Novel high-speed steel structure material and preparation process thereof

Abstract

The invention relates to the technical field of high-speed steel structure materials, in particular to a novel high-speed steel structure material and a preparation process thereof. Chemical components of the novel high-speed steel structure material are composed of, by weight, 0.15%-0.45% of Si, not larger than 0.03% of P, not larger than 0.03% of S, 1.15%-1.45% of W, 1.05%-1.15% of C, 8.90%-9.50% of Mo, 3.80%-4.25% of Cr, 1.25%-1.55% of V, 0.15%-0.40% of Mn, 2.75%-3.75% of Co, not larger than 0.25% of Ni, not larger than 0.30% of Cu and the balance Fe. The invention aims at providing the novel high-speed steel structure material and the preparation process of the novel high-speed steel structure material, the performance of the novel high-speed steel structure material can be equivalent to that of M42 steel, and the novel high-speed steel structure material can comprehensively replace imported M35 and domestic M42. Meanwhile, the problems that the traditional M42 steel needs a large quantity of the element Co and the thermal treatment temperature interval is narrow are solved, the yield in forging and thermal treatment production is increased, the content of the element Co is decreased to 3% from 8%, and in other words, protection of the state for precious metal resources is facilitated while cost is reduced. By means of the novel high-speed steel structure material and the preparation process, the defects that it is difficult to smash traditional M42 carbide particles and the grain size number is likely to be large are overcome, and grains and carbide are also refined.

Description

technical field [0001] The invention relates to the technical field of high-speed steel structural materials, in particular to a novel high-speed steel structural material and a preparation process thereof. Background technique [0002] M42 steel is an existing high-speed steel structure material. It is mainly used for precision and high wear-resistant metal cold stamping dies, and can also be used for precision cutting tools. It has the characteristics of high temperature hardness and high precision of processed workpieces. However, there are three areas for improvement in the existing M42 steel: [0003] M42 steel contains 8% cobalt, that is, 1 ton of M42 requires 80 kg of Co. Co is a precious metal, which not only leads to a higher price of M42 steel, but also is not conducive to the country's protection of precious metal resources. [0004] The heat treatment temperature range of M42 is narrow, which is not conducive to the production arrangement of heat treatment ente...

AI Technical Summary

Problems solved by technology

However, Co is a precious metal, which not only leads to a higher price of M42 steel, but also is not conducive to the country's protection of precious metal resources.

[0004] The heat treatment temperature range of M42 is narrow, which is not conducive to the production arrangement of heat treatment enterprises