Method for in-situ preparation of copper-based shape memory alloy through additive manufacturing
A memory alloy, in-situ preparation technology, applied in additive manufacturing, additive processing, process efficiency improvement and other directions, can solve the problems of slow cooling speed, many gaps, poor mechanical properties, etc., to reduce the formation of pores and improve the weight. Melting zone, the effect of increasing the density
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[0040] Example 1
[0041] A method for preparing Cu-17Al-10Mn copper-based shape memory alloy of arbitrary shape by pre-alloying powder, including the following steps:
[0042] (1) Put the high-purity alloy of Cu and Al in the alloy into a vacuum melting furnace according to the mass ratio for smelting, and repeat the melting three times to obtain the original ingot. The ingot is melted in the vacuum melting furnace at high temperature while being passed into Argon gas impacts the melt. The melt is impacted and dispersed to form small droplets. After cooling, the required alloyed powder material is formed. The powder particle size is 19.5-46.7μm, and the average particle size is 30.5μm. The high-purity alloy powder of Mn element is mechanically mixed with the pre-alloyed powder obtained above according to the mass ratio to obtain a uniform powder;
[0043] (2) Using the prepared mixed powder as the raw material, using a continuous YAG laser as the energy source, the laser spot diame...
Example Embodiment
[0047] Example 2
[0048] A method for preparing Cu-17Al-10Mn copper-based shape memory alloy of arbitrary shape by pre-alloying powder, including the following steps:
[0049] (1) Put the high-purity alloy of Cu and Mn in the alloy into a vacuum melting furnace according to the mass ratio for smelting, and repeat the melting three times to obtain the original ingot. The ingot is melted in the vacuum melting furnace at high temperature while being passed into Argon gas impacts the melt. The melt is impacted and dispersed to form small droplets. After cooling, the required alloyed powder material is formed. The powder particle size is 16.3-57.5μm, and the average particle size is 31.2μm. The high-purity alloy powder of Al element is mechanically mixed with the pre-alloyed powder obtained above according to the mass ratio to obtain a uniform powder;
[0050] (2) Using the prepared mixed powder as the raw material, using continuous YAG laser as the energy source, the laser spot diamete...
Example Embodiment
[0054] Example 3
[0055] A method for preparing Cu-10.2Al-8.5Mn-0.3La copper-based shape memory alloy of any shape from pre-alloyed powder, including the following steps:
[0056] (1) Put the high-purity alloy of Cu and Al in the alloy into a vacuum melting furnace according to the mass ratio for smelting, and repeat the melting three times to obtain the original ingot. The ingot is melted in the vacuum melting furnace at high temperature while being passed into Argon gas impacts the melt. The melt is impacted and dispersed to form small droplets. After cooling, the required alloyed powder material is formed. The powder particle size is 8.63-50.2μm, and the average particle size is 26.4μm. The high-purity alloy powder of Mn and La elements is mechanically mixed with the pre-alloyed powder obtained above according to the mass ratio to obtain a uniform powder;
[0057] (2) The prepared mixed powder is used as the raw material, the high-energy electron beam is used as the energy sourc...
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