Method for preparing high-performance aluminum alloy by using powder injection molding technology

Method for preparing high-performance aluminum alloy by using powder injection molding technology

  • CN 107,790,729 B
  • Filed: 11/23/2017
  • Issued: 08/03/2021
  • Est. Priority Date: 11/23/2017
  • Status: Active Grant
First Claim
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1. A method for preparing high-performance aluminum alloy by using powder injection molding technology is characterized by comprising the following steps:

  • based on an Al-Cu-Mg-Si alloy system, the alloy contains a small amount of alloy element Sn;

    the raw material powder adopts pure Al powder, Cu powder, Sn powder, Al-50Mg and Al-12Si powder;

    placing the raw material powder and the wax-based binder on a roller type mixing mill for mixing to obtain a feed, preparing a green blank by an injection molding technology, degreasing by a solvent, and performing a thermal degreasing-sintering integrated step under a high-purity nitrogen atmosphere to obtain a high-density injection-molded aluminum alloy product;

    the particle size of the raw material powder is as follows;

    al;

    10-40 μ

    m, Cu <

    5 μ

    m, Sn <

    5 μ

    m simple substance powder, Al-50Mg <

    5 μ

    m, Al-12Si <

    5 μ

    m;

    the injection-molded aluminum alloy product comprises the following alloy elements in percentage by mass;

    3-6% of Cu, 78-3% of Mg1, 0.2-2.0% of Si, 0.1-2.0% of Sn and the balance of Al;

    the wax-based binder comprises the following components in percentage by mass;

    20-30% of paraffin, 20-30% of beeswax, 20-30% of polyethylene wax, 10-30% of low-density polyethylene and 3-10% of stearic acid.

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