JPH059661A - Material for vane and vane - Google Patents
Material for vane and vaneInfo
- Publication number
- JPH059661A JPH059661A JP16660591A JP16660591A JPH059661A JP H059661 A JPH059661 A JP H059661A JP 16660591 A JP16660591 A JP 16660591A JP 16660591 A JP16660591 A JP 16660591A JP H059661 A JPH059661 A JP H059661A
- Authority
- JP
- Japan
- Prior art keywords
- vane
- wear
- less
- particles
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ロータリーコンプレッ
サ、ベーンポンプ等の圧縮機に用いられるベーンに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vane used in a compressor such as a rotary compressor and a vane pump.
【0002】[0002]
【従来の技術】ベーンを用いた圧縮機の一例を図1に示
すように、ベーン1はスプリング4により常時ロータ2
に押し付けられており、ロータ2の偏心回転によって、
ロータ2とシリンダ3によって形成される空間の容積変
化により気体を圧縮する。従来、冷媒となる気体はフロ
ンガスが用いられている。ベーンの先端は常にロータ
と、またベーンの側面はシリンダと接して摺動している
ため、ベーンに要求される特性は、ベーン自身が摩耗し
ないのと同時に相手のロータやシリンダも摩耗させない
ことである。従来より、このベーンにはSKH51種相
当の溶製高速度鋼が一般に用いられており、一部はこれ
に酸窒化などの表面処理が施されている。また、ベーン
の材質や組成を改良し、耐摩耗性を向上させたり、自己
潤滑性をよくしたりする目的で特開昭56−47550
号、特開昭59−20446号、特開昭61−4855
6号、特開昭64−35091号、特開平2−1023
92号に記載されるものが提案されている。2. Description of the Related Art As shown in FIG. 1, an example of a compressor using a vane, a vane 1 is always provided with a rotor 2 by means of a spring 4.
Is pressed against the eccentric rotation of the rotor 2,
The gas is compressed by the volume change of the space formed by the rotor 2 and the cylinder 3. Conventionally, Freon gas has been used as the refrigerant gas. Since the tip of the vane always slides in contact with the rotor and the side surface of the vane slides in contact with the cylinder, the characteristic required for the vane is that the vane itself does not wear, and at the same time the mating rotor and cylinder do not wear. is there. Conventionally, molten high speed steel corresponding to SKH51 type has been generally used for this vane, and a part of this has been subjected to surface treatment such as oxynitriding. Further, for the purpose of improving the material and composition of the vane, improving wear resistance and improving self-lubricating property, JP-A-56-47550.
JP-A-59-20446, JP-A-61-4855
6, JP-A 64-35091, JP-A-2-1023.
The one described in No. 92 has been proposed.
【0003】[0003]
【発明が解決しようとする課題】前記の圧縮機に使用さ
れている冷媒は、クロロフルオロカーボン(以下CFC
と記す)系のフロンであるが、このCFCは成層圏にま
で拡散した後、紫外線に当って分解し、塩素を放出する
のでオゾン層が破壊される。このために、CFCは、西
暦2000年までに全廃する計画で、これに代替する冷媒剤
の開発が進められている。代替冷媒としては塩素を含ま
ないハイドロフルオロカーボン(以下HFCと記す)系
のフロンが最も有望であり、この種のフロンは環境への
害が少ない。ところが、HFC系のフロンを使用するベ
ーンポンプやロータリーコンプレッサは、従来のCFC
系のフロンを使用するものと比較して以下の問題があ
る。
冷媒の潤滑性が劣る。
圧縮比を高くする必要があり、ベーンに加わる負荷が
高くなる。
冷媒の吸湿性が大きい。
潤滑油の潤滑性が劣る。
潤滑油の吸湿性が大きくなる。The refrigerant used in the above compressor is a chlorofluorocarbon (hereinafter referred to as CFC).
The CFC diffuses into the stratosphere, then decomposes by being exposed to ultraviolet rays and releases chlorine, thereby destroying the ozone layer. For this reason, CFC is planned to be completely abolished by the year 2000, and development of a refrigerant agent to replace it is in progress. As an alternative refrigerant, hydrofluorocarbon (hereinafter referred to as HFC) -based CFC containing no chlorine is the most promising, and this type of CFC has little environmental damage. However, vane pumps and rotary compressors that use HFC-based CFCs are
There are the following problems as compared with those using the Freon of the system. The lubricity of the refrigerant is poor. It is necessary to increase the compression ratio, which increases the load on the vane. The hygroscopicity of the refrigerant is high. The lubricity of lubricating oil is inferior. The hygroscopicity of the lubricating oil increases.
