CN115976602A - Titanium-based wear-resistant coating with reticulate pattern structure and preparation method thereof - Google Patents
Titanium-based wear-resistant coating with reticulate pattern structure and preparation method thereof Download PDFInfo
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Abstract
A titanium-based wear-resistant coating with a reticulate pattern structure and a preparation method thereof are disclosed, wherein the surface of a titanium material is coated, the coating process is to perform cyclic coating in a double-coating tank system by adopting a bidirectional pulse power supply, so that a coating with a reticulate pattern-shaped structure on a compact layer is formed, the compact layer of the coating adopting common thermoelectric chemical oxidation is in an irregular shape, the hardness of the compact layer with the reticulate pattern-shaped structure is 0.5-1 times that of the compact layer polished to the same thickness by using a single coating mode, meanwhile, the reticulate pattern structure is polished until the compact layer has the reticulate pattern-shaped structure, the hardness of the reticulate pattern structure at a bright part is greater than that of a gray area, after a wear-resistant interface works for a period of time, the gray area is ground more quickly to form a pit structure, and the bright part with relatively high hardness is not easy to wear, so that the reticulate pattern structure for oil storage is formed, the pit structure is easy to store lubricating oil, the operation is simple, and the time consumption is short.
Description
Technical Field
The invention relates to the technical field of thermoelectric chemical oxidation, in particular to a preparation method of a titanium-based wear-resistant coating with oil storage reticulate patterns.
Background
The thermoelectric chemical oxidation is a new surface treatment technology which is developed rapidly at home and abroad in recent years, and is developed on the basis of anodic oxidation, a high working voltage is adopted, a working area of the voltage is introduced into a high-voltage discharge area from a Faraday area of a common anodic oxidation method, arc discharge is utilized to enhance and activate, so that the reaction generated on an anode is enabled to cause corona, glow, micro-arc discharge and even spark spots to appear on the surface of a workpiece under a certain current density, a layer of compact ceramic membrane is formed in situ on the surface of valve metal, the ceramic membrane is metallurgically bonded with a substrate, the bonding strength is good, the hardness is high, the ceramic membrane has the characteristics of good wear resistance, good corrosion resistance, good high-voltage insulation, good high-temperature impact resistance and the like, and the service life of the workpiece can be prolonged by several times or even tens of times.
The existing ceramic layer is generally divided into two layers, one layer is a compact layer close to a base metal, the other layer is a loose porous layer outside the compact layer, the existing polishing mode is to polish the loose porous layer, the compact layer is used as a working wear-resistant working interface, and then, when the ceramic layer is used, grooving is carried out on the wear-resistant working interface to form an annular texture groove for storing lubricating oil.
Disclosure of Invention
The invention aims to provide a method for coating a titanium-based wear-resistant coating with a reticulate pattern structure, which is characterized in that the surface of a titanium material is coated, the coating process is that a double-coating tank system is adopted and a bidirectional pulse power supply is adopted for cyclic coating, so that a coating with a compact layer having a reticulate pattern structure is formed, the compact layer of the coating adopting common thermoelectric chemical oxidation is in an irregular form, the hardness of the compact layer having the reticulate pattern structure is 0.5-1 times that of the compact layer polished to the same thickness by using a single coating mode, meanwhile, the reticulate pattern structure is polished until the compact layer has the reticulate pattern structure, the hardness of the reticulate pattern structure at a bright part is greater than that of a gray region, after a wear-resistant interface works for a period of time, the gray region can be ground more quickly to form a pit structure, the bright part with relatively high hardness is not easy to wear, the reticulate pattern structure is integrally formed, and the formed pit structure is easy to store lubricating oil, and is simple in operation and short in time consumption.
The present applicant has completed the present application on this basis.
The invention aims to provide a preparation method of a titanium-based wear-resistant coating with a reticulate pattern structure, which comprises the following steps:
step1, cutting and forming a workpiece containing a titanium material;
step2, immersing the formed workpiece into corresponding electrolyte, and circularly coating the film by adopting a double plating tank system and a bidirectional pulse power supply to form a film with a compact layer having a reticulate structure;
and Step3, polishing the coated film layer until the coated film with the reticulate structure is finished, wherein the coated film with the reticulate structure is used as a working layer, namely the wear-resistant interface layer.
