CN103849860A - Boron carbide friction spacer and chemical plating and ultrasonic wave combined manufacturing method thereof - Google Patents
Boron carbide friction spacer and chemical plating and ultrasonic wave combined manufacturing method thereof Download PDFInfo
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- CN103849860A CN103849860A CN201410089592.9A CN201410089592A CN103849860A CN 103849860 A CN103849860 A CN 103849860A CN 201410089592 A CN201410089592 A CN 201410089592A CN 103849860 A CN103849860 A CN 103849860A
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- boron carbide
- norbide
- composite deposite
- chemical plating
- spring steel
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Abstract
The invention relates to a method for preparing a boron carbide friction spacer by combining chemical plating with ultrasonic wave. The method for preparing the boron carbide friction spacer by combining chemical plating with ultrasonic wave comprises the following steps: preparing chemical plating solution containing boron carbide, heating the chemical plating solution by virtue of a temperature control heating device, maintaining constant temperature, placing a spring steel spacer, and applying intermittent ultrasonic wave for co-depositing nickel phosphorus alloy and boron carbide on the surface of the spring steel spacer, so that a Ni-P-B4C composite coating is formed, and performing thermal treatment on the plated spacer at the temperature of 200-400 DEG C; B4C particles are uniformly inlaid in the Ni-P-B4C composite coating and in a half naked state. By adopting the composite coating structure, under predetermined load, boron carbide particles penetrate into the contacted working surface, surface meshing degree between the boron carbide friction spacer and a workpiece is improved, binding force and connection strength between mechanical joint elements are improved, so that the transmittability of force and moment is enhanced, the size and weight of a component are reduced, the application safety factor is increased, the aims of reducing cost and energy loss are realized, and the requirements of energy conservation and emission reduction are met.
Description
Technical field
The present invention relates to the technology of preparing of norbide friction shim, be specially a kind of electroless plating and intermittent type ultrasonic wave in conjunction with the method for preparing norbide friction shim, and the norbide friction shim of the method acquisition.
Background technology
Day by day pursue today of low cost, less energy-consumption, lightweight and high security at automobile, machinery industry, high strength connection and the high-power output realized between mechanical component have realistic meaning, need to introduce new material and design scheme makes member have compact design and high power density, and can weight reduction, reduce size, improve performance, reduce costs, and have higher safety coefficient, and resistance to wear, be not subject to the features such as the impact of oil film.
At present, also there is no the report about " electroless plating and intermittent type ultrasonic wave are in conjunction with the method for preparing norbide friction shim ".
Summary of the invention
One of object of the present invention is to provide a kind of friction shim that can improve frictional coefficient and have microcosmic lock function, thereby can under the prerequisite that guarantees strength of joint and high power density, alleviate size and the weight of part, improve safety coefficient and wear resistance, and be not subject to the impact of oil film; Two of object is to provide a kind of electroless plating and intermittent type ultrasonic wave in conjunction with the method for preparing norbide friction shim, and the method technique is simple, and cost is lower, easy to operate, and environmental protection is environmentally friendly pollution-free.
Electroless plating and ultrasonic wave, in conjunction with a method of preparing norbide friction shim, comprise the following steps:
Micron order boron carbide powder is added in nickel-phosphorus electroless plating solution and is uniformly dispersed and forms the chemical plating fluid containing norbide, by temperature control heating device, this chemical plating fluid containing norbide is heated and made to keep 80-90 ℃ of constant temperature, put into spring steel pad, apply intermittent type ultrasonic wave by ultrasonic washing instrument simultaneously, to spring steel pad plating 30 – 60min, make nickel-phosphorus alloy and micron order boron carbide powder codeposition in the surface of spring steel pad, form Ni-P-B
4c composite deposite; Wherein, the pH value of the described chemical plating fluid containing norbide is 4.5-5.0, and its component comprises single nickel salt 22-25g/L, inferior sodium phosphate 24-27g/L and micron order boron carbide powder 6-12g/L;
Take out the spring steel pad after plating, cleaning dries up, and carries out thermal treatment in 0.5-2 hour at 200-400 ℃ of temperature.
Wherein, the hyperacoustic frequency of described intermittent type is 20-50 kHz, and the intermittent time is 8-15s.
Described Ni-P-B
4c thickness of multiple plating is 13-17 micron.
At described Ni-P-B
4in C composite deposite, Ni-P(nickel-phosphorus alloy) and B
4c(norbide) mass ratio of particle is 10:0.5 ~ 2.
At described Ni-P-B
4in C composite deposite, B
4c uniform particles is embedded in this composite deposite, is half naked state.
At described Ni-P-B
4on C composite deposite surface, all B
4the surface-area sum of the exposed portion of C particle is described Ni-P-B
415% ~ 30% of C composite deposite surface-area.
