A kind of powder metallurgy aluminum base material and preparation method thereof
An aluminum-based material and powder metallurgy technology, applied in the field of powder metallurgy, can solve problems such as hindering mass production and sintering deformation, and achieve the effect of simple addition, reducing sintering deformation, and avoiding 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 60 μm and the titanium 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 titanium hydride powder in the raw material powder is 0.01 %, the balance is aluminum elemental powder. The titanium hydride powder used in this step may preferably have a purity of 99.9%, wherein the mass ratio of titanium element to hydrogen element is 0.5.
[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 protectiv...
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 titanium 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 120 r / min for 4 hours and mixed evenly. The mass fraction of titanium hydride powder in the raw material powder is 1%, and the balance is 2014 aluminum alloy powder. The titanium hydride powder used in this step preferably has a purity of 99.9%, wherein the ratio of titanium element to hydrogen element is 0.5.
[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 lubrican...
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: mix 7039 aluminum alloy powder with an average particle size of 45 μm and titanium hydride powder with an average particle size of 16 μm to obtain a raw material powder, and the raw material powder is ball milled on a planetary ball mill with a rotational speed of 185 r / min for 4.5 hours and mixed evenly , wherein the mass fraction of titanium hydride powder in the raw material powder is 1.5%, and the balance is 7039 aluminum alloy powder. The titanium hydride powder used in this step may preferably have a purity of 95%, wherein the mass ratio of titanium element to hydrogen element is 2.
[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 ...
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Abstract
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