CN116904973A - High-strength automobile brake disc and preparation method thereof - Google Patents
High-strength automobile brake disc and preparation method thereof Download PDFInfo
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- CN116904973A CN116904973A CN202310793920.2A CN202310793920A CN116904973A CN 116904973 A CN116904973 A CN 116904973A CN 202310793920 A CN202310793920 A CN 202310793920A CN 116904973 A CN116904973 A CN 116904973A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000011159 matrix material Substances 0.000 claims abstract description 75
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 239000011248 coating agent Substances 0.000 claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 38
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 27
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 23
- 238000007750 plasma spraying Methods 0.000 claims abstract description 16
- 229960000583 acetic acid Drugs 0.000 claims abstract description 13
- 239000012362 glacial acetic acid Substances 0.000 claims abstract description 13
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 claims abstract description 12
- TVCBSVKTTHLKQC-UHFFFAOYSA-M propanoate;zirconium(4+) Chemical compound [Zr+4].CCC([O-])=O TVCBSVKTTHLKQC-UHFFFAOYSA-M 0.000 claims abstract description 12
- 229910000348 titanium sulfate Inorganic materials 0.000 claims abstract description 12
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 claims abstract description 11
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000009713 electroplating Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 239000003973 paint Substances 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims abstract description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 48
- 238000005507 spraying Methods 0.000 claims description 36
- 239000000758 substrate Substances 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 7
- 230000035484 reaction time Effects 0.000 claims description 7
- 238000005488 sandblasting Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 7
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000012265 solid product Substances 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- -1 aluminum ions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
-
- 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
-
- 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
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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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
- C23C4/18—After-treatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/42—Electroplating: Baths therefor from solutions of light metals
- C25D3/44—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Inorganic Chemistry (AREA)
- Electrochemistry (AREA)
- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to the technical field of automobile brake disc preparation, in particular to a high-strength automobile brake disc and a preparation method thereof. The invention provides a preparation method of a high-strength automobile brake disc, which comprises the following steps: electroplating an aluminum film layer on the surface of the brake disc matrix; mixing zirconium propionate, titanium sulfate, ferrocene dicarboxylic acid, glacial acetic acid and a solvent, and then performing hydrothermal reaction to obtain spray paint; forming a wear-resistant coating on the surface of an aluminum film of a brake disc matrix by adopting a plasma spraying process; and carrying out heat treatment, electrolysis and secondary heat treatment on the wear-resistant coating of the brake disc matrix to obtain the high-strength automobile brake disc. The wear-resistant coating obtained by the process disclosed by the invention not only has high strength, but also has good combination property of the coating and a matrix and good wear resistance.
Description
Technical Field
The invention relates to the technical field of automobile brake disc preparation, in particular to a high-strength automobile brake disc and a preparation method thereof.
Background
With the improvement of the living standard of people, automobiles become an indispensable transportation means for people, but also bring about the problems of air pollution and the like. In order to effectively relieve the problems of energy and pollution brought by automobiles, the realization of the weight reduction of automobiles becomes an important measure.
At present, cast iron materials are mostly adopted as automobile brake disc materials, however, the cast iron materials have larger specific gravity, so that the weight of an automobile is larger, and the energy consumption is more. In order to realize the light weight of the automobile, light materials such as aluminum base and the like are generally adopted to replace heavier cast iron materials, however, the aluminum base materials are used as brake disc materials, and have lower strength and poorer wear resistance. In order to improve the strength and the wear resistance of the aluminum-based brake disc, the prior art generally adopts to cover a wear-resistant layer on the surface of the aluminum-based brake disc, but the improvement on the strength and the wear resistance is still limited.
