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hot strip mill work roll lubrication

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"Frequently Asked Questions about Hot Strip Mill Work Roll

Work roll in hot strip mills wear due to friction between roll surface and hot strip. (Back up rolls wear as well, but under pressure with elastic deformation, the friction is much less.) The wear is uneven from one end of the barrel to the other. We

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US5119656A Rolling mill with offset work rolls

A rolling mill for rolling metal strip moving in a horizontal rolling direction, has work rolls which engage the strip and are supported vertically by backup rolls through which drive is applied. The work rolls are supported in the horizontal rolling direction by support rollers contacting them at locations confined to intermediate regions between the work regions and bearings.

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Hot rolling friction control through lubrication

This thesis is about the improvement of the hot rolling process. This steelmaking process turns a slab (10m long, 1.5m wide, 250mm thick) into a coiled strip (1000m long, 1m wide, 2mm thick). To obtain some metallurgical properties and to make the rolling easier, the slab is heated up to 1300 ° C and roughly rolled before going to the finishing mill. In the finishing mill the strip is rolled

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Cold Rolling Mill for Aluminium Sheet IJEAS

Novelis operates a variety of types and sizes of cold roll mills at locations around the world, including some that run at exit speeds as high as 3,000 meters per minute. STAGES IN COLD ROLLING Hot-rolled aluminium strip is cooled to room temperature and fed into the cold roll mill line. The strip is

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Effect of processing parameters on scale formation during

Three parameters for the process of hot strips rolling were chosen, in a 2 3 factorial project slab thickness, water flow of interstand cooling or ISC (top and bottom) between stands F1/F2 and F2/F3, and applied oil flow in roll gap lubrication system (work rolls F2 to F4).

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New lubrication technology for the hot strip mill

work roll of stand F2 in the hot strip mill at ArcelorMittal Dunkerque (Fig 4). Twelve noz-zles were used to lubricate the work roll at a nozzle to top of roll distance of about 120mm. The prototype oil lubrication header was installed above the conventional emulsion header and roll cooling header. With this con-

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HOT ROLLING MILL LUBRICATION APPARATUS AND PROCESS

This invention is hereby claimed as follows 1. Apparatus for applying a hot rolling mill lubricant of water and a difficultly dispersible oil to a roll stand during the presence of a workpiece in the stand, said apparatus comprising spray header means at the roll stand from which the lubricant is discharged onto the roll stand during the presence of a workpiece, a common line

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ANALYSIS OF SURFACE THERMAL BEHAVIOR OF WORK

the 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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The Effects of High-Speed Steel Roll and Lubrication on Work Roll Wear and Fatigue During Electrical Steel Strip Hot

Feb 05, 2021 · Work rolls in the hot strip mill withstand extreme service conditions, especially when electrical steels are rolled, resulting in severe roll wear and fatigue. High-speed steel (HSS) work rolls and rolling lubrication are applied to the mill to improve roll wear and fatigue. Tests show that HSS work rolls manifest good performance in wear, fatigue and oxidation

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Qualitative study and a novel solution to nozzle clogging

Nozzle clogging in roll gap lubrication (RGL) is a pain area for hot strip steel rolling. Nozzle clogging severely affects lubrication affecting rolled surface quality causing prominent hot rolling defects like banding and peel‐off phenomenon in work roll.

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Rolling Technology for Thin Steel Strip in Hot Strip Mill

2. Study with a continuous hot steel strip rolling 2.1 Calculation model for hot steel strip rolling The hot strip mill shown in was assumed as a Fig. 1 calculation model for analysis. This facility consists of one rougher and six finishing stands. Table 1 shows the rolling conditions (Case-R) based on the assumption that low carbon steel

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Rolling mill lubrication EICHELBAUM; ROBERT

BACKGROUND OF THE INVENTION. After initial hot rolling, aluminum base alloy strip and other metal strips are conventionally cold rolled with a lubricant of petroleum solvent (e.g., kerosene or normal paraffin or blends thereof) with minor additions (usually 3 or 4 percent by weight) of "natural" additives (e.g., fatty acids, esters, peanut oil or palm oil) to control viscosity, to inhibit rust

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Bearings in Work Roll Arrangement of the 7-Stand Hot-Strip

of the 7-Stand Hot-Strip Mill with BendingWL 17 526 EA. Operating data Bending force max. 1962 kN Work roll diameter 777 mm Roll body length 2 286 mm Rolling speed 1,612 m/s (Stands F1 to F4) Sealed carbonitrided* tapered roller bearings for work rolls of the stands F1 to F4Lubrication, Sealing The bearings can be greased with a

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Application of hot rolling lubrication on a reversing coil

To improve hot-steel-strip rolling mill operations trial attempts at work roll surface lubrication have been made by various investigators throughout the

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Some aspects on lubrication and roll wear in rolling mills

strip grades were used. The obtained model is tested successfully in two other hot strip mills. Contradictory to the currently used on-line model, the new model takes the work roll flattening and back-up rolls contact area into consideration. Also the influence of strip- and work roll grades is included.

