JP2006037997A - Sliding component and its manufacturing method - Google Patents

Sliding component and its manufacturing method Download PDF

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JP2006037997A
JP2006037997A JP2004214698A JP2004214698A JP2006037997A JP 2006037997 A JP2006037997 A JP 2006037997A JP 2004214698 A JP2004214698 A JP 2004214698A JP 2004214698 A JP2004214698 A JP 2004214698A JP 2006037997 A JP2006037997 A JP 2006037997A
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oil
sliding
lubricating coating
coating
component
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JP4430999B2 (en
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Yoshitsugu Tsuchiya
嘉嗣 土屋
Keiichi Uemoto
圭一 上本
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Sumitomo Electric Sintered Alloy Ltd
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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
    • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/023—Multi-layer lubricant coatings
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Sliding-Contact Bearings (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding component formed of an iron alloy with a sliding coating on the surface for maintaining sliding property for a long period. <P>SOLUTION: A chemical conversion coating 2 and a lubricating coating 3 are laminated in sequence on the surface of the sliding component such as a seat belt latch 1 formed of an iron alloy. The lubricating coating 3 is formed of a material which is chemically stable to oil and which contains a solid lubricant, rust preventives and a binder, and it has fine cavities 4 communicated with the outside. After the lubricating coating 3 is formed, oil dipping treatment is given to the component to soak the cavities 4 with oil. The oil improves rest preventing effects to maintain the sliding property for a long period. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、鉄合金で形成される摺動部品、特に、優れた摺動特性が長期にわたって発揮される摺動部品とその摺動部品の製造方法に関する。   The present invention relates to a sliding component formed of an iron alloy, and more particularly, to a sliding component that exhibits excellent sliding characteristics over a long period of time and a method for manufacturing the sliding component.

例えば、自動車のシートベルトの留め金に係止させて留め金をロック点に保持するラッチは、常時は勿論、非常時にも留め金のロックをスムーズに解除可能となすために、優れた摺動特性を持ち、給油無しで使用できることが要求される。   For example, the latch that holds the clasp at the lock point by locking it to the clasp of the seatbelt of an automobile has excellent sliding properties so that the clasp lock can be released smoothly in an emergency as well as at any time. It must have characteristics and be usable without refueling.

その給油無しでの使用の要求に応える方法として、部品の表面に化成処理被膜を形成し、その化成処理被膜上に固体潤滑剤粒子とバインダと防錆剤とを含有する潤滑被膜を設ける方法がある（例えば、下記特許文献１参照）。   As a method to meet the demand for use without lubrication, there is a method in which a chemical conversion treatment film is formed on the surface of a component, and a lubricant film containing solid lubricant particles, a binder, and a rust preventive agent is provided on the chemical conversion treatment film. (For example, see Patent Document 1 below).

また、粉末冶金法で製造される焼結部品は、機械加工品に比べて生産性やコストに優れることから、前述のシートベルト用ラッチもこの焼結部品で形成することが望まれている。   In addition, a sintered part manufactured by the powder metallurgy method is superior in productivity and cost as compared with a machined product. Therefore, it is desired that the above-described seat belt latch is also formed of this sintered part.

ところが、シートベルト用ラッチなどを安価な鉄系焼結合金で形成すると、特許文献１などが開示している潤滑被膜だけではそのラッチに要求される優れた摺動特性を長期にわたって維持することができない。   However, if the seat belt latch or the like is formed of an inexpensive iron-based sintered alloy, the excellent sliding characteristics required for the latch can be maintained for a long time only by the lubricating coating disclosed in Patent Document 1 and the like. Can not.

固体潤滑剤粒子とバインダと防錆剤とを含有する潤滑被膜は、特許文献１が述べているように、バインダを溶剤に溶解した中に固体潤滑剤粒子と防錆剤を分散させて得られる塗料を、スプレー塗装法や、ディップ法、タンブリング法などの方法で下地面に塗布し、これを乾燥、焼成処理して形成する。   A lubricant film containing solid lubricant particles, a binder, and a rust preventive agent is obtained by dispersing solid lubricant particles and a rust preventive agent in a binder dissolved in a solvent, as described in Patent Document 1. The paint is applied to the base surface by a spray coating method, a dip method, a tumbling method or the like, and this is dried and fired to form.

