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Selective laser melting TC4 alloy-based composite material as well as preparation method and application thereof

A technology of selective laser melting and composite materials, which is applied in metal material coating technology, additive processing, pharmaceutical formulations, etc. Improve physical and chemical bonding, improve surface quality, and promote the effect of chemical bonding

Pending Publication Date: 2022-08-09
CHENGDU KENINGDA MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, selective melting of TC4 alloy has become one of the main ways to repair tooth and dentition defects at home and abroad, but it is prone to porcelain chipping and porcelain peeling in actual clinical application, which seriously limits its application in the field of oral restoration. further application of
This is mainly because there may be holes and other defects on the surface of the selective laser melting TC4 alloy, which will introduce some inclusions, which will generate gas during the subsequent porcelain firing, resulting in porcelain chipping and cracking
At the same time, the wettability of ceramics at the interface of TC4 alloy is poor, and the chemical bonding force is low, which will also reduce the bonding strength of gold and porcelain

Method used

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  • Selective laser melting TC4 alloy-based composite material as well as preparation method and application thereof
  • Selective laser melting TC4 alloy-based composite material as well as preparation method and application thereof
  • Selective laser melting TC4 alloy-based composite material as well as preparation method and application thereof

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preparation example Construction

[0023] The invention provides a preparation method for selective laser melting of TC4 alloy matrix composite material, comprising the following steps:

[0024] (1) Corrosion treatment of selective laser melting of TC4 alloy with acid solution to obtain surface corrosion alloy;

[0025] (2) Coating treatment is performed on the surface of the surface corrosion alloy obtained in the step (1) to obtain a selective laser melting TC4 alloy-based composite material with a nickel-chromium-molybdenum alloy coating on the surface.

[0026] In the invention, the acid solution is used to perform corrosion treatment on the selective laser melting of the TC4 alloy to obtain a surface corrosion alloy. The invention performs corrosion treatment on the selective laser melting of the TC4 alloy, which can remove the inclusions and stress layers on the surface thereof, which is beneficial to the subsequent coating treatment.

[0027] In the present invention, the chemical composition of the sel...

Embodiment 1

[0049] A preparation method for selective laser melting of TC4 alloy-based composite materials, comprising the following steps:

[0050] (1) The selective laser melting TC4 alloy was placed in a mixed solution of hydrochloric acid and hydrofluoric acid, and the corrosion treatment was carried out at 30 °C for 1 min, and the surface corrosion alloy was obtained after washing with water and ethanol; wherein, the selective laser melting of the TC4 alloy The preparation method is as follows: TC4 alloy powder (in terms of mass percentage: Al 5%, V 3%, Fe<0.25%, and the remainder is Ti) is printed with a selective laser melting device (metal 3D printer) to prepare a metal block, Using the method of mechanical cutting, it is prepared into a 25×3×0.5mm sheet; the concentration of hydrochloric acid in the mixed solution is 5wt.%, and the concentration of hydrofluoric acid is 1wt.%;

[0051] (2) Coating treatment is performed on the surface of the surface corrosion alloy obtained in the...

Embodiment 2

[0065] A preparation method for selective laser melting of TC4 alloy-based composite materials, comprising the following steps:

[0066] (1) The selective laser melting TC4 alloy was placed in a mixed solution of hydrochloric acid and hydrofluoric acid, and the corrosion treatment was carried out at 25 ° C for 2 minutes, and the surface corrosion alloy was obtained after washing with water and ethanol; wherein, the selective laser melting of the TC4 alloy was The preparation method is as follows: TC4 alloy powder (calculated by mass percentage: Al 7%, V 5%, Fe<0.25%, and the balance is Ti) is printed with a selective laser melting device (metal 3D printer) to prepare a metal block, Using the method of mechanical cutting, it is prepared into a 25×3×0.5mm sheet; the concentration of hydrochloric acid in the mixed solution is 10wt.%, and the concentration of hydrofluoric acid is 2wt.%;

[0067] (2) Coating treatment is performed on the surface of the surface corrosion alloy obtai...

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Abstract

The invention provides a preparation method of a selective laser melting TC4 alloy-based composite material, which comprises the following steps: carrying out corrosion treatment on a selective laser melting TC4 alloy by adopting an acid solution to obtain a surface corrosion alloy; and film coating treatment is conducted on the surface of the surface corrosion alloy, and the selective laser melting TC4 alloy-based composite material with the nickel-chromium-molybdenum alloy coating on the surface is obtained. The selective laser melting TC4 alloy is subjected to corrosion treatment firstly, inclusions and a stress layer on the surface of the selective laser melting TC4 alloy can be removed, then surface coating treatment is carried out, the selective laser melting TC4 alloy-based composite material with the nickel-chromium-molybdenum alloy coating on the surface is obtained, nickel and chromium elements in the alloy coating have large affinity to oxygen, and therefore the surface of the selective laser melting TC4 alloy-based composite material is not prone to oxidation. The property of an endogenous oxidation film is remarkably improved, and chemical bonding of TC4 alloy and ceramic is promoted; and the molybdenum element is used as a surfactant, so that the surface quality of the plating layer is improved, and the physical and chemical binding force of the TC4 alloy and the ceramic is further improved.

Description

technical field [0001] The invention belongs to the technical field of biological alloys, and in particular relates to a selective laser melting TC4 alloy matrix composite material and a preparation method and application thereof. Background technique [0002] TC4 alloy (Ti-6Al-4V) has very good biocompatibility, and has good comprehensive mechanical properties such as low elastic modulus, high yield strength and high specific strength, and does not contain cadmium and beryllium elements that are harmful to human body. It is widely used in the field of dental restoration, such as dental brackets, restorations, porcelain crowns and bridges, etc. CNC cutting is usually used to process TC4 alloy restorations. However, due to the poor thermal conductivity of TC4 alloy, the heat during cutting seriously damages the tool, which increases the processing cost. At the same time, the raw material waste of CNC cutting technology is large, which further increases the production cost. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/26C23C14/02C23C14/16C23C14/35C22C19/05C22C14/00A61K6/829B33Y40/20B33Y70/00
CPCC23F1/26C23C14/021C23C14/35C23C14/165C22C19/055C22C14/00A61K6/829B33Y40/20B33Y70/00Y02P10/25
Inventor 李宁颜家振董鑫张幖李锐张玉鲜刘楠樊星云
Owner CHENGDU KENINGDA MATERIALS
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