JPS642679B2 - - Google Patents
Info
- Publication number
- JPS642679B2 JPS642679B2 JP6345979A JP6345979A JPS642679B2 JP S642679 B2 JPS642679 B2 JP S642679B2 JP 6345979 A JP6345979 A JP 6345979A JP 6345979 A JP6345979 A JP 6345979A JP S642679 B2 JPS642679 B2 JP S642679B2
- Authority
- JP
- Japan
- Prior art keywords
- composite plating
- plating
- composite
- experiment
- sliding surface
- 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.)
- Expired
Links
- 238000007747 plating Methods 0.000 claims description 47
- 239000002131 composite material Substances 0.000 claims description 29
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 229910052582 BN Inorganic materials 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000000314 lubricant Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 2
- 239000010419 fine particle Substances 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 14
- 239000010410 layer Substances 0.000 description 12
- 239000002585 base Substances 0.000 description 11
- 239000006185 dispersion Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000003746 surface roughness Effects 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
- Chemically Coating (AREA)
Description
本発明は、複合メツキ処理する素地にあらかじ
め凹凸を形成させ、その面上に複合メツキを施
し、凹凸面を有する複合メツキ層を形成させた摺
動面に関するものである。
固体潤滑剤である、たとえばボロンナイトライ
ド（以下BNと称す）を複合材とした複合メツキ
において、メツキ素地に凹凸処理を施さず複合メ
ツキを施せば、第１図に示すように、BN３が分
散している平たんな複合メツキ層２が形成され
る。この複合メツキ層２には固体潤滑剤３が分散
しているから、この複合メツキ被膜２は潤滑性を
有する表面状態を形成している。しかしながら、
複合メツキ層の表面が平たんであるために、他の
面と摺動するとき、それらの面の間に存在させた
潤滑油膜の保持性が悪く、潤滑性能が低下する原
因となる。
本発明の目的は、凹凸を有する複合メツキ被膜
を素地面上に形成させ、固体潤滑剤の潤滑性と複
合メツキ被膜の凹部を潤滑油だめとして利用し、
油の保持性を著しく向上させ、それによつて、潤
滑性を一層高めた摺動面を提供するにある。
本発明の摺動面は、例えば２サイクルピストン
に適用することができる。
本発明の潤滑性複合メツキ被膜を形成させるた
めには、前もつて素地、例えば２サイクルピスト
ンのアルミニウム素地に凹凸を形成する必要があ
る。その方法として物理的および化学的方法があ
り、物理的方法としてはシヨツトブラスト法、条
こんを形成させる方法などがあり、化学的方法と
しては、酸あるいはアルカリによるエツチング法
などがある。シヨツトブラスト法や酸あるいはア
ルカリによるエツチング法では、形あるいは間隔
などが比較的不ぞろいな凹凸が形成され、機械加
工法では、第２図のように凹凸の間隔ａおよび高
さｂが一定の均斉な条こんが形成される。
このように物理的あるいは化学的方法、または
これらを組合せた方法で処理して凸部４および凹
部５を有する素地１を形成し、この凹凸面に潤滑
性複合メツキを施すと、第３図に示すような凸部
６および凹部７のある潤滑性複合メツキ層２が形
成される。メツキ層２の厚さは、通常５〜25μ、
平均15μ程度である。他の面と摺動するときにこ
の凹部７は潤滑油を保持し、優れた潤滑性を発揮
することができる。
本発明の潤滑性複合メツキ被膜に、上記の特徴
を効果的に持たせるためには、物理的および／ま
たは化学的方法で凹凸を素地表面に高低差が10〜
30μ程度になるように施すこと、使用する固体潤
滑剤BNは１〜10μの粒径を有すること、および
複合メツキ被膜中にBNの個数が50×50μの面積
当り20個以上で50個以下、好適には25〜35個分散
されていることが必要である。BNの個数が20個
以下であると複合メツキとしての潤滑性を得るこ
とが難しく、50個以上になるとメツキ液中のBN
の濃度が大となりすぎてメツキ製品の不良率が高
くなるとともに、メツキ被膜がもろくなる。
以上述べたように、本発明の複合メツキ摺動面
は、素地の表面に10〜30μの高低差を有する凹凸
部を形成したので、複合メツキの密着性が向上
し、５〜25μの厚さの被膜層を形成することがで
きる。また、固体潤滑剤の粒子径１〜10μに応じ
て素地表面の凹凸部の高低差を選択すれば良いの
で、常に一定の凹凸面を有する被膜層を形成でき
ることから、充分な潤滑油を保持することができ
る。
実施例 １
＜Falexタイプの摩耗試験機による耐かじり性実
験＞
本実験は、Pin―BlockV型を使用し、Pin及び
BlockはSCM415材で作成した。
そして、Pinのみ下記表に示す条件のめつき等
を施し、実験した。尚実験は乾式及び湿式、すな
わち、潤滑油の供給有無の２タイプを実施した
が、乾式の方は、無処理硬質クロムめつき及び
Ni―BN分散めつきともに、実験初期においてか
じりが発生し、実験不可であつた。このため湿式
実験結果のみ下に示す。
The present invention relates to a sliding surface in which irregularities are formed in advance on a base material to be subjected to composite plating treatment, and composite plating is applied on the surface to form a composite plating layer having an irregular surface. In composite plating using a solid lubricant such as boron nitride (hereinafter referred to as BN) as a composite material, if the composite plating is applied without roughening the plating base, BN3 will be dispersed as shown in Figure 1. A flat composite plating layer 2 is formed. Since the solid lubricant 3 is dispersed in this composite plating layer 2, this composite plating film 2 forms a surface state having lubricity. however,
Since the surface of the composite plating layer is flat, when it slides against other surfaces, the lubricating oil film that is present between the surfaces is poorly retained, which causes a decrease in lubrication performance. The purpose of the present invention is to form a composite plating film having irregularities on a base surface, utilize the lubricity of a solid lubricant and the recesses of the composite plating film as a lubricating oil reservoir,
