on wear is another issue Stresses from Hertzian pressure in 4high cold mill back up rolls were measured years ago the results were never published but of high interest also maybe later K H Schröder July 2003 K H Schröder A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File SCHROEDERROLLS
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12 Work Roll Material Properties The work roll for 4 Hi and 20 Hi is taken D2 material The chemical and mechanical Table 2 Chemical Composition of Roll Material The deformation of work roll of rolling mill has been divided in three sections named as Entry Elastic Deformation zone Plastic Deformation zone and Exit
High speed steel alloys are high carbon alloy steel containing Cr Mo W Co V and Nb Micro structure consist of complex carbides embedded in a tempered
All Aluminum Association published standards data specifications and other technical materials are reviewed and revised reaffirmed or withdrawn on a periodic basis Users are advised to contact The
4 h 6 h 14 h 35 °C h °C h COOLING FOR 14 HOURS The subsequent slow regular cooling period of 14 hours in the furnace is even more important Here the plates are cooled by approximately 35°C per hour If they were cooled more quickly tension and even the formation of cracks could once more occur in the material
Dec 03 2012 · 4 HI ALLOYED ROLLS FOR TMT PLANTS Special steels alloyed with nickel chromium molybdenum Used in breakdown roughing intermediate mills for finishing of heavy sections Statically cast and undergo a three stage high temperature heat treatment comprising of annealing normalizing tempering rotation
responsible for the poor life of a cold mill work roll used in a ﬁve stand 4 Hi tandem mill in an Indian A typical composition is as follows C085 Mn035 Si050 Cr2–35 M030
responsible for the poor life of a cold mill work roll used in a ve stand 4 Hi tandem mil l in an Indian steel plant It was observed that the imported rolls were giving an average life of
Our Company History The story of Haynes International spans a century of products processes and most of all people Formed in Kokomo Indiana in October 1912 the more than 100year history of Haynes’ continuous operation also captures the historic growth of many wellknown nickel and cobaltbase superalloy families
Feb 24 2017 · Material specification of 2Cr 3Cr 5Cr SemiHigh Speed Steel are available Name Type of material Hardness Depth of hardness Hardness deviation Intermediate roll 2Cr 3Cr 5Cr SHSS 7085 HSD 850mm Within 2 HSD Backup Roll Bigsized Backup Roll Forged steel backup roll is mainly used in 4Hi mill and 6Hi mill