Cast steel roller and fabrication technology thereof

Abstract

The invention discloses a cast steel roller which comprises an alloy outer layer and a core part, wherein the alloy outer layer comprises the following chemical components by weight percentage: 1.50-2.20% of C, less than or equal to 0.060% of Si, 0.40-1.20% of Mn, less than or equal to 0.030% of P, less than or equal to 0.025% of S, 3.00-8.00% of Cr, 0.00-1.50% of Ni, 2.00-8.00% of Mo, 2.00-9.00% of V, 0.00-3.00% of W, 0.00-0.85% of Nb, 0.00-1.20% of Al, and the balance of Fe, and the core part comprises the following chemical components by weight percentage: 2.8-3.4% of C, 1.8-2.6% of Si, 0.3-0.6% of Mn, less than or equal to 0.08% of P, less than or equal to 0.03% of S, and 0.04-0.06% of Mg. The cast steel roller adopts the alloy outer layer and the core part comprising the above components, is good in wear resistance and obdurability, high in accident resistance, and long in service life, and can avoid rolling accidents; the alloy outer layer and the core part can be sufficiently bonded metallurgically; the use amount of elements with higher adverse effects in use is decreased; the production cost is lowered; and using conditions are improved.

Description

technical field [0001] The invention belongs to the technical field of steel rolling rolls, and in particular relates to a cast steel roll and a preparation process thereof. Background technique [0002] With the rapid development of the steel industry, the current production capacity of hot-rolled plate and strip mills in my country has reached more than 300 million tons. Rolls are important components consumed in large quantities in steel rolling production. Therefore, the quality of rolls not only affects the surface quality of rolled products , but also affects the operating rate of the rolling mill, directly restricting the economic benefits of the enterprise. At present, the most advanced roll material is the high-speed steel roll, which is different from the conventional high-speed steel formula, and has the following disadvantages: [0003] 1. The use conditions are relatively harsh, and if the roll temperature control is slightly wrong, it will peel off or even burs...

AI Technical Summary

Problems solved by technology

[0003] 1. The use conditions are relatively harsh, and if the roll temperature control is slightly wrong, it will peel off or even burst, causing rolling accidents and causing inconvenience to the user;

[0004] 2. The manufacturing process is sophisticated and complex, and the product scrap rate is high, which puts too much cost pressure on the roll manufacturer;

[0005] 3. The cost is high and the amount of steel used has not been significantly increased. It is not acceptable to the user and the supplier, and there are many quality objections and business disputes.

[0006] 4. The cost of consumables is high and consumes too much alloy resources

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