JPH03125076A - Coating method for piston ring - Google Patents
Coating method for piston ringInfo
- Publication number
- JPH03125076A JPH03125076A JP26227389A JP26227389A JPH03125076A JP H03125076 A JPH03125076 A JP H03125076A JP 26227389 A JP26227389 A JP 26227389A JP 26227389 A JP26227389 A JP 26227389A JP H03125076 A JPH03125076 A JP H03125076A
- Authority
- JP
- Japan
- Prior art keywords
- piston ring
- wear
- coated
- powder
- resistant material
- 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
- 238000000576 coating method Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000011247 coating layer Substances 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000003566 sealing material Substances 0.000 description 5
- 229910003470 tongbaite Inorganic materials 0.000 description 5
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007751 thermal spraying Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten 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、往復動内燃機関のピストンに嵌装するピスト
ンリングに関するもので、耐摩耗性が要求されるその他
の摺動部品にも適用することができる。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a piston ring fitted to a piston of a reciprocating internal combustion engine, and is also applicable to other sliding parts that require wear resistance. be able to.
ピストンリングの耐摩耗性向上策の一つとして、従来の
鋳鉄製ピストンリングの摺動面に耐摩耗材を溶射コーテ
ィングしたピストンリングが実用されているが、溶射層
の厚さを０．５ ｔｒａｍ以上にすると耐摩耗材が剥離
し、却って摩耗を促進するというへい害がある。As one measure to improve the wear resistance of piston rings, piston rings in which the sliding surfaces of conventional cast iron piston rings are thermally sprayed with a wear-resistant material have been put into practical use. If this is done, the wear-resistant material will peel off, which may actually accelerate wear.
したがって耐摩耗材の厚さを少な（とも２ｆｆｉｌｌ＋
以上にし、かつ剥離が生じないピストンリングの製作技
術の開発が望まれている。Therefore, the thickness of the wear-resistant material should be reduced (both 2ffill+
It is desired to develop a manufacturing technique for piston rings that achieves the above and does not cause peeling.
前述のように従来技術によるピストンリングの溶射コー
ティングは、コーティング厚さを厚（すると剥離を生じ
やすい問題点があり、溶射コーティングのみでは、コー
ティング厚さは約０．５ ｒｕｍ以上は無理とされてい
る。As mentioned above, the prior art thermal spray coating for piston rings has the problem of increasing the coating thickness (thickness), which tends to cause peeling, and it is said that it is impossible to achieve a coating thickness of approximately 0.5 rum or more with thermal spray coating alone. There is.
また、通常のＨＩ Ｐ （Ｈｏｔ ｌ５ｏｓｔａｔｉｃ
Ｐｒｅｓｓ ）技術を用いれば、部材の表面に、硬い
耐摩耗材を厚く張り合せることは可能である。しかし、
この技術は、一般に容器を用い、その中に被処理部材と
耐摩耗材の粉末を充填し、真空シールを行い、容器ごと
ＨＩＰ処理を行う方法である。In addition, normal HIP (Hot l5ostatic
Press) technology makes it possible to apply a thick layer of hard, wear-resistant material to the surface of a component. but,
This technique generally uses a container, fills the container with a member to be processed and powder of a wear-resistant material, performs vacuum sealing, and performs HIP processing on the entire container.
従って、ＨＩＰ技術によると、容器の製作費および多量
の耐摩耗材粉末を必要とし、更に余分な１）６分の削除
に多くの工数がかかることなど、製作工程が複雑で加工
工数が増大する等の問題点がある。Therefore, according to the HIP technology, the manufacturing process is complicated and the number of processing steps increases, such as requiring the manufacturing cost of the container and a large amount of wear-resistant material powder, and also requiring a large number of man-hours to remove the extra 1) 6 minutes. There is a problem with this.
本発明は、上述のような従来技術による問題点を排除し
、厚（且つ剥離しない耐摩耗材コーティング層を具えた
ピストンリングを比較的簡単で且つ少ない工程で製造す
ることを目的とするものである。The present invention aims to eliminate the problems caused by the prior art as described above, and to manufacture a piston ring having a thick (and non-peeling) wear-resistant coating layer in a relatively simple and small number of steps. .
まず、耐摩耗材をピストンリング本体に厚く（数ミリメ
ートル）コーティングし、その施工中に剥離を生じない
ようにするため、ピストンリングの外周面に溝を加工し
、該溝の深さは、耐摩耗材の必要な厚さとする。First, a wear-resistant material is coated thickly (several millimeters) on the piston ring body, and in order to prevent peeling during coating, a groove is machined on the outer circumferential surface of the piston ring. be the required thickness.
