JPH05140701A - Two layer valve seat made of ferrous sintered alloy for internal combustion engine - Google Patents
Two layer valve seat made of ferrous sintered alloy for internal combustion engineInfo
- Publication number
- JPH05140701A JPH05140701A JP32713291A JP32713291A JPH05140701A JP H05140701 A JPH05140701 A JP H05140701A JP 32713291 A JP32713291 A JP 32713291A JP 32713291 A JP32713291 A JP 32713291A JP H05140701 A JPH05140701 A JP H05140701A
- Authority
- JP
- Japan
- Prior art keywords
- sintered alloy
- layer
- based sintered
- valve seat
- combustion engine
- 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
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、すぐれた高温強度を
有し、かつ耐摩耗性にもすぐれた内燃機関の鉄系焼結合
金製２層バルブシートに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer valve seat made of a ferrous sintered alloy for an internal combustion engine, which has excellent high temperature strength and excellent wear resistance.
【０００２】[0002]
【従来の技術】従来、内燃機関のバルブシートとして、
特開昭４９−９６９１２号公報に記載される通り、重量
％で（以下、単に％は重量％を意味する）、 Ｃ：０．４〜２％、 Ｍｏ：２〜１０％、 Ｎｉ：０．５〜３％、 Ｃｒ：１〜６％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する耐摩耗性のすぐ
れたＦｅ基焼結合金が用いられている。2. Description of the Related Art Conventionally, as a valve seat for an internal combustion engine,
As described in JP-A-49-96912, in% by weight (hereinafter, simply% means% by weight), C: 0.4 to 2%, Mo: 2 to 10%, Ni: 0. A Fe-based sintered alloy containing 5 to 3%, Cr: 1 to 6%, and a balance of Fe and inevitable impurities, and a porosity of 10 to 20% by volume and having excellent wear resistance. It is used.
【０００３】[0003]
【発明が解決しようとする課題】一方、近年の自動車は
じめ、各種駆動機関の高速化、高出力化、および軽量化
はめざましく、これに伴ない、これの構造部材であるバ
ルブシートの使用環境は一段と苛酷さを増し、特に内燃
機関内の燃焼ガスの高温化は著しく、かかる状況下で上
記の従来鉄系焼結合金製バルブシートは、すぐれた耐摩
耗性を示すものの、高温強度が十分でないために、軽量
化のための薄肉化および小型化をはかることができない
のが現状である。On the other hand, in recent years, such as automobiles and various drive engines have been remarkably increased in speed, output and weight, and accordingly, the operating environment of the valve seat, which is a structural member thereof, has been increased. It becomes even more severe, and the temperature of the combustion gas in the internal combustion engine is particularly high. Under such circumstances, the conventional iron-based sintered alloy valve seats described above show excellent wear resistance, but their high-temperature strength is not sufficient. For this reason, it is the current situation that it is not possible to reduce the thickness and the size for weight reduction.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、耐摩耗性および高温強度のすぐ
れた鉄系焼結合金製バルブシートを開発すべく、特に上
記の従来鉄系焼結合金製バルブシートに着目し、研究を
行なった結果、上記の従来鉄系焼結合金製バルブシート
を構成するＦｅ基焼結合金を耐摩耗性の要求されるバル
ブ当接層とし、これにバックアップ層として、 Ｃ：０．３〜１．２％、 Ｃｒ：１．２〜３．５
％、 Ｍｏ：０．１〜１％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有するＦｅ基焼結合金
を一体焼結結合すると、このバックアップ層はすぐれた
高温強度をもつことから、バルブシート自体が、すぐれ
た耐摩耗性と合せてすぐれた高温強度を具備するように
なるという研究結果を得たのである。Therefore, the present inventors have
From the above-mentioned viewpoints, as a result of conducting research in order to develop an iron-based sintered alloy valve seat having excellent wear resistance and high-temperature strength, particularly focusing on the above conventional iron-based sintered alloy valve seat. The Fe-based sintered alloy that constitutes the above-mentioned conventional iron-based sintered alloy valve seat is used as a valve contact layer requiring wear resistance, and as a backup layer, C: 0.3 to 1.2% , Cr: 1.2 to 3.5
%, Mo: 0.1 to 1%, and the balance consisting of Fe and inevitable impurities, and a Fe-based sintered alloy having a porosity of 10 to 20% by volume. Since the backup layer has excellent high-temperature strength, the research results show that the valve seat itself has excellent high-temperature strength combined with excellent wear resistance.
