Wear-resisting alloy steel for mine breaking hammer and preparation method of wear-resisting alloy steel

Abstract

The invention discloses a wear-resisting alloy steel for a mine breaking hammer and a preparation method of the wear-resisting alloy steel. The wear-resisting alloy steel comprises the following chemical element components in percentage by mass: 2.2-2.4% of carbon, 1.9-2.1% of silicon, 3.0-3.2% of manganese, 9.2-9.7% of chromium, 4.1-4.3% of molybdenum, 0.4-0.5% of Al, 0.05-0.09% of Dy, not larger than 0.05% of S, not larger than 0.05% of P and the balance of Fe. According to the wear-resisting alloy steel, such elements as Cr, Mo, Al and Dy are added on the basis of high-carbon steel, a part of scrap iron is used as a raw material, secondary refining is carried out, the raw materials are fed in batches and the heat treatment temperature after casting is reasonably controlled, so that the alloy has high original hardness and wear resistance and has certain toughness, impact resistance and good corrosion resistance at the same time; the quality of the alloy is stable and uniform. The wear-resisting alloy steel disclosed by the invention is suitable for working conditions of non-severe impact and hard materials, and the service life of the wear-resisting alloy steel is about 2 times longer than that of common high-manganese steel. A refining agent disclosed by the invention is applied to casting production to obviously improve the yield.

Description

technical field [0001] The invention relates to the field of wear-resistant metal materials, in particular to a wear-resistant alloy steel material for a mining breaker 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 resistance,...

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.