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Preparation method of nanometer precipitated phase reinforced Al-Er alloy

A nano-precipitated phase and al-er technology, applied in the field of metal alloys, can solve the disputes and differences in the form of trace elements and the mechanism of action, and achieve the effects of increasing tensile strength, increasing solid solubility, and improving mechanical properties

Inactive Publication Date: 2012-01-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, although a lot of exploration has been carried out in this area and important progress has been made, there are still great controversies and differences in the form and mechanism of action of trace elements in aluminum alloys.

Method used

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  • Preparation method of nanometer precipitated phase reinforced Al-Er alloy
  • Preparation method of nanometer precipitated phase reinforced Al-Er alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add rare earth element Er to industrial pure aluminum melt, wherein the weight percentage of rare earth element Er to the final product is 0.03%, then the above melt is rapidly cooled and solidified, and then subjected to high-energy ultrasonic vibration treatment at 630°C for 24 hours, pouring and sampling , and then carry out isothermal aging treatment at 200°C for 8 hours.

Embodiment 2

[0014] Add rare earth element Er to industrial pure aluminum melt, wherein the weight percentage of rare earth element Er to the final product is 0.03%, then the above melt is rapidly cooled and solidified, and then subjected to electromagnetic stirring treatment at 640 ° C for 48 hours, pouring and sampling, Then carry out isothermal aging treatment at 250°C for 4 hours.

Embodiment 3

[0016] Add rare earth element Er to industrial pure aluminum melt, wherein the weight percentage of rare earth element Er to the final product is 0.45%, then the above melt is rapidly cooled and solidified, and then subjected to high-energy ultrasonic vibration treatment at 640°C for 12h, pouring and sampling , and then carry out isothermal aging treatment at 300°C for 6 hours.

[0017] However, the rare earth element Er treated by the example process is fully dissolved in pure aluminum and fully reacts with Al in the eutectic reaction temperature range, and nano-scale Al is precipitated after isothermal aging treatment. 3 Second phase. Thanks Al 3 The Er phase can have better interfacial coherence with the matrix, which is very beneficial to improving the mechanical properties of the alloy, and can significantly improve the mechanical properties of the alloy. from figure 1 It can be seen that the tensile strength of pure aluminum is only 75MPa, while the tensile strength o...

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Abstract

A preparation method of nanometer precipitated phase reinforced Al-Er alloy is characterized in that the method comprises the following steps: firstly adding rare earth element Er in industrial pure aluminum melt, wherein the rare earth element Er accounts for 0.02-00.5% of the weight of the final product, rapidly cooling and solidifying the melt, performing high-energy ultrasonic vibration or electromagnetic stirring treatment within a temperature range of 630-640 DEG C for 12-48 hours, casting and sampling, and performing isothermal aging treatment at 150-400 DEG C for 1-8 hours. The Al-Er alloy treated by the invention can precipitate a nanometer Al3Er reinforced phase in the substrate Al and at the crystal boundary, and the tensile strength of the obtained Al-Er alloy is increased by about 25% when compared with the tensile strength of pure aluminium.

Description

technical field [0001] The invention belongs to the technical field of metal alloys. Background technique [0002] The development of high and new technologies such as aviation and aerospace has put forward higher and higher requirements for the performance of aluminum alloys. Aluminum alloys are developing in the direction of high specific strength, high specific modulus, high damage tolerance, heat resistance, and corrosion resistance. Alloying has always been an important means to tap the potential of alloys, improve the properties of alloys and further develop new aluminum alloys, and has become a hot spot in the material industry at home and abroad. In recent years, although a lot of exploration has been carried out in this area and important progress has been made, there are still great controversies and differences in the form and mechanism of action of trace elements in aluminum alloys. Continuing to carry out research in this area, continuously accumulating relevan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 胡志闫洪胡小武
Owner NANCHANG UNIV