The median size of described boron carbide powder is 25 microns.Described spring steel pad can adopt spring steel band to make.
The described chemical plating fluid containing norbide can adopt existing multiple nickel-phosphorus electroless plating solution configuration.In preferably implementing, the described each component concentration of chemical plating fluid containing norbide is: single nickel salt 22-25g/L, inferior sodium phosphate 24-27g/L, propionic acid 2.2-2.5mg/L, lactic acid 30-33mg/L, Sodium Fluoride 0.5-0.8g/L and micron order boron carbide powder 6-12g/L.
A kind of norbide friction shim of preparing by aforesaid method, comprises spring steel pad, and the surface of this spring steel pad has Ni-P-B
4c composite deposite; At described Ni-P-B
4in C composite deposite, B
4c uniform particles is embedded in this composite deposite, is half naked state.
Wherein, described Ni-P-B
4c thickness of multiple plating is 13-17 micron.
At described Ni-P-B
4on C composite deposite surface, all B
4the surface-area sum of the exposed portion of C particle is described Ni-P-B
415% ~ 30% of C composite deposite surface-area.
At described Ni-P-B
4in C composite deposite, Ni-P alloy and B
4the mass ratio of C particle is preferably 10:0.5 ~ 2.
The present invention forms norbide friction shim by electroless plating and intermittent type ultrasonic wave in conjunction with a step Composite Coatings, and for multistep processes, composite deposite through-thickness presents continuous homogenizing characteristic, has improved coating strength, hardness and wear resistance and solidity to corrosion.
Electroless plating is pollution-free, and not containing heavy metal, liquid waste disposal is convenient, is beneficial to environment protection.Electroless plating is not subject to the impact of workpiece shape, the each position of workpiece coating even compact, and thickness error is little, and hardness is high.
In electroless plating process, introduce ultrasonic wave, the activation that hyperacoustic " cavitation effect " can increase workpiece surface is put and is accelerated gas and departs from from workpiece surface, makes coating finer and close evenly, reduces pin hole and pit and fast reaction speed.
Intermittent type ultrasonic wave can make boron carbide particles dispersed and suspension in solution, can reduce again the probability that mutually collides friction between particle, improves the sedimentation effect of boron carbide particles at matrix surface.The benefit of doing is like this can avoid causing that because adding too much boron carbide particles in solution plating solution decomposes, and can obtain on surface again the deposition of high boron carbide particles.
At the Ni-P-B of norbide friction shim of the present invention
4in C composite deposite, its B
4c uniform particles is embedded in this composite deposite, is half naked state.With the comparison of conventional springs pad, norbide friction shim of the present invention has higher frictional coefficient and maximum static friction force, can promote the transmission of wind tunnel, improves the security in practical application; Reduce screw and connect needed size; Reduce the quantity of fastening piece and the volume of part and weight; Reduce costs and energy waste.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope pattern of the boron carbide particles that adopts of the present invention;
Fig. 2, Fig. 3 are norbide friction shim surface scan Electronic Speculum patterns;
Fig. 4, Fig. 5 are mating surface figure looks after installing/dismounting;
Fig. 6 is the Ni-P-B of norbide friction shim
4in C composite deposite, the EDS of nickel phosphorus (Ni-P) alloy analyzes.
Embodiment
Further illustrate below in conjunction with embodiment.
Norbide friction shim preparation method of the present invention, to realize in conjunction with the hyperacoustic step composite chemical plating mode of intermittent type.The method comprises the steps:
Getting in proportion single nickel salt 23g/L, inferior sodium phosphate 25g/L, propionic acid 2.3mg/L, lactic acid 32mg/L and Sodium Fluoride 0.6g/L puts into there-necked flask and configures nickel-phosphorus electroless plating solution.
The boron carbide powder of anticipating is added in above-mentioned nickel-phosphorus chemical plating liquor and stirred by 8g/L amount, be uniformly dispersed and form the chemical plating fluid containing norbide, pH value is 4.8; Chemical plating fluid (comprising this there-necked flask) containing norbide is placed in to ultrasonic washing instrument; Then, heat to 85 ℃ of maintenance constant temperature by temperature control heating device, spring steel pad good pre-treatment is put into this plating solution, the intermittent type ultrasonic wave that to apply frequency simultaneously and be 35KHz, intermittent time be 10s, to spring steel pad plating 45min, make nickel-phosphorus alloy and micron order boron carbide powder codeposition in the surface of spring steel pad, form Ni-P-B
4c composite deposite;
Then, take out the spring steel pad after plating, cleaning dries up, and puts into retort furnace thermal treatment 1.5 hours at 300 ℃ of temperature, obtains norbide friction shim, as shown in Figures 2 and 3.
