Electromagnetic pulse fast solution-aging process for aluminum alloy component

An aluminum alloy component and electromagnetic pulse technology, which is applied in the field of electromagnetic pulse rapid solid solution-aging process for lightweight aluminum alloy components, can solve the problem of excessive time gap between forming and aging processes, high mass production cost, and large equipment footprint. and other problems, to achieve the effects of improving stress corrosion resistance and other comprehensive properties, shortening aging time, and reducing energy consumption

Active Publication Date: 2019-04-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the forming process of aluminum alloy components takes only a few minutes, while the aging treatment takes several hours or even more than ten hours. The time gap between the forming and aging processes is too large, and the two cannot be carried out simultaneously.
In addition, aging requires heat treatment furnaces with high energy consumption and high pollution, resulting in high cost of large-scale production, long cycle, large equipment footprint, and energy and environmental problems at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Adopting the present invention to carry out pulse electromagnetic field solid solution aging treatment on the central column of T6 state 7075 aluminum alloy, the steps are as follows: take the aluminum alloy sheet material of T6 state 7075 thickness 1.5mm as raw material, select the aluminum alloy sheet material under the cold state and place it in the pulse electric field When energized, the process parameters of the pulsed electric field are set to a current density of 25~40A / mm 2、 The frequency is 40~55Hz, the number of pulses is 20~25, and the electroplastic effect and Joule heating effect generated by the pulse current make the solute atoms of the high-strength aluminum alloy sheet completely dissolve in the aluminum matrix; the aluminum alloy sheet is quickly transferred to the Stamping forming by hot stamping machine; after hot stamping, the center column will be transferred to pulsed magnetic field for aging treatment. The process parameters of pulsed magnetic fi...

Embodiment 2

[0028] Adopting the present invention to carry out pulse electromagnetic field solution aging treatment on 6061 aluminum alloy Φ10mm pins, including the following steps: taking 6061 aluminum alloy pins as the processing object, selecting the aluminum alloy pins under the cold state and placing them in the pulse electric field for electrification, and the process parameters of the pulse electric field Set to a current density of 30~45A / mm 2 , frequency 10~25Hz, pulse number 25~30, using the electroplastic effect and Joule heating effect generated by the pulse current to make the second phase of the aluminum alloy pin completely solid solution; the aluminum alloy pin is quickly transferred to the pulse magnetic field after solid solution treatment For aging treatment, the process parameters of the pulsed magnetic field are set to frequency 1~25Hz, magnetic field strength 8000~11000A / m, and the treatment time is set to 8~12h; after the aging treatment is completed, the aluminum al...

Embodiment 3

[0031] Adopting the present invention to carry out pulse electromagnetic field solid solution aging treatment on 7A04 aluminum alloy bolts (M10), including the following steps: using 7A04 aluminum alloy bolts as materials, selecting 7A04 aluminum alloy bolts in a cold state and placing them in a pulse electric field for electrification, and the pulse electric field The process parameters are set to a current density of 30~35A / mm 2 , frequency 70~85Hz, pulse number 25~30, using the electroplastic effect and Joule heating effect generated by the pulse current to make the second phase of the aluminum alloy bolt solid solution; the aluminum alloy bolt is quickly transferred to the pulse magnetic field for solid solution treatment For aging treatment, the process parameters of the pulsed magnetic field are set to frequency 2~50Hz, magnetic field strength 12000~18000A / m, and the treatment time is set to 10~11h; after the aging treatment is completed, the aluminum alloy bolts are take...

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Abstract

The invention discloses an electromagnetic pulse fast solution-aging process for an aluminum alloy component. The electromagnetic pulse fast solution-aging process comprises the following steps that S1, firstly, the aluminum alloy component or a blank is put in a pulsed electric field, electrified and heated to solution temperature or above, thus the second phase of the aluminum alloy component orthe blank is dissolved fast, then the aluminum alloy component or the blank is cooled rapidly to indoor temperature with the rate larger than or equal to 80 DEG C / s, and supersaturated solid solutionis formed; and S2, the aluminum alloy component or the blank obtained after solution treatment is put in a pulsed magnet field, magnetic pulse fast aging treatment is conducted, aging treatment timeis 1-12 h, solute atoms obtained after solution treatment are nucleated and precipitated from a substrate, and a precipitated phase in dispersed distribution is formed. Fast solution-fast aging treatment can be conducted, thus comprehensive performance of the aluminum alloy component is promoted, and the purposes of energy saving and environmental protection are achieved.

Description

technical field [0001] The invention relates to a technology for strengthening the structure and performance of aluminum alloy components, in particular to an electromagnetic pulse rapid solid solution-aging process for lightweight aluminum alloy components. Background technique [0002] Lightweight is a major national scientific and technological demand, and it is also an important development direction of aerospace, ships, automobiles and other transportation tools. The application of aluminum alloy components is one of the main methods to achieve lightweight. [0003] Generally, after the aluminum alloy components are formed, artificial aging is required to increase the strength and improve the comprehensive performance. At present, the forming process of aluminum alloy components takes only a few minutes, while the aging treatment takes several hours or even more than ten hours. The time gap between the forming and aging processes is too large, and the two cannot be car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 宋燕利郝泽宇华林王中奇
Owner WUHAN UNIV OF TECH
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