Further, in Step1, the titanium-containing material comprises: pure titanium or titanium alloys.
Further, in Step1, the titanium-containing material is a TC4 titanium alloy.
Further, in Step1, the existing workpiece made of titanium-containing material is a one-piece workpiece, so that it is necessary to cut it into a profile, for example: sheet material or strip shape.
Further, in Step2, the formed workpiece is completely immersed into the corresponding electrolyte.
Further, step2 further comprises the following steps: the double plating tank systems are connected with a bidirectional pulse power supply to form a circulating coating, so that the coated workpieces are alternately changed into an anode and a cathode, and the coated workpieces can be subjected to intermittent and discontinuous coating.
More specifically, a double plating tank system is adopted, the double plating tank system comprises two independent cylindrical electrodes, electrolyte is contained in the cylindrical electrodes, each cylindrical electrode is connected with an independent electrolyte circulation system, a same formed workpiece is placed in each of the two cylindrical electrodes, the two formed workpieces are connected through a lead, the two cylindrical electrodes are respectively connected with a bidirectional pulse power supply, so that the coated workpieces are alternately changed into an anode and a cathode, specifically, when the coated workpiece is used as the anode, a thermoelectric chemical oxidation reaction is carried out, and when the coated workpiece is used as the cathode, the thermoelectric chemical oxidation reaction is stopped, so that intermittent and discontinuous coating can be carried out on the coated workpiece.
And the common form of the thermoelectric chemical plating film is as follows: the pulse power supply is a bidirectional pulse power supply, in a single plating tank system, the anode is connected with the formed workpiece, and the cathode is connected with an inert conductor electrode to form a loop, so that a coating is formed on the loop, wherein the inert conductor electrode is made of stainless steel.
Further, in Step2, the pulse frequency of the bidirectional pulse power supply is 50 to 1000Hz, the current density is 10 to 30A/dm < 2 >, the duty ratio is 20 to 80 percent, and the application time is 5 to 90 minutes.
Furthermore, in Step2, the pulse frequency of the bidirectional pulse power supply is 500 to 1000Hz, the duty ratio is 60 to 80 percent, and the application time is 30 to 60 minutes.
Further, in Step2, the electrolyte includes, but is not limited to: 10-30 g/L sodium phosphate or 10-20 g/L sodium hexametaphosphate.
Furthermore, in Step2, the electrolyte is 20-30 g/L of sodium phosphate or 10-15 g/L of sodium hexametaphosphate.
Further, in Step2, the electrolyte is sodium phosphate or 15g/L sodium hexametaphosphate 25 g/L.
Further, in Step2, the temperature of the electrolyte is in the range of 20 to 40 ℃.
Further, in Step3, the thickness of the wear-resistant interface layer accounts for 30% -60% of the thickness of the whole film layer of the coating film, and the thickness of the loose layer is thinner, and the thickness of the compact layer is thicker.
Furthermore, in Step3, the thickness of the whole film layer is 50-80 um, and the thickness of the wear-resistant interface layer is 25-40 um.
The invention has the beneficial effects that: the invention provides a preparation method of a titanium-based wear-resistant coating with a reticulate pattern structure, which comprises the steps of coating a film on the surface of a titanium material, wherein the film coating process is that a film is circularly coated in a double-plating tank system by adopting a bidirectional pulse power supply, so that a film with a reticulate pattern structure on a compact layer is formed, the compact layer of the film subjected to common thermoelectric chemical oxidation is in an irregular shape, the hardness of the compact layer with the reticulate pattern structure is 0.5-1 times that of the compact layer which is polished to the same thickness by using a single film coating mode, meanwhile, the reticulate pattern structure is polished until the compact layer has the reticulate pattern structure, the hardness of the reticulate pattern structure at a bright part is greater than that of a gray area, after a wear-resistant interface works for a period of time, the gray area can be ground into a pit structure more quickly, and the bright part with relatively high hardness is not easy to wear, so that the oil storage reticulate pattern structure is integrally formed, and the lubricating oil is easy to store in the pit structure, and the operation is simple and the time consuming is short.
Drawings
The above described and other features of the present disclosure will be more fully described when read in conjunction with the following drawings. It is appreciated that these drawings depict only several embodiments of the disclosure and are therefore not to be considered limiting of its scope. The present disclosure will be described more clearly and in detail by using the accompanying drawings.
