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Powder metallurgy aluminum-based 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 effects of avoiding sintering deformation, low cost, and reducing mutual influence

Active Publication Date: 2019-08-30
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the characteristics of aluminum alloy liquid phase sintering lead to serious sintering deformation. At present, mold design is commonly used in the field of powder metallurgy to solve the problem of sintering deformation; however, the sintering deformation of aluminum alloy has inhomogeneity and randomness, which is difficult to eliminate through mold design.
Sintering deformation is one of the key technical problems of powder metallurgy aluminum-based materials, which seriously hinders its mass production

Method used

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  • Powder metallurgy aluminum-based material and preparation method thereof
  • Powder metallurgy aluminum-based material and preparation method thereof
  • Powder metallurgy aluminum-based material and preparation method thereof

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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 zirconium 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 zirconium hydride powder in the raw material powder is 0.02 %, the balance is aluminum elemental powder. The zirconium hydride powder used in this step may preferably have a purity of 99.9%, wherein the mass ratio of hydrogen element to zirconium element is 2.

[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 protect...

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 zirconium 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 170 r / min for 9 hours and mixed evenly. The mass fraction of the zirconium hydride powder in the raw material powder is 8.5%, and the balance is 2014 aluminum alloy powder. The preferred purity of the zirconium hydride powder used in this step is 99.0%, wherein the mass ratio of hydrogen element to zirconium element is 1.5.

[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 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: the 7039 aluminum alloy powder with an average particle size of 45 μm and the zirconium 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 150 r / min for 16 hours and mixed evenly. The mass fraction of the zirconium hydride powder in the raw material powder is 15%, and the balance is 7039 aluminum alloy powder. The zirconium hydride powder used in this step may preferably have a purity of 99%, wherein the mass ratio of hydrogen element to zirconium element is 1.4.

[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 th...

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Abstract

The invention relates to a powder metallurgy aluminum-based material. The powder metallurgy aluminum-based material is characterized in that raw material powder comprises the following components of,by mass, 0.01%-15% of zirconium hydride and the balance aluminum base body powder, wherein the aluminum base body powder is aluminum elementary substance powder or aluminum alloy powder or aluminum-based composite material powder. The invention further relates to a preparation method of the powder metallurgy aluminum-based material. The preparation method comprises the following steps of (a) performing powder mixing; (b) performing forming; (c) performing sintering; and (d) performing heat treatment. The powder metallurgy aluminum-based material is relatively small in sintering deformation amount; and the preparation method is simple in process, relatively high in production efficiency and suitable for mass production.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy aluminum-based material and a preparation method thereof. Background technique [0002] Aluminum alloy is a light material with low density and high specific strength. After aluminum alloy replaces iron-based and copper-based parts, it is beneficial to reduce self-weight, energy saving and emission reduction. Aluminum alloy is used in aerospace, automobile, machinery manufacturing, shipbuilding, and chemical industries. and other fields have been widely used. For example, beams of supersonic fighter jets, high-pressure cylinders, automotive cantilever components, engine blades, casings and cylinder liners, automotive engine and gearbox parts, etc. are widely used in aluminum alloy. However, many parts not only require light weight and good mechanical properties, such as hardness, strength, wear resistance, thermal expansion coefficient, high temperature mecha...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C21/00B22F3/10
CPCB22F3/001B22F3/1007B22F2998/10C22C1/0416C22C21/00B22F2009/043B22F3/02B22F3/1021B22F2003/248
Inventor 颜巍巍秦晓冬杨浩包崇玺
Owner NBTM NEW MATERIALS GRP
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