CN115651518B - Surface protection coating for wind power castings and preparation method thereof - Google Patents
Surface protection coating for wind power castings and preparation method thereof Download PDFInfo
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- CN115651518B CN115651518B CN202211421653.8A CN202211421653A CN115651518B CN 115651518 B CN115651518 B CN 115651518B CN 202211421653 A CN202211421653 A CN 202211421653A CN 115651518 B CN115651518 B CN 115651518B
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- 238000000576 coating method Methods 0.000 title claims abstract description 35
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 127
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims abstract description 28
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000011253 protective coating Substances 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 52
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 46
- 239000000843 powder Substances 0.000 claims description 35
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 30
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 30
- 239000004814 polyurethane Substances 0.000 claims description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 28
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 28
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 28
- 229920002635 polyurethane Polymers 0.000 claims description 27
- -1 polydimethylsiloxane Polymers 0.000 claims description 26
- 239000005543 nano-size silicon particle Substances 0.000 claims description 25
- 235000012239 silicon dioxide Nutrition 0.000 claims description 25
- 238000004372 laser cladding Methods 0.000 claims description 20
- 238000000498 ball milling Methods 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 14
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- 238000009210 therapy by ultrasound Methods 0.000 claims description 10
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- 238000001035 drying Methods 0.000 claims description 3
- 238000007590 electrostatic spraying Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 7
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- 239000002131 composite material Substances 0.000 abstract description 5
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910021344 molybdenum silicide Inorganic materials 0.000 abstract description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 210000001595 mastoid Anatomy 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
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- 229910052709 silver Inorganic materials 0.000 description 2
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- 241001116468 Cunninghamia Species 0.000 description 1
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Wind Motors (AREA)
Abstract
The invention discloses a surface protective coating for wind power castings and a preparation method thereof. The invention can effectively strengthen the wear resistance, reduce the wear condition of the fan casting in the use process, and effectively improve the water contact angle of the surface of the wind power casting, thereby enhancing the hydrophobic property of the surface of the wind power casting and improving the self-cleaning property of the surface of the wind power casting; the base material A forms a first layer of protection on the surface of the wind power casting, so that the surface hardness and wear resistance of the wind power casting can be effectively enhanced, the base material B forms a second layer of protection on the surface of the wind power casting, a heavy hydrophobic protection treatment can be added on the basis of the first layer of protection, and the self-cleaning performance of the surface of the wind power casting can be effectively enhanced; silicon powder, titanium powder and molybdenum powder in the base material A are added to enable hard phases of silicon carbide, titanium carbide and molybdenum silicide to appear in the coating; the base material B is prepared into a composite coating with superhydrophobicity and high hardness on the surface of a wind power casting.
Description
Technical Field
The invention relates to the technical field of wind power casting coatings, in particular to a surface protective coating for a wind power casting and a preparation method thereof.
Background
Wind power (wind power) generally refers to wind power generation; wind power generation means converting kinetic energy of wind into electric energy; the wind power casting is one of main parts of the fan and mainly comprises a hub, a base, a shaft, a bearing seat, a beam, a gear box part (mainly comprising a gear box body, a torque arm and a planet carrier) and the like. The cast iron subjected to graphite spheroidization retains basic components, technological properties and various advantages of common cast iron, and meanwhile, the plasticity and toughness of the cast iron are changed, and the mechanical properties of the cast iron are similar to those of steel; the spherical graphite reduces the weight of unit strength, which increases the freedom degree of the shape design of the parts, so that the iron casting has the basis of wide industrial application; ductile iron castings are applied to various fields such as wind power, general machinery, ocean engineering, rail transit and the like; due to the working environment of the wind power casting, protective paint is arranged on the surface of the wind power casting and is used for protecting the wind power casting.
The existing protective coating for the surface of the wind power casting is poor in hardness, easy to wear and poor in surface self-cleaning performance.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a surface protective coating for wind power castings and a preparation method thereof.
