JPS62167924A - Silicon carbide sliding member - Google Patents
Silicon carbide sliding memberInfo
- Publication number
- JPS62167924A JPS62167924A JP733886A JP733886A JPS62167924A JP S62167924 A JPS62167924 A JP S62167924A JP 733886 A JP733886 A JP 733886A JP 733886 A JP733886 A JP 733886A JP S62167924 A JPS62167924 A JP S62167924A
- Authority
- JP
- Japan
- Prior art keywords
- sic
- sliding member
- friction
- stainless steel
- sintered body
- 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.)
- Pending
Links
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 35
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 32
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 16
- 239000010935 stainless steel Substances 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 16
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000000314 lubricant Substances 0.000 abstract description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 2
- 229910003465 moissanite Inorganic materials 0.000 abstract description 2
- 239000003960 organic solvent Substances 0.000 abstract description 2
- 239000005011 phenolic resin Substances 0.000 abstract description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 2
- 229910021431 alpha silicon carbide Inorganic materials 0.000 abstract 1
- -1 and C Inorganic materials 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 12
- 230000007797 corrosion Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005245 sintering Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Mechanical Sealing (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、炭化けい素（Ｓｔ Ｃ）を主成分とする焼結
体とステンレス鋼とを組合わせた摩擦係数の低い囲動部
材に関し、特に、耐食性が強く要求され、かつ油潤滑が
適用しにくい条件下で使用する機械的要素に好適なＳｉ
Ｃ摺動部材に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a surrounding member with a low coefficient of friction that combines a sintered body mainly composed of silicon carbide (St C) and stainless steel. In particular, Si is suitable for mechanical elements used under conditions where corrosion resistance is strongly required and oil lubrication is difficult to apply.
Regarding C sliding members.
一般にセラミックスは耐摩耗性、耐食性、耐熱性が良好
なことから摺動部材としての用途が考えられる。特にＳ
ｉＣを主成分とする焼結体は、上記性質を有するのみな
らず熱伝導性が高く、囲動面で発生する熱の放散がよく
なるため、摺動部材として好適な材料であることが予想
され、耐食性や耐摩耗性を強く要求されるメカニカルシ
ールや腐蝕性液に用いる流体ポンプの軸受或いは各種流
量計の軸受などに優れた特性を発揮することが期待され
る。In general, ceramics have good wear resistance, corrosion resistance, and heat resistance, so they can be used as sliding members. Especially S
A sintered body containing iC as a main component not only has the above properties but also has high thermal conductivity, which improves the dissipation of heat generated on the surrounding surface, so it is expected to be a suitable material for sliding members. It is expected that it will exhibit excellent properties in mechanical seals that require strong corrosion resistance and wear resistance, bearings in fluid pumps used for corrosive liquids, and bearings in various flow meters.
一般に軸受けにはｎ滑油が使用されるが、耐食性が強く
要求されるメカニカルシールや耐食性ポンプの軸受には
油ｒ８ｉｆｌが適用できないことが多く、無潤滑或いは
腐蝕性液体中で摩擦係数の低いことが要求される。In general, lubricating oil is used for bearings, but oil r8ifl is often not applicable to mechanical seals that require strong corrosion resistance or bearings for corrosion-resistant pumps, and it is difficult to use lubricating oil because it has a low coefficient of friction in the absence of lubrication or in corrosive liquids. is required.
ところで、セラミックスは摺動部材として優れた性質を
有するが、ＳｉＣ焼結体を含めて、セラミックス同志を
無潤滑油状態で摺動させた場合、その摩擦係数は０．１
以上と高く、特に流は計のような高精度でかつ敏感な応
答が要求される機械要素には使用出来ない欠点があった
。By the way, ceramics have excellent properties as sliding members, but when ceramics, including SiC sintered bodies, are slid together without lubricating oil, the coefficient of friction is 0.1.
In particular, the high flow rate has the disadvantage that it cannot be used in mechanical elements such as flowmeters that require highly accurate and sensitive response.
