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  • Some aspects on lubrication and roll wear in rolling mills

    In hot rolling, roll wear including the rolled surface degradation results from complex interactions between strip parameters (oxide characteristics, steel grades) rolls parameters (oxide types, carbide

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  • A study on wear and surface roughness of work roll in cold

    1.4 Studies carried out on roll wear 8. 1.4.1 Lubrication in cold rolling and its effect on roll wear . 8. 1.4.2 Investigation on the evolution of surface topography in cold rolling . 10. 1.4.3 . Experiments for cold work roll wear. 12. 1.4.4 Modelling of roll wear . 16

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  • CATEGORY: ROLL SURFACE INDICATIONS AFFECTS: WORK

    Unstable rolling conditions, poor roll cooling or non-uniform strip temperature can all accelerate the onset of orange peel surface. rate than the remaining carbide resulting in a measureable differential wear pattern on the roll surface. The preferential wear of the matrix and graphite

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  • A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING

    Under rolling conditions the contact area between roll and stock suffers wear, the other parts of a roll body and necks have to be considered as normal parts of designed components under high load. This means that necks should not experience plastic deformation or fatigue. However, loads in a mill are not clearly and precisely defined.

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  • Research on surface topography wear of textured work roll

    – The purpose of this paper is to build a transient wear prediction model of surface topography of textured work roll, and then to investigate the wear performance of different original textured surfaces. The surface topography of steel sheets is one of the most important surface quality indexes, which is inherited from the textured work rolls in cold rolling.

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  • A study of abrasive wear on high speed steel surface in

    Jun 01, 2017· Hence, abrasive wear occurs, and wear particles will be removed from the work roll surface. This work introduces a Discrete Element Method (DEM) model which has been applied successfully to study abrasive roll wear of HSS work roll with MC carbides embedded within the oxide layers at 650 °C.

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  • “Frequently Asked Questions about Hot Strip Mill Work Roll

    The roll surface is crucial for work rolls in hot rolling mills. We have to deal with wear, oxidation, firecracks, sticking and friction. This paper starts with temperature simulations on and below the roll surface during rolling and takes common experience into consideration.

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  • The Basic Principles of Roller Burnishing ECOROLL

    One or more rollers or balls plastify and deform the workpiece’s surface layer. This process is used when the goal is to either achieve a high-quality surface finish or when a pre-defined surface finish cannot be achieved by machining. Please refer to VDI policy 2032, where also differences between roller burnishing and rolling are explained.

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  • What is traction, friction and road grip?

    Nov 29, 2016· But when the wheels are rolling isn’t it about kinetic friction? No. When driving on a dry road, irrespective of vehicle speed, it’s the static friction that keeps the vehicle steady on course. If you look at it in a microscope and in very slow-motion the contact area of the tyre doesn’t move relative to the road surface.

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  • Supination of the foot: Causes and treatment

    Jan 10, 2018· Supination can cause more obvious signs of wear on the outside edge only. Check footprints. Wetting bare feet and stepping onto a flat surface can

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  • CATEGORY: ROLL SURFACE INDICATIONS AFFECTS: WORK

    Unstable rolling conditions, poor roll cooling or non-uniform strip temperature can all accelerate the onset of orange peel surface. rate than the remaining carbide resulting in a measureable differential wear pattern on the roll surface. The preferential wear of the matrix and graphite

    Details >
  • Surface Roughness and Wear of Work Roll Containing Ti in

    In order to reduce the times of roll grinding, the cold strip mill and roll manufacturers have developed new types of rolls such as the rolls containing Ti to increase the roll wear resistance in cold strip rolling. Results show that the new 4CrTi roll has a significant advantage of preventing decrease of the roll surface roughness.

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  • Spalling Prevention and Wear Improvement of Rolls in Steel

    Roll wear and fatigue are inevitable phenomena during hot-rolling process. Finite element (FE) analysis shows that roll profiles, especially work roll wear profile, have significant effects on contact stress distributions. Long-term effect of huge contact stress peaks in roll sides is the main factor for roll

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  • “Frequently Asked Questions about Hot Strip Mill Work Roll

    The roll surface is crucial for work rolls in hot rolling mills. We have to deal with wear, oxidation, firecracks, sticking and friction. This paper starts with temperature simulations on and below the roll surface during rolling and takes common experience into consideration.

    Details >
  • Metal Rolling Manufacturing

    Conditions include, tremendous forces, bending moments, thermal stresses, and wear. Roll materials are selected for strength, rigidity, and wear resistance. Roll materials vary dependent upon the specific metal rolling process. Common roll materials are cast iron, cast steel, and forged steel.

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  • The Basic Principles of Roller Burnishing ECOROLL

    One or more rollers or balls plastify and deform the workpiece’s surface layer. This process is used when the goal is to either achieve a high-quality surface finish or when a pre-defined surface finish cannot be achieved by machining. Please refer to VDI policy 2032, where also differences between roller burnishing and rolling are explained.

    Details >
  • MICROSTRUCTURE AND WEAR RESISTANCE OF HIGH

    WEAR RESISTANCE Work roll wear is a complex process characterized by the simultaneous operation of several surface degradation phenomena. Furthermore, the per-formance of the roll material is evaluated through technological parameters that depict the interaction of

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  • Rolling of Metals: Process and Principles (With Diagram)

    The rolling process is shown in Fig. 2.1: Rolling is done both hot and cold. It is accomplishes in rolling mills. A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc. Rollers may be plain or grooved depends upon the shape of rolled product.

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  • What is traction, friction and road grip?

    Nov 29, 2016· But when the wheels are rolling isn’t it about kinetic friction? No. When driving on a dry road, irrespective of vehicle speed, it’s the static friction that keeps the vehicle steady on course. If you look at it in a microscope and in very slow-motion the contact area of the tyre doesn’t move relative to the road surface.

    Details >
  • Supination of the foot: Causes and treatment

    Jan 10, 2018· Supination can cause more obvious signs of wear on the outside edge only. Check footprints. Wetting bare feet and stepping onto a flat surface can

    Details >
  • Everything You Need To Know About Car Ramps MicksGarage

    Dec 03, 2018· Everything you need to know about ramps: When it comes to working on your vehicle, lifting the bonnet can only allow you to do a certain amount. At some point, you’re going to have to raise the car up off the ground. Being able to lift the vehicle off the ground can not only make life easier, but it can also allow for the completion of larger jobs that that may have otherwise required you to

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  • Rolling resistance Wikipedia

    Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface.It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc., is recovered when the pressure is removed. Two forms of this are hysteresis losses (see

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  • Roll Coating an overview ScienceDirect Topics

    The simplest roll coating set-up uses a single rotating roller. The bottom half of the roller is immersed in a coating liquid bath and the upper part of the roller is in contact with the fabric substrate (Fig. 10.7).As it rotates, the coating liquid forms a film on the roller surface and part of the liquid film is transferred from the roller surface to a fabric substrate.

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  • "A study on wear and surface roughness of work roll in

    The objective of this study is to improve our understanding of the evolution and tribological behaviour of work roll surfaces in cold rolling because surface deterioration affects the quality of products and the efficiency of production. The cost of rolls is almost 25% of the cost of cold steel production. An experimental Lateral Set-testing (LST) mini-mill was developed to make use of the

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