Preparation method of high-speed steel roll with compound modification treatment

Abstract

The invention discloses a method for preparing a high-speed steel roll with compound modification treatment, and belongs to the technical field of steel rolling. Melt high-speed steel roll materials in an intermediate frequency induction furnace, and control the chemical composition and mass fraction of molten steel in the furnace at 2.32‑2.49%C, 4.17‑4.33%W, 4.80‑4.98%Mo, 9.63‑9.85%Cr, 0.48 ‑0.66% Mn, 0.57‑0.81% Si, <0.035% S, <0.040% P, the balance Fe; then heat the molten steel to 1615‑1626 ° C, add aluminum after 4‑5 minutes of heat preservation, and then use wire feeding method Metamorphic treatment, and pour molten steel into the high-speed rotating mold on the centrifuge. After the high-speed steel is solidified, fill the core with ductile iron under static conditions. After quenching and tempering, high-speed steel with excellent performance and good use effect can be obtained. roll.

Description

technical field [0001] The invention discloses a method for preparing a high-speed steel roll, in particular relates to a method for preparing a high-speed steel roll with compound modification treatment, and belongs to the technical field of steel rolling. Background technique [0002] The roll is the key spare part of the steel rolling equipment. With the continuous development of hot rolling technology, higher requirements are put forward for the performance of the roll. The material of the roll is developed from ordinary infinitely chilled cast iron to high nickel-chromium infinitely chilled cast iron and high-chromium cast iron. , has been developed to high-speed steel. High-speed steel rolls have excellent red hardness and good wear resistance, and have been widely used in the field of hot rolling. In order to further improve the performance of high-speed steel rolls, Chinese invention patent CN 111151732A discloses a preparation method for high-speed steel rolls used...

AI Technical Summary

Problems solved by technology

[0005] However, in the structure of the above-mentioned high-speed steel rolls, the carbide structure of the roll body is generally coarse, and the carbides are distributed in a network shape, which leads to a decrease in the strength and toughness of the high-speed steel rolls. A roll breakage accident occurred, seriously affecting the normal use of high-speed steel rolls

In order to solve the above problems, more vanadium elements are generally added to high-speed steel rolls at home and abroad to realize the carbide from the network M 6 C-type has become an isolated distribution of MC-type carbides. However, vanadium is expensive, and the addition of a large amount of vanadium increases the production cost of high-speed steel rolls. In addition, a large amount of vanadium is added, resulting in a large size of MC-type carbides, so that high-speed steel Decreased toughness, resulting in peeling of high-speed steel rolls during use, reducing the service life of the rolls

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