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Metal powder for additive manufacturing
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A metal powder and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems of deposition holes, poor fusion effect of titanium alloy metal powder, and reduced interface binding energy, etc., to achieve grain refinement, improve melting effect, The effect of reducing the interfacial binding energy
Active Publication Date: 2021-12-03
TSC LASER TECH DEV BEIJING CO LTD
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Problems solved by technology
[0004] In order to solve the problems of poor fusion effect of titanium alloy metal powder and deposition holes in the laser deposition additive manufacturing process of titanium alloy components in the prior art, a metal powder for additive manufacturing is provided.
[0006] Using the above technical scheme, the added active powder can act as a diluent to reduce the viscosity and surface tension of the melt, reduce the interfacial binding energy, improve the melting effect, solve the problem of poor fusion effect of titanium alloy metal powder, and also suppress deposition holes production
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Embodiment 1
[0040] The metal powder for additive manufacturing in this embodiment has the following components in parts by mass: 100 parts of titanium alloy metal powder (Ti60), 0.3 part of active powder (iron phosphorus powder).
[0041] Its laser deposition additive manufacturing method is as follows:
[0042] S1, mix Ti60 titanium alloy metal powder and ferrophosphorus active powder evenly to form a mixed powder, and dry it in a vacuum drying oven for 2 hours at a drying temperature of 100°C.
[0043] S2, in the TSC-S4510 equipment, under the argon protective atmosphere, on the pure titanium plate, adopt the coaxial powder feeding deposition method, and use the laser to perform laser scanning layer-by-layer deposition on the pure titanium plate.
[0044] The lapping method of laser scanning is negative lapping, and the scanning method is to scan positively in a serpentine shape and then backfill in a reverse serpentine pattern. The specific process parameters of laser scanning are as ...
Embodiment 2
[0047] The metal powder for additive manufacturing in this embodiment has the following components in parts by mass: 100 parts of titanium alloy metal powder (Ti65), 0.3 parts of active powder (iron phosphorus powder, B, Sr and Bi). The mass ratio of phosphorus iron powder, B, Sr and Bi in the active powder is 3:1:1:1.
[0048] Its laser deposition additive manufacturing method is the same as that of Example 1.
Embodiment 3
[0050] The metal powder for additive manufacturing in this embodiment has the following components in parts by mass: 100 parts of titanium alloy metal powder (Ti65), 0.3 parts of active powder (iron phosphorus powder, B, Sr and Bi). The mass ratio of phosphorus iron powder, B, Sr and Bi in the active powder is 2:2:1:1.
[0051] Its laser deposition additive manufacturing method is the same as that of Example 1.
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Abstract
The invention relates to the technical field of additive manufacturing, and discloses a metal powder for additive manufacturing. The metal powder includes titanium alloy metal powder and active powder, wherein the active powder accounts for 0.1 wt% to 0.1% by weight of the mass of the titanium alloy metal powder. 0.3wt%, the active powder is one or more of phosphorus iron powder, B, Sr and Bi, which can eliminate defects such as unfused, shrinkage cavity and shrinkage porosity in the laser deposition process of titanium alloy, and the manufactured titanium alloy The internal structure of the component is uniform and dense, and the strength is high.
Description
technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a metal powder for additive manufacturing. Background technique [0002] Laser Melt Deposition (LMD)) uses a high-power and high-brightness laser as the heat source, and the powder is fed synchronously. The powder to be melted is directly sent into the molten pool generated by the high-energy beam laser, and the machine tool Or the robot guides the high-energy beam laser to walk layer by layer according to the trajectory, and the layers are piled up to finally form three-dimensional metal parts. Laser deposition additive manufacturing can precisely control energy input, spot diameter (melt channel width), forming method, scanning path and layer thickness, and realize the forming and manufacturing of metal parts with arbitrary complex shapes. For thin-walled aerospace components with complex shapes that require lightweight, high efficiency, and high reliability, tr...
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