A method for preparing raw material powder for selective laser melting additive manufacturing of high-entropy alloys
A selective laser melting and high-entropy alloy technology, which is applied in the field of alloy materials, can solve problems such as the inability to obtain defect-free prints from single-substance mixed powder, differences in the melting point and boiling point of single-substance powder, and imperfect powder production systems, etc., to achieve good molding effects, Good density, lower production and R&D costs
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Embodiment 1
[0039] A FeCoCrNi system high-entropy alloy selective laser melting in-situ additive manufacturing method, comprising the following steps:
[0040] Step 1, the raw materials are mixed, and the purity is 99.9% 560gFe, 590gCo elemental metal spherical powder (powder particle diameter 15~48 microns) and 1110gNi 50 Cr 50 Alloy spherical powder (powder particle size 15-48 microns) is placed in a three-dimensional mixer and mixed for 4 hours, the cylinder speed is 20r / min, and the uniformly mixed spherical powder is dried in a vacuum dryer for 10 hours at a temperature of 50 degrees Celsius , the vacuum degree is less than the absolute pressure of 10KPa, and it is sealed and stored after drying.
[0041] Step 2, additive preparation, the substrate is made of 316L stainless steel, the size is 250×250×15mm, the surface of the substrate is polished with an angle grinder until there is no oxide, and the oil and dirt on the surface are cleaned with acetone and alcohol respectively. Use...
Embodiment 2
[0053] A FeCoCrNi system high-entropy alloy selective laser melting in-situ additive manufacturing method, comprising the following steps:
[0054] Step 1, the raw materials are mixed, and the purity is 99.9% 560gFe, 590gCo, 442.5gNi elemental metal spherical powder (powder particle size 15-48 microns) and 667.5gNi 20 Cr 80 Alloy spherical powder (powder particle size 15-48 microns) is placed in a three-dimensional mixer and mixed for 2 hours, the cylinder speed is 40r / min, and the uniformly mixed spherical powder is dried in a vacuum dryer for 5 hours at a temperature of 100 degrees Celsius , the vacuum degree is less than the absolute pressure of 10KPa, and it is sealed and stored after drying.
[0055] Step 2, additive preparation, the substrate is made of 316L stainless steel, the size is 250×250×15mm, the surface of the substrate is polished with an angle grinder until there is no oxide, and the oil and dirt on the surface are cleaned with acetone and alcohol respectivel...
Embodiment 3
[0057] A FeCoCrNi system high-entropy alloy selective laser melting in-situ additive manufacturing method, comprising the following steps:
[0058] Step 1, the raw materials are mixed, and the purity is 99.9% 560gFe, 590gCo, 337.1gNi elemental metal spherical powder (powder particle size 15-48 microns) and 772.9gNi 30 Cr 70 Alloy spherical powder (powder particle size 15-48 microns) is placed in a three-dimensional mixer and mixed for 3 hours, the cylinder speed is 30r / min, and the uniformly mixed spherical powder is dried in a vacuum dryer for 8 hours at a temperature of 80 degrees Celsius , the vacuum degree is less than the absolute pressure of 10KPa, and it is sealed and stored after drying.
[0059] Step 2, additive preparation, the substrate is made of 316L stainless steel, the size is 250×250×15mm, the surface of the substrate is polished with an angle grinder until there is no oxide, and the oil and dirt on the surface are cleaned with acetone and alcohol respectively...
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