WO2015174292A1 - 塗膜付摺動部材及び塗膜形成方法 - Google Patents
塗膜付摺動部材及び塗膜形成方法 Download PDFInfo
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- WO2015174292A1 WO2015174292A1 PCT/JP2015/063026 JP2015063026W WO2015174292A1 WO 2015174292 A1 WO2015174292 A1 WO 2015174292A1 JP 2015063026 W JP2015063026 W JP 2015063026W WO 2015174292 A1 WO2015174292 A1 WO 2015174292A1
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- sliding member
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- composition
- solid lubricant
- coating film
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/201—Composition of the plastic
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/38—Lubricating compositions characterised by the base-material being a macromolecular compound containing halogen
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- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/02—Carbon; Graphite
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
- C10M149/12—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M149/14—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds a condensation reaction being involved
- C10M149/18—Polyamides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
- F16C33/206—Multilayer structures, e.g. sleeves comprising a plastic lining with three layers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/02—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only
- C10M2213/023—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/044—Polyamides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/50—Lubricating properties
- F16C2202/52—Graphite
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/40—Imides, e.g. polyimide [PI], polyetherimide [PEI]
- F16C2208/42—Polyamideimide [PAI]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
Definitions
- the present invention relates to a sliding member with a coated film and a method for forming a coated film, and in detail, by making the concentration of the solid lubricant in the coated film be inclined (tilted coating), the lubricity of the film by blending the solid lubricant,
- the present invention relates to a coated sliding member and a method for forming a coated film, which realizes both the adhesion of the film to the base and the simplification of the process.
- Patent Document 1 discloses a compounded composition for a sliding member. A technology using graphite as a solid lubricant is disclosed in Patent Document 2.
- the blending ratio of the solid lubricant is small, the lubricity is not sufficient and it is unsuitable as a composition for a sliding member. On the contrary, in the case where the proportion of the solid lubricant is large, the adhesion is lowered, and the film is easily peeled off from the substrate particularly in the high load region.
- the compounding amount of these solid lubricants may be optimized, and a balance between adhesion and lubricity may be achieved to achieve a function, or adhesion improvement may be attempted by modifying the surface such as primer treatment. ing.
- adhesion improvement may be attempted by modifying the surface such as primer treatment.
- the coexistence is limited, and in the latter, a large improvement in adhesion can not be expected.
- Patent Document 3 attempts to achieve the function by blending silicone oil and greatly improving the lubricity, but by blending a liquid lubricant, the adhesion of the coating film is reduced. Have a problem.
- PAI polyamide imide
- PAI of solid lubricant formulation is coated on it, but there existed the following problems.
- a drying process is required. A process has to be added, which is more expensive than wet on (ON) wet coating.
- the layers are completely separated in the lower layer and the upper layer, and the adhesion between the layers is lowered, and the sliding property is lost when the upper layer is worn because the lower layer portion has no solid lubricant.
- Wet-on (ON) -wet application when the lower layer alone is PAI, the shrinkage difference between the lower layer and the upper layer is large, and the coated surface is likely to be cracked.
- the first object of the present invention is to provide a sliding member with a coated film which can realize both the improvement of the lubricity of the film by the compounding of the solid lubricant and the improvement of the adhesion with the base of the film. is there.
- the second object of the present invention is to provide a sliding member with a coated film which can realize both the improvement of the lubricity of the film by the compounding of the solid lubricant and the improvement of the adhesion with the base of the film. It is an object of the present invention to provide a method for forming a coating film which realizes the simplification of
- a plurality of coating layers are formed on the surface of the sliding member using the sliding member composition containing at least a binder resin and a solid lubricant,
- the coating film characterized in that the concentration of the solid lubricant in the coating film layer far from the surface of the sliding member is higher than the concentration of the solid lubricant in the coating layer near the surface of the sliding member. Sliding member attached.
- composition for a sliding member (1) containing at least a binder resin and a solid lubricant is applied to the sliding member to form a first coating layer, Then, without drying the first coating layer, the composition for a sliding member (2) containing at least a binder resin and a solid lubricant is applied onto the first coating layer to form a second coating layer.
- the compounding ratio X of the solid lubricant in the composition for a sliding member (1) in the first coating layer is in the range of 5 to 35 wt%
- the blending ratio Y of the solid lubricant in the composition for a sliding member (2) in the second coating layer is in the range of 35 to 65 wt%
- the total value (X + Y) of the mixture ratio of the solid lubricant contained in the composition for a sliding member (1) and the composition for a sliding member (2) is 85 or less. .
- the coating-coated sliding member characterized by being obtained by the method for forming a coating film according to 4 or 5 above.
