CN112064075A - Treatment process for improving surface wear resistance of automobile bearing - Google Patents
Treatment process for improving surface wear resistance of automobile bearing Download PDFInfo
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- CN112064075A CN112064075A CN202011016183.8A CN202011016183A CN112064075A CN 112064075 A CN112064075 A CN 112064075A CN 202011016183 A CN202011016183 A CN 202011016183A CN 112064075 A CN112064075 A CN 112064075A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
Abstract
The invention discloses a treatment process for improving the surface wear resistance of an automobile bearing; the method comprises the following steps of (1) carrying out activation treatment on the surface of an automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing into an activation solution to carry out activation treatment; adding the activated automobile bearing into plating solution for electroplating treatment, taking out after the electroplating treatment is finished, cleaning to be neutral, and adding into a drying box for drying, namely: the invention can greatly improve the surface activity of the automobile bearing and increase active groups by activating the surface of the automobile bearing, thereby greatly improving the bonding property between the formed plating layer and the automobile bearing matrix in the subsequent electroplating treatment process, greatly improving the adhesive force between the nano plating layer and the matrix and prolonging the service life of the plating layer.
Description
Technical Field
The invention belongs to the technical field of automobile bearings, and particularly relates to a treatment process for improving the surface wear resistance of an automobile bearing.
Background
The automobile bearing mainly refers to a hub bearing, the hub bearing (hub bearing) mainly has the functions of bearing and providing accurate guide for the rotation of a hub, and the hub bearing bears axial load and radial load and is a very important part. The bearing for the automobile wheel is formed by combining two sets of tapered roller bearings or ball bearings, and the installation, the oiling, the sealing and the clearance adjustment of the bearing are all carried out on an automobile production line.
The automobile wheel hub bearing is used as a power transmission part, when an automobile runs at a high speed, the automobile bearing also rotates at a high speed, when the automobile rotates at a high speed, friction can be generated, the temperature can be continuously raised due to long-time friction, meanwhile, the abrasion of the automobile wheel hub bearing is continuously increased, the abrasion of the automobile wheel hub bearing is easily aggravated, the mechanical property of the automobile wheel hub bearing is greatly reduced, and therefore the abrasion resistance of the automobile wheel hub bearing needs to be improved.
Disclosure of Invention
The invention aims to provide a treatment process for improving the wear resistance of the surface of an automobile bearing, so as to solve the defects in the prior art.
The technical scheme adopted by the invention is as follows:
a treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment;
and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying.
The preparation method of the activating solution comprises the following steps:
(1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution;
(2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion;
(3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product.
The mass fraction of the ethanol solution is 35 percent;
the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 7-9%;
the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 25-30 g: 500 mL.
The activation treatment comprises the following steps:
soaking the automobile bearing in the activating solution, heating to 50-55 ℃, preserving heat for 2-3 hours, then carrying out ultrasonic treatment for 5-8min, then taking out, cleaning to be neutral, and drying to constant weight. In the isobutyl triethoxy silane, the bond number of the molecular structure Si-O is more, so that the bonding chance with a metal substrate is increased, and the isobutyl triethoxy silane is grafted to the surface of an automobile bearing;
the ultrasonic frequency is 35kHz, and the power is 500W.
The plating solution is prepared from the following components in parts by weight: 20-25 parts of nickel sulfate, 12-18 parts of nickel nitrate, 5-8 parts of boric acid, 1.2-1.6 parts of nano silicon carbide, 3-5 parts of sodium dodecyl sulfate, 2.5-3 parts of zirconium sulfate, 0.02-0.025 parts of lanthanum nitrate and 120 parts of deionized water.
The weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1.
the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing.
The electroplating temperature is 35-38 ℃;
the electroplating time is 40 min;
the cathode current density is 0.58-0.61A/dm.
Has the advantages that:
the invention can greatly improve the surface activity of the automobile bearing and increase active groups by activating the surface of the automobile bearing, thereby greatly improving the bonding property between the formed plating layer and the automobile bearing matrix in the subsequent electroplating treatment process, greatly improving the adhesive force between the nano plating layer and the matrix and prolonging the service life of the plating layer.
The process of the invention forms a compact plating layer on the surface of the automobile bearing, the process of the invention carries out electroplating treatment on the surface of the automobile bearing, thereby forming a compact nano plating layer on the surface of the automobile bearing, and the compact nano plating layer is formed by depositing nickel crystal grains and nano silicon carbide on the surface of the automobile bearing.