【０００５】したがって、この発明は、上記の研究結果
にもとづいてなされたものであって、 （ａ） Ｆｅ基焼結合金のバルブ当接層と、これと一体
焼結結合されたＦｅ基焼結合金のバックアップ層の２層
構造を有する内燃機関の鉄系焼結合金製２層バルブシー
トにして、上記バルブ当接層を、 Ｃ：０．４〜２％、 Ｍｏ：２〜１０％、 Ｎｉ：０．５〜３％、 Ｃｒ：１〜６％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する耐摩耗性のすぐ
れたＦｅ基焼結合金で構成し、上記バックアップ層を、 Ｃ：０．３〜１．２％、 Ｃｒ：１．２〜３．５
％、 Ｍｏ：０．１〜１％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する高温強度のすぐ
れたＦｅ基焼結合金で構成してなる内燃機関の鉄系焼結
合金製２層バルブシート。 （ｂ） 上記（ａ）の鉄系焼結合金製２層バルブシート
に、熱伝導性を向上させる目的で、全体に占める割合で
５〜２０％の純銅またはＣｕ合金を含浸してなる内燃機
関の鉄系焼結合金製２層バルブシート。 （ｃ） 上記（ａ）の鉄系焼結合金製２層バルブシート
に、潤滑性を付与する目的で、全体に占める割合で５〜
２０％の純鉛またはＰｂ合金を溶浸してなる内燃機関の
鉄系焼結合金製２層バルブシート。に特徴を有するもの
である。Therefore, the present invention has been made based on the above-mentioned research results. (A) A valve contact layer of an Fe-based sintered alloy and an Fe-based sintering bond integrally sintered with the valve contact layer. A two-layer valve seat made of an iron-based sintered alloy for an internal combustion engine having a two-layer structure of a gold backup layer, wherein the valve contact layer is C: 0.4 to 2%, Mo: 2 to 10%, Ni Fe-based calcination having excellent wear resistance, containing 0.5 to 3%, Cr: 1 to 6%, and a balance of Fe and unavoidable impurities, and having a porosity of 10 to 20% by volume. The back-up layer is composed of bonded gold, C: 0.3 to 1.2%, Cr: 1.2 to 3.5.
%, Mo: 0.1 to 1%, with the balance consisting of Fe and unavoidable impurities, and a high-temperature-strength Fe-based sintered alloy having a porosity of 10 to 20% by volume. A two-layer valve seat made of a ferrous sintered alloy for an internal combustion engine. (B) An internal combustion engine obtained by impregnating the iron-based sintered alloy two-layer valve seat of (a) above with pure copper or Cu alloy in an amount of 5 to 20% of the whole for the purpose of improving thermal conductivity. A two-layer valve seat made of a ferrous sintered alloy. (C) For the purpose of imparting lubricity to the iron-based sintered alloy two-layer valve seat of the above (a), the ratio is 5 to 5 in the whole.
A two-layer valve seat made of an iron-based sintered alloy for an internal combustion engine, which is obtained by infiltrating 20% of pure lead or Pb alloy. It is characterized by
【０００６】つぎに、この発明の鉄系焼結合金製２層バ
ルブシートにおいて、バルブ当接層およびバックアップ
層を構成するＦｅ基焼結合金の組成および空孔率を上記
の通りに限定した理由を説明する。Next, in the iron-based sintered alloy two-layer valve seat of the present invention, the reason why the composition and porosity of the Fe-based sintered alloy constituting the valve contact layer and the backup layer are limited as described above. Will be explained.
