JPS6043107A - Control valve member for use in internal-combustion engine - Google Patents
Control valve member for use in internal-combustion engineInfo
- Publication number
- JPS6043107A JPS6043107A JP15054283A JP15054283A JPS6043107A JP S6043107 A JPS6043107 A JP S6043107A JP 15054283 A JP15054283 A JP 15054283A JP 15054283 A JP15054283 A JP 15054283A JP S6043107 A JPS6043107 A JP S6043107A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- less
- nitrided
- pad
- sintered
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
Abstract
Description
【発明の詳細な説明】
本発明は、内慾機関の動弁装置を構成するロッカアーム
やタペット等のカムフォロワとして用いる動弁部材に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve operating member used as a cam follower of a rocker arm, tappet, or the like constituting a valve operating device of an internal aspiration engine.
一般に、ロッカアームやタペット等のカムの従動部材と
して機能する動弁部材の摺動部には、チルド処理が施さ
れた鋳物や、鉄系焼結材からなるパッド材が設けられて
いる。Generally, a sliding portion of a valve operating member such as a rocker arm or a tappet that functions as a driven member of a cam is provided with a pad material made of chilled casting or iron-based sintered material.
ととるで近年、内燃機関に対する高速化、高出力化、高
効率化等の要求に対応して、ターボ等の過給器を備えた
ものや、ディーゼル機関等が普及し、これに伴い前記動
弁部材のノくラド材に対する使用条件が一段と厳しさを
加えてきている。このため、上記パッド材について、そ
の特性を向上させるべく種々の研究、開発がなされ、耐
摩耗性、ピッチング性が改善された材料を得ることが可
能となったが、その反面耐スカッフィング性、初期なじ
み性、相手攻撃性に問題を残しているのが現状である。In recent years, in response to demands for higher speed, higher output, and higher efficiency for internal combustion engines, engines equipped with turbos and other superchargers, as well as diesel engines, have become popular. The usage conditions for the metal used in valve parts are becoming increasingly strict. For this reason, various research and developments have been carried out to improve the properties of the above-mentioned pad materials, and it has become possible to obtain materials with improved wear resistance and pitting resistance. The current situation is that there are still problems with familiarity and aggression towards opponents.
本発明は、上記事情に鑑みてなされたもので、優れた耐
摩耗性及びピッチング性を有し、かつ耐スカッフィック
性及び初期なじみ性を向上させ、相手攻撃性を、低下さ
せることができるノζツド材を備えた動弁部材を提供す
ることを目的とする。The present invention has been made in view of the above circumstances, and has excellent wear resistance and pitching resistance, improves scuffing resistance and initial conformability, and can reduce opponent attack. An object of the present invention is to provide a valve train member equipped with a ζ-shaped material.
本発明者等は、上記の目的を達成するため鋭意研究を重
ねた結果、パッド材としてＣ−Ｃｒ −Ｍｎ−８１−Ｐ
（Ｂ ）−（ＭＯ％ Ｗ％ Ｎｂｓ Ｔ １、’１ｒ
ｓＴ ａ％Ｖ％ Ｈｌ、Ｃ０１ＣｕＸＳｎ］−Ｆｅ合金
からなる鉄系の粉末焼結材を用い、この焼結体の摺動面
に浸炭層を形成すると共に、この浸炭層の表面に窒化層
、窒化反応層、リン酸塩皮膜等を形成することによって
良好な特性をもったパッド材が得られ、更には前記合金
の最適な組成を見い出して本発明に至ったものである。As a result of intensive research to achieve the above object, the present inventors have discovered that C-Cr-Mn-81-P can be used as a pad material.
(B) - (MO% W% Nbs T 1, '1r
Using an iron-based powder sintered material made of sT a%V% Hl, C01CuXSn]-Fe alloy, a carburized layer is formed on the sliding surface of this sintered body, and a nitrided layer is formed on the surface of this carburized layer. By forming a reaction layer, a phosphate film, etc., a pad material with good properties can be obtained, and the present invention has also been achieved by finding the optimum composition of the alloy.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明の動弁部材は、その摺動面を形成するパッド材が
、表面に浸炭層を有すると共に、この浸炭層の表面に窒
化層、窒化反応層、リン酸塩皮膜のうちの１種以上の皮
膜層を有してなることを特徴とするものである。In the valve train member of the present invention, the pad material forming the sliding surface has a carburized layer on the surface, and at least one of a nitrided layer, a nitrided reaction layer, and a phosphate film is formed on the surface of the carburized layer. It is characterized by having a coating layer of.