Disclosure of Invention
In order to overcome the defect that the existing aluminum-based brake disc surface wear-resistant layer has limited improvement on the strength and wear resistance of the brake disc, the high-strength automobile brake disc and the preparation method thereof are provided.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a preparation method of a high-strength automobile brake disc comprises the following steps:
1) Electroplating an aluminum film layer on the surface of the brake disc matrix to obtain the brake disc matrix plated with the aluminum film;
2) Mixing zirconium propionate, titanium sulfate, ferrocene dicarboxylic acid, glacial acetic acid and a solvent, performing hydrothermal reaction, centrifuging, washing and drying after the reaction is finished to obtain spray paint;
3) Forming a wear-resistant coating on the surface of an aluminum film of a brake disc matrix by adopting a plasma spraying process;
4) Carrying out heat treatment on the wear-resistant coating of the brake disc matrix to obtain a heat-treated brake disc matrix;
5) Immersing an aluminum film layer and a wear-resistant coating of the brake disc matrix in an acidic electrolyte for electrolysis, taking out the brake disc matrix after the electrolysis is finished, washing with water, and drying to obtain an electrolyzed brake disc matrix;
6) And carrying out secondary heat treatment on the wear-resistant coating of the brake disc matrix after electrolysis to obtain the high-strength automobile brake disc.
Preferably, in the step 2), the mass ratio of zirconium propionate, titanium sulfate, ferrocene dicarboxylic acid and glacial acetic acid is (8-15): (8-15): (5-10): (20-50).
Preferably, the thickness of the aluminum film layer is 10-20 μm.
Preferably, the mass ratio of the glacial acetic acid to the solvent is (0.2-1): 1;
the hydrothermal reaction temperature is 100-140 ℃, and the hydrothermal reaction time is 8-15h.
Preferably, in step 2), the solvent is dichloromethane;
the washing step is performed with methylene chloride.
Preferably, the thickness of the wear-resistant coating in step 3) is 500-700 μm;
in the plasma spraying process, the spraying current is 300-350A, the spraying voltage is 40V, the powder feeding speed is 3.5-4.0g/min, the argon flow is 120-130SCFH, the hydrogen flow is 20-25SCFH, the powder feeding direction is 90 degrees, the spraying distance is 500-600mm, and the spraying speed is 20-30mm/s.
Preferably, the heat treatment temperature in the step 4) is 580-640 ℃, and the heat treatment time is 1-3h;
the solute in the acid electrolyte in the step 5) is sulfuric acid and sodium chloride, wherein the concentration of the sulfuric acid is 5-15g/L, and the concentration of the sodium chloride is 25-35g/L;
the current density in the electrolysis step is 0.02-0.04 A.cm -2 The electrolysis time is 20-40min.
Preferably, the temperature of the secondary heat treatment in the step 6) is 460-520 ℃, and the time of the secondary heat treatment is 1-3h.
Preferably, the method comprises the steps of,
the step 1) of polishing and sand blasting the surface of the brake disc matrix is further included before the aluminum film layer is electroplated on the surface of the brake disc matrix;
the brake disc substrate is an aluminum alloy brake disc substrate; the aluminum alloy brake disc matrix comprises the following components in percentage by mass: 6.2-6.9% of Si, 0.3-0.4% of Mg, 0.2-0.3% of Fe, 0.1-0.2% of Cu and the balance of Al.
The invention also provides a preparation method of the high-strength automobile brake disc, which is prepared by the preparation method.
The invention has the beneficial effects that:
according to the preparation method of the high-strength automobile brake disc, firstly, an aluminum film is formed on the surface of a substrate of the brake disc, a wear-resistant coating is formed on the surface of the aluminum film of the substrate of the brake disc by using a spray coating obtained by a specific method through a plasma spray coating process, and then the high-strength automobile brake disc is obtained through primary heat treatment, electrolysis and secondary heat treatment; according to the invention, zirconium propionate, titanium sulfate and ferrocenedicarboxylic acid are subjected to hydrothermal reaction, a cross-linked network structure is formed through coordination of ferrocenedicarboxylic acid, zirconium metal and titanium metal, zirconium metal and ferrocene are uniformly distributed in the network structure, then a wear-resistant coating is formed on the surface of an aluminum film through a plasma spraying process, the zirconium metal and titanium metal form corresponding oxides through primary heat treatment, ferrocene connected with the corresponding oxides is evaporated, pores are formed in the wear-resistant coating, then aluminum ions in the aluminum film can migrate into the pores through electrolytic treatment and form aluminum oxide through secondary heat treatment, and the wear-resistant coating obtained through the process disclosed by the invention has high strength, good binding property of the coating and a matrix and good wear resistance.
