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Large size gradient aluminum content iron-chromium-aluminum ods alloy sheet material, preparation method and application

A thin plate material, aluminum content technology, applied in the direction of metal material coating technology, chemical instruments and methods, metal layered products, etc., can solve the problem that the oxidation resistance and weldability of metal honeycomb structure laminates cannot be balanced, and achieve Good anti-oxidation performance, low process cost and simple process

Active Publication Date: 2016-05-11
HARBIN INST OF TECH
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  • Summary
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  • 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 anti-oxidation performance and weldability of the metal honeycomb structure laminates in the existing thermal protection system cannot be balanced, and to provide a preparation method for a large-scale gradient aluminum content iron-chromium-aluminum ODS alloy sheet material

Method used

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  • Large size gradient aluminum content iron-chromium-aluminum ods alloy sheet material, preparation method and application
  • Large size gradient aluminum content iron-chromium-aluminum ods alloy sheet material, preparation method and application
  • Large size gradient aluminum content iron-chromium-aluminum ods alloy sheet material, preparation method and application

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specific Embodiment approach 1

[0023] Specific embodiment 1: In this embodiment, the large-size gradient aluminum content iron-chromium-aluminum ODS alloy sheet material has a thickness of 10-300um, a diameter of 1000mm, and the weight percentage of one side of the sheet is 15.0%-40.0%Cr, 10.0%-30.0 %Al, 0.3%-0.6%Y 2 O 3 And the balance of Fe composition, the other side is composed of 15.0%-40.0%Cr, 0%-5.0%Al, 0.3%-0.6%Y by weight. 2 O 3 And the balance of Fe composition.

specific Embodiment approach 2

[0024] Embodiment 2: The method for preparing the large-size gradient aluminum content iron-chromium-aluminum ODS alloy sheet material described in the first embodiment is carried out according to the following steps:

[0025] 1. Put the aluminum-containing ingot into a water-cooled copper crucible, place 35 grams of tungsten on the surface of the aluminum-containing ingot, put the yttrium oxide ceramic column or yttrium oxide powder into another water-cooled copper crucible, and place it on the surface of the yttrium oxide ingot 10-15 grams of calcium fluoride, put the high temperature alloy substrate on the substrate holder, wipe the surface with absolute ethanol, and vacuum to 1×10 -3 Pa-5×10 -3 Pa, then heat the high-temperature alloy substrate to 650-1000℃ and keep it warm;

[0026] 2. The high-temperature alloy substrate processed in step 1 is shielded by a baffle, and the two electron beam currents are increased to 1.6-3A and 1.0-1.5A respectively, and stabilized for 1-20 min...

specific Embodiment approach 3

[0031] Specific embodiment three: This embodiment is different from the specific embodiment two in that the vacuum is evacuated to 3×10 in step one -3 Pa. Others are the same as the second embodiment.

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Abstract

The invention relates to a large-size gradient-aluminum-content iron-chromium-aluminum ODS (oxide dispersion strengthened) alloy sheet material, and a preparation method and application thereof, and aims to solve the problem of incapability of compromising oxidation resistance and weldability in the existing thermal protection system metal cellular-structure veneer sheet. The thickness of the material is 10-300 mu m, and the diameter is 1000mm; one side of the sheet is composed of Cr, Al, Y2O3 and the balance of Fe; and the other side is composed of Cr, Al, Y2O3 and the balance of Fe. The method comprises the following steps: putting an aluminiferous ingot into a water-cooled copper crucible, putting a yttrium oxide ceramic column or yttrium oxide powder into another water-cooled copper crucible, heating a high-temperature alloy substrate to 650-1000 DEG C, and keeping the temperature; and evaporating the aluminiferous ingot and yttrium oxide ceramic ingot or yttrium oxide powder, and naturally cooling to 50 DEG C. The material has favorable oxidation resistance, one side is oxidation-resistant, and the other side is easy for welding. 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 method for preparing thin plate materials. Background technique [0002] When the spacecraft re-enter the atmosphere, the surface of the spacecraft will rub against the air to generate high temperatures, and will be subjected to ultra-high-velocity impacts from tiny meteorites, space debris, and corrosion from near-Earth atmospheric rain. The thermal protection system can minimize the amount of heat entering the spacecraft and make the spacecraft body and internal components work within a reasonable temperature range. Therefore, it is an important part of the spacecraft. The patent "Metal honeycomb structure and ceramic combined cover plate for thermal protection system" (Patent No. 101791880B) proposes a metal alloy cover including a honeycomb body, an upper plate, a lower plate, a phase change material, an outer shell and a ceramic plate Plate for thermal protection system. Compared with ceramic heat-proof tiles, the metal hon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C30/00C23C14/30C23C14/06C23C14/08C23C14/16B32B3/12B32B15/04B32B9/04B32B18/00
Inventor 李明伟林秀宋广平孙跃赫晓东赵轶杰钟业盛
Owner HARBIN INST OF TECH
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