Electrolyte plasma polishing method for titanium alloy femoral stem prosthesis

A plasma and titanium alloy technology, applied in the field of plasma polishing, can solve the problems of high dependence on the surface quality of workers, large noise pollution in the working environment, endangering the health of operators, etc. Hazards to worker health, no effect of noise pollution

Pending Publication Date: 2021-10-29
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, mechanical polishing is difficult to polish workpieces with complex shapes and structures. The surface quality consistency of polished workpieces is highly dependent on workers' operations. After polishing, it may cause damage such as microcracks on the workpiece surface, and the efficiency is relatively low. Environmental noise pollution is high, and dust pollution will also be caused when grinding the longitudinal or transverse concave-convex ridges on the femoral stem; electrochemical polishing can polish workpieces with complex shapes, but the electrolyte used is often highly corrosive and highly concentrated. Strong oxidizing strong acid or strong alkali solution will endanger the health of operators, and the polishing waste liquid is difficult to deal with, which will cause environmental pollution problems

Method used

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  • Electrolyte plasma polishing method for titanium alloy femoral stem prosthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of electrolyte plasma polishing method of titanium alloy femoral stem prosthesis, comprises the following steps:

[0034] Step 1, preparation of polishing liquid:

[0035] Step 1.1, calculate the amount of each solute according to the total volume of the polishing solution to be configured. The solute includes ammonium fluoride and potassium fluoride. The total volume of the prepared polishing solution is 1L. The amount of each solute is: ammonium fluoride: 5g, fluoride Potassium: 30g;

[0036] Step 1.2, according to the calculation results, weigh ammonium fluoride and potassium fluoride into the container, add deionized water to reach the total volume, stir and dissolve to obtain the polishing solution, and set aside;

[0037] Step 2, electrolyte plasma polishing treatment:

[0038] Step 2.1, put the polishing solution prepared in step 1 in the polishing pool, and heat it in a constant temperature water bath and keep the temperature at 75°C;

[0039] Step 2.2...

Embodiment 2

[0050] A kind of electrolyte plasma polishing method of titanium alloy femoral stem prosthesis, comprises the following steps:

[0051] Step 1, preparation of polishing liquid:

[0052] Step 1.1, calculate the amount of each solute according to the total volume of the polishing solution to be configured. The solute includes ammonium fluoride and potassium fluoride. The total volume of the prepared polishing solution is 1L. The amount of each solute is: ammonium fluoride: 3g, fluoride Potassium: 10g;

[0053] Step 1.2, according to the calculation results, weigh ammonium fluoride and potassium fluoride into the container, add deionized water to reach the total volume, stir and dissolve to obtain the polishing solution, and set aside;

[0054] Step 2, electrolyte plasma polishing treatment:

[0055] Step 2.1, put the polishing solution prepared in step 1 in the polishing pool, and heat it in a constant temperature water bath and keep the temperature at 70°C;

[0056] Step 2.2...

Embodiment 3

[0063] A kind of electrolyte plasma polishing method of titanium alloy femoral stem prosthesis, comprises the following steps:

[0064] Step 1, preparation of polishing liquid:

[0065] Step 1.1, calculate the amount of each solute according to the total volume of the polishing solution to be configured. The solute includes ammonium fluoride and potassium fluoride. The total volume of each preparation is 1L of polishing solution. The amount of each solute is: ammonium fluoride: 25g, fluoride Potassium chloride: 60g;

[0066] Step 1.2, according to the calculation results, weigh ammonium fluoride and potassium fluoride into the container, add deionized water to reach the total volume, stir and dissolve to obtain the polishing solution, and set aside;

[0067] Step 2, electrolyte plasma polishing treatment:

[0068] Step 2.1, put the polishing solution prepared in step 1 in the polishing pool, and heat it in a constant temperature water bath and keep the temperature at 90°C; ...

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Abstract

The invention relates to the field of metal material surface treatment, in particular to an electrolyte plasma polishing method for a titanium alloy femoral stem prosthesis. The method comprises the following steps that a polishing solution containing ammonium fluoride and potassium fluoride is prepared; the polishing solution is heated in a constant-temperature water bath, and the temperature is kept at 70-90 DEG C; a fixture clamping a titanium alloy femoral stem prosthesis workpiece is connected with an anode and arranged above a polishing pool, and a conductive material is connected with a cathode; 300-500-V direct-current high voltage is applied between the cathode and the anode, the workpiece is lowered at the speed of 0.1-20 cm / s till the workpiece is completely immersed in the position 1-20 cm below the liquid level of the polishing solution, and the surface current density of the workpiece is kept at 0.12-0.6 A / cm<2>; and a stable gas layer completely wrapping the workpiece is formed on the surface of the workpiece, the gas layer is subjected to disruptive discharge to generate plasma, and the workpiece is polished for 1-30 min.

Description

technical field [0001] The invention relates to the field of surface treatment of metal materials, in particular to an electrolyte plasma polishing method for a titanium alloy femoral stem prosthesis. Background technique [0002] Titanium alloy has excellent properties such as excellent biocompatibility, low density, high strength, physiological corrosion resistance and low elastic modulus, and has been widely used in the field of biomedicine. TC4 titanium alloy is currently the most commonly used metal material for medical implants in orthopedics and dentistry. It is often used to manufacture artificial prostheses such as dental bridges, hip femoral stems, knee joints, and fracture plates. [0003] In the actual design and production process, the titanium alloy femoral stem prosthesis will produce a surface oxide layer during the forging process, which often needs to be pickled to remove the surface oxide layer; for better clinical effects, the femoral stem is often design...

Claims

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Application Information

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IPC IPC(8): C25F3/26C25F7/00
CPCC25F3/26C25F7/00
Inventor 孙桓五杨冬亮李思雪段海栋纪刚强孙彦兵
Owner TAIYUAN UNIV OF TECH
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