WO2009081825A1 - スラスト軸受用摺動部材 - Google Patents
スラスト軸受用摺動部材 Download PDFInfo
- Publication number
- WO2009081825A1 WO2009081825A1 PCT/JP2008/073018 JP2008073018W WO2009081825A1 WO 2009081825 A1 WO2009081825 A1 WO 2009081825A1 JP 2008073018 W JP2008073018 W JP 2008073018W WO 2009081825 A1 WO2009081825 A1 WO 2009081825A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sliding member
- swash plate
- chemical conversion
- resin
- thrust bearing
- Prior art date
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/14—Polyamide-imides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/22—Orthophosphates containing alkaline earth metal cations
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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
- 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
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
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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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- 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
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- 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
- 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
- B05D3/02—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 baking
- B05D3/0254—After-treatment
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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
- 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
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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
- 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
- B05D7/50—Multilayers
- B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating
Definitions
- the present invention relates to a sliding member for a thrust bearing.
- a chemical conversion treatment film of zinc calcium phosphate and a resin film containing a thermosetting resin and a solid lubricant are formed on the iron base material. Excellent adhesion between the iron base material and the resin film.
- the present invention also relates to a thrust bearing sliding member having excellent heat resistance.
- thrust bearings are difficult to form a wedge oil film due to shaft rotation, and it is difficult to sufficiently supply lubricating oil to the sliding surface (thrust surface).
- the basic structure of the thrust bearing sliding member is a metallic substrate such as iron.
- the resin film containing a thermosetting resin and a solid lubricant are formed by forming a resin film containing a thermosetting resin and a solid lubricant.
- Such a thrust bearing sliding member is used, for example, in a swash plate of a swash plate compressor.
- the swash plate compressor compresses the gas in the cylinder by a piston that reciprocates in the cylinder following the rotating swash plate, and against the shoe that is the counterpart material interposed between the swash plate and the piston.
- the swash plate slides.
- the swash plate of this swash plate compressor rotates at a high speed and receives high pressure from the shoe.
- a thrust bearing sliding member used for a swash plate of a swash plate compressor is required to have high heat resistance because the sliding temperature may be as high as about 200 ° C.
- the resin film formed on the sliding member for the thrust bearing needs to have high heat resistance capable of withstanding a high temperature of about 200 ° C., and a thermosetting resin having high heat resistance is generally used as the resin component. Yes. Therefore, when manufacturing the thrust bearing sliding member, firing is performed at a temperature of 200 ° C. or higher in the final manufacturing process after the resin film is formed.
- the base material and the resin are used for the purpose of improving the adhesion between the metal substrate and the resin film and preventing seizure due to the exposure of the metal substrate.
- An intermediate layer is provided between the films.
- middle layer forming the metal intermediate
- a chemical conversion treatment method using a solution of manganese phosphate or zinc phosphate can be used. Attention has been focused on forming a chemical conversion treatment film of zinc phosphate (see, for example, Patent Document 1). JP 58-81220 A
- the resin film is fired at a temperature of 200 ° C. or higher in the final manufacturing process when the intermediate layer is formed by the metal spraying method or the metal sintering method although the cost is high. Even in such a case, there was no occurrence of blistering and the like, and a high heat resistant material that could withstand a high temperature of 200 ° C. or higher was easily obtained.
- the chemical conversion treatment film is thermally decomposed to generate gas during firing at a temperature of 200 ° C. or higher in the final manufacturing process. As a result, blistering and the like occurred, and a high heat resistant material that could withstand a high temperature of 200 ° C. or higher could not be obtained.
- an object of the present invention is to form an intermediate layer by a chemical conversion treatment method for cost reduction, and can be manufactured at a low cost.
- a chemical conversion treatment film, a thermosetting resin, and a solid can be produced on an iron substrate.
- An object of the present invention is to provide a highly heat-resistant sliding member for a thrust bearing which is formed with a resin film containing a lubricant and can withstand a high temperature of 200 ° C. or higher.