The surface protection coating for the wind power casting comprises a base material A and a base material B, wherein the base material B is arranged on the outer side of the base material A; the weight ratio of the base material A to the wind power casting is 1:100-120; the weight ratio of the base material B to the base material A is 1:2-4.
Further, the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3 to 5.3 percent of polydimethylsiloxane, 30 to 32 percent of titanium carbide, 16 to 18 percent of nano silicon dioxide, 3.6 to 4.6 percent of ethanol and the balance of polyurethane.
Further, the weight ratio of the base material A to the wind power casting is 1:100; the weight ratio of the base material B to the base material A is 1:2; the base material A comprises the following components in percentage by weight: 23% of ferric oxide powder, 1.6% of silicon powder, 1.4% of titanium powder, 1.6% of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3% of polydimethylsiloxane, 30% of titanium carbide, 16% of nano silicon dioxide, 3.6% of ethanol and the balance of polyurethane.
Further, the weight ratio of the base material A to the wind power casting is 1:120; the weight ratio of the base material B to the base material A is 1:4; the base material A comprises the following components in percentage by weight: 25% of ferric oxide powder, 2.6% of silicon powder, 2.4% of titanium powder, 2.6% of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 5.3% of polydimethylsiloxane, 32% of titanium carbide, 18% of nano silicon dioxide, 4.6% of ethanol and the balance of polyurethane.
Further, the weight ratio of the base material A to the wind power casting is 1:110; the weight ratio of the base material B to the base material A is 1:3; the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3 to 5.3 percent of polydimethylsiloxane, 30 to 32 percent of titanium carbide, 16 to 18 percent of nano silicon dioxide, 3.6 to 4.6 percent of ethanol and the balance of polyurethane.
The preparation method of the surface protective coating for the wind power casting comprises the following specific preparation steps:
step one: weighing ferric oxide powder, silicon powder, titanium powder, molybdenum powder and aluminum powder in the base material A, and polydimethylsiloxane, titanium carbide, nano silicon dioxide, ethanol and polyurethane in the base material B;
step two: carrying out blending ball milling treatment on the ferric oxide powder, the silicon powder, the titanium powder, the molybdenum powder and the aluminum powder in the first step for 70-90 minutes to obtain a base material A;
step three: mixing polydimethylsiloxane, ethanol and polyurethane in the first step, performing ultrasonic treatment in a water bath for 60-80 minutes to obtain a mixture, adding titanium carbide and nano silicon dioxide in the first step into the mixture, and continuing the ultrasonic treatment in the water bath for 40-60 minutes to obtain a base material B;
step four: performing laser cladding treatment on the surface of the wind power casting by using the base material A in the second step to prepare a laser cladding layer on the surface of the wind power casting;
step five: and C, uniformly spraying the base material B in the step three on the surface of the laser cladding layer in an electrostatic spraying mode, and drying and curing to form the protective coating on the surface of the wind power casting.
Further, in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotation speed is 510-590 r/min, and the rotation speed is 1020-1180 r/min; in the third step, the water bath temperature is 40-60 ℃, the ultrasonic frequency is 60-80 KHz, and the ultrasonic power is 900-1000W; in the fourth step, in the laser cladding process, the scanning speed is 6-8 mm/s, the defocusing amount is 1-3 mm, the light spot diameter is 4-6 mm, the powder feeding speed is 16-18 g/min, the laser power is 1.5-1.7 KW, and the lap joint amount is 40-50
The%; in the fifth step, the electrostatic high voltage is 65-75 KV, the electrostatic current is 15-17 uA, the flow speed pressure is 0.40-0.50 mpa, the distance between a spray gun opening and a workpiece is 200-260 mm, and the spraying angle is 60-90 degrees.