Compared with the untreated automobile bearing surface, the hardness of the nano coating formed on the surface of the automobile bearing by the process is obviously improved, so that the surface hardness of the automobile bearing treated by the process is obviously improved, and the wear resistance of the automobile bearing is further enhanced by increasing the surface hardness of the automobile bearing, so that the wear can be better reduced during high-speed work, and the service life of the automobile bearing is further prolonged.
Detailed Description
A treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment;
and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying.
The preparation method of the activating solution comprises the following steps:
(1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution;
(2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion;
(3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product.
Isobutyl triethoxy silane
A transparent liquid in appearance;
isobutyl triethoxysilane content 99% (weight ratio);
the siloxane content is less than or equal to 0.3 percent;
the content of hydrolyzable chloride is less than or equal to 0.0001 percent;
density (25 ℃ C.) 0.88 g/cm2；
Maleic acid disodium salt
Appearance and properties: a white powder;
density: 1.499g/cm3；
Melting point: 138 ℃ and 139 ℃;
boiling point: 355.5 ℃ at 760 mmHg;
flash point: 183 ℃ is adopted;
the mass fraction of the ethanol solution is 35 percent;
the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 7-9%;
the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 25-30 g: 500 mL.
The activation treatment comprises the following steps:
soaking the automobile bearing in the activating solution, heating to 50-55 ℃, preserving heat for 2-3 hours, then carrying out ultrasonic treatment for 5-8min, then taking out, cleaning to be neutral, and drying to constant weight.
The ultrasonic frequency is 35kHz, and the power is 500W.
The plating solution is prepared from the following components in parts by weight: 20-25 parts of nickel sulfate, 12-18 parts of nickel nitrate, 5-8 parts of boric acid, 1.2-1.6 parts of nano silicon carbide, 3-5 parts of sodium dodecyl sulfate, 2.5-3 parts of zirconium sulfate, 0.02-0.025 parts of lanthanum nitrate and 120 parts of deionized water.
The weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1.
the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing.
The electroplating temperature is 35-38 ℃;
the electroplating time is 40 min;
the cathode current density is 0.58-0.61A/dm.
The following will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment; and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying. The preparation method of the activating solution comprises the following steps: (1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution; (2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion; (3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product. The mass fraction of the ethanol solution is 35 percent; the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 7%; the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 25 g: 500 mL. The activation treatment comprises the following steps: soaking the automobile bearing in the activating solution, heating to 50 ℃, preserving heat for 2 hours, then carrying out ultrasonic treatment for 5min, then taking out, cleaning to be neutral, and drying to be constant weight. The ultrasonic frequency is 35kHz, and the power is 500W. The plating solution is prepared from the following components in parts by weight: 20 parts of nickel sulfate, 12 parts of nickel nitrate, 5 parts of boric acid, 1.2 parts of nano silicon carbide, 3 parts of lauryl sodium sulfate, 2.5 parts of zirconium sulfate, 0.02 part of lanthanum nitrate and 120 parts of deionized water. The weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1. the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing. The electroplating temperature is 35 ℃; the electroplating time is 40 min; the cathode current density is 0.58A/dm.
Example 2
A treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment; and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying. The preparation method of the activating solution comprises the following steps: (1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution; (2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion; (3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product. The mass fraction of the ethanol solution is 35 percent; the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 9%; the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 30 g: 500 mL. The activation treatment comprises the following steps: soaking the automobile bearing in the activating solution, heating to 55 ℃, preserving heat for 3 hours, then carrying out ultrasonic treatment for 8min, then taking out, cleaning to be neutral, and drying to be constant weight. The ultrasonic frequency is 35kHz, and the power is 500W. The plating solution is prepared from the following components in parts by weight: 25 parts of nickel sulfate, 18 parts of nickel nitrate, 8 parts of boric acid, 1.6 parts of nano silicon carbide, 5 parts of lauryl sodium sulfate, 3 parts of zirconium sulfate, 0.025 parts of lanthanum nitrate and 120 parts of deionized water. The weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1. the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing. The electroplating temperature is 38 ℃; the electroplating time is 40 min; the cathode current density is 0.61A/dm.
Example 3
A treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment; and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying. The preparation method of the activating solution comprises the following steps: (1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution; (2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion; (3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product. The mass fraction of the ethanol solution is 35 percent; the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 8%; the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 28 g: 500 mL. The activation treatment comprises the following steps: soaking the automobile bearing in the activating solution, heating to 52 ℃, preserving heat for 2.5 hours, then carrying out ultrasonic treatment for 6min, then taking out, cleaning to be neutral, and drying to be constant weight. The ultrasonic frequency is 35kHz, and the power is 500W. The plating solution is prepared from the following components in parts by weight: 21 parts of nickel sulfate, 13 parts of nickel nitrate, 7 parts of boric acid, 1.5 parts of nano silicon carbide, 4 parts of sodium dodecyl sulfate, 2.9 parts of zirconium sulfate, 0.024 part of lanthanum nitrate and 120 parts of deionized water. The weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1. the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing. The electroplating temperature is 36 ℃; the electroplating time is 40 min; the cathode current density is 0.59A/dm.
