. Twin-roll strip casting of advanced metallic materials. Sci. China Technol. Sci., 2022, 65(3): 493.

[5] Campbell P, Blejde W, Mahapatra R, Wechsler R. Recent progress on commercialization of castrip® direct strip casting technology at Nucor Crawfordsville. Metallurgist, 2004, 48(9): 507.

[6] Spitzer KH, Rüppel F, Viščorová R, Scholz R, Kroos J, Flaxa V. Direct strip casting (DSC)–An option for the production of new steel grades. Steel Res. Int., 2003, 74(11–12): 724.

[7] Ge S, Isac M, Guthrie RIL. Progress of strip casting technology for steel; historical developments. ISIJ Int., 2012, 52(12): 2109.

[8] Ge S, Isac M, Guthrie RIL. Progress in strip casting technologies for steel; Technical developments. ISIJ Int., 2013, 53(5): 729.

[9] Shibuya K, Ozawa M. Strip casting techniques for steel. ISIJ Int., 1991, 31(7): 661.

[10] Hwang JD, Lin HJ, Jang JSC, Hwang WS, Hu CT. Relationship between flow characteristics and surface quality in inclined twin roll strip casting. ISIJ Int., 1996, 36(6): 690.

[11] Yasunaka H, Taniguchi K, Kokita M, Inoue T. Surface quality of stainless steel type 304 cast by twin-roll type strip caster. ISIJ Int., 1995, 35(6): 784.

[12] Choo DK, Moon HK, Kang T, Lee S. Analysis and prevention of cracking during strip casting of AISI 304 stainless steel. Metall. Mater. Trans. A, 2001, 32(9): 2249.

[13] Wang Y, Xu YB, Zhang YX, et al. Development of microstructure and texture in strip casting grain oriented silicon steel. J. Magn. Magn. Mater., 2015, 379, 161.

[14] Xiong ZP, Kostryzhev AG, Stanford NE, Pereloma EV. Effect of deformation on microstructure and mechanical properties of dual phase steel produced via strip casting simulation. Mater. Sci. Eng. A, 2016, 651, 291.

[15] Muojekwu CA, Samarasekera IV, Brimacombe JK. Heat transfer and microstructure during the early stages of metal solidification. Metall. Mater. Trans. B, 1995, 26(2): 361.

[16] Xu H, Wang WL, Lu C, Lv PS, Zhu CY. Evolution of solidification structure for Si–Mn bearing AHSS under typical cooling rates. J. Mater. Res. Technol., 2021, 15, 524.

[17] C.Y. Zhu, J. Zeng, W.L. Wang, S. Chang, and C. Lu, Mechanism of δ → δ + γ phase transformation and hardening behavior of duplex stainless steel via subrapid solidification process, Mater. Charact., 170(2020), art. No. 110679.

[18] Phinichka N. The Effect of Surface Tension, Superheat and Surface Films on the Rate of Heat Transfer from an Iron Droplet to a Water Cooled Copper Mold, 2001, Pittsburgh, Carnegie Mellon University.

[19] Strezov L, Herbertson J, Belton GR. Mechanisms of initial melt/substrate heat transfer pertinent to strip casting. Metall. Mater. Trans. B, 2000, 31(5): 1023.

[20] Strezov L, Herbertson J. Experimental studies of interfacial heat transfer and initial solidification pertinent to strip casting. ISIJ Int., 1998, 38(9): 959.

[21] H. Todoroki, R. Lertarom, A.W. Cramb, I. Jimbo, and T. Suzuki, Evaluation of the initiation of solidification of iron against a water cooled copper mold, [in] the 54th Electric Furnace Conference Proceedings, Dallas, 1996, p. 585.

[22] H. Todoroki, R. Lertarom, T. Suzuki, and A.W. Cramb, Solidiflcation of steel droplets against a water cooled copper mold, [in] the Proceedings of the Alex McLean Symposium, Toronto, 1998, p. 155.

[23] Wang WL, Zhu CY, Lu C, Yu J, Zhou LJ. Study of the heat transfer behavior and naturally deposited films in strip casting by using droplet solidification technique. Metall. Mater. Trans. A, 2018, 49(11): 5524.

[24] Lu C, Wang WL, Zeng J, Zhu CY, Chang J. Effect of naturally deposited film on the sub-rapid solidification of medium manganese steel by using droplet solidification technique. Metall. Mater. Trans. B, 2019, 50(1): 77.

[25] Wang WL, Xue LW, Zhang TS, Zhou LJ, Chen JY, Pan ZH. Thermodynamic corrosion behavior of Al₂O₃, ZrO₂ and MgO refractories in contact with high basicity refining slag. Ceram. Int., 2019, 45(16): 20664.

[26] Zhang HH, Wang WL, Zhou D, Ma FJ, Lu BX, Zhou LJ. A study for initial solidification of Sn–Pb alloy during continuous casting: Part I. the development of the technique. Metall. Mater. Trans. B, 2014, 45(3): 1038.

[27] Zhou D, Wang WL, Zhang HH, Ma FJ, Chen K, Zhou LJ. A study for initial solidification of Sn–Pb alloy during continuous casting: Part II. effects of casting parameters on initial solidification and shell surface. Metall. Mater. Trans. B, 2014, 45(3): 1048.

[28] Zhang HH, Wang WL. Mold simulator study of heat transfer phenomenon during the initial solidification in continuous casting mold. Metall. Mater. Trans. B, 2017, 48(2): 779.

[29] Lu C, Wang WL, Zhu CY, et al. Nakano J, Pistorius PC, Tamerler C, et al. Sub-rapid solidification study by using droplet solidification technique. Advanced Real Time Imaging II. The Minerals, Metals & Materials Series, 2019, Cham, Springer, 111.

[30] Wang WL, Cai DW, Lu C, Lyu PS, Zhu CY, Zeng J. Formation of deposited oxide film during the sub-rapid solidification of silicon steel droplet and its effect on interfacial heat transfer behavior. Metall. Mater. Trans. B, 2022, 53(1): 198.

[31] C.Y. Zhu, W.L. Wang, and C. Lu, Characterization of cermet coatings and its effect on the responding heat transfer performance in strip casting process, J. Alloys Compd., 770(2019), p. 631.

[32] Elfsberg J, Matsushita T. Measurements and calculation of interfacial tension between commercial steels and mould flux slags. Steel Res. Int., 2011, 82(4): 404.

[33] Yu Y, Cramb AW, Heard R, Fang Y, Cui J. The effect of oxygen partial pressure on heat transfer and solidification. ISIJ Int., 2006, 46(10): 1427.

[34] Lu C, Wang WL, Zeng J, Liu XY, Li HL. Effect of chromium coating roughness and thickness on interfacial heat transfer behaviour of sub-rapid solidification process. Philos. Mag., 2023, 103(2): 171.

[35] Karasangabo A, Bernhard C. Investigation of alumina wetting by Fe–Ti, Fe–P and Fe–Ti–P alloys. J. Adhes. Sci. Technol., 2012, 26(8–9): 1141.

[36] Zhu CY, Wang WL, Zeng J, Lu C, Zhou LJ, Chang J. Interactive relationship between the superheat, interfacial heat transfer, deposited film and microstructure in strip casting of duplex stainless steel. ISIJ Int., 2019, 59(5): 880.

[37] W.X. Zhou, Y. Cheng, K.Q. Cheng, G.F. Xie, T. Wang, and G. Zhang, Thermal conductivity of amorphous materials, Adv. Funct. Mater., 30(2020), No. 8, art. No. 1903829.