Further, in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotating speed is 510r/min, and the rotation rotating speed is 1020r/min; in the third step, the water bath temperature is 40 ℃, the ultrasonic frequency is 60KHz, and the ultrasonic power is 900W; in the fourth step, in the laser cladding process, the scanning speed is 6mm/s, the defocusing amount is 1mm, the light spot diameter is 4mm, the powder feeding speed is 16g/min, the laser power is 1.5KW, and the lap joint amount is 40%; in the fifth step, the electrostatic high voltage is 65KV, the electrostatic current is 15uA, the flow speed pressure is 0.40mpa, the distance from a spray gun opening to a workpiece is 200mm, and the spraying angle is 60 degrees.
Further, in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotation speed is 590r/min, and the rotation speed is 1180r/min; in the third step, the water bath temperature is 60 ℃, the ultrasonic frequency is 80KHz, and the ultrasonic power is 1000W; in the fourth step, in the laser cladding process, the scanning speed is 8mm/s, the defocusing amount is 3mm, the light spot diameter is 6mm, the powder feeding speed is 18g/min, the laser power is 1.7KW, and the lap joint amount is 50%; in the fifth step, the electrostatic high voltage is 75KV, the electrostatic current is 17uA, the flow speed pressure is 0.50mpa, the distance between a spray gun opening and a workpiece is 260mm, and the spraying angle is 90 degrees.
Further, in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotating speed is 550r/min, and the rotation rotating speed is 1100r/min; in the third step, the water bath temperature is 50 ℃, the ultrasonic frequency is 70KHz, and the ultrasonic power is 950W; in the fourth step, in the laser cladding process, the scanning speed is 7mm/s, the defocusing amount is 2mm, the light spot diameter is 5mm, the powder feeding speed is 17g/min, the laser power is 1.6KW, and the lap joint amount is 45%; in the fifth step, the electrostatic high voltage is 70KV, the electrostatic current is 16uA, the flow speed pressure is 0.45mpa, the distance from a spray gun opening to a workpiece is 230mm, and the spraying angle is 75 degrees.
The invention has the technical effects and advantages that:
1. the surface protective coating for the wind power castings, which is prepared by adopting the raw material formula, can effectively strengthen the wear resistance, reduce the wear condition of the wind power castings in the use process, and simultaneously effectively improve the water contact angle of the surfaces of the wind power castings, further strengthen the hydrophobic property of the surfaces of the wind power castings and improve the self-cleaning property of the surfaces of the wind power castings; the base material A forms a first layer of protection on the surface of the wind power casting, so that the surface hardness and wear resistance of the wind power casting can be effectively enhanced, the base material B forms a second layer of protection on the surface of the wind power casting, a heavy hydrophobic protection treatment can be added on the basis of the first layer of protection, and the self-cleaning performance of the surface of the wind power casting can be effectively enhanced; the ferric oxide in the base material A reacts with aluminum powder to form iron and aluminum oxide, so that the rapid forming of the first layer of protection can be effectively ensured; silicon powder, titanium powder and molybdenum powder in the base material A are added into ferric oxide and aluminum powder, so that silicon carbide, titanium carbide and molybdenum silicide hard phases appear in the coating, the reaction is more complete, the bonding strength, hardness, fracture toughness and friction performance of the first layer of protection are all improved, and meanwhile, the porosity of the first layer of protection can be reduced; the titanium carbide is used as a hardness supplement in the base material B, the nano silicon dioxide is used as a micro-nano structure modifier, the Polydimethylsiloxane (PDMS) modified Polyurethane (PU) is used as an adhesive, a composite coating with super-hydrophobicity and high hardness is prepared on the surface of a wind power casting, the surface of the coating is regular, the filler is uniformly dispersed, and an obvious mastoid micro-nano rough structure can be formed on the surface of the coating, so that the coating has outstanding super-hydrophobicity; the PDMS modified PU is used as a resin matrix, so that a certain polar group is reserved on the basis of low surface energy characteristic of the coating, and the coating has good hydrophobic property and good mechanical property; the nano silicon dioxide is used as a micro-nano structure modifier to construct a micro-nano rough structure on the surface of the coating, so that the gas-liquid interface on the surface of the coating can be enhanced;
2. according to the invention, the ferric oxide powder, the silicon powder, the titanium powder, the molybdenum powder and the aluminum powder are subjected to blending ball milling treatment, so that the mixing and compounding treatment effect of the base material A can be effectively enhanced, and the structural uniformity and stability of the subsequent first layer protection are ensured; the polydimethylsiloxane, the ethanol and the polyurethane are subjected to blending water bath ultrasonic treatment, so that the surface modification treatment of the polydimethylsiloxane on the polyurethane can be effectively ensured; then adding titanium carbide and nano silicon dioxide for water bath ultrasonic treatment, so that the mixed composite treatment effect of the base material A can be effectively enhanced, and the structural uniformity and stability of the subsequent second-layer protection are ensured; the base material A is laser-clad on the surface of the wind power casting, so that the rapid forming of the first layer of protection can be effectively ensured; and the base material B is sprayed on the surface of the first layer of protection, a second layer of protection is formed outside the first layer of protection, and the protection treatment effect on the wind power casting can be further enhanced by the double-layer protection.