In above-mentioned preparation method, boron carbide powder employing median size is the granule materials of 25 microns, it is to obtain through following processing in advance, be that boron carbide powder soaks removal of impurities, ultrasonic cleaning and dispersion through persalt, adopt again retort furnace roasting to obtain uniform particles, the clean boron carbide particles in surface, as shown in Figure 1.
Spring steel pad adopts spring steel band to make.Before the plating of spring steel pad, need to carry out oil removing and activation, make surface cleaning without stain, water embrane method is tested, until moisture film is continuously without fracture.
Adjusting plating time can be by Ni-P-B
4the control of C thickness of multiple plating is 13-17 micron.
Regulate the above-mentioned norbide content in the chemical plating fluid of norbide that contains, can make Ni-P-B
4ni-P alloy and B in C composite deposite
4the mass ratio of C particle is 10:0.5 ~ 2.
Ultrasonic washing instrument is equipped with formula power supply at adjustable intermittence.When batch production, adopt the equipment such as electroless plating tank
With reference to Fig. 2, Fig. 3 norbide friction shim surface scan Electronic Speculum figure, B
4c uniform particles is embedded in Ni-P-B
4in C composite deposite, be half naked state.All B
4the surface-area sum of the exposed portion of C particle is Ni-P-B
415% ~ 30% of C composite bed surface-area.There is this Ni-P-B
4the norbide friction shim of C composite deposite, under predetermined load, boron carbide particles thrusts on the working face of contact with it, increase frictional force and surperficial mesh degree between working face, bonding force between elevating gear part and strength of joint, thereby promote the transmittability of force and moment, reduce size and the weight of member, reduce screw and connect needed size, reduce the quantity of fastening piece and the volume of part and weight, improve the safety coefficient in practical application, and have wear-resisting, corrosion-resistant and be not subject to the advantages such as oil film effect.
Fig. 6 is the Ni-P-B of norbide friction shim
4in C composite deposite, the EDS of nickel phosphorus (Ni-P) alloy analyzes.
In electroless plating process, introduce ultrasonic wave, the activation that " cavitation effect " can increase workpiece surface is put and is accelerated gas and departs from from workpiece surface, makes coating finer and close evenly, reduces pin hole and pit and reduces temperature of reaction and fast reaction speed.
Introduce intermittent type ultrasonic wave, in guaranteeing that boron carbide particles is dispersed and being suspended in plating solution in, also greatly reduce the probability that mutually collides friction between particle, improve the sedimentation effect of boron carbide particles at matrix surface.The benefit of doing is like this can avoid causing plating solution Auto-decomposition because adding too much boron carbide particles in solution, can obtain on surface again the deposition of high boron carbide particles, when in plating solution, boron carbide powder content is 6-12g/L, and all B
4the surface-area sum of the exposed portion of C particle is Ni-P-B
415% ~ 30% of C composite bed surface-area.
The present invention adopts a step Composite Coatings method, and for multistep processes, coating through-thickness presents continuous homogenizing characteristic, has improved intensity, hardness and wear resistance and the solidity to corrosion of coating.
Fig. 4, Fig. 5 are the figure looks of mating surface after installing/dismounting.Therefrom can find out, the boron carbide particles after installing on friction shim penetrates in mating surface, plays the effect that increases bonding strength between frictional coefficient and workpiece.
By specific embodiment, the present invention has been done to detailed explanation above, these detailed descriptions can not think that the present invention only only limits to the content of these embodiment.Those skilled in the art conceive according to the present invention, these descriptions any improvement of making in conjunction with general knowledge known in this field, be equal to replacement scheme, all should be included in the protection domain of the claims in the present invention.
Claims (10)
1. electroless plating and ultrasonic wave, in conjunction with a method of preparing norbide friction shim, comprise the following steps:
Micron order boron carbide powder is added in nickel-phosphorus electroless plating solution and is uniformly dispersed and forms the chemical plating fluid containing norbide, by temperature control heating device, this chemical plating fluid containing norbide is heated and made to keep 80-90 ℃ of constant temperature, put into spring steel pad, apply intermittent type ultrasonic wave by ultrasonic equipment simultaneously, to spring steel pad plating 30 – 60min, make nickel-phosphorus alloy and micron order boron carbide powder codeposition in the surface of spring steel pad, form Ni-P-B
4c composite deposite; Wherein, the pH value of the described chemical plating fluid containing norbide is 4.6-5.0, and its component comprises single nickel salt 22-25g/L, inferior sodium phosphate 24-27g/L and micron order boron carbide powder 6-12g/L;
Take out the spring steel pad after plating, cleaning dries up, and at 200-400 ℃ of temperature, heat-treats.
2. according to method claimed in claim 1, it is characterized in that, the hyperacoustic frequency of described intermittent type is 20-50 kHz, and the intermittent time is 8-15s.