【0004】上記の原因によって、従来のベーンではロ
ータとの摺動摩耗が極端に加速され、はなはだしい場合
は、ロータとのカジリを起すことがあり、実用的な圧縮
機としての寿命が得られないことが明らかとなってき
た。本発明の目的は、主にHFC系フロンを冷媒とする
圧縮機に用いられる新規なベーン用材料およびベーンを
提供することである。Due to the above-mentioned causes, sliding wear with the rotor is extremely accelerated in the conventional vane, and in the worst case, it may cause galling with the rotor, so that the practical life of the compressor cannot be obtained. It became clear. An object of the present invention is to provide a novel vane material and a vane used mainly in a compressor using HFC-based CFC as a refrigerant.
【0005】[0005]
【課題を解決するための手段】本発明は、新しいHFC
系のフロンを使用する場合に、前述のないしの問題
から、特にロータとの摺動摩耗を減少させることに着目
して成されたものであり、その材料の特徴は、微細な炭
化物が均一に分散された特定組成を有する基地に、さら
に窒化物粒子、炭窒化物粒子の1種または2種以上を2
〜20%分散されたことにある。すなわち、本発明のうち
第1発明は、重量%でC 1.0〜3.5%、Si 1.5%以下、Mn
1.0%以下、Cr 3〜6%と、W 20%以下、Mo 10%以下の
1種または2種がW+2Moで23%以下、V,Nbの1種ま
たは2種を12%以下、Co 20%以下を含み、残部Feおよ
び不可避的不純物からなる基地に、窒化物粒子、炭窒化
物粒子の1種または2種以上をベーン重量に対して合計
で2〜20%分散させたことを特徴とするベーン用材料であ
り、第2発明は窒化物、炭窒化物がTi,Zr,V,Nb,Hf
の化合物粒子である第1発明に記載のベーン用材料であ
る。また、第3発明は第1発明に記載の組成からなる基
地に、窒化物粒子、炭窒化物粒子の1種または2種以上
をベーン重量に対して合計で2〜20%分散させたことを特
徴とするベーンである。本発明でいう基地とは、別途添
加する窒化物粒子、炭窒化物粒子以外のすべてを指し、
この基地は基地を構成する鋼組成からなる粉末を製造す
ることにより達成される。本発明のベーンは、この基地
組成を有する粉末に、ベーン重量全体の割合で2〜20%の
窒化物粒子、炭窒化物粒子の1種または2種以上を分散
させて成形し、焼結を行なうことにより製造される。ま
た、上記発明のベーン材料およびベーンは、ベーンの母
材に係わるものであり、このままでも使用できるが、実
際に圧縮機に組入られるベーン本体には、必要に応じて
硼化処理、酸窒化処理の他、CVDやPVDによるTi
C,TiNなどの硬質皮膜処理等の表面処理を施して使
用することもできる。このような表面処理はベーンとロ
ータ間の摩擦係数を下げ、相手材とのカジリを減少させ
るとともに母材を腐食環境から保護する効果もある。The present invention provides a new HFC
In the case of using the Freon of the system, it was made paying attention to reducing the sliding wear with the rotor in view of the above-mentioned problems, and the characteristic of the material is that the fine carbide is evenly distributed. Two or more kinds of nitride particles and carbonitride particles are further added to the dispersed base having a specific composition.
~ 20% dispersion. That is, the first invention of the present invention is that C 1.0 to 3.5% by weight, Si 1.5% or less, Mn
1.0% or less, Cr 3 to 6%, W 20% or less, Mo 10% or less 1 type or 2 types, W + 2Mo, 23% or less, V or Nb 1 type or 2 types, 12% or less, Co 20% One or two or more kinds of nitride particles and carbonitride particles are dispersed in a base composed of the balance Fe and unavoidable impurities in a total amount of 2 to 20% with respect to the vane weight. The second invention is a material for vanes, wherein the nitride and carbonitride are Ti, Zr, V, Nb, Hf.