本発明の動弁部材は、その本体が鋼あるいは紡鉄等の材
料で形成され、カムに接する摺動部にノ（ラド材が設け
られてなる。本体を従来と同様に鋼等で形成したのは、
充分な機械的強度をもたせ、かつ慣性質量を小さく抑え
るためである。In the valve operating member of the present invention, the main body is made of a material such as steel or spun iron, and the sliding portion in contact with the cam is provided with a rad material. The thing is,
This is to provide sufficient mechanical strength and to keep the inertial mass small.
またパッド材は、鉄系の粉末焼結材料を成形、焼結して
なるもので、その摺動面には、浸炭層が形成されると共
に、この浸炭層の表面に、窒化層、窒化反応層、リン酸
塩皮膜層のうちの１種以上の皮膜層が形成されてなる。The pad material is made by molding and sintering iron-based powder sintered material, and a carburized layer is formed on the sliding surface, and a nitriding layer and a nitriding reaction are formed on the surface of this carburized layer. one or more of the following: a phosphate film layer; and a phosphate film layer.
このパッド材は、動弁部材本体に、例えば銅ロウを用い
てロウ付けするか、あるいは焼結後に拡散接合して固定
されている。This pad material is fixed to the valve operating member body, for example, by brazing with copper solder or by diffusion bonding after sintering.
前記パッド材を構成する鉄系の粉末焼結材料としては、
Ｃ−Ｃｒ−Ｍｎ−８ｉ −Ｐ （Ｂ ）−（Ｍｏ、Ｗｑ
Ｎｂｓ Ｔｔ、Ｚｒ、Ｔａ、■、Ｎ１、Ｃｏ、Ｃｕ−
Ｓｎ ）−Ｆｅ合金が好適であり、この合金として後に
詳述する組成範囲のものを用いることが、望ましい。The iron-based powder sintered material constituting the pad material includes:
C-Cr-Mn-8i-P(B)-(Mo, Wq
Nbs Tt, Zr, Ta, ■, N1, Co, Cu-
A Sn )--Fe alloy is preferred, and it is desirable to use an alloy within the composition range described in detail below.
上記パッド材の表面に形成された浸炭層は、その表面忙
更に窒、化層、窒化反応層、リン酸塩皮膜等を形成する
際のマトリックスの軟化を防ぎ、その適度な硬さを確保
する作用をする。また、浸炭層は、窒化層やリン酸塩皮
膜と焼結合金との間に介在して、前記窒化層やリン酸塩
皮膜と焼結合金との間での極端な硬さの変化を緩和する
作用をし、これにより窒化層等の焼結合金に対する結合
性を良好に保って窒化層等の剥離現象を防止すると共に
、パッド材の耐久性を向上させる作用をする。The carburized layer formed on the surface of the pad material prevents the softening of the matrix during the formation of the nitriding layer, nitriding reaction layer, phosphate film, etc. on the surface, and ensures appropriate hardness. act. In addition, the carburized layer is interposed between the nitrided layer or phosphate coating and the sintered alloy to alleviate extreme changes in hardness between the nitrided layer or phosphate coating and the sintered alloy. This has the effect of maintaining good bonding properties of the nitrided layer and the like to the sintered alloy, thereby preventing the peeling phenomenon of the nitriding layer and the like, as well as improving the durability of the pad material.
上記浸炭層は、パッド材を焼結合金により形成した後に
周知の固体浸炭、液体浸炭、気体浸炭等の処理方法を適
用して形成することができる。The carburized layer can be formed by forming the pad material from a sintered alloy and then applying a well-known treatment method such as solid carburizing, liquid carburizing, gas carburizing, or the like.
また、前記窒化層、窒化反応層、リン酸塩皮膜層は、パ
ッド材のカムに対する初期なじみ性及び耐ピツチング性
を大幅に向上させ、かつ相手攻撃性を減する作用をする
。これらの作用は、特にパッド材がカムにより高面圧を
受ける状態で使用される場合に効果が著しい。なお、上
記窒化層等が上記の効果を充分に発揮するには、１μｍ
以上の厚みを有することが望ましく、１μｍ以下である
と充分な効果が得られない場合がある。Further, the nitrided layer, nitrided reaction layer, and phosphate film layer greatly improve the initial conformability and pitting resistance of the pad material to the cam, and reduce the aggressiveness of the pad material. These effects are particularly effective when the pad material is used under high surface pressure from the cam. In addition, in order for the nitrided layer etc. to fully exhibit the above effects, the thickness is 1 μm.
It is desirable to have a thickness of at least 1 μm, and if it is less than 1 μm, sufficient effects may not be obtained.