Example 4
A treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment; and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying. The preparation method of the activating solution comprises the following steps: (1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution; (2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion; (3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product. The mass fraction of the ethanol solution is 35 percent; the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 8%; the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 26 g: 500 mL. The activation treatment comprises the following steps: soaking the automobile bearing in the activating solution, heating to 55 ℃, preserving heat for 2 hours, then carrying out ultrasonic treatment for 8min, then taking out, cleaning to be neutral, and drying to be constant weight. The ultrasonic frequency is 35kHz, and the power is 500W. The plating solution is prepared from the following components in parts by weight: 22 parts of nickel sulfate, 15 parts of nickel nitrate, 7 parts of boric acid, 1.5 parts of nano silicon carbide, 4 parts of sodium dodecyl sulfate, 2.8 parts of zirconium sulfate, 0.023 parts of lanthanum nitrate and 120 parts of deionized water. The weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1. the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing. The electroplating temperature is 36 ℃; the electroplating time is 40 min; the cathode current density is 0.60A/dm.
And (3) testing:
testing samples of examples and comparative examples by using a CET-I type material surface comprehensive tester under the test conditions of a test load of 250N and a reciprocating distance of 30mm, lubricating by using 5W-30 oil and continuously wearing for 1 h;
the automobile bearing material adopts GCr15 steel;
TABLE 1
| Coating wear/mg | |
| Example 1 | 1.557 |
| Example 2 | 1.526 |
| Example 3 | 1.505 |
| Example 4 | 1.423 |
| Comparative example 1 | 1.657 |
| Comparative example 2 | 2.821 |
| Blank control group | 4.053 |
Comparative example 1: a treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of adding the automobile bearing into a plating solution for electroplating, taking out after the electroplating treatment is finished, cleaning to be neutral, and adding into a drying box for drying. The preparation method of the activating solution comprises the following steps: (1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution; (2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion; (3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product. The plating solution is prepared from the following components in parts by weight: 22 parts of nickel sulfate, 15 parts of nickel nitrate, 7 parts of boric acid, 1.5 parts of nano silicon carbide, 4 parts of sodium dodecyl sulfate, 2.8 parts of zirconium sulfate, 0.023 parts of lanthanum nitrate and 120 parts of deionized water. The weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1. the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing. The electroplating temperature is 36 ℃; the electroplating time is 40 min; the cathode current density is 0.60A/dm;
comparative example 2: a treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment; and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying. The preparation method of the activating solution comprises the following steps: (1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution; (2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion; (3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product. The mass fraction of the ethanol solution is 35 percent; the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 8%; the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 26 g: 500 mL. The activation treatment comprises the following steps: soaking the automobile bearing in the activating solution, heating to 55 ℃, preserving heat for 2 hours, then carrying out ultrasonic treatment for 8min, then taking out, cleaning to be neutral, and drying to be constant weight. The ultrasonic frequency is 35kHz, and the power is 500W. The plating solution is prepared from the following components in parts by weight: 22 parts of nickel sulfate, 15 parts of nickel nitrate, 1.5 parts of nano silicon carbide, 4 parts of sodium dodecyl sulfate, 2.8 parts of zirconium sulfate and 120 parts of deionized water. The electroplating anode adopts a nickel plate, and the cathode is an automobile bearing. The electroplating temperature is 36 ℃; the electroplating time is 40 min; the cathode current density is 0.60A/dm;
blank control group: untreated automotive bearings;
as can be seen from Table 1, a compact plating layer is formed on the surface of the automobile bearing by the process of the invention, the surface of the automobile bearing is electroplated by the process of the invention, so that a compact nano plating layer is formed on the surface of the automobile bearing, and the compact nano plating layer is formed by depositing nickel crystal grains and nano silicon carbide on the surface of the automobile bearing.