The vane material according to the first invention, which is a compound particle of Further, the third invention is that one or more kinds of nitride particles and carbonitride particles are dispersed in the base material having the composition described in the first invention in a total amount of 2 to 20% with respect to the vane weight. It is a characteristic vane. The base in the present invention refers to all of the particles other than the nitride particles and carbonitride particles added separately,
This matrix is achieved by producing a powder of the steel composition that constitutes the matrix. The vane of the present invention is formed by dispersing 1 to 2 or more of 2 to 20% of nitride particles and carbonitride particles in the powder having this matrix composition in a proportion of the total weight of the vane, and sintering. It is manufactured by carrying out. Further, the vane material and the vane of the above-mentioned invention relate to the base material of the vane and can be used as they are. In addition to processing, Ti by CVD or PVD
It can also be used after being subjected to a surface treatment such as a hard film treatment of C, TiN or the like. Such surface treatment lowers the friction coefficient between the vane and the rotor, reduces the galling with the mating material, and protects the base material from the corrosive environment.
【0006】[0006]
【作用】以下に本発明における各元素の作用および数値
の限定理由について述べる。Cは同時に添加するW,M
o,Vなどと結合して硬い炭化物を形成し、耐摩耗性を高
め、相手材とのカジリを少なくする効果がある。また、
一部は基地に固溶して基地の硬さを高くし、耐摩耗性を
向上させる効果もある。したがって、W,Mo,Vなどの
炭化物形成元素の添加量との兼ね合いで最適のC含有量
がある。本発明の範囲ではCが1.0%未満では基地の硬さ
が十分に得られず、形成される炭化物量も少ない。逆に
3.5%を越えると靭性が劣化するので、Cは1.0〜3.5%と
した。The function of each element and the reason for limiting the numerical values in the present invention will be described below. C is added at the same time W, M
Combined with o, V, etc., it forms a hard carbide, which has the effect of increasing wear resistance and reducing galling with the mating material. Also,
Some of them also form a solid solution in the matrix to increase the hardness of the matrix and also have the effect of improving wear resistance. Therefore, there is an optimum C content in consideration of the addition amounts of carbide forming elements such as W, Mo, and V. In the range of the present invention, if C is less than 1.0%, the hardness of the matrix cannot be sufficiently obtained and the amount of carbide formed is small. vice versa
If it exceeds 3.5%, the toughness deteriorates, so C was made 1.0 to 3.5%.
【0007】Siは脱酸元素として鋼質を改良する効果
がある。また、基地に固溶して基地の硬さを高める効果
もある。しかし、1.5%を越えると靭性が低下するのでS
iは1.5%以下とした。Mnも脱酸元素として硬質を改良す
る効果があるので、Mn1.0%以下とした。Si has the effect of improving the steel quality as a deoxidizing element. It also has the effect of increasing the hardness of the base by forming a solid solution in the base. However, if it exceeds 1.5%, the toughness decreases, so S
i was set to 1.5% or less. Since Mn also has an effect of improving hardness as a deoxidizing element, Mn is set to 1.0% or less.
【0008】Crは炭化物を形成して耐摩耗性を高める
効果がある。さらに基質に固溶して焼入れ性を付与し、
また基地の耐食性も向上させる。特に本発明において
は、代替フロンのHFCが吸湿性が高いこと、潤滑油が
分解して蟻酸や酢酸のごときカルボン酸を形成すること
のために、ベーンは軽い腐食環境下において作動してい
る。このために、ベーンにおきる異常摩耗は、単純なア
ブレッシブ型摩耗のみでなく、腐食も介在したメカニズ
ムによって発生しているものと推定される。この場合、
Crの他、後述するMoやCoの基地への固溶がベーンの
耐食性を高め、摩耗を減少させる効果がある。Crが3%
未満では、上記の効果が少なく、逆に6%を越えると熱処
理によって硬さが得られにくくなるなどの理由でCrは3
〜6%とした。Cr has the effect of forming carbides and enhancing wear resistance. Furthermore, it is solid-dissolved in the substrate to give hardenability,
It also improves the corrosion resistance of the base. Particularly in the present invention, the vane operates in a light corrosive environment because the alternative CFC HFC has a high hygroscopic property and the lubricating oil decomposes to form a carboxylic acid such as formic acid and acetic acid. Therefore, it is estimated that the abnormal wear on the vanes is caused not only by simple abrasive wear but also by a mechanism involving corrosion. in this case,
In addition to Cr, Mo and Co, which will be described later, are dissolved in the matrix to enhance the corrosion resistance of the vane and reduce wear. Cr is 3%
If less than 6%, the above effect is small, and if it exceeds 6%, hardness is hardly obtained by heat treatment.
