CN104357788B - Ni-Gr-B nano-coating and preparation method thereof - Google Patents
Ni-Gr-B nano-coating and preparation method thereof Download PDFInfo
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- CN104357788B CN104357788B CN201410604058.7A CN201410604058A CN104357788B CN 104357788 B CN104357788 B CN 104357788B CN 201410604058 A CN201410604058 A CN 201410604058A CN 104357788 B CN104357788 B CN 104357788B
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Abstract
The invention relates to a Ni-Gr-B nano-coating and a preparation method thereof. The Ni-Gr-B nano-coating comprises the following ingredients by mass percent: 16-27 percent of Ni, 21-42 percent of Gr, 33-56 percent of B, 2 percent of an additive and 1.25 percent of trace components. The preparation method comprises the following steps: at first, preparing a nanosphere from Ni, Gr and B in a dry grinding method, then mixing with the trace component materials by an activator protection method and adding the additive to prepare nano-powder, and finally spraying hypersonic flame on a substrate to form the coating. The Ni-Gr-B nano-coating and the preparation method have the advantages that the problem that a conventional coating is lower in abrasion resistance and corrosion resistance are solved, the microstructure and the structure of the coating on the material surface are improved, so that the hardness of the coating is improved by 50%, and the elasticity modulus is improved by 8.5% to 14.4%, which improves the abrasion resistance of the material surface overally.
Description
Technical field
The present invention relates to coating material technical field, specifically a kind of ni-gr-b nano coating and preparation method thereof.
Background technology
In many nanotechnologys, face coat technology of preparing is that rapid acquisition of metal material has property surface knot
The effective means of structure, improves the performance of part, has obtained in-depth study in recent years and has been widely applied.And supersonic speed is fiery
Flame is sprayed on relatively conventional in coating preparation field, and the principle of HVAF hvof is the mixed gas of combustion gas and oxygen
It is sent to the light district at lance outlet under high pressure and light.The thermal current of annular flow is subject to peripheral compressed air stream
Compression, be allowed to accelerate formed supersonic flame.Powder is sent to the exit of spray gun in the presence of carrier gas, enters burning fire
In flame, form coating, supersonic velocity flame plating equipment is by spray gun, powder feeder, control system, heat-exchange system and various pipeline five
Part forms, and belongs to compact spraying equipment, has the characteristics that simple to operate, working stability, burnup be low, coating performance is good.And show
Some coatings have the problem that wearability is poor, corrosion resistance is relatively low, and service life is shorter, has influence on normally making of matrix
With, and frequently change matrix waste time and energy, keep in repair, safeguard relatively costly.
Content of the invention
The technical problem to be solved is to provide a kind of ni-gr-b nano coating and preparation method thereof.
The technical problem to be solved employs the following technical solutions to realize:
A kind of ni-gr-b nano coating, including following components: ni, gr, b, auxiliary agent and micro constitutent, described each component institute
The mass percent accounting for is as follows:
Ni is 16%～27%, gr is 33%～56% for 21%～42%, b, and auxiliary agent is 2%, and micro constitutent is
1.25%.
Described micro constitutent material includes go, mo, si.
Described auxiliary agent is cbn, because material hardness is not high, so with the addition of auxiliary agent 2%cbn to improve hardness.
A kind of preparation method of ni-gr-b nano coating, described step is: first adopts dry grinding method by ni, gr, b system
Become nanosphere, then micro constitutent material is mixed with using activating agent Protection Code and adds the prepared nanometer powder of auxiliary agent, finally adopt
HVAF forms coating on matrix.
The invention has the beneficial effects as follows: the present invention solves the problems, such as that existing coating abrasion performance is poor, corrosion resistance is relatively low,
Improving microstructure, the structure of material surface coating, make coating hardness improve 50%, elastic modelling quantity improves 8.5%～
14.4%, thus the overall anti-wear performance improving material surface.
Specific embodiment
In order that the technological means realized of the present invention, creation characteristic, reached purpose and effect are easy to understand, below right
The present invention is expanded on further.