更に、動弁部材において、そのパッド材がカムにより高
い面圧を受け、かつ高速運転等の過酷な条件下で使用さ
れる場合には、浸炭層の表面に窒化層を形成し、更に窒
化層の表面に重ねてリン酸塩度膜層を形成すると、初期
な゛じみ性、耐ピツチング性の向上及び相・手段撃性の
低減に有効である。Furthermore, in valve train parts, when the pad material is subjected to high surface pressure by the cam and is used under harsh conditions such as high-speed operation, a nitrided layer is formed on the surface of the carburized layer, and the nitrided layer is further removed. Forming a phosphate film layer on the surface of the material is effective in improving initial penetration properties, pitting resistance, and reducing reciprocal and mechanical impact properties.
この場合、窒化層は１μｍ以上、リン酸塩皮膜は０．５
μｍ以上の厚みをもたせることが望ましい。In this case, the nitride layer is 1μm or more, and the phosphate film is 0.5μm or more.
It is desirable to have a thickness of μm or more.
上記窒化層及び窒化反応層は、バッド１浸炭暫を形成し
、脱脂処理を施した後に、例えばシアン酸塩と炭酸塩と
の混合物を５５０〜５８０°Ｃ程度の温度に保った洛中
に浸漬して形成することができ、層の厚さは処理時間を
調整することによって定めることができる。なお、他方
軟窒化処理、イオン窒化処理により窒化層を形成するこ
ともできる。The above-mentioned nitrided layer and nitrided reaction layer are formed by forming a bad 1 carburizing layer, degreasing it, and then immersing it in, for example, a mixture of cyanate and carbonate kept at a temperature of about 550 to 580°C. The layer thickness can be determined by adjusting the processing time. On the other hand, the nitrided layer can also be formed by soft nitriding treatment or ion nitriding treatment.
また、リン酸塩皮膜は、窒化処理と同様に浸炭層を形成
し、脱脂処理を施した後に、例えば浴温度９２〜１００
°Ｃに保ったリン酸マンガン系の浴中に１〜１０分間程
度浸漬して形成することができる。In addition, the phosphate film is formed by forming a carburized layer in the same way as the nitriding treatment, and after degreasing treatment, for example, at a bath temperature of 92 to 100%.
It can be formed by immersing it in a manganese phosphate bath maintained at °C for about 1 to 10 minutes.
次に、本発明に使用するパッド材の焼結材料の組成につ
いて説明する。Next, the composition of the sintered material of the pad material used in the present invention will be explained.
上記焼結材料としては、重量％で示すと、Ｃが１、０〜
３．５％、Ｃｒが５．０〜２５．０％、Ｍｎが０．１〜
２．０％、Ｓｌが０．３〜２．０％、Ｐを０．１〜１．
０％または／およびＢをＯ，Ｑ １〜０．５％、Ｍ。The above-mentioned sintered material has a carbon content of 1.0 to 0.0% by weight.
3.5%, Cr 5.0~25.0%, Mn 0.1~
2.0%, Sl 0.3-2.0%, P 0.1-1.
0% or/and B O, Q 1-0.5%, M.
が１０％以下、ＷｘＮｂ％Ｔｉ、Ｚｒ％ Ｈｆ％Ｔａ、
Ｖからなる群から選択された１種以上の元素をａＱ％以
下、Ｎ１および／またけＣｏを５．０％以下、Ｃｕおよ
び／またはＳｎを１５％以下、かつ、前記ＣｒｌＭｏ’
、Ｗ 、Ｎ ｂ ｓ Ｔ １、Ｚ ｒ ｓＨｉ”ｓＴａ
、及びＶの合量が３０％以下であって、残部Ｆｅからな
り、他の不純物が１．５％以下であるものが望ましい。is 10% or less, WxNb%Ti, Zr% Hf%Ta,
One or more elements selected from the group consisting of V is aQ% or less, N1 and/or Co is 5.0% or less, Cu and/or Sn is 15% or less, and the CrlMo'
, W , N b s T 1, Z r sHi”sTa
, and V in a total amount of 30% or less, the balance being Fe, and other impurities being 1.5% or less.
炭素（Ｃ）は、マトリックスに固溶し、マトリックスの
硬さを高めて強化すると共に、６１％Ｍ。Carbon (C) is dissolved in the matrix, increases the hardness and strengthens the matrix, and has a 61% M content.
Ｗ ｓ Ｎ ｂ ｓ Ｔ １、Ｚ ｒｓ ■ｌ ｆ ％
’ｌ ａｑ ”Ｊと炭化物や複炭化物を形成し、耐摩耗
性を向上させる作用がある。含有量が１．０％未満では
上記の作用が充分に発現されず、また、３．５％を越え
ると炭化惣の量が増大し、結晶として成長するため、焼
結合金のマトリックスの靭性が低下し、摺動特性が大幅
に低下すると共に相手攻ｖ性が増大して好ましくない。W s N b s T 1, Z rs ■l f %
'l aq ' forms carbide or double carbide with J, and has the effect of improving wear resistance. If the content is less than 1.0%, the above effect will not be fully expressed, and if the content is less than 3.5%, If it exceeds this, the amount of carbide increases and grows as crystals, which reduces the toughness of the matrix of the sintered alloy, significantly lowering the sliding properties and increasing the aggressiveness of the other party, which is undesirable.