It was set to ~ 6%.
【0009】WおよびMoは、Cと結合して、M6C型の
炭化物を形成し、耐摩耗性、耐カジリ性を高める。ま
た、W、Moの一部は基地に固溶した後、焼もどしで析
出硬化し、基地の硬さを高める効果もある。さらにMo
はカルボン酸による腐食を抑える効果もある。しかし、
W,Moが多量になると靭性が低下するので、W 20%以
下、Mo 10%以下の1種または2種がW+2Mo量で23%以
下とした。W and Mo combine with C to form an M 6 C type carbide, which enhances wear resistance and galling resistance. Further, some of W and Mo are solid-solved in the matrix and then tempered to precipitate and harden, which also has the effect of increasing the hardness of the matrix. Further Mo
Also has the effect of suppressing corrosion due to carboxylic acid. But,
Since the toughness decreases with an increase in W and Mo, one or two kinds of W 20% or less and Mo 10% or less were set to 23% or less in the amount of W + 2Mo.
【0010】VおよびNbは、Cと結合してMC型の炭
化物を形成する。この炭化物をベーン表面に微細かつ均
質に分散させると、耐摩耗性、耐カジリ性を大幅に向上
させ得ることができる。しかし、12%を越えると溶解が
難しいこと、靭性が低下することの理由でVおよびNb
の1種または2種を12%以下とした。V and Nb combine with C to form MC type carbides. When this carbide is finely and uniformly dispersed on the surface of the vane, the wear resistance and the galling resistance can be significantly improved. However, if it exceeds 12%, it is difficult to dissolve and the toughness decreases, so V and Nb
1 type or 2 types was set to 12% or less.
【0011】Coは基地に固溶して基地の硬さを高める
効果がある他、本発明で重要なカルボン酸による腐食を
抑える効果が高い。すなわち、前記のごとく、代替フロ
ンを冷媒に用いると腐食摩耗的作用も併発してベーンの
異常摩耗が起きるが、Coを基地に固溶させることによ
り摩耗を軽減できる。しかし、Coが20%を越えると靭性
が低下するのでCo 20%以下とした。Co has the effect of forming a solid solution in the matrix to increase the hardness of the matrix, and also has a high effect of suppressing the corrosion due to the carboxylic acid, which is important in the present invention. That is, as described above, when the CFC substitute is used as the refrigerant, a corrosive wear action is also caused to cause abnormal wear of the vane, but the wear can be reduced by making Co a solid solution in the base. However, if Co exceeds 20%, the toughness decreases, so the Co was made 20% or less.
【0012】窒化物、炭窒化物粒子の分散は本発明にお
いて、最も重要な構成要件のひとつである。ベーンはロ
ータやシリンダと摺動することにより、圧縮機としての
機能を果たしている。したがって、ベーンのみ耐摩耗性
が強くても相手のシリンダやロータが異常摩耗すると、
機密性が保持できなくなり、圧縮機としての性能は低下
する。ロータやシリンダは一般に鋳鉄でできているの
で、鉄との親和性の小さい窒化物粒子あるいは炭窒化物
粒子を前記鋼組成の基地中に分散させてやると、摩擦係
数が著しく小さくなり、また、相手材とのカジリも起ら
なくなる。この作用によって、ベーン自体も摩耗し難く
なると同時に相手のロータやシリンダの摩耗も極端に少
なくなる。ベーン重量に対して2%未満ではこの効果が十
分でなく、逆に20%を越えると安定した品質のベーンが
大量生産できなくなるので、窒化物、炭窒化物の1種ま
たは2種以上を合計で2〜20%とした。Dispersion of nitride and carbonitride particles is one of the most important constituents in the present invention. The vane functions as a compressor by sliding on the rotor and the cylinder. Therefore, even if the wear resistance of only the vane is strong, if the other cylinder or rotor wears abnormally,
The confidentiality cannot be maintained, and the performance as a compressor deteriorates. Since the rotor and the cylinder are generally made of cast iron, when the nitride particles or carbonitride particles having a small affinity for iron are dispersed in the matrix of the steel composition, the friction coefficient becomes extremely small, and Scoring with the mating material will not occur. Due to this action, the vanes themselves are less likely to wear, and at the same time, the wear of the mating rotor and cylinder is extremely reduced. If the amount is less than 2% of the vane weight, this effect is not sufficient. On the contrary, if it exceeds 20%, stable quality vanes cannot be mass-produced, so one or more of nitrides and carbonitrides must be added together. 2 to 20%.
