JP3642077B2 - Swash plate compressor swash plate - Google Patents
Swash plate compressor swash plate Download PDFInfo
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- JP3642077B2 JP3642077B2 JP1143795A JP1143795A JP3642077B2 JP 3642077 B2 JP3642077 B2 JP 3642077B2 JP 1143795 A JP1143795 A JP 1143795A JP 1143795 A JP1143795 A JP 1143795A JP 3642077 B2 JP3642077 B2 JP 3642077B2
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- Prior art keywords
- swash plate
- layer
- compressor
- aluminum
- iron
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Classifications
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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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/12—Coating
Description
【０００１】
【産業上の利用分野】
本発明は、斜板式コンプレッサーの斜板に関するものであり、さらに詳しく述べるならば、斜板式コンプレッサーにおいて鉄系もしくはアルミニウム系材料からなる斜板の摺動特性を飛躍的に改良する表面処理技術に関するものである。
【０００２】
【従来の技術】
斜板式コンプレッサーは、回転軸に斜めに固着された斜板又は回転軸に斜めに取り付けられ、傾斜角変更可能な斜板が、回転軸の回転に応じてコンプレッサー内にて仕切られた空間の体積を増減することにより圧縮・膨張を行うものである。かかる斜板はシューと称される密封部材と摺動しかつ相互に気密な封止を図ることにより冷却媒体を所定の空間にて圧縮・膨張させるものである。
斜板の摺動条件が特長的な点は、低温下でコンプレッサーを運転初期に潤滑油が到達する前に冷媒が摺動部に充満し、これが摺動部に残存する潤滑油を洗浄する作用をもつために、潤滑油がないドライ条件で摺動されることである。このように斜板は摺動条件が非常に厳しく、トラブルも起こり易いため斜板式コンプレッサーにおける最重要部品である。
【０００３】
このような条件で使用される斜板は耐焼付性、耐摩耗性などの摺動特性が必要となるので、アルミニウム系材料に硬質物を添加して耐摩耗性を向上する提案、斜板の材質を改良する提案、鉄系斜板に熱処理を施し硬度を上昇させ耐摩耗性を向上させる提案や、表面処理方法の提案などがなされている。
【０００４】
本出願人は、鉄系斜板と鉄系シューの摺動では焼付が起り易いので、特開昭５１−３６６１１号公報において鉄系斜板ではシューにＣｕ焼結材料を接着することを提案した。すなわち、鉄系斜板に硬化処理を施して来たが相手材であるシューも鉄系材料であると、同種材料の摺動により焼付が発生し易いという問題があった。これを避けるために鉄系斜板の相手材（シュー）に焼結銅合金を使用したのである。
【０００５】
また、同種材料の摺動を避けるために鉄系斜板にすずめっきを施し、耐焼付性を向上させることも提案された。すずめっきを施した鉄系斜板の耐焼付性は十分なものではなかった。この原因は下地の鉄鋼自体では摺動特性が不充分であり、またすずはなじみ性には優れているが耐摩耗性が不充分であると考えられる。
【０００７】
本出願人は、溶射合金が、溶製合金もしくは焼結合金と比較して(a)組織が微細であること、(b)同一組成では硬さが高いために強度を耐摩耗性が良好であること、(c)溶射条件を調節することにより完全溶解組織から一部アトマイズ粉の形状・組織が残った組織まで調整でき、これにより摺動特性を使用条件に合わせて変えることができること、などの特性をもっており、これらの特性を利用すると優れた耐焼付性及び耐摩耗性が得られることを見出し、溶射銅合金からなる被覆層に基材を形成した斜板式コンプレッサー用斜板の出願をした（特願平６−７１６５２号）。
