CN108047930A - A kind of bearing shell polymer coating and its spraying process - Google Patents

A kind of bearing shell polymer coating and its spraying process Download PDF

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Publication number
CN108047930A
CN108047930A CN201711480219.6A CN201711480219A CN108047930A CN 108047930 A CN108047930 A CN 108047930A CN 201711480219 A CN201711480219 A CN 201711480219A CN 108047930 A CN108047930 A CN 108047930A
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bearing shell
polymer coating
coating
ball milling
abrasive material
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米新艳
崔新然
张克金
曹婷婷
苏中辉
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FAW Group Corp
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FAW Group Corp
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    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/007—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2505/00—Polyamides
    • B05D2505/50—Polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/24—Titanium dioxide, e.g. rutile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2602/00—Organic fillers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/382—Boron-containing compounds and nitrogen
    • C08K2003/385—Binary compounds of nitrogen with boron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

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  • General Chemical & Material Sciences (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The present invention relates to a kind of bearing shell polymer coatings, it is characterised in that：It is dimethylformamide that coating material component is calculated as alundum (Al2O3) 2 5%, titanium dioxide 1 5%, polytetrafluoroethylene (PTFE) 1 3%, hexagonal boron nitride 5 8%, carborundum 1 3%, molybdenum disulfide 5 8%, polyamidoimide 7 12%, surplus by weight.First by polyamidoimide and dimethylformamide in mass ratio 1:5 are put into 2 3h of ball milling in ball milling instrument, form solution A, alundum (Al2O3), polytetrafluoroethylene (PTFE), hexagonal boron nitride and molybdenum disulfide are fully ground mixing, and it is added in solution A, continue 6 8h of ball milling and form slurry B, titanium dioxide, carborundum and surplus dimethylformamide are added in slurry B, continues 1 3h of ball milling and obtains bearing shell polymer coating slurry.Be made up of rational material and preparation technology of coating, enable coating evenly be attached to bearing shell surface, and possess better anti-attrition wearability.

Description

A kind of bearing shell polymer coating and its spraying process
Technical field
The invention belongs to bearing shell technical fields, specifically design a kind of bearing shell polymer coating and its spraying process.
Background technology
Polymer coating bearing shell has better anti-attrition, wearability, bite-resistant compared to traditional antifriction alloy layer bearing shell Property, especially under the harsh service condition of few oil or oil-free, effect is more obvious, can significantly enhance service life and operation is steady It is qualitative, the problems such as reducing tile kilning, engine abnormal noise because of caused by emergency case, therefore and it is subject to the favor in industry.
At present, the polymer coating of bearing shell substantially makes it be attached to bearing shell working surface by the way of mechanically spraying, Enhance the adhesive force of polymer coating by the pre-treatment to bearing shell base material, by being further improved to the optimization of spraying process The quality of polymer coating.
The Chinese patent of application number 201510385391.8 discloses a kind of method of bearing shell spraying synthetic coating antifriction layer, Including phosphatization pretreatment, cleaning, the preheating to bearing shell inner surface to be sprayed, synthetic paint is preliminarily sprayed, sprays, receiving sweat and curing Processing and etc., this method carries out pre-treatment by techniques such as phosphatizations to bearing shell base material, by being preliminarily sprayed process optimizations is waited to spray Quality, but phosphating process practical operation, management are complex, and are also easy to produce environmental pollution.
The Chinese patent of application number 201510307987.6 discloses a kind of bearing shell coating and its spraying process, including bearing shell Coating preparation, bearing shell cleaning polishing, first drying, a ultrasonic wave deoils, secondary drying, twice ultrasonic ripple are deoiled, dried three times Dry, sandblasting, once spraying, secondary spraying-and-heating cure and examine packing step, by the combination of coating material and spraying process, Coating is made to be significantly improved with bearing alloy caking property, coating uniformity is more preferable.The China of application number 201510308041.1 is specially Profit discloses a kind of technique containing molybdenum disulfide coating and its applied to bearing shell coating, prepared including containing molybdenum disulfide coating, Bearing shell cleaning polishing, first drying, a ultrasonic wave deoil, secondary drying, twice ultrasonic ripple deoil, drying, sandblasting, one three times Secondary spraying, secondary spraying-and-heating cure and examine packing step, by the combination of coating material and spraying process, make coating and axis Watt alloy-layer caking property significantly improves, and coating uniformity is more preferable.More than emphasize coating and spraying process phase in two patents of invention With reference to spraying process is cumbersome to be difficult to industrialization, and lacks innovation.