【0013】なお、窒化物、炭窒化物としては、Ti,Z
r,V,Nb,Hfの化合物が入手し易く、コストも安価なた
めに最適であるが、これら以外のものであっても鉄との
親和性が小さいものであれば効果がある。また、前記窒
化物、炭窒化物粒子を均一に分散できること、基地とな
る鋼中に分散する炭化物粒も微細かつ均一に分散させる
理由から、本発明のベーン用材料は粉末冶金法で製造す
るのが望ましい。As the nitride and carbonitride, Ti, Z
Compounds of r, V, Nb, and Hf are suitable because they are easily available and inexpensive, but other compounds are effective as long as they have a low affinity with iron. Further, the vane material of the present invention is produced by powder metallurgy because the nitride and carbonitride particles can be uniformly dispersed, and because the carbide grains dispersed in the base steel are also finely and uniformly dispersed. Is desirable.
【0014】[0014]
【実施例】以下に実施例を示す。
(実施例1)
表1に示す3種類の鋼組成からなる水アトマイズ粉末を
準備し、これに各種の窒化物、炭窒化物の1種または2
種以上を表2に示す割合で混合した後、プレス成形、焼
結を行なってベーン用材料を作製した。なお、比較のた
めに従来より使用されている通常の溶製高速度鋼SKH
51も作製した。表3には表2に示したベーン材の焼入
れ−焼もどし硬さ(HRC)、摩耗試験による摩耗減量
と摩擦係数、腐食試験による腐食減量をそれぞれ示す。
なお、摩耗試験は以下の要領で実施した。ベーン材を板
とし、ロータ材に相当するFC25をリングに加工して
HFCフロンの代表であるHFC134aを滴下しなが
ら、互いに摺動させ、その摩耗減量を求めた。表2中に
は従来材SKH51を板、FC25をリングとして試験
した時の板、リングそれぞれの摩耗量を1.0として、各
種ベーン材およびリングの摩耗量を相対比較値として求
めて評価した。さらに、そのときの摩擦係数の測定値も
併せて記載した。EXAMPLES Examples will be shown below. (Example 1) Water atomized powder composed of three kinds of steel compositions shown in Table 1 was prepared, and various kinds of nitrides, carbonitrides, or two kinds thereof were prepared.
After mixing at least the seeds in the proportions shown in Table 2, press molding and sintering were performed to prepare a vane material. It should be noted that for the purpose of comparison, a conventional molten high-speed steel SKH that has been used conventionally
51 was also produced. Table 3 shows the quenching-tempering hardness (HRC) of the vane material shown in Table 2, the wear loss and friction coefficient by the wear test, and the corrosion loss by the corrosion test.
The abrasion test was carried out as follows. The vane material was used as a plate, FC25 corresponding to the rotor material was processed into a ring, and HFC134a, which is a representative of HFC Freon, was dropped and slid on each other to determine the wear reduction. In Table 2, the conventional materials SKH51 and FC25 were used as plates, and the wear amount of each plate and ring when tested as a ring was set to 1.0, and the wear amounts of various vane materials and rings were obtained as relative comparison values and evaluated. Furthermore, the measured value of the friction coefficient at that time is also shown.
【0015】[0015]
【表1】 [Table 1]
【0016】[0016]
【表2】 [Table 2]
【0017】[0017]
【表3】 [Table 3]
【0018】腐食試験はHFC系フロン用の潤滑油が分
解して生成するとされている5%蟻酸−5%酢酸水溶液中で
60℃×30h浸漬して、その腐食減量を求めた。表2によ
れば、本発明のベーン材料は従来のSKH51と比較し
てベーンそのものの摩耗が少ないと同時に相手材の摩耗
も減少し、摩擦係数も小さくなるので、実際の圧縮機に
組み込まれたときは、相対的な摩耗量は1/10以下に減少
する。さらには、耐食性も改善されているので、この効
果が相乗して実用的には多大な効果としてして現われ
る。The corrosion test is conducted in a 5% formic acid-5% acetic acid aqueous solution which is said to be produced by the decomposition of a lubricating oil for HFC type CFCs.
