Adhesion of Aluminum Alloy to Tip of Nozzle Plate of Vertical Type High Speed Twin Roll Caster

Abstract:

In a vertical type high-speed twin-roll caster, the adhesion of solidified aluminum alloy to the nozzle (ASAN) makes problems with the quality of the strip surface. The effects of the Si content of Al–Si alloys and the casting conditions on the ASAN were investigated. Alloys with Si contents of 0%, 0.5%, 1%, 2%, 3%, 6% and 10% were considered. The ASAN was high for Si contents of 0.5%, 1%, and 2%. This demonstrates that there is a relationship between the quasi-solid state and the ASAN. As the roll speed and molten metal temperature increased and solidification length decreased, the ASAN decreased. On the basis of these results, the stagnation of molten metal near the nozzle plate was investigated. A gap of 5 mm was introduced between the nozzle plate and the roll surface to eliminate the stagnation of molten metal, resulting in reduction of the ASAN.

• Periodical: Materials Science Forum (Volume 1133)
• Pages: 11-16
• DOI: https://doi.org/10.4028/p-F6UzAh
• Online since: December 2024
• Authors: Toshio Haga*, Hiizu Ochi, Hiroshi Fuse, Hisaki Watari, Shinichi Nishida
• Keywords: Adhesion of Aluminum Alloy, Nozzle Plate, Roll Speed, Si Content, Vertical Type High Speed Twin Roll Caster

References

[1] Y. Li, C. He, J. Li, Z. Wang, D. Wu, G. Xu: A novel approach to improve the microstructure and mechanical properties of Al-Mg-Si aluminum alloys during twin-roll casting, Metals 13,1713(2020).

DOI: 10.3390/ma13071713

[2] R. Cook, P. G. Groock, P. M. Thomas, D. V. Edmonds, J. D. Hunt: Development of the twin-roll casting process, J. Mater. Process. Technol. 55(2) (1995) 76-84.

DOI: 10.1016/0924-0136(95)01788-7

[3] S.Hamers, D.Smith, C.Romanowski, G.Yildizbayrak, B.Taraglio, Twin roll casting of aluminum at 2.5mm gauge. Production experience and process improvement, Light Met. (1999)931-937.

[4] P.Y. Menet, R.Cayol, J.Moriceau, Pechiney Jumbo 3CM 'TM' start-up of the Neu-Brisach thin strip caster, Light Met. (1997) 753-756.

[5] O.Daland, A.B. Espedal, M.L. Nedreberg, I.Alvestad, Thin gage twin-roll casting, process capabilities and product quality, Light Met. (1997) 745-752.

DOI: 10.1007/978-3-319-48228-6_125

[6] T. Haga, K. Takahashi, M. Ikawa: A vertical type twin roll caster for aluminum alloy strip, J. Mater. Process Technol. 140 (2003) 610-615

DOI: 10.1016/s0924-0136(03)00835-5

[7] T. Haga, Development of a twin roll caster for light metals, J. Achiev. Mater. Manuf. Eng. 43(2010) 393-402.

[8] T.Haga, M.Ikawa, H.Watari, K.Suzuki, S.Kumai, High-speed twin roll casting of thin aluminum alloy strips containing Fe impurities, Materials Transactions Vol.46(2005) 2596-2601.

DOI: 10.2320/matertrans.46.2596

[9] K.Suzuki, S.Kumai, Y.Saito, T.Haga, High-speed twin-roll strip casting of Al-Mg-Si alloys with high iron content, Materials Transactions Vol.46(2005)2602-2608.

DOI: 10.2320/matertrans.46.2602

[10] T.Haga, M.Ikawa, H.Watari, K.Suzuki, S.Kumai, 6111 aluminum alloy strip casting using an unequal diameter twin roll caster, Journal of Materials Processing and Technology, Vol.172(2006)271-276.

DOI: 10.1016/j.jmatprotec.2005.10.007

[11] T.Haga，K.Komeda，K.Matsuoka，S.Kumai，H.Watari, Roll casting of recycled AA5182, Applied Mechanics and Materials, Vol.121-126(2012)4667-4670.

DOI: 10.4028/www.scientific.net/amm.121-126.4667

[12] K. Yamazaki, T. Haga: High-Speed and Low-Load Twin-Roll Casting of Al-5%Mg Strip, Metals 13 (2023). https:// doi.org/ 10.3390/ met13010072.

DOI: 10.3390/met13010072

[13] T.Haga, Y. Kurahashi: Casting Process at Roll Bite in Strip Cast Using Vertical-Type High-Speed Twin-Roll Caster 12 metals (2022).

DOI: 10.3390/met12071169

[14] S. Kitaoka: Classification on Cracking of Aluminum Alloys 87 (2015) 526-530.