The content of the invention
It is an object of the invention to provide a kind of bearing shell polymer coating and its spraying process, pass through rational material group Into and preparation technology of coating, enable coating evenly be attached to bearing shell surface, and possess better anti-attrition wearability.
The technical proposal of the invention is realized in this way：A kind of bearing shell polymer coating, it is characterised in that：Coating material Component is calculated as alundum (Al2O3) 2-5%, titanium dioxide 1-5%, polytetrafluoroethylene (PTFE) 1-3%, hexagonal boron nitride 5-8%, carbon by weight SiClx 1-3%, molybdenum disulfide 5-8%, polyamidoimide 7-12%, surplus are dimethylformamide.First by polyamidoimide With dimethylformamide in mass ratio 1:5 are put into ball milling 2-3h in ball milling instrument, solution A are formed, by alundum (Al2O3), polytetrafluoro Ethylene, hexagonal boron nitride and molybdenum disulfide are fully ground mixing, and are added in solution A, continue ball milling 6-8h and form slurry B, Titanium dioxide, carborundum and surplus dimethylformamide are added in slurry B, continues ball milling 1-3h and obtains bearing shell polymer Coating paste.
Spraying process, it is characterised in that include the following steps：1）Except grease cleans, bearing shell to be sprayed is placed in neutral grease removal It is cleaned in agent, 50-60 DEG C of temperature, time 5-10 min, is then rinsed with a large amount of clear water, be placed in 70 DEG C of baking ovens and dry.
2）The multiple blasting treatment of staged, selects several groups from small particle abrasive material to big grain size abrasive material successively, and as Blasting treatment order carries out bearing shell surface to be sprayed blasting treatment using sand-blasting machine, and sandblasting angle is to be painted perpendicular to bearing shell Surface is applied, small particle abrasive material chooses relatively large blasting pressure and longer blast time, and big grain size abrasive material chooses relatively small spray Sand pressure and shorter blast time, specific sandblasting distance, pressure and time are depending on actual conditions.
3）Bearing shell cleans, and the bearing shell after blasting treatment is carried out ultrasonic cleaning, scavenging period 5-10 min are used after taking-up Hot water rinses, then is dried up with compressed air, is subsequently placed in 70 DEG C of baking ovens and dries, and treated, and bearing shell should deposit in dustless do It sprays in dry environment and as early as possible, ensures bearing shell surface cleaning to be sprayed, Do not touch.
4）Bearing shell sprays, and spraying operation is carried out in the environment of dustless low humidity, and spraying direction is in bearing shell surface to be sprayed 60 °, polymer coating bearing shell is placed in naturally dry 60-90 min at aeration-drying after spraying, makes coating paste abundant The rough surface being infiltrated on after bearing shell blasting treatment.
5）Curing process, the polymer coating bearing shell after drying are placed in the curing of Muffle furnace high temperature, and program setting is served as reasons Room temperature is heated to 150 DEG C, keeps the temperature 60-90 min, continues to be heated to 260 DEG C by 150 DEG C, keeps the temperature 80-120 min, naturally cold But.
The alundum (Al2O3), titanium dioxide, polytetrafluoroethylene (PTFE), hexagonal boron nitride, carborundum, molybdenum disulfide, polyamides Amine acid imide is pulverulent solids, and wherein carborundum and molybdenum disulfide grain size are less than 100 nm, remaining material particle size is less than 20 μm。
The abrasive material is diamond dust or quartz sand, and abrasive material shape is the horn shape for having sharp edge, is conducive to improve coating attachment Power.
The dustless low moisture environments are that dustless grade is 10,000 grades or more, and air humidity is not more than 40 %.
Good effect of the present invention is
1st, by choosing corresponding material and component proportion, stringent mixing procedure is coordinated, it is ensured that slurry uniformly disperses, and reduces and applies Layer surface roughness, optimizes coating performance.