It was immersed at 60 ° C for 30 hours, and the corrosion weight loss was calculated. According to Table 2, the vane material of the present invention has less wear of the vane itself as compared with the conventional SKH51, and at the same time, the wear of the mating material is reduced and the friction coefficient is also reduced. At this time, the relative amount of wear decreases to less than 1/10. Further, since the corrosion resistance is also improved, this effect synergizes and appears as a great effect in practical use.
【0019】(実施例2)
表2に示す記号Bと記号Cおよび従来の溶製高速度鋼で
あるSKH51の材料を用いて、実際にベーンを作製
し、HFC134aを冷媒とする実機ロータリーコンプ
レッサに組み込んで寿命評価試験を行なった。なお、実
機テスト中の評価はロータリーコンプレッサに設けた圧
力計の圧力変化によってベーンの摩耗ないし損傷状況を
推定した。実機テストの結果、従来材のSKH51をベ
ーンに用いたテスト機の圧力が運転開始後、131時間目
に圧力が急変したため、運転を停止してベーンの状況を
観察した。その結果、SKH51製のベーンはロータと
摺動する面に部分的なカジリが認められ、一方対向する
ロータ周面にもカジリによる条痕が観察された。これに
対して、本発明の記号Bおよび記号C製のベーンを用い
たロータリーコンプレッサは運転時間が720時間経過し
た後も圧力変化が認められずテストを中止した。Example 2 A vane was actually produced by using the symbols B and C shown in Table 2 and the material of SKH51 which is a conventional molten high speed steel, and was used as an actual rotary compressor using HFC134a as a refrigerant. A built-in life evaluation test was performed. In the evaluation during the actual machine test, the wear or damage of the vane was estimated by the pressure change of the pressure gauge installed in the rotary compressor. As a result of the actual machine test, the pressure of the test machine using the conventional material SKH51 as the vane changed abruptly 131 hours after the start of operation, so the operation was stopped and the condition of the vane was observed. As a result, the SKH51 vanes were partially scratched on the surface sliding with the rotor, while scratches were also observed on the opposing rotor circumferential surface. On the other hand, in the rotary compressor using the vanes made of the symbols B and C of the present invention, the pressure change was not observed even after 720 hours of operation, and the test was stopped.
【0020】(実施例3)
表4に示す4種類の鋼組成からなる粉末を準備し、これ
にTiNの分散粒子を表4に併記したベーン重量全体の
割合で混合した後、プレス成形、焼結を行なってベーン
用材料を作製した。上記4種類のベーン用材料を焼入−
焼もどし処理を行なった後、実施例1と同じ要領で硬さ
(HRC)測定、摩耗試験による摩耗減量と摩耗係数、腐食
試験による腐食減量をそれぞれ求め、その結果を表5に
示す。なお、摩耗減量は実施例1における記号Eの従来
材であるSKH51の摩耗量を1.0として、各種ベーン
材およびリングの摩耗量を相対比較値として求めたもの
である。Example 3 Powders consisting of four kinds of steel compositions shown in Table 4 were prepared, and TiN dispersed particles were mixed in the vane weight ratio shown in Table 4 together, followed by press molding and firing. The material for vanes was produced by binding. Quenching the above four types of vane materials-
After the tempering treatment, the hardness is the same as in Example 1.
(HRC) measurement, wear loss and wear coefficient by wear test, and corrosion weight loss by corrosion test were obtained, and the results are shown in Table 5. The amount of wear reduction is obtained by setting the amount of wear of SKH51, which is the conventional material with the symbol E in Example 1, to 1.0, and the amounts of wear of various vane materials and rings as relative comparison values.
【0021】[0021]
【表4】 [Table 4]
【0022】[0022]
【表5】 [Table 5]
【0023】表5によれば、本発明のベーン用材料であ
る記号1ないし4は、従来のSKH51と比較してベー
ン自身の摩耗が少ないのと同時に、摩擦係数が低いため
に相手材の摩耗をも軽減することがわかる。また、両者
の摩耗量の改善には、耐食性の向上効果も寄与している
ものと考えられる。According to Table 5, the symbols 1 to 4 as the vane material of the present invention show less wear of the vane itself as compared with the conventional SKH51, and at the same time, the wear of the mating material due to the low friction coefficient. It can be seen that it also reduces Further, it is considered that the effect of improving the corrosion resistance also contributes to the improvement of the wear amount of both.