この方法で形成される潤滑被膜は材料の微細な塊をランダムに積み重ねたような構造（以下これを積層構造と言う）になり、水分の浸透を許容する微細な空隙が層間にできる。水分の浸透が許容されると潤滑被膜に防錆剤を含ませていても高い防錆効果を期待できず、特に鉄系焼結合金で形成された摺動部品であると錆が発生しやすい。その錆によって部品の摩擦係数が変化し、摺動抵抗が増加して部品の滑り性が悪くなり易い。   The lubricating film formed by this method has a structure in which fine lumps of material are randomly stacked (hereinafter referred to as a laminated structure), and fine voids that allow moisture permeation are formed between the layers. If moisture permeation is allowed, a high anti-rust effect cannot be expected even if the lubricant film contains a rust preventive, and rust is likely to occur especially when the sliding parts are made of an iron-based sintered alloy. . The friction coefficient of the part changes due to the rust, the sliding resistance increases, and the slipperiness of the part tends to deteriorate.

このことが、シートベルト用ラッチを、焼結合金で形成する場合の課題となっていた。
特開２００３−１５６５７５号公報 This has been a problem when the seat belt latch is formed of a sintered alloy.
JP 2003-156575 A

この発明は、鉄合金で形成されて表面に積層構造の摺動被膜が形成された摺動部品の防錆性能を向上させてこの摺動部品の優れた摺動特性を長期にわたって維持できるようにすることを課題としている。   This invention improves the rust prevention performance of a sliding part formed of an iron alloy and has a laminated structure sliding coating on its surface so that the excellent sliding characteristics of this sliding part can be maintained over a long period of time. The challenge is to do.

上記の課題を解決するため、この発明においては、鉄合金で形成される部品の表面に化成処理被膜と潤滑被膜を順に積層して設け、前記潤滑被膜は、固体潤滑剤と防錆剤とバインダとを含有する、油に対して化学的に安定した材料で形成され、外部に通じる微細な空隙ができており、
この潤滑被膜を形成した後、部品を油漬処理することを特徴とする摺動部品の製造方法を提供する。 In order to solve the above problems, in the present invention, a chemical conversion treatment film and a lubricant film are sequentially laminated on the surface of a component formed of an iron alloy, and the lubricant film includes a solid lubricant, a rust inhibitor, and a binder. Is made of a material that is chemically stable to oil and contains fine voids that lead to the outside.
Provided is a method for manufacturing a sliding component, wherein the lubricating coating is formed after the lubricating coating is formed.

化成処理被膜と潤滑被膜は、鉄系焼結合金で形成した部品である場合には、樹脂含浸などによる封孔処理を施し、その後に部品の表面にこの化成処理被膜と潤滑被膜を形成するのがよい。   In the case where the chemical conversion coating and the lubricating coating are parts formed of an iron-based sintered alloy, the chemical conversion coating and the lubricating coating are formed on the surface of the component after sealing with resin impregnation. Is good.

また、潤滑被膜の層間の空隙の大きさは、好ましくは０．０５μｍ〜１０μｍ、より好ましくは０．０５μｍ〜２μｍの範囲にあるようにするのがよい。   In addition, the size of the gap between the layers of the lubricating coating is preferably 0.05 μm to 10 μm, more preferably 0.05 μm to 2 μm.

なお、この方法で得られる摺動部品は、表面に化成処理被膜とその化成処理被膜上に形成された潤滑被膜とを有し、前記潤滑被膜は固体潤滑剤と防錆剤とバインダとを含有する、油に対して化学的に安定した材料で形成され、外部に通じる微細な空隙ができており、この潤滑被膜の前記空隙に油がしみ込んだものになる。この発明では、その焼結摺動部品も併せて提供する。   The sliding component obtained by this method has a chemical conversion coating on the surface and a lubricating coating formed on the chemical conversion coating, and the lubricating coating contains a solid lubricant, a rust inhibitor, and a binder. It is formed of a material that is chemically stable with respect to oil and has fine voids that lead to the outside. Oil is soaked into the voids of the lubricating coating. In the present invention, the sintered sliding component is also provided.