本発明者等は上記の事情に鑑み、油潤滑剤を用いないで
水或いは腐蝕性の液中で使用出来、しかも摩擦係数の小
さい潜動部材を得るべく、種々なセラミックス同志或い
はセラミックスと金属とを組合わせた摺動部材について
鋭意研究を行なった結果、ＳｉＣ焼結体と耐食性金属と
の組合わせたものが、摩擦抵抗の小さいことを発見した
。In view of the above-mentioned circumstances, the inventors of the present invention have developed various ceramics or ceramics and metals in order to obtain a sliding member that can be used in water or corrosive liquids without using an oil lubricant and has a small coefficient of friction. As a result of intensive research on sliding members that combine SiC sintered bodies and corrosion-resistant metals, it was discovered that the combination of SiC sintered bodies and corrosion-resistant metals has low frictional resistance.
本発明は上記の発見に基づいて行なわれたもので、耐食
性に優れしかもＩＬ！擦係数の低い摺動部材を提供する
ことを目的とする。The present invention was made based on the above discovery, and has excellent corrosion resistance and IL! An object of the present invention is to provide a sliding member with a low coefficient of friction.
本発明は上記の目的を達成するためになされたもので、
その要旨は、ＳｉＣを主成分とする焼結体とステンレス
鋼との組合わせからなるＳｉＣ摺動部材にある。The present invention has been made to achieve the above objects,
The gist of this is a SiC sliding member made of a combination of a sintered body mainly composed of SiC and stainless steel.
〔発明の具体的構成および作用〕 以下本発明の詳細な説明する。[Specific structure and operation of the invention] The present invention will be explained in detail below.
本発明に用いるＳｉＣは、α−３ｉ Ｃ，β−８ｉＣ或
いはこれらの混合物でもよい。The SiC used in the present invention may be α-3iC, β-8iC, or a mixture thereof.
またＳｉＣ焼結体は、その密度を高めるため公知の次の
方法によってつくられる。すなわち、（１）ＳｉＣ粉末
に、Ｃ粉末：０．５〜５ｗｔ％。Further, the SiC sintered body is produced by the following known method in order to increase its density. That is, (1) SiC powder and C powder: 0.5 to 5 wt%.
Ｂ粉末＝０．１〜２ｗｔ％を添加し、成形した後、これ
を焼結する方法。A method in which 0.1 to 2 wt% of B powder is added, molded, and then sintered.
（２）Ｓｉ Ｃ粉末に、Ｃ粉末二０．５〜５ｗｔ％。(2) 0.5 to 5 wt% of C powder to SiC powder.
Ａ１粉末：０，１〜３．Ｑｗｔ％を添加し、成形した後
、これを焼結する方法。A1 powder: 0.1-3. A method in which Qwt% is added, molded, and then sintered.
（３）ＳｉＣ粉末に、Ｃ粉末二〇、５〜５ｗｔ％。(3) 20.5 to 5 wt% of C powder to SiC powder.
Ｂ粉末：０．１〜１．０ｗｔ％、ＡＩ粉末二０．１〜２
．Ｑｗｔ％を添加し、成形した後、これを焼結する方法
。B powder: 0.1-1.0 wt%, AI powder 2 0.1-2
．． A method in which Qwt% is added, molded, and then sintered.
（４）ＳｉＣ粉末とＣ粉末および／または炭化可能な有
機物との組合わせからなる成形物を加熱下（Ｓｉの融点
以上）で液状の３ｉ或はＳｉ ０２の蒸気と接融させて
反応焼結させる方法。(4) Reactive sintering by melting a molded product made of a combination of SiC powder, C powder, and/or carbonizable organic matter with liquid 3i or Si02 vapor under heating (above the melting point of Si). How to do it.
があり、特に耐食性を要求される場合には、通常の焼結
体１反応焼結体いずれにおいても（１）の配合のものが
好ましい。In particular, when corrosion resistance is required, the formulation (1) is preferable for any ordinary sintered body and 1-reaction sintered body.
これらの方法において、成形を行なうにはＳｉＣ粉末に
、上記粉末を添加し、さらにポリビニールアルコール或
いは有機溶剤に溶解したフェノール樹脂等を加えて混合
し、これを加圧して成形体とする。In these methods, for molding, the above-mentioned powder is added to SiC powder, a phenol resin dissolved in polyvinyl alcohol or an organic solvent, etc. is added and mixed, and the mixture is pressed to form a molded body.
また、焼結は、上記成形体を無加圧状態、或いはホット
プレス等によって加圧した状態で、１８００〜２０００
℃に焼成して行なわれる。しかし、形状が複離なものは
、通常無加圧で焼結される。In addition, sintering is carried out at a temperature of 1,800 to 2,000 with the above-mentioned molded body under no pressure or under pressure using a hot press or the like.