Detailed Description
The following examples are provided for a better understanding of the present invention and are not limited to the preferred embodiments described herein, but are not intended to limit the scope of the invention, any product which is the same or similar to the present invention, whether in light of the present teachings or in combination with other prior art features, falls within the scope of the present invention.
The specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
Example 1
The embodiment provides a preparation method of a high-strength automobile brake disc, which comprises the following steps:
1) Polishing the surface of the cast aluminum alloy brake disc matrix, and carrying out sand blasting to obtain a pretreated brake disc matrix, wherein the aluminum alloy brake disc matrix comprises the following components in percentage by mass: 6.8% of Si, 0.4% of Mg, 0.3% of Fe, 0.2% of Cu and the balance of Al;
2) Electroplating an aluminum film layer on the surface of the pretreated brake disc matrix, wherein the thickness of the aluminum film layer is 15 mu m, so as to obtain the brake disc matrix plated with the aluminum film;
3) Mixing 10g of zirconium propionate, 10g of titanium sulfate, 5g of ferrocene dicarboxylic acid, 20g of glacial acetic acid and 100g of dichloromethane, adding into a reaction kettle for hydrothermal reaction, wherein the hydrothermal reaction temperature is 120 ℃, the hydrothermal reaction time is 10 hours, centrifuging after the reaction is finished, washing a solid product with dichloromethane, and drying to obtain a spray coating;
4) Forming a wear-resistant coating with the thickness of 600 mu m on the surface of an aluminum film of a brake disc substrate by adopting a plasma spraying process, wherein the plasma spraying process is used for spraying current of 300A, spraying voltage of 40V, powder feeding speed of 3.5g/min, argon flow of 120SCFH, hydrogen flow of 20SCFH, powder feeding direction of 90 degrees, spraying distance of 500mm and spraying speed of 25mm/s;
5) Carrying out heat treatment on the wear-resistant coating of the brake disc matrix, wherein the heat treatment temperature is 620 ℃, and the heat treatment time is 1.5h, so as to obtain a heat-treated brake disc matrix;
6) Impregnating the brake disc substrate with an aluminum film and a wear-resistant coating at 10g/L H 2 SO 4 Electrolysis is carried out in 30g/LNaCl electrolyte, and the electrolysis current density is 0.04 A.cm -2 Taking out the brake disc matrix after the electrolysis is finished, washing with water, and drying to obtain the brake disc matrix after the electrolysis;
7) And carrying out secondary heat treatment on the wear-resistant coating of the brake disc matrix after electrolysis, wherein the heat treatment temperature is 480 ℃, and the heat treatment time is 2 hours, so as to obtain the high-strength automobile brake disc.
