Metal powder for 3D printing and metal powder surface nano-modification method
A metal powder, nano-modification technology, applied in the field of 3D printing, can solve the problems of poor fluidity, poor powder sphericity and high cost of satellite balls and powders, and achieve the effect of improving physical state, excellent fluidity and improving fluidity.
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Embodiment 1
[0036] Add the gas-atomized nickel-based alloy powder (particle size ≤ 150 μm) into the ball mill, then evacuate the ball mill to a vacuum degree of 0.01 Pa, and then feed argon gas into the ball mill to keep the air pressure in the ball mill at 1.0×10 5 Pa, heat to 220°C, keep warm for 2.5 hours, then cool naturally, put the cooled material into the classifying and screening machine, first remove the material with a particle size of less than 15 μm, and then screen out the material with a particle size of less than 53 μm, that is, the particle size is 15 to 53 μm Nano-modified nickel-based alloy powder.
[0037] Test the electron micrograph of the finished product obtained in this embodiment, the results are as follows figure 1 As shown, the impurity content, particle size distribution and fluidity of the nano-modified nickel-based alloy powder and the nickel-based alloy powder raw material after gas atomization treatment were tested, and the test results are shown in Table 1...
Embodiment 2
[0042] Put the cobalt-based alloy powder (particle size ≤ 150 μm) after gas atomization into the ball mill, then evacuate the ball mill to a vacuum degree of 0.008 Pa, and then feed argon gas into the ball mill to keep the air pressure in the ball mill at 1.1×10 5 Pa, heat to 250°C, keep warm for 3.0h, then cool naturally, put the cooled material into the classifying and screening machine, first remove the material with a particle size of less than 15 μm, and then screen out the material with a particle size of less than 53 μm, that is, the particle size is 15-53 μm nano-modified cobalt-based alloy powder.
[0043] Observation by electron microscope shows that the nano-modified cobalt-based alloy powder prepared in this embodiment is spherical or nearly spherical.
[0044] The impurity content, particle size distribution and fluidity of the nano-modified cobalt-based alloy powder and the raw material of the cobalt-based alloy powder after gas atomization treatment were tested,...
Embodiment 3
[0049] Add the gas-atomized mold steel alloy powder (particle size ≤ 150 μm) into the ball mill, then evacuate the ball mill to a vacuum degree of 0.009 Pa, and then feed argon gas into the ball mill to keep the air pressure in the ball mill at 1.0×10 5Pa, heat to 210°C, keep warm for 2.0h, then cool naturally, put the cooled material into the classifying and screening machine, first remove the material with a particle size of less than 15 μm, and then screen out the material with a particle size of less than 53 μm, that is, the particle size is 15-53 μm Nano-modified die steel alloy powder.
[0050] It can be seen from electron microscope observation that the nano-modified mold steel alloy powder prepared in this embodiment is spherical or nearly spherical.
[0051] The impurity content, particle size distribution and fluidity of the nano-modified die steel alloy powder and the raw material of the die steel alloy powder after gas atomization treatment were tested, and the tes...
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Abstract
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