固体潤滑剤と防錆剤とバインダとを含有する潤滑被膜は、微細な塊となった材料が層状に積み重なり、層間に空隙を有したものになっている。また、この潤滑被膜は油に対して化学的に安定した材料で形成されている。この発明ではその潤滑被膜を形成した後に摺動部品を油に漬けて層間の空隙に油をしみ込ませており、空隙に保持された油が外部からの水分及び酸素の進入を抑制する。このために、部品の防錆力が向上し、錆による摺動抵抗の増加が抑制されて良好な摺動特性が長期にわたって維持される。   A lubricating coating containing a solid lubricant, a rust inhibitor, and a binder is a material in which fine lumps are stacked in layers and have voids between the layers. The lubricating coating is made of a material that is chemically stable against oil. In this invention, after the lubricating coating is formed, the sliding part is immersed in oil so that the oil is soaked into the gaps between the layers, and the oil held in the gaps suppresses the entry of moisture and oxygen from the outside. For this reason, the rust prevention power of the parts is improved, an increase in sliding resistance due to rust is suppressed, and good sliding characteristics are maintained for a long time.

なお、潤滑被膜の層間の空隙の大きさを０．０５μｍ〜１０μｍにすると、毛管現象が起こり、部品を単に油に漬けるだけの簡単な方法で空隙に油を確実にしみ込ませることができる。   When the size of the gap between the layers of the lubricating coating is set to 0.05 μm to 10 μm, capillary action occurs, and the oil can be reliably impregnated into the gap by a simple method in which the part is simply immersed in oil.

以下、この発明の実施の形態を添付図面の図１及び図２に基づいて説明する。図１に、この発明を適用したシートベルト用ラッチの外観を示す。このシートベルト用ラッチ１は、例えば、Ｆｅ−Ｃｕ系合金やＦｅ−Ｎｉ−Ｃ系合金、Ｆｅ−Ｎｉ−Ｃｕ−Ｃ系合金などの鉄系焼結合金で形成されている。   Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings. FIG. 1 shows the appearance of a seatbelt latch to which the present invention is applied. The seat belt latch 1 is formed of, for example, an iron-based sintered alloy such as an Fe—Cu alloy, an Fe—Ni—C alloy, or an Fe—Ni—Cu—C alloy.

この鉄系焼結合金からなるシートベルト用ラッチ１の表面に、図２に示すように化成処理被膜２を設け、その化成処理被膜２上にさらに潤滑被膜３を設けている。ラッチ１は、焼結後に焼結空孔の封孔処理を実施し、その後に化成処理被膜２と潤滑被膜３を施すのがよい。封孔処理は、樹脂を含浸させるなどの一般的な方法で実施できる。   As shown in FIG. 2, a chemical conversion treatment film 2 is provided on the surface of the seat belt latch 1 made of an iron-based sintered alloy, and a lubricating coating 3 is further provided on the chemical conversion treatment film 2. The latch 1 is preferably subjected to a sealing treatment for sintered pores after sintering, and then a chemical conversion coating 2 and a lubricating coating 3 are applied. The sealing treatment can be performed by a general method such as impregnation with a resin.

化成処理被膜２は、ラッチ１に対する潤滑被膜３の密着性を高めるためのアンカー層として設ける膜であり、リン酸亜鉛被膜、リン酸マンガン被膜などのリン酸塩被膜、クロメート処理被膜、ケイ酸塩被膜などを採用することができる。   The chemical conversion coating 2 is a film provided as an anchor layer for enhancing the adhesion of the lubricating coating 3 to the latch 1, and is a phosphate coating such as a zinc phosphate coating or a manganese phosphate coating, a chromate treatment coating, or a silicate. A film or the like can be employed.