【０００８】
【発明が解決しようとする課題】
さらに、本出願人は荷重が５００ｋｇ／ｃｍ2 以上となる過酷なコンプレッサー運転条件で溶射斜板の性能につき試験したところ、摩擦により局部的に焼付きを起こし、シューの移動方向とほぼ直交する割れが溶射層に発生することがわかった。したがって本発明は溶射斜板の耐焼付性を高めることを目的とするものである。
【０００９】
【課題を解決するための手段】
上記問題点を解決できる方法につき鋭意検討し実験を行った結果、本発明者らは、冷媒を圧縮する斜板式コンプレッサーであって、荷重 500kg/cm 2 以上で、かつ運転初期において潤滑油がないドライ条件で運転される斜板式コンプレッサーに用いられる斜板において、鉄系もしくはアルミニウム系材料からなる基板に銅系もしくはアルミニウム系材料を溶射し、該溶射層に、厚さが0.1〜50μｍの鉛系めっき、すず系めっき、鉛−すず系めっき、ポリテトラフルオロエチレン系被覆、MoS2被覆又はMoS2・黒鉛混合被覆（以下、これらを「被覆層」と総称する）を施すことが耐焼付性向上のために有効であることを見出した。
【００１０】
以下、本発明の構成を説明する。
溶射合金は、なじみ性、低摩擦特性及び耐焼付性に優れている銅、アルミニウムもしくこれらの合金を使用することが必要である。銅合金及びアルミニウム合金としては軸受もしくは摺動合金として公知の組成のものを使用できるのは当然であるが、被覆層がなじみ性、低摩擦性などを呈するので、公知の軸受や摺動合金以外のものも使用することができる。
本発明において溶射法は溶射粉末全体を溶解させ凝固により層を形成する方法や、溶射粉末の一部は溶解させないで元の粉末組織を崩さない方法などを採用することができる。
【００１１】
溶射銅系合金は、すずを強化元素として好ましくは２〜１５％（本発明において組成の百分率は重量％である）添加したＣｕ−Ｓｎ系合金が好ましい。さらに、強化元素や、なじみ性や低摩擦特性付与に寄与する鉛を好ましくは２〜３０％添加することも可能である。
その他の元素又は成分として０．１％以下のリン、５％以下のＡｇ、１０％以下のＦｅ3 Ｐ、Ｆｅ2 Ｂの１種又は２種以上を添加することも可能である。
【００１２】
溶射アルミニウム合金は初晶シリコンを晶出させるためのＳｉを好ましくは８〜２０％添加したＡｌ−Ｓｉ系合金、主として固溶強化をもたらすＣｕを好ましくは０．５〜５％添加したＡｌ−Ｃｕ系合金などを好ましく使用することができる。その他の元素としてＭｎ、Ｍｇ、Ｚｎ、Ｎｉのうちいずれかの１種又は２種以上元素を１０％以下添加することも可能である。アルミニウム系材料の溶射は銅系材料の溶射より低温で実施することができるので、溶射層の熱歪みを少なくなる利点がある。
銅及びアルミニウム系合金溶射層の厚みは５〜３００μｍの範囲内にあることが好ましい。より好ましい厚みは２０〜２００μｍの範囲内である。
【００１３】
鉛系、すず系もしくは鉛−すず系めっき層は通常電気めっきにより溶射層上に形成される。電気めっきは酸性浴及びアルカリ性浴の何れでもよいが、アルカリ性浴が腐食性が少ない面で好ましい。めっき金属は上記の性質が損なわれない限り合金化を妨げるものではないが、高硬度化をもたらす合金化は鉛、すずの性質上好ましくなく、銅の場合は５％以上２０％以下にするべきである。
【００１５】
めっき層は、その性能と溶射層の性能を共に十分に発揮するために、厚みが０．１〜３０μｍの範囲内にあることが好ましい。より好ましいめっき層の厚みは０．５〜１０μｍの範囲内である。
溶射層にめっきを施すための前処理条件やめっき条件は一般の溶製材を母材とする場合と異ならない。
【００１７】
さらに、めっき層に変えて摩擦係数を低下させるＭｏＳ2 、ＭｏＳ2 ・黒鉛混合物もしくはＰＴＦＥ（ポリテトラフルオロエチレン）の被覆を形成することができる。被覆層の厚みは１〜５０μｍの範囲内にあることが好ましく、より好ましくは１〜１０μｍの範囲内である。ＭｏＳ2 、黒鉛、ＰＴＥＥなどは水又は樹脂バインダーなどに分散させて溶射層上に塗布した後適当な温度で焼き付けることにより所定の厚みをもつ層として被覆することができる。ＭｏＳ2 ・黒鉛混合被覆中の黒鉛比率は５０％以下が望ましい。
