A kind of preparation method of alloy steel roll

Abstract

The invention discloses a preparation method for an alloy-steel roller. The preparation method comprises a smelting procedure, a forging procedure and a heat treatment procedure. In the smelting procedure, an intermediate frequency furnace is utilized for electroslag remelting, and steel scrap, pig iron, chromium iron, sponge iron and a melting additive accounting for 1 to 1.5% of the total mass of the above-mentioned raw materials are added into the intermediate frequency furnace for mixing, heating and fusing, wherein the melting additive is prepared from 10 to 15 parts of sodium oxide, 3.5 to 4.5 parts of aluminum oxide, 3 to 5 parts of potassium oxide, 6 to 8 parts of sodium carbonate, 4 to 6 parts of silicon dioxide, 11 to 15 parts of iron oxide, 0.5 to 2 parts of titanium dioxide and 5 to 10 parts of anhydrous borax. The invention overcomes defects in the prior art, designs an alloy steel material used for improving material performance of a cold roller and provides a cold roller manufacturing process capable of improving surface hardness of the cold roller and the depth of a hardness layer on the basis of usage of the alloy steel material.

Description

technical field [0001] The invention relates to a metal cold-rolled and / or hot-rolled roll, in particular to an alloy steel roll. Background technique [0002] Prior art In the metal cold rolling production process, the roll is the main deformation tool of the rolling mill. Due to the problem of the material of the roll itself and the harsh working environment in which it is located, the roll often fails or even is scrapped. Such as: excessive wear of rolls, surface roughness (orange peel), grid pits, strangulation marks, cracking and peeling, etc. But to sum up, there are only three issues: one is the level of wear resistance (including roughness resistance), the second is the depth of the effective hardened layer, and the third is the size of crack resistance (including anti-stripping). Therefore, in order to improve the service life of the cold roll, first the roll must have a suitable material with high wear resistance, the hardness of the surface of the second roll mus...

AI Technical Summary

Problems solved by technology

But to sum up, there are only three issues: one is the level of wear resistance (including roughness resistance), the second is the depth of the effective hardened layer, and the third is the size of crack resistance (including anti-stripping)

However, it is difficult to meet the above requirements with the rolls manufactured by the prior art