roughing mill rolls

Rolling of Steel in a Modern Long Product Rolling Mill ...

Tab 2 Types of rolls used in long products mills: Sl.no. Type of rolls: Surface hardness (Deg Shore) 1: Forged steel 0.75% C, Roughing stand rolls: 35: 2: Cast steel – 0 to 0.5% Mo + Ni, Cr, Mn, Strong, tough, resistant to fire cracking: 30-42: 3: Pearlitic grain rolls, Cast iron, Strong tough and resistant to fire cracking, Strand rolls: 30 ...


Steel Rolling Mill Machine: Hot Rolling Roll

The hot strip mill consists of roughing mill and finishing mill. The vertical scale breaking roll used in roughing mill is made of cast steel, which has the characteristics of slow-rolling speed, high temperature, and easy to produce hot crack defects. Nodular cast iron and graphite steel roller have been used for trial, and the effect is better.


3B(2) Deformation of Rolling Mill

The mill modulus is 500-1,000 ton/mm for plate rolling mills and 400-600 ton/mm for cold rolling mills. The larger the diameter of the back-up rolls, the higher the mill modulus. A rolling force of the order of 1,000 tons is generated during rolling, so …


(PDF) Camber and wedge compensation in hot strip rolling

In this work, such a roughing mill and its edger rolls are considered. A mathematical model for the motion and the camber of the plate is derived. Based on this model, a …


Roughing Mill | Hot Rolling Steel | AMETEK Land

The mill rolls take an initial thickness reduction in preparation for the finishing stands, Steel temperature must be monitored to meet parameters and prevent roll damage. Solutions: SPOT R100 or LSP-HD 10.


CN103264047B - Roughing method for improving surface ...

The roughing method is applicable to process formulation of high-speed wire rod mills during production of cold heading steel and rivet and screw steel by means of process parameter optimization of steel billet rolling beginning temperature, steel billet corner temperature, roughing pass design, rolling speed, roll states and the like, and is ...


Rolling mill Rolls and Roll Shop – IspatGuru

Heavy mills (blooming, slabbing and heavy roughing) use the lower grades (up to 0.60 % C) while billet roughing stands use the higher grades. The addition of about 0.5 % Mo to this type of roll together with small amounts of Ni and Cr (or higher Mn) gives increased strength and reduces the severity of any fire cracks which may occur.


MBI Rolls

MBI Rolls, a division of M. Brashem, Inc., has provided the best value for quality, price and service to the steel industry for more than 30 years. We are a leading distributor of mill rolls to the north American steel mill industry, with significant share of the long bar market.


Mill Rolls - Power Components, Inc.

They are applied in roughing mills and in rolling mill intermediate stands. Forged Steel Work Rolls For Cold Strip Mills They are refined by the most modern melt shop processes, forged in hydraulic presses, resulting in excellent chemical purity, metallurgical structure and high toughness, for application in rolling mills under most stringent ...


Roughing mill: Main Drive Structure Failure Causes ...

The main drive universal jointing device is used in the main drive system of the four-roller roughing mill, installed between the main motor and the work rolls of the roughing mill, its role is to transfer the rotation and torque of the motor to the rolls. Solution of Main Drive Structure Failure


Roughing & Intermediate Rolls

Roughing & Intermediate Rolls. Stands situated from the beginning of the mill, where the stock temperature is high and the bar speed is low, the contact time and contact angle are therefore high and require a different material than later stands. The wear mechanism in roughing is predominantly thermal, resulting in fire-cracking and a poor suface.


Roughing End Mills - MSC Industrial Supply

3/4" Diam, Fine Pitch, 4" LOC, 4 Flute Cobalt Roughing Square End Mill TiN Finish, 6-1/4" OAL, 3/4" Shank Diam, Single End, 30° Helix. MSC# 84512110 Hertel (84512128) In …


GENERAL ASPECTS OF ROLL COOLING FOR HOT & COLD …

HSS rolls, often installed in the earlier stands of hot strip mills, provide improved wear resistance along with a better surface roughing resistance. However, HSS are rolls more sensitive during operation and require a higher grade of attention with regard to roll cooling than High-Cr rolls. HSS rolls need an adequate mill operating environment


Sun Hau has strivingly dedicated to steel industry e.g ...

