JPH0231081A - piston rod - Google Patents
piston rodInfo
- Publication number
- JPH0231081A JPH0231081A JP18135388A JP18135388A JPH0231081A JP H0231081 A JPH0231081 A JP H0231081A JP 18135388 A JP18135388 A JP 18135388A JP 18135388 A JP18135388 A JP 18135388A JP H0231081 A JPH0231081 A JP H0231081A
- Authority
- JP
- Japan
- Prior art keywords
- cracks
- plating layer
- piston rod
- lubricant
- chrome plating
- 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
- 239000000314 lubricant Substances 0.000 claims abstract description 37
- 238000007747 plating Methods 0.000 claims abstract description 36
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000010687 lubricating oil Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- 230000000717 retained effect Effects 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000005470 impregnation Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052982 molybdenum disulfide Inorganic materials 0.000 abstract description 3
- 239000011162 core material Substances 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 description 13
- 239000011651 chromium Substances 0.000 description 13
- 239000006096 absorbing agent Substances 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 238000005498 polishing Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は１例えば油圧緩衝器、ガススプリング、油圧シ
リンダ、空圧シリンダ等に用いられるピストンロッドに
関し、特に外面をクロムめっき層で被覆したピストンロ
ッドに関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a piston rod used for example in hydraulic shock absorbers, gas springs, hydraulic cylinders, pneumatic cylinders, etc., and particularly relates to a piston rod whose outer surface is coated with a chromium plating layer. Regarding rods.
一般に、油圧緩衝器等のピストンロットは耐摩耗性、耐
蝕性、摺動性が必要であるため、円柱状の金属製ロフト
部材の外面に硬質クロムめっき層を形成し、仕上げ処理
として該硬質クロムめっき層にパフ研磨等を行って表面
を平坦に形成するようになっている。そして、このよう
にして形成されたピストンロットは油圧緩衝器或いはガ
ススプリングのシリンダに摺動可能に挿装され、該シリ
ンダ内に充填した潤滑油がピストンロッドに摺動性を付
与すると共に、ガススプリングにあってはシリンダ内の
気密性を保持するようになっている。Generally, piston rods such as hydraulic shock absorbers require wear resistance, corrosion resistance, and sliding properties, so a hard chrome plating layer is formed on the outer surface of the cylindrical metal loft member, and the hard chrome plating layer is formed as a finishing treatment. Puff polishing or the like is performed on the plating layer to form a flat surface. The piston rod formed in this way is slidably inserted into the cylinder of a hydraulic shock absorber or gas spring, and the lubricating oil filled in the cylinder provides sliding properties to the piston rod, and the gas The spring maintains airtightness within the cylinder.
（発明が解決しようとする課題）
ところで、一般にクロムめっき層には被覆クロム膜の残
留応力によるクラックか発生し、このクラックを介して
外気、水分が部材側に浸入して発錆な招くことが知られ
ているが、ピストンロットにあつては仕上げ処理として
硬質クロムめっき層にパフ研磨を行うため、当該クラッ
クは開口か閉塞されたいわゆる目潰し状態になっている
。(Problem to be Solved by the Invention) Generally, cracks occur in a chromium plating layer due to residual stress in the coating chromium film, and outside air and moisture can enter the member through these cracks, leading to rusting. As is known, in the case of piston rods, the hard chromium plating layer is subjected to puff polishing as a finishing treatment, so the cracks are either open or closed, so-called a closed state.
上述したパフ研磨はピストンロッドの表面を平坦にして
摺動性、液密性を向上させると共に、クラックを目潰し
状態にして外部から水分等かロッド部材側に浸入するの
を防止する効果があるか、パフ研磨によりクラックを完
全に目潰し状態にすることが難しく、外気と連通したク
ラックを介して外気によるロッド部材の腐蝕を招くとい
う欠点かある。Does the above-mentioned puff polishing have the effect of flattening the surface of the piston rod to improve sliding properties and liquid tightness, as well as closing cracks and preventing moisture from entering the rod member from the outside? However, it is difficult to completely close the cracks by puff polishing, and there is a drawback that the rod member is corroded by the outside air through the cracks that communicate with the outside air.