Ｃｒは、マトリックスに固溶し、素地の強化と耐熱性及
び摺動特性を向上させ、また、Ｃとの反応によシ生成す
る炭化物や複炭化物が耐摩耗性、耐スカツフインク性及
び初期なじみ性を向上させる作用がある。含有量が４０
％未満では、充分な効果が得られず、一方２５．０％を
越えると硬度の高い炭化物の生成量が増し、このため摺
動特性が悪化すると共に相手攻撃性が増して好ましくな
い。Cr forms a solid solution in the matrix and strengthens the base material and improves heat resistance and sliding properties, and carbides and double carbides produced by reaction with C improve wear resistance, scuffing resistance, and initial conformability. It has the effect of improving Content is 40
If it is less than 25.0%, no sufficient effect will be obtained, while if it exceeds 25.0%, the amount of hard carbide produced will increase, which will deteriorate the sliding properties and increase the aggressiveness of the opponent, which is not preferable.
また、Ｍｎは、マトリックスに画壇し、素地を強化する
と共に焼入性を向上させ、延いては耐摩耗性及び摺動特
性を著しく向上させる作用をもつ。Furthermore, Mn forms a matrix, strengthens the base material, improves hardenability, and has the effect of significantly improving wear resistance and sliding properties.
更に、焼結時においては、焼結性を向上させると共に低
温度で密度を上昇させる作用をする。とのＭｎの含有量
が０１％未満では、上記作用の充分な効果が得られず、
また２、０％を越えると相手攻撃性が増大して好ましく
ない。Furthermore, during sintering, it functions to improve sinterability and increase density at low temperatures. If the Mn content is less than 0.01%, sufficient effects of the above action cannot be obtained,
Moreover, if it exceeds 2.0%, the aggressiveness of the opponent increases, which is not preferable.
Ｓｌは、原料粉末を製造する際に添加されて脱酔剤とし
て作用する。また、焼結状態ではマ） ＩＪラックス強
化に効果がある。Ｓｌの添加量が０．３％未満であると
、原料粉末を脱酸する効果が少なく、特にＭｎ含有量が
多い場合には充分脱酸処理を行なう必要があり、０．３
％以上の添加が必要である。一方、２．０％を越えると
、焼結時の焼入性が低下して充分な硬さをもった焼結体
が得られず、これに伴って耐摩耗性が低下する◇
Ｐ及びＢは、とれらのいずれか一方または両方が添加さ
れるが、これらはいずれもマトリックスに固溶し、焼結
時の活性を高め、焼結に際して低温度で一部液相を生成
して焼結を促す作用がある。Sl is added when producing the raw material powder and acts as a desiccant agent. In addition, in the sintered state, it is effective in strengthening IJ lux. If the amount of Sl added is less than 0.3%, the effect of deoxidizing the raw material powder will be small, and if the Mn content is particularly high, sufficient deoxidation treatment will be required.
It is necessary to add more than %. On the other hand, if it exceeds 2.0%, the hardenability during sintering decreases, making it impossible to obtain a sintered body with sufficient hardness, and the wear resistance decreases accordingly◇ P and B Either one or both of these are added, but both of them form a solid solution in the matrix, increase the activity during sintering, and generate a partial liquid phase at a low temperature during sintering, increasing the sintering process. It has the effect of promoting
Ｐは０．１％未満、Ｂは０．０１％未満では充分な作用
を発現できない。またＰは１．０％、Ｂは０５％を越え
て添加すると、焼結時に生成する液相の量が過大となり
、焼結組織が粗大化して摺動特性が低下する。If P is less than 0.1% and B is less than 0.01%, sufficient effects cannot be expressed. Furthermore, if P exceeds 1.0% and B exceeds 0.5%, the amount of liquid phase generated during sintering becomes excessive, the sintered structure becomes coarse, and the sliding properties deteriorate.
また、Ｍｏは必要に応じて添加されるもので、マトリッ
クスに固溶し、マトリックスを強化させると共に焼入性
を向上させ、これに伴って焼結体の硬さを向上させる作
用をもつ。またＭｏが反応して生じる炭化物及び複炭化
物は、耐摩耗性を向上させるのみ々らず、摺動特性の向
上にも有効に作用する。Further, Mo is added as necessary, and is dissolved in the matrix to strengthen the matrix and improve hardenability, thereby improving the hardness of the sintered body. Furthermore, carbides and double carbides produced by the reaction of Mo not only improve the wear resistance but also effectively act to improve the sliding properties.
