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Current homogenizing device and current homogenizing method of aluminum alloy

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

Active Publication Date: 2015-03-11
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Current homogenizing device and current homogenizing method of aluminum alloy
  • Current homogenizing device and current homogenizing method of aluminum alloy
  • Current homogenizing device and current homogenizing method of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 7050 alloy current (insulation) homogenization:

[0054] The chemical composition of the 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 , as determined by a quantitative metallographic instrument, the area fraction of the crystalline phase of the aluminum alloy ingot is 7.39%. Figure 5 It is a comparison diagram of the microstructure after the current homogenization of the present invention and the traditional homogenization method. It can be seen from the figure that after the current homogenization, the grain boundary residual phase is significantly reduced. The as-cast structure of 7050 alloy is mainly T phase and a small amount of Al 7 Cu 2 Fe phase, where Al 7 Cu 2 Due to the high dissolution temperature, the Fe phase is basically unchanged in the homogenization. The main process of homogenization is that the T phase dissolves into the matrix, and par...

Embodiment 2

[0056] 7050 alloy (pure) current homogenization:

[0057] The chemical composition of the 7050 alloy is shown in Table 1. The diameter of the aluminum alloy ingot is Φ100 mm. The area fraction of the crystal phase of the aluminum alloy ingot is 6.79% as determined by a quantitative metallographic instrument. In this embodiment, the holding furnace 7 is not turned on, and the holding furnace 7 is kept warm without heating, and the aluminum alloy ingot is directly heated by the 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 , the temperature rise of the aluminum alloy ingot is as Figure 7 As shown, it can be seen that only by 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, and the temperature c...

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Abstract

The invention relates to a current homogenizing device and a current homogenizing method of an aluminum alloy, and belongs to the technical fields of metallic materials and heat treatment. The device comprises conductive clamps internally provided with cooling water passages, wherein an insulating furnace is arranged between the two inductive clamps, and a circulating fan is arranged inside the insulating furnace; the conductive clamps are serially connected with a power supply and a constant temperature regulator; one end of a thermoelectric couple is connected with the constant temperature regulator, and the other end of the thermoelectric couple is arranged in an aluminum alloy ingot in the insulating furnace. The method comprises the following steps: setting the ingot on the insulating furnace through through holes in the insulating furnace, so that the two ends of the ingot are positioned outside the insulating furnace, and the rest part of the ingot is positioned inside the insulating furnace; respectively setting the two conductive clamps at the two ends of the aluminum alloy ingot through clamping grooves, and fastening; when the sectional dimensions are smaller, not starting the insulating furnace; when the sectional dimensions of the aluminum alloy are larger, starting the insulating furnace, and starting the circulating fan; heating the temperature inside the insulating furnace to a homogenizing temperature, and keeping the homogenizing temperature until the homogenizing heat treatment is finished; taking out the aluminum alloy ingot after homogenization.

Description

technical field [0001] The invention belongs to the technical field of metal materials and heat treatment, and in particular relates to an aluminum alloy current homogenizing device and a current homogenizing method thereof; the invention is especially suitable for highly alloyed 7XXX and 2XXX series alloys. Background technique [0002] Homogenization treatment is an important treatment process before deformed aluminum alloy processing. Since most of the processing billets of aluminum alloy are prepared by DC casting method, as a result of non-equilibrium solidification, a large number of crystal phases with low melting point are produced at the grain boundaries. Only by fully dissolving these crystal phases 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 warm for a cer...

Claims

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Application Information

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