Description and characteristics of alloy cast steel rolls

Alloy cast steel rolls is a composition in the range of eutectic steel and over-eutectic steel, alloy content greater than 0.8% of the cast steel rolls, its carbon content is generally between 0.4% – 1.3%, and contains some chromium, nickel, molybdenum, vanadium, and other alloying elements, and its matrix organization through the normalizing + tempering heat treatment process, generally controlled for the Soxhlet and tempered Soxhlet. Typical materials such as: 60CrMnMo.65CrNiMo, 70Mn2Mo, 75CrMo, 75CrNiMo and so on.


Alloy cast steel roll matrix organization to pearlite type is dominated by a small amount of carbide, hardness range in HS 35-50; due to the matrix contains a small amount of secondary carbide, so compared with the carbon steel roll wear resistance greatly improved, at the same time, due to the lifting of the matrix in the block striated ferrite, so the impact toughness of the roll has been improved. Alloy cast steel roll performance is characterized by high strength, good toughness, has a very good bite, resistance to thermal cracking and impact resistance.
Alloy cast steel roll material has reduced carbon content, improve the degree of alloying trend, and the use of a variety of micro-alloying technology, while further improving the quality of gold treatment, so that the alloy cast steel spokes can better meet the needs of different mills.
What are the main applications of alloy cast steel rolls?
Alloy cast steel rolls are used in square/slab primary mills, roughing mills of large section steel billet and girder mills, two-roll roughing mills of plate and strip mills and large vertical rolls of scale-breaking racks, as well as the roughing mills of section steel and bar and wire rod mills.
Integral casting and composite casting support rolls are strictly alloy cast steel rolls, according to the hardness requirements to control the carbon content and the addition of different alloying elements, the production of support rolls of alloy cast steel materials, containing a high degree of chromium, molybdenum, vanadium and other alloying elements, with the increase in the alloy content, the matrix organization by the transformation of the body of the soxhlet to bainite or martensitic, and at the same time contain a high degree of hardness of the secondary carbides, the range of hardness is HS55-70, with excellent resistance and resistance to spalling.

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