上記溝に、耐摩耗材を溶射により、溝の深さよりや〜厚
くコーティングする。さらにその上に封孔性のよい粉末
材を溶射コーティングし、先に；−テイングした耐摩耗
材を覆う。これは耐摩耗材を溶射コーティングしたまま
の状態でＨＩＰ処理を行っても、溶射層が多孔質のため
、溶射層自体に外圧が十分負荷されず、溶射層の焼結と
接合が不十分となるからである。The grooves are coated with a wear-resistant material that is slightly thicker than the depth of the grooves by thermal spraying. Furthermore, a powder material with good pore-sealing properties is thermally sprayed on top of it to cover the wear-resistant material that has been previously coated. This is because even if the HIP treatment is performed with the wear-resistant material spray-coated, the sprayed layer is porous, so the external pressure is not sufficiently applied to the sprayed layer itself, resulting in insufficient sintering and bonding of the sprayed layer. It is from.
封孔性の良い粉末材としては、Ｎ１粉末、ガラス粉末な
どを用いる。このように、封孔処理をしたリングなＨＩ
Ｐ装置にて、高温高圧（等方圧）下で処理する。これに
よって、耐摩耗材は溶射のままの状態より、焼結によっ
て緻密化すると共にリング本体材と強固に接合し、従来
の技術的課題を解決することができる。その後は封孔材
を除去し、通常のピストンリングの製作工程を実施する
だけで良い。As the powder material with good sealing properties, N1 powder, glass powder, etc. are used. In this way, a sealed ring HI
Process under high temperature and high pressure (isotropic pressure) using P apparatus. As a result, the wear-resistant material is sintered to become denser than the thermally sprayed state, and is firmly bonded to the ring body material, thereby solving the conventional technical problems. After that, all you need to do is remove the sealing material and carry out the normal piston ring manufacturing process.
す／グ本体に溝を加工することによって、耐摩耗材の溶
射コーティング厚さの目安とすることができると共に、
溶射層の両端がリング本体材で構成されているため溶射
層を固縛し、剥離に対して有効に作用する。By machining grooves on the main body of the gas/glue, it is possible to use it as a guide for the thickness of the thermal spray coating of the wear-resistant material.
Since both ends of the sprayed layer are made of ring body material, the sprayed layer is secured and effectively prevents peeling.
耐摩耗材の溶射層の上に封孔性の良い粉末を溶射コーテ
ィングすることによって、ＨＩＰ処理におゆる高圧（等
方圧）を溶射層に外部から負荷できるため、焼結と接合
が十分に行える。By thermally spraying a powder with good pore-sealing properties on the thermally sprayed layer of wear-resistant material, the high pressure (isotropic pressure) used in HIP treatment can be applied externally to the thermally sprayed layer, allowing for sufficient sintering and bonding. .
ＨＩＰ装置の容積に応じて、個々のリングを積重ねて同
時に処理できるため、生産性が高く、低コストとなる。Depending on the volume of the HIP device, individual rings can be stacked and processed simultaneously, resulting in high productivity and low cost.
封孔処理層（溶射層）を除去すれば、従来のピストンリ
ング製造工程が実施できるので、工程の多様性が少なく
、従来の加工技術と設備がそのまま使える。If the sealing layer (sprayed layer) is removed, the conventional piston ring manufacturing process can be carried out, so there is less variety in the process, and conventional processing techniques and equipment can be used as is.
＄Ｊ１図乃至第６図において、１はピストンリング、ｌ
ａはピストンリング本体、１ｂは耐摩耗材、ＩＣは封孔
材、１ｄは合ひ口、２は溶射装置である。In Figures $J1 to 6, 1 is a piston ring, l
a is a piston ring body, 1b is a wear-resistant material, IC is a sealing material, 1d is a joint, and 2 is a thermal spraying device.
ピストンリング１は、一般に第２図に示すような形状を
有し、連続したリングではなく、合ひ口１ｄと呼ばれる
ところで切断されている。The piston ring 1 generally has a shape as shown in FIG. 2, and is not a continuous ring, but is cut at a place called a joint 1d.
ピストンリング本体１ａの材料としては従来の鋳鉄材又
は炭素鋼あるいは合金鋼などが用いられる。従来から鋳
鉄材を用いている理由は、鋳鉄中のグラファイトで摺動
性を確保するためであったが、本発明のよう建、摺動面
を別の耐摩耗材で構成させる場合には、リング本体材は
、鋳鉄よりもむしろ靭性、剛性の高い炭素鋼や合金鋼の
使用が望ましい。耐摩耗材１ｂは、リング本＄１ａに金
属接合され、その幅は摺動面の全幅より、や〜狭く、厚
さは少なくとも１ｒＩｒ！Ｒ以上から３〜４８程度が理
想的である。Conventional cast iron, carbon steel, alloy steel, or the like is used as the material for the piston ring body 1a. Conventionally, cast iron has been used to ensure sliding properties due to the graphite in the cast iron, but when the building and sliding surfaces are made of another wear-resistant material as in the present invention, the ring For the body material, it is preferable to use carbon steel or alloy steel, which has high toughness and rigidity, rather than cast iron. The wear-resistant material 1b is metallized to the ring book $1a, and its width is slightly narrower than the entire width of the sliding surface, and its thickness is at least 1rIr! Ideally, it should be R or higher and about 3 to 48.