ＭＯの添加量が１０％を越えると、焼結に一件い生成す
る炭化物の量が増え、さらに粒界に針状の炭化物を形成
して焼結体が脆化し、耐摩耗性が低下すると共に相手攻
゛撃性が増大して好ましくない。When the amount of MO added exceeds 10%, the amount of carbides generated during sintering increases, and furthermore, acicular carbides are formed at grain boundaries, making the sintered body brittle and reducing wear resistance. At the same time, the opponent's aggressiveness increases, which is not desirable.
また更には、コスト高をも招くため、経済的にも好まし
くない。Moreover, it also causes an increase in cost, which is not economically preferable.
Ｗ％Ｎｂ１Ｔ１、Ｚｒ％Ｈｆ％Ｔａ及び■は、必要に応
じ″″ｃ１種以上が選択され、添加される。One or more types of W%Nb1T1, Zr%Hf%Ta and (2) are selected and added as required.
これらの成分は、いずれもＣ及びその他の成分と反応し
て微細々炭化物及び複炭化物を生成し、これら炭化物等
が耐摩耗性を高める作用をする。これらの成分の添加量
が８％を越えると、焼結に伴って生成するこれらの元素
の炭化物の量が過剰となシ、このため、極めて硬質な上
記炭化物によって相手攻撃性が高まると共に製造が難し
くなって好ましくない。更に、上記Ｎｂ％Ｔ１等の成分
は、高価であるためコスト高となって好ましくない。All of these components react with C and other components to produce fine carbides and double carbides, and these carbides serve to improve wear resistance. If the amount of these components added exceeds 8%, the amount of carbides of these elements generated during sintering will be excessive, and as a result, the extremely hard carbides will increase the aggressiveness of the other party and make manufacturing difficult. It becomes difficult and I don't like it. Furthermore, the components such as Nb%T1 are expensive, which increases the cost and is not preferable.
Ｎ１及びＣＯは、いずれか一方または両方を必要に応じ
て添加する。これらの成分は、マ） ＩＪラックス固溶
し、マトリックスを強化させ、特に焼結体の靭性、初期
なじみ性、耐熱性の向上に効果が大きい。Ｎ１及び／ま
たはＣＯは、５％を越えて含有させても著しい効果を得
るととはできず、却ってコスト高を招くことになるため
５％以下に抑えることが必要である。Either or both of N1 and CO are added as necessary. These components form a solid solution in the IJ lux, strengthen the matrix, and are particularly effective in improving the toughness, initial conformability, and heat resistance of the sintered body. Even if N1 and/or CO are contained in an amount exceeding 5%, no significant effect will be obtained, and on the contrary, it will lead to higher costs, so it is necessary to suppress it to 5% or less.
捷たＣｕ及びＳｎは、いずれか一方または両方を必要に
応じて添加する。これらの成分は、マトリックスに固溶
し、焼結時に一部が液相を生成して焼結の安定化に寄与
する他、基地の強化及び炭化物の微細化に有効な作用を
する。さらに、Ｃｕまたは／およびＳｎの未固溶部分は
、焼結体の初期なじみ性、摺動特性の向上に大きな効果
を発揮する。これらＣｕ及びＳｎは、１５％を越えて含
有させると、焼結体の強度を低下させ、また耐摩耗性を
低下させるため好ましくない。Either or both of the crushed Cu and Sn are added as necessary. These components form a solid solution in the matrix, and part of them generates a liquid phase during sintering, contributing to stabilization of sintering, as well as having an effective effect on strengthening the matrix and refining carbides. Furthermore, the undissolved portion of Cu and/or Sn has a great effect on improving the initial conformability and sliding properties of the sintered body. When these Cu and Sn are contained in an amount exceeding 15%, it is not preferable because it lowers the strength and wear resistance of the sintered body.
また、前記Ｃｒ ｓ Ｍｏ ｓ Ｗ％Ｎ ｂ −Ｔ ｉ
、ＺｒｑＨｆｓＴａ及び■の総量は、重量％で３０％以
下とすることが必要である。３０％を越えると、得られ
る焼結体の相手攻撃性が増すと共に、靭性が低下して好
ましくない。Moreover, the above Cr s Mo s W%N b −T i
, ZrqHfsTa and (2) must be 30% or less by weight. If it exceeds 30%, the resulting sintered body becomes more aggressive towards others and has lower toughness, which is not preferable.