【０００７】Ａ．バルブ当接層の成分組成 （ａ） Ｃ Ｃ成分には、素地に固溶して、これを強化するばかりで
なく、ＭｏやＣｒと炭化物を形成して耐摩耗性を向上さ
せる作用があるが、その含有量が０．４％未満では前記
作用に所望の効果が得られず、一方その含有量が２％を
越えると、相手部材であるバルブの損傷が増すようにな
るほか、被削性も低下するようになることから、その含
有量を０．４〜２％と定めた。A. Component composition of valve contact layer (a) C C component has the function of not only solid-solving in the matrix to strengthen it, but also forming carbides with Mo and Cr to improve wear resistance. If the content is less than 0.4%, the desired effect cannot be obtained, while if the content exceeds 2%, damage to the valve, which is a mating member, increases, and machinability is increased. Therefore, the content is determined to be 0.4 to 2%.
【０００８】（ｂ） Ｍｏ Ｍｏ成分には、炭化物を形成して耐摩耗性を向上させる
ほか、熱間での衝撃摩耗を低減させる作用があるが、そ
の含有量が２％未満では前記作用に所望の効果が得られ
ず、その含有量が１０％を越えると、焼結性が低下する
ようになると共に、相手攻撃性も増すようになることか
ら、その含有量を２〜１０％と定めた。(B) Mo Mo The Mo component not only has the effect of forming carbides to improve wear resistance, but also has the effect of reducing impact wear during hot work. If the desired effect cannot be obtained and the content exceeds 10%, the sinterability will decrease and the opponent attack will also increase, so the content is defined as 2 to 10%. It was
【０００９】（ｃ） Ｎｉ Ｎｉ成分には、素地に固溶して強度を向上させる作用が
あるが、その含有量が０．５％未満では所望の強度向上
効果が得られず、一方その含有量が３％を越えてもより
一層の強度向上効果は得られず、経済性を考慮して、そ
の含有量を０．５〜３％と定めた。(C) Ni The Ni component has the action of forming a solid solution in the matrix to improve the strength, but if its content is less than 0.5%, the desired strength-improving effect cannot be obtained. Even if the amount exceeds 3%, the effect of further improving the strength cannot be obtained, and in consideration of economical efficiency, the content thereof is set to 0.5 to 3%.
【００１０】（ｄ） Ｃｒ Ｃｒ成分には、Ｍｏとの共存において、同様に炭化物を
形成して耐摩耗性を向上させるが、その含有量が１％未
満では前記作用に所望の効果が得られず、一方その含有
量が６％を越えると相手攻撃性が増すようになることか
ら、その含有量を１〜６％と定めた。(D) Cr The Cr component, in the coexistence with Mo, similarly forms carbides to improve the wear resistance, but if the content is less than 1%, the desired effect can be obtained in the above action. On the other hand, on the other hand, if the content exceeds 6%, the attacking property against the opponent will increase, so the content was defined as 1 to 6%.
【００１１】Ｂ．バックアップ層の成分組成 （ａ） Ｃ Ｃ成分には、素地に固溶して、これの強度を向上させる
作用があるが、その含有量が０．３％未満では所望の強
度向上効果が得られず、一方その含有量が１．２％を越
えると、炭化物が析出し、高温強度低下の原因となるこ
とから、その含有量を０．３〜１．２％と定めた。B. Component composition of backup layer (a) The C component has a function of forming a solid solution in the base material to improve the strength thereof, but if the content thereof is less than 0.3%, a desired strength improving effect can be obtained. On the other hand, on the other hand, when the content exceeds 1.2%, carbides precipitate and cause a decrease in high temperature strength. Therefore, the content was set to 0.3 to 1.2%.
【００１２】（ｂ） ＣｒおよびＭｏ これらの成分には、いずれも共存固溶して高温強度を向
上させる作用があるが、その含有量がそれぞれＣｒ：
１．２％未満および０．１％未満では所望の高温強度向
上効果が得られるが、一方その含有量がそれぞれＣｒ：
３．５％およびＭｏ：１％を越えると、素地中に炭化物
が析出するようになって、高温強度を低下させることか
ら、その含有量を、それぞれＣｒ：１．２〜３．５％お
よびＭｏ：０．１〜１％と定めた。(B) Cr and Mo All of these components have the action of coexisting in solid solution to improve the high temperature strength.