- a sliding member with a coated film which can realize both the improvement of the lubricity of the film by the blending of the solid lubricant and the improvement of the adhesion with the base of the film.
- a sliding member with a coated film which can realize both the improvement of the lubricity of the film by the compounding of the solid lubricant and the improvement of the adhesion with the base of the film. It is possible to provide a coating film forming method that realizes
- the coated sliding member of the present invention is formed by forming a plurality of coated layers on the surface of the sliding member using the composition for sliding member containing at least a binder resin and a solid lubricant, and the surface of the sliding member It is characterized in that the concentration of the solid lubricant in the coating film layer on the side far from the surface is higher than the concentration of the solid lubricant in the coating film layer on the side close to the surface of the sliding member.
- the composition for sliding members contains at least a binder resin and a solid lubricant.
- binder resin examples include, but not particularly limited to, polyamide imide resin (PAI), polyamide resin (PA), polyimide resin (PI), epoxy resin, phenol resin and the like, and one of them is selected and used. Or two or more kinds may be used in combination.
- the solid lubricant is not particularly limited.
- polytetrafluoroethylene PTFE
- tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, etc.
- fluorine polymers selected from polyvinylidene fluoride, trichlorotrifluoroethylene, etc .
- metal disulfides selected from molybdenum disulfide or tungsten disulfide; graphite etc., and one or more of them may be selected and used. They may be used in combination of two or more.
- the coating-coated sliding member of the present invention has a configuration in which a plurality of coating layers are formed on the surface of the sliding member using the sliding member composition.
- the present invention is characterized in that the concentration of the solid lubricant in the coating layer far from the surface of the sliding member is higher than the concentration of the solid lubricant in the coating layer near the surface of the sliding member. There is.
- the plurality of coating layers is preferably two layers, and the concentration of the solid lubricant in the upper layer of the two coating layers is preferably higher than the concentration of the solid lubricant in the lower layer.
- the solid lubricant concentration of the coating film layer (layer of the outermost surface which becomes the sliding surface; upper layer) far from the sliding member is high, the lubricity is improved.
- the concentration of the coating layer closer to the sliding member is low, that is, the solid lubricant concentration is low at the interface between the coating layer and the sliding member (base), the coating and the base firmly adhere.
- the composition for a sliding member used for a plurality of coating layers be the same component.
- the same component means that the composition and the compound constituting the composition for sliding member are the same.
- the resin selected as the binder resin is the same, it is the same component.
- the substance (compound) selected as the solid lubricant is the same, it is the same component.
- the same components are used if the substances (compounds) used for the additives are the same.
- composition for sliding members used for a several coating film layer is the same component, the following effects are exhibited.
- film peeling between the upper layer and the lower layer can be prevented.
- This film peeling can further prevent the film peeling between the upper layer and the lower layer because the upper layer and the lower layer have the same component and the interface disappears when the wet-on (ON) wet coating described later is adopted.
- compositions for sliding members used in a plurality of coating layers are compatible with each other, the interface between the upper layer and the lower layer is eliminated when the wet-on (ON) wet coating described later is employed. Film peeling between the upper layer and the lower layer can be prevented.
- the coating film forming method of the present invention is suitable as a method of forming a coating film in the above-mentioned sliding member with a coating.
- a method of setting a concentration gradient of a solid lubricant between a plurality of coating films, and wet-on (ON) wet coating when forming a plurality of coating films Incorporates the method of adopting
- composition for a sliding member (1) containing at least a binder resin and a solid lubricant is applied to the sliding member to form a first coating layer.
- the composition for a sliding member (2) containing at least a binder resin and a solid lubricant is applied onto the first coating layer to form a second coating layer. Form and then dry to form a coating.
- do not dry means wet on (ON) wet coating, and after applying the lower layer, by not providing a forced drying step before applying the upper layer. is there. Although it may dry naturally by leaving it after apply
- the specific composition of the concentration gradient is such that the compounding ratio X of the solid lubricant in the composition for a sliding member (1) in the first coating layer is in the range of 5 to 35 wt%, and the second coating
- the compounding ratio Y of the solid lubricant in the composition for a sliding member (2) in the layer is in the range of 35 to 65 wt%, and the composition for a sliding member (1) and the composition for the sliding member
- the total value (X + Y) of the mixture ratio of the solid lubricant contained in 2) is 85 or less.
- the above concentration specification indicates that the concentration of the solid lubricant inside the coating film is inclined to rise outward (from the lower layer to the upper layer).
