Preparation method of nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet

An aluminum alloy sheet and nanoparticle technology, which is applied in the field of preparation of aluminum alloy sheets, can solve the problems of complex densification and forming of large-size aluminum alloy sheets, poor mechanical properties at room temperature and high temperature, and high cost, so as to improve equipment utilization, Outstanding high temperature mechanical properties and the effect of improving density

Inactive Publication Date: 2012-09-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing method for preparing densified and formed large-size aluminum alloy plates is complicated in process, high in cost, and often has defects, and the prepared Al-Fe-Cr-Ti-Re alloy plate has poor room temperature and high temperature mechanical properties. problem, and provide a nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet preparation method

Method used

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  • Preparation method of nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet
  • Preparation method of nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet
  • Preparation method of nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet

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specific Embodiment approach 1

[0010] Specific implementation mode 1: This implementation mode is a method for preparing a nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy plate, which is specifically completed according to the following steps:

[0011] 1. Preparation of alloy powder by gas atomization: first prepare 5%-6.5% Fe, 3.1%-4.1% Cr, 2.8%-3.8% Ti, 0.01-2% Re and Al as the balance according to the mass percentage, and then prepare the The percentage preparation is 5%~6.5%Fe, 3.1%~4.1%Cr, 2.8%~3.8%Ti, 0.01~2%Re and the balance is Al mixed in sequence, after refining and degassing, pour the melt into the gas atomization system In the powder equipment, the proportioning material is prepared into spherical alloy powder with a particle size of less than 100 μm by gas atomization method to obtain Al-Fe-Cr-Ti-Re alloy powder; 2. Cold isostatic pressing: firstly, in the rubber bag Coat a layer of zinc stearate inside the sleeve, then put the Al-Fe-Cr-Ti-Re alloy powder into the rubber sh...

specific Embodiment approach 2

[0019] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step two, first coat a layer of zinc stearate in the rubber sheath, then put Al-Fe-Cr-Ti-Re alloy powder into Put it in the rubber sheath, and seal it after shaking, then put it in the cavity of the cold isostatic press, and then start to inject liquid pressure medium into the cavity of the cold isostatic press until it is full, and then increase the pressure to 240MP ~ 320MPa, and Cold isostatic pressing is performed for 300s to 500s under a pressure of 240MP to 320MPa to obtain a cold isostatic blank. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the liquid pressure medium described in step 2 is anti-wear hydraulic oil, emulsion or transformer oil. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of an aluminum alloy sheet, particularly a preparation method of a nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet. The invention aims to solve the problems of complex technique, high cost and multiple defects in the existing method for preparing the compacted large-size aluminum alloy sheet, and the problem of poor mechanical properties of the prepared Al-Fe-Cr-Ti-Re alloy sheet at room temperature and high temperature. The method comprises the following steps: proportioning materials, and preparing spherical alloy powder from the refined and degassed melt by a gas atomization method; and sequentially carrying out cool isostatic pressing, canning vacuum degassing, hot isostatic pressing, hot extrusion and rolling on the alloy powder to obtain the nanoparticle-reinforced Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet. The invention is mainly used for preparing the Al-Fe-Cr-Ti-Re heat-resistant aluminum alloy sheet.

Description

technical field [0001] The invention relates to a method for preparing an aluminum alloy plate. Background technique [0002] With the development of aviation, aerospace and military industries, there is an increasing demand for heat-resistant aluminum alloys with light weight, high specific strength, and high specific stiffness, such as pistons, cylinder liners, connecting rods, and cylinder heads of tank and armored vehicle engines. Missile shells, empennages, aero-engine cylinders, blades, aircraft skins, etc. The heat-resistant aluminum alloy has sufficient oxidation resistance at high temperatures, and has the characteristics of resistance to plastic deformation (creep) and destruction under long-term action of temperature and load (dynamic and static), and at the same time has good thermal conductivity and low density. It has become a lightweight high-temperature structural material with great potential for aviation and aerospace. [0003] After using traditional str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22C1/04B22F1/00B22F3/12
Inventor 沈军冯艾寒吴静
Owner HARBIN INST OF TECH
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