Example 2
The embodiment provides a preparation method of a high-strength automobile brake disc, which comprises the following steps:
1) Polishing the surface of the cast aluminum alloy brake disc matrix, and carrying out sand blasting to obtain a pretreated brake disc matrix, wherein the aluminum alloy brake disc matrix comprises the following components in percentage by mass: 6.8% of Si, 0.4% of Mg, 0.3% of Fe, 0.2% of Cu and the balance of Al;
2) Electroplating an aluminum film layer on the surface of the pretreated brake disc matrix, wherein the thickness of the aluminum film layer is 15 mu m, so as to obtain the brake disc matrix plated with the aluminum film;
3) Mixing 15g of zirconium propionate, 10g of titanium sulfate, 8g of ferrocene dicarboxylic acid, 20g of glacial acetic acid and 100g of dichloromethane, adding into a reaction kettle for hydrothermal reaction, wherein the hydrothermal reaction temperature is 120 ℃, the hydrothermal reaction time is 10 hours, centrifuging after the reaction is finished, washing a solid product with dichloromethane, and drying to obtain a spray coating;
4) Forming a wear-resistant coating with the thickness of 610 mu m on the surface of an aluminum film of a brake disc substrate by adopting a plasma spraying process, wherein the plasma spraying process is used for spraying current 300A, spraying voltage 40V, powder feeding speed 3.5g/min, argon flow 120SCFH, hydrogen flow 20SCFH, powder feeding direction 90 degrees, spraying distance 500mm and spraying speed 25mm/s;
5) Carrying out heat treatment on the wear-resistant coating of the brake disc matrix, wherein the heat treatment temperature is 620 ℃, and the heat treatment time is 2 hours, so as to obtain a heat-treated brake disc matrix;
6) Impregnating the brake disc substrate with an aluminum film and a wear-resistant coating at 10g/L H 2 SO 4 Electrolysis is carried out in 30g/LNaCl electrolyte, and the electrolysis current density is 0.03A cm -2 Taking out the brake disc matrix after the electrolysis is finished, washing with water, and drying to obtain the brake disc matrix after the electrolysis;
7) And carrying out secondary heat treatment on the wear-resistant coating of the brake disc matrix after electrolysis, wherein the heat treatment temperature is 500 ℃, and the heat treatment time is 2 hours, so as to obtain the high-strength automobile brake disc.
Example 3
The embodiment provides a preparation method of a high-strength automobile brake disc, which comprises the following steps:
1) Polishing the surface of the cast aluminum alloy brake disc matrix, and carrying out sand blasting to obtain a pretreated brake disc matrix, wherein the aluminum alloy brake disc matrix comprises the following components in percentage by mass: 6.8% of Si, 0.4% of Mg, 0.3% of Fe, 0.2% of Cu and the balance of Al;
2) Electroplating an aluminum film layer on the surface of the pretreated brake disc matrix, wherein the thickness of the aluminum film layer is 15 mu m, so as to obtain the brake disc matrix plated with the aluminum film;
3) Mixing 15g of zirconium propionate, 12g of titanium sulfate, 8g of ferrocene dicarboxylic acid, 20g of glacial acetic acid and 100g of dichloromethane, adding into a reaction kettle for hydrothermal reaction, wherein the hydrothermal reaction temperature is 130 ℃, the hydrothermal reaction time is 12 hours, centrifuging after the reaction is finished, washing a solid product with dichloromethane, and drying to obtain a spray coating;
4) Forming a wear-resistant coating with the thickness of 620 mu m on the surface of an aluminum film of a brake disc substrate by adopting a plasma spraying process, wherein the plasma spraying process is used for spraying current 300A, spraying voltage 40V, powder feeding speed 3.5g/min, argon flow 120SCFH, hydrogen flow 20SCFH, powder feeding direction 90 degrees, spraying distance 500mm and spraying speed 25mm/s;
5) Carrying out heat treatment on the wear-resistant coating of the brake disc matrix, wherein the heat treatment temperature is 620 ℃, and the heat treatment time is 2.5h, so as to obtain a heat-treated brake disc matrix;
6) Impregnating the brake disc substrate with an aluminum film and a wear-resistant coating at 10g/L H 2 SO 4 Electrolysis is carried out in 30g/LNaCl electrolyte, and the electrolysis current density is 0.04 A.cm -2 Taking out the brake disc matrix after the electrolysis is finished, washing with water, and drying to obtain the brake disc matrix after the electrolysis;
7) And carrying out secondary heat treatment on the wear-resistant coating of the brake disc matrix after electrolysis, wherein the heat treatment temperature is 490 ℃, and the heat treatment time is 2.5h, so as to obtain the high-strength automobile brake disc.
Comparative example 1
This comparative example provides a method for preparing a high-strength automobile brake disc, which is different from example 1 in that 10g of zirconium propionate, 10g of titanium sulfate, 20g of glacial acetic acid and 100g of methylene chloride are mixed in step 3), then added into a reaction kettle, stirred for 10 hours at 120 ℃, distilled under reduced pressure, and the solid is washed with methylene chloride and dried to obtain a spray coating.