- composition for a sliding member When the composition for a sliding member is wet-on (ON) and wet-coated to form a two-layer structure, it is preferable to apply the composition for a sliding member with the same component. Since the upper layer and the lower layer are the same component and the interface disappears, the film peeling between the upper layer and the lower layer is further eliminated.
- the meaning of the same component uses the contents defined in the description of the invention of the coated sliding member.
- the resin mentioned above is used as a binder resin and solid lubricant which are used for the composition for sliding members.
- the blending amount of the binder resin is preferably 30 to 65% by weight, and the blending amount of the binder resin to be blended in the lower layer composition is 65 to A range of 95% by weight is preferred.
- a solvent can be used for the composition for sliding members used for the coating-film formation method of this invention, in order to improve coating property.
- the solvent include, but not particularly limited to, N-methyl-2-pyrrolidone, N, N-dimethylformamide, xylene, methyl ethyl ketone, methyl isobutyl ketone and the like. These solvents may be used alone or in combination of two or more.
- composition for a sliding member may further contain a coloring agent, an antifoaming agent, a surfactant and other additives, as long as the object of the present invention is not impaired.
- additives may be used alone or in combination of two or more.
- the composition for a sliding member contains a binder resin, a solid lubricant, other additives, and a solvent in a predetermined amount, and is mixed and dispersed using a stirrer such as a dissolver, a ball mill, a sand mill, an azimuth homomixer, etc. Let me use it.
- a stirrer such as a dissolver, a ball mill, a sand mill, an azimuth homomixer, etc. Let me use it.
- composition for sliding member By applying the composition for sliding member to the sliding member, a plurality of coating layers can be formed on the surface of the sliding member to obtain a sliding member with a coating.
- the application method to the sliding member is not particularly limited, and examples thereof include a spray method, a dipping method, a flow coating method, a dispenser method, and a spin coating method, and preferably a spray method.
- the viscosity can be adjusted with a solvent at the time of production of the coating composition or before application.
- the second coating layer is applied without drying, and then drying and baking are performed.
- a multilayer coating is formed on the surface of the sliding member.
- the drying temperature is 60 to 120.degree.
- the baking temperature for baking after drying is preferably 150 to 300 ° C., more preferably 180 to 250 ° C.
- the total film thickness after firing is preferably 10 to 80 ⁇ m, more preferably 20 to 40 ⁇ m.
- the sliding member After firing, the sliding member may be cooled and adjusted depending on the purpose.
- the technology of the present invention is applied to compressors and engine pistons of air conditioners, internal combustion engine parts, slide bearings, chains, solenoid valves for gas and liquid, plungers, valves and the like.
- Example 1 [Preparation of composition for sliding member] 1.
- Lower Layer Composition (1) Binder Resin: Polyamide imide (PAI) resin ("HPC-5012” manufactured by Hitachi Chemical Co., Ltd.) 60 parts by weight (2)
- Solid lubricant -Polytetrafluoroethylene (PTFE) ("Fluon L173J” manufactured by Asahi Glass Co., Ltd.) 40 parts by weight-Graphite ("HOP” manufactured by Japan Graphite Industry Co., Ltd.) 2 parts by weight (3)
- Solvent Mixed solvent of N-methyl-2-pyrrolidone and methyl isobutyl ketone
- Binder resin Polyamide imide (PAI) resin ("HPC-5012” manufactured by Hitachi Chemical Co., Ltd.) 90 parts by weight
- Solid lubricant Polytetrafluoroethylene (PTFE) ("Fluon L173J” manufactured by Asahi Glass Co., Ltd.) 10 parts by weight
- Graphite (“HOP” manufactured by Japan Graphite Industry Co., Ltd.) 2 parts by weight
- Solvent Mixed solvent of N-methyl-2-pyrrolidone and methyl isobutyl ketone
- composition for the lower layer is prepared, and the composition paint sufficiently mixed and dispersed by a ball mill is applied to a sliding member test piece (material A6061 disc) by spraying to form the lower layer.
- composition paint on the lower layer side was applied to a film thickness of 12 to 18 ⁇ m after firing.
- composition paint on the upper layer side was applied to a film thickness of 12 to 18 ⁇ m after firing. It baked at 200-230 ° C. according to the binder. The total film thickness was 25 to 35 ⁇ m.
- coated film-coated sliding member coated film-coated disc for testing was obtained as described above.
- Friction and wear characteristics Evaluation was carried out using a Suzuki type friction and wear tester ("EFM-III-EN" manufactured by ORIENTEC Co., Ltd.).
- Rz [DIN] 1.0 ⁇ 0.5 ⁇ m.