更には、上記の組成を有する焼結材料を焼結するにあた
っては、得６れる焼結体の密度比が８７％以上となる東
件を選択することが望ましい。上記密度比が、８７％よ
り低くなると、特に高圧面下で使用する場合の耐摩耗性
が低下すると共に、窒化処理にあたって所望の窒化層が
得られない場合がある。Furthermore, when sintering a sintered material having the above composition, it is desirable to select a material that provides a sintered body with a density ratio of 87% or more. When the density ratio is lower than 87%, wear resistance particularly when used under a high-pressure surface decreases, and a desired nitrided layer may not be obtained during nitriding treatment.
しかして、上記のような特定の組成を有する焼結材料を
焼結して形成され、表面に浸炭層が形成されると共に、
この浸炭層の表面に窒化層、窒化反応層、リン酸塩皮膜
層のうちの１種以上が形成されたパッド材は、その基体
となる焼結体が詳述したように特有の組成をもって耐摩
耗性、靭性、初期なじみ性が高められ、かつ相手攻撃性
が低減されており、更に、焼結体の表面の窒化層等゛に
よって耐ピツチング性、耐スカッフィング性、初期なじ
み性が高められ、かつ相手攻撃性が低減されている。こ
のため上記パッド材を備えた本発明の動弁部材は、上記
の焼結体と表面層との良好な特性が相俟って、耐摩耗性
、靭性、初期なじみ性、耐ピツチング性、耐スカッフィ
ング性が高く、かつ相手攻撃性が低い等、カムフォロア
として良好な性質を持っている。更には、前記窒化層、
リン酸塩皮膜等が焼結体に形成された浸炭層の表面に形
成されているため、浸炭層により前記表面層を形成する
に際してマトリックスの軟化を防止することができると
共に、表面層と焼結合金（マトリックス）との結合性が
高められ、従って動弁部材として耐久性に優れている等
の長所を有するものである。Therefore, it is formed by sintering a sintered material having a specific composition as described above, and a carburized layer is formed on the surface,
The pad material, in which one or more of a nitrided layer, a nitrided reaction layer, and a phosphate film layer is formed on the surface of this carburized layer, has a unique composition as described in detail in the sintered body that serves as its base, and has a high durability. Abrasion resistance, toughness, and initial conformability are improved, and the aggressiveness of the mating material is reduced.Furthermore, the pitting resistance, scuffing resistance, and initial conformability are enhanced by the nitrided layer on the surface of the sintered body. In addition, the opponent's aggressiveness is reduced. Therefore, the valve train member of the present invention equipped with the above-mentioned pad material has good properties of the above-mentioned sintered body and surface layer, and has excellent wear resistance, toughness, initial conformability, pitting resistance, and resistance. It has good properties as a cam follower, such as high scuffing properties and low attack on opponents. Furthermore, the nitrided layer,
Since a phosphate film, etc. is formed on the surface of the carburized layer formed on the sintered body, the carburized layer can prevent the matrix from softening when forming the surface layer, and can also form a sintered bond with the surface layer. It has advantages such as improved bondability with gold (matrix) and therefore excellent durability as a valve operating member.
次に、実施例を示して本発明を更に具体的に説明する。Next, the present invention will be explained in more detail with reference to Examples.
以下に示す■〜■の乙種の粉末焼結材料を調整し、これ
らにＮ１、Ｃｏ％Ｃｕ、Ｓｎ、Ｃｕ−１２％Ｓｎ、Ｃ粉
末を下記の表に示す割合（焼結材料に対する重量％）で
混合し、それぞれをタペットのパッド材として成形焼結
し、これらのバッド材を５Ｃｒ４２０製のタペット本体
に銅ロウによりロウ付けを行った。次いで、パッド材表
面に浸炭処理を施し、その表面に窒化層を形成し、更に
試料の一部にはリン酸塩皮膜を形成してタペットを作成
した。Prepare the powder sintered materials of Type B shown below from ■ to ■, and add N1, Co%Cu, Sn, Cu-12%Sn, and C powders to these in the proportions shown in the table below (% by weight relative to the sintered material). The materials were mixed and molded and sintered as tappet pad materials, and these pad materials were brazed to a tappet body made of 5Cr420 using copper brazing. Next, the surface of the pad material was carburized to form a nitrided layer on the surface, and a phosphate film was further formed on a part of the sample to create a tappet.
また比較のために浸炭処理を施さずに窒化層または／お
よびリン酸塩皮膜を形成したパッド材を作成し、５Ｃｒ
４２ｏ製のタペット本体に固定して比較用タペットを作
成した。For comparison, a pad material with a nitride layer and/or phosphate film formed without carburizing was prepared.
A comparison tappet was created by fixing it to a tappet body made of 42o.
上記のタペットを、ディーゼルエンジンのリフターバル
ブに組み付け、カムとしてＳＣＭ−浸炭焼入品を用いて
特殊劣化油中で、荷重２００ｋｇ、回転数１５０Ｏｒｐ
ｍ の条件１３００時間運転し、タペットの状態及びカ
ムの摩耗量を調べた。その結果を表中に示しである。The above tappet was assembled to the lifter valve of a diesel engine, and a SCM-carburized and quenched product was used as the cam in special degraded oil at a load of 200 kg and a rotation speed of 150 Orp.
