CN103526135A - Fe-based metal glass composite coating enhanced by WC-Co as well as preparation method of the coating - Google Patents
Fe-based metal glass composite coating enhanced by WC-Co as well as preparation method of the coating Download PDFInfo
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Abstract
The invention provides a Fe-based metal glass composite coating enhanced by WC-Co as well as a preparation method of the coating. By volume, 10%-30% of WC-Co powder and 70%-90% of Fe-based amorphous powder are mixed evenly to obtain a mixture serving as a spraying material, and by virtue of a hypersonic flame spraying technology, the metal glass coating enhanced by a hard alloy is prepared on the surface of a part. Compared with the existing Fe-based amorphous coating, the Fe-based metal glass composite coating is higher in hardness, strength and wear-resisting performance. Compared with a WC-Co coating prepared by the same method, the Fe-based metal glass composite coating is similar in performance but much lower in cost. The Fe-based metal glass composite coating with excellent performance and low cost can be used for not only enhancing product performance during production of new products, but also repairing or re-manufacturing waste products, and has extensive application prospect.
Description
Technical field
Iron based metallic glass compound coating that a kind of WC-Co provided by the present invention strengthens and preparation method thereof, belong to field of surface engineering technique, particularly relate on steel-iron components surface and prepare wear-and corrosion-resistant coating technology, be applicable to the manufacture of various parts and repair manufacturing processed again.
Background technology
Along with the development of modern industry, to the surface property of mechanical component product, require more and more higher.Meanwhile, the update of technology has also brought scrapping in a large number of electronic product, in view of the dual-pressure of environment and resource, in the urgent need to developing green continuable circulation re-manufacturing technology.Hot-spraying techniques, by preparing coating at piece surface, can be improved product surface performance, simultaneously also can be for repairing the part due to wearing and tearing or corrosion failure, and be a kind of widespread use and still at fast-developing green sufacing.
Generally, metal and alloy are when solidifying, and atom is always transformed into ordered arrangement from the tangleweed of liquid, and crystallization becomes crystal.But if the setting rate of metal or alloy is very fast, just atom has little time that ordered arrangement is frozen has lived, final atomic arrangement mode is similar to liquid, is unordered, Here it is non-crystaline amorphous metal, is called again metallic glass.Fe base amorphous coating has higher hardness, intensity and good corrosion resisting property, is suitable for anticorrosion and wear-resisting field.Research at present shows, air plasma spraying (APS) and hypersonic flame spraying (HVOF) can be used for preparing Fe base amorphous coating, but coating prepared by the relative APS of coating prepared by HVOF is finer and close, and hardness, intensity and solidity to corrosion all increase.But compare with expensive WC-Co coating, the wear resistance of Fe base amorphous coating still still has some deficits, and can not meet some harsh abrasion environment, especially in metal to-metal contact environment.
In order to improve the performance of Fe base amorphous coating, the invention provides iron based metallic glass compound coating of a kind of WC-Co enhancing and preparation method thereof.The WC-Co powder of different ratios is mixed with Fe base amorphous powder, utilize hot-spraying techniques to be deposited on machinery part surface, can form the composition metal glass coating that a kind of sintering metal strengthens, greatly improved the wear resistance of single Fe base amorphous coating, thereby in the work-ing life that extends part, be with a wide range of applications.
Summary of the invention
In order further to improve the performance of Fe base amorphous coating, especially metal to-metal contact performance, the invention provides iron based metallic glass compound coating of a kind of WC-Co enhancing and preparation method thereof.Its object is to utilize hot-spraying techniques to prepare at piece surface the composition metal glass coating that a kind of sintering metal strengthens, and improves wear resistance and the preservative property of part, thereby extends the work-ing life of part.When this invention both can have been manufactured for product innovation, enhanced product performance, also can, for waste product manufacturing processed again, be with a wide range of applications.
Technical scheme of the present invention is as follows:
The iron based metallic glass compound coating strengthening, contains volume fraction and is 5～15% WC-Co particle and 85～95% Fe base noncrystal alloy in coating structure, WC-Co uniform particles discrete distribution is in coating.
The iron based metallic glass compound coating that WC-Co of the present invention strengthens, its preparation method comprises the steps:
A, WC-Co powder is evenly mixed with Fe base amorphous powder, mixed WC-Co powder volume mark accounts for 10～30% of total powder, and all the other are Fe base amorphous powder;
B, to needing the part of spray-on coating to carry out surface preparation, comprise with alcohol or acetone and clean wipe oil, then treat sprayed surface and carry out sandblast roughening treatment.；
C, utilize hypersonic flame spraying technology by the powder deposition mixing at piece surface.
