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High-temperature-resistant iron-chromium-aluminum alloy and preparation method thereof

An iron-chromium-aluminum alloy and high-temperature resistant technology is applied in the field of alloy materials to achieve the effects of prolonging life, reducing dehydrogenation operations, and having a simple and easy-to-operate preparation method.

Active Publication Date: 2019-04-26
BEIJING SHOUGANG GITANE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above technical problems, the purpose of the present invention is to provide a high-temperature-resistant Fe-Cr-Al alloy and its preparation method to solve the technical problem of how to prolong the service life of Fe-Cr-Al alloy when used in a high-temperature environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-temperature-resistant iron-chromium-aluminum alloy, calculated by weight percentage, the chemical elements of the high-temperature-resistant iron-chromium-aluminum alloy are: C 0.03%, Si 0.6%, Cr 25%, Ni 0.6%, Al 6%, Ti 0.6% , Mn 0.6%, P 0.05%, S0.025%, Nb 0.1%, N 0.03%, H 0.0005%, Y 0.1%, Zr 0.1%, Fe balance.

[0032] The preparation method of the above-mentioned high-temperature-resistant iron-chromium-aluminum alloy comprises the following steps:

[0033] S1. Prepare molten steel according to the chemical elements, smelt the molten steel, and perform tapping operation. During the smelting process, aluminum powder or aluminum block is used for deoxidation; the smelting time is 80 minutes, and the tapping temperature is 1650°C ;

[0034] S2. Casting the tapping molten steel to obtain an alloy rod;

[0035] S3, using the alloy rod as an electroslag remelting electrode rod, and purifying by electroslag remelting to obtain a steel ingot;

[0036] S4. After strip...

Embodiment 2

[0043] A high-temperature-resistant iron-chromium-aluminum alloy, calculated by weight percentage, the chemical elements of the high-temperature-resistant iron-chromium-aluminum alloy are: C 0.03%, Si 0.6%, Cr 25%, Ni 0.6%, Al 6%, Ti 0.6% , Mn 0.6%, P 0.05%, S0.025%, Nb 0.1%, N 0.03%, H 0.0005%, Y 0.1%, Zr 0.1%, Fe balance.

[0044] The preparation method of the above-mentioned high-temperature-resistant iron-chromium-aluminum alloy comprises the following steps:

[0045] S1. Prepare molten steel according to the chemical elements, smelt the molten steel, and perform tapping operation. During the smelting process, aluminum powder or aluminum block is used for deoxidation; the smelting time is 80 minutes, and the tapping temperature is 1650°C ;

[0046] S2. Casting the tapping molten steel to obtain an alloy rod;

[0047] S3, using the alloy rod as an electroslag remelting electrode rod, and purifying by electroslag remelting to obtain a steel ingot;

[0048] S4. After strip...

Embodiment 3

[0055] A high-temperature-resistant iron-chromium-aluminum alloy, calculated by weight percentage, the chemical elements of the high-temperature-resistant iron-chromium-aluminum alloy are: C 0.02%, Si 0.3%, Cr 23%, Ni 0.6%, Al 3%, Ti 0.3% , Mn 0.3%, P 0.03%, S0.015%, Nb 0.06%, N 0.02%, H 0.0003%, Y 0.06%, Zr 0.06%, Fe balance.

[0056] The preparation method of the above-mentioned high-temperature-resistant iron-chromium-aluminum alloy comprises the following steps:

[0057] S1. Prepare molten steel according to the chemical elements, smelt the molten steel, and perform tapping operation. During the smelting process, aluminum powder or aluminum block is used for deoxidation; the smelting time is 65 minutes, and the tapping temperature is 1700°C ;

[0058] S2. Casting the tapping molten steel to obtain an alloy rod;

[0059] S3, using the alloy rod as an electroslag remelting electrode rod, and purifying by electroslag remelting to obtain a steel ingot;

[0060] S4. After st...

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Abstract

The invention relates to a high-temperature-resistant iron-chromium-aluminum alloy and a preparation method thereof, and belongs to the technical field of alloy materials. The high-temperature-resistant iron-chromium-aluminum alloy comprises, by weight, smaller than or equal to 0.03% of C, smaller than or equal to 0.6% of Si, 21%-25% of Cr, smaller than or equal to 0.6% of Ni, 5%-6% of Al, smallerthan or equal to 0.6% of Ti, smaller than or equal to 0.6% of Mn, smaller than or equal to 0.05% of P, smaller than or equal to 0.025% of S, 0.01%-0.1% of Nb, 0.01%-0.03% of N, smaller than or equalto 0.0005% of H, 0.03%-0.1% of Y, 0.03%-0.1% of Zr and the balance Fe. The high-temperature-resistant iron-chromium-aluminum alloy has the following advantages that firstly, when a quick life test isconducted on the iron-chromium-aluminum alloy at 1,350 DEG C, a quick life value can reach 80 hours; secondly, the iron-chromium-aluminum alloy does not contain hydrogen, hydrogen is not carried in the whole preparation process, brittle failure and cracking of the iron-chromium-aluminum alloy can be prone to occurring due to existence of hydrogen, hydrogen mixing is avoided, and dehydrogenation operation is reduced; and thirdly, the preparation method is simple and easy to operate.

Description

technical field [0001] The invention relates to a high-temperature-resistant iron-chromium-aluminum alloy and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] Iron-chromium-aluminum alloy (FeCrAl) is an electrothermal alloy with ferrite structure, the main grades are: 0Cr 13 Al 4 , 0Cr 2 1Al 5 , 0Cr 25 Al 5 and 0Cr 27 Al 7 Mo 2 And other steel types, its products are widely used in electric heating components, precision instruments, chemical containers and other industries. The material realizes the conversion of electric energy to thermal energy through Joule heat, and achieves the purpose of heating a certain area (such as a furnace) or certain items (such as food). Grain growth makes them brittle, which affects the service life of these materials in high temperature environments. [0003] Therefore, there is an urgent need in the art to prepare an iron-chromium-aluminum alloy that can be used in a h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C33/06C21C7/06C22B9/18C22C38/02C22C38/04C22C38/06C22C38/48C22C38/50
CPCC21C7/0006C21C7/06C22B9/18C22C33/04C22C33/06C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/48C22C38/50Y02P10/25
Inventor 陶科李刚王彦杰
Owner BEIJING SHOUGANG GITANE NEW MATERIALS