Al-Mg-Sc-Zr series aluminum alloy composition for selective laser melting technology and preparation method for molding part
A selective laser melting, aluminum alloy technology, applied in the direction of improving energy efficiency, additive processing, process efficiency, etc., can solve the problems of limited solid solution element content, low density, poor mechanical properties, etc., to reduce internal Holes, comprehensive performance improvement, and the effect of increasing formability
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Embodiment 1
[0035] 1. Composition and content of aluminum alloy composition:
[0036] Al 92.3 Mg 6 Mn 0.5 Sc 0.5 Zr 0.7
[0037] Second, the preparation steps of aluminum alloy forming parts:
[0038] (1) Master alloy melting:
[0039] After preheating the crucible to 520±5℃, place the pure aluminum in the crucible, and continue to heat up to 1100±5℃. After the pure aluminum is melted, press the Al-Zr master alloy into the pure aluminum, and stir for 30 minutes. After stirring evenly, reduce the melt temperature to 750±5°C, then add Mg, Mn and Al-Sc alloy, and stir for 30 minutes to obtain an alloy melt with uniform composition;
[0040] (2) Powder preparation:
[0041] After the alloy melt is melted uniformly, open the valve at the bottom of the crucible, the alloy melt flows out through an alumina conduit with an inner diameter of 5mm, and falls freely. The chemical pressure is 10MPa, and the powder of 15-60 microns is finally screened for use;
[0042] (3) Preparation of alum...
Embodiment 2
[0058] 1. Composition and content of aluminum alloy composition:
[0059] Al 86 Mg 10 Mn 1 Sc 2 Zr 1
[0060] Second, the preparation steps of aluminum alloy forming parts:
[0061] (1) Master alloy melting:
[0062] Same as step (1) in Example 1.
[0063] (2) Powder preparation:
[0064] With step (2) in embodiment 1.
[0065] (3) Preparation of aluminum alloy forming parts:
[0066] 1) Use CAD to establish a 3D model of the required forming parts and convert it into a divisible data format;
[0067] 2) Cut the three-dimensional model together with the support into multiple layers with a thickness of 0.04mm and import it into the SLM equipment;
[0068] 3) Spread a layer of 0.04mm metal powder on a removable substrate as described in step S2;
[0069] 4) Laser scanning step 3) The geometry of the cross section of the metal powder layer is 4 times, the laser spot during the scanning process is: 0.1mm, the laser power is: 360W, and the laser scanning rate is: 800mm / ...
Embodiment 3
[0081] 1. Composition and content of aluminum alloy composition:
[0082] Al 76 Mg 15 Mn 2 Sc 4 Zr 3
[0083] Second, the preparation steps of aluminum alloy forming parts:
[0084] (1) Master alloy melting:
[0085] Same as step (1) in Example 1.
[0086] (2) Powder preparation:
[0087] With step (2) in embodiment 1.
[0088] (3) Preparation of aluminum alloy forming parts:
[0089] 1) Use CAD to establish a 3D model of the required forming parts and convert it into a divisible data format;
[0090] 2) Cut the three-dimensional model together with the support into multiple layers with a thickness of 0.04mm and import it into the SLM equipment;
[0091] 3) Spread a layer of 0.04mm metal powder on a removable substrate as described in step S2;
[0092] 4) Laser scanning step 3) The geometry of the cross-section of the metal powder layer is 4 times. During the scanning process, the laser spot is: 0.1mm, the laser power is: 400W, and the laser scanning rate is: 800mm...
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