Embodiment one:
A kind of ni-gr-b nano coating, including following components: ni, gr, b, auxiliary agent and micro constitutent, described each component institute
The mass percent accounting for is as follows:
Ni is 16%, gr is 38.75% for 42%, b, and auxiliary agent is 2%, and micro constitutent is 1.25%.
Described micro constitutent material includes go, mo, si.
Described auxiliary agent is cbn, because material hardness is not high, so with the addition of auxiliary agent 2%cbn to improve hardness.
A kind of preparation method of ni-gr-b nano coating, described step is: first adopts dry grinding method by ni, gr, b system
Become nanosphere, then micro constitutent material is mixed with using activating agent Protection Code and adds the prepared nanometer powder of auxiliary agent, finally adopt
HVAF forms coating on matrix.
Embodiment two:
A kind of ni-gr-b nano coating, including following components: ni, gr, b, auxiliary agent and micro constitutent, described each component institute
The mass percent accounting for is as follows:
Ni is 27%, gr is 48.75% for 21%, b, and auxiliary agent is 2%, and micro constitutent is 1.25%.
Described micro constitutent material includes go, mo, si.
Described auxiliary agent is cbn, because material hardness is not high, so with the addition of auxiliary agent 2%cbn to improve hardness.
A kind of preparation method of ni-gr-b nano coating is identical with embodiment one.
Embodiment three:
A kind of ni-gr-b nano coating, including following components: ni, gr, b, auxiliary agent and micro constitutent, described each component institute
The mass percent accounting for is as follows:
Ni is 22%, gr is 43.75% for 33%, b, and auxiliary agent is 2%, and micro constitutent is 1.25%.
Described micro constitutent material includes go, mo, si.
Described auxiliary agent is cbn, because material hardness is not high, so with the addition of auxiliary agent 2%cbn to improve hardness.
A kind of preparation method of ni-gr-b nano coating is identical with embodiment one.
Example IV:
A kind of ni-gr-b nano coating, including following components: ni, gr, b, auxiliary agent and micro constitutent, described each component institute
The mass percent accounting for is as follows:
Ni is 18%, gr is 56% for 22.75%, b, and auxiliary agent is 2%, and micro constitutent is 1.25%.
Described micro constitutent material includes go, mo, si.
Described auxiliary agent is cbn, because material hardness is not high, so with the addition of auxiliary agent 2%cbn to improve hardness.
A kind of preparation method of ni-gr-b nano coating is identical with embodiment one.
In order to prove the actual effect of the present invention, spy is using HVAF technique in 4cr13 mould steel matrix
It is prepared for ni-gr-b coating.After embodiment one to example IV enforcement, test the bond strength of coating, microhardness, gas
Porosity and abrasive wear resistance.And using xrd, Phase Structure Analysis have been carried out to dusty spray Ji coating, shown with scanning electron
Micro mirror is observed to the coating morphology before and after dusty spray, abrasive wear.
Experimental result is as follows:
| Numbering | Porosity (area%) | Bond strength mpa | Microhardness (hv) |
| Embodiment one | 0.569 | 76.8 | 1194 |
| Embodiment two | 0.523 | 71.6 | 1139 |
| Embodiment three | 0.574 | 74.1 | 1254 |
| Example IV | 0.513 | 73.6 | 1243 |
| Meansigma methodss | 0.544 | 74 | 1207 |
| Contrast groups | 0.846 | 58 | 756 |
Wherein, contrast groups are 20cr matrix.
Spray coating alloy according to the present invention can get light, fine and close coating and good processing fineness, for repairing
Worn out bronze, stainless steel parts, it may also be used for repair the cavitation in rustless steel container, as the liner surface on pump shaft, machine
The coating on tool sealing surface or motor shaft surface etc..The hardness of ni-gr-b coating can be made to reach through the proportioning of different proportion
Hrc58, coating layer thickness is up to 2 millimeters.Through test of many times draw ni-gr-b coating bond strength, tissue consistency relatively
Good, coating density is in 9.96g/cm3.
