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Preparation method for high-wear-resistance micro-arc oxide layer of titanium alloy well-drilling workpiece

A technology of micro-arc oxidation layer and high wear resistance, applied in coating, surface reaction electrolytic coating, electrolytic coating, etc. And, can not improve the film layer structure and other problems, to achieve the effect of enhancing particle dispersion and suspension stability, preventing particle aggregation, and good corrosion and wear resistance

Inactive Publication Date: 2019-11-22
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the articles mentioned the size of the electrolyte particles added, and the particles with too large particle size are difficult to enter the pores on the surface of the ceramic layer, and cannot improve the film structure; in addition, the solid particles in the electrolyte need to Only by distributing and filling the oxidized ceramic layer more evenly can the overall corrosion resistance and wear resistance of the film layer be improved, but none of the above experiments involved the dispersion, suspension stability and agglomeration of particles in the electrolyte; at the same time, In this paper, only high hardness and wear-resistant oxide solid particles are added to reduce the friction coefficient through the mechanism of filling pores and dispersion strengthening, that is, improving the surface physical structure to play the role of micro-lubrication and micro-cutting, but the addition itself does not Particles with good lubricity, so it is still possible to further improve the wear resistance of the micro-arc oxidation particle-reinforced composite film layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a highly wear-resistant micro-arc oxidation layer of a titanium alloy drilling workpiece, comprising the following steps:

[0021] Step 1. Clean the surface of the TC4 titanium alloy drilling workpiece with acetone to remove stains such as engine oil, and then put it into deionized water for ultrasonic cleaning to remove acetone;

[0022] Step 2, according to each component of following concentration: the NaH of 52g 2 PO 2 , 56g of Na 2 SiO 3 , 50g of NaAlO 2 , prepared into an electrolyte with a mixing volume of 2L:

[0023] Step 3, adding concentration to the electrolytic solution in step 2 is that the average molecular weight of 16g ​​of dispersant CE64 and 4g is the suspension stabilizer PEG of 10000;

[0024] Step 4: Add 16g of SiC powder with a nanoscale particle size of 5~20nm and 12g of nanoscale Al with a particle size of 5~20nm to the electrolyte in step 3 2 o 3 Powder, 10g of nano-scale graphite powder with a particle size of 50-...

Embodiment 2

[0027] A method for preparing a highly wear-resistant micro-arc oxidation layer of a titanium alloy drilling workpiece, comprising the following steps:

[0028] Step 1. Clean the surface of the TC4 titanium alloy drilling workpiece with acetone to remove stains such as engine oil, and then put it into deionized water for ultrasonic cleaning to remove acetone;

[0029] Step 2, according to each component of following quality: the NaH of 320g 2 PO 2 , 320g of Na 2 SiO 3 , 300g of NaAlO 2 , to prepare an electrolyte with a mixing volume of 20L:

[0030] Step 3, adding a quality of 60g of dispersant CE64 and 10g of suspension stabilizer PEG with an average molecular weight of 10,000 in the electrolyte in step 2;

[0031] Step 4: Add 300g of SiC powder with a nanoscale particle size of 5~20nm and 240g of nanoscale Al with a particle size of 5~20nm to the electrolyte in step 3 2 o 3 Powder (purity 99.95%), 440g of nano-scale graphite powder with a particle size of 50-100nm, a...

Embodiment 3

[0034] A method for preparing a highly wear-resistant micro-arc oxidation layer of a titanium alloy drilling workpiece, comprising the following steps:

[0035] Step 1. Clean the surface of the TC4 titanium alloy drilling workpiece with acetone to remove stains such as engine oil, and then put it into deionized water for ultrasonic cleaning to remove acetone;

[0036] Step 2, according to each component of following concentration: the NaH of 20g 2 PO 2 , 20g of Na 2 SiO 3, 40g of NaAlO 2 , to prepare an electrolyte solution with a mixing volume of 1L:

[0037] Step 3, adding concentration to the electrolytic solution in step 2 is 5g of dispersant CE64 and 1.5g of suspension stabilizer PEG with an average molecular weight of 10,000;

[0038] Step 4: Add 11g of SiC powder with a nanoscale particle size of 5~20nm and 9g of nanoscale Al with a particle size of 5~20nm to the electrolyte in step 3 2 o 3 Powder, 16g of nano-scale graphite powder with a particle size of 50-100n...

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Abstract

The invention provides a preparation method for a high-wear-resistance micro-arc oxide layer of a titanium alloy well-drilling workpiece. The preparation method for the high-wear-resistance micro-arcoxide layer of the titanium alloy well-drilling workpiece comprises the following steps: step 1, carrying out oil removal treatment on the surface of the workpiece; step 2, preparing an electrolyte according to the components with the following concentrations: 16-26g / L of NaH2PO2, 16-28g / L of Na2SiO3 and 15-25g / L of NaAlO2; step 3, adding CE64 and PEG into the electrolyte; step 4, adding nanoscaleSiC powder, Al2O3 powder and graphite powder into the electrolyte in the step 3, and carrying out ultrasonic-assisted dispersion; and step 5, placing the workpiece into the electrolyte, and under anultrasonic condition, preparing a composite film layer on the surface of the workpiece by a direct-current pulse micro-arc oxidization method. The high-wear-resistance micro-arc oxide layer, preparedby the preparation method, of the titanium alloy well-drilling workpiece is high in film layer uniformity, low in surface roughness, and better in corrosion resistance and wear resistance because of being carried with a self-lubricating particle modified surface layer.

Description

technical field [0001] The invention belongs to the technical field of metal surface modification, and in particular relates to a preparation method of a highly wear-resistant micro-arc oxidation layer of a titanium alloy drilling workpiece. Background technique [0002] With the advancement of oil drilling technology, titanium alloy materials have gradually replaced other metal materials due to their advantages such as high specific strength, light weight, good toughness, and corrosion resistance, and become the main raw material for drilling workpieces. Generally, the surface of the workpiece is plated with metal layer, or the method of surface micro-arc oxidation, which is a new technology for in-situ growth of oxide ceramic film on the surface of Al, Ti and other metals and their alloys. [0003] In order to further extend the service life of titanium alloy drilling workpieces to meet the drilling needs of deeper waters and oil wells, titanium alloy micro-arc oxidation t...

Claims

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Application Information

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IPC IPC(8): C25D11/26C25D15/00
CPCC25D11/026C25D11/26C25D15/00
Inventor 刘喜波冯杉
Owner LUOYANG SUNRUI TI PRECISION CASTING
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