Detailed Description
The following description will clearly and fully describe the technical solutions of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the invention provides a surface protective coating for wind power castings, which comprises a base material A and a base material B, wherein the base material B is arranged on the outer side of the base material A; the weight ratio of the base material A to the wind power casting is 1:100; the weight ratio of the base material B to the base material A is 1:2; the base material A comprises the following components in percentage by weight: 23% of ferric oxide powder, 1.6% of silicon powder, 1.4% of titanium powder, 1.6% of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3% of polydimethylsiloxane, 30% of titanium carbide, 16% of nano silicon dioxide, 3.6% of ethanol and the balance of polyurethane;
the invention also provides a preparation method of the surface protective coating for the wind power casting, which comprises the following specific preparation steps:
step one: weighing ferric oxide powder, silicon powder, titanium powder, molybdenum powder and aluminum powder in the base material A, and polydimethylsiloxane, titanium carbide, nano silicon dioxide, ethanol and polyurethane in the base material B;
step two: carrying out blending ball milling on the ferric oxide powder, the silicon powder, the titanium powder, the molybdenum powder and the aluminum powder in the first step for 80 minutes to obtain a base material A;
step three: mixing polydimethylsiloxane, ethanol and polyurethane in the first step, performing water bath ultrasonic treatment for 70 minutes to obtain a mixture, adding titanium carbide and nano silicon dioxide in the first step into the mixture, and continuing the water bath ultrasonic treatment for 50 minutes to obtain a base material B;
step four: performing laser cladding treatment on the surface of the wind power casting by using the base material A in the second step to prepare a laser cladding layer on the surface of the wind power casting;
step five: and C, uniformly spraying the base material B in the step three on the surface of the laser cladding layer in an electrostatic spraying mode, and drying and curing to form the protective coating on the surface of the wind power casting.
In the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotating speed is 510r/min, and the rotation rotating speed is 1020r/min; in the third step, the water bath temperature is 40 ℃, the ultrasonic frequency is 60KHz, and the ultrasonic power is 900W; in the fourth step, in the laser cladding process, the scanning speed is 6mm/s, the defocusing amount is 1mm, the light spot diameter is 4mm, the powder feeding speed is 16g/min, the laser power is 1.5KW, and the lap joint amount is 40%; in the fifth step, the electrostatic high voltage is 65KV, the electrostatic current is 15uA, the flow speed pressure is 0.40mpa, the distance from a spray gun opening to a workpiece is 200mm, and the spraying angle is 60 degrees.
Example 2:
unlike example 1, the weight ratio of base A to wind casting is 1:120; the weight ratio of the base material B to the base material A is 1:4; the base material A comprises the following components in percentage by weight: 25% of ferric oxide powder, 2.6% of silicon powder, 2.4% of titanium powder, 2.6% of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 5.3% of polydimethylsiloxane, 32% of titanium carbide, 18% of nano silicon dioxide, 4.6% of ethanol and the balance of polyurethane.
