Laser selective area preparation method and implant of an enhanced porous tantalum implant

Abstract

The invention discloses a method for preparing an enhanced porous tantalum implant by laser selection and the implant. The method includes the following steps: in the process of laser selection melting and forming, under laser radiation, the spherical tantalum powder is melted, and the nano-tantalum hydride Due to the decomposition of hydrogen at high temperature, hydrogen explosion overflows under the action of high temperature and high pressure, forming the first-level porous structure on the surface of the formed tantalum; due to the gap formed between the SLM forming melting channel and the melting channel, a gap is formed between the current layer of melting channel and the next layer of melting channel. The included angle of 30-90 degrees forms the second-level porous structure; the spherical tantalum powder is melted and solidified to form the third-level and fourth-level porous structures customized by CAD design software. The above-mentioned four-level porous structure forms a multi-level porous tantalum implant that integrates macro and micro scales across multiple scales such as nano-scale, micro-nano scale, micro-scale, and millimeter scale. The present invention widens the extremely small forming ability of SLM by decomposing the augmented structure generated by hydrogen explosion overflow, and enhances the forming ability of laser selective melting to form porous tantalum.

Description

technical field [0001] The invention belongs to the technical field of manufacturing of augmented materials, and in particular relates to a laser selective preparation method of an enhanced porous tantalum implant and an implant. Background technique [0002] Laser selective melting molding technology is already a widely used and mature metal additive manufacturing technology. This technology uses the laser as the heat source, focuses the laser beam on the metal powder on the forming plane through the control of the precise optical scanning system, and moves the laser focus at high speed according to the predetermined path, so that the metal powder scanned on the forming plane melts rapidly After that, it is rapidly cooled and solidified, and three-dimensional solid metal structural parts are finally processed by scanning the cross-sectional area layer by layer and layer by layer stacking. Laser selective melting molding technology breaks through the limitation of tradition...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, to enhance the preparation method of porous tantalum implants by laser selection and implants, and to solve the problem that laser selective melting cannot form microstructures below 100 microns to match real bone trabecular structures , and the problem that the oxygen content of the powder will increase during long-term use

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