This paper presents a novel three-dimensional characterisation of the wear effects of a roll surface on the texture transfer in skin-pass rolling. The method integrates the interactions of the microscale elastic deformation of roll surface asperities with the …

Hot rolling experiments have been conducted, using low carbon steel strips. The effects of water, oil/water emulsions, neat oil and dry conditions at the roll/strip surface, on the resulting loads ...

This paper reviews key aspects of roll wear control — roll material properties, roll pass design, and system factors such as temperature, loads and sliding …

During hot rolling, steel is deformed at roll bite at temperature ranging typically from 850 to 1150 °C. Under severe cyclic mechanical and thermal loads and in presence of abrasive scale, wear ...

The results showed that wear of backup roll was mainly consisted of sliding wear with some contribution from abrasive wear. The surface of backup roll material depicted obvious ploughing ...

Work roll wear is a key factor that affects the quality of the steel strip during the hot rolling process. With the demand for the same width steel rolling, work roll severe 'U' groove type wear appears. In this paper, it is found that work roll surface cannot reach their full potential with the conventional work roll shifting mode, which lead to severe …

A large industrial hot rolling database composed by roll wear amplitude measurements for both later finishing mill stands (F6 and F7) from ArcelorMittal Dofasco HSM was considered and a least ...

Keywords: roll wear, hot rolling, wear modeling, model calibration. Abstract. The purpose of this work is to evaluate the performance of s ome wear models, either with different math ematical formulation or different definition of the unknown wear coefficients, on the prediction of the work -roll wear amplitude in Hot Strip Mills (HSM).

1.. IntroductionThin strip has a wide application, especially in the electronic and instrument industries. Cold rolling of thin strip (such as within a thickness range of 0.1–0.15. mm) is a challenge in rolling practice, which involves the control of the strip dimensional accuracy, the strip shape and profile, the flatness, and the surface finish.. . …

This paper presents a novel three-dimensional characterisation of the wear effects of a roll surface on the texture transfer in skin-pass rolling.

1. Introduction. Fretting wear is a small amplitude vibration between mutually pressed metal surfaces. It generally occurs at tightly coupled places [1]. 25CrNi2MoV steel is a novel steel used to manufacturing crankshafts. with the development of high-speed and heavy-duty vehicles, the crankshafts failure frequently.Improving fretting wear …

Even when operating correctly, rolling element bearings will eventually fail as a result of a surface fatigue phenomenon. Rolling element bearing surface fatigue is characterized by spalling. It starts after some variable time of service as embryonic particles that are liberated from the surface of a race or rolling element in the load zone.

In this work, wear tests were performed using a custom-designed roll test rig which simulates the contact conditions between the work roll, the back-up roll and the hot-rolled steel. To simulate typical conditions occurring in a hot rolling mill, different contact pressures and rolling temperatures were considered.

As shown in Fig. 1, the ultrasonic rolling equipment mainly consists of the rolling tool part and the lathe driving part.The lathe driving part fixes and rotates the specimen with a three-jaw chuck. The rolling tool part is mounted on the tool holder of the lathe, and its main structure includes an ultrasonic generator, piezoelectric transducer, …

The surface topography of steel sheets is determined by the surface topography of the work rolls as well as the skin pass rolling parameters (rolling speed, elongation, roll force, etc.). Suitable preparation and selection of roll surface topography influences the degree of rolls wear and the surface topography of steel sheets as well.

Suitable preparation and selection of roll surface topography influences the degree of rolls wear and the surface topography of steel sheets as well., – Two-dimensional (2D) and three-dimensional (3D) roughness measurements of work roll surface before, during and after finishing of skin pass rolling of steel sheets are …

The tribological behavior during rolling and roll wear are strongly dependent on the roll surface conditions, in particular the presence of surface texture and surface modifications/coatings. However, since the nature of tribological phenomena is highly systemic and evolves with sliding time, it is very challenging to test how different roll ...

Abstract. Ultrasonic surface rolling (USR) was applied to GCr15 steel with different static loads and passes to improve the friction and wear properties, and then the fretting wear mechanism of GCr15 steel after USR treatment was systematically investigated. The results showed that the specimens treated by the USR had lower …

4.3 Effect of Roll Wear on Surface Quality of HR Coils. Two surface defects namely ridge and rolled-in-scale were observed in HR coils at HSM-2. Ridge is a buckle defect which is visible in thinner CR coils, however, it is considered to have source in HR coils. ... Tahir M (2003) Some aspects on lubrication and roll wear in rolling mills ...

Work roll wear is a key factor that affects the quality of the steel strip during the hot rolling process. With the demand for the same width steel rolling, work roll severe 'U' groove type ...

Rolling experiments revealed that thickness reduction and roll roughness are the two dominant process parameters that control wear particles generation in cold …

Introduction. Thin strip has a wide application, especially in the electronic and instrument industries. Cold rolling of thin strip (such as within a thickness range of 0.1–0.15. mm) is a challenge in rolling practice, which involves the control of the strip dimensional accuracy, the strip shape and profile, the flatness, and the surface finish.. . …

Roll wear results in a change in the roll profile, directly affecting the flatness control efficiency of the loaded roll gap, which can affect the surface quality of strip …

Figure 18 illustrates the location as the 16 degree roll angle position for the particular straight spur gear under study. ... G. Hoffman, R. Slattery, F. Hanejko, A. Rawlings, T. Murphy, Rolling Contact Fatigue of Surface Densified Material: Microstructural Aspects, Advances in Powder Metallurgy and Particulate Materials, Part …

3.2 Wear Tests at Constant Rolling Speed. Wear tests in the ball-on-disc with no running-in (as the previous study using the twin-disc set-up) were run at constant rolling speed. In Fig. 6, the friction behaviour is presented for each ground surface/lubricant combination, showing one of the three repeated wear tests. The …

One of those factors is the tires' rolling resistance. Tire rolling resistance is the energy that your vehicle needs to send to your tires to maintain movement at a consistent speed over a surface. In other words, it is the effort required to keep a tire rolling. The main contributor to rolling resistance is the process known as hysteresis.

During one roll changing period, with the increase of the rolling mileage, roll wear become more and more severe and roll thermal expansion also shows an overall growth trend. Therefore, the roll thermal expansion and wear status of rolls during the latest strip steel is directly related to the situation of the previous strips.

Roll is an important part of rolling mills. The rolling mill makes use of the pressure produced by a pair or groups of rolls to mill the steel to produce plastic deformation [1, 2].If damages of the surface are not found in time, it will affect the rolling size, shape quality and appearance of the steel sheet, reduce the corrosion resistance, wear-resistance …

DOI: 10.1016/J.WEAR.2021.203764 Corpus ID: 233639766; Surface texture transfer in skin-pass rolling with the effect of roll surface wear @article{Wu2021SurfaceTT, title={Surface texture transfer in skin-pass rolling with the effect of roll surface wear}, author={Chuhan Wu and Liangchi Zhang and Peilei Qu and Shan Qing Li and Zhenglian …

The wear mechanism of rolls is mainly given by the abrasion exerted by the oxide scale of the strip. The formation of a thin oxide scale on the roll surface seems to positively affect the roll performance [10], although contradictory results have been reported on this argument.