If it is less than 1.2% and less than 0.1%, the desired high-temperature strength improving effect can be obtained, while the contents thereof are Cr:
If it exceeds 3.5% and Mo: 1%, carbides will be precipitated in the matrix and the high temperature strength will be reduced. Therefore, the contents of Cr: 1.2-3.5% and Mo: It was set to 0.1 to 1%.
【００１３】Ｃ．空孔率および銅含浸（鉛溶浸）割合 空孔率が１０容量％未満では、銅含浸（鉛溶浸）を行な
う場合、これの割合が５％未満となってしまい、これに
よってもたらされる熱伝導性および潤滑性の向上効果が
十分に得られず、一方空孔率が２０容量％を越えると、
銅含浸（鉛溶浸）の割合も２０％を越えて多くなるが、
強度および耐摩耗性の急激な低下が避けられなくなるこ
とから、空孔率を１０〜２０容量％、銅含浸（鉛溶浸）
割合を５〜２０％と定めた。C. Porosity and copper impregnation (lead infiltration) ratio When the porosity is less than 10% by volume, when copper impregnation (lead infiltration) is performed, the ratio becomes less than 5%, and the heat generated by this If the effect of improving conductivity and lubricity is not sufficiently obtained, while the porosity exceeds 20% by volume,
The proportion of copper impregnation (lead infiltration) also exceeds 20% and increases,
Poor porosity of 10 to 20% by volume, copper impregnation (lead infiltration), because a sharp decrease in strength and wear resistance cannot be avoided.
The ratio was set to 5 to 20%.
【００１４】[0014]
【実施例】つぎに、この発明の２層バルブシートを実施
例により具体的に説明する。原料粉末として、粒度：−
１００meshのＦｅ粉末、同−２００meshのＭｏ粉末、同
−１００meshの高炭素Ｆｅ−Ｃｒ合金（Ｃｒ：６０％、
Ｃ：６％含有）粉末、同−２００meshのＮｉ粉末、およ
び同−２００meshのＣｒ粉末、および同−２００meshの
黒鉛粉末を用意し、これら原料粉末をそれぞれ表１に示
されるバルブ当接層およびバックアップ層形成のための
配合組成に配合し、ステアリン酸亜鉛：１％を加えてミ
キサーにて３０分間混合した後、バルブ当接層とバック
アップ層の相対割合が重量比で４：６となる割合に金型
内に装入し、５〜７ton ／cm2 の範囲内の所定の圧力で
圧粉体にプレス成形し、この圧粉体を５００℃に３０分
間保持して脱脂し、ついでアンモニア分解ガス雰囲気
中、１１５０℃の温度に１時間保持の条件で焼結して、
同じく表１に示される空孔率を有し、かつ配合組成と実
質的に同一の組成、並びに外径：３４mm×内径：２７mm
×厚さ：７．２mmの寸法をもった焼結体を形成し、この
焼結体の１部に、純銅または表１に示される組成のＣｕ
合金溶解材を含浸材として用い、所定量の前記含浸材を
上記焼結体の上面に載置し、この状態で、メタン変成ガ
ス雰囲気中、温度：１１００℃に１５分間保持の条件で
同じく表１に示される割合の銅含浸処理を行ない、さら
に他の上記焼結体の１部には、溶浸材として純鉛または
表１に示される組成のＰｂ合金材を用い、これら溶浸材
の加熱浴中に、窒素雰囲気中、浴表面に８kg／cm2 の圧
力を付加した状態で１時間浸漬し、表１に示される割合
の鉛溶浸処理を行なうことにより焼結ままの本発明２層
バルブシート、銅含浸の本発明２層バルブシート４〜
６、および鉛含浸の本発明２層バルブシート７〜９をそ
れぞれ製造した。EXAMPLES Next, the two-layer valve seat of the present invention will be specifically described by way of examples. As raw material powder, particle size:-
Fe powder of 100 mesh, Mo powder of -200 mesh, high carbon Fe-Cr alloy of -100 mesh (Cr: 60%,
C: 6% content) powder, -200mesh Ni powder, -200mesh Cr powder, and -200mesh graphite powder were prepared, and these raw material powders were used as the valve contact layer and backup as shown in Table 1, respectively. After blending in the blending composition for layer formation and adding zinc stearate: 1% and mixing in a mixer for 30 minutes, the relative ratio of the valve contact layer and the backup layer becomes 4: 6 by weight. It is charged in a mold and pressed into a green compact at a predetermined pressure within the range of 5 to 7 ton / cm 2 , and the green compact is held at 500 ° C. for 30 minutes to degrease it, and then decomposed with ammonia gas. Sinter in an atmosphere at a temperature of 1150 ° C. for 1 hour,
Similarly, the composition has the porosity shown in Table 1 and is substantially the same as the composition, and the outer diameter is 34 mm and the inner diameter is 27 mm.
