High-carbon low-chromium multi-element alloy casting ball material and preparation method thereof

Abstract

The invention relates to a high-carbon low-chromium multi-element alloy casting ball material, which contains the following chemical element components by mass: 3.2-3.5% of carbon, 2.1-2.3% of silicon, 3.9-4.2% of manganese, 0.2-0.5% of zinc, 2.6-2.8% of chromium, 0.8-1.1% of titanium, 0.03-0.05% of nickel, 0.4-0.5% of magnesium, 0.13-0.15% of La, 0.06-0.09% of Ho, less than or equal to 0.07% of P, less than or equal to 0.07% of S, and the balance of iron. According to the present invention, the alloy adopts rare earth elements such as La and Ho, such that the strength, the wear resistance and the hardness of the alloy are increased, and the wear resistance of the alloy is 2-3 times the wear resistance of the common casting ball and the common forging ball; the core hardness and the surface hardness are basically the same, and the scrap iron is adopted as the raw material, such that the alloy quality is uniform, and cracks are not easily generated; and the refining agent is used for casting production, wherein the porosity in the cast can be reduced by 1-2 DEG, the oxidation inclusion is at about grade 2, and the yield is significantly improved.

Description

technical field [0001] The invention relates to the field of casting grinding ball materials, in particular to a high-carbon and low-chromium multi-element alloy casting ball material and a preparation method thereof. Background technique [0002] In the prior art, cast grinding balls are widely used in industries such as cement building materials, ceramics, mine metallurgy, coal grinding in power plants, and alumina. The grinding balls are required to have good physical and mechanical properties such as high hardness, grinding resistance, no breakage, no loss of roundness, and high comprehensive efficiency of the mill. At present, the main types of grinding balls are medium manganese nodular cast iron grinding balls, low carbon white cast iron grinding balls, and high chromium cast iron grinding balls. High chromium cast iron grinding balls have excellent performance, high surface hardness and volume hardness, but low impact toughness. As the price of chromium rises, the p...

AI Technical Summary

Problems solved by technology

High chromium cast iron grinding balls have excellent performance, high surface hardness and volume hardness, but low impact toughness. As the price of chromium rises, the price of high chromium cast iron grinding balls also rises all the way; Low, short service life; medium manganese ball grinding cast iron balls are not corrosion-resistant, low original hardness, easy to break