Described Fe based amorphous alloy powder is to select gas atomization preparation, can own preparation also can buy, and granularity is 400-160 order, and powder shape is spherical shape, and smooth surface has good mobility.
Described WC-Co powder is selected the preparation of reunion sintering process, can own preparation also can buy, and metal Co is being coated WC particle, and form is spherical or subsphaeroidal, surface irregularity porous, and powder diameter is 15～45 μ m, the particle diameter of WC hard particles is 0.2～1 μ m.
The described preferred WC-12Co of WC-Co powder or WC-17Co powder.
Described surface preparation is: with alcohol or acetone, clean wipe oil, machining makes piece surface size rule to be sprayed, then treats sprayed surface and carries out sandblast roughening treatment with gravel.
Described supersonic flame hot-spraying techniques: preheating before spraying, utilizing the hydrocarbon of propane or propylene is combustion gas, and oxygen flow is 50～150L/min, and flow rate of propane gas is 10～25L/min, and spray distance is 200～350mm, uses pressure-air cooling after spray.
The iron based metallic glass compound coating that WC-Co provided by the invention strengthens, that to take even mixed WC-Co powder and Fe base amorphous powder be spray material, the metallic glass coating of utilizing Wimet that hypersonic flame spraying technique is prepared on piece surface to strengthen.The WC-Co powder of preparing due to reunion sintering process is vesicular structure, and Fe based amorphous alloy powder is solid construction, and in spraying and deposition process, WC-Co can be partly dissolved the base amorphous alloy coating into Fe, so contain the original feeding of the WC-Co powder of volume fraction 10%～30%, after being prepared into coating, the large appointment of the volume fraction of WC-Co reduces by half.The iron based metallic glass compound coating that WC-Co provided by the present invention strengthens is compared with current Fe base amorphous coating, and its hardness, intensity and wear resistance all increase.The WC-Co preparing with same procedure compares, and performance approaches, and cost but can reduce a lot.
In sum, the iron based metallic glass compound coating that a kind of WC-Co provided by the present invention strengthens, can overcome existing Fe base amorphous coating wear resistance deficiency and the high problem of WC-Co coating cost, by WC-12Co or WC-17Co powder are evenly mixed with Fe base amorphous powder, utilize hypersonic flame spraying technology by the powder deposition mixing at piece surface, the wear resistance of part and solidity to corrosion are improved greatly.In addition, coated material excellent performance provided by the present invention, with low cost, in the time of both can manufacturing for product innovation, enhance product performance, also can or manufacture again for the reparation of waste product, be with a wide range of applications.
Accompanying drawing explanation
Fig. 1 (a): 500 times of microscopic appearances (SEM) of Fe based amorphous alloy powder;
Fig. 1 (b): 3000 times of surface topographies (SEM) of Fe based amorphous alloy powder particle;
Fig. 2 (a): 500 times of microscopic appearances (SEM) of WC-Co powder;
Fig. 2 (b): 5000 times of surface topographies (SEM) of WC-Co powder particle;
Fig. 3: hypersonic flame spraying is prepared coating schematic diagram.
Embodiment
Iron based metallic glass compound coating that a kind of WC-Co provided by the present invention strengthens and preparation method thereof is mainly comprised of three steps: WC-Co powder is evenly mixed with Fe base amorphous powder, and two kinds of ratios corresponding to powder are followed successively by 10%～30% and 70%～90%; Part or matrix of samples surface are carried out to sandblasting and cleaning, and the sand particle diameter adopting is 16 order palm fibre corundum, after sandblast, with dehydrated alcohol, matrix surface is carried out to clean; Adopt supersonic flame hot-spraying techniques to prepare at matrix surface the iron based metallic glass compound coating that WC-Co strengthens, preheating before spraying, utilizing the hydrocarbon of propane or propylene is combustion gas, oxygen flow is 50～150L/min, flow rate of propane gas is 10～25L/min, spray distance is 200～350mm, uses pressure-air cooling after spray.
Described Fe based amorphous alloy powder is prepared with gas atomization, its composition and mass percent are Mo (1～3%), Cr (5～7%), Ni (1～3%), P (9～11%) and Si (2～4%), surplus is Fe, its granularity is 400-160 order, powder shape is spherical shape, smooth surface, has good mobility.
