Acknowledgments The authors gratefully acknowledge Akers Interna- tional, SSAB and Rautaruukki for the supply of roll samples and valuable technical discussions. In addition the authors thank Dr. Arne Bengtsson for performing the GDOES analyses. References 1 J. J. DeBarbadillo and C. J. Trozzi, Mechanism of banding m hot strip mill work rolls.
Get QuoteThe surface deterioration of work rolls constitutes a significant constraint on the operation of hot mills, as the duration of rolling campaigns are greatly restricted by the surface condition of the rolls. Work roll changes account for a large proportion of downtime in the operation of hot strip mills, resulting in financial penalties for the ...
Get QuoteAppropriate work roll shifting strategy in the finishing hot strip mill can make roll wear uniform and contour smooth. To eliminate the problem of roll shifting position duplication due to available roll shifting strategy, the optimized work roll shifting strategy is proposed in the hot strip rolling mill with continuous variable crown work rolls, using the k-nearest neighbors algorithm.
Get QuoteHot Strip Mill Rolls. In the last twenty years, under the constant request for. stricter acceptance criteria of rolled product, the technical. innovations of work rolls in Hot Strip Mills have been focused. on the application and the improvement of HSS (High Speed. Steel) rolls. NSR has taken the initiative in …
Get Quotethe work roll of a rolling mill. The considered hot rolling mill consists of two hollow cylinders receiving heat in contact with the work piece and cooled by convection on its internal and external surfaces. Hsu et al. [19] considered a three dimensional inverse model for estimate the surface thermal behavior of the work Roll in hot rolling ...
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Get QuoteHot Strip Mill Rolls. We offer work rolls for finishing mills used by blast-furnace and electric-furnace steelmakers to manufacture hot strip. Rolls for H- beam Steel Mills. We offer rolls for mills that produce H- beams steel which are widely used in buildings, …
Get Quotepackages for hot-strip mills that can reduce production cost and improve product quality. Siemens VAI work-roll lubrication is designed to reduce roll wear and friction of the work rolls in the finishing mill stands. The application of work-roll lubrication in existing hot-strip mills leads to cost reductions (roll material, energy), improves
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Get QuoteThe Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.
Get QuoteLUBRICATION OF HOT-STRIP-MILL ROLLS 205 To avoid problems with front-end entry the oil was switched on by a signal from the main-drive motor load and switched off before the tail end had passed through the mill by similar means. In this way time was allowed for the oil to "burn on" the rolls before the next slab was ready for processing.
Get QuoteDownload Citation | Roll Wear Evaluation of HSS, HiCr and IC Work Rolls in Hot Strip Mill | While it is acknowledged that roll wear is one of the most challenges to hot strip mills (HSM), very few ...
Get QuoteIn a four-high hot strip mill, the finishing mill of the hot strip mill is equipped with two work-rolls and two back-up rolls and is shown in Fig. 2.During the passage of the strip between the two work rolls, a large amount of roll separating force is developed.
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Get QuoteIn hot rolling mills, premature failure of rolls is a major concern as it adversely affects the mill operation as well as production. Analysis of failed roll materials and actual rolling conditions in service are therefore necessary to understand the roll failure mechanism and thereby improve the wear resistance and extend the service life of rolls.
Get Quote1 An investigation of worn work roll materials used in the finishing stands of the hot strip mill for steel rolling M. Nilsson1,2*, M. Olsson1,2 1Dalarna University, SE-791 88 Falun, Sweden. 2Uppsala University: Ångström Laboratory, Box 534 SE-751 21, Sweden. Abstract The surface failure characteristics of different work roll materials, i.e. High Speed Steel, High Chromium Iron
Get QuoteThe mechanical rolling conditions in hot strip mills are precisely defined by various variables, which are taken directly froth the rolling schedule (separation force, torque. speed. strip thickness) or calculated from figures of the rolling schedule and dimensions of the mill (strip reduction, roll diameter etc.). These variables allow to describe the mechanical rolling conditions of all ...
Get QuoteAbstract. The heat transfer phenomenon in work rolls, used for hot rolling steel strip, has been modeled following two different approaches; the first integrating the heat flow, while the second was done integrating the temperature by means of the complex combination method, which lead at Bessel's Modified Equation, and this, is rewritten in terms of Thomson functions.
Get Quoterolling mill, dedicated roll cooling systems are required to fulfill the required functions. Examples are suitable roll cooling and lubricationsystems to fully utilize the advantages of HSS rolls in hot strip mills, and selective roll cooling systems as a method to …
Get QuoteIn hot rolling mills, premature failure of rolls is a major concern as it adversely affects the mill operation as well as production. Analysis of failed roll materials and actual rolling conditions in service are therefore necessary to understand the roll failure mechanism and thereby improve the service life of rolls. The hot strip mill referred here consists of two stands in a roughing mill ...
Get Quoteavoids uneven roll wear – rolls wear more at edges than at center. Fig. 1.5.1: Roll bending . Roll camber can be varied by 1] bending the work rolls by applying external force. 2] Shifting of work rolls laterally with respect to centerline of the strip, 3] using shaped rolls – rolls with
Get QuoteThe roll surface deterioration is affected by the temperature of roll surface, and it shortens the roll life and decreases the availability of continuous mill products. This paper deals with the roll surface deterioration by analyzing effects of rolling condition on the surface temperature of work rolls in the finishing train of hot strip mill.
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