It is an object of the present invention to provide a sliding surface which has significantly improved oil retention and thereby has further improved lubricity. The sliding surface of the present invention can be applied to, for example, a two-stroke piston. In order to form the lubricious composite plating film of the present invention, it is necessary to form irregularities on the front base material, such as the aluminum base material of a two-stroke piston. There are physical and chemical methods for this. Physical methods include shot blasting, a method of forming stripes, etc., and chemical methods include etching with acid or alkali. In the shot blasting method and the etching method using acid or alkali, unevenness is formed that is relatively irregular in shape or spacing, whereas in the machining method, the spacing a and height b of the unevenness are uniform and uniform, as shown in Figure 2. Najokon is formed. When the substrate 1 having convex portions 4 and concave portions 5 is formed by processing using physical or chemical methods, or a combination thereof, and a lubricating composite plating is applied to this uneven surface, the result shown in Fig. 3 is obtained. A lubricious composite plating layer 2 having convex portions 6 and concave portions 7 as shown is formed. The thickness of the plating layer 2 is usually 5 to 25μ,
The average diameter is about 15μ. When sliding against another surface, this recess 7 retains lubricating oil and can exhibit excellent lubricity. In order to effectively provide the above-mentioned characteristics to the lubricating composite plating film of the present invention, it is necessary to create irregularities on the base surface by physical and/or chemical methods such that the height difference is 10 to 10.
The solid lubricant BN used should have a particle size of 1 to 10μ, and the number of BN in the composite plating film should be 20 or more and 50 or less per area of 50 x 50μ. It is preferable that 25 to 35 particles be dispersed. If the number of BN is less than 20, it is difficult to obtain lubricity as a composite plating, and if the number is more than 50, BN in the plating liquid will be difficult to obtain.
If the concentration of plating becomes too high, the defective rate of plating products increases and the plating film becomes brittle. As described above, the composite plating sliding surface of the present invention has an uneven portion having a height difference of 10 to 30 μm on the surface of the substrate, so the adhesion of the composite plating is improved, and the sliding surface has a thickness of 5 to 25 μm. It is possible to form a coating layer of. In addition, since the height difference of the uneven portions on the substrate surface can be selected according to the particle size of the solid lubricant from 1 to 10 μm, a film layer with a constant uneven surface can be formed at all times, so that sufficient lubricating oil can be retained. be able to. Example 1 <Scale resistance experiment using a Falex type abrasion tester> This experiment used a Pin-Block V type, and the Pin and
The block was made from SCM415 material. Then, only the pins were subjected to plating under the conditions shown in the table below, and an experiment was conducted. The experiment was conducted using two types: dry and wet, that is, with and without lubricating oil.
In both cases of Ni-BN dispersion, galling occurred in the early stages of the experiment, making the experiment impossible. Therefore, only the results of the wet experiment are shown below.
【表】
この結果より次の様な結論を得る。
１ Ni―BNめつきは、硬質クロムめつきに比
べ、同等かそれ以上である。特に、No.４及びNo.