耐摩耗材１ｂは、タングステン力−ノ２イｒＷＯ。The wear-resistant material 1b is made of tungsten.
クロム炭化物Ｃｒ５Ｕ２をはじめ、鉄とモリブデンＭ。Including chromium carbide Cr5U2, iron and molybdenum M.
の混合粉末やステライト、ならびにこれらの混合粉末な
どが用いられる。耐摩耗性および摺動性の両面から見れ
ば、クロム炭化物Ｃｒ３Ｃ２が最も優れているようであ
る。ただし、クロム炭化物だけでは焼結性や接合性が劣
るため、クロム炭化物の粉末に、数チのＮ１やＧｏを混
合して用いることが多い。Mixed powders, stellite, and mixed powders thereof are used. From the standpoint of both wear resistance and sliding properties, chromium carbide Cr3C2 appears to be the most excellent. However, since chromium carbide alone has poor sinterability and bonding properties, it is often used by mixing several trebles of N1 or Go with chromium carbide powder.
第３図乃至第６図は１本発明の製作工程を図示したもの
である。第３図は、リング本体１ａの外周に溝を加工し
、この溝へ溶射装置２を用いて耐摩耗材１ｂの粉末をコ
ーティングしている状況を示す。耐摩耗材１ｂのコーテ
ィングが完了したら、封孔材ＩＣの溶射コーティングを
実施する。この段階までの構成要素を第４図に示す。耐
摩耗材１ｂを覆っているＩＣが封孔材である。次いで第
５図および第６図はＨＩＰ処理の状況を示す。第５図は
全体の概念図、第６図はコーティング済みピストンリン
グに負荷されるＨＩＰの状況を示したもので、耐摩耗材
１ｂは封孔材ＩＣを介して外部から高圧力（８方圧）を
負荷され、高温に加熱されて焼結とリング本体１ａへの
接合が同時に行われる。ＨＩＰ処理後は封孔材ＩＣを除
去し、従来のピストンリングの製作工程を経て、第１図
、第２図に示したピストンリングが完成する。FIGS. 3 to 6 illustrate the manufacturing process of the present invention. FIG. 3 shows a situation in which a groove is formed on the outer periphery of the ring body 1a, and the groove is coated with powder of the wear-resistant material 1b using the thermal spraying device 2. After the coating of the wear-resistant material 1b is completed, thermal spray coating of the pore sealing material IC is carried out. The components up to this stage are shown in FIG. The IC covering the wear-resistant material 1b is a sealing material. Next, FIGS. 5 and 6 show the status of HIP processing. Figure 5 is an overall conceptual diagram, and Figure 6 shows the state of HIP applied to a coated piston ring. is loaded and heated to a high temperature to simultaneously perform sintering and bonding to the ring body 1a. After the HIP treatment, the sealing material IC is removed and the piston ring shown in FIGS. 1 and 2 is completed through the conventional piston ring manufacturing process.
このようにして製造された本発明によるピストンリング
と従来の鋳鉄製ピストンリングとを摩耗量／使用時間に
ついて比較したものが第７図のグラフである。The graph in FIG. 7 compares the amount of wear/use time between the piston ring according to the present invention manufactured in this manner and a conventional piston ring made of cast iron.
本発明によるピストンリングのコーティング方法は、ピ
ストンリング本体の摺動面全周に、摺動幅より小さい幅
の溝を加工し、上記溝に耐摩耗性を有する粉末を溶射コ
ーティングして溝を埋め、上記コーティング層の上に、
さらに封孔性の良い粉末材を溶射コーティングし、この
コーティング済みピストンリングをＨＩＰ処理して耐摩
耗材をピストンリング本体に焼結接合することにより、
次の効果を有する。The piston ring coating method according to the present invention involves forming a groove with a width smaller than the sliding width on the entire circumference of the sliding surface of the piston ring body, and then thermally spraying the groove with a wear-resistant powder to fill the groove. , on top of the above coating layer,
Furthermore, by thermal spray coating a powder material with good sealing properties, and applying HIP treatment to this coated piston ring, the wear-resistant material is sintered and bonded to the piston ring body.
It has the following effects.