Fig. 1 is Fe based amorphous alloy powder stereoscan photograph (SEM).Wherein, Fig. 1 (a) is 500 times of microscopic appearances (SEM) of Fe based amorphous alloy powder, can find out that its granularity is 400-160 order, and powder shape major part is spherical shape, is on a small quantity ellipsoid shape; Fig. 1 (b) is 3000 times of surface topographies of Fe based amorphous alloy powder particle, can find out its smooth surface, has good mobility; This powder particle size and shape is applicable to hypersonic flame spraying requirement.
Fig. 2 is the stereoscan photograph (SEM) of WC-12Co powder.Wherein, Fig. 2 (a) is 500 times of microscopic appearances (SEM) of WC-Co powder, the particle diameter that can find out WC-Co powder is 15～45 μ m, by reunion sintering process, prepare, metal Co is being coated WC particle, and the particle diameter of WC hard particles is 0.1～1 μ m, belongs to sub-micron powder, narrow particle size distribution, good fluidity; Fig. 2 (b) is 5000 times of surface topographies (SEM) of WC-Co powder particle, can find out that WC-Co powder morphology is spherical or subsphaeroidal, surface irregularity porous.
Described hypersonic flame spraying schematic diagram as shown in Figure 3.Hypersonic flame spraying is that oxygen and combustion gas are mixed in combustion chamber and ignited, by Laval-cavity nozzle, accelerating to form high speed flame flows, mixed powder is injected to spray gun follows flame stream and is heated rapidly, accelerate to supersonic velocity state simultaneously, then the pretreated part of high-speed impact or sample substrate surface, and at substrate surface, sprawl quenching and form the iron based metallic glass compound coating that WC-Co firmly strengthens, thereby make part be obtained the high performance such as corrosion-resistant and wear-resistant by sprayed surface.The WC-Co powder of preparing due to reunion sintering process is vesicular structure, and Fe based amorphous alloy powder is solid construction, and in spraying and deposition process, WC-Co can be partly dissolved the base amorphous alloy coating into Fe, so contain the original feeding of the WC-Co powder of volume fraction 10%～30%, after being prepared into coating, the large appointment of the volume fraction of WC-Co reduces by half.Illustrate by the following examples the preparation process of this compound coating.
Embodiment 1:
Take the WC-12Co powder of volume fraction 10% and the Fe base amorphous powder of volume fraction 90% is raw material, after evenly mixing, puts into powder feeder, by high pressure (air pressure 0.7Mpa) nitrogen, is sent in the spray gun of supersonic spray coating equipment.Spray parameters is set as: propane air pressure 0.65MPa, and propane flow 15L/min, oxygen pneumatic 0.7MPa, oxygen flow 100L/min, is coated with apart from 275mm; Before spraying, to substrate preheating to 200 ℃, spray rear pressure-air cooling.Body material Q235 steel, specimen size to be sprayed is 80 * 50 * 5mm.In prepared coating, it is 5% that WC-12Co volume fraction accounts for, and all the other are Fe base amorphous component.Finally by crossing test, its intensity>=60MPa, hardness 700HV
0.1～850HV
0.1, to when mill, wear rate is about under similarity condition and prepares 63% of pure iron base metal glass coating with GCr15 bearing steel, and the more simple iron based metallic glass coating of its property indices all makes moderate progress.
Embodiment 2:
Take the WC-17Co powder of volume fraction 15% and the Fe base amorphous powder of volume fraction 85% is raw material, after evenly mixing, puts into powder feeder, by high pressure (air pressure 0.7Mpa) nitrogen, is sent in the spray gun of supersonic spray coating equipment.Spray parameters is set as: propane air pressure 0.65MPa, and propane flow 15L/min, oxygen pneumatic 0.7MPa, oxygen flow 100L/min, is coated with apart from 275mm; Before spraying, to substrate preheating to 200 ℃, spray rear pressure-air cooling.Body material Q235 steel, specimen size to be sprayed is 80 * 50 * 5mm.In prepared coating, it is 7% that WC-17Co volume fraction accounts for, and all the other are Fe base amorphous component.Finally by crossing test, its intensity>=60MPa, hardness 750HV
0.1～850HV
0.1, to when mill, wear rate is about under similarity condition and prepares 50% of pure iron base metal glass coating with GCr15 bearing steel, and the more simple iron based metallic glass coating of its property indices all makes moderate progress.