Comparative example 2
The comparative example provides a preparation method of a high-strength automobile brake disc, which comprises the following steps:
1) Polishing the surface of the cast aluminum alloy brake disc matrix, and carrying out sand blasting to obtain a pretreated brake disc matrix, wherein the aluminum alloy brake disc matrix comprises the following components in percentage by mass: 6.8% of Si, 0.4% of Mg, 0.3% of Fe, 0.2% of Cu and the balance of Al;
2) Electroplating an aluminum film layer on the surface of the pretreated brake disc matrix, wherein the thickness of the aluminum film layer is 15 mu m, so as to obtain the brake disc matrix plated with the aluminum film;
3) Mixing 10g of zirconium propionate, 10g of titanium sulfate, 5g of ferrocene dicarboxylic acid, 20g of glacial acetic acid and 100g of dichloromethane, adding into a reaction kettle for hydrothermal reaction, wherein the hydrothermal reaction temperature is 120 ℃, the hydrothermal reaction time is 10 hours, centrifuging after the reaction is finished, washing a solid product with dichloromethane, and drying to obtain a spray coating;
4) Forming a wear-resistant coating with the thickness of 600 mu m on the surface of an aluminum film of a brake disc substrate by adopting a plasma spraying process, wherein the plasma spraying process is used for spraying current of 300A, spraying voltage of 40V, powder feeding speed of 3.5g/min, argon flow of 120SCFH, hydrogen flow of 20SCFH, powder feeding direction of 90 degrees, spraying distance of 500mm and spraying speed of 25mm/s;
5) Carrying out heat treatment on the wear-resistant coating of the brake disc matrix, wherein the heat treatment temperature is 620 ℃, and the heat treatment time is 1.5h, so as to obtain a heat-treated brake disc matrix;
6) And carrying out secondary heat treatment on the wear-resistant coating of the heat-treated brake disc matrix, wherein the heat treatment temperature is 480 ℃, and the heat treatment time is 2 hours, so as to obtain the automobile brake disc.
Comparative example 3
The comparative example provides a preparation method of a high-strength automobile brake disc, which comprises the following steps:
1) Polishing the surface of the cast aluminum alloy brake disc matrix, and carrying out sand blasting to obtain a pretreated brake disc matrix, wherein the aluminum alloy brake disc matrix comprises the following components in percentage by mass: 6.8% of Si, 0.4% of Mg, 0.3% of Fe, 0.2% of Cu and the balance of Al;
2) Electroplating an aluminum film layer on the surface of the pretreated brake disc matrix, wherein the thickness of the aluminum film layer is 15 mu m, so as to obtain the brake disc matrix plated with the aluminum film;
3) Mixing 10g of zirconium propionate, 10g of titanium sulfate, 5g of ferrocene dicarboxylic acid, 20g of glacial acetic acid and 100g of dichloromethane, adding into a reaction kettle for hydrothermal reaction, wherein the hydrothermal reaction temperature is 120 ℃, the hydrothermal reaction time is 10 hours, centrifuging after the reaction is finished, washing a solid product with dichloromethane, and drying to obtain a spray coating;
4) Forming a wear-resistant coating with the thickness of 600 mu m on the surface of an aluminum film of a brake disc substrate by adopting a plasma spraying process, wherein the plasma spraying process is used for spraying current of 300A, spraying voltage of 40V, powder feeding speed of 3.5g/min, argon flow of 120SCFH, hydrogen flow of 20SCFH, powder feeding direction of 90 degrees, spraying distance of 500mm and spraying speed of 25mm/s;
5) Impregnating the brake disc substrate with an aluminum film and a wear-resistant coating at 10g/L H 2 SO 4 Electrolysis is carried out in 30g/LNaCl electrolyte, and the electrolysis current density is 0.04 A.cm -2 The electrolysis time is 30min, and the electrolysis junction is formedTaking out the brake disc matrix after bundling, washing with water, and drying to obtain an electrolyzed brake disc matrix;
6) And carrying out heat treatment on the wear-resistant coating of the brake disc matrix after electrolysis, wherein the heat treatment temperature is 480 ℃, and the heat treatment time is 2 hours, so as to obtain the high-strength automobile brake disc.