- the present inventors have found that the chemical conversion coating of zinc calcium phosphate has high heat resistance and is thermally decomposed during firing at a temperature of 200 ° C. or higher in the final production process.
- the present invention has been completed by finding that the resin layer does not occur and the resin layer does not bulge, and that the iron substrate and the resin layer can be firmly adhered to each other through the chemical conversion film.
- this invention provides the following sliding member for thrust bearings in order to achieve the said objective.
- a sliding member for a thrust bearing comprising a film.
- the thermosetting resin is a polyimide resin or a polyamideimide resin.
- the solid lubricant is at least one selected from the group consisting of fluorine-based resin, graphite, and molybdenum disulfide. Moving member.
- the chemical conversion treatment film of the intermediate layer does not thermally decompose to generate gas, and has excellent heat resistance that can withstand a high temperature of 200 ° C. or higher
- a sliding member for a thrust bearing is provided. Further, by performing shot blasting before chemical conversion treatment, the surface area of the base material is increased, and the adhesion between the iron base material and the chemical conversion treatment film is improved. Further, even when the base is exposed during sliding for a long time, the chemical conversion treatment film and the resin film are mixed, so that seizure hardly occurs compared to the case where the counterpart material is mainly iron.
- Example 6 is a graph showing a change over time in the temperature of the back surface of a shoe contacting the swash plate and a change over time in the friction coefficient of the swash plate in the high-pressure atmosphere friction wear test of the swash plate obtained in Example 1 and Comparative Example 2. It is the external appearance of the swash plate obtained in Example 1 after completion
- the iron base material used for the thrust bearing sliding member of the present invention those conventionally used as the iron base material of thrust bearing sliding members such as carbon steel can be appropriately used.
- the iron base material is subjected to shot blasting, and then a chemical conversion treatment film is formed thereon.
- This shot blasting can be performed by a well-known shot blasting method in which fine particles of a shot material are sprayed onto the surface of a substrate at a high pressure. Further, it is preferable that the surface roughness of the iron substrate is 1 to 15 ⁇ m Rz by this shot blasting treatment.
- the surface area of the iron base is increased, and the adhesion to the chemical conversion coating formed as an intermediate layer on the iron base is improved. Adhesion between the film and the resin film formed thereon is improved.
- the chemical conversion coating of zinc calcium phosphate formed as an intermediate layer on an iron substrate is an aqueous solution containing zinc ions, calcium ions and phosphate ions, that is, for forming a chemical conversion coating of zinc calcium phosphate.
- Formed using an aqueous solution of The method of forming the chemical conversion film is not particularly limited, but the iron base material subjected to the shot blast treatment may be dipped in the aqueous solution for forming the chemical conversion film, and then dried.
- the film thickness of the chemical conversion coating of zinc calcium phosphate to be formed can be appropriately set as necessary, but is preferably 10 ⁇ m or less (excluding 0 ⁇ m).
- a resin film containing a lubricant is formed.
- a thermosetting resin excellent in various heat resistance such as a polyimide resin conventionally used for a sliding member for a thrust bearing or a polyamideimide resin.
- a polyimide resin and a polyamideimide resin are preferably used, and a polyimide resin is particularly preferably used from the viewpoint of high-temperature sliding characteristics (particularly low friction).
- thermosetting resin one kind of thermosetting resin can be used alone, or a plurality of kinds can be mixed and used as necessary.
- thermosetting resin for example, “Trenice (registered trademark)” manufactured by Toray Industries, Inc. “U-Varnish” manufactured by Ube Industries, etc. can be preferably used.
- the content of the resin component in the resin film can be appropriately set as necessary, but is generally preferably 30 to 80% by volume, more preferably 40 to 70% by volume.
- solid lubricants in the resin film various types of fluorine-based resins such as polytetrafluoroethylene, graphite, molybdenum disulfide, tungsten disulfide, boron nitride, etc., which have been conventionally used for sliding members for thrust bearings.
- fluorine-based resin, graphite, and molybdenum disulfide are preferably used.
- the solid lubricant one kind of solid lubricant can be used alone, or a plurality of kinds can be mixed and used as necessary.
