High-initial-hardness alloy steel material for crusher hammer and preparation method thereof

Abstract

The invention relates to a high-initial-hardness alloy steel material for a crusher hammer, which contains the following chemical elements in percentage by mass: 1.2-1.5% of carbon, 0.7-1.1% of silicon, 3.2-3.5% of manganese, 2.6-2.8% of chromium, 1.7-1.9% of vanadium, 2.4-2.6% of molybdenum, 0.3-0.5% of Bi, 0.08-0.12% of Gd, 0.02-0.05% of Tb, 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 Gd, Tb, molybdenum, Bi and many other alloy elements, the material has the advantages of high initial hardness, high wear resistance, favorable toughness, low rupture tendency and corrosion resistance; and the material is suitable for working conditions with non-severe impact, and the service life is prolonged by 2-3 times as compared with the traditional high-manganese steel. When the refining agent is used for casting production, no pores can be generated on the casting surface, and the included oxide content is obviously lowered.

Description

technical field [0001] The invention relates to the field of wear-resistant metal materials, in particular to an alloy steel material for a crusher hammer with high original hardness 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 we...

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.