また、目潰し状態になった複数のクラックが互に連通し
てピストンロッド内に通気路を形成する場合があり、こ
のため特にガススプリングにあってはシリンダ内のガス
か該通気路を介１ノで外部に漏洩してしまい、シリンダ
の気密性が低下してしまうという欠点かある。In addition, multiple cracks that are closed may communicate with each other and form a ventilation passage within the piston rod. For this reason, especially in gas springs, the gas in the cylinder may pass through the ventilation passage. The disadvantage is that it leaks to the outside, reducing the airtightness of the cylinder.
上述したクロムめっき層に発生するクラックに対する対
策としては、例えば特開昭６０−３３３６９号公報に示
すように、クラックに防蝕組成物を浸透させて固化する
方法が知られているか、防蝕効果を目的としたもので摺
動性を考慮したものではなく、また、防蝕組成物を固化
させる工程、固化した防蝕組成物を剥離する工程等が必
要であるため、コストが嵩むという問題点がある。As a countermeasure against the above-mentioned cracks that occur in the chromium plating layer, there is a known method of infiltrating and solidifying an anticorrosion composition into the cracks, as shown in Japanese Patent Laid-Open No. 60-33369, for example, or a method of infiltrating the cracks with an anticorrosive composition and solidifying it. This method does not take sliding properties into consideration, and it also requires steps such as solidifying the anticorrosion composition and peeling off the solidified anticorrosion composition, resulting in an increase in cost.
本発明は上述した従来技術の欠点、問題点に鑑みなされ
たもので、摺動性、耐蝕性、気密性に優れており、しか
も低コストで製造できるピストンロットを提供すること
を目的とする。The present invention was made in view of the drawbacks and problems of the prior art described above, and an object of the present invention is to provide a piston rod that has excellent slidability, corrosion resistance, and airtightness, and can be manufactured at low cost.
上述した課題を解決するために構成された本発明の手段
の特徴は、ロッド部材の表面を被覆するクロムめっき層
に発生するクラック内に潤滑剤を含浸させた後、該クラ
ックを目潰し状態にして該クラック内に該潤滑剤を保持
させたことにある。The feature of the means of the present invention configured to solve the above-mentioned problems is that after impregnating a lubricant into the cracks that occur in the chromium plating layer covering the surface of the rod member, the cracks are closed. The reason is that the lubricant is retained within the crack.
硬質クロムめっき層のクラック内に含浸させである潤滑
剤によってピストンロッドは円滑に摺動でき、しかもこ
の潤滑剤はクラックを介してロッド部材側に外気、水分
か浸入するのを防Ｉトする。The lubricant impregnated into the cracks in the hard chrome plating layer allows the piston rod to slide smoothly, and this lubricant prevents outside air and moisture from entering the rod member through the cracks.
以下、本発明の実施例を図面に基づき詳述する。 Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
第１図において、ｌは例えば油圧緩衝器のシリンダ（よ
り正確にはシリンダのロッドガイド）で、該シリンダ１
の内周面ＩＡには潤滑油２が膜状に被着している。３は
前記潤滑油２を介してシリンダｌ内に摺動可能に挿嵌さ
れたピストンロット、４は該ピストンロッド３を構成す
るロッド部材で、該ロッド部材４は金属材料によつて中
実円柱状に形成されている。５は前記ロッド部材４の外
周面に被覆形成され、前記シリンダｌの内周面ＩＡに摺
接する硬質クロムめっき層で、該硬質クロムめっき層５
には形状、深さ等の異る複数のクラック６．６．−・・
が発生している（第２図参照）。In FIG. 1, l is, for example, a cylinder of a hydraulic shock absorber (more precisely, a rod guide of the cylinder), and the cylinder 1
A film of lubricating oil 2 is adhered to the inner circumferential surface IA of. 3 is a piston rod slidably inserted into the cylinder l via the lubricating oil 2; 4 is a rod member constituting the piston rod 3; It is formed into a column. Reference numeral 5 denotes a hard chromium plating layer which is coated on the outer circumferential surface of the rod member 4 and is in sliding contact with the inner circumferential surface IA of the cylinder l;
There are multiple cracks with different shapes, depths, etc. 6.6. −・・
is occurring (see Figure 2).
