Alloy steel hammerhead material for small-size crusher and preparation method thereof

The invention relates to an alloy steel hammerhead material for a small-size crusher, which contains the following chemical elements in percentage by mass: 0.2-0.4% of carbon, 0.8-1.0% of silicon, 2.1-2.3% of manganese, 5.2-5.5% of chromium, 0.8-1.1% of molybdenum, 0.2-0.3% of vanadium, 2.6-2.8% of titanium, 0.15-0.25% of V, 0.08-0.12% of Te, 0.5-0.7% of Zr, at most 0.05% of S, at most 0.05% of P and the balance of iron. By using medium-manganese low-carbon steel as the main material, the material has favorable toughness; the material contains the Zr, V, chromium, molybdenum and many other alloy elements, and thus, has the characteristics of higher strength, excellent high temperature resistance and excellent corrosion resistance; and the material is suitable for small-size working conditions with non-severe impact, and the service life is 2-3 times longer than that of common low alloy steel. When the refining agent is used for casting production, the porosity in the casting is lowered by 1-2 degrees, and the oxide inclusions are lowered by 2 levels or so.