This is done by firing at ℃. However, those with complex shapes are usually sintered without pressure.
上記反応焼結においては、ＳｌとＣとが反応してＳｉＣ
となり、ＳｉＣ粉末を焼結させるが、通常Ｓｉの一部は
未反応で残留する。その残留量は、耐食性の点から８ｗ
ｔ％以下であることが望ましい。In the above reaction sintering, Sl and C react to form SiC
As a result, the SiC powder is sintered, but normally some Si remains unreacted. The residual amount is 8w from the viewpoint of corrosion resistance.
It is desirable that it is t% or less.
得られたＳｉＣ焼結体は、ＳｉＣの含有ｍがｇ□ｗｔ％
以上で、残部は上記添加成分と不可避不純成分であり、
反応焼結体においては、上記残部に残ｆＢｓ；が加わる
。また強度上、焼結体の密度は、ＳｉＣ理論密度の９０
％以上で、有する気孔の径は１０μ厄以下であることが
望ましい。The obtained SiC sintered body has a SiC content m of g□wt%
With the above, the remainder is the above added ingredients and unavoidable impurity ingredients,
In the reaction sintered body, the remainder fBs is added to the above remainder. In addition, for strength reasons, the density of the sintered body is 90% of the theoretical density of SiC.
% or more, and the diameter of the pores is preferably 10 μm or less.
また、ＳｉＣ焼結体と組合わされるステンレス鋼は、Ｊ
ＩＳによって規定されているものがいずれも使用出来る
が、ステンレス鋼中のＣ成分含有量がＱ、１ｗｔ％以下
、特に０．０６ｗｔ％以下のものが、低い摩擦係数を示
すので好ましい。Furthermore, the stainless steel used in combination with the SiC sintered body is J
Any of those specified by IS can be used, but stainless steel with a C component content of Q of 1 wt% or less, particularly 0.06 wt% or less is preferable because it exhibits a low coefficient of friction.
上記ＳｉＣ焼結体とステンレス鋼とを組合わせた摺動部
材は、油潤滑材を用いることなく低い摩擦係数が得られ
る。特に水潤滑において摩擦係数は極めて低くなり、さ
らにステンレス鋼のＣ含有量の低いものを選ぶことによ
って、容易にｒｉＪ擦係数０．０５以下とすることが出
来、僅かの力によって摺動するｌ！！！初部材が得られ
る。また、ＳｉＣ焼結体、ステンレス鋼は、共に耐食性
に優れているので、水の代りに腐蝕性液を用いることが
出来る。したがって、腐蝕性液体のポンプの軸受や高性
能で、かつ敏感な応答を要求される各種流量計等の摺動
部材として好適である。A sliding member made by combining the SiC sintered body and stainless steel can obtain a low coefficient of friction without using an oil lubricant. Particularly in water lubrication, the coefficient of friction becomes extremely low, and by choosing a stainless steel with a low C content, it is easy to reduce the coefficient of friction to less than 0.05. ! ! The first part is obtained. Furthermore, since both the SiC sintered body and stainless steel have excellent corrosion resistance, a corrosive liquid can be used instead of water. Therefore, it is suitable as a bearing for a corrosive liquid pump or a sliding member in various flowmeters that require high performance and sensitive response.
次に実浦例を示して本発明を説明する。Next, the present invention will be explained with reference to a Saneura example.
（実施例１）
ステンレス鋼として５ｔＪＳ ３０４Ｌを用い、各種
材料と組合わせて摩擦係数を測定した。１１■係数の測
定はリングオンリング法を用い、無潤滑で、荷重：２Ｋ
ｙｆ、！Ｆ？動面の相対速度：０．２ｍ／ Ｓｅｃの条
件で行なった。また、用いたＳｉＣ焼結体は、Ｓｉ Ｃ
：９７．７ｗｔ％、Ｃ：１．５ｗｔ％。(Example 1) Using 5tJS 304L as stainless steel, the coefficient of friction was measured in combination with various materials. 11 ■ The coefficient was measured using the ring-on-ring method, without lubrication, and with a load of 2K.
yf,! F? The test was carried out under conditions of relative velocity of moving surface: 0.2 m/Sec. Moreover, the SiC sintered body used was SiC
:97.7wt%, C:1.5wt%.
８：０．３ｗｔ％、密度：３．１６！？／ｃｍ’で、常
圧焼結したものである。測定結果を第１表に示す。8: 0.3wt%, density: 3.16! ? /cm' and was sintered under normal pressure. The measurement results are shown in Table 1.