（１） ピストンリングの摺動面に、ピストンリング
本体材料とは別の耐摩耗性および摺動性の優れた材料を
強固にコーティングできる。(1) The sliding surface of the piston ring can be strongly coated with a material that is different from the piston ring main body material and has excellent wear resistance and sliding properties.
（２） コーティング厚を数喘（従来は０．５鰭以下
）とし、且つ緻密で剥離を生じないコーティングが得ら
れる。(2) The coating thickness can be reduced to several fins (previously 0.5 fins or less), and a dense coating that does not peel off can be obtained.
（３）上記（１） 、 ＋２１項の結果、耐久性のある
ピストンリングが得られる。（従来の鋳鉄リングの約１
０倍、タングステンカーバイドを０．５■厚さにコーテ
ィングした溶射リングと較べても６〜８倍の耐久性があ
る）
（４）かなり広い範囲で耐摩耗粉末材の選定が可能であ
り、１種類の粉末だけでなく、複数の種類の粉末を混合
して使用できるなど、耐摩耗性と摺動性を任意に、細か
く調整することも可能である。(3) As a result of the above items (1) and +21, a durable piston ring can be obtained. (Approximately 1
(4) It is possible to select wear-resistant powder materials from a fairly wide range, and 1. It is also possible to finely adjust the wear resistance and sliding properties as desired, such as by being able to use not only different types of powder but also a mixture of multiple types of powder.
第１図（ａ）は本発明を実施したピストンリング中央の
断面図、第１図（１，）は第１図（ａ）のＡ部拡大断面
図、第２図（ａ）は一般的なピストンリングの平面図、
第２図（ｂ）は第２図（ａ）の合ひ口の側から見た側面
図、第３図は本発明による溶射コーティング状況を示す
概念図、第４図はコーティング済みピストンリングの断
面図、第５図は）（ＩＰ処理の全体概念図、第６図はＨ
ＩＰ処理済みピストンリングの断面図、第７図は本発明
を実施したピストンリングと従来のピストンリングの耐
久性を比較したグラフである。
１・・・ピスト／リング。
１ａ・・・ピストンリング本体、１ｂ・・・耐摩耗材。Fig. 1(a) is a sectional view of the center of a piston ring in which the present invention is implemented, Fig. 1(1,) is an enlarged sectional view of section A in Fig. 1(a), and Fig. 2(a) is a general sectional view of the piston ring. Top view of piston ring,
Fig. 2(b) is a side view of Fig. 2(a) as seen from the joint port side, Fig. 3 is a conceptual diagram showing the state of thermal spray coating according to the present invention, and Fig. 4 is a cross section of the coated piston ring. (Fig. 5 is) (Overall conceptual diagram of IP processing, Fig. 6 is H
FIG. 7, which is a cross-sectional view of an IP-treated piston ring, is a graph comparing the durability of a piston ring according to the present invention and a conventional piston ring. 1... Piste/Ring. 1a... Piston ring body, 1b... Wear-resistant material.
Claims (1)
幅の溝を加工し、上記溝に耐摩耗性を有する粉末を溶射
コーティングして溝を埋め、上記コーティング層の上に
、さらに封孔性の良い粉末材を溶射コーテイングし、こ
のコーティング済みピストンリングをＨＩＰ処理して耐
摩耗材をピストンリング本体に焼結接合することを特徴
とするピストンリングのコーテイング方法。A groove with a width smaller than the sliding width is machined on the entire circumference of the sliding surface of the piston ring body, the groove is filled with a thermal spray coating of wear-resistant powder, and a seal is further applied on top of the coating layer. A method for coating a piston ring, which comprises thermal spray coating a powder material with good porosity, subjecting the coated piston ring to HIP treatment, and sintering and joining a wear-resistant material to a piston ring body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26227389A JPH03125076A (en) | 1989-10-09 | 1989-10-09 | Coating method for piston ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26227389A JPH03125076A (en) | 1989-10-09 | 1989-10-09 | Coating method for piston ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03125076A true JPH03125076A (en) | 1991-05-28 |
Family
ID=17373505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26227389A Pending JPH03125076A (en) | 1989-10-09 | 1989-10-09 | Coating method for piston ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03125076A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2236229A1 (en) | 2009-04-02 | 2010-10-06 | Sandvik Intellectual Property AB | Method for manufacturing a powder based article |
-
1989
- 1989-10-09 JP JP26227389A patent/JPH03125076A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2236229A1 (en) | 2009-04-02 | 2010-10-06 | Sandvik Intellectual Property AB | Method for manufacturing a powder based article |
| US9205492B2 (en) | 2009-04-02 | 2015-12-08 | Sandvik Intellectual Property Ab | Method for manufacturing a powder based article |
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