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Aluminum Alloy Current Homogenization Device and Current Homogenization Method

A technology of homogenization device and aluminum alloy, applied in the fields of heat treatment and metal materials, can solve the problem of no engineering value, and achieve the effect of improving the homogenization effect and reducing the energy consumption of homogenization

Active Publication Date: 2016-05-11
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the current electrostatic field homogenization and homogenization under a strong magnetic field can only be used as small samples for scientific research, and have no engineering value.

Method used

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  • Aluminum Alloy Current Homogenization Device and Current Homogenization Method
  • Aluminum Alloy Current Homogenization Device and Current Homogenization Method
  • Aluminum Alloy Current Homogenization Device and Current Homogenization Method

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Experimental program
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Effect test

Embodiment 1

[0053] 7050 alloy current (heat preservation) homogenization:

[0054] The chemical composition of 7050 alloy is shown in Table 1. The diameter of the aluminum alloy ingot is Φ152mm, and the microstructure of the aluminum alloy ingot is shown in Figure 4 Measured by a quantitative metallography instrument, the area fraction of the crystalline phase of the aluminum alloy ingot is 7.39%. Figure 5 In order to compare the microstructure after homogenization with the current homogenization method of the present invention and the traditional homogenization method, it can be seen from the figure that the residual phase of the grain boundary is significantly reduced after the current homogenization. The as-cast structure of 7050 alloy is mainly T phase and a small amount of Al 7 Cu 2 Fe phase, of which Al 7 Cu 2 Due to the high dissolution temperature of the Fe phase, it is basically unchanged during homogenization. The main process of homogenization is that the T phase dissolves into t...

Embodiment 2

[0056] 7050 alloy (pure) current homogenization:

[0057] The chemical composition of 7050 alloy is shown in Table 1. The diameter of the aluminum alloy ingot is Φ100mm, and the area fraction of the crystalline phase of the aluminum alloy ingot is 6.79% as measured by a quantitative metallography instrument. In this embodiment, the holding furnace 7 is not turned on. The holding furnace 7 is kept but not heated, and the aluminum alloy ingot is heated directly by Joule heat generated by the electric current, so that the aluminum alloy ingot is heated and homogenized. When the applied current intensity is 5A / mm 2 When the temperature rise of the aluminum alloy ingot is like Figure 7 As shown, it can be seen that only applying current, the resistance of the aluminum alloy ingot can also convert electrical energy into heat to heat the aluminum alloy ingot. After about 4 hours, the temperature of the aluminum alloy ingot can rise to about 460°C. By controlling the current, this tempe...

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Abstract

An aluminum alloy current equalizing device and a current equalizing method belong to the technical fields of metal materials and heat treatment. Device: It includes a conductive fixture with a cooling water channel inside, a heat preservation furnace is set between the two conductive fixtures, and a circulating fan is set up in the heat preservation furnace; the conductive fixture is connected in series with the power supply and the thermostat; one end of the thermocouple is connected to the thermostat The other end is connected to the aluminum alloy ingot in the holding furnace. Method: Set the ingot on the holding furnace through the through hole of the holding furnace so that its two ends are outside the holding furnace and the rest is inside the holding furnace; set two conductive clamps on both sides of the aluminum alloy ingot through the slots. When the cross-sectional size of the aluminum alloy ingot is large, open the holding furnace and turn on the circulating fan; heat the holding furnace to the homogenization temperature. Maintain the homogenization temperature until the end of the homogenization heat treatment; Step 5: Take out the homogenized aluminum alloy ingot.

Description

Technical field [0001] The invention belongs to the technical field of metal materials and heat treatment, and specifically relates to an aluminum alloy current homogenization device and a current homogenization method thereof; the invention is particularly suitable for highly alloyed 7XXX and 2XXX series alloys. Background technique [0002] Homogenization is an important process before processing the deformed aluminum alloy. Since most of the aluminum alloy processing blanks are prepared by the DC casting method, as a result of non-equilibrium solidification, a large number of low-melting crystalline phases are produced at the grain boundaries. Only when these crystalline phases are fully dissolved can the processing performance of the alloy and the final product be guaranteed Performance. [0003] The traditional homogenization method is to select a homogenization temperature (usually slightly lower than the solidus temperature), and then keep it for a certain period of time. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04C22F3/00
CPCC22F1/04C22F3/00
Inventor 崔建忠贾品峰何立子
Owner NORTHEASTERN UNIV LIAONING