Description and characteristics of alloy cast steel rolls

Description and characteristics of alloy cast steel rolls
Alloy cast steel roll is a kind of cast steel roll with an alloy content greater than 0.8% in the range of eutectic steel and super-eutectic steel, and its carbon content is between 0.4% and 1.3%, and contains some alloying elements such as chromium, nickel, vanadium, etc., and its matrix structure is generally controlled as sostenite and tempered sostenite through the process of normalizing + tempering heat. Typical materials such as: 60CrMnMo, 65CrNiMo, 70Mn2Mo, 75CrMo, 75CrNiMo, etc.
The matrix structure of alloy cast steel rolling is mainly pearlite type, containing a small amount of carbide, and the hardness range is HS 35-50: because the matrix contains a small amount of secondary carbide, the wear resistance is greatly improved compared with carbon steel rolling, and at the same time, because the block-like strip iron responsibility in the matrix is removed, the initial impact of rolling is high. The performance characteristics of alloy cast steel rolling are high strength, good toughness, good bite resistance, hot crack resistance and impact resistance.

The material of alloy cast steel rolls has a tendency to reduce carbon content and improve the degree of alloying, and a variety of microalloying technologies are adopted, and the metallurgical quality is further improved, so that alloy cast steel rolls can better meet the application needs of different rolling mills
What are the main uses of alloy cast steel rolls?
Alloy cast steel rolls are used in the square/plate return primary rolling mill, the rough rolling of large section steel opening and rail beam rolling mills, the two-high rough rolling mill of plate and strip steel and the large vertical nickel of the scale breaking frame, and the rough rolling mill of section steel and gui wire rod judging machine.
The supporting nickel of integral casting and composite casting belongs to the alloy cast steel roll in the strict sense, according to the hardness requirements to control the carbon content and add different alloy elements, the alloy casting steel material supporting the nickel is made, containing higher chromium, group, vanadium and other alloying elements, with the increase of alloy content, the matrix structure is transformed from sosone to bainite or martensite, and at the same time contains high hardness of primary carbide, the hardness range is HS55 – 70, with excellent wear resistance and anti-spalling ability.

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