Alloy steel material for plate hammer for yttrium-containing mines and preparation method thereof

Abstract

The invention relates to an alloy steel material for a plate hammer for yttrium-containing mines, which contains the following chemical elements in percentage by mass: 1.2-1.5% of carbon, 0.9-1.2% of silicon, 2.7-3.1% of manganese, 3.2-3.5% of chromium, 0.8-1.1% of titanium, 1.2-1.5% of niobium, 1.6-1.9% of boron, 0.03-0.05% of Y, 0.8-1.2% of Mg, at most 0.05% of S, at most 0.05% of P and the balance of iron. By using high-carbon steel as the main material and containing the boron, Y, niobium and many other alloy elements, the material has the advantages of high hardness, high wear resistance, low brittleness and favorable impact resistance; the material is suitable for working conditions with severe impact; and when the material is used for crushing high-hardness materials with the particle size of 200-400mm, the service life is prolonged by 2-3 times as compared with the traditional high-manganese steel. Part of scrap iron used as a raw material is subjected to secondary refining, the post-casting heat treatment temperature is reasonably controlled, and the raw materials are added in different batches, so that the alloy quality is more stable and uniform, thereby enhancing the comprehensive mechanical properties. When the refining agent is used for casting production, the yield is obviously enhanced, the porosity in the casting is lowered by 1-2 degrees, no pores can be generated on the casting surface, and the oxide inclusion content is obviously lowered by 2 levels or so.

Description

technical field [0001] The invention relates to the field of wear-resistant metal materials, in particular to an alloy steel material for blow bars used in yttrium-containing mines and a preparation method thereof. Background technique [0002] There are many types of hammer head materials, the most commonly used is high manganese steel, initially because of its relatively high hardness and wear resistance, but now people find that this is not the case. In some cases, high manganese steel hammer heads are not wear-resistant and have a short service life. , the reason is that high manganese steel can only produce a high hardness surface hardened layer under the condition of large impact force, but it is not wear-resistant under the condition of small impact force; there is also medium manganese steel hammer head, because of its relatively High hardness and toughness, durable and magnetic when the impact force is not too large; high chromium cast iron hammer has excellent wear...

AI Technical Summary

Problems solved by technology

[0002] There are many types of hammer head materials, the most commonly used is high manganese steel, initially because of its relatively high hardness and wear resistance, but now people find that this is not the case. In some cases, high manganese steel hammer heads are not wear-resistant and have a short service life. , the reason is that high manganese steel can only produce a high hardness surface hardened layer under the condition of large impact force, but it is not wear-resistant under the condition of small impact force; there is also medium manganese steel hammer head, because of its relatively High hardness and toughness, more durable when the impact force is not too large, and magnetic; high chromium cast iron hammer has excellent wear resistance, but poor toughness, prone to brittle fracture

All kinds of materials cannot achieve the ideal effect, so seeking reasonable materials, developing simple and practical processes, and saving resources and energy on the premise of ensuring the use requirements have become hot spots and difficulties in the field of wear-resistant materials.