× Thickness: A sintered body having a size of 7.2 mm was formed, and pure copper or Cu having the composition shown in Table 1 was formed in a part of this sintered body.
Using an alloy melting material as an impregnating material, a predetermined amount of the impregnating material was placed on the upper surface of the sintered body, and in this state, the temperature was kept at 1100 ° C. for 15 minutes in the same atmosphere as above. Copper impregnation treatment of the ratio shown in 1 was performed, and pure lead or a Pb alloy material having the composition shown in Table 1 was used as a part of the other sintered body, and The present invention as-sintered by immersing for 1 hour in a heating bath in a nitrogen atmosphere with a pressure of 8 kg / cm 2 applied to the surface of the bath and performing lead infiltration treatment at the ratio shown in Table 1 2-layer valve seat, copper-impregnated 2-layer valve seat 4 of the present invention
6 and lead impregnated two-layer valve seats 7 to 9 of the present invention were manufactured.
【００１５】[0015]
【表１】 [Table 1]
【００１６】また、比較の目的で、表２に示される通り
バックアップ層の形成を行なわない以外は同一の条件で
従来単層バルブシート１〜９をそれぞれ製造した。For the purpose of comparison, conventional single-layer valve seats 1 to 9 were manufactured under the same conditions except that the backup layer was not formed as shown in Table 2.
【００１７】[0017]
【表２】 [Table 2]
【００１８】つぎに、この結果得られた本発明２層バル
ブシート１〜９および従来単層バルブシート１〜９の常
温および４００℃の引張強さを測定し、この測定結果を
表１，２に示した。Next, the two-layer valve seats 1 to 9 of the present invention and the conventional single-layer valve seats 1 to 9 thus obtained were measured for tensile strength at room temperature and 400 ° C., and the measurement results are shown in Tables 1 and 2. It was shown to.
【００１９】[0019]
【発明の効果】表１，２に示される結果から、本発明２
層バルブシート１〜９は、いずれも従来単層バルブシー
ト１〜９に比して相対的に高い常温および高温強度を有
することが明らかである。上述のように、この発明の鉄
系焼結合金製２層バルブシートは、特にすぐれた高温強
度を有するので、小型化および薄肉化した状態で、苛酷
な条件下での実用に供しても、すぐれた性能を長期に亘
って発揮するのである。From the results shown in Tables 1 and 2, the present invention 2
It is apparent that the layer valve seats 1 to 9 have relatively high room temperature and high temperature strengths as compared with the conventional single layer valve seats 1 to 9. As described above, since the iron-based sintered alloy two-layer valve seat of the present invention has particularly excellent high temperature strength, even if it is put into practical use under severe conditions in a compact and thin state, It has excellent performance over a long period of time.
