failure analysis of work rolls of a thin hot strip mill

ANALYSIS OF SURFACE THERMAL BEHAVIOR OF WORK

2016-4-23The 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

Case Studies in Engineering Failure Analysis

2016-12-7Case Study Failure analysis of work rolls of a thin hot strip mill Piyas a Palita * Hrishikesh R Jugadea Arvind Kumar Jhab Souvik Das b Goutam Mukhopadhyaya aMetallography Laboratories QA Group ScientificServices RD and Services Division Tata Steel Limited Jamshedpur 831 001

NPTEL :: Mechanical Engineering

2020-6-10Analysis of strip rolling -1-Quiz Questions: 45 kb: Rolling: Quiz Key: Analysis of strip rolling -1-Quiz key: 51 kb: Rolling: Quiz Questions: Analysis of strip rolling – 2-Quiz Questions: 46 kb: Rolling: Quiz Key: Analysis of strip rolling – 2-Quiz key: 62 kb: Rolling: Quiz Questions: Cold strip rolling – more accurate analysis-Quiz

ANALYSIS OF SURFACE THERMAL BEHAVIOR OF WORK

2016-4-23The 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

Thin Mining Mill

Failure analysis of work rolls of a thin hot strip mill the thin strip mill produces strips in the thickness in cost of production is therefore a challenge for steel plants and particularly their strip and sheet advanced automation system for dragon steels new hot strip mill new hot strip mill dragon steel bh electric and stainless grades

german finishing mill rolls

Failure analysis of work rolls of a thin hot strip mill 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 wear resistance and extend the service

german finishing mill rolls

Failure analysis of work rolls of a thin hot strip mill 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 wear resistance and extend the service

Thin Mining Mill

Failure analysis of work rolls of a thin hot strip mill the thin strip mill produces strips in the thickness in cost of production is therefore a challenge for steel plants and particularly their strip and sheet advanced automation system for dragon steels new hot strip mill new hot strip mill dragon steel bh electric and stainless grades

A BASIC UNDERSTANDING OF THE MECHANICS OF

2003-10-15Secondary scale on hot strip and the impact on wear is another issue Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago the results were never published but of high interest - also maybe later K H Schrder July 2003 K H Schrder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

Cold Forming Technology Analysis (Stainless Steel

For the conventional plate mill the width range of the strip can be processed is 2 5mm ~ 1500mm and the thickness is 0 25mm ~ 3 5mm For the conventional wire mill the width of the wire can be processed is 1 mm ~ 30mm and the thickness is 0 5mm ~ 10mm The shape of the machining parts is varied from simple plane to complex and closed sections

US5660070A

Tension bridles for a cold rolling reducing mill are provided The reducing mill reduces the thickness of a metal strip passing through the reducing mill The tension bridles create tension on the metal strip between the bridle and the first reducing stand to receive the metal strip and between the final reducing stand and the exit bridle so that a greater reduction can be made in the

german finishing mill rolls

Failure analysis of work rolls of a thin hot strip mill 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 wear resistance and extend the service

A Review Paper on Stress Analysis of Rolling Mill Roller

2019-4-18rolling characteristics in hot rolling for thin steel strips The characteristics were theoretically calculated and analyzed on a compact hot mill train producing ordinary steel strip with 1 2 mm final thickness A K RAY et al [2] "Failure analysis of rolls of cold rolling mill in steel plant" studied that the work rolls

Rolling mill Rolls and Roll Shop – IspatGuru

An alloy steel containing tungsten (W) and with a hardness of 40 – 50 deg Shore is very resistant to fire cracking and is sometimes used for roughing rolls in hot strip mills Cast alloy steel base rolls are made also with the analysis ranging C – 0 9 % to 2 5 % Si – 0 5 % to 1 0 % Mn – 0 4 % to 0 6 % Ni – 0 25 % to 1 0 % and Cr

Glossary

The hot-strip mill squeezes slabs which can range in thickness from two to ten inches depending on the type of continuous caster between horizontal rolls with a progressively smaller space between them (while vertical rolls govern the width) to produce a coil of flat-rolled steel about a quarter-inch in thickness and a quarter mile in length

Buehler

Buehler's sectioning mounting grinding and polishing imaging and analysis and hardness testing metallographic equipment along with consumables are used by metallurgical metallography petrography research development university laboratories quality control departments and failure analysis facilities for the analysis of all types of

A Review Paper on Stress Analysis of Rolling Mill Roller

2019-4-18rolling characteristics in hot rolling for thin steel strips The characteristics were theoretically calculated and analyzed on a compact hot mill train producing ordinary steel strip with 1 2 mm final thickness A K RAY et al [2] "Failure analysis of rolls of cold rolling mill in steel plant" studied that the work rolls

Thin Mining Mill

Failure analysis of work rolls of a thin hot strip mill the thin strip mill produces strips in the thickness in cost of production is therefore a challenge for steel plants and particularly their strip and sheet advanced automation system for dragon steels new hot strip mill new hot strip mill dragon steel bh electric and stainless grades

Axial Force Analysis and Roll Contour Configuration of

In order to analyze the influence of technical parameters on work roll axial force of four-high continuous variable crown (CVC) mill the deformation analyzing model with top roll system and strip was established based on influence function method Then a CVC work roll curve designing scheme was proposed and it was carried out on some cold rolling mill considering the requirement of

Rolling of hot strip and strip defects – IspatGuru

For rolling of hot strip the slabs are heated initially at 1100 deg C to 1300 deg C The temperature in the last finishing stand of the hot strip mill varies from 700 deg C to 900 deg C It is always to be above the upper critical temperature to produce uniform equiaxed ferrite grains

ANALYSIS OF SURFACE THERMAL BEHAVIOR OF WORK

2016-4-23The 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

Analysis of Spalling in Roughing Mill Backup Rolls of

In this paper the spalling causes of backup rolls in a roughing mill of a hot strip rolling mill were investigated 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 Springback Behaviour in Micro Flexible

This paper presents a constitutive modelling of the polycrystalline thin metal strip under a state of combined loading in microflexible rolling The concept of grained inhomogeneity is incorporated into the classic Chaboche hardening model that accounts for the Bauschinger effect in order to provide more precise description and analysis of the springback mechanism in the particular forming

Understanding Journal Bearings

use rolling element bearings Paper mill rolls often use large specialized spherical roller bearings Clearly anti-friction bearings are best for these applications However once the size of a pump (or fan or motor etc ) gets large enough and fast enough a gray area is entered

A comprehensive analysis of failure of cross bearing of

2019-4-1A universal spindle consists of a shaft at centre a flange at motor side and a wobbler at work role side Flange and wobbler are connected to shaft by cross bearings Cross bearing transmits rotatory power of shaft up to an angle of 15 degree as a result required strip thickness between work rolls can be achieved by changing the work rolls gap

2006 Analysis of hot rolling events that lead to ridge

2018-4-18presence of ridge in the hot-rolled strip in turn ridge occurrence is related to uneven wear of the work-rolls in the finishing-mill Uneven wear is most likely caused by failure of the tertiary scale due most probably to uneven cooling and/or lubrication patterns during the hot

Thin Mining Mill

Failure analysis of work rolls of a thin hot strip mill the thin strip mill produces strips in the thickness in cost of production is therefore a challenge for steel plants and particularly their strip and sheet advanced automation system for dragon steels new hot strip mill new hot strip mill dragon steel bh electric and stainless grades