Manufacturing method of nanometer low-porosity porous aluminum alloy
An aluminum alloy and porosity technology, which is applied in the field of preparing a micron-scale low-porosity porous aluminum alloy by sintering and dissolution method, can solve the problems that cannot meet the requirements of porosity and pore size, and achieve cost saving, flexible operation, and preparation The effect of simple process
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Embodiment 1
[0049]The matrix powder selected is 2A12 aluminum alloy powder. First, the water-soluble pore former powder with a particle size distribution of 15-40 μm and the 2A12 aluminum alloy powder with a particle size distribution of 10-20 μm were dried in a drying oven at 80° C. for 5 hours. Mix 2A12 powder and water-soluble pore-forming agent powder according to the volume fraction of 7:3 (that is, the value of A is 30), and then mix them in a three-dimensional mixer for 3 hours, and the speed of the mixer is 20r / min. Take it out and save it for later use. Put the composite powder in the mold to form the prefabricated body at 200MPa, hold the pressure for 20s, and prepare the prefabricated body. The prefabricated green body is subjected to 600° C. in a vacuum sintering furnace for a holding time of 180 minutes to prepare a sintered body. The porous aluminum alloy was prepared by removing the pore-forming agent from the sintered body prepared by the powder metallurgy technology by ...
Embodiment 2
[0051] The matrix powder selected is 2A12 aluminum alloy powder. First, the water-soluble pore former powder with a particle size distribution of 15-40 μm and the 2A12 aluminum alloy powder with a particle size distribution of 10-20 μm were dried in a drying oven at 80° C. for 5 hours. The 2A12 powder and the water-soluble pore-forming agent powder are mixed according to the volume fraction of 13:7 (that is, the value of A is 35), and then mixed in a three-dimensional mixer for 3 hours, and the speed of the mixer is 20r / min, and then in a vacuum environment Take it out and save it for later use. Put the composite powder in the mold to form the prefabricated body at 200MPa, hold the pressure for 20s, and prepare the prefabricated body. The prefabricated green body is subjected to 600° C. in a vacuum sintering furnace for a holding time of 180 minutes to prepare a sintered body. The porous aluminum alloy was prepared by removing the pore-forming agent from the sintered body pr...
Embodiment 3
[0053] The matrix powder selected is 2A12 aluminum alloy powder. First, the water-soluble pore former powder with a particle size distribution of 15-40 μm and the 2A12 aluminum alloy powder with a particle size distribution of 10-20 μm were dried in a drying oven at 80° C. for 5 hours. Mix 2A12 powder and water-soluble pore-forming agent powder according to the volume ratio of 6:4 (that is, the value of A is 40), and then mix them in a three-dimensional mixer for 3 hours, and the speed of the mixer is 20r / min, and then under vacuum environment Take it out and save it for later use. Put the composite powder in the mold to form the prefabricated body at 200MPa, hold the pressure for 20s, and prepare the prefabricated body. The prefabricated green body is subjected to 600° C. in a vacuum sintering furnace for a holding time of 180 minutes to prepare a sintered body. The porous aluminum alloy was prepared by removing the pore-forming agent from the sintered body prepared by the ...
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Abstract
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