Ta-contained 3D printing cobalt chromium molybdenum alloy powder for dental department and preparation method thereof

A cobalt-chromium-molybdenum alloy, 3D printing technology, applied in the field of dental restoration, can solve the problems of reduced oxygen content and poor gold-ceramic bonding performance, and achieves the effect of reducing oxygen content, improving gold-ceramic bonding performance, and good purity

Active Publication Date: 2018-01-19
CHENGDU KENINGDA MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cobalt-chromium-molybdenum alloy has good biocompatibility, excellent mechanical properties and corrosion resistance. It is an alloy powder commonly used in existing dental 3D printing. It is used to make restorations such as crowns, bridges, and brackets ( See Chinese patent application CN106725944A, Chinese patent ZL 201410197534.8), but the metal-ceramic bonding performance of the existing cobalt-chromium-molybdenum alloy powder is poor, the oxygen content needs to be further reduced, and the thermal stability and fluidity need to be further improved

Method used

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  • Ta-contained 3D printing cobalt chromium molybdenum alloy powder for dental department and preparation method thereof
  • Ta-contained 3D printing cobalt chromium molybdenum alloy powder for dental department and preparation method thereof
  • Ta-contained 3D printing cobalt chromium molybdenum alloy powder for dental department and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this example, the chemical composition of the 3D printing cobalt-chromium-molybdenum alloy powder containing Ta for dental use and the weight percentages of each element are: Cr 26.0%, Mo 10.0%, Si 2.0%, Mn 1.5%, W 5.0%, Nb 1.0% , Ta 2.0%, the balance is Co. The processing steps of the preparation method are as follows:

[0054] (1) Master alloy smelting

[0055] According to the above chemical composition, the ingredients are added, and the raw materials are added to the vacuum induction furnace to be smelted into a cobalt-chromium-molybdenum master alloy liquid containing Ta. The vacuum degree in the furnace during the refining period should be higher than 1.0×10 -2 Pa, then pouring the Ta-containing cobalt-chromium-molybdenum master alloy liquid into a strip-shaped Ta-containing cobalt-chromium-molybdenum master alloy ingot of 20mm × 20mm × 100mm;

[0056] (2) Atomized powder making

[0057] The Ta-containing cobalt-chromium-molybdenum master alloy ingot obtain...

Embodiment 2

[0062] In this example, the chemical composition and the weight percentage of each element of the 3D printing cobalt-chromium-molybdenum alloy powder containing Ta for dental use are: Cr 30.0%, Mo 8.0%, Si 2.0%, W 3.0%, Nb 1.0%, Ta 0.5% , and the balance is Co. The processing steps of the preparation method are as follows:

[0063] (1) Master alloy smelting

[0064] According to the above chemical composition, the ingredients are added, and the raw materials are added to the vacuum induction furnace to be smelted into a cobalt-chromium-molybdenum master alloy liquid containing Ta. The vacuum degree in the furnace during the refining period should be higher than 1.0×10 -2 Pa, then pouring the Ta-containing cobalt-chromium-molybdenum master alloy liquid into a strip-shaped Ta-containing cobalt-chromium-molybdenum master alloy ingot of 20mm × 20mm × 100mm;

[0065] (2) Atomized powder making

[0066] The Ta-containing cobalt-chromium-molybdenum master alloy ingot obtained in s...

Embodiment 3

[0071]In this example, the chemical composition and the weight percentage of each element of the 3D printing cobalt-chromium-molybdenum alloy powder containing Ta for dental use are: Cr 27.0%, Mo 10.0%, Mn 1.0%, W 8.0%, Nb 0.5%, Ta 5.0% , and the balance is Co. The processing steps of the preparation method are as follows:

[0072] (1) Master alloy smelting

[0073] According to the above chemical composition, the ingredients are added, and the raw materials are added to the vacuum induction furnace to be smelted into a cobalt-chromium-molybdenum master alloy liquid containing Ta. The vacuum degree in the furnace during the refining period should be higher than 1.0×10 -2 Pa, then pouring the Ta-containing cobalt-chromium-molybdenum master alloy liquid into a strip-shaped Ta-containing cobalt-chromium-molybdenum master alloy ingot of 20mm × 20mm × 100mm;

[0074] (2) Atomized powder making

[0075] The Ta-containing cobalt-chromium-molybdenum master alloy ingot obtained in s...

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Abstract

The invention provides Ta-contained 3D printing cobalt chromium molybdenum alloy powder for the dental department and a preparation method thereof. The chemical components of the alloy power comprise,by weight, 26.0%-30.0% of Cr, 8.0%-10.0% of Mo, 0.5%-5.0% of Ta, 3.0%-8.0% of W and the balance Co. The preparation method of the Ta-contained 3D printing cobalt chromium molybdenum alloy powder comprises the three steps of mother alloy smelting, powder atomization, powder screening and drying treatment. According to the alloy powder, the particle size, the sphericility degree and the mechanicalproperty are ensured, and meanwhile, the gold-procelain bonding property, the thermal stability and the flowability are improved while the oxygen content is reduced, the problems of porcelain crackingand porcelain spalling of a cobalt chromium molybdenum alloy are effectively solved, and obtaining of dental rebuilt parts with the high quality is facilitated.

Description

technical field [0001] The invention belongs to the field of dental restoration, and relates to a dental 3D printing cobalt-chromium-molybdenum alloy powder 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 The characteristics of complex shape objects, so it is especially suitable for the production of crowns, bridges, brackets, etc. in the field of dental 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, corrosion resistance and high temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08C22C19/07B33Y70/00
Inventor 李宁周亚男颜家振刘文博魏维
Owner CHENGDU KENINGDA MATERIALS
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