Preparation method of complexly-modified high-speed steel roll

Abstract

The invention discloses a preparation method of a complexly-modified high-speed steel roll, and belongs to the technical field of steel rolling. A high-speed steel roll material is smelted in a medium-frequency induction furnace, and molten steel in the furnace is controlled to be prepared from the chemical compositions in percentage by mass: 2.32-2.49% of C, 4.17-4.33% of W, 4.80-4.98% of Mo, 9.63-9.85% of Cr, 0.48-0.66% of Mn, 0.57-0.81% of Si, less than 0.035% of S, less than 0.040% of P and the balance of Fe; and then the molten steel is heated to 1615-1626 DEG C, aluminum is added after heat preservation is conducted for 4-5 min, then modification treatment is conducted through a wire feeding method, the molten steel is poured into a casting mold rotating at a high speed on a centrifugal machine, after the high-speed steel is solidified, ductile iron is used for core filling in a static state, and the high-speed steel roll excellent in performance and good in using effect can be obtained through quenching and tempering treatment.

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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