Novel high-toughness high-speed steel

Abstract

A novel high-toughness high-speed steel comprises 0.78-0.938% of C, 0.15-1.55% of Si, 0.20-0.55% of Mn, 3.5-5.0% of Cr, 0.50-2.50% of W, 2.50-6.0% of Mo, 0.50-2.20% of V, 0-2% of Co, 0-0.03% of P, 0-0.03% of S, and the balance Fe. With the adoption of the novel high-toughness high-speed steel, the novel high-speed steel adopting Mo as a base element remains certain red hardness and abrasion resistance on the premise that the red hardness elements W and Co are decreased, and meanwhile, the problems of low toughness and fatigue resistance can be solved; in addition, the contents of W and CO elements which are high in price are decreased, so that the production cost of the high-speed rail is further decreased.

Description

technical field [0001] The invention relates to the technical field of high-speed steel, in particular to a novel high-speed steel with high toughness. Background technique [0002] With the rapid development of modern industry, traditional mold steel is no longer able to meet the application requirements of modern industry. reduce. Under such a big background, many mold and application companies choose traditional high-speed steel for molds and high-speed, high-precision parts, but they can’t get the ideal state: the efficiency has not improved significantly on the basis of increasing the production cost of manufacturers. As we all know, high-speed steel is high-speed cutting tool steel, focusing on high-speed cutting, so traditional high-speed steel is developed based on the cutting conditions of various working conditions. The requirements for toughness and toughness are not high, so it is not suitable for use in precision forming and repeated fatigue environments. The ...

AI Technical Summary

Problems solved by technology

As we all know, high-speed steel is high-speed cutting tool steel, focusing on high-speed cutting, so traditional high-speed steel is developed based on the cutting conditions of various working conditions. The requirements for toughness and toughness are not high, so it is not suitable for use in precision forming and repeated fatigue environments. The representative steel grades of traditional high-speed steel are W6MO5CR4V2\W6MO5CR4V2CO5\W2MO9CR4VCO8. These steel grades are also representative steel grades in the cutting field all over the world. Bearing the heavy responsibility of cutting, heavy cutting and precision cutting, and now mold and parts enterprises have no better choice, they can only use traditional high-speed steel with cutting characteristics to produce molds and parts. Due to the traditional high-speed steel The toughness and fatigue strength are low, so the ideal use effect cannot be achieved

Secondly, W, MO, and CO are all important national reserve metals. W and CO are high red hardness elements and are very expensive. Traditional high-speed steels must be used in large quantities because they focus on cutting performance, resulting in high costs for traditional high-speed steels.