- the solid lubricant used preferably has an average particle size of 0.1 to 45 ⁇ m.
- particles such as titanium oxide, copper oxide, and alumina as a friction modifier may be added. These friction modifiers preferably have an average particle size of 1 nm to 10 ⁇ m.
- the content of the solid lubricant in the resin film can be appropriately set as necessary, but is generally preferably 20 to 70% by volume, more preferably 30 to 60% by volume.
- the resin film can be formed according to a conventional method for forming a resin film in the manufacture of a sliding member for a thrust bearing.
- a predetermined amount of a thermosetting resin and a solid lubricant and an appropriate amount of an organic solvent are mixed by a Henschel mixer, a super mixer, a ball mill, a tumbler mixer, a bead mill, a kneader, etc.
- a Henschel mixer a super mixer, a ball mill, a tumbler mixer, a bead mill, a kneader, etc.
- the organic solvent those capable of dissolving the thermosetting resin to be used can be used as appropriate, and N-methyl-2-pyrrolidone, xylene, alcohol or the like is used depending on the kind of the thermosetting resin. Can do.
- the usage-amount of an organic solvent can be suitably set according to the desired viscosity of the coating material for resin film formation obtained.
- the prepared resin film-forming paint is sprayed, roll coated, dipped, screen-printed, padded on the chemical conversion coating of zinc calcium phosphate of the intermediate layer formed on the iron substrate It can be applied by printing or the like, and the resin film-forming paint film can be dried and fired to form a resin film.
- the coating film of the resin film-forming coating material may be dried in a drying furnace, and the firing may be performed in an inert furnace at a temperature at 200 ° C. or higher and at a temperature at which the resin component and solid lubricating component of the coating material do not decompose.
- the film thickness of the resin film to be formed can be appropriately set as necessary, but is preferably 2 to 50 ⁇ m.
- the firing time is preferably 10 minutes to 2 hours depending on the firing temperature.
- the thrust bearing sliding member according to the present invention has been fired at a temperature of 200 ° C. or higher.
- the sliding member for a thrust bearing of the present invention can be widely and suitably applied to a swash plate of a swash plate compressor and sliding parts of various machines, for example, a sliding part of a thrust slide bearing such as a washer. Can be applied to.
- Example 1 An iron swash plate substrate having a surface roughness of 1 to 10 ⁇ m Rz that has been shot blasted is immersed in an aqueous solution of zinc calcium phosphate, and then dried in a drying furnace, and the zinc calcium phosphate film having a thickness of 3 ⁇ m is formed on the substrate. An intermediate layer of the chemical conversion coating was formed. Next, 60% by volume of polyamideimide resin (manufactured by Hitachi Chemical Co., Ltd.), 20% by volume of polytetrafluoroethylene (manufactured by Kitamura Co., Ltd.) and 20% by volume of graphite (manufactured by Nippon Graphite Co., Ltd.
- the organic solvent N-methyl-2-pyrrolidone was mixed with a kneader to prepare a resin film-forming coating material.
- the resin film-forming coating material is applied by roll coating on the intermediate layer of the zinc phosphate calcium chemical conversion coating on the iron swash plate substrate, and the resin film-forming coating material is applied to a drying oven. And dried. Thereafter, it was baked in an inert furnace at 270 ° C. for 1 hour.
- the fired resin film is subjected to a lathe process, and concentric continuous grooves having a depth of 1 to 10 ⁇ m and a pitch of 0.05 to 0.20 mm are formed on the surface of the resin film.
- a plate was made.
- the resin film was firmly adhered to the iron swash plate substrate through the zinc calcium phosphate chemical conversion treatment film.
- a photograph of the appearance of the obtained swash plate is shown in FIG.
- the obtained swash plate was subjected to a high-pressure atmosphere friction and wear test described later.
- Example 1 A swash plate was produced in the same manner as in Example 1 except that manganese phosphate was used in place of zinc calcium phosphate and an intermediate layer of the manganese phosphate chemical conversion coating was formed. In the obtained swash plate, the resin film was swollen, and the adhesion of the resin film to the iron swash plate substrate was poor. A photograph of the appearance of the obtained swash plate is shown in FIG.