【００１８】
斜板に対して摺動するシュー自体は公知のものであり、例えば本出願人の特開昭５１−３６６１１号公報などに示されており、鉄系材料としては鉄を主成分とするすべての材料で摺動面を構成したものを使用することができるが、軸受鋼が好ましい。また、その製造方法も一切限定されず、圧延、鍛造、粉末冶金、表面硬化などの技術を適宜採用することができる。
【００１９】
【作用】
溶射金属は硬化しており外部応力に追随して変形し難く、また鉛などの添加金属により形成される軟質相は応力が集中して割れを起こし易い層状になるために、溶射層はシューと上記した高荷重かつドライ潤滑条件という過酷な条件で摺動する際に局部的焼付が起こり、割れが起こると考えられる。これに対して、めっき層やMoS2,黒鉛、PTFEなどの被覆層を溶射金属に設けると、これが摺動面での摩擦係数を低下させる結果溶射層内の内部応力が低下し、また被覆層は大きく塑性変形することにより溶射層に及ぼされる変形を少なくするので、割れが起こりにくくなる。
以下、実施例により本発明をさらに詳しく説明する。
【００２０】
【実施例】
表１に示す銅合金を鉄基材に溶射ガン（第１メテコ社製ダイアモンドジェット型ガン）を使用し、下記条件で行った。
ガス種：プロピレン１０容量部と酸素・空気９０容量部の混合ガス
ガス圧：７ｋｇｆ／ｃｍ2
フレーム速度：１２００ｍ／ｓｅｃ
溶射距離：１８０ｍｍ
粉末供給量：５０ｇ／ｍｉｎ
溶射層の厚みは約１５０μｍであった。
【００２１】
同じく表１に示すアルミニウム合金を上記の溶射ガンを使用し、上記条件で溶射した。溶射層の厚みは約１５０μｍであった。
【００２２】
溶射層を洗浄、脱脂し、アルミニウム合金溶射層については軽く酸洗した後，表１に示す軟質被覆層形成のための表面処理を行った。めっきはすべてアルカリ性ほうふっ化浴を用い、温度２５℃、電流密度は３Ａ／ｄｍ2 で行い、めっき厚みを１〜３μｍとした。
【００２３】
ＭｏＳ2 、黒鉛は粒度が０．５〜２０μｍのものを有機バインダーに分散した後基材に塗布し、その後２００℃で焼き付けを行い厚みが１０μｍの被覆層を形成した。また、ＰＴＦＥは粒度が０．１〜２０μｍのものを水に分散した後基材に塗布し、その後２００℃で焼き付けを行い厚みが１０μｍの被覆層を形成した。このようにして形成した試験材の性能を以下の方法で試験した。
【００２４】
焼付試験方法
試験機：ピンディスク型試験機
相手材：焼入れ軸受鋼（ＳＵＪ２）
潤滑方法：初期塗布のみ
荷重負荷方法：５０ｋｇ一定
なお、この試験条件は溶射層に焼付きが発生し、焼付きと並行して割れが起こる条件として設定した。また、摩擦係数はピンディスク型試験機により測定した。
【００２５】
表１において、Ｎｏ．１１〜１３は溶射層に表面処理をしない比較例であり、Ｎｏ．１４は溶射層を設けないで単に表面処理（Ｓｎめっき）を施した比較例である。これらの比較例に比べ本発明実施例の焼付時間は著しく長くなっている。
【００２７】
【発明の効果】
本発明は以上説明したように、斜板式コンプレッサーの斜板において銅もしくはアルミニウム系材料の溶射層とその被覆層を組み合わせることにより、溶射層の耐焼付き性を向上させ、溶射層の割れを防止することができる。したがって、斜板式コンプレッサーが過酷な条件で運転された場合にもコンプレッサーの性能低下が招かれないので、本発明は自動車、家屋室内エアコンなどの品質向上に寄与するところが大である。[0001]
[Industrial application fields]
The present invention relates to a swash plate for a swash plate compressor, and more particularly, to a surface treatment technique for dramatically improving the sliding characteristics of a swash plate made of an iron or aluminum material in a swash plate compressor. It is.
