Low-carbon alloy high-speed steel

Abstract

The invention provides low-carbon alloy high-speed steel. The low-carbon alloy high-speed steel is characterized by being composed of, by weight, 0.56-0.65% of C, 0.40-0.60% of Si, 0.25-0.40% of Mn, 6.0-6.8% of Cr, 1.6-2.5% of W, 4.2-5.2% of Mo, 0.7-0.9% of V, 0.1-0.2% of Nb, 0.3-0.4% of Co, 0-0.02% of S, 0-0.025% of P, and the balance Fe. According to the high-speed steel, both the hardness and toughness are high, moreover, surface particles are uniform, fine and smooth, and a high-quality high-speed steel turning tool can be obtained.

Description

technical field [0001] The invention relates to a low-carbon alloy high-speed steel. Background technique [0002] The use performance of the paper cutting blade should not only have high sharpness and wear resistance, but also have good impact resistance and certain thermal hardness. It is very important to maintain the sharpness and sharpness of the cutting edge when cutting paper blades. The volume fraction of remaining carbides after quenching and tempering of high-speed steel is between 15% and 22%, and the size of remaining carbides is 2.5um to 15um. The carbides in the mouth are easy to fall off, which will not only reduce the sharpness, but also easily cause chipping during shearing. In recent years, we have researched, investigated, analyzed and demonstrated that if a suitable semi-high-speed steel blade steel is used, the number of carbides in the blade steel is reduced to between 3% and 8%, and the hardness of the matrix is ​​quenched and tempered while maintaini...

AI Technical Summary

Problems solved by technology

There are many patents and technical reports on semi-high-speed steel used in other tools and molds at home and abroad, but none of them are suitable for the size and quantity of carbides in paper cutting blade steel, and some of them have low hardness.