Example 3:
unlike in all examples 1-2, the weight ratio of the base A to the wind power casting is 1:110; the weight ratio of the base material B to the base material A is 1:3; the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3 to 5.3 percent of polydimethylsiloxane, 30 to 32 percent of titanium carbide, 16 to 18 percent of nano silicon dioxide, 3.6 to 4.6 percent of ethanol and the balance of polyurethane.
Example 4:
unlike example 3, in the second step, ball milling was performed by using a planetary ball mill, the revolution rotation speed was 590r/min, and the rotation speed was 1180r/min; in the third step, the water bath temperature is 60 ℃, the ultrasonic frequency is 80KHz, and the ultrasonic power is 1000W; in the fourth step, in the laser cladding process, the scanning speed is 8mm/s, the defocusing amount is 3mm, the light spot diameter is 6mm, the powder feeding speed is 18g/min, the laser power is 1.7KW, and the lap joint amount is 50%; in the fifth step, the electrostatic high voltage is 75KV, the electrostatic current is 17uA, the flow speed pressure is 0.50mpa, the distance between a spray gun opening and a workpiece is 260mm, and the spraying angle is 90 degrees.
Example 5:
unlike example 3, in the second step, ball milling was performed using a planetary ball mill, the revolution rotation speed was 550r/min, and the rotation speed was 1100r/min; in the third step, the water bath temperature is 50 ℃, the ultrasonic frequency is 70KHz, and the ultrasonic power is 950W; in the fourth step, in the laser cladding process, the scanning speed is 7mm/s, the defocusing amount is 2mm, the light spot diameter is 5mm, the powder feeding speed is 17g/min, the laser power is 1.6KW, and the lap joint amount is 45%; in the fifth step, the electrostatic high voltage is 70KV, the electrostatic current is 16uA, the flow speed pressure is 0.45mpa, the distance from a spray gun opening to a workpiece is 230mm, and the spraying angle is 75 degrees.
Comparative example 1:
unlike example 3, the following is: the weight ratio of the base material A to the wind power casting is 1:110; the weight ratio of the base material B to the base material A is 1:3; the base material A comprises the following components in percentage by weight: 23-25% of ferric oxide powder, and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3 to 5.3 percent of polydimethylsiloxane, 30 to 32 percent of titanium carbide, 16 to 18 percent of nano silicon dioxide, 3.6 to 4.6 percent of ethanol and the balance of polyurethane.
Comparative example 2:
unlike example 3, the following is: the weight ratio of the base material A to the wind power casting is 1:110; the weight ratio of the base material B to the base material A is 1:3; the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 30-32% of titanium carbide, 16-18% of nano silicon dioxide, 3.6-4.6% of ethanol and the balance of polyurethane.
Comparative example 3:
unlike example 3, the following is: the weight ratio of the base material A to the wind power casting is 1:110; the weight ratio of the base material B to the base material A is 1:3; the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3 to 5.3 percent of polydimethylsiloxane, 30 to 32 percent of titanium carbide, 3.6 to 4.6 percent of ethanol and the balance of polyurethane.
Comparative example 4:
unlike example 5, the following is: the surface protective coating for the wind power casting comprises a base material A, wherein the weight ratio of the base material A to the wind power casting is 1:110; the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder.
