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Production and preparation method of iron-chromium-aluminum electrothermal alloy wire rod

An electrothermal alloy, iron-chromium-aluminum technology, applied in the direction of electric furnace, process efficiency improvement, furnace type, etc., can solve the problem that it is difficult to adopt high-wire rolling to produce large-coiled wire rod, long production process, uneven resistivity, etc. problems, to achieve the effect of improving thermal processing performance, improving mechanical properties, and excellent grain size

Inactive Publication Date: 2021-04-06
JIANGSU SHENYUAN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic production of electrothermal alloys mostly adopts the intermediate frequency furnace + electroslag production process, which has the disadvantages of long production process, small plate weight, high cost, uneven resistivity and poor stability.
[0003] The production of iron-chromium-aluminum coils with a coil weight of 400-1000kg is rarely reported in China. Due to the high content of Al in iron-chromium-aluminum alloys, the processing is brittle, and the billets are easily broken during thermal processing, so it is difficult to adopt high-speed wire rolling. To produce large coiled wire rods, for this reason, we propose a production and preparation method of iron-chromium-aluminum electric heating alloy wire rods

Method used

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Examples

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preparation example Construction

[0028] The present invention provides a technical solution: a production and preparation method of iron-chromium-aluminum electric heating alloy wire rod, comprising the following steps:

[0029] S1: primary smelting in an electric arc furnace, adding alloy materials such as scrap steel and high-carbon ferrochrome into the electric arc furnace for primary smelting of the alloy;

[0030] S2: Refining outside the AOD furnace, AOD furnace input and tapping composition requirements are as follows, where Si≤1.00, Mn≤0.50, P≤0.020, Ni≤0.50 for input, C≤0.05, Si≤0.20, Mn≤ for tapping 0.30, P≤0.019, Ni≤0.50, N≤0.010; end point C content ≤0.03%, end point temperature T≥1700℃, Cr and Al in tapping are added and adjusted according to the alloy composition requirements of iron-chromium-aluminum alloy, all Aluminum reduction, tapping temperature: T≥1600°C;

[0031] S3: Continuous casting, using arc-shaped billet continuous casting machine for continuous casting, using the combination of c...

example 1

[0042] Example 1, a production and preparation method of an iron-chromium-aluminum electric heating alloy wire rod, comprising the following steps:

[0043] S1: primary smelting in an electric arc furnace, adding alloy materials such as scrap steel and high-carbon ferrochrome into the electric arc furnace for primary smelting of the alloy;

[0044]S2: Refining outside the AOD furnace, AOD furnace input and tapping composition requirements are as follows, where Si≤1.00, Mn≤0.50, P≤0.020, Ni≤0.50 for input, C≤0.05, Si≤0.20, Mn≤ for tapping 0.30, P≤0.019, Ni≤0.50, N≤0.010; end point C content ≤0.01%, end point temperature T≥1900℃, Cr and Al in tapping are added and adjusted according to the alloy composition requirements of iron-chromium-aluminum alloy, all Aluminum reduction, tapping temperature: T≥1800°C;

[0045] S3: Continuous casting, using arc-shaped billet continuous casting machine for continuous casting, using the combination of crystallizer and terminal electromagnetic...

example 2

[0056] Example two, a production and preparation method of an iron-chromium-aluminum electric heating alloy wire rod, comprising the following steps:

[0057] S1: primary smelting in an electric arc furnace, adding alloy materials such as scrap steel and high-carbon ferrochrome into the electric arc furnace for primary smelting of the alloy;

[0058] S2: Refining outside the AOD furnace, AOD furnace input and tapping composition requirements are as follows, where Si≤1.00, Mn≤0.50, P≤0.020, Ni≤0.50 for input, C≤0.05, Si≤0.20, Mn≤ for tapping 0.30, P≤0.019, Ni≤0.50, N≤0.010; end point C content>0.03%, end point temperature<1700°C, Cr and Al in tapping are added and adjusted according to alloy composition requirements of iron-chromium-aluminum alloy, all aluminum Reduction, tapping temperature: T<1600°C;

[0059] S3: Continuous casting, using arc-shaped billet continuous casting machine for continuous casting, using the combination of crystallizer and terminal electromagnetic st...

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Abstract

The invention discloses a production and preparation method of an iron-chromium-aluminum electrothermal alloy wire rod. The production and preparation method comprises the following process steps of electric arc furnace melting and primary smelting, AOD external refining, continuous casting, electroslag remelting, high-speed wire rolling, wire rod annealing, acid pickling, inspection and warehousing. The method mainly comprises the production procedures of smelting, continuous casting, electroslag and high-speed wire rolling of the iron-chromium-aluminum hot-rolled wire rod. According to the production and preparation method of the iron-chromium-aluminum electrothermal alloy wire rod, on the one hand, the hot working performance is improved, and the product quality is improved; and on the other hand, a electroslag steel ingot is naturally cooled to the room temperature in a sand burying slow cooling mode, energy digestion is greatly saved, the production cost is reduced, finally, the iron-chromium-aluminum wire rod with high dimensional precision is obtained through high-speed wire rolling, the production cost is further reduced, and the production efficiency is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of iron-chromium-aluminum electrothermal alloy, in particular to a production and preparation method of iron-chromium-aluminum electrothermal alloy wire rod. Background technique [0002] Electrothermal alloys are widely used in electric heating components in the fields of machinery, metallurgy, chemical industry, food, etc., with an operating temperature of 500-1400 °C. Electric heating alloys can be divided into Ni-Cr-based austenitic alloys and Fe-Cr-Al ferritic alloys according to their metallographic structure. Among them, Fe-Cr-Al alloys are the most widely used metal electric heating element materials in my country, with a small specific gravity. , The resistivity is small, the service temperature is higher, and the heat resistance is better. It mainly includes steel types: 0Cr25A15, 0Cr21A16, 0Cr21A16Nb, 0Cr20A13, etc. At present, most domestic production of electrothermal alloys adopts the intermed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C33/04C21C5/52C22B9/18C21D8/02
CPCC22C38/18C22C38/06C22C33/04C21C5/52C22B9/18C21D8/0226Y02P10/20
Inventor 宫元生宫友军张国付涂玉国王华
Owner JIANGSU SHENYUAN SPECIAL STEEL
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