A zirconium-added high-carbon pure steel electric arc furnace smelting preparation method
A technology of electric arc furnace and pure steel, which is applied in the field of smelting and preparing zirconium-added high-carbon pure steel, can solve the problems of harmful elements, high content of inclusions, plastic deformation of plates, limited mechanical properties, etc., and achieve reduction of inclusion content, Small plastic deformation damage and low production cost
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[0031] The invention provides a method for preparing the above-mentioned high-strength carbon pure steel (namely the zirconium-added high-carbon pure steel of the present invention). The method is a production process with an electric arc furnace and an LF furnace as main equipment. The key feature of this preparation method is the "concentrated material principle", that is, to use industrial pure iron, high-purity recarburizer, electrolytic Mn, metal Cr elemental, Si-Fe and other metal raw materials into the furnace, so as to reduce the introduction of harmful elements and improve The purity of steel. The product is prepared by smelting active quicklime, fluorite slag or expanded perlite slag protection melting smelting, LF furnace temperature, composition adjustment and other processes. The preparation method comprises the following steps:
[0032] Step 1. Ingredients:
[0033] Industrial pure iron and recarburizer (C ratio 1.0-1.2%, that is, after adding recarburizer, C i...
Embodiment 1
[0065] In this embodiment, a 3T electric arc furnace is used for smelting, and a 3T ladle refining furnace (LF furnace).
[0066] The high-strength carbon pure steel of the present embodiment is composed of the following mass percentages:
[0067] C mn Si P S Cr Mo V Zr 0.68 0.65 0.24 0.011 0.006 0.28 0.021 0.08 0.0075
[0068] The balance is Fe and unavoidable impurities.
[0069] The preparation method of the present embodiment comprises the following steps:
[0070] (1) Ingredients:
[0071] Industrial pure iron and recarburizer (C ratio 1.0-1.2%) are used as raw materials for electric arc furnace smelting.
[0072] (2) Electric arc furnace smelting:
[0073] a) Melting: Spread 15Kg / T iron activated quicklime on the bottom of the electric arc furnace, then add the above-mentioned prepared smelting raw materials into the electric arc furnace, send electricity to melt, and blow oxygen to boost the melting until the material in the furnac...
Embodiment 2
[0095] In this embodiment, a 3T electric arc furnace is used for smelting, and a 3T ladle refining furnace (LF furnace).
[0096] The high-strength carbon pure steel of the present embodiment is composed of the following mass percentages:
[0097] C mn Si P S Cr Mo V Zr 0.75 0.80 0.37 0.012 0.006 0.50 0.3 0.3 0.1
[0098] The balance is Fe and unavoidable impurities.
[0099] The preparation method of the present embodiment comprises the following steps:
[0100] (1) Ingredients:
[0101] Industrial pure iron and recarburizer (C ratio 1.0-1.2%) are used as raw materials for electric arc furnace smelting.
[0102] (2) Electric arc furnace smelting:
[0103] a) Melting: Spread 10Kg / T iron activated quicklime on the bottom of the electric arc furnace, then add the above-mentioned prepared smelting raw materials into the electric arc furnace, send electricity to melt, and blow oxygen to boost the melting until the material in the furnace turn...
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