The following steps: the ferric oxide powder is purchased from Andi metal materials limited company, qinghai county, product number 002355, particle size: 100nm; silicon powder is purchased from Hebei Yirui alloy welding material limited company, and the granularity is 15-45um; titanium powder is purchased from Hebei silver Bai alloy welding materials limited company and 325 meshes; molybdenum powder is purchased from Hebei silver Bai alloy welding material limited company, 300 meshes; polydimethylsiloxane was purchased from sigma aldrich (Shanghai) trade company, cat: 469319; titanium carbide was purchased from sigma aldrich (Shanghai) trade company, cat No.: 636967; nano silica was purchased from Hubei Tuobang chemical Co., ltd., product number: TB14662; polyurethane is purchased from Dongguan Cunninghamia plastic raw material limited company, trade mark 5377A; aluminum powder was purchased from Hebei Hua Ding alloy welding materials Co., ltd., product number: HZ-Al-2; ethanol procurement was from the company, hunan Xindu chemical industry Co., ltd., product number: 616-38-6.
The surface protection coating for the wind power castings in the comparative examples and the examples is subjected to detection treatment, a multifunctional friction and wear tester (CETR brand, model UMT-3) is used for testing the friction performance of the surface protection coating for the wind power castings prepared in the examples and the comparative examples at the temperature of 60 ℃, and the dual materials are Al2O3 bearing balls with the diameter of 6.0mm and the hardness of RC=62, the load is 5N, the frequency is 5Hz and the test time is 6h; the surface protective coating for the wind power castings is measured by using a sandisding (SDC-200 SH) water contact angle tester according to the GB/T30693-2014 standard; the test results are shown in Table one:
table one:
| wear rate (10) -16 m 3 /N·m) | Water contact angle (°) | |
| Comparative example 1 | 4.56 | 148 |
| Comparative example 2 | 4.34 | 128 |
| Comparative example 3 | 3.91 | 143 |
| Comparative example 4 | 5.78 | 151 |
| Example 1 | 1.95 | 150 |
| Example 2 | 1.93 | 150 |
| Example 3 | 1.45 | 151 |
| Example 4 | 1.48 | 150 |
| Example 5 | 1.35 | 151 |
From the above table, it can be seen that: the surface protective coating for the wind power casting can effectively strengthen the wear resistance, reduce the wear condition of the wind power casting in the use process, and effectively improve the water contact angle of the surface of the wind power casting, so as to further strengthen the hydrophobicity of the surface of the wind power casting and improve the self-cleaning performance of the surface of the wind power casting.
According to the invention, the base material A forms a first layer of protection on the surface of the wind power casting, so that the surface hardness and wear resistance of the wind power casting can be effectively enhanced, the base material B forms a second layer of protection on the surface of the wind power casting, and a heavy hydrophobic protection treatment can be added on the basis of the first layer of protection, so that the self-cleaning performance of the surface of the wind power casting can be effectively enhanced; the ferric oxide in the base material A reacts with aluminum powder to form iron and aluminum oxide, so that the rapid forming of the first layer of protection can be effectively ensured; silicon powder, titanium powder and molybdenum powder in the base material A are added into ferric oxide and aluminum powder, so that silicon carbide, titanium carbide and molybdenum silicide hard phases appear in the coating, the reaction is more complete, the bonding strength, hardness, fracture toughness and friction performance of the first layer of protection are all improved, and meanwhile, the porosity of the first layer of protection can be reduced; the titanium carbide is used as a hardness supplement in the base material B, the nano silicon dioxide is used as a micro-nano structure modifier, the Polydimethylsiloxane (PDMS) modified Polyurethane (PU) is used as an adhesive, a composite coating with super-hydrophobicity and high hardness is prepared on the surface of a wind power casting, the surface of the coating is regular, the filler is uniformly dispersed, and an obvious mastoid micro-nano rough structure can be formed on the surface of the coating, so that the coating has outstanding super-hydrophobicity; the PDMS modified PU is used as a resin matrix, so that a certain polar group is reserved on the basis of low surface energy characteristic of the coating, and the coating has good hydrophobic property and good mechanical property; the nano silicon dioxide is used as a micro-nano structure modifier to construct a micro-nano rough structure on the surface of the coating, so that the gas-liquid interface