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Al-Li alloy material and preparation treatment process thereof

A treatment process and alloy material technology, applied in the field of Al-Li alloy materials and their preparation and treatment process, can solve the problems of few research reports on the anisotropy of alloy mechanical properties

Inactive Publication Date: 2016-03-30
黄晓艺
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some domestic studies have been carried out on its heat treatment process and strong plasticity, but there are still few research reports on the anisotropy of the alloy's mechanical properties.

Method used

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  • Al-Li alloy material and preparation treatment process thereof
  • Al-Li alloy material and preparation treatment process thereof
  • Al-Li alloy material and preparation treatment process thereof

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Experimental program
Comparison scheme
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Embodiment Construction

[0010] The 1420 aluminum-lithium alloy plate is provided by Southwest Aluminum, with a thickness of about 1.5mm, and its chemical composition is shown in Table 1. Firstly, the hardness test is carried out on the sample, and the age hardening curve is made. The heat treatment process of the sample is: solid solution at 450 degrees for 25 minutes, water quenching + 120e artificial aging for different times, and air cooling. Solution and artificial aging treatment were carried out in salt bath furnace and drying oven respectively. The hardness test was carried out on the HVA-10A low-load Vickers hardness machine with a load of 1kg, and more than 6 effective test values ​​were measured at each time point.

[0011]

[0012] In the rolling plane, they are cut along the rolling direction (0b), the transverse direction (90b) and the directions of 30b, 45b, and 60b with the rolling direction. The heat treatment process adopts: solid solution 450e, 25min, water quenching + artifici...

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Abstract

The invention discloses an Al-Li alloy material and a preparation treatment process thereof. The Al-Li alloy material and the preparation treatment process thereof are characterized in that in a rolling plane, clipping is conducted in the rolling direction of 0b, the transverse direction of 90b and the directions forming 30b, 45b and 60b with the rolling direction; according to the heat treatment process, solution treatment is conducted at 450 e for 25 min, water quenching and artificial aging are conducted for 4-24 h at the temperature of 120 DEG C, and air cooling is conducted. The strength in the rolling direction and the transverse direction is high, and the strength in the direction of 45b and the direction of 60b is low; but the plasticity in the direction of 45b and the direction of 60b is good, and the plasticity in the rolling direction and the transverse direction is poor.

Description

technical field [0001] The invention relates to an Al-Li alloy material and a preparation process thereof. Background technique [0002] In the aerospace industry, due to the characteristics of low density, high specific strength and specific stiffness, aluminum-lithium alloys can be used to replace conventional aluminum alloys, which can reduce the weight of components by 10% to 15%, and increase the stiffness by 15% to 20%. Because its price is much cheaper than advanced composite materials, it is considered to be the most ideal light-weight and high-strength structural material for the aerospace industry in the 21st century. The Al-Mg-Li series 1420 aluminum-lithium alloy developed by the former Soviet Union has lower density than other series of aluminum-lithium alloys, and has excellent corrosion resistance, low temperature performance and excellent weldability, so it can be used Welding replaces riveting to reduce the weight of the aircraft to a greater extent, which ...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22F1/047
Inventor 黄晓艺
Owner 黄晓艺