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Surface-modified selective laser cladding cobalt-chromium alloy and preparation method and application thereof

A technology of laser cladding and cobalt-chromium alloy, which is applied in the coating process and coating of metal materials, can solve the problems of less research on bonding performance, achieve compact bonding, improve metal-ceramic bonding performance, and increase metal-ceramic bonding strength Effect

Active Publication Date: 2021-08-31
CHENGDU KENINGDA MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many previous studies focused on casting cobalt-chromium alloys, and there are few studies on improving the bonding performance of selective laser cladding cobalt-chromium alloys.

Method used

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  • Surface-modified selective laser cladding cobalt-chromium alloy and preparation method and application thereof
  • Surface-modified selective laser cladding cobalt-chromium alloy and preparation method and application thereof
  • Surface-modified selective laser cladding cobalt-chromium alloy and preparation method and application thereof

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preparation example Construction

[0030] The present invention also provides a method for preparing a surface-modified selective laser cladding cobalt-chromium alloy described in the above technical solution, comprising the following steps:

[0031] The selective laser cladding cobalt-chromium alloy is placed in an acid solution and subjected to corrosion treatment to obtain the corroded cobalt-chromium alloy;

[0032] The corroded cobalt-chromium alloy is placed in an electrolyte solution, and electrodeposition treatment is performed to obtain a surface-modified selective laser cladding cobalt-chromium alloy; the composition of the electrolyte solution includes nickel chloride 5-10g / L, chlorine Cobalt chloride 7-15g / L, chromium chloride 3-8g / L, tungsten chloride 8-12g / L, thiourea 3-6g / L and potassium pyrophosphate 20-30g / L.

[0033] In the invention, the selective laser cladding cobalt-chromium alloy is placed in an acid solution for corrosion treatment to obtain the corroded cobalt-chromium alloy. In the pr...

Embodiment 1

[0051] (1) The cobalt-chromium alloy powder whose chemical composition is Cr 25.15wt.%, W 5.36wt.%, Mo 4.09wt.%, Si 0.93wt.% and the balance of Co is printed with selective laser cladding equipment The block is then cut into 25mm×3mm×0.5mm selective laser cladding cobalt-chromium alloy sheet (original state) by EDM, such as figure 1 shown on the left.

[0052] (2) The selective laser cladding cobalt-chromium alloy sheet is placed in a mixed solution of copper sulfate and hydrochloric acid for corrosion treatment, the concentration of hydrochloric acid in the mixed solution of copper sulfate and hydrochloric acid is 5wt.%, and the concentration of copper sulfate %, the temperature of the corrosion treatment is controlled by a water bath at 25°C, and the corrosion treatment is performed for 2 minutes; then the obtained alloy is washed with water and ethanol to obtain a corroded cobalt-chromium alloy sheet;

[0053] (3) the cobalt-chromium alloy sheet after described corrosion i...

Embodiment 2

[0064] (1) The cobalt-chromium alloy powder whose chemical composition is Cr 25.23wt.%, W 5.06wt.%, Mo 4.78wt.%, Si 0.73wt.% and the balance of Co is printed with selective laser cladding equipment The block is then cut into 25mm×3mm×0.5mm selective laser cladding cobalt-chromium alloy sheets by EDM.

[0065] (2) The selective laser cladding cobalt-chromium alloy sheet is placed in a mixed solution of copper sulfate and hydrochloric acid for corrosion treatment, the concentration of hydrochloric acid in the mixed solution of copper sulfate and hydrochloric acid is 3wt.%, and the concentration of copper sulfate %, the temperature of the corrosion treatment is controlled by a water bath at 25°C, and the corrosion treatment is performed for 2 minutes; then the obtained alloy is washed with water and ethanol to obtain a corroded cobalt-chromium alloy sheet;

[0066] (3) the cobalt-chromium alloy sheet after described corrosion is placed in electrolytic solution, carries out electr...

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Abstract

The invention provides a surface-modified selective laser cladding cobalt-chromium alloy and a preparation method and application thereof, and relates to the technical field of biological alloys. The surface-modified selective laser cladding cobalt-chromium alloy comprises a selective laser cladding cobalt-chromium alloy and a cobalt-chromium-nickel-tungsten coating deposited on the surface of the selective laser cladding cobalt-chromium alloy, and the cobalt-chromium-nickel-tungsten coating comprises the following chemical components in percentage by mass: 35%-50% of cobalt, 15%-25% of chromium, 5%-15% of nickel and 5%-25% of tungsten. According to the surface-modified selective laser cladding cobalt-chromium alloy and the preparation method and application thereof, the thickness of a diffusion layer and an oxide layer on the surface of the selective laser cladding cobalt-chromium alloy can be increased through the cobalt-chromium-nickel-tungsten coating, the roughness of the surface of the selective laser cladding cobalt-chromium alloy is improved, meanwhile, the nickel element and the tungsten element are added into the cobalt-chromium-nickel-tungsten coating, combination of the cobalt-chromium alloy and ceramic can be more compact, and then the gold-ceramic bonding strength is improved.

Description

technical field [0001] The invention relates to the technical field of biological alloys, in particular to a surface-modified selective laser cladding cobalt-chromium alloy and a preparation method and application thereof. Background technique [0002] Selective laser cladding technology (SLM) is a kind of metal 3D printing technology, which is widely used in the field of dental restoration, because it is very suitable for the preparation of personalized and complex parts, and can easily meet the needs of different patients. Cobalt-chromium alloy was first used to make artificial joints with outstanding biocompatibility and has been widely used in the oral cavity. Because it does not contain nickel and beryllium elements harmful to the human body, it is safe, reliable, and reasonably priced. Cobalt-chromium alloy porcelain Dental has become the first choice for non-precious metal porcelain, suitable for the restoration of most teeth, especially for fixed restorations such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/07C22C30/00
CPCC23C24/106C22C19/07C22C30/00
Inventor 李宁颜家振董鑫张幖李锐张玉鲜刘楠
Owner CHENGDU KENINGDA MATERIALS
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