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

Active Publication Date: 2020-06-09
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

At present, if carbon steel plates are used, the sintered plates are prone to plastic deformation and have a short service life; if high-strength alloy steel plates are used, the cost is high
Although high-quality carbon structural steel 70# steel is suitable for thermal processing at high temperatures (about 750 ° C), its components contain high levels of harmful elements and inclusions, and its mechanical properties are limited.

Method used

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  • A zirconium-added high-carbon pure steel electric arc furnace smelting preparation method
  • A zirconium-added high-carbon pure steel electric arc furnace smelting preparation method
  • A zirconium-added high-carbon pure steel electric arc furnace smelting preparation method

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preparation example Construction

[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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Abstract

The invention belongs to the technical field of special steel and smelting of the steel, and relates to a zirconium-added high carbon pure steel electric arc furnace smelting preparing method. The zirconium-added high-carbon pure steel is composed of components including 0.67 to 0.75% of C, 0.15 to 0.37% of Si, 0.30 to 0.80% of Mn, not larger than 0.012% of P, not larger than 0.006% of S, 0.20 to0.50% of Cr, not larger than 0.30% of Mo, not larger than 0.30% of V, 0.002 to 0.100% of Zr, and the balance Fe and inevitable impurities. The preparing method comprises the steps of electric arc furnace smelting, LF, continuous casting treatment and the like. According to the performance results of a prepared product, the tensile strength Rm is larger than or equal to 1400 MPa, the yield strengthR0.2 is larger than or equal to 1300 MPa, the board is used for a sintered saw blade mother board, plastic deformation damage is small, the service life is prolonged, and the steel production cost islow.

Description

technical field [0001] The invention belongs to the technical field of special steel and its smelting, and relates to an electric arc furnace smelting preparation method of zirconium-added high-carbon pure steel. Background technique [0002] At present, when sintering saw blades and other plates with steel plates, they need to be heated to a certain temperature during the processing. [0003] (about 750°C), the use environment is harsh, and the material has to withstand strong tensile force and fatigue damage. At present, if carbon steel plates are used, the sintered plates are prone to plastic deformation and have a short service life; if high-strength alloy steel plates are used, the cost is high. Although high-quality carbon structural steel 70# steel is suitable for thermal processing at high temperatures (about 750 ° C), its components contain high levels of harmful elements and inclusions, and its mechanical properties are limited. [0004] Therefore, it is necessar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/28C22C38/22C22C38/24C22C33/06
CPCC22C33/06C22C38/02C22C38/04C22C38/22C22C38/24C22C38/28
Inventor 潘孝定罗俊义王德洪叶超王璞
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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