CN104388883A - WC-CBN nano-coating and preparation method thereof - Google Patents
WC-CBN nano-coating and preparation method thereof Download PDFInfo
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- CN104388883A CN104388883A CN201410604534.5A CN201410604534A CN104388883A CN 104388883 A CN104388883 A CN 104388883A CN 201410604534 A CN201410604534 A CN 201410604534A CN 104388883 A CN104388883 A CN 104388883A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to a WC-CBN nano-coating and a preparation method thereof. The WC-CBN nano-coating comprises the following components by mass percentage: 21%-40% of WC, 57%-76% of CBN, 2% of additives and 1% of trace elements. The preparation method comprises the following steps: firstly thoroughly mixing WC and CBN materials by virtue of a sol-gel method and adding a catalyst to prepare nanospheres, mixing trace elements and additives by virtue of an active agent protection method to obtain nanopowder; finally spraying nanopowder on the surface of a substrate through a plasma spraying device to form the coating. By the nano-coating and the preparation method thereof, the problems of poor wear resistance and relatively low corrosion resistance of the traditional coating are solved, the microstructure and structure of the surface coating of the material are improved, the hardness of the coating is increased by 44%, the toughness is increased by 80%, the modulus of elasticity is increased by 8.5%-14.4%, and thus the wear resistance and toughness of the surface of the material are integrally increased and meanwhile, the nano-coating has a significant effect on the increase of the improved overall mechanical properties.
Description
Technical field
The present invention relates to Rebuilding engineering technical field, specifically a kind of WC-CBN nano coating and preparation method thereof.
Background technology
Manufacturing and refer to and junked-auto component, engineering machinery, lathe etc. are carried out specialized mass production process of repairing, then manufacture a product and reach the quality and performance identical with original new product, is the advanced form of recycling economy " recycling ".Compared with manufacture new product, then the escapable cost 50% that manufactures a product, energy-conservation 60%, material-saving 70%, produces solid waste hardly.So remanufacturing industry has a extensive future.
For old component, the normal method of spraying that uses sprays on the surface of corresponding part, and the performance of the component after spraying obtains further improvement, achieves recycling, thus avoids waste, provide cost savings.But existing coating also exists the problem that wear resistance is poor, erosion resistance is lower, and work-ing life is shorter, have influence on the normal use of matrix, and change matrix frequently and waste time and energy, repeatedly to reprocess cost higher, have influence on the productivity effect of factory.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of WC-CBN nano coating and preparation method thereof.
Technical problem to be solved by this invention realizes by the following technical solutions:
A kind of WC-CBN nano coating, comprise following component: WC, CBN, auxiliary agent and trace element, the mass percent shared by described each component is as follows:
WC is 21% ~ 40%, CBN is 57% ~ 76%, auxiliary agent be 2% and trace element be 1%.
Described trace element comprises Gr, C, Cr, Si, B, Fe.
Described auxiliary agent is CaF
2, because toughness of material is higher, hardness is slightly poor, so with the addition of auxiliary agent 2%CaF
2improve hardness, hardness can improve 44%, and toughness is greatly enhanced.
A kind of preparation method of WC-CBN nano coating; described step is: first adopt sol-gel method to add catalyzer again to WC, CBN material; obtained nanometer ball after sufficiently mixing; adopt again promoting agent protection method be mixed with trace element and auxiliary agent obtain nanometer powder, finally utilize plasma spraying equipment be sprayed on matrix surface formation coating.
The invention has the beneficial effects as follows: the invention solves the problem that conventional coatings wear resistance is poor, erosion resistance is lower, improve the microtexture of material surface coating, structure, coating hardness is made to improve 44%, toughness improves 80%, Young's modulus improves 8.5% ~ 14.4%, thus overall wear resisting property, the toughness improving material surface, also there is significant effect to the comprehensive mechanical property improving improvement simultaneously.
Embodiment
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below the present invention being set forth further.
Embodiment one:
A kind of WC-CBN nano coating, comprise following component: WC, CBN, auxiliary agent and trace element, the mass percent shared by described each component is as follows:
WC is 21%, CBN is 76%, auxiliary agent be 2% and trace element be 1%.
Described trace element comprises Gr, C, Cr, Si, B, Fe.
Described auxiliary agent is CaF
2.
A kind of preparation method of WC-CBN nano coating; described step is: first adopt sol-gel method to add catalyzer again to WC, CBN material; obtained nanometer ball after sufficiently mixing; adopt again promoting agent protection method be mixed with trace element and auxiliary agent obtain nanometer powder, finally utilize plasma spraying equipment be sprayed on matrix surface formation coating.
Embodiment two:
A kind of WC-CBN nano coating, comprise following component: WC, CBN, auxiliary agent and trace element, the mass percent shared by described each component is as follows:
WC40%, CBN57%, auxiliary agent 2% and trace element 1%.
Described trace element comprises Gr, C, Cr, Si, B, Fe.
Described auxiliary agent is CaF
2.
A kind of preparation method of WC-CBN nano coating is identical with embodiment one.
Embodiment three:
A kind of WC-CBN nano coating, comprise following component: WC, CBN, auxiliary agent and trace element, the mass percent shared by described each component is as follows:
WC30%, CBN67%, auxiliary agent 2% and trace element 1%.