潤滑被膜３は、固体潤滑剤と防錆剤とバインダとを含有する。この潤滑被膜３に含ませる固体潤滑剤としては、二硫化モリブデンなどの硫化物粒子、フッ化黒鉛の粒子、フッ素系高分子の粒子などを使用することができる。   The lubricating coating 3 contains a solid lubricant, a rust inhibitor, and a binder. As the solid lubricant to be included in the lubricating coating 3, sulfide particles such as molybdenum disulfide, graphite fluoride particles, fluorine polymer particles, and the like can be used.

また、防錆剤としては、クロム酸塩系顔料、金属粉末系顔料、無公害顔料などの防錆顔料を使用することができる。無公害顔料の具体例としては、リン酸アルミニウム、モリブデン酸亜鉛、リン酸亜鉛などが挙げられる。   Moreover, as a rust preventive agent, rust preventive pigments such as chromate pigments, metal powder pigments, and non-polluting pigments can be used. Specific examples of pollution-free pigments include aluminum phosphate, zinc molybdate, and zinc phosphate.

バインダは、エポキシ系樹脂、ビニル系樹脂、アルキド系樹脂、ウレタン系樹脂、ポリエステル系樹脂、アクリル系樹脂、フェノール系樹脂などの一般的な樹脂でよい。   The binder may be a general resin such as an epoxy resin, a vinyl resin, an alkyd resin, a urethane resin, a polyester resin, an acrylic resin, or a phenol resin.

このバインダを溶剤に溶かし、その中に固体潤滑剤と防錆剤を分散させて塗料を得る。そして、この塗料を好ましくはスプレー塗装や重ね塗りなどの方法で化成処理被膜２上に塗布し、乾燥、焼成処理を行う。この方法で得られる潤滑被膜３は、材料が微細な塊になって積層され、層間（塊と塊の間）に外部に通じる微細な空隙４ができる。   This binder is dissolved in a solvent, and a solid lubricant and a rust inhibitor are dispersed therein to obtain a paint. And this coating material is preferably apply | coated on the chemical conversion treatment film 2 by methods, such as spray coating and recoating, and a drying and baking process are performed. The lubricating coating 3 obtained by this method is formed by laminating the material into fine lumps, and fine voids 4 communicating with the outside are formed between the layers (between the lumps).

その空隙４は、サイズが０．０５μｍ〜１０μｍの範囲にあると、潤滑被膜３の厚みが一般的な厚み、例えば２０μｍ未満である場合、油を毛管現象で空隙４に吸い込むことができる。   If the size of the gap 4 is in the range of 0.05 μm to 10 μm, oil can be sucked into the gap 4 by capillary action when the thickness of the lubricating coating 3 is a typical thickness, for example, less than 20 μm.

油の分子の大きさは０．０５μｍ程度と考えられるので、空隙４の大きさが０．０５μｍ以下では空隙への油の吸い込みを期待し難い。この空隙４の大きさが０．０５μｍ以上、１０μｍ以下であれば毛管現象による油の吸い込みがなされ、潤滑被膜３形成後の摺動部品を単に油に漬ける方法で空隙４に油をしみ込ませて防錆効果を高めることができる。なお、空隙４のサイズは２μｍ以下が特に好ましい。   Since the size of the oil molecule is considered to be about 0.05 μm, it is difficult to expect the oil to be sucked into the gap when the size of the gap 4 is 0.05 μm or less. If the size of the gap 4 is 0.05 μm or more and 10 μm or less, oil is sucked by capillary action, so that the sliding part after the formation of the lubricating coating 3 is soaked in oil by simply soaking the oil in the gap 4. Rust prevention effect can be enhanced. The size of the gap 4 is particularly preferably 2 μm or less.

潤滑被膜３形成後の摺動部品を油に漬けて潤滑被膜３の層間に生じている空隙に油をしみ込ませる。このときの浸漬時間は５分以下でよい。   The sliding part after the formation of the lubricating coating 3 is immersed in oil so that the oil is soaked into the gaps formed between the layers of the lubricating coating 3. The immersion time at this time may be 5 minutes or less.