on the surface of the coating can be enhanced; in the second step, the ferric oxide powder, the silicon powder, the titanium powder, the molybdenum powder and the aluminum powder are subjected to blending ball milling treatment, so that the mixing and compounding treatment effect of the base material A can be effectively enhanced, and the structural uniformity and stability of the subsequent first layer protection are ensured; in the third step, the polydimethylsiloxane, the ethanol and the polyurethane are subjected to blending water bath ultrasonic treatment, so that the surface modification treatment of the polydimethylsiloxane on the polyurethane can be effectively ensured; then adding titanium carbide and nano silicon dioxide for water bath ultrasonic treatment, so that the mixed composite treatment effect of the base material A can be effectively enhanced, and the structural uniformity and stability of the subsequent second-layer protection are ensured; in the fourth step, the base material A is laser-clad on the surface of the wind power casting, so that the rapid forming of the first layer of protection can be effectively ensured; in the fifth step, the base material B is sprayed on the surface of the first layer of protection, a second layer of protection is formed on the outer side of the first layer of protection, and the double-layer protection can further strengthen the protection treatment effect on the wind power casting.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A preparation method of a surface protection coating for wind power castings is characterized by comprising the following steps of: the preparation method comprises the following specific steps:
step one: weighing ferric oxide powder, silicon powder, titanium powder, molybdenum powder and aluminum powder in the base material A, and polydimethylsiloxane, titanium carbide, nano silicon dioxide, ethanol and polyurethane in the base material B;
step two: carrying out blending ball milling treatment on the ferric oxide powder, the silicon powder, the titanium powder, the molybdenum powder and the aluminum powder in the first step for 70-90 minutes to obtain a base material A;
step three: mixing polydimethylsiloxane, ethanol and polyurethane in the first step, performing ultrasonic treatment in a water bath for 60-80 minutes to obtain a mixture, adding titanium carbide and nano silicon dioxide in the first step into the mixture, and continuing the ultrasonic treatment in the water bath for 40-60 minutes to obtain a base material B;
step four: performing laser cladding treatment on the surface of the wind power casting by using the base material A in the second step to prepare a laser cladding layer on the surface of the wind power casting;
step five: uniformly spraying the base material B in the step three on the surface of a laser cladding layer in an electrostatic spraying mode, and drying and curing to form protective coating on the surface of the wind power casting;
the surface protection coating for the wind power castings comprises a base material A and a base material B, wherein the base material B is arranged on the outer side of the base material A; the weight ratio of the base material A to the wind power casting is 1:100-120; the weight ratio of the base material B to the base material A is 1:2-4; the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3 to 5.3 percent of polydimethylsiloxane, 30 to 32 percent of titanium carbide, 16 to 18 percent of nano silicon dioxide, 3.6 to 4.6 percent of ethanol and the balance of polyurethane.
2. The method for preparing the surface protection coating for the wind power casting, which is characterized by comprising the following steps of: the weight ratio of the base material A to the wind power casting is 1:100; the weight ratio of the base material B to the base material A is 1:2; the base material A comprises the following components in percentage by weight: 23% of ferric oxide powder, 1.6% of silicon powder, 1.4% of titanium powder, 1.6% of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3% of polydimethylsiloxane, 30% of titanium carbide, 16% of nano silicon dioxide, 3.6% of ethanol and the balance of polyurethane.
3. The method for preparing the surface protection coating for the wind power casting, which is characterized by comprising the following steps of: the weight ratio of the base material A to the wind power casting is 1:120; the weight ratio of the base material B to the base material A is 1:4; the base material A comprises the following components in percentage by weight: 25% of ferric oxide powder, 2.6% of silicon powder, 2.4% of titanium powder, 2.6% of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 5.3% of polydimethylsiloxane, 32% of titanium carbide, 18% of nano silicon dioxide, 4.6% of ethanol and the balance of polyurethane.