3. according to method claimed in claim 1, it is characterized in that, at described Ni-P-B
4in C composite deposite, Ni-P alloy and B
4the mass ratio of C particle is 10:0.5 ~ 2.
4. according to the method described in claim 1 or 2 or 3, it is characterized in that, at described Ni-P-B
4in C composite deposite, B
4c uniform particles is embedded in this composite deposite, is half naked state.
5. method according to claim 4, is characterized in that: at described Ni-P-B
4on C composite bed surface, all B
4the surface-area sum of the exposed portion of C particle is described Ni-P-B
415% ~ 30% of C composite deposite surface-area.
6. method according to claim 1, is characterized in that, the median size of described boron carbide powder is 25 microns, described Ni-P-B
4c composite bed thickness is 13-17 micron.
7. method according to claim 1, is characterized in that, the described chemical plating fluid containing norbide further comprises propionic acid 2.2-2.5mg/L, lactic acid 30-33mg/L and Sodium Fluoride 0.5-0.8g/L.
8. a norbide friction shim, comprises spring steel pad, it is characterized in that, the surface of described spring steel pad has Ni-P-B
4c composite deposite; At described Ni-P-B
4in C composite deposite, B
4c uniform particles is embedded in this composite deposite, is half naked state.
9. norbide friction shim according to claim 8, is characterized in that: at described Ni-P-B
4on C composite deposite surface, all B
4the surface-area sum of the exposed portion of C particle is described Ni-P-B
415% ~ 30% of C composite deposite surface-area.
10. norbide friction shim according to claim 8 or claim 9, is characterized in that: at described Ni-P-B
4in C composite deposite, Ni-P alloy and B
4the mass ratio of C particle is 10:0.5 ~ 2; Described Ni-P-B
4c composite bed thickness is 13-17 micron.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410089592.9A CN103849860B (en) | 2014-03-11 | 2014-03-11 | The method for making of a kind of boron carbide friction shim and chemical plating thereof and ultrasonic wave combination |
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|---|---|---|---|
| CN201410089592.9A CN103849860B (en) | 2014-03-11 | 2014-03-11 | The method for making of a kind of boron carbide friction shim and chemical plating thereof and ultrasonic wave combination |
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| CN103849860A true CN103849860A (en) | 2014-06-11 |
| CN103849860B CN103849860B (en) | 2016-05-25 |
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Citations (7)
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| JPS56105442A (en) * | 1980-01-24 | 1981-08-21 | Tatsuro Kuratomi | Composite agglomerated body of cubic boron nitride and hard carbide and production thereof |
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| CN101013679A (en) * | 2007-01-29 | 2007-08-08 | 清华大学 | Method for preparing integrated circuit copper interconnecting line and barrier layer with ultrasonic chemistry |
| CN102392235A (en) * | 2011-11-09 | 2012-03-28 | 程绍鹏 | Super-hard ceramal chemical compound solution and plating method thereof |
| CN102758194A (en) * | 2012-08-13 | 2012-10-31 | 长春工业大学 | Diamond chemical composite plating method for producing automatic friction gasket |
| CN103388137A (en) * | 2013-07-02 | 2013-11-13 | 中国科学院金属研究所 | Nano stack membrane subjected to chemical plating of Ni-P and preparation method thereof |
-
2014
- 2014-03-11 CN CN201410089592.9A patent/CN103849860B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56105442A (en) * | 1980-01-24 | 1981-08-21 | Tatsuro Kuratomi | Composite agglomerated body of cubic boron nitride and hard carbide and production thereof |
| US20050112399A1 (en) * | 2003-11-21 | 2005-05-26 | Gray Dennis M. | Erosion resistant coatings and methods thereof |
| CN1880502A (en) * | 2005-06-15 | 2006-12-20 | 中国科学院金属研究所 | Magnesium alloy nano chemical composite plating solution and process for preparing same and application thereof |
| CN101013679A (en) * | 2007-01-29 | 2007-08-08 | 清华大学 | Method for preparing integrated circuit copper interconnecting line and barrier layer with ultrasonic chemistry |
| CN102392235A (en) * | 2011-11-09 | 2012-03-28 | 程绍鹏 | Super-hard ceramal chemical compound solution and plating method thereof |
| CN102758194A (en) * | 2012-08-13 | 2012-10-31 | 长春工业大学 | Diamond chemical composite plating method for producing automatic friction gasket |
| CN103388137A (en) * | 2013-07-02 | 2013-11-13 | 中国科学院金属研究所 | Nano stack membrane subjected to chemical plating of Ni-P and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| B.BOZZINI ET AL.: "Relationships among crystallographic structure, mechanical properties and tribological behaviour of electroless Ni-P(9%)/B4C films", 《WEAR》 * |
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