ROLL QUALITIES AND ECONOMIC UTILISATION OF ROLLS Umesh Singhal Divisional Manager Tata Iron & Steel Company Ltd Jamshedpur 1. ROIL QUALTITES Rolls do the most important work in a rolling mill. They constitute a very important component of the running cost of the mill. Therefore it is imperative that optimum performance be obtained from the rolls.
Rolling mills are increasingly demanding rolls capable to maintain the shape and profile much longer with the aim to extend the length of campaigns. The state of the surface is one of the criteria determining the roll change. With the aim to satisfy the mill requirements it is necessary to pay attention to the Kinetic
(a) steel; (b) grey cast iron Chapter 11 -26 Types of Cast Iron White iron – <1wt% Si, harder but brittle – eutectic carbide plus pearlite – large amount of Fe 3C formed during casting Malleable iron – the result of annealing white iron castings, 800º-900º C – cementite→graphite precipitates, clusters or rosettes – .
The high-Cr cast iron rolls are mase by centrifugal casting process,the working layer contains 12~22% Chromium,through rational chemical composition allocations and different heat treatments,the matrix can be controlled as sorbite,troosite,bainite or martensite and certain kinds of carbides,such as Cr7,C3 eutectic carbites,Cr23C6 second carbites,Mo2C carbites etc.According to different purpose ...
2.1. High-chromium white cast iron characteristics High-chromium white cast irons are ferrous alloys containing 11-30% Cr and 1.8-3.6% C along with variable amounts of molybdenum, manganese, copper and nickel [1]. The standard procedure most commonly used for the classification of this kind of cast iron alloy is ASTM A532-10 (2014).
High-chromium (22-34 per cent) Cast Iron Alloys and Their Simulated Behaviour at the Sugar Industry E Zumelzu*, 0 Opitz and C Cabezas ... The set of trials carried out with high-chrome iron alloys and the respective microstructural characteri sati ons, allowed determination of samples ...
Pearlitic Nodular Cast Iron Rolls; Bainitic Nodular Cast Iron Rolls; Cast Rolls with Grooves; Alloy Indefinite Chilled Cast Iron Rolls; HSS Rolls for Bar Mill; Sleeve And Roll Shaft; Rolls for Hot Strip And Plate Mill. High Chrome Steel Rolls; EN-HiCr Iron Rolls; Enhanced ICDP Rolls; HSS Rolls; Cast Back-up Rolls; Rolls for Cold Rolling Mill
High Chromium Irons Description High chromium irons provide excellent erosion resistance and a reasonable degree of corrosion resistance due to their high alloy content, thus surpassing all other cast irons for use in aggressive services. They are recommended for .
resulting in avoidance of roll failures from interface issues AHCS Advanced High Chrome Steel Union Electric Akers Forged and Cast Rolls ™ Core Pouring Pipe Sand Mold Hematite Chill Bonding Material Between Shell and Core Sand Mold Shell Material I mprove your roll performance by using Union Electric Åkers' re-engineered High Chromium ...
Study On The Performance Of High Chromium Cast Iron Balls With Varied Carbide Fractions And Matrix Microstructures. ... Resistant Alloyed White Cast Iron for Rolling and Pulverizing Mills, At ...