空隙４にしみ込ませる油は、合成エステル３〜９ｗｔ％、残石油系炭化水素の成分の油（例えば商品名：ダイラスト Ｄ−３５Ｋ 大同化学工業（株）製 ）、石油系炭化水素が主成分の工業用原料油（商品名：コスモピュアセイフティー１０ コスモ石油（株）製）、あるいは濃縮防錆油（商品名Ｎｏｘ−Ｒｕｓｔ パーカー興産株式会社製）などが挙げられるが、これに限定されるものではない。防錆効果が得られるものであればよく、その種類は特に問わない。 The oil to be impregnated into the gap 4 is 3 to 9 wt% of synthetic ester, oil of residual petroleum hydrocarbon component (for example, trade name: D.D. Industrial oil (trade name: Cosmo Pure Safety 10 manufactured by Cosmo Oil Co., Ltd.) or concentrated rust preventive oil (trade name: Nox-Rust Parker Kosan Co., Ltd. ), etc. It is not a thing. Any type can be used as long as the antirust effect can be obtained.

この発明は、例示のシートベルト用ラッチに限らず、分散した材料が積層された構造の潤滑被膜が表面に形成される鉄合金製摺動部品の全てに有効に適用できる。ラッチ以外の摺動部品としては、例えば、シートベルト用プレートロックなどがあり、このような部品に対してもこの発明の有効性が発揮される。   The present invention is not limited to the illustrated seat belt latch, and can be effectively applied to all of the sliding parts made of iron alloy on which a lubricating coating having a structure in which dispersed materials are stacked is formed. Examples of the sliding parts other than the latch include a seat belt plate lock, and the effectiveness of the present invention is also exhibited for such parts.

この発明のより詳細な実施例を以下に挙げる。
４ｗｔ％Ｎｉ−１．５ｗｔ％Ｃｕ−０．５ｗｔ％Ｍｏ−０．６ｗｔ％Ｃ−０．６ｗｔ％固体潤滑剤−残Ｆｅの混合原料を成形して焼結し、テスト用の摺動部品を作った。次に、この摺動部品にアクリル樹脂を含浸させて焼結空孔の封孔処理を行い、その後、この部品の表面に化成処理被膜として厚さ約５μｍのリン酸マンガンの被膜を形成し、さらに、そのリン酸マンガンの被膜上に潤滑被膜を形成した。 More detailed examples of this invention are given below.
4wt% Ni-1.5wt% Cu-0.5wt% Mo-0.6wt% C-0.6wt% solid lubricant-residual Fe mixed raw material is molded and sintered, and sliding parts for testing are prepared. Had made. Next, this sliding component is impregnated with acrylic resin to perform sealing treatment of sintered pores, and then a manganese phosphate coating having a thickness of about 5 μm is formed as a chemical conversion coating on the surface of the component, Further, a lubricating coating was formed on the manganese phosphate coating.

潤滑被膜は、バインダのエポキシ系樹脂と硬化剤をメチルエチルケトンに溶解して得られる溶液の中に固体潤滑剤としての二硫化モリブデンと防錆剤としてのクロム酸塩を分散したバインダ濃度１８ｗｔ％、二硫化モリブデン濃度１５ｗｔ％、クロム酸塩濃度５ｗｔ％の塗料を作成し、この塗料をスプレー塗装法で数回乾燥させながら重ね塗りし、塗装後に１８０℃で６０分間焼成して膜厚が化成処理被膜と合わせて約１０μｍの潤滑被膜を形成した。   The lubricating coating is composed of a binder obtained by dispersing molybdenum disulfide as a solid lubricant and chromate as a rust inhibitor in a solution obtained by dissolving a binder epoxy resin and a curing agent in methyl ethyl ketone. A paint having a molybdenum sulfide concentration of 15 wt% and a chromate concentration of 5 wt% is prepared, and this paint is applied repeatedly while being dried several times by a spray coating method. And a lubricating film of about 10 μm was formed.

