Near-net-shape method for porous metal part

A near-net-shaped, porous metal technology, applied in the field of rapid prototyping technology and powder loose sintering composite forming, can solve the problems of cumbersome process, affecting the dimensional accuracy of parts, difficult to directly form parts, etc. Variation, wide effect of molding material
CN101722306AActive Publication Date: 2010-06-09HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2010-06-09

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Abstract

The invention discloses a near-net-shape method for a porous metal part. The method comprises the following steps: (1) firstly, designing a three-dimensional CAD model of the part, saving the model as an STL file, and transmitting the file to SLM quick shape equipment; (2) introducing protective gas into the equipment after the equipment is vacuumized; (3) spreading a layer of metal powder with thickness of between 0.05 and 0.15millimeter and grain diameter of between 10 and 100 mu m on a metal substrate by a powder feeding mechanism; (4) scanning the outer profile of the boundary of a slice by adopting a laser beam of which the laser power is more than or equal to 100W to ensure that the profile is melted; (5) repeating the step (3) to (4) until shaping is completed; and (6) integrally placing a shell of the shaped part and powder loaded in the shell in a high temperature sintering furnace for sinter shaping. The method does not need a die, and has the characteristics of simple and easy technical process and complicated shape manufacture.
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Description

technical field

[0001] The invention belongs to the field of rapid prototyping technology and powder loose-pack sintering composite forming, and specifically relates to a method for near-net-shaping porous metal parts. Background technique

[0002] A porous material is a material composed of a metal skeleton and pores. Compared with dense materials, porous materials are typically characterized by a large number of pores inside. Therefore, porous metal has the following excellent properties, such as low 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 devices, shock absorbers, buffers, filters, energy absorbers, fluid permeators, heat exchangers, fire extinguishers, engine exhaust Mufflers, metal electrodes and more.

[0003] Loose Powder Sintering (LPS...

Claims

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