Fig. 1 is an SEM image of a dense layer on the surface of a titanium alloy of example 1 of the present application.
Fig. 2 is an SEM image of a dense layer on the surface of the titanium alloy of example 2 of the present application.
Detailed Description
The following examples are described to aid in the understanding of the present application and are not, and should not be construed to, limit the scope of the present application in any way.
Example 1:
cutting and forming a workpiece of the titanium alloy, such as: the method comprises the following steps of (1) completely immersing a formed workpiece into a corresponding electrolyte, wherein the electrolyte comprises but is not limited to: 20g/L sodium phosphate or 15g/L sodium hexametaphosphate, the temperature range of the electrolyte is 30 ℃, a pulse power supply is adopted as a bidirectional pulse power supply, the pulse frequency of the bidirectional pulse power supply is 500Hz, the current density is 20A/dm < 2 >, the duty ratio is 60%, the application time is 20 minutes, 40 minutes and 60 minutes, in a single plating tank system, the anode is connected with the formed workpiece, the cathode is connected with an inert conductor electrode to form a loop, so that a plating film is formed on the inert conductor electrode, wherein the inert conductor electrode is stainless steel; polishing the coating film layer until the thickness of the coating film layer is the same as that of the coating film with the reticulate structure, wherein the coating film with the thickness is used as a working layer, namely a wear-resistant interface layer, and the thickness of the wear-resistant interface layer accounts for 40-50% of the thickness of the whole coating film layer.
The appearance of the coating surface of the sample was observed by using a QuantaFEG 450 field emission environment scanning electron microscope (philips, netherlands) to obtain the SEM image of fig. 1. As can be seen from fig. 1, the dense layer of the conventional thermoelectric chemical oxidation coating film has an irregular morphology after polishing.
Meanwhile, the hardness of the coating of the sample was measured using an MHVS-1000 micro Vickers hardness tester (Laizhou Huayu Fuxin tester Co., ltd.) to obtain the data in Table 1.
Table 1: hardness detection data of common wear-resistant interface layer
Example 2:
cutting and forming a workpiece of the titanium alloy, such as: a plate or a strip, and completely immersing the formed workpiece into a corresponding electrolyte, wherein the electrolyte includes but is not limited to: 20g/L sodium phosphate or 15g/L sodium hexametaphosphate, the temperature range of the electrolyte is 30 ℃, a pulse power supply is adopted as a bidirectional pulse power supply, the pulse frequency of the bidirectional pulse power supply is 500Hz, the current density is 20A/dm < 2 >, the duty ratio is 60%, the application time is 20 minutes, 40 minutes and 60 minutes, a double plating tank system is adopted, the double plating tank system comprises two independent cylindrical electrodes, the cylindrical electrodes are internally provided with the electrolyte, each cylindrical electrode is connected with an independent electrolyte circulating system, two identically formed workpieces are respectively placed in the two cylindrical electrodes, the two formed workpieces are connected through a lead, the two cylindrical electrodes are respectively connected with the bidirectional pulse power supply, so that the plated workpieces are alternately used as an anode and a cathode, specifically, when the plated workpieces are used as the anodes, the thermoelectric chemical oxidation reaction is carried out, when the plated workpieces are used as the cathodes, the thermoelectric chemical oxidation reaction is stopped, and the plated workpieces can be intermittently and discontinuously plated; polishing the coating film layer until the coating film layer with a reticulate pattern structure has a thickness, wherein the polished coating film layer serves as a working layer, namely a wear-resistant interface layer, and the thickness of the wear-resistant interface layer accounts for 40% -50% of the thickness of the whole coating film layer.
The appearance of the coating surface of the sample was observed by using a QuantaFEG 450 field emission environment scanning electron microscope (philips, netherlands) to obtain an SEM image of fig. 2. As can be seen in fig. 2, the densified layer has a textured structure after sanding.
Meanwhile, the hardness of the coating of the sample was measured using an MHVS-1000 micro vickers hardness tester (wallace well-trusted testing instruments ltd, leizhou) to obtain the data in table 2. As can be seen from table 2, the hardness of the densified layer with the textured structure is 0.5 to 1 times that of the densified layer ground to the same thickness using a single plating method, compared to table 1.