第３図において、７，７．−・・は前記各クラック６内
に例えば加圧含浸法、減圧含浸法等を用いて含浸させた
潤滑剤て、該潤滑剤７には本来の潤滑油のみからなる液
状潤滑剤や、潤滑油に例えば二硫化モリブデン、ボロン
ナイトライド等の粒径が ０．２ｇｍ以下の微粉状固体
潤滑剤を１〜３重量％混合して潤滑性を向上させた混合
潤滑剤かある。そして、硬質クロムめっき層５の表面に
バフ研磨、砥石研削等の仕上げ処理を行うことによって
、各クラック６は開口が閉塞した目潰し状態になり、潤
滑剤７は各クラック６内に保持された状態になっている
（第４図参照）。In FIG. 3, 7, 7. -... is a lubricant impregnated into each crack 6 using, for example, a pressure impregnation method, a reduced pressure impregnation method, etc. The lubricant 7 may include a liquid lubricant consisting only of the original lubricant, or a lubricant containing only the original lubricant. For example, there are mixed lubricants that have improved lubricity by mixing 1 to 3% by weight of fine powder solid lubricants such as molybdenum disulfide and boron nitride with a particle size of 0.2 gm or less. Then, by performing finishing treatments such as buffing and grinding on the surface of the hard chrome plating layer 5, each crack 6 becomes a closed state with its opening closed, and the lubricant 7 is retained within each crack 6. (See Figure 4).
実施例のピストンロッド３は上述の構成からなるが、次
にその製造方法について説明する。まず、ピストンロッ
ド３の芯材となるロッド部材４を成形し、該ロッド部材
４の外周面にクロムめっき処理を行う（めっき工程）。The piston rod 3 of the embodiment has the above-mentioned configuration, and the manufacturing method thereof will be explained next. First, the rod member 4 that becomes the core material of the piston rod 3 is molded, and the outer peripheral surface of the rod member 4 is subjected to chrome plating treatment (plating process).
クロムめっき処理はめっき液にクロム酸と硫酸を用い、
陽極に鉛を用いた公知の硬質クロムめっき法によって行
い、ロット部材４の表面に約１５ ｇｍの膜厚の硬質ク
ロムめっき層５を形成する。この時、該硬質クロムめっ
き層５には被覆クロム膜の残留応力等による多数のクラ
ック６．６．−・・が発生している（第２図参照）。Chrome plating treatment uses chromic acid and sulfuric acid in the plating solution.
A hard chromium plating layer 5 with a thickness of about 15 gm is formed on the surface of the rod member 4 by a known hard chromium plating method using lead as an anode. At this time, the hard chromium plating layer 5 has many cracks 6.6 due to residual stress in the coating chromium film. -... has occurred (see Figure 2).
次に、潤滑油に例えば二硫化モリブデンを１重量％混合
して潤滑剤７を作成し、この潤滑剤７を各クラック６内
に例えば減圧含浸法により含浸させる。即ち、潤滑剤７
を収容した密閉容器内に硬質クロムめっき層５を形成し
たロッド部材４を浸漬し、該密閉容器内の真空引きを行
う。この真空引きによって、クラック６．６．・・・内
の空気が容器外部に吸引排出され、潤滑剤７が各クラッ
ク６内に含浸される（潤滑剤含浸工程）。Next, a lubricant 7 is prepared by mixing, for example, 1% by weight of molybdenum disulfide with the lubricating oil, and this lubricant 7 is impregnated into each crack 6 by, for example, a reduced pressure impregnation method. That is, lubricant 7
The rod member 4 on which the hard chromium plating layer 5 is formed is immersed in a closed container containing the inside of the closed container, and the inside of the closed container is evacuated. This vacuuming causes cracks 6.6. ...The air inside is sucked and discharged to the outside of the container, and the lubricant 7 is impregnated into each crack 6 (lubricant impregnation step).