2nd, bearing shell is carried out cleaning except grease, it is preliminary to remove bearing shell surface and oil contaminant, by the multiple blasting treatment of staged, make Bearing shell obtains multi-level coarse surface to be sprayed, coordinates rational spraying and curing process, significantly enhances between coating and base material With reference to power, anti-attrition wear-resisting property is improved；
Table 1 is coating of the present invention and performance comparison test's result of similar products at home and abroad
Detection device：The quiet coefficient of kinetic friction measuring instruments of CSM
Measurement parameter：Pressure head：GCr15 steel balls, diameter 6mm, ram load：10N, reciprocating friction distance：4mm, reciprocating friction speed Degree：100mm/s.
Specific embodiment
With reference to embodiment, the present invention will be further described：
Embodiment 1
A kind of bearing shell polymer coating, material component are calculated as alundum (Al2O3) 2%, titanium dioxide 1%, polytetrafluoroethyl-ne by weight Alkene 1%, hexagonal boron nitride 5%, carborundum 1%, molybdenum disulfide 5%, polyamidoimide 7%, surplus are dimethylformamide.First By polyamidoimide and dimethylformamide in mass ratio 1:5 are put into ball milling 2h in ball milling instrument, solution A are formed, by three oxygen Change two aluminium, polytetrafluoroethylene (PTFE), hexagonal boron nitride and molybdenum disulfide and be fully ground mixing, and be added in solution A, continue ball milling 6h Slurry B is formed, titanium dioxide, carborundum and surplus dimethylformamide are added in slurry B, continues ball milling 1h and obtains bearing shell With polymer coating slurry.
Spraying process, it is characterised in that include the following steps：1）Except grease cleans, bearing shell to be sprayed is placed in neutral grease removal It is cleaned in agent, 50 DEG C of temperature, 5 min of time, is then rinsed with a large amount of clear water, be placed in 70 DEG C of baking ovens and dry.
2）The multiple blasting treatment of staged, selects several groups from small particle abrasive material to big grain size abrasive material successively, and as Blasting treatment order carries out bearing shell surface to be sprayed blasting treatment using sand-blasting machine, and sandblasting angle is to be painted perpendicular to bearing shell Surface is applied, small particle abrasive material chooses relatively large blasting pressure and longer blast time, and big grain size abrasive material chooses relatively small spray Sand pressure and shorter blast time, specific sandblasting distance, pressure and time are depending on actual conditions.
3）Bearing shell cleans, and the bearing shell after blasting treatment is carried out ultrasonic cleaning, 5 min of scavenging period, with heat after taking-up Water rinses, then is dried up with compressed air, is subsequently placed in 70 DEG C of baking ovens and dries, treated, and bearing shell should deposit in dustless drying Environment in and spray as early as possible, ensure bearing shell surface cleaning to be sprayed, Do not touch.
4）Bearing shell sprays, and spraying operation is carried out in the environment of dustless low humidity, and spraying direction is in bearing shell surface to be sprayed 60 °, polymer coating bearing shell is placed in 60 min of naturally dry at aeration-drying after spraying, coating paste is made fully to infiltrate Rough surface after bearing shell blasting treatment.
5）Curing process, the polymer coating bearing shell after drying are placed in the curing of Muffle furnace high temperature, and program setting is served as reasons Room temperature is heated to 150 DEG C, keeps the temperature 60 min, continues to be heated to 260 DEG C by 150 DEG C, keeps the temperature 80 min, natural cooling.
The alundum (Al2O3), titanium dioxide, polytetrafluoroethylene (PTFE), hexagonal boron nitride, carborundum, molybdenum disulfide, polyamides Amine acid imide is pulverulent solids, and wherein carborundum and molybdenum disulfide grain size are less than 100 nm, remaining material particle size is less than 20 μm。
The abrasive material is diamond dust or quartz sand, and abrasive material shape is the horn shape for having sharp edge, is conducive to improve coating attachment Power.
The dustless low moisture environments are that dustless grade is 10,000 grades or more, and air humidity is not more than 40 %.
Bearing shell polymer coating is detected according to the cross cut test of GB/T 9286-1998 standards, result of the test is 0 grade, is cut Cut edge edge is completely smooth, none lattice comes off.