５の２タイプは、硬質クロムめつきの約２倍の
性能を有する。
２ No.３タイプ、すなわち、粒子径0.7μのBNを
用いたNi―BN分散めつき被膜は、粒子が小さ
いため、めつき被膜中のBN粒子の占める面積
率が極めて小さいため、潤滑効果が発揮され得
ないと考える。
３ No.５タイプ、すなわち、粒子径13μのBNを
用いたNi―BN分散めつき被膜は、粒子が大き
いこと及びこの粒子を確実に共析させるため、
めつき被膜を厚くする必要があること等のた
め、Pin表面の面粗さが大きくなり、その結
果、相手Blockを損傷し、良好でなかつた。
以上より、Ni―BN分散めつきにおけるBN粒
子は、１〜10μが最適である。
実験例 ２
＜摺動抵抗測定装置による耐かじり性実験＞
本実験は、スライドテーブル上に試料を置き、
試料表面に垂直に、先端をバフ研磨仕上げを施し
た工具を当て、荷重を種々変えて、かじり性を評
価するものである。尚、本実験は湿式であるが、
油は常時給油でなく、初期にのみ油を塗布し実験
した。試料は全てNi―BN分散めつき被膜であ
る。[Table] From these results, the following conclusions can be drawn. 1 Ni-BN plating is equivalent to or better than hard chrome plating. In particular, No. 4 and No.
Type 5 has approximately twice the performance of hard chrome plating. 2 Type No. 3, that is, the Ni-BN dispersion plating film using BN with a particle size of 0.7μ, has small particles and the area ratio occupied by the BN particles in the plating film is extremely small, so the lubrication effect is low. I don't think it can be demonstrated. 3 The No. 5 type, that is, the Ni-BN dispersion plating film using BN with a particle size of 13μ, has large particles and in order to reliably eutectoid the particles,
Due to the need to thicken the plating film, the surface roughness of the Pin increased, resulting in damage to the mating block, which was not good. From the above, the optimal size of BN particles in Ni-BN dispersion plating is 1 to 10μ. Experimental example 2 <Scale resistance experiment using a sliding resistance measuring device> In this experiment, a sample was placed on a slide table,
A tool with a buffed tip is applied perpendicular to the sample surface, and the load is varied to evaluate the galling property. Although this experiment is a wet method,
The experiment was conducted by applying oil only at the initial stage, rather than by constantly applying oil. All samples are Ni-BN dispersion plated coatings.
【表】
を前提にスライド実験を行い、かじり評価するも
のである。そしてかじり評価の項で、○は
かじり発生ナシ、×はかじり発生を意味する。
評 価
１ 以上の実験で最も良好なのは、タイプ３であ
り、すなわち、素材面粗さ：15z、めつき膜
厚：10μ、分散めつき被膜の面粗さ：13zであ
つた。
この被膜には、BN粒子による潤滑に加えて
適度の面粗さによる油の保持性も優れていたた
めと考える。
２ タイプ１及びタイプ２が高荷重でNGとなつ
たのは、分散めつき被膜の面粗さが小さいこと
により油の保持性が劣るためと考えられる。
３ タイプ４、タイプ５、及びタイプ６は、逆に
分散めつき被膜の面粗さが大きく、そのため相
手材が損傷し、NGであつた。
本実験より、分散めつき厚さ：５〜25μ、凹凸
部の高低差：10〜30μが最適であると考え、更に
実験例１、実験例２より粒子径：１〜10μ分散め
つき厚さ：５〜25μ、凹凸部の高低差10〜30μの
組み合わせが最適である。A slide experiment will be conducted based on the following table and will be evaluated. In the galling evaluation section, ○ means no galling, and × means galling occurs.
Evaluation 1 The best type in the above experiments was Type 3, namely, material surface roughness: 15z, plating film thickness: 10μ, and dispersion plating film surface roughness: 13z. This is thought to be due to the fact that in addition to the lubrication provided by the BN particles, this coating also had excellent oil retention properties due to its moderate surface roughness. 2. The reason why Type 1 and Type 2 were NG under high loads is thought to be because the surface roughness of the dispersion plated film is small, resulting in poor oil retention. 3 Type 4, Type 5, and Type 6, on the other hand, had large surface roughness of the dispersion plating film, which caused damage to the mating material, and the results were NG. From this experiment, we believe that the optimum dispersion plating thickness is 5 to 25μ, and the height difference between concavo-convex portions: 10 to 30μ, and furthermore, based on Experimental Examples 1 and 2, the particle size is 1 to 10μ. : 5 to 25μ, and a combination of height difference of 10 to 30μ is optimal.