最後に、硬質クロムめっき層５の表面に例えばパフ研磨
を行い、該めっき層５の表面を平滑に仕上げると共に、
各クラック６の開口を閉塞して目潰し状態にする（目潰
し工程）。かくして、めっき工程、潤滑剤含浸工程、目
潰し工程によって、各クラック６内か潤滑剤７によって
外気と完全に遮断されたピストンロッドを簡単に、かつ
低コストで製造することかできる。Finally, the surface of the hard chrome plating layer 5 is subjected to, for example, puff polishing to make the surface of the plating layer 5 smooth, and
The opening of each crack 6 is closed to be closed (closing step). Thus, by the plating process, the lubricant impregnation process, and the blinding process, a piston rod in which the inside of each crack 6 is completely isolated from the outside air by the lubricant 7 can be manufactured simply and at low cost.
実施例によるピストンロッド３は上述の如くであって、
従来技術によるピストンロットと同様に油圧緩衝器のシ
リンダｌに潤滑油２を介して挿嵌され、シリンダｌに対
して摺動する。而して、実施例のピストンロッド３のう
ちシリンダｌの内周面ＩＡに対して摺動を繰返す摺動面
部についてみれば、硬質クロムめっき層５が次第に摩耗
するとｌ］漬し状態にあったクラック６か開口し、潤滑
剤７か硬質クロムめっき層５表面に露出してシリンダｌ
内周面ＩＡと摺接することになる。この場合、各クラッ
ク６内には毛管作用によつて潤滑剤７か保持された状態
にあり、潤滑剤７はクラック協
６外に流出することなく潤滑油２と１働してピストンロ
ット３の円滑な摺動性を維持する。また、潤滑剤７は各
クラック６内に含浸した状態になっているから、外気、
水分等が該クラック６を介してロッド部材４にまで浸透
して腐蝕させるのを防止できる。The piston rod 3 according to the embodiment is as described above,
Like the piston rod according to the prior art, it is inserted into the cylinder l of the hydraulic shock absorber via lubricating oil 2, and slides with respect to the cylinder l. Looking at the sliding surface portion of the piston rod 3 of the embodiment that repeatedly slides against the inner circumferential surface IA of the cylinder 1, it was found that when the hard chrome plating layer 5 gradually wore out, it was in a soaked state. Crack 6 opens and lubricant 7 or hard chrome plating layer 5 surface is exposed and cylinder l
It comes into sliding contact with the inner circumferential surface IA. In this case, the lubricant 7 is retained in each crack 6 by capillary action, and the lubricant 7 works together with the lubricant 2 to prevent the piston rod 3 from flowing out of the crack 6. Maintain smooth sliding properties. In addition, since the lubricant 7 is impregnated into each crack 6, the outside air
It is possible to prevent moisture and the like from penetrating into the rod member 4 through the cracks 6 and corroding it.
一方、ピストンロッド３のうちシリンダ１と摺動しない
軸端側の非摺動面部については、目潰し状態にある各ク
ラック６内に潤滑剤７が保持されており、クラック６を
介して外気、水分かロッド部材４にまで侵入するのを確
実に防止できるから、ピストンロッド３が腐食環境に晒
されても、ロッド部材４が発錆することかない、また、
クラック６を目潰し状態にすることによって、クラック
６内に含浸した潤滑剤７の油分か揮発するのを抑制でき
るから、ピストンロッド３のストローク量が大きく変化
して軸端側までシリンダｌと摺接する場合か生じても円
滑に摺動することかできる。On the other hand, regarding the non-sliding surface portion of the piston rod 3 on the shaft end side that does not slide with the cylinder 1, a lubricant 7 is held in each crack 6 which is in a closed state, and outside air and moisture Since the piston rod 3 can be reliably prevented from penetrating into the rod member 4, the rod member 4 will not rust even if the piston rod 3 is exposed to a corrosive environment.