- Example 2 a swash plate was produced in the same manner as in Example 1 except that the intermediate layer of the zinc phosphate calcium chemical conversion coating was not formed on the iron swash plate substrate. The obtained swash plate was subjected to the rotational load test described later.
- Adhesion strength test An adhesion strength test was performed on the swash plates obtained in Example 1 and Comparative Example 2 using a SHIMADZU autograph. Test conditions: A jig was affixed to the resin film surface of the swash plate with an adhesive, and the jig was pulled outward in the radial direction of the swash plate. ⁇ Test results ⁇ The test results are shown in Table 1.
- FIG. 7 shows a graph of the change over time in the temperature of the back surface of the shoe 3 in contact with the swash plate 2 and the change over time in the friction coefficient of the swash plate 2 in the high-pressure atmosphere friction wear test. From the graph of FIG. 7, the swash plate obtained in Example 1 is more time-dependent than the swash plate obtained in Comparative Example 2 for both the time-dependent change in the temperature of the back surface of the shoe and the change in the coefficient of friction over time. It is clear that the change is small and it can be used stably over a long period of time.
- FIG. 8 shows the appearance of the swash plate obtained in Example 1 after the end of the rotational load test
- FIG. 9 shows the appearance of the swash plate obtained in Comparative Example 2 after the end of the rotational load test. Indicated.
- (a) is the entire appearance
- (b) is an enlarged portion of the appearance.
- the iron base material is exposed in the swash plate of Comparative Example 2, which causes seizure. Therefore, it is clear that the swash plate obtained in Example 1 has much less damage to the resin film after use than the swash plate obtained in Comparative Example 2, and these figures also show a long period of time. It is clear that it can be used stably.
- FIG. 10 shows the appearance of the swash plate obtained in Example 1 after the end of the rotational load test.
- (a) is the same appearance as in FIG. 8, and (b) is (C) is an enlarged portion with magnification of 500 times with an external scanning electron microscope, (d) is an analysis result of C component of a swash plate by EDX.
- (E) is the analysis result of the Zn component of the swash plate by EDX.
- the swash plate obtained in Example 1 has a zinc calcium phosphate chemical conversion treatment layer exposed, but has a greater effect on sliding performance than Comparative Example 2 in which the iron base material is exposed. It is clear that there is no.
- the chemical conversion treatment film of the intermediate layer does not thermally decompose to generate gas, and has excellent heat resistance that can withstand a high temperature of 200 ° C. or higher
- a sliding member for a thrust bearing is provided. Further, by performing shot blasting before chemical conversion treatment, the surface area of the base material is increased, and the adhesion between the iron base material and the chemical conversion treatment film is improved. Further, even when the base is exposed during sliding for a long time, the chemical conversion treatment film and the resin film are mixed, so that seizure hardly occurs compared to the case where the counterpart material is mainly iron.