Embodiment 3:
Take the WC-12Co powder of volume fraction 20% and the Fe base amorphous powder of volume fraction 80% is raw material, after evenly mixing, puts into powder feeder, by high pressure (air pressure 0.7MPa) nitrogen, is sent in the spray gun of supersonic spray coating equipment.Spray parameters is set as: propane air pressure 0.65MPa, and propane flow 17L/min, oxygen pneumatic 0.7MPa, oxygen flow 120L/min, is coated with apart from 300mm; Before spraying, to substrate preheating to 200 ℃, spray rear pressure-air cooling.Body material Q235 steel, specimen size to be sprayed is 80 * 50 * 5mm.In prepared coating, it is 10% that WC-12Co volume fraction accounts for, and all the other are Fe base amorphous component.Finally by crossing test, its intensity>=60MPa, hardness 850HV
0.1～950HV
0.1, to when mill, wear rate is about under similarity condition and prepares 42% of pure iron base metal glass coating with GCr15 bearing steel, and its properties is significantly better than simple iron based metallic glass coating.
Embodiment 4:
Take the WC-17Co powder of volume fraction 20% and the Fe base amorphous powder of volume fraction 80% is raw material, after evenly mixing, puts into powder feeder, by high pressure (air pressure 0.7MPa) nitrogen, is sent in the spray gun of supersonic spray coating equipment.Spray parameters is set as: propane air pressure 0.65MPa, and propane flow 17L/min, oxygen pneumatic 0.7MPa, oxygen flow 120L/min, is coated with apart from 300mm; Before spraying, to substrate preheating to 200 ℃, spray rear pressure-air cooling.Body material Q235 steel, specimen size to be sprayed is 80 * 50 * 5mm.In prepared coating, it is 9% that WC-17Co volume fraction accounts for, and all the other are Fe base amorphous component.Finally by crossing test, its intensity>=60MPa, hardness 800HV
0.1～920HV
0.1, to when mill, wear rate is about under similarity condition and prepares 36% of pure iron base metal glass coating with GCr15 bearing steel, and its properties is significantly better than simple iron based metallic glass coating.
Embodiment 5:
Take the WC-12Co powder of volume fraction 30% and the Fe base amorphous powder of volume fraction 70% is raw material, after evenly mixing, puts into powder feeder, by high pressure (air pressure 0.7MPa) nitrogen, is sent in the spray gun of supersonic spray coating equipment.Spray parameters is set as: propane air pressure 0.65MPa, and propane flow 17L/min, oxygen pneumatic 0.7MPa, oxygen flow 120L/min, is coated with apart from 300mm; Before spraying, to substrate preheating to 200 ℃, spray rear pressure-air cooling.Body material Q235 steel, specimen size to be sprayed is 80 * 50 * 5mm.In prepared coating, it is 15% that WC-12Co volume fraction accounts for, and all the other are Fe base amorphous component.Finally by crossing test, its intensity>=60MPa, hardness 900HV
0.1～1100HV
0.1, to when mill, wear rate is about under similarity condition and prepares 28% of pure iron base metal glass coating with GCr15 bearing steel, and its properties is significantly better than simple iron based metallic glass coating.
As mentioned above, iron based metallic glass compound coating due to the WC-Co enhancing providing of the present invention, a certain amount of WC-Co powder is incorporated in Fe base amorphous powder, thereby greatly improved the performance of Fe base amorphous coating, and compare with WC-Co hard alloy coating, performance is approaching, and but cost is a lot.In addition, the introducing of WC particle is conducive to improve the wear resisting property of coating under high-load, is conducive to meet the active demands of field to superhard tough wear-resistant coating such as heavily loaded, height weares and teares, impact that the walking type construction machinery of being on active service under bad working environments is manufactured again.
By the description of the drawings and corresponding embodiment, the present invention has been described as mentioned above.But it should be understood that the present invention is not limited to above-mentioned embodiment, above-mentioned embodiment is only schematically, rather than restrictive.Those of ordinary skill in the art, under enlightenment of the present invention, within not departing from the scope that aim of the present invention and claim protect, can change WC-Co powder mixture ratio and spray parameters according to practical situation, and these are all within protection of the present invention.Wherein, in an embodiment about the description of size, type and the material category of sample or test specimen and do not mean that and limit the invention to particular forms disclosed, this programme is only open in the mode of example, unless otherwise specified.
