Method for manufacturing electric plating diamond burr

A technology for electroplating diamond and manufacturing method, which is applied to electrolytic coatings, dental tools, coatings, etc., can solve the problems of easy falling off of diamond particles, peeling off of the coating layer, and fracture of the needle base body, so as to reduce the probability of breakage and enhance the coating layer. Bonding force, the effect of preventing breakage accidents

Inactive Publication Date: 2009-05-06

HARBIN ENG UNIV

3 Cites 15 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an electroplated diamond bur that can solve the problems that the diamond particles are easy to fall off duri...

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Method used

The cross-section of the nickel-titanium alloy bur substrate after heat treatment is polished after No. 1000 sandpaper grinding, utilizes X-ray energy spectrum analyzer to carry out Ti and Ni element to the interface between the nickel-plated layer on the cross-section and the nickel-titanium alloy substrate line scan component analysis. The results show that when the nickel-titanium alloy substrate is used, a 28 micron thick diffusion layer is formed between the nickel plating layer and the substrate during heat treatment, and the interface bonding strength is greatly improved....

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Abstract

The invention provides a method for manufacturing a plated diamond needle, which takes nickel-titanium alloy as a substrate of the needle, and comprises the following steps: firstly, the nickel-titanium alloy substrate of the needle is processed; secondly, the nickel-titanium alloy substrate of the needle and diamond particles are subjected to electroplating pre-treatment; thirdly, a composite diamond clad layer is coated on the head of the needle by means of direct-current electroplating; and fourthly, the diamond needle prepared is subjected to vacuum heat-treatment after electroplating. The method has the advantages that: firstly, the nickel-titanium alloy substrate of the needle has strong impact resistance, and the fracture probability of the substrate of the needle under the actuation of impulsive load is reduced, so that the fracture accident of the substrate of the needle can be effectively prevented; and secondly, due to adoption of the nickel-titanium alloy substrate of the needle and the heat-treatment technology after electroplating, a diffused layer is formed on an interface between the nickel-titanium alloy substrate of the needle and a metallic nickel clad layer, and metallic nickel in the clad layer and titanium in the nickel-titanium alloy substrate of the needle form intermetallic compounds, so that the bonding force of the clad layer is greatly reinforced, and the service life of the diamond needle is further improved.

Application Domain

Electrolytic coatingsDental tools

Technology Topic

Metallic NickelTitanium alloy +11

Examples

Experimental program(5)

Example Embodiment

[0038] The preparation process of the composite coating in step three of the present invention is: preparing plating solution→priming plating→sanding plating→thickening plating. The composition of the electroplating solution is NiSO 4 ·6H 2 O 250~350g·L -1 , NiCl 2 ·6H 2 O 35~50g·L -1 , H 3 BO 3 30-45g·L -1 , Sodium lauryl sulfate 0.05~0.1g·L -1.

[0039] The primer plating in step 3 of the present invention includes impact plating and empty plating. The electroplating process parameters of impact nickel plating: 2-4A/dm 2 , Time 5-15min; the electroplating process parameters of empty nickel plating: 0.5-3A/dm 2 , Time 10-30min.

[0040] In the preparation of the diamond composite coating in step 3 of the present invention, an annular hollow electrolytic nickel column or four symmetrically distributed electrolytic nickel plates are used as anodes.

[0041] The sand plating in step 3 of the present invention is to add a sand bath to the above-mentioned plating solution. The sand bath is made of polytetrafluoroethylene. The four sides and bottom surface are drilled with holes to facilitate the transportation of the plating solution. Wrapped with nylon cloth and filled with emery. Sand plating adopts sand-buried method, that is, insert the bur base into the sand tank at a 45 degree angle, and change the direction of the bur when the sanding time is halfway. The process parameters of diamond sanding are 1.5-5A/dm 2 , Sanding time is 30-60min.

[0042] The thickening plating in step 3 of the present invention is carried out after removing the upper sand tank from the above-mentioned plating solution. The process parameters of thickening plating are 1-3A/dm 2 , Thickening plating time is 60-300min.

[0043] The electroplating post-treatment process in step 4 of the present invention is: putting the diamond bur into a vacuum heat treatment furnace, and holding it at a temperature of 350-600°C for 30-150 min.

Example Embodiment

[0044] Specific embodiment 1: Research on the heat treatment process after nickel plating on the surface of nickel-titanium alloy

[0045] The nickel-titanium alloy bur substrate is used as the research object, and the composition is Ti-50.8 at.% Ni. Before electroplating, the nickel-titanium alloy sheet is pretreated.

[0046] (1) Pretreatment process

[0047] a. Insulate the non-plated part of the nickel-titanium alloy bur base with a thermoplastic tube.

[0048] b. Put the nickel-titanium alloy bur base into the acetone solution, ultrasonically clean for 15 minutes, and then rinse with distilled water.

[0049] c. When containing NaOH 50g/l, Na 2 CO 3 40g/l, Na 3 PO 4 30g/l and Na 2 SiO 3 Carry out alkaline washing and degreasing in 5g/l lye, keep the temperature at 80℃ for 20min, then wash under ultrasonic condition for 10min, and rinse with distilled water.

[0050] d. In HF and HNO 3 Mixed solution (volume ratio HF (40wt.%): HNO 3 (65wt.%)=1:3) etched to red smoke, and then rinsed with distilled water.

[0051] e. In HCl and H 2 SO 4 Mixed solution (HCl 350ml/L and H 2 SO 4 650ml/L) for 15 minutes, then rinse with distilled water.

[0052] (2) Plating

[0053] a. Prepare electroplating solution, its composition is: NiSO 4 ·6H 2 O 280g·L -1 , NiCl 2 ·6H 2 O 45g·L -1 , H 3 BO 3 40g·L -1 , Sodium lauryl sulfate 0.05~0.1g·L -1.

[0054] b. The nickel-titanium alloy bur substrate is subjected to impact nickel plating, the process parameter is: 3A/dm 2 , Time 10min.

[0055] c. For empty nickel plating, the electroplating process parameters are: 1.5A/dm 2 , Time 4h.

[0056] (3) Heat treatment after plating

[0057] The electroplated nickel-titanium alloy bur base is vacuum-encapsulated and then heat-treated at a temperature of 400°C for 60 minutes and then cooled in a furnace.

[0058] The section of the heat-treated Nitinol bur substrate is ground with 1000 sandpaper and polished, and the interface between the nickel-plated layer on the section and the Nitinol substrate is scanned by X-ray energy spectrum analyzer. Component analysis. The results show that with a nickel-titanium alloy substrate, a 28-micron-thick diffusion layer is formed between the nickel-plated layer and the substrate during the heat treatment process, and the interface bonding strength is greatly improved.

Example Embodiment

[0059] Specific embodiment two: the electroplated nickel-titanium alloy bur base is vacuum packaged and then heat treated, the treatment temperature is 850°C, the temperature is kept for 60 minutes, and then it is cooled in the furnace. Others are the same as the first embodiment.

[0060] After the heat treatment, the section of the nickel-titanium alloy bur substrate is polished with 1000# sandpaper, and the interface between the nickel-plated layer on the section and the nickel-titanium alloy substrate is lined with Ti and Ni elements using an X-ray energy spectrum analyzer. Scan component analysis. The results show that the nickel-titanium alloy substrate can form a diffusion layer between the nickel-plated layer and the substrate during the heat treatment process, and the interface bonding strength is greatly improved.

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Classification and recommendation of technical efficacy words

Strong impact resistance
Reduce the chance of breaking

Method for manufacturing electric plating diamond burr

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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