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Pinch RollsXtek, Inc.

Many hot strip steel mills around the world are realizing the benefits of the Xtek Bemcalloy™ Pinch Rolls.The inherent lubrication property of the graphitic constituent in the Bemcalloy™ material, along with the natural resistance to adhesion of dissimilar metals,

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Application of hot rolling lubrication on a reversing coil/plate mill

To improve hot-steel-strip rolling mill operations trial attempts at work roll surface lubrication have been made by various investigators throughout the

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Effect of Oil Film Thickness on Lubrication Property in

In hot rolling, lubrication between the work roll and hot strip plays an important role in reducing rolling force and protecting the work roll surface. However, the tribological behavior in hot rolling has not been clarified sufficiently. In this work, the effects of oil amount on the coefficient of friction in hot rolling were

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Aluminium Rolling Lubrication part 1 Innoval Technology

Aluminium rolling lubrication Hot Rolling. View of a typical hot rolling mill showing lubricant application. During the hot rolling process, lubrication and thermal control of the work rolls are achieved by spraying oil-in-water emulsions onto the rolls in controlled patterns. The emulsion also removes any loose debris from the roll bite area

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Thermal Compensation of Work Roll Grinding in Hot Strip

36 Thermal Compensation of Work Roll Grinding in Hot Strip Mills work rolls were first measured before the grinding operation. After the uniform temperature distributions along the work roll axis were achieved, the measure-ments were carried out again to obtain the work roll profiles. 5. RESULTS The results of the experiments were used to iden-

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Development of simple equation for calculating average

Investigation of the mechanism of the surface deterioration of the work roll is very important for the development of an average wear control system used in real time in hot strip mills. This project has developed a simple equation that considers the Hertzian pressure distribution and mechanical contact between two cylinders with parallel axes

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Optimization of work roll lubrication at the hot strip mill

An efficient way to increase the operational performance of hot strip mills is to lubricate the work rolls. A series of tests have been carried out at the hot rolling mill of Chertal (Cockerill-Sambre Usinor). The main benefits which have been observed when using lubrication concern the reduction of

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Qualitative study and a novel solution to nozzle clogging problem in roll gap lubrication used in hot

Nozzle clogging in roll gap lubrication (RGL) is a pain area for hot strip steel rolling. Nozzle clogging severely affects lubrication affecting rolled surface quality causing prominent hot rolling defects like banding and peel‐off phenomenon in work roll.

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The Hot Rolling Process California Steel Industries

The 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.

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Hot Rolling Mill Hydraulic Gap Control (HGC) thickness

P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement98Another way to determine the thermal expansion of the work roll is the modelling of the heat transfer between the work rolls and the strip. This depends on the roll speed, strip thickness, the properties of the strip, roll gap, contact time and cooling parameters.

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Hot Roll Lubrication A Cost-Cutting Measure

Aug 20, 2021 · Hot roll lubrication has been known about for a long time and the latest research has demonstrated the advantage and value of this method to mill owners and their customers. The key lies in the commitment and professional approach by all concerned parties to make this method work. Increasing the Competitiveness of Hot Rolling

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Problems of Friction, Lubrication, and Materials for Rolls

mill clean oils and methods of application, then oc-currence of rolling defects such as heat streaks, chat-tering marks, slip marks, as well as lubrication for hot strip rolling. Finally, I summarize the cares to be exercised in selecting, using, and servicing rolls and the recent

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Steel mill reportS SavingS of US$51,700 throUgh a

expected bearing lubricant consumption in the work roll of the hot strip mill. it was concerned about the costs for additional lubricant and maintenance, and turned to Shell for advice. Shell reviewed Wisco's maintenance practices and lubricant performance and recommended that the company should change its lubricant to Shell Gadus S3 V460

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Managing Water Contamination toMachinery Lubrication

The mill maintenance personnel and roll shop operators can also work together to regularly inspect the chocks and seals. Chocks are the mechanical housing that holds the bearings in place and allows for sealing at the end of each roll (where lubricant comes in and most water washes out).

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FAG Rolling Bearings in Rolling Mills Schaeffler Group

Lubrication 18 Lubrication of roll neck bearings 18are used mainly in blooming mills, heavy plate mills and hot strip mills, where considerable axial forces occur in combination with low to moderate speeds. DuringThe work rolls in four-high strip mills and the rolls in two-high

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