In addition, the present invention has carried out three groups of wear extent test experiments, in every group of experiment, all test embodiment one to enforcement
Wear extent in example four, average data is counted, and is contrasted with contrast groups, and related data is as follows:
| Numbering | Meansigma methodss (g) before abrasion | Meansigma methodss (g) after abrasion | Wear extent meansigma methodss (mg) |
| Experiment 1 | 41.5687 | 41.4576 | 11 |
| Experiment 2 | 41.3658 | 41.3647 | 11 |
| Experiment 3 | 41.6874 | 41.6865 | 9 |
| Contrast groups | 41.9874 | 41.9765 | 109 |
Coating material according to the present invention is suitable for multiple steel, is suitable for the hardening of some material surface needs, but requires again not
Height, cheap, reach the purpose of hardened material again.Nano material according to the present invention is better than conventional washcoat material, hardness is high,
Wearability is good, has larger progress compared with conventional alloys material.As above-mentioned experimental data shows, at identical conditions
The wear extent of 20cr is 10 times of ni-gr-b coating, and this shows that the ni-gr-b coating of hvof preparation has excellent wear-resistant grain mill
Damage performance.These materials have the performances such as wear-resisting, anti-corrosion, resistance to high temperature oxidation, are modern mechanical manufacturings and wear-out part reparation is used again
Important materials.
Ultimate principle, principal character and the advantages of the present invention of the present invention have been shown and described above.The technology of the industry
The simply present invention it should be appreciated that the present invention is not limited by step embodiment, described in step embodiment and description for the personnel
Principle, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these change and
Improvement both falls within scope of the claimed invention.Claimed scope is by appending claims and its equivalent
Thing defines.
Claims (4)
1. a kind of ni-gr-b nano coating it is characterised in that: include following components: ni, gr, b, auxiliary agent and micro constitutent, described
Mass percent shared by each component is as follows:
Ni is 16%～27%, gr is 33%～56% for 21%～42%, b, and auxiliary agent is 2%, and micro constitutent is 1.25%.
2. a kind of ni-gr-b nano coating according to claim 1 it is characterised in that: described micro constitutent material includes
go、mo、si.
3. a kind of ni-gr-b nano coating according to claim 1 it is characterised in that: described auxiliary agent be cbn.
4. a kind of preparation method of ni-gr-b nano coating it is characterised in that: described ni-gr-b nano coating is included with the following group
Point: ni, gr, b, auxiliary agent and micro constitutent, the mass percent shared by described each component is as follows:
Ni is 16%～27%, gr is 33%～56% for 21%～42%, b, and auxiliary agent is 2%, and micro constitutent is 1.25%；
Described micro constitutent material includes go, mo, si；
Described step is: first using dry grinding method, ni, gr, b is made nanosphere, then is mixed with using activating agent Protection Code micro-
Amount composition simultaneously adds the prepared nanometer powder of auxiliary agent, finally adopts HVAF on matrix.
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| CN104357788B true CN104357788B (en) | 2017-01-25 |
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| DE102008053030A1 (en) * | 2008-10-24 | 2010-04-29 | Kme Germany Ag & Co. Kg | Metal / CNT and / or fullerene composite coating on tape materials |
| DE102009054427B4 (en) * | 2009-11-25 | 2014-02-13 | Kme Germany Ag & Co. Kg | Method for applying mixtures of carbon and metal particles to a substrate, substrate obtainable by the method and its use |
| KR101337994B1 (en) * | 2010-04-14 | 2013-12-06 | 한국과학기술원 | Graphene/metal nanocomposite powder and method of manufacturing thereof |
| KR101458759B1 (en) * | 2011-10-20 | 2014-11-14 | 한양대학교 산학협력단 | Nanocomposite comprising titanium oxide/metal nanoparticles/carbon nanostructures, and the preparing the nanocomposite, and DSSC electrode using the nanocomposite |
| CN102604593B (en) * | 2012-03-16 | 2014-03-12 | 北京师范大学 | Cubic-phase nickel nanostructure-graphene complex and preparation method thereof |
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