Bearing shell polymer coating according to GB GB5270-2005 standards bend test is detected, has no that synthetic coating cracks Or it comes off.
By bearing shell polymer coating according to GB-T 1732-1993 standard impact resistance testing inspections, coating surface flawless, Wrinkle and peeling phenomenon.
Embodiment 2
A kind of bearing shell is calculated as alundum (Al2O3) 5%, titanium dioxide 5%, polytetrafluoroethyl-ne by weight with polymer coating materials component Alkene 3%, hexagonal boron nitride 8%, carborundum 3%, molybdenum disulfide 8%, polyamidoimide 12%, surplus are dimethylformamide.First By polyamidoimide and dimethylformamide in mass ratio 1:5 are put into ball milling 3h in ball milling instrument, solution A are formed, by three oxygen Change two aluminium, polytetrafluoroethylene (PTFE), hexagonal boron nitride and molybdenum disulfide and be fully ground mixing, and be added in solution A, continue ball milling 6- 8h forms slurry B, and titanium dioxide, carborundum and surplus dimethylformamide are added in slurry B, continues ball milling 1-3h and obtains Bearing shell polymer coating slurry.
Spraying process, it is characterised in that include the following steps：1）Except grease cleans, bearing shell to be sprayed is placed in neutral grease removal It is cleaned in agent, 60 DEG C of temperature, 10 min of time, is then rinsed with a large amount of clear water, be placed in 70 DEG C of baking ovens and dry.
2）The multiple blasting treatment of staged, selects several groups from small particle abrasive material to big grain size abrasive material successively, and as Blasting treatment order carries out bearing shell surface to be sprayed blasting treatment using sand-blasting machine, and sandblasting angle is to be painted perpendicular to bearing shell Surface is applied, small particle abrasive material chooses relatively large blasting pressure and longer blast time, and big grain size abrasive material chooses relatively small spray Sand pressure and shorter blast time, specific sandblasting distance, pressure and time are depending on actual conditions.
3）Bearing shell cleans, and the bearing shell after blasting treatment is carried out ultrasonic cleaning, 10 min of scavenging period, with heat after taking-up Water rinses, then is dried up with compressed air, is subsequently placed in 70 DEG C of baking ovens and dries, treated, and bearing shell should deposit in dustless drying Environment in and spray as early as possible, ensure bearing shell surface cleaning to be sprayed, Do not touch.
4）Bearing shell sprays, and spraying operation is carried out in the environment of dustless low humidity, and spraying direction is in bearing shell surface to be sprayed 60 °, polymer coating bearing shell is placed in 90 min of naturally dry at aeration-drying after spraying, coating paste is made fully to infiltrate Rough surface after bearing shell blasting treatment.
5）Curing process, the polymer coating bearing shell after drying are placed in the curing of Muffle furnace high temperature, and program setting is served as reasons Room temperature is heated to 150 DEG C, keeps the temperature 90 min, continues to be heated to 260 DEG C by 150 DEG C, keeps the temperature 120 min, natural cooling.
The alundum (Al2O3), titanium dioxide, polytetrafluoroethylene (PTFE), hexagonal boron nitride, carborundum, molybdenum disulfide, polyamides Amine acid imide is pulverulent solids, and wherein carborundum and molybdenum disulfide grain size are less than 100 nm, remaining material particle size is less than 20 μm。
The abrasive material is diamond dust or quartz sand, and abrasive material shape is the horn shape for having sharp edge, is conducive to improve coating attachment Power.
The dustless low moisture environments are that dustless grade is 10,000 grades or more, and air humidity is not more than 40 %.
Embodiment 3
A kind of bearing shell is calculated as alundum (Al2O3) 3%, titanium dioxide 4%, polytetrafluoroethyl-ne by weight with polymer coating materials component Alkene 2%, hexagonal boron nitride 6%, carborundum 2%, molybdenum disulfide 6%, polyamidoimide 9%, surplus are dimethylformamide.First By polyamidoimide and dimethylformamide in mass ratio 1:5 are put into ball milling 2.5h in ball milling instrument, solution A are formed, by three Al 2 O, polytetrafluoroethylene (PTFE), hexagonal boron nitride and molybdenum disulfide are fully ground mixing, and are added in solution A, continue ball milling 7h forms slurry B, and titanium dioxide, carborundum and surplus dimethylformamide are added in slurry B, continues ball milling 2h and obtains axis Watt with polymer coating slurry.