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Abstract
Description
(1)ショットブラスト処理を行った鉄基材上に、リン酸亜鉛カルシウムの化成処理皮膜を形成し、さらに200℃以上の温度での焼成が必要な熱硬化性樹脂及び固体潤滑剤を含む樹脂皮膜を形成してなることを特徴とするスラスト軸受用摺動部材。
(2)前記熱硬化性樹脂が、ポリイミド樹脂又はポリアミドイミド樹脂であることを特徴とする上記(1)に記載のスラスト軸受用摺動部材。
(3)前記固体潤滑剤が、フッ素系樹脂、黒鉛、及び二硫化モリブデンからなる群より選ばれた少なくとも一種であることを特徴とする上記(1)又は(2)に記載のスラスト軸受用摺動部材。
また、化成処理前にショットブラスト処理をすることで基材の表面積が増大し、鉄基材と化成処理皮膜との密着性が向上する。
さらに、長時間使用により摺動時に下地が露出した場合であっても、化成処理皮膜と樹脂皮膜が混在しているため、相手材が主に鉄の場合に比べて焼付きが起こりにくい。すなわち、鉄基材のショットブラスト処理で生じた凹凸のある表面の凸部において、樹脂皮膜も化成処理皮膜も摩耗してしまって鉄基材が露出しても、凹凸のある表面の凹部には化成処理皮膜あるいは樹脂皮膜と化成処理皮膜の両方が残存しているため、ショットブラスト処理されてない平滑な鉄基材の表面が露出した場合に比べて、相手材との焼付きが起こりにくい。
2 斜板
3 シュー
4 受治具
5 固定軸
温度範囲26~350℃、昇温速度15cel/min、N2雰囲気下にて、リン酸亜鉛カルシウム、リン酸マンガン、リン酸亜鉛について示差熱分析を行った。リン酸亜鉛カルシウムの示差熱分析結果のグラフを示せば図1のとおりであり、リン酸マンガンの示差熱分析結果のグラフを示せば図2のとおりであり、リン酸亜鉛の示差熱分析結果のグラフを示せば図3のとおりである。
これらの示差熱分析結果のグラフから明らかなように、リン酸亜鉛カルシウムでは350℃に達しても熱分解は起こらず、リン酸マンガンでは約200℃で熱分解が起こり、リン酸亜鉛では約170℃で熱分解が起こることが分かった。
ショットブラスト処理をした表面粗さ1~10μmRzの鉄斜板基材を、リン酸亜鉛カルシウムの水溶液に浸漬し、その後乾燥炉にて乾燥し、該基材上に膜厚3μmのリン酸亜鉛カルシウム化成処理皮膜の中間層を形成した。次いで、ポリアミドイミド樹脂(日立化成社製)60容量%と、ポリテトラフルオロエチレン(喜多村社製)20容量%と、グラファイト(日本黒鉛社製(平均粒径1μm))20容量%を、適量の有機溶剤のN-メチル-2-ピロリドンと共に、混練機で混合して、樹脂皮膜形成用塗料を調製した。この樹脂皮膜形成用塗料を、上記鉄斜板基材のリン酸亜鉛カルシウム化成処理皮膜の中間層の上に、ロールコートにて塗布し、その樹脂皮膜形成用塗料の塗膜を、乾燥炉にて乾燥した。その後、イナート炉にて270℃、1時間焼成した。焼成完了後の樹脂皮膜に対して旋盤加工を施し、深さ1~10μm、ピッチ0.05~0.20mmの同心円状の連続する溝を樹脂皮膜表面に形成して、斜板式コンプレッサー用の斜板を作製した。
得られた斜板は、樹脂皮膜が鉄斜板基材にリン酸亜鉛カルシウム化成処理皮膜を介して強固に密着されていた。得られた斜板の外観の写真を図4に示した。また、得られた斜板について後記高圧雰囲気摩擦摩耗試験を行った。
実施例1において、リン酸亜鉛カルシウムに代えてリン酸マンガンを用い、リン酸マンガン化成処理皮膜の中間層を形成したこと以外は、実施例1と同様にして斜板を作製した。
得られた斜板は、樹脂皮膜に膨れが生じていて、樹脂皮膜の鉄斜板基材への密着性が不良であった。得られた斜板の外観の写真を図5に示した。
実施例1において、鉄斜板基材にリン酸亜鉛カルシウム化成処理皮膜の中間層を形成しなかったこと以外は、実施例1と同様にして斜板を作製した。
得られた斜板について後記の回転荷重試験を行った。
SHIMADZU製オートグラフを用い、実施例1及び比較例2で得られた斜板について、密着強度試験を行った。
試験条件:斜板の樹脂皮膜表面に、治具を接着剤で貼付し、この治具を斜板の半径方向外側に引っ張った。
〔試験結果〕
試験結果を表1に示す。
図6に示す高圧雰囲気摩擦摩耗試験装置1を用い、実施例1及び比較例2で得られた斜板について、下記条件により高圧雰囲気摩擦摩耗試験を行った。この試験装置では、回転軸1の下部に斜板2を取付けるとともに、受治具4の上面に3個のシュー3を載置し、固定軸5より上向きに荷重を加えるようになっている。そして、回転軸1を回転させると、斜板2がシュー3に対して回転する仕組みとなっている。
試験条件:回転数を1000rpm一定とした。荷重は7.5MPaで保持した。試験時間は360分間とした。
潤滑条件:冷媒雰囲気ドライ条件
〔評価基準と試験結果〕
評価基準:1000rpm、7.5MPa、360分完走で合格(クリア)
試験結果:実施例1=クリア
比較例2=68分で焼付き
また、化成処理前にショットブラスト処理をすることで基材の表面積が増大し、鉄基材と化成処理皮膜との密着性が向上する。