【0024】[0024]
【発明の効果】本発明によれば、HFC系フロンに代表
される代替フロンを冷媒とする圧縮機において、従来の
ベーン材料であるSKH51クラスでは不十分であった
ベーンの耐摩耗性が大幅に向上する。また本発明のベー
ンは、HFC系フロン用圧縮機の潤滑油が分解して形成
される蟻酸や酢酸のごとき、カルボン酸に対しても耐食
性が大きい。したがって本発明のベーンは、大きい耐摩
耗性と耐食性により新しい冷媒に対応できるので環境規
制に対応した圧縮機が実用化できるものである。EFFECTS OF THE INVENTION According to the present invention, in a compressor using an alternative CFC represented by HFC type CFC as a refrigerant, the wear resistance of the vane, which has been insufficient in the conventional SKH51 class of vane material, is significantly improved. improves. Further, the vane of the present invention has a high corrosion resistance against carboxylic acids such as formic acid and acetic acid formed by the decomposition of the lubricating oil of the HFC-based CFC compressor. Therefore, the vane of the present invention can be applied to a new refrigerant due to its large wear resistance and corrosion resistance, so that a compressor that meets environmental regulations can be put to practical use.
【図1】ロータリーコンプレッサの一例を示す断面図で
ある。FIG. 1 is a cross-sectional view showing an example of a rotary compressor.
1 ベーン 2 ロータ 3 シリンダ 4 スプリング 1 vane 2 rotor 3 cylinders 4 spring
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成3年8月28日[Submission date] August 28, 1991
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0014[Correction target item name] 0014
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0014】[0014]
【実施例】以下に実施例を示す。
(実施例1)
表1に示す3種類の鋼組成からなる水アトマイズ粉末を
準備し、これに各種の窒化物、炭窒化物の1種または2
種以上を表2に示す割合で混合した後、プレス成形、焼
結を行なってベーン用材料を作製した。なお、比較のた
めに従来より使用されている通常の溶製高速度鋼SKH
51も作製した。表3には表2に示したベーン材の焼入
れ−焼もどし硬さ(HRC)、摩耗試験による摩耗減量
と摩擦係数、腐食試験による腐食減量をそれぞれ示す。
なお、摩耗試験は以下の要領で実施した。ベーン材を板
とし、ロータ材に相当するFC25をリングに加工して
HFCフロンの代表であるHFC134aと相溶性のエ
ステル系潤滑油を滴下しながら、互いに摺動させ、その
摩耗減量を求めた。表2中には従来材SKH51を板、
FC25をリングとして試験した時の板、リングそれぞ
れの摩耗量を1.0として、各種ベーン材およびリングの
摩耗量を相対比較値として求めて評価した。さらに、そ
のときの摩擦係数の測定値も併せて記載した。EXAMPLES Examples will be shown below. (Example 1) Water atomized powder composed of three kinds of steel compositions shown in Table 1 was prepared, and various kinds of nitrides, carbonitrides, or two kinds thereof were prepared.
After mixing at least the seeds in the proportions shown in Table 2, press molding and sintering were performed to prepare a vane material. It should be noted that for the purpose of comparison, a conventional molten high-speed steel SKH that has been used conventionally
51 was also produced. Table 3 shows the quenching-tempering hardness (HRC) of the vane material shown in Table 2, the wear loss and friction coefficient by the wear test, and the corrosion loss by the corrosion test.
The abrasion test was carried out as follows. The vane material was used as a plate, FC25 corresponding to the rotor material was processed into a ring, and ester lubricant oil compatible with HFC134a, which is a representative of HFC flon, was dropped and slid on each other to determine the wear reduction amount. In Table 2, the conventional material SKH51 is a plate,
When the wear amount of each of the plate and the ring when FC25 was tested as a ring was set to 1.0, the wear amount of each vane material and the ring was obtained as a relative comparison value and evaluated. Furthermore, the measured value of the friction coefficient at that time is also shown.