第 １ 表
第１表より明かなように、ＳｉＣ焼結体とステンレス鋼
との組合わせの摩擦係数が最も低いことがわかる。Table 1 As is clear from Table 1, it can be seen that the combination of SiC sintered body and stainless steel has the lowest coefficient of friction.
（実施例２）
炭素成分の含有量が異なる各種ステンレス鋼とＳｉＣ焼
結体とをそれぞれ組合わせて摩擦係数を測定した。用い
たＳｉＣ焼結体は通常の焼結法（１）の配合で常圧焼結
したＳｉＣ分９７１％の焼結体（以下Ｎ５ＳＣという）
、および反応焼結された添加物の配合が上記（１）と同
じで、含有３ｉが５ｗｔ％の反応焼結体（以下ＲＢＳＣ
という）である。摩擦係数の測定は、リングオンリング
法を用い、水潤滑、荷重：５Ｋｇｆ、）！！！動面の相
対速度：０．２ｍ／ｓｅｃの条件で行なった。結果を第
２表に示す。(Example 2) The coefficient of friction was measured for each combination of various stainless steels with different carbon component contents and SiC sintered bodies. The SiC sintered body used was a sintered body with a SiC content of 971% (hereinafter referred to as N5SC), which was sintered under normal pressure using the usual sintering method (1).
, and the reaction-sintered additive composition is the same as in (1) above, and the content of 3i is 5 wt% (hereinafter referred to as RBSC).
). The friction coefficient was measured using the ring-on-ring method, water lubrication, load: 5Kgf, )! ! ! The test was conducted under the condition that the relative velocity of the moving surface was 0.2 m/sec. The results are shown in Table 2.
第 ２ 表
第２表より明らかなように、ＳｉＣ焼結体とステンレス
鋼とを組合わせた摺動部材を水潤滑した場合のａ！擦係
数は小さく、また、ステンレス中のＣの含有量が小さい
程、１１１？ｆｆ係数が低下することがわかる。Table 2 As is clear from Table 2, the a! The coefficient of friction is smaller, and the lower the C content in stainless steel, the lower the coefficient of friction (111?). It can be seen that the ff coefficient decreases.
以上述べたように、本発明の囲動部材は耐熱性耐食性、
耐摩耗性でしかも熱伝導性の良好なＳｉＣ焼結体とステ
ンレス鋼とを組合わせたもので、油潤滑材を用いること
なく低いｒＭ擦係数を示し、特に水潤滑におけるｆ！Ａ
ｍ係数が極めて低いので、腐蝕性液ポンプの軸受、或い
は各種流ｍ計等に使用される高性能で敏感な応答を必要
とする摺動部材として極めて優れたものである。As described above, the surrounding member of the present invention has heat resistance, corrosion resistance,
It is a combination of SiC sintered body, which is wear resistant and has good thermal conductivity, and stainless steel, and shows a low rM friction coefficient without using oil lubricant, especially f! in water lubrication. A
Since the m coefficient is extremely low, it is extremely excellent as a sliding member that requires high performance and sensitive response, such as bearings for corrosive liquid pumps or various flowmeters.
Claims (2)
との組合わせからなることを特徴とする炭化けい素摺動
部材。(1) A silicon carbide sliding member characterized by being made of a combination of a sintered body containing silicon carbide as a main component and stainless steel.
下のステンレス鋼である特許請求の範囲第１項記載の炭
化けい素摺動部材。(2) The silicon carbide sliding member according to claim 1, wherein the stainless steel has a carbon content of 0.1% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP733886A JPS62167924A (en) | 1986-01-17 | 1986-01-17 | Silicon carbide sliding member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP733886A JPS62167924A (en) | 1986-01-17 | 1986-01-17 | Silicon carbide sliding member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62167924A true JPS62167924A (en) | 1987-07-24 |
Family
ID=11663155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP733886A Pending JPS62167924A (en) | 1986-01-17 | 1986-01-17 | Silicon carbide sliding member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62167924A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6073123A (en) * | 1983-09-30 | 1985-04-25 | Ebara Corp | Combined sliding member |
-
1986
- 1986-01-17 JP JP733886A patent/JPS62167924A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6073123A (en) * | 1983-09-30 | 1985-04-25 | Ebara Corp | Combined sliding member |
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