Claims (3)
と一体焼結結合されたＦｅ基焼結合金のバックアップ層
の２層構造を有する内燃機関の鉄系焼結合金製２層バル
ブシートにして、 上記バルブ当接層を、以下重量％で、 Ｃ：０．４〜２％、 Ｍｏ：２〜１０％、 Ｎｉ：０．５〜３％、 Ｃｒ：１〜６％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する耐摩耗性のすぐ
れたＦｅ基焼結合金で構成し、 上記バックアップ層を、 Ｃ：０．３〜１．２％、 Ｃｒ：１．２〜３．５
％、 Ｍｏ：０．１〜１％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する高温強度のすぐ
れたＦｅ基焼結合金で構成したことを特徴とする内燃機
関の鉄系焼結合金製２層バルブシート。1. A two-layer structure of an iron-based sintered alloy for an internal combustion engine having a two-layer structure of a valve contact layer of an Fe-based sintered alloy and a backup layer of an Fe-based sintered alloy integrally sinter-bonded therewith. In the valve seat, the valve contact layer, in the following weight%, C: 0.4 to 2%, Mo: 2 to 10%, Ni: 0.5 to 3%, Cr: 1 to 6%, The backup layer is made of a Fe-based sintered alloy that contains Fe and unavoidable impurities, and has a porosity of 10 to 20% by volume. ~ 1.2%, Cr: 1.2-3.5
%, Mo: 0.1 to 1%, with the balance being Fe and inevitable impurities, and a high-temperature-strength Fe-based sintered alloy having a porosity of 10 to 20% by volume. A two-layer valve seat made of a ferrous sintered alloy for an internal combustion engine, which is characterized in that
と一体焼結結合されたＦｅ基焼結合金のバックアップ層
の２層構造を有する内燃機関の鉄系焼結合金製２層バル
ブシートにして、 上記バルブ当接層を、以下重量％で、 Ｃ：０．４〜２％、 Ｍｏ：２〜１０％、 Ｎｉ：０．５〜３％、 Ｃｒ：１〜６％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する耐摩耗性のすぐ
れたＦｅ基焼結合金で構成し、 上記バックアップ層を、 Ｃ：０．３〜１．２％、 Ｃｒ：１．２〜３．５
％、 Ｍｏ：０．１〜１％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する高温強度のすぐ
れたＦｅ基焼結合金で構成し、 かつ、全体に占める割合で５〜２０％の純銅またはＣｕ
合金を含浸したことを特徴とする内燃機関の鉄系焼結合
金製２層バルブシート。2. A two-layer structure of an iron-based sintered alloy for an internal combustion engine, which has a two-layer structure of a valve contact layer of an Fe-based sintered alloy and a backup layer of an Fe-based sintered alloy integrally sintered and bonded thereto. In the valve seat, the valve contact layer, in the following weight%, C: 0.4 to 2%, Mo: 2 to 10%, Ni: 0.5 to 3%, Cr: 1 to 6%, The backup layer is made of a Fe-based sintered alloy that contains Fe and unavoidable impurities, and has a porosity of 10 to 20% by volume. ~ 1.2%, Cr: 1.2-3.5
%, Mo: 0.1 to 1%, with the balance consisting of Fe and unavoidable impurities, and a high-temperature-strength Fe-based sintered alloy having a porosity of 10 to 20% by volume. , And 5% to 20% of pure copper or Cu
A two-layer valve seat made of an iron-based sintered alloy for an internal combustion engine, which is impregnated with an alloy.
と一体焼結結合されたＦｅ基焼結合金のバックアップ層
の２層構造を有する内燃機関の鉄系焼結合金製２層バル
ブシートにして、 上記バルブ当接層を、以下重量％で、 Ｃ：０．４〜２％、 Ｍｏ：２〜１０％、 Ｎｉ：０．５〜３％、 Ｃｒ：１〜６％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する耐摩耗性のすぐ
れたＦｅ基焼結合金で構成し、 上記バックアップ層を、 Ｃ：０．３〜１．２％、 Ｃｒ：１．２〜３．５
％、 Ｍｏ：０．１〜１％、 を含有し、残りがＦｅと不可避不純物からなる組成、並
びに１０〜２０容量％の空孔率を有する高温強度のすぐ
れたＦｅ基焼結合金で構成し、 かつ、全体に占める割合で５〜２０％の純鉛またはＰｂ
合金を溶浸したことを特徴とする内燃機関の鉄系焼結合
金製２層バルブシート。3. A two-layer structure of an iron-based sintered alloy for an internal combustion engine, which has a two-layer structure of a valve contact layer of an Fe-based sintered alloy and a backup layer of an Fe-based sintered alloy integrally sinter-bonded with the valve contact layer. In the valve seat, the valve contact layer, in the following weight%, C: 0.4 to 2%, Mo: 2 to 10%, Ni: 0.5 to 3%, Cr: 1 to 6%, The backup layer is made of a Fe-based sintered alloy that contains Fe and unavoidable impurities, and has a porosity of 10 to 20% by volume. ~ 1.2%, Cr: 1.2-3.5
%, Mo: 0.1 to 1%, with the balance consisting of Fe and unavoidable impurities, and a high-temperature-strength Fe-based sintered alloy having a porosity of 10 to 20% by volume. , And 5% to 20% of pure lead or Pb in total
