Three-dimensional (3D) printing and manufacturing method of porous niobium parts

A manufacturing method and 3D printing technology, applied in manufacturing tools, ceramic molding machines, etc., can solve the problems of niobium powder smelting pollution and high cost, and achieve the effects of low cost, avoiding environmental pollution, and simple process

Active Publication Date: 2015-04-01
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

[0008] Aiming at the disadvantages of simple shape, pollution of niobium powder smelting and high cost in the traditional powder metallurgy manufacturing method of porous niobium parts, the present inventio

Method used

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Experimental program
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Effect test

Embodiment 1

[0021] (1) For the manufacture of pure niobium porous metal parts, niobium oxide powder with an average particle size of 20 μm is used as a raw material, mixed with epoxy resin powder with an average particle size of 20 μm, wherein the mass fraction of epoxy resin powder is 10%, and ball milling is mixed for 5 hours. Prepare niobium oxide / epoxy resin composite powder suitable for SLS forming; use 3D modeling software to design the 3D CAD model of the part, then process it with slicing software and save it as an STL file, and transfer the data information of the STL file to SLS Rapid prototyping equipment; spread a layer of niobium oxide composite powder with a thickness of about 0.1mm and a particle size of 20μm on the metal substrate for the powder feeding mechanism. Using CO with laser power equal to 50W 2 The laser scans the niobium oxide / epoxy resin composite powder in the slicing area, so that this layer is firmly combined with the previous layer; the single-layer manufac...

Embodiment 2

[0025] (1) For the manufacture of Nb-20Ta alloy porous parts, niobium oxide and tantalum oxide powder with an average particle size of 10 μm are used as raw materials. Oxygen resin powder, wherein the mass fraction of epoxy resin powder is 10%, ball milling and mixing for 5 hours to prepare Nb-20Ta / epoxy resin composite powder suitable for SLS forming; use three-dimensional modeling software to design the three-dimensional CAD model of the workpiece, and then After being processed by slicing software, it is saved as an STL file, and the data information of the STL file is sent to the SLS rapid prototyping equipment; a layer of oxide compound with a thickness of about 0.05mm and a particle size of 10μm is tiled on the metal substrate by the powder feeding mechanism. mineral powder. CO with laser power 50W 2 The laser scans the Nb-20Ta / epoxy resin composite powder in the slicing area, so that this layer is firmly combined with the previous layer; the single-layer manufacturing ...

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Abstract

The invention discloses a three-dimensional (3D) printing and manufacturing method of porous niobium oxide parts. The method comprises the steps of carrying out selective laser sintering (SLS) on niobium oxide powder to form niobium oxide parts of complicate shapes; carrying out molten salt electrolysis and deoxidization by taking the oxide parts as cathodes, restoring the niobium oxide parts to niobium parts, and keeping the primary shapes, so as to obtain the porous niobium parts of complicate shapes and realize the integrated manufacturing 'metallurgy-material-device'. According to the 3D printing and manufacturing method provided by the invention, the porous niobium parts of complicate shapes can be manufactured by providing the cheap niobium oxide parts without any mould; furthermore, the 3D printing and manufacturing method has the advantages of being simple and feasible in technological process, complicate in shape, low in cost, and green to manufacture.

Description

technical field [0001] The invention belongs to the field of composite forming of 3D printing technology and molten salt electrolysis, and specifically relates to a low-cost manufacturing method of porous niobium and alloy parts with complex shapes. Background technique [0002] Porous material is a material composed of niobium skeleton and pores. Compared with dense materials, porous materials are typically characterized by a large number of pores inside. Therefore, porous niobium has the following excellent properties, such as small density, large specific surface area, low thermal conductivity, high heat dissipation capacity, strong permeability, strong energy absorption and sound absorption, and good biocompatibility. In recent years, porous material parts have been widely used, such as biomaterial medical devices, shock absorbers, buffers, filters, energy absorbers, fluid permeators, heat exchangers, fire extinguishers, engines Exhaust muffler, etc. [0003] Traditio...

Claims

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Application Information

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IPC IPC(8): B28B1/00C25C3/34
CPCB28B1/001C25C3/34
Inventor 李瑞迪袁铁锤刘晓军范文博周立波
Owner CENT SOUTH UNIV
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