Laboratory Heat Treatment of the Shell Material of the Centrifugally Cast Roll for the Last Finishing Stand of Hot Strip Mills

• Autorzy: Válek T. , Kuboň Z. , Kosňovská J.

Identyfikatory

DOI

10.24425/amm.2018.125116

• Języki publikacji: EN

Abstrakty

EN

The rolls for the hot rolling finishing stands are cast centrifugally as two or three-layer rolls. The working layer is called a shell. The material of the shell is selected according to the position of the respective roll in the final finishing stand of the rolling mill. Typically, a combination of rolls made of a high-chromium cast iron + indefinite cast iron or high-speed steel + indefinite cast iron is commonly used. Great attention has been paid to indefinite cast iron in recent years and this material received a number of modifications that led to the increase of material properties up to 20% in comparison to the ordinary indefinite cast iron. But the goals of the new generation of material for hot rollers were chosen higher: increasing of production about 30% and more. This material has specific physical properties, heat treatment requirements as well as rolling mill requirements as is stated in the paper. It is expected that introduction of this material will reduce the difference between wear of the front and finishing stands, which can extend rolling campaigns and have a positive effect on the reduction rolls exchanges, the grinding of the rolls and the reduction of downtime.

Słowa kluczowe

EN

centrifugally cast roll; high speed steel; indefinite iron; heat treatment; residual austenite

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 4
• Strony: 1859--1863
• Opis fizyczny: Bibliogr. 7 poz., fot., rys., tab.

Twórcy

autor

Válek T.

• Vítkovické Slévárny, Spol. S R.O., Halasova 2904, Vítkovice, 706 02 Ostrava, Czech Republic

autor

Kuboň Z.

• Materiálový a Metalurgický Výzkum S.R.O., Pohraniční 693/31, Vítkovice 703 00 Ostrava, Czech Republic

autor

Kosňovská J.

• Materiálový a Metalurgický Výzkum S.R.O., Pohraniční 693/31, Vítkovice 703 00 Ostrava, Czech Republic

Bibliografia

• [1] T. Válek, P. Šimon, L. Střílková, The Comparison of Selected Methods of Cast Iron Spheroidization in Industrial Conditions, Archives of Foundry Engineering 12 (2), 89-92 (2012).
• [2] L. Čamek, P. Lichý, I. Kroupová, J. Duda, J. Beňo, M. Korbáš, F. Radkovský, S. Bliznyukov, Effect of cast steel production metallurgy on the emergence of casting defects, Metalurgija 55 (4), 701-704 (2016).
• [3] J. H. Lee, J. C. Oh, J. W. Park, H. C. Lee, S. Lee, Effects of Tempering Temperature on Wear Resistance and Surface Roughness of a High Speed Steel Roll. ISIJ International (8), 859-865 (2001).
• [4] J. Hampl, T. Válek, P. Lichý, T. Elbel, Control of the metallurgical processing of ICDP cast irons, Materiali in tehnologije 48 (5), 685-688 (2014).
• [5] T. Koseki, K. Chino, Y. Kataoka, Y. Nakano, K. Yuda, Development of high speed steel rolls made by centrifugal casting. In Proceedings of the 38th Mechanical Working Steel Processing Conference, Oct. 1996 (Iron and Steel Society of AIME, Warrendale) pp. 59.
• [6] H. Hashimoto, et al. Development of High Performance Roll by Continuous Process for Cladding, ISIJ International 32 (11), 1202-1210 (1992).
• [7] V. Šumšal, V. Vodárek, P. Kawulok, Heat Treatment of HSS and SEMI HSS Steels for Production of Centrifugally Cast Rolls, Hutnické listy Ostrava: Ocelot 63 (4), 34-40 (2010).

Uwagi

EN

This paper was made with the support of TA ČR within the project TA04010223 "Research and development production of centrifugally cast rolls with a working layer intended for the last stands of finishing stands of hot strip mill” and Ministry of Education, Youth and Sports of the Czech Republic in the frame of the project LO1203 "Regional Materials Science and Technology Centre – Feasibility Program”.