Powder metallurgical aluminum base material and manufacturing method thereof
An aluminum-based material and powder metallurgy technology, applied in the field of powder metallurgy, can solve problems such as sintering deformation and hinder mass production, achieve low cost, avoid sintering deformation, and solve the effects of sintering deformation
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Embodiment 1
[0030] In this embodiment, taking the pure aluminum matrix as an example, the preparation method of the powder metallurgy aluminum-based material is described, which specifically includes the following steps:
[0031] (1) Powder mixing: the aluminum elemental powder with an average particle size of 90 μm and the magnesium hydride powder with an average particle size of 45 μm are uniformly ground and mixed with a mortar to obtain a raw material powder, wherein the mass fraction of the magnesium hydride powder in the raw material powder is 0.001 %, the balance is aluminum elemental powder. The magnesium hydride powder used in this step can preferably have a purity of 98%.
[0032] (2) Forming: The powder obtained in step (1) is subjected to compression molding, the pressing pressure is 150 MPa, and the holding time is 15 s.
[0033] (3) Sintering: tube furnace is used for sintering, and the sintering protective atmosphere is high-purity N 2 , the sintering temperature is 650°C...
Embodiment 2
[0036] In this embodiment, taking the 2014 aluminum alloy substrate as an example, the preparation method of the powder metallurgy aluminum-based material is described, which specifically includes the following steps:
[0037] (1) Powder mixing: the 2014 aluminum alloy powder with an average particle size of 78 μm and the magnesium hydride powder with an average particle size of 10 μm are mixed to obtain a raw material powder, and the raw material powder is ball milled on a planetary ball mill with a rotation speed of 95 r / min for 8 hours and mixed evenly. The mass fraction of the magnesium hydride powder in the raw material powder is 0.51%, and the balance is 2014 aluminum alloy powder. The magnesium hydride powder used in this step preferably has a purity of 95%.
[0038] (2) Forming: Utilize a V-shaped mixer to mix into the powder obtained in step (1) and account for 0.5wt% zinc stearate as a lubricant as a lubricant in the powder obtained in step (1), after mixing evenly, ...
Embodiment 3
[0043] In this embodiment, taking the 7039 aluminum alloy substrate as an example, the preparation method of the powder metallurgy aluminum-based material is described, which specifically includes the following steps:
[0044](1) Powder mixing: the 7039 aluminum alloy powder with an average particle size of 45 μm and the magnesium hydride powder with an average particle size of 16 μm are mixed to obtain a raw material powder, and the raw material powder is ball milled on a planetary ball mill with a rotating speed of 50 r / min for 10 h and mixed evenly. The mass fraction of the magnesium hydride powder in the raw material powder is 3%, and the balance is 7039 aluminum alloy powder. The magnesium hydride powder used in this step can preferably have a purity of 90%.
[0045] (2) Forming: use a spiral mixer to mix zinc stearate that accounts for 0.8% of the mass fraction of the raw material powder into the powder obtained in step (1) as a lubricant, and after mixing evenly, the po...
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Abstract
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