Spraying process, it is characterised in that include the following steps：1）Except grease cleans, bearing shell to be sprayed is placed in neutral grease removal It is cleaned in agent, 55 DEG C of temperature, 8 min of time, is then rinsed with a large amount of clear water, be placed in 70 DEG C of baking ovens and dry.
2）The multiple blasting treatment of staged, selects several groups from small particle abrasive material to big grain size abrasive material successively, and as Blasting treatment order carries out bearing shell surface to be sprayed blasting treatment using sand-blasting machine, and sandblasting angle is to be painted perpendicular to bearing shell Surface is applied, small particle abrasive material chooses relatively large blasting pressure and longer blast time, and big grain size abrasive material chooses relatively small spray Sand pressure and shorter blast time, specific sandblasting distance, pressure and time are depending on actual conditions.
3）Bearing shell cleans, and the bearing shell after blasting treatment is carried out ultrasonic cleaning, scavenging period 8min uses hot water after taking-up Rinsing, then dried up with compressed air, it is subsequently placed in 70 DEG C of baking ovens and dries, treated, and bearing shell should deposit in dustless drying It sprays in environment and as early as possible, ensures bearing shell surface cleaning to be sprayed, Do not touch.
4）Bearing shell sprays, and spraying operation is carried out in the environment of dustless low humidity, and spraying direction is in bearing shell surface to be sprayed 60 °, polymer coating bearing shell is placed in 70 min of naturally dry at aeration-drying after spraying, coating paste is made fully to infiltrate Rough surface after bearing shell blasting treatment.
5）Curing process, the polymer coating bearing shell after drying are placed in the curing of Muffle furnace high temperature, and program setting is served as reasons Room temperature is heated to 150 DEG C, keeps the temperature 80 min, continues to be heated to 260 DEG C by 150 DEG C, keeps the temperature 100 min, natural cooling.
The alundum (Al2O3), titanium dioxide, polytetrafluoroethylene (PTFE), hexagonal boron nitride, carborundum, molybdenum disulfide, polyamides Amine acid imide is pulverulent solids, and wherein carborundum and molybdenum disulfide grain size are less than 100 nm, remaining material particle size is less than 20 μm。
The abrasive material is diamond dust or quartz sand, and abrasive material shape is the horn shape for having sharp edge, is conducive to improve coating attachment Power.
The dustless low moisture environments are that dustless grade is 10,000 grades or more, and air humidity is not more than 40 %.

Claims (5)

1. a kind of bearing shell polymer coating, it is characterised in that：Coating material component be calculated as by weight alundum (Al2O3) 2-5%, Titanium dioxide 1-5%, polytetrafluoroethylene (PTFE) 1-3%, hexagonal boron nitride 5-8%, carborundum 1-3%, molybdenum disulfide 5-8%, polyamide acyl are sub- Amine 7-12%, surplus are dimethylformamide；First by polyamidoimide and dimethylformamide in mass ratio 1:5 are put into Ball milling 2-3h in ball milling instrument forms solution A, alundum (Al2O3), polytetrafluoroethylene (PTFE), hexagonal boron nitride and molybdenum disulfide is fully ground Mill mixing, and be added in solution A, continue ball milling 6-8h and form slurry B, by titanium dioxide, carborundum and surplus dimethyl methyl Amide is added in slurry B, is continued ball milling 1-3h and is obtained bearing shell polymer coating slurry.