Table 2: surface hardness detection data of wear-resistant coating with reticulate pattern structure
While various aspects and embodiments have been disclosed herein, it will be apparent to those skilled in the art that other aspects and embodiments may be made without departing from the spirit of the disclosure, and that several modifications and improvements may be made without departing from the scope of the disclosure. The various aspects and embodiments disclosed herein are presented by way of example only and are not intended to limit the present disclosure, which is to be controlled in the spirit and scope of the appended claims.
Claims (10)
1. A preparation method of a titanium-based wear-resistant coating with a reticulate pattern structure comprises the following steps:
step1, cutting and forming a workpiece containing a titanium material;
step2, immersing the formed workpiece into corresponding electrolyte, and circularly coating by adopting a double-plating-tank system and a bidirectional pulse power supply to form a coating film with a compact layer having a reticulate structure on a coating film layer;
and Step3, polishing the coated film layer until the coated film with the reticulate structure is finished, wherein the coated film with the reticulate structure is used as a working layer, namely the wear-resistant interface layer.
2. The method for preparing a titanium-based wear-resistant coating with a textured structure of claim 1, wherein in Step1, the titanium-containing material comprises: pure titanium or titanium alloys.
3. A method for preparing a titanium-based wear-resistant coating with a textured structure as claimed in claim 1, wherein the formed workpiece is completely immersed in the corresponding electrolyte in Step 2.
4. The method for preparing a titanium-based wear-resistant coating with a textured structure as claimed in claim 1, wherein in Step2, the method further comprises the following steps: the double plating tank systems are connected with a bidirectional pulse power supply to form a circulating coating, so that the coated workpieces are alternately changed into an anode and a cathode, and the coated workpieces can be subjected to intermittent and discontinuous coating.
5. A process for preparing a titanium-based wear-resistant coating having a textured structure according to claim 1, wherein in Step2, the pulse frequency of the bi-directional pulse power supply is 50 to 1000Hz, the current density is 10 to 30A/dm2, the duty ratio is 20 to 80%, and the application time is 5 to 90 minutes.
6. The method for preparing a titanium-based wear-resistant coating with a textured structure as claimed in claim 1, wherein in Step2, the electrolyte comprises but is not limited to: 10-30 g/L of sodium phosphate or 10-20 g/L of sodium hexametaphosphate.
7. A process for preparing a titanium base wear resistant coating having a textured structure as claimed in claim 1, wherein the temperature of the electrolyte in Step2 is in the range of 20 to 40 ℃.
8. The method for preparing a titanium-based wear-resistant coating with a textured structure as claimed in claim 1, wherein in Step3, the thickness of the wear-resistant interface layer accounts for 30-60% of the thickness of the whole coating film.
9. The method for preparing a titanium-based wear-resistant coating with a textured structure as claimed in claim 1, wherein in Step3, the thickness of the whole coating film is 50-80 um, and the thickness of the wear-resistant interface layer is 25-40 um.
10. A titanium-based wear resistant coating having a textured structure prepared according to the process of any one of claims 1 to 9.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214361765U (en) * | 2020-12-31 | 2021-10-08 | 西比里电机技术(苏州)有限公司 | Parallel multistage thermoelectric chemical oxidation plating tank |
| CN113832514A (en) * | 2021-09-28 | 2021-12-24 | 西比里电机技术(苏州)有限公司 | Method for improving surface hardness and wear resistance of titanium-containing material |
| CN114232046A (en) * | 2021-12-31 | 2022-03-25 | 西比里电机技术(苏州)有限公司 | Equipment for carrying out thermoelectric chemical oxidation treatment on aluminum foil |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214361765U (en) * | 2020-12-31 | 2021-10-08 | 西比里电机技术(苏州)有限公司 | Parallel multistage thermoelectric chemical oxidation plating tank |
| CN113832514A (en) * | 2021-09-28 | 2021-12-24 | 西比里电机技术(苏州)有限公司 | Method for improving surface hardness and wear resistance of titanium-containing material |
| CN114232046A (en) * | 2021-12-31 | 2022-03-25 | 西比里电机技术(苏州)有限公司 | Equipment for carrying out thermoelectric chemical oxidation treatment on aluminum foil |
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