The machine was operated for 1,300 hours under the conditions of 1,300 m, and the condition of the tappet and the amount of wear on the cam were examined. The results are shown in the table.
０ 粉末焼結材料（重量％）
■ ３．５％Ｃ−ｒ −０，５％Ｍ ｎ −１，０％５
１−Ｑ、 ５ ：、 ｐ−残部Ｆ ｅ ｓ
■ １２．０％Ｃｒ −０，５％Ｍ ｎ −１，０％Ｓ
１−α５％Ｐ−残部Ｆ ｅ ｓ
■ １２．０％Ｃｒ −０，５％Ｍ ｎ −１，０％
Ｓ ｉ −１，５％ＭＯ−五〇％Ｎｂ−［Ｌ５％Ｐ−残
部 ｅ ｓ
■ １２ｆｆ１％ Ｃｒ −０，８％Ｍ ｎ −” １
．０％Ｓ ｉ −５，０１Ｍ ｏ −２，０％Ｎｂ−１
，０％Ｔ１−２．０％Ｔａ−１，０％Ｚ ｒ −１，０
％Ｈｆ −１，０％Ｖ−４．０％Ｗ−１５％Ｐ−残部ｐ
ｅ ％
■ １２．０％Ｃｒ −２，０％Ｍ ｎ −２，０％８
１−０．５％Ｐ−残部Ｆθ、
■ ２５％Ｃｒ −０，１％Ｍ１１−０．３％Ｓｉ １
．５゛％Ｃ−０，１％Ｐ−残部Ｆｅ
表に示したように、本発明の動弁部材は、耐ピツチング
性に優れ、またカムの一耗量が比較例に比べて極めて小
さいことから、初期なじみ性が高く、相手攻撃性が小さ
いことが分かる。0 Powder sintered material (weight%) ■ 3.5%Cr -0,5%M n -1,0%5
1-Q, 5:, p-remainder Fe s ■ 12.0%Cr -0,5%M n -1,0%S
1-α5%P-Remainder Fe s ■ 12.0%Cr -0,5%M n -1,0%
S i -1,5%MO-50%Nb-[L5%P-remainder e s ■ 12ff1% Cr -0,8%M n -” 1
．． 0%S i -5,01M o -2,0%Nb-1
,0%T1-2.0%Ta-1,0%Z r -1,0
%Hf -1.0%V-4.0%W-15%P-Remainder p
e % ■ 12.0%Cr -2,0%M n -2,0%8
1-0.5%P-Remainder Fθ, ■ 25%Cr-0.1%M11-0.3%Si 1
．． 5% C - 0.1% P - balance Fe As shown in the table, the valve train member of the present invention has excellent pitting resistance, and the wear amount of the cam is extremely small compared to the comparative example. , it can be seen that initial familiarity is high and opponent aggression is low.
Claims (1)
られてなる内燃機関用動弁部材において、前記パッド材
が粉末焼結材からなり、とのバット材は、表面に浸炭層
を有すると共に、この浸炭層の表面に窒化層、窒化反応
層、及びリン酸塩皮膜のうちの１種以上の皮膜層を有し
てなるととを特徴とする内燃機関用動弁部材。 ２ 前記パッド材は、前記浸炭層の表面に厚さ１μｍ以
上の窒化層または窒化反応層を有し、かつこの窒化層ま
たは窒化反応層の表面ＫＯ１５μｍ以上のリン酸塩皮膜
が形成されてなる特許請求の範囲第１項記載の内燃機関
用動弁部材。 ＆ 前記パッド材は、重量％で、− Ｃ： １．０〜＆５％、 Ｃｒ：５．０−２５．０％、 Ｍｎ： ０．１〜２． Ｑ ％、 Ｓｌ： ［ｌＬ３〜２．０％、 Ｐ ： ０．１〜１．０％または／およびＢ：Ｑ、０１
〜０．５％、 Ｍｏ： １０％以下、 Ｗ％Ｗｂ、’ｒ１、Ｚ ｒ’ｓ Ｈｆｓ Ｔ ａ、 Ｖ
からなる群から選択された１種以上の元素を８０％以下
、Ｎ１および／またはＣＯ：５゜０％以下、Ｃｕおよび
／またはＳｎ：１５％以下、不純物を１．５％以下、
− かつ前記Ｃｒ、 Ｗｉｏ、Ｗｓ Ｎｂｔ Ｔ １、Ｚ
ｒ ５）（ｆｘＴａ及び■の合量が３０％以下であって
、残部Ｆｅから彦る焼結材料から焼結されて々る特許請
求の範囲第１項または第２項記載の内燃機関用動弁部材
。[Scope of Claims] 1. A valve train member for an internal combustion engine comprising a butt material forming a sliding surface on a valve train member body, wherein the pad material is made of a powder sintered material. is for an internal combustion engine, characterized in that it has a carburized layer on its surface, and a film layer of one or more of a nitrided layer, a nitrided reaction layer, and a phosphate film on the surface of this carburized layer. Valve train parts. 2. The pad material has a nitrided layer or nitrided reaction layer with a thickness of 1 μm or more on the surface of the carburized layer, and a phosphate film with a KO of 15 μm or more is formed on the surface of the nitrided layer or nitrided reaction layer. A valve operating member for an internal combustion engine according to claim 1. & The pad material has, in weight percent, -C: 1.0-5%, Cr: 5.0-25.0%, Mn: 0.1-2. Q%, Sl: [lL3-2.0%, P: 0.1-1.0% or/and B:Q, 01
~0.5%, Mo: 10% or less, W%Wb, 'r1, Z r's Hfs Ta, V
80% or less of one or more elements selected from the group consisting of, N1 and/or CO: 5°0% or less, Cu and/or Sn: 15% or less, impurities 1.5% or less,
- and the above Cr, Wio, Ws Nbt T 1, Z