[0002]
[Prior art]
A swash plate compressor is a volume of space in which a swash plate that is obliquely fixed to a rotating shaft or attached obliquely to a rotating shaft and a swash plate that can change the tilt angle is partitioned in the compressor according to the rotation of the rotating shaft. The compression / expansion is performed by increasing / decreasing. Such a swash plate slides with a sealing member called a shoe and seals the cooling medium in a predetermined space by sealing each other in an airtight manner.
The feature of the sliding condition of the swash plate is that the refrigerant fills the sliding part before the lubricating oil reaches the initial stage of operation of the compressor at a low temperature, which cleans the lubricating oil remaining on the sliding part. Therefore, it is slid under dry conditions without lubricating oil. As described above, the swash plate is the most important component in the swash plate type compressor because the sliding condition is very severe and troubles easily occur.
[0003]
Since the swash plate used under such conditions requires sliding characteristics such as seizure resistance and wear resistance, a proposal to improve wear resistance by adding a hard material to an aluminum material, Proposals have been made to improve the material, heat treatment of the iron-based swash plate to increase hardness and improve wear resistance, surface treatment methods, and the like.
[0004]
The applicant of the present invention has proposed that the iron-based swash plate adheres a Cu sintered material to the shoe in the iron-based swash plate because seizure easily occurs when the iron-based swash plate and the iron-based shoe slide. . That is, the iron swash plate has been hardened, but if the shoe as the counterpart material is also an iron material, there is a problem that seizure is likely to occur due to sliding of the same kind of material. In order to avoid this, a sintered copper alloy was used for the counterpart material (shoe) of the iron-based swash plate.
[0005]
It has also been proposed to improve the seizure resistance by applying tin plating to the iron-based swash plate to avoid sliding of the same kind of material. The seizure resistance of tin-plated iron-based swash plates was not sufficient. The cause of this is considered to be that the underlying steel itself has insufficient sliding characteristics, and tin has excellent conformability but insufficient wear resistance.
[0007]
The present applicant has found that (a) the structure is finer compared to the molten alloy or sintered alloy, and (b) the strength is high in wear resistance because the hardness is high in the same composition. (C) By adjusting the spraying conditions, it is possible to adjust from completely melted structure to the structure in which some atomized powder shape / structure remains, thereby changing the sliding characteristics according to the use conditions, etc. And found that excellent seizure resistance and wear resistance can be obtained by using these characteristics, and filed an application for a swash plate for a swash plate compressor in which a base material is formed on a coating layer made of a sprayed copper alloy. (Japanese Patent Application No. 6-71652 ).
[0008]
[Problems to be solved by the invention]
Further, the applicant has tested the performance of the sprayed swash plate under severe compressor operating conditions with a load of 500 kg / cm 2 or more. As a result, local seizure occurs due to friction, and the crack is almost perpendicular to the moving direction of the shoe. Was found to occur in the sprayed layer. Accordingly, an object of the present invention is to improve the seizure resistance of the sprayed swash plate.
[0009]
[Means for Solving the Problems]
As a result of earnestly examining and experimenting on a method that can solve the above problems, the inventors of the present invention are swash plate compressors that compress refrigerant, with a load of 500 kg / cm 2 or more and no lubricating oil in the initial operation. In a swash plate used in a swash plate compressor operated under dry conditions, copper or aluminum material is sprayed onto a substrate made of iron or aluminum material, and the lead layer having a thickness of 0.1 to 50 μm is applied to the sprayed layer. Applying plating, tin-based plating, lead-tin-based plating, polytetrafluoroethylene-based coating, MoS 2 coating or MoS 2 / graphite mixed coating (hereinafter collectively referred to as “coating layer”) improves seizure resistance Found to be effective for.
