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Method for synthesizing Al-Cu alloy in situ by powder metallurgy

A powder metallurgy in-situ, al-cu technology, applied in coating and other directions, can solve problems such as long-term ball milling, and achieve the effect of excellent tensile properties

Inactive Publication Date: 2014-11-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can effectively overcome the problems that the casting method is prone to component segregation and the introduction of impurities, and the powder metallurgy method requires a long time for ball milling.

Method used

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  • Method for synthesizing Al-Cu alloy in situ by powder metallurgy
  • Method for synthesizing Al-Cu alloy in situ by powder metallurgy
  • Method for synthesizing Al-Cu alloy in situ by powder metallurgy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Mix 1.26g of copper acetate monohydrate with 9.6g of aluminum powder, add it to 120ml of absolute ethanol, evaporate to dryness with magnetic stirring at 65°C, and place it in the air for 1 day to obtain a precursor powder. Take 10g of the precursor powder prepared by the above process and place it in the constant temperature zone of the tube furnace, raise the temperature to 300°C under the protection of argon, feed argon at a flow rate of 200ml / min for 1 hour, then turn off the argon, and use 200ml The flow rate of / min was fed with hydrogen for another hour, then the hydrogen was turned off, and the furnace was cooled to room temperature under the protection of argon to obtain Al-Cu powder with a Cu content of 4wt.%. Prepare 3 times in this way. Take 20g of the Al-Cu powder prepared by the above process, add 200g of steel balls, put it into a ball mill tank, vacuumize it, fill it with argon gas, and ball mill it at 400 rpm for 1 hour. The powder obtained by ball mil...

Embodiment 2

[0025] The specific method and steps are the same as in Example 1, except that the ball milling process is omitted. The tensile strength of the obtained material is (260~270) MPa, and the elongation at break is (16.9~17.6)%.

Embodiment 3

[0027] Concrete method and step are with embodiment 1, and difference is: sintering temperature becomes 570 ℃ by 600 ℃. The tensile strength of the prepared material is (262~268) MPa, and the elongation at break is (7.0~8.8)%.

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Abstract

The invention discloses a method for synthesizing Al-Cu alloy in situ by powder metallurgy. The method comprises the following steps: firstly, obtaining a microscopic structure that copper nanoparticles are uniformly deposited on aluminum powder by an impregnation method, performing ball-milling for a relatively short time, uniformly dispersing copper and embedding dispersed copper into the aluminum powder; secondly, densifying the powder by a cold-pressing sintering or vacuum hot-pressing method to obtain a block material; finally, performing hot extrusion forming to obtain the Al-Cu alloy material. The method has the advantages that the Al-Cu alloy material is prepared by the method, and the mechanical property of the alloy material is superior to that of other powder metallurgy aluminum alloy material. Meanwhile, the method also can be popularized and applied to other metal powder so as to prepare different matrix alloy materials. Therefore, the method has a wide industrial application prospect.

Description

[0001] technical field [0002] The invention relates to a method for in-situ synthesis of Al-Cu alloy by powder metallurgy, which belongs to the technical field of non-ferrous metal materials and powder metallurgy. Background technique [0003] As a heat-treatable alloy, Al-Cu alloy has many advantages such as low density, high strength, high elongation and good corrosion resistance, and is widely used in many fields such as automobiles, construction and aerospace. At present, the preparation of Al-Cu alloys mainly uses the casting method, but this method has many disadvantages: 1) It is difficult to ensure the uniformity of the structure and composition, and it is easy to segregate the composition, thereby affecting the performance; 2) It is easy to introduce iron and oxygen during the preparation process. 3) The cost of casting equipment is high and the energy consumption is huge. Relatively speaking, the powder metallurgy method can not only overcome the above shortcomi...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C21/12B22F1/02
Inventor 师春生孟鑫赵乃勤刘恩佐何春年
Owner TIANJIN UNIV
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