High red hard boron-containing high speed steel and preparation method thereof

Abstract

The invention discloses a high red hard boron-containing high speed steel and a preparation method thereof, and belongs to the technical field of wear-resistant material. The high red hard boron-containing high speed steel comprises the compositions of, by weight, 1.0-3.0 of B, 0.2-0.8 of C, 5.0-7.0 of Cr, 3.0-6.0 of Mo, 0.5-2.0 of Al, 0.5-1.5 of Si, 0.5-1.5 of V, 0.5-1.5 of Mn, and the balance Fe. The high red hard boron-containing high speed steel has excellent wearresistance, red hardness, and excellent harden ability. High hardness can be obtained by cooling only in the air, thus the highred hard boron-containing high speed steel is very suitable for the preparation of parts for use in high temperature wear conditions such as rolls. In addition, the production cost is low, productionprocess is simple, and promotion and application value is good.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant materials, in particular to a high-red-hardness boron-containing high-speed steel and a preparation method thereof. Background technique [0002] Roller is one of the important spare parts in steel rolling production. According to statistics, in 2013, my country's steel output exceeded 900 million tons, and the annual consumption of rolls exceeded 800,000 tons, costing more than 10 billion yuan. The large consumption of rolls will cause a huge waste of resources and energy. In addition, the roll performance is not only related to the rolling production cost and rolling mill production operation rate, but also affects the rolling stock quality to a large extent. The key measure to improve the performance of the roll is to change the material of the roll, so people have invested a lot of manpower and physics in the research of the roll material. With the development of scien...

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Problems solved by technology

[0004] However, there are still some deficiencies in the above inventions, such as: in order to ensure the performance, more precious alloy elements still need to be added, and the reduction of production cost is limited; in order to ensure the heat treatment performance of the material, the addition of W element is relatively high, Severe segregation of the solidification structure is caused; the B content is increased in order to improve the wear resistance, but the increase of the B content leads to a sharp decrease in the toughness of the material; when the addition of Al is too high, the decarburization tendency of the material during the heat treatment process is significantly increased

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