4. The method for preparing the surface protection coating for the wind power casting, which is characterized by comprising the following steps of: the weight ratio of the base material A to the wind power casting is 1:110; the weight ratio of the base material B to the base material A is 1:3; the base material A comprises the following components in percentage by weight: 23 to 25 percent of ferric oxide powder, 1.6 to 2.6 percent of silicon powder, 1.4 to 2.4 percent of titanium powder, 1.6 to 2.6 percent of molybdenum powder and the balance of aluminum powder; the base material B comprises the following components in percentage by weight: 4.3 to 5.3 percent of polydimethylsiloxane, 30 to 32 percent of titanium carbide, 16 to 18 percent of nano silicon dioxide, 3.6 to 4.6 percent of ethanol and the balance of polyurethane.
5. The method for preparing the surface protection coating for the wind power casting, which is characterized by comprising the following steps of: in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotation speed is 510-590 r/min, and the rotation speed is 1020-1180 r/min; in the third step, the water bath temperature is 40-60 ℃, the ultrasonic frequency is 60-80 KHz, and the ultrasonic power is 900-1000W; in the fourth step, in the laser cladding process, the scanning speed is 6-8 mm/s, the defocusing amount is 1-3 mm, the light spot diameter is 4-6 mm, the powder feeding speed is 16-18 g/min, the laser power is 1.5-1.7 KW, and the lap joint amount is 40-50%; in the fifth step, the electrostatic high voltage is 65-75 KV, the electrostatic current is 15-17 mu A, the flow speed pressure is 0.40-0.50 mpa, the distance between a spray gun opening and a workpiece is 200-260 mm, and the spraying angle is 60-90 degrees.
6. The method for preparing the surface protection coating for the wind power casting, which is disclosed in claim 5, is characterized in that: in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotating speed is 510r/min, and the rotation rotating speed is 1020r/min; in the third step, the water bath temperature is 40 ℃, the ultrasonic frequency is 60KHz, and the ultrasonic power is 900W; in the fourth step, in the laser cladding process, the scanning speed is 6mm/s, the defocusing amount is 1mm, the light spot diameter is 4mm, the powder feeding speed is 16g/min, the laser power is 1.5KW, and the lap joint amount is 40%; in the fifth step, the electrostatic high voltage is 65KV, the electrostatic current is 15 muA, the flow speed pressure is 0.40mpa, the distance between a spray gun opening and a workpiece is 200mm, and the spraying angle is 60 degrees.
7. The method for preparing the surface protection coating for the wind power casting, which is disclosed in claim 5, is characterized in that: in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotation speed is 590r/min, and the rotation speed is 1180r/min; in the third step, the water bath temperature is 60 ℃, the ultrasonic frequency is 80KHz, and the ultrasonic power is 1000W; in the fourth step, in the laser cladding process, the scanning speed is 8mm/s, the defocusing amount is 3mm, the light spot diameter is 6mm, the powder feeding speed is 18g/min, the laser power is 1.7KW, and the lap joint amount is 50%; in the fifth step, the electrostatic high voltage is 75KV, the electrostatic current is 17 muA, the flow speed pressure is 0.50mpa, the distance between a spray gun opening and a workpiece is 260mm, and the spraying angle is 90 degrees.
8. The method for preparing the surface protection coating for the wind power casting, which is disclosed in claim 5, is characterized in that: in the second step, a planetary ball mill is adopted for ball milling treatment, the revolution rotating speed is 550r/min, and the rotation rotating speed is 1100r/min; in the third step, the water bath temperature is 50 ℃, the ultrasonic frequency is 70KHz, and the ultrasonic power is 950W; in the fourth step, in the laser cladding process, the scanning speed is 7mm/s, the defocusing amount is 2mm, the light spot diameter is 5mm, the powder feeding speed is 17g/min, the laser power is 1.6KW, and the lap joint amount is 45%; in the fifth step, the electrostatic high voltage is 70KV, the electrostatic current is 16 muA, the flow speed pressure is 0.45mpa, the distance between a spray gun opening and a workpiece is 230mm, and the spraying angle is 75 degrees.
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