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

A technology of iron-chromium-aluminum alloy and thin plate materials, which is applied in the direction of metal material coating technology, chemical instruments and methods, metal layered products, etc., can solve the problem of incompatibility between oxidation resistance and weldability, and achieve oxidation resistance Good, simple process, low process cost effect

Active Publication Date: 2016-04-13
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 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 alloy sheet material

Method used

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

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specific Embodiment approach 1

[0024] Specific implementation mode 1: In this embodiment, the large-scale iron-chromium-aluminum alloy sheet material with gradient aluminum content has a thickness of 10-300um and a diameter of 1000mm. Composed of Al and a balanced amount of Fe, the other side is composed of 15.0%-40.0% Cr, 0%-5.0% Al and a balanced amount of Fe in terms of weight percentage.

specific Embodiment approach 2

[0025] Specific embodiment 2: The preparation method of the large-scale gradient aluminum content iron-chromium-aluminum alloy thin plate material described in specific embodiment 1 is carried out according to the following steps:

[0026] 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 650-1000°C and keep it warm;

[0027] 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 ;

[0028] 3. Use 1.6-3A electron beam current to evaporate the aluminum-containing ingot for 10-60min, and the vacuum deg...

specific Embodiment approach 3

[0032] 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 gradient-aluminum-content iron-chromium-aluminum 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 and the balance of Fe; and the other side is composed of Cr, Al 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 preparation method of thin plate material. Background technique [0002] During the process of re-entering the atmosphere, the surface of the spacecraft rubbed against the air to generate high temperatures, and it was also tested by tiny meteorites, ultra-high-speed impacts from space debris, and corrosion by rainwater in the near-Earth atmosphere. The thermal protection system can minimize the heat entering the interior of the spacecraft, so that the spacecraft fuselage and internal components can work within a reasonable temperature range, so it is an important part of the spacecraft. 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 is proposed in the patent “Cover plate combined with metal honeycomb structure and ceramics for thermal protection system” (Patent No. 101791880B) Plates for thermal protection systems. Compared with cer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C30/00C23C14/30C23C14/06C23C14/16B32B3/12B32B15/04B32B9/04
Inventor 林秀李明伟宋广平孙跃赫晓东赵轶杰何飞钟业盛赵淑媛
Owner HARBIN INST OF TECH
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