Finishing Mill Work Roll Roughing Mill Work Roll; Magnetic Lifting System; Vacupor (low heat insulation) WDS (high thermal insulation) Electromagnetic Stirring (EMS) Induction Edge Heater; Back-up rolls / Work rolls / Ingot; SMS Meer Spare parts & Service; Premelted Slag for ESR; Lifting Solution / Wheel spare parts Universal Driveshaft Technology


Metal Rolls Manufacturer in India - Alloy Cast Steel Rolls ...

Applications: These rolls are suitable for Roughing and Intermediate Mill stands of Blooming/Slabbing, TMT Bars Mills and Wire Rod mills. Rolls for Intermediate and Finishing Stands of Structure and Strip Mills. Common Grades: SG P 47 (45°-50° Sh C) SG P 53 (50°-55° Sh C) SG P 57 (55°-60° Sh C) SG P 63 (60°-65° Sh C) Mechanical Properties:


Rolling Mill Rolls - magnesite carbon bricks supplier ...

Plate & Heavy Plate Mill. Roughing Work Roll: Finishing Work Roll: Backup Roll . Cold Strip Mill. Work Roll Intermediate Roll Temper Mill Roll: Backup Roll . Heavy Section Mill and Beam Mill. BD Roll: Edger Roll: Roll Shaft: Desicription: The main working parts and tools on the rolling mill that cause continuous plastic deformation of metal.


Cast Steel Roll Specifications Union Electric Åkers

Mills as well as Roughing Mill Work Rolls in 2-Hi Mills. This material and manufacturing method has a long history of reliability and performance in operation. In the differential hardening process, the rolls are first treated to produce the optimum tough journal neck struc-


RECENT TRENDS IN HOT STRIP ROUGHING MILLS: HIGH

Figure 1: Dominant roughing mill work roll grades in the world. Figure 2: History of HSM roughing mill work roll Grades 1950-2010. 1950 1960 1970 1980 1990 2000 ICDP / Adamite Steel/Forged steel / SG-iron/ Cast steel /Steel base Semi-HSS …


How to optimize the roughing rolling mill roll to prevent ...

The roughing mill work rolls of many hot rolling mills in the world are faced with the problem of contact fatigue in the bonding and bonding zone before reaching the scrap diameter. This phenomenon is caused by factors such as rolling steel with high resistance to deformation, long rolling cycle, increased reduction in order to increase the ...


PROCESS OF ROLLING MILLS

Rolling – The important parameters for rolling in the roughing, intermediate, and finishing group of stands in the rolling mill are temperature, percentage of reduction in …


Finishing Mill - an overview | ScienceDirect Topics

Roughing mill rolling of reheated slab: The roughing mill usually consists of one or two roughing stands in which the slab is hot rolled back and forth 5 or 7 times repeatedly to reach the minimum thickness requirement. The roughing mill also contains edger rolls that are used to roll the edge of slab and center it.


Mill Rolls | WHEMCO

Roughing Mill Work Rolls Synergy 500 & 700 FORGED STEEL WORK ROLLS 3 - 5 Cr Alloy Forged Steel 15.7 – 31.4 inches diameter 220 inches maximum overall length 13.2 tons maximum finished weight CAST STEEL BACKUP ROLLS Monoblock Alloy Cast Steel 72 inches maximum diameter 360 inches maximum overall length 75 tons maximum finished weight


rolls for rolling mill - SlideShare

Chemical Composition % Symbol C Si Mn Cr Ni Mo HCrS 1.00-1.80 0.40-1.00 0.50-1.00 8.00-15.00 0.50-1.50 1.50-4.50 Properties and Application % Symbol Hardiness HS Tensile Strength MPa Application HCrS 70-85 ≥450 (core) Roughing work rolls for hot strip mills, vertical rolls, universal section mills 7.