[0010]
The configuration of the present invention will be described below.
As the thermal spray alloy, it is necessary to use copper, aluminum, or these alloys, which are excellent in conformability, low friction characteristics and seizure resistance. As a copper alloy and an aluminum alloy, it is natural that bearings or sliding alloys having a known composition can be used. However, since the coating layer exhibits conformability, low friction, etc., other than known bearings and sliding alloys. Can also be used.
In the present invention, as the thermal spraying method, a method in which the entire thermal spray powder is dissolved and a layer is formed by solidification, or a method in which a part of the thermal spray powder is not dissolved and the original powder structure is not destroyed can be adopted.
[0011]
The thermally sprayed copper-based alloy is preferably a Cu—Sn-based alloy to which tin is added as a strengthening element, preferably 2 to 15% (in the present invention, the percentage of the composition is wt%). Furthermore, it is also possible to add preferably 2 to 30% of a reinforcing element and lead that contributes to impartability and low friction characteristics.
As other elements or components, one or more of 0.1% or less of phosphorus, 5% or less of Ag, 10% or less of Fe 3 P, and Fe 2 B can be added.
[0012]
The sprayed aluminum alloy is preferably an Al-Si alloy to which Si for crystallization of primary crystal silicon is preferably added in an amount of 8 to 20%. A system alloy or the like can be preferably used. As other elements, one or more elements of Mn, Mg, Zn, and Ni can be added by 10% or less. Since the spraying of the aluminum-based material can be performed at a lower temperature than the spraying of the copper-based material, there is an advantage that the thermal distortion of the sprayed layer is reduced.
The thickness of the copper and aluminum-based alloy sprayed layer is preferably in the range of 5 to 300 μm. A more preferable thickness is in the range of 20 to 200 μm.
[0013]
The lead-based, tin-based or lead-tin-based plating layer is usually formed on the sprayed layer by electroplating. Electroplating may be either an acidic bath or an alkaline bath, but an alkaline bath is preferred in terms of low corrosivity. Plating metal does not prevent alloying as long as the above properties are not impaired, but alloying that leads to high hardness is not preferable in terms of the properties of lead and tin, and in the case of copper, it should be 5% or more and 20% or less. is there.
[0015]
The plating layer preferably has a thickness in the range of 0.1 to 30 μm in order to sufficiently exhibit both the performance of the plating layer and the performance of the sprayed layer. A more preferable thickness of the plating layer is in the range of 0.5 to 10 μm.
The pretreatment conditions and plating conditions for plating the sprayed layer are not different from the case where a general molten material is used as a base material.
[0017]
Furthermore, it is possible to form a coating of MoS 2 , MoS 2 · graphite mixture or PTFE (polytetrafluoroethylene) which reduces the friction coefficient by changing to a plating layer. The thickness of the coating layer is preferably in the range of 1 to 50 μm, more preferably in the range of 1 to 10 μm. MoS 2 , graphite, PTEE, etc. can be coated as a layer having a predetermined thickness by dispersing it in water or a resin binder and applying it onto the sprayed layer, followed by baking at an appropriate temperature. The graphite ratio in the MoS 2 / graphite mixed coating is desirably 50% or less.
[0018]
The shoe itself that slides on the swash plate is known, and is shown in, for example, Japanese Patent Application Laid-Open No. 51-36611 of the present applicant. A material having a sliding surface made of a material can be used, but bearing steel is preferable. Moreover, the manufacturing method is not limited at all, and techniques such as rolling, forging, powder metallurgy, and surface hardening can be appropriately employed.