次に、こうして得たテスト用の潤滑被膜付摺動部品に前述の３種類の防錆油（ダイラストＤ−３５Ｋ、コスモピュアセイフティー１０、及びＮｏｘ−Ｒｕｓｔ）をそれぞれ５分間の油漬を実施してしみ込ませた。Ｎｏｘ−Ｒｕｓｔは、水で５％の濃度になるように希釈して用いた。また、比較のために、防錆油をしみ込ませていないテスト用潤滑被膜付摺動部品も準備した。そして各テスト用潤滑被膜付摺動部品を５０時間の塩水噴霧試験（試験方法は、ＪＩＳ Ｚ２３７１による）に供し、錆の発生状況と摺動抵抗の増加状況を調べた。 Then, thus obtained three types of rust-preventive oil described above the lubricating sliding parts with coatings for testing (da Illustration D-35K, Cosmo Pure Safety 10, and Nox-Rust) a Abura漬of between 5 minutes each Implemented and sunk. Nox-Rust was used after diluting with water to a concentration of 5%. For comparison, a sliding part with a lubricating film for test that was not impregnated with rust preventive oil was also prepared. Each sliding part with a lubricating coating for testing was subjected to a salt spray test for 50 hours (the test method was in accordance with JIS Z2371), and the state of occurrence of rust and the state of increase in sliding resistance were examined.

その結果、防錆油をしみ込ませていない摺動部品は、サンプル１０個の全てに錆が発生したが、防錆油をしみ込ませたものは、いずれも錆の発生率が非常に低かった。   As a result, the sliding parts not soaked with rust preventive oil rusted on all 10 samples, but all the samples soaked with rust preventive oil had a very low rust generation rate.

また、防錆油をしみ込ませていない摺動部品は、塩水噴霧試験後の摺動抵抗増加が非常に大きかったが、防錆油をしみ込ませたものはその摺動抵抗の増加がいずれも小さかった。なお、この試験において摺動部品に油がしみ込んだことは、油漬け前後の部品の重量差で判断した。   In addition, sliding parts not soaked with rust-preventing oil had a very large increase in sliding resistance after the salt spray test, but those that were impregnated with anti-rust oil had a small increase in sliding resistance. It was. In this test, it was judged from the weight difference between the parts before and after the oil immersion that the sliding parts were soaked with oil.

摺動抵抗の増加状況を調べた結果を表１に示す。この表１の比較品は、油漬けをしていないもの、発明品１はダイラストＤ−３５Ｋに５分間漬けたもの、発明品２はコスモピュアセイフティー１０に５分間漬けたもの、発明品３はＮｏｘ−Ｒｕｓｔの希釈液に５分間漬けたものである。また、摺動抵抗Ｉは、塩水噴霧前の抵抗値を、摺動抵抗IIは、油漬け後すぐに５０時間の塩水噴霧を実施した後の抵抗値を、摺動抵抗IIIは、油漬け後３ヶ月経過後に５０時間の塩水噴霧を実施した後の抵抗値をそれぞれ示している。摺動部品は同一ロットの中から各３個のサンプルを抽出して試験に供し、摺動抵抗の増加量は平均値で表した。   Table 1 shows the results of examining the increase in sliding resistance. The comparative products in Table 1 were not soaked in oil, the invention product 1 was soaked in Dillus D-35K for 5 minutes, the invention product 2 was soaked in Cosmo Pure Safety 10 for 5 minutes, the invention product 3 is immersed in a diluted Nox-Rust solution for 5 minutes. Sliding resistance I is the resistance value before salt spraying, sliding resistance II is the resistance value after 50 hours of salt water spraying immediately after oil soaking, and sliding resistance III is after oil soaking. The resistance values after 50 hours of salt water spraying after 3 months are shown. For the sliding parts, three samples were extracted from the same lot for use in the test, and the amount of increase in sliding resistance was expressed as an average value.

Figure 2006037997
Figure 2006037997

潤滑被膜形成後の摺動部品に油をしみ込ませることの有効性がこの試験結果によく現れている。   The effectiveness of impregnating oil into the sliding parts after the formation of the lubricating coating appears well in this test result.

