A kind of 3D printing cobalt-chromium alloy for dental porcelain restoration and preparation method thereof

A 3D printing, cobalt-chromium alloy technology, applied in the direction of dentures, additive manufacturing, additive processing, etc., can solve the problems of low elongation, high strength and hardness, and poor mechanical properties of restorations, and achieve the benefits of metal porcelain Combination, low cost, effect of reducing surface active energy
CN112159907BActive Publication Date: 2021-09-07CHENGDU KENINGDA MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU KENINGDA MATERIALS
Publication Date
2021-09-07

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Abstract

The invention provides a 3D printed cobalt-chromium alloy for dental porcelain restoration and a preparation method thereof, belonging to the field of dental porcelain restoration. The present invention adds Ta element, reduces thermal expansion coefficient, improves metal-ceramic bonding strength, reduces surface active energy, causes solid solution strengthening, improves strength; increases Cr element content, reduces Co element content, increases hcp phase content, is beneficial to metal-ceramic bonding, After the Co element is reduced, the combination of Cr-W, Cr-Mo, Cr-Si, W-Mo is improved, and the strength of the alloy is improved; the vacuum stress relief annealing is used to completely eliminate the residual stress, so that the cobalt-chromium restoration will not be used during service. The microstructure phase transformation will be caused by the residual stress, causing the formation of microcracks at the metal-ceramic bonding interface; solid solution and aging are used to adjust the phase composition of the cobalt-chromium alloy and the precipitation of the second phase, so that the alloy has good mechanical properties, and at the same time The hcp phase is further improved to improve the bonding strength of gold and porcelain.
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Description

technical field

[0001] The invention relates to the technical field of dental porcelain restoration, in particular to a 3D printed cobalt-chromium alloy for dental porcelain restoration and a preparation method thereof. Background technique

[0002] 3D printing is a technology based on digital model files, using bondable materials such as powdered metal or plastic, to construct objects by layer-by-layer printing. It has rapid prototyping, short processing cycle, easy processing of personalized objects and Due to the characteristics of complex shape objects, it is especially suitable for the production of dental crowns and bridges in the field of dental porcelain restoration. In order to ensure the quality of 3D printing, 3D printing powder materials require: high purity, low oxygen content, good fluidity; high particle shape sphericity, fine particle size, and narrow distribution. For dental 3D printing alloy powder, it should also have good metal-ceramic bonding force, cor...

Claims

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