Roughing Mill - an overview | ScienceDirect Topics

Consider the hot rolling of a low-carbon steel strip in a single stand roughing mill. Let the entry thickness of the slab be 20 mm and its width to be 2000 mm. Its resistance to deformation is taken to be 150 MPa. It is reduced by 30% using work rolls of 800 mm diameter, rotating at 50 rpm. The coefficient of friction is taken to be 0.2.


Welcome to R.S. Udyog

ROUGHING STAND ROLLS We manufacture roughing mill rolls from diameter 300 mm to 600 mm and length from 600mm to 1200mm. The hardness of these rolls ranging from 45 degrees to 55 degrees shore C. INTERMEDIATE STAND ROLLS These rolls are manufactured in the sizes of 250mm to 360mm in diameter and length from 500mm to 600mm. ...


Analysis of Spalling in Roughing Mill Backup Rolls of Wide ...

The roughing mill withstood extreme service conditions with long service cycles for backup and work rolls, a large variety of the same width rolling campaigns, severe and non-uniform wear contours of backup and work rolls. Analysis of cyclic stress applied on backup rolls indicated that contact stress played a dominant role in rolling contact ...


Rolling Mills: 6 Different Types of Rolling Mills [Images ...

finishing mills, which will roll the steel in tandem with one another. The workhorse roughing mill has 135" wide rolls for rolling 'broadside' (as the first roughing mill is commonly called) to make a slab wider. A 5,000 hp motor drives 42"-diameter work-rolls through 28:1 gears to reduce the slab's thickness by as much as 2-½".


4 High Rolling Mill - Element

Rolling mill consisting of four rolls or known as a 4 High rolling mill is used for reducing material to extremely small thicknesses. Through the use of larger backup rolls, the issues of roll deflection can be avoided and smaller work rolls can be used. This reduction in work roll diameter: Reduces overall separating force required for reductions


(PDF) Understanding of Work Roll Corrosion and Oxidation ...

This duration represents 0.2% of the roll life at high temperature. In a finishing mill cumulated contact time between the work roll and the strip is lower compared to a roughing mill. The campaign durations are also shorter i.e. up to 3 weeks in a roughing mill compared to about 4 hours in a finishing mill.


Rolling (metalworking) - Wikipedia

Rod and wire mills with finishing rolls from 8 to 12 inches in diameter, always arranged with larger size roughing stands. Hoop and cotton tie mills, similar to small merchant bar mills. Armour plate mills with rolls from 44 to 50 inches in diameter and 140 to 180-inch body. Plate mills with rolls from 28 to 44 inches in diameter. Sheet mills ...


China SGP Roll With Roughing Mills Manufacturers ...

SGP Roll with Roughing Mills. Company Introduction. Lounsun Metallurgy Machinery Corporation was founded in 2008. Our company specializes in the production of mill rolls and rollers to be used in hot rolling mill for long products, cold rolling mill, hot strip and plate mill.


The Aluminum Rolling Process: Part Two :: Total Materia ...

A continuous rolling line casts a continuous thin slab, which progresses through a roughing mill, and then a finishing mill before being coiled, all in one, continuous process. A plate mill has one break down mill and a separate finishing mill. The plate is passes repeatedly under the same mill until the final thickness is obtained.


Rolling Mill Stands – IspatGuru

The intermediate roll allows for a reduction of the work roll diameter further than can be achieved with the four-high mill, since the ratio of two adjacent roll diameters are kept low The intermediate roll can be equipped with a side-shift mechanism with which the rolls can be moved laterally in and out over the strip edge during rolling.


Rolling Mills: 6 Different Types of Rolling Mills [Images ...

In the rolling process, the job is drawn through a set of rolls due to interface friction, and the compressive forces reduce the thickness of the workpiece or change in its cross-sectional area.. The types of rolls used in rolling mills are depended upon the shape, size and the gap between the rolls and their contour. Because of workability and limitations in …


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