Described trace element comprises Gr, C, Cr, Si, B, Fe.
Described auxiliary agent is CaF
2.
A kind of preparation method of WC-CBN nano coating is identical with embodiment one.
Embodiment four:
A kind of WC-CBN nano coating, comprise following component: WC, CBN, auxiliary agent and trace element, the mass percent shared by described each component is as follows:
WC35%, CBN62%, auxiliary agent 2% and trace element 1%.
Described trace element comprises Gr, C, Cr, Si, B, Fe.
Described auxiliary agent is CaF
2.
A kind of preparation method of WC-CBN nano coating is identical with embodiment one.
In order to prove actual effect of the present invention, the special plasma spray coating process that adopts has prepared WC-CBN coating on 3Cr2Mo die steel matrix.After embodiment one to embodiment four being implemented, test the bonding strength of coating, microhardness, void content and abrasive wear resistance.And utilize XRD to carry out Phase Structure Analysis to dusty spray Ji coating, by scanning electronic microscope, the coating morphology before and after dusty spray, abrasive wear is observed.
Experimental result is as follows:
| Numbering | Porosity (AREA%) | Bonding strength MPa | Microhardness (HV) |
| Embodiment one | 0.598 | 74.5 | 1256 |
| Embodiment two | 0.677 | 69.3 | 1389 |
| Embodiment three | 0.546 | 68.7 | 1159 |
| Embodiment four | 0.578 | 72.4 | 1421 |
| Mean value | 0.599 | 71.2 | 1306 |
| Comparative group | 0.825 | 60 | 799 |
Wherein, comparative group is not for having cated 3Cr2Mo matrix.
In addition, invention has been three groups of abrasion loss test experiments, often all test the abrasion loss in embodiment one to embodiment four in group experiment, average data added up, and contrast with comparative group, related data is as follows:
| Numbering | Mean value (g) before wearing and tearing | Mean value (g) after wearing and tearing | Abrasion loss mean value (mg) |
| Experiment 1 | 61.2365 | 61.2356 | 9 |
| Experiment 2 | 61.6547 | 61.6536 | 11 |
| Experiment 3 | 61.3654 | 61.3644 | 10 |
| Comparative group | 61.6547 | 61.6432 | 115 |
From above-mentioned experimental data, under identical experiment condition, the abrasion loss of 3Cr2Mo matrix is 11 times of WC-CBN coating, confirm that WC-CBN coating has good wear resistance, the present invention can make the hardness of WC-CBN coating reach HRC72 through the proportioning of different ratios, coat-thickness can reach 2 millimeters, and coating toughness, conjugation are high, improves the ulking thickness of coating.Show that the density of the bonding strength of WC-CBN coating, tissue is better through test of many times, coating density is at 9.74g/cm
3.This coated material is applicable to multiple steel such as: 5Cr4W5Mo2V, 6Cr4Mo3Ni2W, 4CrMnSiMoV, 5Cr2NiMoVSi etc.The nano material that the present invention relates to is better than conventional washcoat material, hardness is high, wear resistance good, bonding strength is high, high temperature resistant, corrosion-resistant, and by above-mentioned experimental data, indicate WC-CBN coating prepared by plasma spraying and there is excellent abrasive wear resistance, hardness and toughness.Having that fusing point is high, density is low and the characteristic such as coefficient of thermal expansion is little, is modern mechanical manufacturing and abrasion piece reparation important materials again.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not by the restriction of step embodiment; the just principle of the present invention described in step embodiment and specification sheets; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. a WC-CBN nano coating, is characterized in that: comprise following component: WC, CBN, auxiliary agent and trace element, and the mass percent shared by described each component is as follows:
WC is 21% ~ 40%, CBN is 57% ~ 76%, auxiliary agent be 2% and trace element be 1%.
2. a kind of WC-CBN nano coating according to claim 1, is characterized in that: described trace element comprises Gr, C, Cr, Si, B, Fe.
3. a kind of WC-CBN nano coating according to claim 1, is characterized in that: described auxiliary agent is CaF
2.
4. the preparation method of a WC-CBN nano coating; it is characterized in that: described step is: first adopt sol-gel method to add catalyzer again to WC, CBN material; obtained nanometer ball after sufficiently mixing; adopt again promoting agent protection method be mixed with trace element and auxiliary agent obtain nanometer powder, finally utilize plasma spraying equipment be sprayed on matrix surface formation coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410604534.5A CN104388883A (en) | 2014-10-30 | 2014-10-30 | WC-CBN nano-coating and preparation method thereof |
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| CN201410604534.5A CN104388883A (en) | 2014-10-30 | 2014-10-30 | WC-CBN nano-coating and preparation method thereof |
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| CN104388883A true CN104388883A (en) | 2015-03-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846309A (en) * | 2015-05-09 | 2015-08-19 | 安徽鼎恒再制造产业技术研究院有限公司 | High-strength Co3O4-SiC coating materials and preparation method thereof |
-
2014
- 2014-10-30 CN CN201410604534.5A patent/CN104388883A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846309A (en) * | 2015-05-09 | 2015-08-19 | 安徽鼎恒再制造产业技术研究院有限公司 | High-strength Co3O4-SiC coating materials and preparation method thereof |
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Application publication date: 20150304 |