A kind of boron-added high-carbon pure steel electric arc furnace smelting preparation method

An electric arc furnace, pure steel technology, applied in electric furnaces, furnaces, furnace types, etc., can solve the problems of harmful elements, high inclusion content, limited mechanical properties, plastic deformation of plates, etc., to save precious alloying elements and reduce production costs. , the effect of small plastic deformation damage

Active Publication Date: 2020-06-30
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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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 kind of boron-added high-carbon pure steel electric arc furnace smelting preparation method
  • A kind of boron-added high-carbon pure steel electric arc furnace smelting preparation method
  • A kind of boron-added high-carbon pure steel electric arc furnace smelting preparation method

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preparation example Construction

[0029] The invention provides a preparation method of the above-mentioned high-strength carbon pure steel (namely, the boron-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:

[0030] Step 1. Ingredients:

[0031] Industrial pure iron and recarburizer (C ratio 1.0-1.2%, that is, after adding recarburizer, C in ...

Embodiment 1

[0063] In this embodiment, a 3T electric arc furnace is used for smelting, and a 3T ladle refining furnace (LF furnace).

[0064] The high-strength carbon pure steel of the present embodiment is composed of the following mass percentages:

[0065] C mn Si P S Cr Mo V B 0.68 0.65 0.24 0.011 0.006 0.28 0.021 0.08 0.0075

[0066] The balance is Fe and unavoidable impurities.

[0067] The preparation method of the present embodiment comprises the following steps:

[0068] (1) Ingredients:

[0069] Industrial pure iron and recarburizer (C ratio 1.0-1.2%) are used as raw materials for electric arc furnace smelting.

[0070] (2) Electric arc furnace smelting:

[0071] a) Melting: Spread 15Kg / T iron or active quicklime of smelting raw materials 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 help melt the material in...

Embodiment 2

[0093]In this embodiment, a 3T electric arc furnace is used for smelting, and a 3T ladle refining furnace (LF furnace).

[0094] The high-strength carbon pure steel of the present embodiment is composed of the following mass percentages:

[0095] C mn Si P S Cr Mo V B 0.75 0.80 0.37 0.012 0.006 0.50 0.3 0.3 0.1

[0096] The balance is Fe and unavoidable impurities.

[0097] The preparation method of the present embodiment comprises the following steps:

[0098] (1) Ingredients:

[0099] Industrial pure iron and recarburizer (C ratio 1.0-1.2%) are used as raw materials for electric arc furnace smelting.

[0100] (2) Electric arc furnace smelting:

[0101] a) Melting: Spread 10Kg / T iron or active quicklime of smelting raw materials 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 help melt the material in the fu...

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Abstract

The invention belongs to the technical field of special steel and smelting technologies thereof, and relates to a method for preparing boron-adding high-carbon clean steel through smelting in an electric arc furnace. The boron-adding high-carbon clean steel comprises the following components of, by mass, 0.67-0.75% of C, 0.15-0.37% of Si, 0.30-0.80% of Mn, no more than 0.012% of P, no more than 0.006% of S, 0.20-0.50% of Cr, no more than 0.30% of Mo, no more than 0.30% of V, 0.002-0.100% of B, and the balance Fe and unavoidable impurities. The preparing method comprises the steps of electric arc furnace smelting, LF furnace refining and continuous casting processing. The property result of the steel prepared through the method is as follows, the tensile strength Rm is greater than or equalto 1450 MPa, the yield strength R0.2 is greater than or equal to1350 MPa, plates of the steel are used for sintering saw-blade mother plates, the produced plastic deformation damage is small, the life of the sintering saw-blade mother plates is prolonged, and the steel is low in production cost.

Description

technical field [0001] The invention belongs to the technical field of special steel and its smelting, and relates to a method for smelting and preparing boron-added high-carbon pure steel in an electric arc furnace. Background technique [0002] At present, when steel plates are used to sinter saw blades and other plates, they need to be heated to a certain temperature (about 750°C) during the processing process. The use environment is harsh, and the materials must withstand strong tensile forces 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. [0003] Therefore, it is nec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C22C38/32C21C5/52C21C7/00C22C33/06
CPCC21C5/52C21C7/0006C21C2007/0018C22C33/006C22C33/06C22C38/02C22C38/04C22C38/22C22C38/24C22C38/32Y02P10/20
Inventor 潘孝定罗俊义王德洪叶超王璞
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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