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A method for smelting zirconium-added high-carbon pure steel in an intermediate frequency induction furnace

A technology of induction furnace and pure steel, which is applied in the field of smelting and preparation of zirconium-added high-carbon pure steel with intermediate frequency induction furnace, can solve the problems of harmful elements, high content of inclusions, limited mechanical properties, plastic deformation of plates, etc., and achieve the goal of reducing harmful elements The effect of bringing in, low production cost, and small plastic deformation damage

Active Publication Date: 2020-06-09
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 method for smelting zirconium-added high-carbon pure steel in an intermediate frequency induction furnace
  • A method for smelting zirconium-added high-carbon pure steel in an intermediate frequency induction furnace

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preparation example Construction

[0030] The invention provides a preparation method of the above-mentioned zirconium-added high-carbon pure steel (that is, high-strength carbon pure steel). The method is a production process with an intermediate frequency induction 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:

[0031] Step 1. Ingredients:

[0032] Industrial pure iron, recarburizer (C ratio 0.7-0.8%, that is, after adding recarburizer, C in the re...

Embodiment 1

[0062] In this embodiment, a 3T intermediate frequency induction furnace is used for smelting, and a 3T ladle refining furnace (LF furnace).

[0063] The high-strength carbon pure steel of the present embodiment is composed of the following mass percentages:

[0064] 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

[0065] The balance is Fe and unavoidable impurities.

[0066] The preparation method of the present embodiment comprises the following steps:

[0067] (1) Ingredients:

[0068] Industrial pure iron, recarburizer (C ratio 0.7-0.8%), electrolytic Mn, Si-Fe alloy, Cr bar and Mo bar are used as smelting raw materials for the intermediate frequency induction furnace.

[0069] (2) Intermediate frequency induction furnace smelting:

[0070] First spread 8Kg / T iron or active quicklime of smelting raw materials on the bottom of the intermediate frequency induction furnace, then add the above smelting raw materi...

Embodiment 2

[0091] In this embodiment, a 3T intermediate frequency induction furnace is used for smelting, and a 3T ladle refining furnace (LF furnace).

[0092] The high-strength carbon pure steel of the present embodiment is composed of the following mass percentages:

[0093] 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

[0094] The balance is Fe and unavoidable impurities.

[0095] The preparation method of the present embodiment comprises the following steps:

[0096] (1) Ingredients:

[0097] Industrial pure iron, recarburizer (C ratio 0.7-0.8%), electrolytic Mn, Si-Fe alloy, Cr bar and Mo bar are used as smelting raw materials for the intermediate frequency induction furnace.

[0098] (2) Intermediate frequency induction furnace smelting:

[0099] First spread 5Kg / T iron activated quicklime on the bottom of the intermediate frequency induction furnace, then add the above-mentioned smelting raw materials into the intermediat...

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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 medium-frequency induction 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 to 0.50% 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 medium-frequency induction furnace smelting, LF, continuous casting treatment and the like. Compared with an existing product, the product has the beneficial effects that the mechanical performance is greatly improved, the tensile strength Rm is larger than or equal to 1400 MPa, the yield strength R0.2 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 is low.

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 zirconium-added high-carbon pure steel in an intermediate frequency induction 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. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/28C22C38/24C22C38/22C22C33/06
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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