r 5) The internal combustion engine drive according to claim 1 or 2, which is sintered from a sintered material in which the total amount of (fxTa and ()) is 30% or less, and the balance is Fe. valve member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15054283A JPS6043107A (en) | 1983-08-18 | 1983-08-18 | Control valve member for use in internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15054283A JPS6043107A (en) | 1983-08-18 | 1983-08-18 | Control valve member for use in internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6043107A true JPS6043107A (en) | 1985-03-07 |
| JPH0344202B2 JPH0344202B2 (en) | 1991-07-05 |
Family
ID=15499142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15054283A Granted JPS6043107A (en) | 1983-08-18 | 1983-08-18 | Control valve member for use in internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6043107A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6321307A (en) * | 1986-07-11 | 1988-01-28 | Nissan Motor Co Ltd | Rocker arm tip |
| JPH0223215A (en) * | 1988-07-13 | 1990-01-25 | Fuji Valve Co Ltd | Valve lifter for internal combustion engine and manufacture thereof |
| JPH02215905A (en) * | 1989-02-13 | 1990-08-28 | Yamaha Motor Co Ltd | Adjusting pad in valve closing system of ohc engine |
| US5758415A (en) * | 1995-05-08 | 1998-06-02 | Fuji Oozx Inc. | Method of manufacturing a tappet in an internal combustion engine |
| JP2002310065A (en) * | 2001-04-16 | 2002-10-23 | Matsushita Refrig Co Ltd | Compressor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS504447A (en) * | 1973-05-18 | 1975-01-17 | ||
| JPS5116541A (en) * | 1974-07-31 | 1976-02-09 | Shimano Industrial Co | JITENSHAYOTA IMAMOBUHINNO SEIZOHO |
| JPS57108247A (en) * | 1980-12-24 | 1982-07-06 | Hitachi Powdered Metals Co Ltd | Member of moving valve mechanism of internal combustion engine |
-
1983
- 1983-08-18 JP JP15054283A patent/JPS6043107A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS504447A (en) * | 1973-05-18 | 1975-01-17 | ||
| JPS5116541A (en) * | 1974-07-31 | 1976-02-09 | Shimano Industrial Co | JITENSHAYOTA IMAMOBUHINNO SEIZOHO |
| JPS57108247A (en) * | 1980-12-24 | 1982-07-06 | Hitachi Powdered Metals Co Ltd | Member of moving valve mechanism of internal combustion engine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6321307A (en) * | 1986-07-11 | 1988-01-28 | Nissan Motor Co Ltd | Rocker arm tip |
| JPH0467002B2 (en) * | 1986-07-11 | 1992-10-27 | Nissan Motor | |
| JPH0223215A (en) * | 1988-07-13 | 1990-01-25 | Fuji Valve Co Ltd | Valve lifter for internal combustion engine and manufacture thereof |
| JPH02215905A (en) * | 1989-02-13 | 1990-08-28 | Yamaha Motor Co Ltd | Adjusting pad in valve closing system of ohc engine |
| US5758415A (en) * | 1995-05-08 | 1998-06-02 | Fuji Oozx Inc. | Method of manufacturing a tappet in an internal combustion engine |
| JP2002310065A (en) * | 2001-04-16 | 2002-10-23 | Matsushita Refrig Co Ltd | Compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0344202B2 (en) | 1991-07-05 |
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