第１図は従来の摺動面の平たんな複合メツキ層
を示す断面拡大図、第２図は本発明の摺動面の凹
凸を付した素地を示す断面拡大図、第３図は本発
明の凹凸のある複合メツキ層を有する摺動面を示
す断面拡大図である。
１……素地、２……複合メツキ層、３……ボロ
ンナイトライド（BN）、４……素地凸部、５…
…素地凹部、６……複合メツキ層凸部、７……複
合メツキ層凹部、ａ……凹凸素地の凸部間隔、ｂ
……凹凸素地の凹部高さ。
Fig. 1 is an enlarged cross-sectional view showing a flat composite plating layer of a conventional sliding surface, Fig. 2 is an enlarged cross-sectional view showing a textured base material of the sliding surface of the present invention, and Fig. 3 is an enlarged cross-sectional view showing a base material with unevenness of the sliding surface of the present invention. FIG. 2 is an enlarged cross-sectional view showing a sliding surface having a composite plating layer with unevenness. 1... Base material, 2... Composite plating layer, 3... Boron nitride (BN), 4... Base material convex portion, 5...
...Substrate concavity, 6...Composite plating layer protrusion, 7...Composite plating layer concavity, a...Protrusion interval of uneven base, b
...The height of the concave part of the uneven base material.
Claims (1)
形成した素地に、粒子径１〜10μの固体潤滑剤を
含有したメツキ液を用いて複合メツキを施し、面
積50×50μ当り20〜50個の固体潤滑剤を含有し
た、厚さ５〜25μの複合メツキ被膜層を形成した
ことを特徴とする複合メツキ摺動面。 ２ 上記固体潤滑剤として共析微粒子ボロンナイ
トライドを用いることを特徴とする特許請求の範
囲第１項に記載の複合メツキ摺動面。[Claims] 1. Composite plating is applied to a base material on which uneven parts having a height difference of 10 to 30 μm are formed using a plating liquid containing a solid lubricant with a particle size of 1 to 10 μm, and an area of 50 μm is applied. A composite plating sliding surface characterized by forming a composite plating film layer having a thickness of 5 to 25μ and containing 20 to 50 solid lubricants per ×50μ. 2. The composite plated sliding surface according to claim 1, wherein eutectoid fine particle boron nitride is used as the solid lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6345979A JPS55154600A (en) | 1979-05-23 | 1979-05-23 | Sliding face of composite plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6345979A JPS55154600A (en) | 1979-05-23 | 1979-05-23 | Sliding face of composite plating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55154600A JPS55154600A (en) | 1980-12-02 |
| JPS642679B2 true JPS642679B2 (en) | 1989-01-18 |
Family
ID=13229835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6345979A Granted JPS55154600A (en) | 1979-05-23 | 1979-05-23 | Sliding face of composite plating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55154600A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0288889U (en) * | 1988-07-13 | 1990-07-13 |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59226199A (en) * | 1983-06-03 | 1984-12-19 | Suzuki Motor Co Ltd | Heat-insulating dispersion-plated film |
| JPS6115998A (en) * | 1984-06-29 | 1986-01-24 | Toshiba Corp | Sliding parts of compressor or the like |
| JPS6286198A (en) * | 1985-10-11 | 1987-04-20 | Suzuki Motor Co Ltd | Cylinder for internal combustion engine |
| JPH068863U (en) * | 1992-07-06 | 1994-02-04 | 株式会社ユニシアジェックス | Piston for internal combustion engine |
| AT408351B (en) * | 2000-05-17 | 2001-11-26 | Miba Gleitlager Ag | METHOD FOR GALVANICALLY DEPOSITING A DISPERSION LAYER ON A SURFACE OF A WORKPIECE |
| JP4304969B2 (en) * | 2002-11-29 | 2009-07-29 | 株式会社ジェイテクト | Rolling and sliding parts and roller cam followers using the same |
| JP3928799B2 (en) * | 2003-09-30 | 2007-06-13 | 名古屋市 | Dispersion plating method by electromagnetic stirring that enables control of distribution of dispersion in coating |
| JP7082337B2 (en) * | 2017-03-06 | 2022-06-08 | 帝国イオン株式会社 | Abrasion resistant film and its forming method, and wear resistant member |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5032071B2 (en) * | 1971-11-24 | 1975-10-17 |
-
1979
- 1979-05-23 JP JP6345979A patent/JPS55154600A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0288889U (en) * | 1988-07-13 | 1990-07-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55154600A (en) | 1980-12-02 |
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