Abstract. 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 ...
In this paper, we propose a machine learning based framework to establish a model that accurately predicts roll forces at each mill stands of the hot strip rolling mill. In contrast to the traditional models, the proposed expert system considers an individual model for each rolling stand and employs rolling history when predicting roll forces ...
In 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 …
As a hot strip of steel passes through a series of rolling stands that reduce and alter its shape and length, the supporting bearings must endure relentless punishment in the form of high heat, heavy and impact loads, variable speeds with rapid accelerations, and the constant presence of cooling water. All while running with accuracy to meet ...
HOT STRIP MILL — HIGHEST PERFORMANCE FOR NEW AND EXISTING STEEL MILLS. The demand for hot rolled strip is growing in multiple ways. To remain competitive, new and existing mills must be as …
Rolls are key components in hot strip mill. 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 …
PREDICTION OF HOT STRIP MILL ROLL WEAR. R. Turk, P. Fajfar, I. Peru, Faculty of Natural Science and Engineering, University of Ljubljana, R. Robiè, Slovenian Steel Company Acroni, Jesenice ...
Abstract This paper reviews the possibilities of numerical modeling for assessing the stress of backup rolls in a 2000 continuous wide-strip hot mill. Using the finite element method implemented in the SIMULIA Abaqus system, the maximum stresses in the contact area between rolls are found to occur at the beginning of chamfers. The …
Abstract. The optimal work roll crown in the finishing train of a hot strip mill should be determined so that, for all changes in strip gage, width and strength, the crown control devices can ...
With a view to the wide size range of the hot rolled strip thicknesses from 1.5 mm to 20 mm, width from 750 mm to 2200 mm as well as the conditions and costs for maintenance of the coiler station, a three roll or a four roll coiler offers a large number of practical benefits. Technical.
Abstract. Roll wear model for Hot Strip Mill (HSM) was researched and the factors affect roll wear are analyzed. The simulation program was compiled by program visual C++ language and work roll ...
Standi+1 2. ROLL SPEED SET-UP AND CONTROL A roll speed is calculated from target strip thicknesses, the target strip speed at the exit of last stand, and a forward slip computed by the set-up model to consider the slippage between a strip and a roll as follows. Vri = Vsl * htl (1 + f i ) * ht i (1) Where, Vr = roll speed, Vs = strip speed, …
work rolls in stand F0 was simulated for one week of service time in the mill. The work rolls had an initial ground crown of +0.005 inch. Fig. 7 provides an illus-tration of the effect of the roll wear for the two bar widths, i.e., 40 inches and 70 inches. Simulation results confirmed the significant impact of roll wear on the transfer bar crown.
Stelco's Lake Erie hot strip mill utilizes three slab reheating furnaces, a vertical edger & reversing rougher, a Coilbox, a six-stand finishing train, an advanced run-out table ... oxide which is inherent during the hot-rolling process. Size Availability Thickness** 0.075" - 0.625" 1.9mm - 15.9mm Max Width** 72.5"
Hot Strip Mills. Modern rolling mills that ensure product quality and mill productivity. 25/116. The Hot Strip Mill represents the most productive solution for flat rolled products. It provides the highest level of …
Strip steering, especially at the end of rolling and tail-out rips, is a main source of unscheduled downtimes in a hot strip mill (HSM). The main focus of this paper is the …
High production capacity - excellent product quality. Main data. On the 1+4 hot rolling line strips of all kinds of aluminum and aluminum alloys with best surface quality, excellent thickness profile and flatness tolerances and perfect final rolling temperature. Layout of semi-continuous aluminum mill. Let's get in touch!
Your Capacity and Production Requirements. The first step in selecting a rolling mill is assessing your production requirements. Determine the desired capacity and volume of steel you need to process. …
A 1400 mm wide × 4 mm thick strip is hot rolled down to 3 mm thickness (this corresponds to the last stand of a Hot Strip Mill). The rolls (600 mm diameter, 1600 mm barrel length) are assumed rigid in the simulation; to mimic roll bending effects on stress patterns and profile defects, they have been given a negative (concave) parabolic crown ...
The objective in a hot strip mill is to roll thick slabs into thin strips. Slabs are the semi-finished steel product which are produced in a continuous casting machine. Reheating furnaces are used to heat slabs. When they reach a temperature of around 1,240 deg C, they are lifted out of the furnace on to the roller table. Roller tables are used ...
Sault Ste. Marie, ON Dominion : Engineering . Works 1982 (3) WB (1) 2-hi : reversing with edger, (1) 4-hi plate reversing mill with edger; HAGC (6) Pneumatic
Hot strip rolling is a rolling technology of hot rolling billets to obtain strip or thin (medium) plate, also known as hot strip rolling. There are two main ways of hot …
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, …
And then, the effects of strip) width, rolling rhythm and work roll shifting on roll thermal crown were analyzed. It is found that work roll shifting can disperse the thermal expansion of the roll body especially the edge to make roll thermal contour uniform. The effect of work roll shifting on roll thermal crown is mainly concentrated in ...
Hot rolling. This process stretches a slab into a strip. The slab is reheated to approximately 1250°C and rolled in hot conditions. The resultant strip steel is wound into a roll like toilet paper (hot coil). Chains for lifting; …
The thickness range varies from 1.2 mm to 25.4 mm and the width range is from 700 mm to 2100 mm. The process layout of some of the mills allows production of more than 5 …
Stelco's Lake Erie hot strip mill utilizes three slab reheating furnaces, a vertical edger & reversing rougher, a Coilbox, a six-stand finishing train, an advanced run-out table …
To ensure product uniformity, hot rolling mills need reliable, repeatable process control data to identify operating issues; off-gauge and off-tolerance product results in the downgrading or even scrapping of coils. However, when hot material exits the rolling mill, the vertical position and orientation of the strip is not sufficiently defined ...
1. Two High Rolling Mills. It contains two heavy rolls fixed one over the other. The rolls are supported in bearing housed in sturdy upright frames (called stands) which are grouted to the rolling mill floor. The vertical gap between the roll is adjustable. The rolls rotate in opposite directions and are driven by electrical motors.
Work rolls of hot steel strip mills suffer high amount of wear through abrasive, adhesive and fatigue modes. Abrasive oxide, high temperature adhesion and cyclic thermal and mechanical loads promote high wear rate of rolls. Studies carried out at finishing stands of the two HSMs reveal that with increasing amount of steel rolled with a …
Advanced work roll cooling and thermal crown control in the new algoma steel DSPC finishing mill. E. Crisà E. Donini M. Rotti. Engineering, Materials Science. 1999. Algoma is using a new roll thermal crown control system to improve strip crown and flatness control for a wide range of product thicknesses and grades. 2.
25/116. The Hot Strip Mill represents the most productive solution for flat rolled products. It provides the highest level of productivity together with a large product mix and outstanding quality. Yearly productivity of Hot …
The tension value of Ut of hot roll strip mill. Strip width (mm) h ≤ 2.5 2.5 < h ≤ 3.0 3.0 < h ≤ 5.0 5.0 < h Unit tension (MPa) 16.02 14.56 12.41 11.17 where σ is yield stress. Yield torque which strip bending deformation needed occupies a …
60 in. Hot Strip Mill with Coil Box Making, Shaping and Treating of Steel: 101 HEATING: Slab is heated to temperature required for rolling (2400ºF) via combustion of natural gas. …