【手続補正2】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0018[Correction target item name] 0018
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0018】腐食試験はHFC系フロン用のエステル系
潤滑油が分解して生成するとされている5%蟻酸−5%酢酸
水溶液中で60℃×30h浸漬して、その腐食減量を求め
た。表2によれば、本発明のベーン材料は従来のSKH
51と比較してベーンそのものの摩耗が少ないと同時に
相手材の摩耗も減少し、摩擦係数も小さくなるので、実
際の圧縮機に組み込まれたときは、相対的な摩耗量は1/
10以下に減少する。さらには、耐食性も改善されている
ので、この効果が相乗して実用的には多大な効果として
して現われる。In the corrosion test, the weight loss of corrosion was determined by immersing the product in a 5% formic acid-5% acetic acid aqueous solution, which is said to be produced by decomposition of an ester type lubricating oil for HFC type CFCs, at 60 ° C. for 30 hours. According to Table 2, the vane material of the present invention has the conventional SKH
Compared with 51, the wear of the vane itself is less, the wear of the mating material is reduced at the same time, and the friction coefficient is also smaller. Therefore, when installed in an actual compressor, the relative wear amount is 1 /
Reduced to 10 or less. Further, since the corrosion resistance is also improved, this effect synergizes and appears as a great effect in practical use.
Claims (3)
Mn 1.0%以下、Cr 3〜6%と、W 20%以下、Mo 10%以下
の1種または2種がW+2Moで23%以下、V,Nbの1種
または2種を12%以下、Co 20%以下を含み、残部Feお
よび不可避的不純物からなる基地に、窒化物粒子、炭窒
化物粒子の1種または2種以上をベーン重量に対して合
計で2〜20%分散させたことを特徴とするベーン用材料。1. C 1.0 to 3.5% by weight, Si 1.5% or less,
Mn 1.0% or less, Cr 3 to 6%, W 20% or less, Mo 10% or less 1 or 2 are W + 2Mo, 23% or less, V, Nb 1 or 2 12% or less, Co 20 % Or less, and one or two or more kinds of nitride particles and carbonitride particles are dispersed in a base consisting of the balance Fe and unavoidable impurities in a total amount of 2 to 20% with respect to the vane weight. Material for vane.
の化合物粒子である請求項1に記載のベーン用材料。2. The nitride and carbonitride are Ti, Zr, V, Nb and Hf.
The vane material according to claim 1, wherein the vane material is the compound particles.
窒化物粒子、炭窒化物粒子の1種または2種以上をベー
ン重量に対して合計で2〜20%分散させたことを特徴とす
るベーン。3. A base comprising the composition of claim 1,
A vane comprising one or more of nitride particles and carbonitride particles dispersed in a total amount of 2 to 20% based on the weight of the vane.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16660591A JP3182794B2 (en) | 1991-07-08 | 1991-07-08 | Vane materials and vanes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16660591A JP3182794B2 (en) | 1991-07-08 | 1991-07-08 | Vane materials and vanes |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH059661A true JPH059661A (en) | 1993-01-19 |
JP3182794B2 JP3182794B2 (en) | 2001-07-03 |
Family
ID=15834400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16660591A Expired - Fee Related JP3182794B2 (en) | 1991-07-08 | 1991-07-08 | Vane materials and vanes |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3182794B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5516269A (en) * | 1994-03-30 | 1996-05-14 | Sumitomo Electric Industries, Ltd. | Zirconia vane for rotary compressors |
US5754935A (en) * | 1993-06-11 | 1998-05-19 | Hitachi Metals, Ltd. | Vane material and process for preparing same |
JP2006169624A (en) * | 2004-11-18 | 2006-06-29 | Hitachi Metals Ltd | Cold die steel having excellent dimensional change suppression property and galling resistance |
-
1991
- 1991-07-08 JP JP16660591A patent/JP3182794B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5754935A (en) * | 1993-06-11 | 1998-05-19 | Hitachi Metals, Ltd. | Vane material and process for preparing same |
US5516269A (en) * | 1994-03-30 | 1996-05-14 | Sumitomo Electric Industries, Ltd. | Zirconia vane for rotary compressors |
JP2006169624A (en) * | 2004-11-18 | 2006-06-29 | Hitachi Metals Ltd | Cold die steel having excellent dimensional change suppression property and galling resistance |
Also Published As
Publication number | Publication date |
---|---|
JP3182794B2 (en) | 2001-07-03 |
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