Test case
The brake discs prepared in the above examples and comparative examples were tested for surface hardness, tensile strength of the coating, and frictional wear at 100 c, and the test results are shown in table 1.
TABLE 1
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. The preparation method of the high-strength automobile brake disc is characterized by comprising the following steps of:
1) Electroplating an aluminum film layer on the surface of the brake disc matrix to obtain the brake disc matrix plated with the aluminum film;
2) Mixing zirconium propionate, titanium sulfate, ferrocene dicarboxylic acid, glacial acetic acid and a solvent, performing hydrothermal reaction, centrifuging, washing and drying after the reaction is finished to obtain spray paint;
3) Forming a wear-resistant coating on the surface of an aluminum film of a brake disc matrix by adopting a plasma spraying process;
4) Carrying out heat treatment on the wear-resistant coating of the brake disc matrix to obtain a heat-treated brake disc matrix;
5) Immersing an aluminum film layer and a wear-resistant coating of the brake disc matrix in an acidic electrolyte for electrolysis, taking out the brake disc matrix after the electrolysis is finished, washing with water, and drying to obtain an electrolyzed brake disc matrix;
6) And carrying out secondary heat treatment on the wear-resistant coating of the brake disc matrix after electrolysis to obtain the high-strength automobile brake disc.
2. The method for preparing a high-strength automobile brake disc according to claim 1, wherein in the step 2), the mass ratio of zirconium propionate, titanium sulfate, ferrocenyldicarboxylic acid and glacial acetic acid is (8-15): (8-15): (5-10):
(20-50)。
3. the method for manufacturing a high-strength automotive brake disk according to claim 1, wherein the thickness of the aluminum film layer is 10-20 μm.
4. The method for producing a high-strength automotive brake disk according to claim 1, wherein the mass ratio of glacial acetic acid to solvent is (0.2-1): 1;
the hydrothermal reaction temperature is 100-140 ℃, and the hydrothermal reaction time is 8-15h.
5. The method for producing a high-strength automotive brake disk according to claim 1, wherein the solvent in step 2) is methylene chloride;
the washing step is performed with methylene chloride.
6. The method for producing a high strength automotive brake disk according to claim 1, characterized in that the thickness of the wear-resistant coating in step 3) is 500-700 μm;
in the plasma spraying process, the spraying current is 300-350A, the spraying voltage is 40V, the powder feeding speed is 3.5-4.0g/min, the argon flow is 120-130SCFH, the hydrogen flow is 20-25SCFH, the powder feeding direction is 90 degrees, the spraying distance is 500-600mm, and the spraying speed is 20-30mm/s.
7. The method for manufacturing a high-strength automotive brake disc according to claim 1, wherein the heat treatment temperature in step 4) is 580-640 ℃ and the heat treatment time is 1-3 hours;
the solute in the acid electrolyte in the step 5) is sulfuric acid and sodium chloride, wherein the concentration of the sulfuric acid is 5-15g/L, and the concentration of the sodium chloride is 25-35g/L;
the current density in the electrolysis step is 0.02-0.04 A.cm -2 The electrolysis time is 20-40min.
8. The method for manufacturing a high-strength automotive brake disk according to claim 1, wherein the secondary heat treatment temperature in step 6) is 460 to 520 ℃ and the secondary heat treatment time is 1 to 3 hours.
9. A method for producing a high-strength automotive brake disk according to claim 1, characterized in that,
the step 1) of polishing and sand blasting the surface of the brake disc matrix is further included before the aluminum film layer is electroplated on the surface of the brake disc matrix;
the brake disc substrate is an aluminum alloy brake disc substrate; the aluminum alloy brake disc matrix comprises the following components in percentage by mass: 6.2-6.9% of Si, 0.3-0.4% of Mg, 0.2-0.3% of Fe, 0.1-0.2% of Cu and the balance of Al.
10. A method for preparing a high-strength automotive brake disc, characterized in that the brake disc is prepared by the preparation method according to any one of claims 1 to 9.
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