A kind of 2. bearing shell polymer coating according to claim 1, it is characterised in that the coating spraying technique bag Include following steps：1）Except grease cleans, bearing shell to be sprayed is placed in neutral grease removal agent and is cleaned, 50-60 DEG C of temperature, time 5- Then 10 min are rinsed with a large amount of clear water, are placed in 70 DEG C of baking ovens and dry；
2）The multiple blasting treatment of staged selects several groups successively from small particle abrasive material to big grain size abrasive material, and as sandblasting Processing sequence carries out bearing shell surface to be sprayed blasting treatment using sand-blasting machine, and sandblasting angle is perpendicular to bearing shell table to be sprayed Face, small particle abrasive material choose relatively large blasting pressure and longer blast time, and big grain size abrasive material chooses relatively small sandblasting pressure Power and shorter blast time, specific sandblasting distance, pressure and time are depending on actual conditions；
3）Bearing shell cleans, and the bearing shell after blasting treatment is carried out ultrasonic cleaning, scavenging period 5-10 min use hot water after taking-up Rinsing, then dried up with compressed air, it is subsequently placed in 70 DEG C of baking ovens and dries, treated, and bearing shell should deposit in dustless drying It sprays in environment and as early as possible, ensures bearing shell surface cleaning to be sprayed, Do not touch；
4）Bearing shell sprays, and spraying operation is carried out in the environment of dustless low humidity, and spraying direction is in 60 ° with bearing shell surface to be sprayed, Polymer coating bearing shell is placed in naturally dry 60-90 min at aeration-drying after spraying, coating paste is made fully to infiltrate Rough surface after bearing shell blasting treatment；
5）Curing process, the polymer coating bearing shell after drying are placed in the curing of Muffle furnace high temperature, and program setting is by room temperature 150 DEG C are heated to, keeps the temperature 60-90 min, continues to be heated to 260 DEG C by 150 DEG C, keeps the temperature 80-120 min, natural cooling.
3. according to a kind of bearing shell polymer coating described in claim 1, it is characterised in that the alundum (Al2O3), two Titanium oxide, polytetrafluoroethylene (PTFE), hexagonal boron nitride, carborundum, molybdenum disulfide, polyamidoimide are pulverulent solids, wherein Carborundum and molybdenum disulfide grain size are less than 100 nm, remaining material particle size is less than 20 μm.
4. according to a kind of bearing shell polymer coating described in claim 2, it is characterised in that the abrasive material is diamond dust Or quartz sand, abrasive material shape are the horn shape for having sharp edge, are conducive to improve coating adhesion.
5. according to a kind of bearing shell polymer coating described in claim 2, it is characterised in that the dustless low moisture environments It it is 10,000 grades or more for dustless grade, air humidity is not more than 40 %.
CN201711480219.6A 2017-12-29 2017-12-29 A kind of bearing shell polymer coating and its spraying process Pending CN108047930A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110079209A (en) * 2019-04-02 2019-08-02 曹均 Wide temperature range internal combustion engine bearing self-lubricating coat in use and its spraying method
CN114959540A (en) * 2022-07-04 2022-08-30 江苏贝尔机械有限公司 Wear-resistant and adhesion-resistant spraying method for inner barrel of battery material mixer
CN115926618A (en) * 2023-01-05 2023-04-07 营口理工学院 Steady-state suspension niobium-particle-containing bearing bush coating slurry and coating preparation process

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CN102816518A (en) * 2012-09-06 2012-12-12 山东滨州渤海活塞股份有限公司 Carbon-carbon composite nano-base wear-resistant coating material
CN104893450A (en) * 2015-06-08 2015-09-09 烟台大丰轴瓦有限责任公司 Bearing bush coating material and spraying technique thereof
CN105032745A (en) * 2015-06-08 2015-11-11 烟台大丰轴瓦有限责任公司 Method for reinforcing coating on surface of bearing bush alloy layer

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN102816518A (en) * 2012-09-06 2012-12-12 山东滨州渤海活塞股份有限公司 Carbon-carbon composite nano-base wear-resistant coating material
CN104893450A (en) * 2015-06-08 2015-09-09 烟台大丰轴瓦有限责任公司 Bearing bush coating material and spraying technique thereof
CN105032745A (en) * 2015-06-08 2015-11-11 烟台大丰轴瓦有限责任公司 Method for reinforcing coating on surface of bearing bush alloy layer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110079209A (en) * 2019-04-02 2019-08-02 曹均 Wide temperature range internal combustion engine bearing self-lubricating coat in use and its spraying method
CN114959540A (en) * 2022-07-04 2022-08-30 江苏贝尔机械有限公司 Wear-resistant and adhesion-resistant spraying method for inner barrel of battery material mixer
CN115926618A (en) * 2023-01-05 2023-04-07 营口理工学院 Steady-state suspension niobium-particle-containing bearing bush coating slurry and coating preparation process

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