[0019]
[Action]
Since the sprayed metal is hardened and hardly deforms following external stress, and the soft phase formed by the additive metal such as lead becomes a layer that is prone to cracking due to stress concentration, the sprayed layer is It is considered that local seizure occurs and cracks occur when sliding under the severe conditions such as the high load and dry lubrication conditions described above . On the other hand, if a coating layer such as a plating layer or MoS 2 , graphite, PTFE, etc. is provided on the sprayed metal, this reduces the coefficient of friction on the sliding surface, resulting in a decrease in internal stress in the sprayed layer. Since the plastic deformation greatly reduces the deformation exerted on the sprayed layer, cracks are less likely to occur.
Hereinafter, the present invention will be described in more detail with reference to examples.
[0020]
【Example】
The copper alloy shown in Table 1 was subjected to the following conditions using a thermal spray gun (diamond jet type gun manufactured by 1 Metco Co., Ltd.) on an iron base.
Gas type: mixed gas of 10 parts by volume of propylene and 90 parts by volume of oxygen / air Gas pressure: 7 kgf / cm 2
Frame speed: 1200m / sec
Thermal spray distance: 180mm
Powder supply amount: 50 g / min
The thickness of the sprayed layer was about 150 μm.
[0021]
Similarly, the aluminum alloy shown in Table 1 was sprayed using the above spray gun under the above conditions. The thickness of the sprayed layer was about 150 μm.
[0022]
The sprayed layer was washed and degreased, and the aluminum alloy sprayed layer was lightly pickled and then subjected to surface treatment for forming a soft coating layer shown in Table 1. All the plating was performed using an alkaline fluorination bath, the temperature was 25 ° C., the current density was 3 A / dm 2 , and the plating thickness was 1 to 3 μm.
[0023]
MoS 2 and graphite having a particle size of 0.5 to 20 μm were dispersed in an organic binder and then applied to a substrate, followed by baking at 200 ° C. to form a coating layer having a thickness of 10 μm. Further, PTFE having a particle size of 0.1 to 20 μm was dispersed in water and then applied to a substrate, and then baked at 200 ° C. to form a coating layer having a thickness of 10 μm. The performance of the test material thus formed was tested by the following method.
[0024]
Seizure test method tester: Pin disk type tester Counterpart material: Quenched bearing steel (SUJ2)
Lubrication method: Initial application only Load method: 50 kg constant Note that this test condition was set as a condition in which seizure occurred in the sprayed layer and cracking occurred in parallel with seizure. The coefficient of friction was measured with a pin disk type testing machine.
[0025]
In Table 1, no. Nos. 11 to 13 are comparative examples in which no surface treatment is applied to the sprayed layer. No. 14 is a comparative example in which the surface treatment (Sn plating) is simply performed without providing the sprayed layer. Compared with these comparative examples, the baking time of the examples of the present invention is remarkably longer.
[0027]
【The invention's effect】
As described above, the present invention improves the seizure resistance of the thermal spray layer and prevents cracking of the thermal spray layer by combining the thermal spray layer of the copper or aluminum material and the coating layer in the swash plate of the swash plate compressor. be able to. Accordingly, even when the swash plate compressor is operated under severe conditions, the performance of the compressor is not deteriorated. Therefore, the present invention greatly contributes to improving the quality of automobiles, house air conditioners and the like.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1143795A JP3642077B2 (en) | 1995-01-27 | 1995-01-27 | Swash plate compressor swash plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1143795A JP3642077B2 (en) | 1995-01-27 | 1995-01-27 | Swash plate compressor swash plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08199327A JPH08199327A (en) | 1996-08-06 |
| JP3642077B2 true JP3642077B2 (en) | 2005-04-27 |
Family
ID=11778077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1143795A Expired - Lifetime JP3642077B2 (en) | 1995-01-27 | 1995-01-27 | Swash plate compressor swash plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3642077B2 (en) |
Cited By (1)
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1995
- 1995-01-27 JP JP1143795A patent/JP3642077B2/en not_active Expired - Lifetime
Cited By (1)
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| KR100848390B1 (en) * | 2006-03-15 | 2008-07-25 | 주식회사 베스트메탈워크 | Method for manufacturing multi-layer material for metal bearing by spray forming |
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| JPH08199327A (en) | 1996-08-06 |
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