- Adhesion The surface property measurement device TYPE: 14FW (manufactured by Shinto Scientific Co., Ltd.) was used to evaluate in a ball-on-disk test.
- the mating material ball was made of material: SUS304, size: ⁇ 5 mm ball.
- a load 8 is applied from the top, and the slide is reciprocated 400 times with a width of 10 mm at a speed of 40 mm / s.
- the state of the sliding surface coating was observed, the presence or absence of peeling (destruction) was observed, and this was evaluated as adhesion, and the results are shown in Table 3.
- Example 2 to 4 A test in which two coating layers are formed in the same manner as in Example 1 except that the components for the lower layer composition and the upper layer composition are not replaced but the blending amounts are changed as shown in Table 3.
- a coated film-coated sliding member (coated film-coated disc) was obtained and evaluated in the same manner, and the results are shown in Table 3.
- Example 1 using the composition for the upper layer shown in Table 3, and similarly forming a coating film of a single layer, a sliding member with a coating (a disk with a coating) for test is obtained similarly It evaluated and the result was shown in Table 3.
- Comparative example 7 A test in which two coating layers are formed in the same manner as in Example 1 except that the components for the lower layer composition and the upper layer composition are not replaced but the blending amounts are changed as shown in Table 3.
- a coated film-coated sliding member (coated film-coated disc) was obtained and evaluated in the same manner, and the results are shown in Table 3.
- the concentration of the solid lubricant in the coating film layer far from the sliding member surface is higher than the concentration of the solid lubricant in the coating film layer near the sliding member surface It can be seen that both lubricity and adhesion are achieved (by inclining the composition concentration).
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- Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Sliding-Contact Bearings (AREA)
- Paints Or Removers (AREA)
Abstract
Description
(1)乾燥工程が必要となる。工程を追加しなければならず、ウエット・オン(ON)・ウエット塗布に比べ、コストがかかる。
(2)下層と上層で層が完全に分離しており、層間での密着性が低下したり、下層部に固体潤滑剤が無い為、上層が摩耗すると摺動性を失ってしまったりする。
(3)上層と下層の相溶性による混じり合いの恩恵が無い。
(4)ウエット・オン(ON)・ウエット塗布で、下層のみPAIとすると、下層と上層の収縮差が大きく、塗装面に割れが生じやすい。
前記摺動部材表面から遠い側の塗膜層内の固体潤滑剤の濃度が、前記摺動部材表面に近い側の塗膜層内の固体潤滑剤の濃度よりも高いことを特徴とする塗膜付摺動部材。
次いで該第1塗膜層を乾燥することなく、少なくともバインダー樹脂と固体潤滑剤を含む摺動部材用組成物(2)を前記第1塗膜層の上に塗布して第2塗膜層を形成し、その後乾燥して塗膜を形成する方法であって、
