Carbon-free high-speed steel and preparation method thereof

Abstract

The invention discloses carbon-free high-speed steel and a preparation method thereof. According to the carbon-free high-speed steel provided by the invention, iron powder is introduced to replace molybdenum powder and cobalt powder, and a small amount of LaB6 is introduced to improve the tempering resistance and red hardness of the material; and through joint addition of La and B, strengthening is caused, austenite transformation is delayed, structure coarsening and desolvation of alloy elements during tempering are inhibited, so that the red hardness and the hot hardness of the Fe-Co-Mo material are improved. Meanwhile, a preparation process is simple, the cost of the raw materials is reduced, the excellent cutter material performance is shown, and a prepared cutter can keep high hardness and is not sticky under the long-time cutting action, and important application value in the industry is achieved.

Description

technical field [0001] The invention relates to the field of chipping titanium alloys, in particular to a carbon-free high-speed steel and a preparation method thereof. Background technique [0002] At present, the application of titanium alloy is becoming more and more extensive. The output of titanium processing materials in my country is more than 550,000 tons, which are used in aerospace, medicine, chemical industry, military industry, automobile, electric power, etc., represented by aerospace, medicine, military industry and marine engineering. The application proportion of high-end titanium materials is increasing year by year, but as far as the current tool materials are concerned, due to the low thermal conductivity, high chemical activity and low elastic modulus of titanium alloys, titanium alloys generate a large amount of heat during cutting and cannot be conducted. , Excessively high temperature also causes the hardness of the tool to decrease, the cutting edge wea...

AI Technical Summary

Problems solved by technology

For Fe-Co-Mo materials, the presence of a large amount of Fe elements saves the cost of raw materials, but because of the large amount of Fe elements, the excessive addition of B elements will lead to the formation of grid-like brittle iron-boron compounds, resulting in material overall brittleness

However, the addition of too little B element can not improve the hardness of the material, so it is necessary to explore the LaB 6 The effect of adding amount on the hardness of Fe-Co-Mo material

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