さらに、長時間使用により摺動時に下地が露出した場合であっても、化成処理皮膜と樹脂皮膜が混在しているため、相手材が主に鉄の場合に比べて焼付きが起こりにくい。すなわち、鉄基材のショットブラスト処理で生じた凹凸のある表面の凸部において、樹脂皮膜も化成処理皮膜も摩耗してしまって鉄基材が露出しても、凹凸のある表面の凹部には化成処理皮膜あるいは樹脂皮膜と化成処理皮膜の両方が残存しているため、ショットブラスト処理されてない平滑な鉄基材の表面が露出した場合に比べて、相手材との焼付きが起こりにくい。
Claims (3)
- ショットブラスト処理を行った鉄基材上に、リン酸亜鉛カルシウムの化成処理皮膜を形成し、さらに200℃以上の温度での焼成が必要な熱硬化性樹脂及び固体潤滑剤を含む樹脂皮膜を形成してなることを特徴とするスラスト軸受用摺動部材。
- 前記熱硬化性樹脂が、ポリイミド樹脂又はポリアミドイミド樹脂であることを特徴とする請求項1に記載のスラスト軸受用摺動部材。
- 前記固体潤滑剤が、フッ素系樹脂、黒鉛、及び二硫化モリブデンからなる群より選ばれた少なくとも一種であることを特徴とする請求項1又は2に記載のスラスト軸受用摺動部材。
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CN2008801218834A CN101903666A (zh) | 2007-12-21 | 2008-12-17 | 推力轴承用滑动构件 |
EP08864443.0A EP2224146A4 (en) | 2007-12-21 | 2008-12-17 | SLIDING ELEMENT FOR THRUST BEARING |
US12/809,272 US20110052112A1 (en) | 2007-12-21 | 2008-12-17 | Sliding member for thrust bearing |
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JP2007-330698 | 2007-12-21 | ||
JP2007330698A JP2009150518A (ja) | 2007-12-21 | 2007-12-21 | スラスト軸受用摺動部材 |
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US (1) | US20110052112A1 (ja) |
EP (1) | EP2224146A4 (ja) |
JP (1) | JP2009150518A (ja) |
KR (1) | KR20100092026A (ja) |
CN (1) | CN101903666A (ja) |
WO (1) | WO2009081825A1 (ja) |
Cited By (1)
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JP2014189593A (ja) * | 2013-03-26 | 2014-10-06 | Taiho Kogyo Co Ltd | 摺動部材 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102345678B (zh) * | 2011-06-17 | 2013-04-10 | 浙江长盛滑动轴承股份有限公司 | 改性聚酰亚胺耐磨层的三层复合自润滑滑动轴承及其制作方法 |
JP5767959B2 (ja) * | 2011-12-22 | 2015-08-26 | 大豊工業株式会社 | 摺動部材 |
DE102012000658A1 (de) * | 2012-01-14 | 2013-07-18 | Daimler Ag | Metallisches Trägerbauteil mit Verbundhaftungsoberfläche, Hybridbauteil und Herstellungsverfahren |
JP5713074B2 (ja) * | 2013-09-27 | 2015-05-07 | 千住金属工業株式会社 | 摺動部材 |
JP2015142962A (ja) * | 2014-01-31 | 2015-08-06 | トーカロ株式会社 | 非粘着性複合樹脂皮膜被覆ロール |
JP6961492B2 (ja) | 2015-04-15 | 2021-11-05 | ヘンケル・アクチェンゲゼルシャフト・ウント・コムパニー・コマンディットゲゼルシャフト・アウフ・アクチェンHenkel AG & Co. KGaA | ポリアミドアミンポリマーを用いる薄い腐食保護コーティング |
JP2018035838A (ja) * | 2016-08-30 | 2018-03-08 | 大豊工業株式会社 | スラストワッシャ |
JP6813341B2 (ja) * | 2016-11-17 | 2021-01-13 | 大豊工業株式会社 | 樹脂組成物および摺動部材 |
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JPS5881220A (ja) | 1981-11-10 | 1983-05-16 | Taiho Kogyo Co Ltd | スラスト軸受 |