この発明を適用したシートベルト用ラッチの斜視図The perspective view of the seatbelt latch to which this invention is applied 図１のラッチの表層部を模式化して示す拡大断面図FIG. 1 is an enlarged sectional view schematically showing a surface layer portion of the latch of FIG.

符号の説明Explanation of symbols

１ シートベルト用ラッチ
２ 化成処理被膜
３ 潤滑被膜
４ 空隙 1 Latch for seat belt 2 Chemical conversion coating 3 Lubrication coating 4 Air gap

Claims (4)

鉄合金で形成された部品の表面に化成処理被膜と潤滑被膜を順に積層して設け、前記潤滑被膜は、固体潤滑剤と防錆剤とバインダとを含有する、油に対して化学的に安定した材料で形成され、外部に通じる微細な空隙が形成されており、
この潤滑被膜を形成した後、部品を油漬処理することを特徴とする摺動部品の製造方法。 A chemical conversion coating and a lubricating coating are sequentially laminated on the surface of a part formed of an iron alloy. The lubricating coating contains a solid lubricant, a rust inhibitor, and a binder, and is chemically stable to oil. Is formed with the material, and a fine void leading to the outside is formed,
A method of manufacturing a sliding component, wherein the lubricating coating is formed and then the component is dipped in oil. 前記部品は鉄系焼結合金で形成され、この部品を焼結後に封孔処理し、しかる後、この部品の表面に前記化成処理被膜と潤滑被膜を形成し、かつ前記油漬処理を実施する請求項１に記載の摺動部品の製造方法。   The component is formed of an iron-based sintered alloy, sealed after the component is sintered, and then formed with the chemical conversion treatment film and the lubricating coating on the surface of the component, and the oil immersion treatment is performed. Item 2. A method for manufacturing a sliding component according to Item 1. 前記潤滑被膜の空隙を０．０５μｍ〜１０μｍとし、その空隙に油をしみ込ませることを特徴とする請求項１又は２に記載の摺動部品の製造方法。   The method for manufacturing a sliding part according to claim 1, wherein the gap of the lubricating coating is 0.05 μm to 10 μm, and oil is soaked into the gap. 表面に化成処理被膜とその化成処理被膜上に形成された潤滑被膜とを有し、前記潤滑被膜は固体潤滑剤と防錆剤とバインダとを含有する、油に対して化学的に安定した材料で形成され、外部に通じる微細な空隙ができており、この潤滑被膜の前記空隙に油がしみ込んでいる請求項１乃至３のいずれかに記載の方法で製造された摺動部品。   A material having a chemical conversion treatment film and a lubricating film formed on the chemical conversion treatment film on the surface, the lubricant film containing a solid lubricant, a rust preventive agent and a binder and chemically stable to oil. The sliding part manufactured by the method according to any one of claims 1 to 3, wherein a fine void is formed which leads to the outside, and oil penetrates into the void of the lubricating coating.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011218254A (en) * 2010-04-05 2011-11-04 Takata Corp Method for coating tongue, tongue, and seat belt device
JP2011225146A (en) * 2010-04-21 2011-11-10 Schunk Kohlenstofftechnik Gmbh Lubricating device of chain drive and lubricating method of chain drive
JP2013213577A (en) * 2012-03-09 2013-10-17 Nsk Ltd Sliding member, needle roller bearing and metal surface treatment method
US8573362B2 (en) 2010-04-09 2013-11-05 Schunk Kohlenstofftechnik Gmbh Device and method for the lubrication of a chain drive

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011218254A (en) * 2010-04-05 2011-11-04 Takata Corp Method for coating tongue, tongue, and seat belt device
US8573362B2 (en) 2010-04-09 2013-11-05 Schunk Kohlenstofftechnik Gmbh Device and method for the lubrication of a chain drive
JP2011225146A (en) * 2010-04-21 2011-11-10 Schunk Kohlenstofftechnik Gmbh Lubricating device of chain drive and lubricating method of chain drive
JP2013213577A (en) * 2012-03-09 2013-10-17 Nsk Ltd Sliding member, needle roller bearing and metal surface treatment method

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