前記第1塗膜層における摺動部材用組成物(1)中の固体潤滑剤の配合割合Xが、5~35wt%の範囲であり、
前記第2塗膜層における摺動部材用組成物(2)中の固体潤滑剤の配合割合Yが、35~65wt%の範囲であり、
前記摺動部材用組成物(1)と前記摺動部材用組成物(2)に含まれる固体潤滑剤の配合割合の合計値(X+Y)が85以下であることを特徴とする塗膜形成方法。
本発明の塗膜付摺動部材は、少なくともバインダー樹脂と固体潤滑剤を含む摺動部材用組成物を用いて摺動部材表面に複数の塗膜層を形成してなり、前記摺動部材表面から遠い側の塗膜層内の固体潤滑剤の濃度が、前記摺動部材表面に近い側の塗膜層内の固体潤滑剤の濃度よりも高いことを特徴とする。
本発明の塗膜形成方法は、上記の塗膜付摺動部材における塗膜を形成する手法として好適である。
摺動部材用組成物を摺動部材に塗布することにより、摺動部材の表面に複数の塗膜層を形成させて塗膜付摺動部材を得ることができる。
[摺動部材用組成物の調製]
1.下層用組成物
(1)バインダー樹脂:
ポリアミドイミド(PAI)樹脂(日立化成工業社製「HPC-5012」) 60重量部
(2)固体潤滑剤:
・ポリテトラフルオロエチレン(PTFE)(旭硝子社製「フルオンL173J」) 40重量部
・グラファイト(日本黒鉛工業社製「HOP」) 2重量部
(3)溶剤:
N-メチル-2-ピロリドンとメチルイソブチルケトンの混合溶剤
(1)バインダー樹脂:
ポリアミドイミド(PAI)樹脂(日立化成工業社製「HPC-5012」) 90重量部
(2)固体潤滑剤:
・ポリテトラフルオロエチレン(PTFE)(旭硝子社製「フルオンL173J」) 10重量部
・グラファイト(日本黒鉛工業社製「HOP」) 2重量部
(3)溶剤:
N-メチル-2-ピロリドンとメチルイソブチルケトンの混合溶剤
1.摩擦摩耗特性
鈴木式摩擦摩耗試験機((株)オリエンテック製「EFM-III-EN」)を用いて評価した。
相手材リングは、材質:アルミ材(A6061)、大きさ:外径φ25.6mm、内径φ20mm、高さ40mmのものを使用した。このリングを粗さRz[DIN]=1.0±0.5μmの範囲で収まるように研磨する。
試験方法は、図1に示すように、まず、試験用の塗膜付摺動部材(塗膜付ディスク)1の試験摺動面4上にリング2をセットする。
下記表1に示す試験条件1に従い、上部から荷重3を掛け、ディスク1側を周速120mm/sのスピードで回転させる。試験時間は10時間、試験後のディスク摺動面4の摩耗深さを摩耗量として評価し、その結果を表3に示した。
表面性測定機TYPE:14FW(新東科学(株)製)を用い、ボールオンディスク試験で評価した。相手材ボールは材質:SUS304、大きさ:φ5mm球を使用した。
試験方法は、図2に示すように、まず、試験用の塗膜付摺動部材(塗膜付ディスク)5の試験摺動部7上にボール6をセットする。
下記表2に示す試験条件2に従い、上部から荷重8を掛け、幅10mmを40mm/sの速度で400回往復摺動させる。
試験後にその摺動面塗膜の状態を観察し、剥離(破壊)の有無を観察し、これを密着性として評価し、その結果を表3に示した。
実施例1において、下層用組成物及び上層用組成物の成分を代えることなく、配合量を表3に示すように代えた以外は同様にして、2層の塗膜層を形成してなる試験用の塗膜付摺動部材(塗膜付ディスク)を得、同様に評価し、その結果を表3に示した。
実施例1において、表3に示す上層用組成物を用い、単一層の塗膜を形成した以外は同様にして、試験用の塗膜付摺動部材(塗膜付ディスク)を得、同様に評価し、その結果を表3に示した。
実施例1において、下層用組成物及び上層用組成物の成分を代えることなく、配合量を表3に示すように代えた以外は同様にして、2層の塗膜層を形成してなる試験用の塗膜付摺動部材(塗膜付ディスク)を得、同様に評価し、その結果を表3に示した。
Claims (6)
- 少なくともバインダー樹脂と固体潤滑剤を含む摺動部材用組成物を用いて摺動部材表面に複数の塗膜層を形成してなり、
前記摺動部材表面から遠い側の塗膜層内の固体潤滑剤の濃度が、前記摺動部材表面に近い側の塗膜層内の固体潤滑剤の濃度よりも高いことを特徴とする塗膜付摺動部材。 - 複数の塗膜層が2層であり、2層の塗膜層における上層内の固体潤滑剤の濃度が、前記下層内の固体潤滑剤の濃度よりも高いことを特徴とする請求項1記載の塗膜付摺動部材。
- 複数の塗膜層に用いる摺動部材用組成物が、同じ成分であることを特徴とする請求項1又は2記載の塗膜付摺動部材。
- 少なくともバインダー樹脂と固体潤滑剤を含む摺動部材用組成物(1)を摺動部材に塗布して第1塗膜層を形成し、
次いで該第1塗膜層を乾燥することなく、少なくともバインダー樹脂と固体潤滑剤を含む摺動部材用組成物(2)を前記第1塗膜層の上に塗布して第2塗膜層を形成し、その後乾燥して塗膜を形成する方法であって、
前記第1塗膜層における摺動部材用組成物(1)中の固体潤滑剤の配合割合Xが、5~35wt%の範囲であり、
前記第2塗膜層における摺動部材用組成物(2)中の固体潤滑剤の配合割合Yが、35~65wt%の範囲であり、
前記摺動部材用組成物(1)と前記摺動部材用組成物(2)に含まれる固体潤滑剤の配合割合の合計値(X+Y)が85以下であることを特徴とする塗膜形成方法。 - 前記第1塗膜層と前記第2塗膜層に用いる摺動部材用組成物が、同じ成分であることを特徴とする請求項4記載の塗膜形成方法。
- 請求項4又は5記載の塗膜形成方法によって得られたことを特徴とする塗膜付摺動部材。
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JP2016519210A JP6650870B2 (ja) | 2014-05-16 | 2015-04-30 | 塗膜付摺動部材及び塗膜形成方法 |
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