The samples and the comparative samples were subjected to microhardness testing (several tests, mean value) using a microhardness tester of the HVS-1000 type, respectively:
the automobile bearing material adopts GCr15 steel;
TABLE 2
| microhardness/HV | |
| Example 1 | 648.6 |
| Example 2 | 648.1 |
| Example 3 | 649.3 |
| Example 4 | 652.5 |
| Comparative example 2 | 638.1 |
| Blank control group | 626.3 |
Comparative example 2: a treatment process for improving the surface wear resistance of an automobile bearing comprises the steps of carrying out activation treatment on the surface of the automobile bearing to obtain an activated automobile bearing, and specifically, immersing the activated automobile bearing in an activation solution to carry out activation treatment; and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying. The preparation method of the activating solution comprises the following steps: (1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution; (2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion; (3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product. The mass fraction of the ethanol solution is 35 percent; the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 8%; the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 26 g: 500 mL. The activation treatment comprises the following steps: soaking the automobile bearing in the activating solution, heating to 55 ℃, preserving heat for 2 hours, then carrying out ultrasonic treatment for 8min, then taking out, cleaning to be neutral, and drying to be constant weight. The ultrasonic frequency is 35kHz, and the power is 500W. The plating solution is prepared from the following components in parts by weight: 22 parts of nickel sulfate, 15 parts of nickel nitrate, 1.5 parts of nano silicon carbide, 4 parts of sodium dodecyl sulfate, 2.8 parts of zirconium sulfate and 120 parts of deionized water. The electroplating anode adopts a nickel plate, and the cathode is an automobile bearing. The electroplating temperature is 36 ℃; the electroplating time is 40 min; the cathode current density is 0.60A/dm;
blank control group: untreated automotive bearings;
as can be seen from Table 2, the hardness of the nano-coating formed on the surface of the automobile bearing by the process of the invention is obviously improved compared with the hardness of the surface of an untreated automobile bearing, so that the hardness of the surface of the automobile bearing treated by the process of the invention is obviously improved, and the wear resistance of the automobile bearing is further enhanced by increasing the hardness of the surface of the automobile bearing, thereby better reducing the wear during high-speed work and further prolonging the service life of the automobile bearing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the illustrated embodiments, and all the modifications and equivalents of the embodiments may be made without departing from the spirit of the present invention.
Claims (9)
1. A treatment process for improving the surface wear resistance of an automobile bearing is characterized in that the surface of the automobile bearing is subjected to activation treatment to obtain an activated automobile bearing, and specifically, the activated automobile bearing is immersed in an activation solution to be subjected to activation treatment;
and adding the activated automobile bearing into the plating solution for electroplating treatment, taking out after the electroplating treatment is finished, washing to be neutral, and adding into a drying box for drying.
2. The treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 1, wherein the treatment process comprises the following steps: the preparation method of the activating solution comprises the following steps:
(1) preparing an ethanol solution, dissolving ethanol in water, and stirring uniformly to obtain the ethanol solution;
(2) adding isobutyl triethoxysilane into ethanol solution, stirring at 500r/min for 20min to obtain isobutyl triethoxysilane dispersion;
(3) and adding the disodium maleate into the isobutyl triethoxysilane dispersion liquid, and continuously and uniformly stirring to obtain the finished product.
3. The treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 2, wherein the treatment process comprises the following steps: the mass fraction of the ethanol solution is 35 percent;
the mass fraction of the isobutyl triethoxysilane in the isobutyl triethoxysilane dispersion liquid is 7-9%;
the mixing mass ratio of the disodium maleate to the isobutyl triethoxysilane dispersion liquid is 25-30 g: 500 mL.
4. The treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 1, wherein the treatment process comprises the following steps: the activation treatment comprises the following steps:
soaking the automobile bearing in the activating solution, heating to 50-55 ℃, preserving heat for 2-3 hours, then carrying out ultrasonic treatment for 5-8min, then taking out, cleaning to be neutral, and drying to constant weight.
5. The treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 1, wherein the treatment process comprises the following steps: the ultrasonic frequency is 35kHz, and the power is 500W.
6. The treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 1, wherein the treatment process comprises the following steps: the plating solution is prepared from the following components in parts by weight: 20-25 parts of nickel sulfate, 12-18 parts of nickel nitrate, 5-8 parts of boric acid, 1.2-1.6 parts of nano silicon carbide, 3-5 parts of sodium dodecyl sulfate, 2.5-3 parts of zirconium sulfate, 0.02-0.025 parts of lanthanum nitrate and 120 parts of deionized water.
7. The treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 6, wherein the treatment process comprises the following steps: the weight ratio of the nickel sulfate to the lanthanum nitrate is 1000: 1.
8. the treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 1, wherein the treatment process comprises the following steps: the electroplating anode adopts a nickel plate, and the cathode is an automobile bearing.
9. The treatment process for improving the wear resistance of the surface of the automobile bearing according to claim 1, wherein the treatment process comprises the following steps: the electroplating temperature is 35-38 ℃;
the electroplating time is 40 min;
the cathode current density is 0.58-0.61A/dm.
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