A kind of alloy steel and preparation method thereof
A technology of alloy steel and molten steel, applied in the field of alloy steel, can solve the problems of unstable performance, high cost, incompatibility of toughness and hardness, etc., and achieve the effects of enhanced wear resistance, low cost, and improved hardness and toughness
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[0078] In addition, the present application also provides a method for preparing the above-mentioned alloy steel, which may include, for example, the following steps: preparing the alloy steel according to the chemical composition.
[0079] In an optional embodiment, the preparation includes pouring molten steel containing the above chemical composition in a ladle to obtain a casting.
[0080] In an optional embodiment, pouring may be performed at a temperature of 1520-1570°C (such as 1520°C, 1530°C, 1550°C or 1570°C, etc.).
[0081] In an optional embodiment, before pouring, the molten steel is subjected to composite modification treatment with a composite modification agent. The molten steel is obtained by smelting the chromium source, the silicon source, the manganese source, the nitrogen source, the vanadium source and the copper source which are used to provide part of the chemical composition. The composite modificator contains zirconium iron, boron iron and rare earth ...
Embodiment 1
[0104] The mass percentages of the chemical composition of the alloy steel in this example are: C: 0.45%, Mn: 1.5%, Cr: 2.2%, Si: 1.5%, V: 0.12%, Cu: 0.4%, Zr: 0.05%, B : 0.004%, N: 0.005%, Y: 0.03%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities. Wherein the Zr / N mass ratio is 10.
[0105] Its preparation method is specifically:
[0106] The steel source, chromium source, silicon source, manganese source, nitrogen source, vanadium source and copper source are melted in an intermediate frequency induction melting furnace, the melting temperature used is 1590 °C, and qualified molten steel is obtained after being treated with a deoxidizer and adjusting the composition before the furnace. Adjust the temperature of the melt to 1570 °C; pre-mix ferro-zirconium, ferro-boron and rare earth compounds and crush them to a particle size below 10 mm, and wrap them with iron sheets and dry them at 180 °C for 4 hours. The molten steel is poured into a ladle preheated ...
Embodiment 2
[0110] The mass percent of the chemical composition of the alloy steel in this example is: C: 0.40%, Mn: 1.6%, Cr: 2.5%, Si: 1.2%, V: 0.08%, Cu: 0.2%, Zr: 0.021%, B : 0.003%, N: 0.003%, Re: 0.03%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities. Wherein the Zr / N mass ratio is 7.
[0111] Its preparation method is specifically:
[0112] The steel source, chromium source, silicon source, manganese source, nitrogen source, vanadium source and copper source are melted in an intermediate frequency induction melting furnace at a melting temperature of 1650°C, and qualified molten steel is obtained after being treated with a deoxidizer and adjusting the composition before the furnace. Adjust the temperature of the melt to 1590 °C; pre-mix ferro-zirconium, ferro-boron and rare earth compounds and crush them to a particle size below 10 mm, and wrap them with iron sheets and dry them at 180 °C for 4 hours. The molten steel is poured into the ladle which has been pre...
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