JPH11106775A (ja) * | 1997-10-03 | 1999-04-20 | Taiho Kogyo Co Ltd | 固体潤滑被膜組成物及びそれを用いた滑り軸受材料 |
JP2002061652A (ja) * | 2000-08-15 | 2002-02-28 | Taiho Kogyo Co Ltd | すべり軸受 |
JP2004263727A (ja) * | 2003-02-17 | 2004-09-24 | Taiho Kogyo Co Ltd | すべり軸受 |
JP2006144038A (ja) * | 2004-11-16 | 2006-06-08 | Nippon Steel Corp | 樹脂ライニング鋼管およびその製造方法 |
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JPH11106779A (ja) * | 1997-10-03 | 1999-04-20 | Taiho Kogyo Co Ltd | 固体潤滑被膜組成物及びそれを用いた滑り軸受材料 |
US6921205B2 (en) * | 2001-03-16 | 2005-07-26 | Taiho Kogyo Co., Ltd. | Sliding material |
JP4285634B2 (ja) * | 2003-02-20 | 2009-06-24 | 大同メタル工業株式会社 | 摺動部材 |
US7786637B2 (en) * | 2004-12-01 | 2010-08-31 | Jtekt Corporation | Touchdown bearing |
JP2007203125A (ja) * | 2006-01-30 | 2007-08-16 | Sanden Corp | 摺動部材 |
-
2007
- 2007-12-21 JP JP2007330698A patent/JP2009150518A/ja active Pending
-
2008
- 2008-12-17 CN CN2008801218834A patent/CN101903666A/zh active Pending
- 2008-12-17 US US12/809,272 patent/US20110052112A1/en not_active Abandoned
- 2008-12-17 WO PCT/JP2008/073018 patent/WO2009081825A1/ja active Application Filing
- 2008-12-17 EP EP08864443.0A patent/EP2224146A4/en not_active Withdrawn
- 2008-12-17 KR KR1020107013769A patent/KR20100092026A/ko not_active Application Discontinuation
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JPS5881220A (ja) | 1981-11-10 | 1983-05-16 | Taiho Kogyo Co Ltd | スラスト軸受 |
JPH11106775A (ja) * | 1997-10-03 | 1999-04-20 | Taiho Kogyo Co Ltd | 固体潤滑被膜組成物及びそれを用いた滑り軸受材料 |
JP2002061652A (ja) * | 2000-08-15 | 2002-02-28 | Taiho Kogyo Co Ltd | すべり軸受 |
JP2004263727A (ja) * | 2003-02-17 | 2004-09-24 | Taiho Kogyo Co Ltd | すべり軸受 |
JP2006144038A (ja) * | 2004-11-16 | 2006-06-08 | Nippon Steel Corp | 樹脂ライニング鋼管およびその製造方法 |
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JP2014189593A (ja) * | 2013-03-26 | 2014-10-06 | Taiho Kogyo Co Ltd | 摺動部材 |
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CN101903666A (zh) | 2010-12-01 |
JP2009150518A (ja) | 2009-07-09 |
US20110052112A1 (en) | 2011-03-03 |
EP2224146A1 (en) | 2010-09-01 |
KR20100092026A (ko) | 2010-08-19 |
EP2224146A4 (en) | 2016-12-28 |
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