By closing the crack 6, it is possible to suppress the oil content of the lubricant 7 impregnated in the crack 6 from volatilizing, so that the stroke amount of the piston rod 3 changes greatly and slides into contact with the cylinder 1 up to the shaft end side. Even if a problem occurs, it can slide smoothly.
なお、実施例は潤滑剤７として潤滑油と固体潤滑剤の混
合物を例に挙げたが、従来の潤滑油だけを潤滑剤として
用いてもよい。In the embodiment, a mixture of a lubricating oil and a solid lubricant is used as the lubricant 7, but only a conventional lubricating oil may be used as the lubricant.
また、実施例は油圧緩衝器用ピストンロッド３を例に挙
げたが、例えばガススプリング用ピストンロット等にも
本発明は適用できる。この場合、硬質クロムめっき層の
クラック内には潤滑剤か含浸されており、その表面張力
によって気密性が保持されているから、従来技術のよう
に、目潰し状態のクラックが連通して通気路を形成し、
シリンダ内のガスを漏洩させるとい、う問題を解消でき
る。In addition, although the piston rod 3 for a hydraulic shock absorber has been exemplified in the embodiment, the present invention can also be applied to, for example, a piston rod for a gas spring. In this case, the cracks in the hard chrome plating layer are impregnated with lubricant, and their surface tension maintains airtightness, so unlike the conventional technology, the cracks in the closed state connect and open the air passage. form,
This eliminates the problem of gas leaking inside the cylinder.
本発明は以上詳述した如くであって、クロムめっき層の
クラックに予め潤滑剤を含浸せしめた後、該クラックを
目潰し状態にする構成を採用しだから、潤滑性、耐食性
、気密性に優れたピストンロッドを低コストで提供でき
る。The present invention has been described in detail above, and employs a structure in which the cracks in the chrome plating layer are impregnated with a lubricant in advance, and then the cracks are closed, resulting in excellent lubricity, corrosion resistance, and airtightness. Piston rods can be provided at low cost.
第１図は本発明の実施例に係るピストンロッドな油圧緩
衝器のシリンダに挿装した状態で示す要部断面図、第２
図ないし第４図は実施例に係るピストンロッドの製造段
階を示し、第２図はロッド部材に硬質クロムめっき層を
被覆した状態を示す断面図、第３図は硬質クロムめっき
層のクラックに潤滑剤を含浸させた状態を示す断面図、
第４図は硬質クロムめっき層にパフ研磨を行ってクラッ
クを目潰し状態にした断面図である。
ｌ・・・シリンダ、２・・・潤滑油、３・・・ピストン
ロット、４・・・ロッド部材、５・・・硬質クロムめっ
き層、６・・・クラック、７・・・潤滑剤。FIG. 1 is a sectional view of a main part of a hydraulic shock absorber, which is a piston rod according to an embodiment of the present invention, shown in a state where it is inserted into a cylinder;
Figures 4 to 4 show the manufacturing steps of the piston rod according to the example, Figure 2 is a cross-sectional view showing the state in which the rod member is coated with a hard chrome plating layer, and Figure 3 is a lubrication for cracks in the hard chrome plating layer. A cross-sectional view showing a state impregnated with the agent,
FIG. 4 is a cross-sectional view of the hard chromium plating layer subjected to puff polishing to close up cracks. l...Cylinder, 2...Lubricating oil, 3...Piston rod, 4...Rod member, 5...Hard chrome plating layer, 6...Crack, 7...Lubricant.