Claims (5)
1. the iron based metallic glass compound coating that WC-Co strengthens, is characterized in that containing in coating structure volume fraction and is 5～15% WC-Co particle and 85～95% Fe base noncrystal alloy, and WC-Co uniform particles discrete distribution is in coating.
2. the preparation method of compound coating as claimed in claim 1, is characterized in that step is as follows:
A, WC-Co powder is evenly mixed with Fe base amorphous powder, mixed WC-Co powder volume mark accounts for 10～30% of total powder, and all the other are Fe base amorphous powder;
B, to needing the part of spray-on coating to carry out for surface alcohol or acetone cleans wipe oil, then treat sprayed surface and carry out sandblast roughening treatment;
C, utilize hypersonic flame spraying technology by the powder deposition mixing at piece surface.
3. method as claimed in claim 2, is characterized in that described Fe based amorphous alloy powder granularity is 400-160 order, and powder shape is spherical shape.
4. method as claimed in claim 2, is characterized in that described WC-Co powder is WC-12Co or WC-17Co powder, and form is spherical or subsphaeroidal, metal Co is being coated WC particle, surface irregularity porous, powder diameter is 15～45 μ m, the particle diameter of WC hard particles is 0.2～1 μ m.
5. method as claimed in claim 2, it is characterized in that described supersonic flame hot-spraying techniques: preheating before spraying, utilizing the hydrocarbon of propane or propylene is combustion gas, oxygen flow is 50～150L/min, flow rate of propane gas is 10～25L/min, spray distance is 200～350mm, uses pressure-air cooling after spray.
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| CN103614687A (en) * | 2013-11-22 | 2014-03-05 | 西峡龙成特种材料有限公司 | Preparation technique of continuous casting crystallizer copper plate surface cermet coating |
| CN105256269A (en) * | 2015-11-11 | 2016-01-20 | 无锡清杨机械制造有限公司 | Spraying method |
| CN107130201A (en) * | 2017-03-30 | 2017-09-05 | 芜湖点金机电科技有限公司 | A kind of preparation method of corrosion-resistant amorphous WC composite coatings |
| CN108977753A (en) * | 2018-07-11 | 2018-12-11 | 吴长龙 | A kind of preparation method of amorphous coating |
| CN109652753A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
| CN109652755A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
| US10308999B2 (en) | 2015-12-03 | 2019-06-04 | Industrial Technology Research Institute | Iron-based alloy coating and method for manufacturing the same |
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| CN113684440A (en) * | 2021-07-23 | 2021-11-23 | 华南理工大学 | Molybdenum-doped composite coating and preparation method thereof |
| CN114945389A (en) * | 2020-01-16 | 2022-08-26 | 可隆工业株式会社 | Amorphous metal porous body and method for producing same |
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| CN103614687A (en) * | 2013-11-22 | 2014-03-05 | 西峡龙成特种材料有限公司 | Preparation technique of continuous casting crystallizer copper plate surface cermet coating |
| CN103614687B (en) * | 2013-11-22 | 2016-04-27 | 西峡龙成特种材料有限公司 | A kind of preparation technology of continuous casting crystallizer copper plate surface cermet coating |
| CN105256269A (en) * | 2015-11-11 | 2016-01-20 | 无锡清杨机械制造有限公司 | Spraying method |
| US10308999B2 (en) | 2015-12-03 | 2019-06-04 | Industrial Technology Research Institute | Iron-based alloy coating and method for manufacturing the same |
| CN107130201A (en) * | 2017-03-30 | 2017-09-05 | 芜湖点金机电科技有限公司 | A kind of preparation method of corrosion-resistant amorphous WC composite coatings |
| CN108977753A (en) * | 2018-07-11 | 2018-12-11 | 吴长龙 | A kind of preparation method of amorphous coating |
| CN109652753A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
| CN109652755A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
| CN114945389A (en) * | 2020-01-16 | 2022-08-26 | 可隆工业株式会社 | Amorphous metal porous body and method for producing same |
| CN112831203A (en) * | 2021-02-04 | 2021-05-25 | 常州爱克普换热器有限公司 | Powder for corrosion-resistant spraying of aluminum plate fin type heat exchanger fin and preparation method thereof |
| CN113684440A (en) * | 2021-07-23 | 2021-11-23 | 华南理工大学 | Molybdenum-doped composite coating and preparation method thereof |
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Application publication date: 20140122 |