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Preparation method of large-scale high-aluminum-content iron-chromium-aluminum alloy sheet material

An iron-chromium-aluminum alloy and sheet material technology, applied in metal material coating process, ion implantation plating, coating, etc. The effect of good oxidation performance, high aluminum content and simple process

Active Publication Date: 2017-01-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing method cannot prepare large-sized iron-chromium-aluminum alloy sheet materials with high aluminum content, so as to improve the oxidation resistance and corrosion resistance of such materials, and to provide a large-sized high-aluminum alloy Iron-chromium-aluminum alloy sheet material and preparation method thereof

Method used

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  • Preparation method of large-scale high-aluminum-content iron-chromium-aluminum alloy sheet material
  • Preparation method of large-scale high-aluminum-content iron-chromium-aluminum alloy sheet material

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specific Embodiment approach 1

[0019] Specific Embodiment 1: In this embodiment, the large-scale iron-chromium-aluminum alloy thin plate material with high aluminum content has a thickness of 0.1-0.3mm and a diameter of 1000mm, and the composition of the thin plate is 15.0%-20.0%Cr, 10.0%-15.0% by weight Composition of Al and a balance amount of Fe.

specific Embodiment approach 2

[0020] Specific embodiment 2: The preparation method of the large-size high-aluminum-content iron-chromium-aluminum alloy sheet material described in specific embodiment 1 is carried out according to the following steps:

[0021] 1. Put the aluminum-containing ingot into a water-cooled copper crucible, place 35 grams of tungsten and 10-15 grams of calcium fluoride on the surface of the aluminum-containing ingot, install the superalloy substrate on the substrate frame, and wipe the surface with absolute ethanol , evacuated to 1×10 -3 Pa-5×10 -3 Pa, then heat the superalloy substrate to 660-1000°C and keep it warm;

[0022] 2. Cover the superalloy substrate treated in step 1 with a baffle, increase the electron beam current to 1.6-3A, and stabilize it for 1-20 minutes, open the baffle, and deposit 1-10 μm thick on the superalloy substrate CaF 2 ;

[0023] 3. Use 1.6-3A electron beam current to evaporate the aluminum-containing ingot for 10-60min, and the vacuum degree is 1×1...

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment two is that in step one, the vacuum is pumped to 3×10 -3 Pa. Others are the same as in the second embodiment.

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Abstract

The invention relates to a large-size high-aluminum-content iron-chromium-aluminum alloy sheet material and a preparation method thereof, and aims to solve the problem that the existing method can not prepare the large-size high-aluminum-content iron-chromium-aluminum alloy sheet material. The thickness of the material is 0.1-0.3mm, and the diameter is 1000mm. The sheet comprises the following components in percentage by weight: 15.0-20.0% of Cr, 10.0-15.0% of Al and the balance of Fe. The method comprises the following steps: putting an aluminiferous ingot into a water-cooled copper crucible, heating a high-temperature alloy substrate to 650-1000 DEG C, and keeping the temperature; and evaporating the aluminiferous ingot for 10-60 minutes, and naturally cooling to 50 DEG C. The iron-chromium-aluminum alloy sheet material prepared by the method has large size (the diameter is 1000mm), and can be conveniently cut and processed into required shapes and sizes. The method belongs to the field of preparation of a metal cellular-structure upper / lower veneer sheet material for a thermal protection system.

Description

technical field [0001] The invention relates to a thin plate material and a preparation method thereof. Background technique [0002] FeCrAl alloy is a commonly used electric heating alloy material, which is widely used in electric heating components, precision instruments, chemical containers and other industries. With the development of aerospace technology, especially the development of hypersonic vehicle technology, the requirements for heat-resistant materials and structures are getting higher and higher. High-temperature alloy sheet materials in high-Mach number aircraft need to withstand higher and higher temperatures, especially for high-temperature oxidation resistance of high-temperature alloy sheet materials. The original materials and technologies can no longer meet the needs of use. In order to meet the anti-oxidation requirements of existing iron-based superalloy materials, aluminum is generally added to the composition. However, aluminum will make the materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C23C14/30C23C14/06C23C14/16
Inventor 林秀李明伟宋广平孙跃赫晓东赵轶杰钟业盛何飞赵淑媛
Owner HARBIN INST OF TECH
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