Claims (1)
っき層とからなり、潤滑油を介して相手方部材に摺動可
能に挿装されるピストンロッドにおいて、前記クロムめ
っき層に発生するクラック内に潤滑剤を含浸させた後、
該クラックを目潰し状態にして該クラック内に該潤滑剤
を保持させる構成としたことを特徴とするピストンロッ
ド。In a piston rod that is composed of a rod member and a chrome plating layer covering the surface of the rod member and is slidably inserted into a mating member via lubricating oil, lubrication is applied to cracks that occur in the chrome plating layer. After impregnating with the agent,
A piston rod characterized in that the crack is closed and the lubricant is retained within the crack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18135388A JPH0231081A (en) | 1988-07-20 | 1988-07-20 | piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18135388A JPH0231081A (en) | 1988-07-20 | 1988-07-20 | piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0231081A true JPH0231081A (en) | 1990-02-01 |
Family
ID=16099229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18135388A Pending JPH0231081A (en) | 1988-07-20 | 1988-07-20 | piston rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0231081A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0442961U (en) * | 1990-08-08 | 1992-04-13 | ||
| CN111843371A (en) * | 2020-06-23 | 2020-10-30 | 苏州优霹耐磨复合材料有限公司 | Low-friction-coefficient surfacing composite wear-resisting plate and manufacturing process thereof |
-
1988
- 1988-07-20 JP JP18135388A patent/JPH0231081A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0442961U (en) * | 1990-08-08 | 1992-04-13 | ||
| CN111843371A (en) * | 2020-06-23 | 2020-10-30 | 苏州优霹耐磨复合材料有限公司 | Low-friction-coefficient surfacing composite wear-resisting plate and manufacturing process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69407591T2 (en) | SOLID LUBRICANT AND COATING SYSTEM FROM TURNABLE STEEL | |
| AU2009202212B2 (en) | A method of surface treating a mechanical part made of high-strength steel, and a sealing system obtained by implementing said method | |
| KR910001825B1 (en) | Bearing material having multiple layer therein & a method of manufacturing the same | |
| JP2016518568A (en) | Sliding engine parts | |
| CA3126046C (en) | Threaded connection for pipes | |
| JP3809082B2 (en) | Surface treatment method for mechanical parts subject to wear and corrosion | |
| CA2288766A1 (en) | Wrapped slide bearing bush | |
| EP0053521B1 (en) | Improvements in metal components | |
| KR0138683B1 (en) | Piston and its production method in the internal combustion engines | |
| EP3531001A1 (en) | Threaded joint for pipe and method for manufacturing threaded joint for pipe | |
| JPH0231081A (en) | piston rod | |
| US2893793A (en) | Oil-impregnated bearing having molybdenum sulfide coating and method of making same | |
| DE112007000885T5 (en) | Sliding material and sliding element using this sliding material | |
| US20040013328A1 (en) | Sintered bearing and production method therefor | |
| US3900200A (en) | Scuff resistant sliding member | |
| EP4130444B1 (en) | Sintered alloy valve guide, and method for manufacturing sintered alloy valve guide | |
| WO2010044216A1 (en) | Sliding member and method for manufacturing the same | |
| DE3917951A1 (en) | Nitrided piston ring | |
| JP2804555B2 (en) | Sliding valve and method for processing its sliding surface | |
| DE102015014192A1 (en) | functional layer | |
| DE10323953A1 (en) | Method for constructing drive system for vehicle clutch master cylinder using a lacquer coating on the sliding surfaces for a secure seal and to cover any surface irregularities produced by pressing | |
| JPH11270677A (en) | Cylinder device and method of manufacturing piston rod used therein | |
| US12553117B2 (en) | Method for manufacturing a part comprising a metal substrate covered with a protective layer and a part manufactured according to this method | |
| JPH03247777A (en) | Rust preventing treatment for sliding member | |
| CN104040225A (en) | Piston rings with wear-resistant cobalt coating |