A two-layer valve seat made of an iron-based sintered alloy for an internal combustion engine, which is obtained by infiltrating an alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3327132A JP2697429B2 (en) | 1991-11-15 | 1991-11-15 | Two-layer valve seat made of iron-based sintered alloy for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3327132A JP2697429B2 (en) | 1991-11-15 | 1991-11-15 | Two-layer valve seat made of iron-based sintered alloy for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05140701A true JPH05140701A (en) | 1993-06-08 |
| JP2697429B2 JP2697429B2 (en) | 1998-01-14 |
Family
ID=18195673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3327132A Expired - Fee Related JP2697429B2 (en) | 1991-11-15 | 1991-11-15 | Two-layer valve seat made of iron-based sintered alloy for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2697429B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561769A (en) * | 2013-10-11 | 2015-04-29 | 丰田自动车株式会社 | Wear-resistant iron-based sintered metal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4996912A (en) * | 1973-01-20 | 1974-09-13 | ||
| JPS61561A (en) * | 1984-06-12 | 1986-01-06 | Toyota Motor Corp | Sintered alloy material for valve seat |
| JPH03158445A (en) * | 1989-11-16 | 1991-07-08 | Mitsubishi Materials Corp | Valve seat made of fe-base sintered alloy excellent in wear resistance |
-
1991
- 1991-11-15 JP JP3327132A patent/JP2697429B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4996912A (en) * | 1973-01-20 | 1974-09-13 | ||
| JPS61561A (en) * | 1984-06-12 | 1986-01-06 | Toyota Motor Corp | Sintered alloy material for valve seat |
| JPH03158445A (en) * | 1989-11-16 | 1991-07-08 | Mitsubishi Materials Corp | Valve seat made of fe-base sintered alloy excellent in wear resistance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561769A (en) * | 2013-10-11 | 2015-04-29 | 丰田自动车株式会社 | Wear-resistant iron-based sintered metal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2697429B2 (en) | 1998-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2687125B2 (en) | Sintered metal compact used for engine valve parts and its manufacturing method. | |
| JP3952344B2 (en) | Wear-resistant iron-based sintered alloy material for valve seat and valve seat made of iron-based sintered alloy | |
| JPH0313299B2 (en) | ||
| JPH03158445A (en) | Valve seat made of fe-base sintered alloy excellent in wear resistance | |
| JP2002129296A (en) | Iron-base sintered alloy material for valve seat, and valve seat made of iron-base sintered alloy | |
| JP2697429B2 (en) | Two-layer valve seat made of iron-based sintered alloy for internal combustion engine | |
| JP2697430B2 (en) | Two-layer valve seat made of iron-based sintered alloy for internal combustion engine | |
| JPH03158444A (en) | Valve seat made of fe-base sintered alloy excellent in wear resistance | |
| JP2643743B2 (en) | High strength valve seat made of lead impregnated iron-based sintered alloy for internal combustion engine | |
| JPH06179937A (en) | Sintered alloy for valve seat | |
| AU600966B2 (en) | Heat-insulating component and a method of making same | |
| JPH0116905B2 (en) | ||
| JP3331963B2 (en) | Sintered valve seat and method for manufacturing the same | |
| JP2643742B2 (en) | Two-layer valve seat made of lead impregnated iron-based sintered alloy for internal combustion engines | |
| JP2697436B2 (en) | Two-layer forged valve seat made of iron-based sintered alloy for internal combustion engine | |
| JP3254976B2 (en) | Internal-combustion engine tappet member having high joining strength with chip material | |
| JP3346292B2 (en) | High strength Fe-based sintered valve seat | |
| JP2636585B2 (en) | Sintered alloy valve sheet for internal combustion engine | |
| JPH0543914A (en) | Metal packed sintered alloy valve seat for internal combustion engine | |
| JP2643740B2 (en) | Two-layer valve seat made of copper infiltrated iron-based sintered alloy for internal combustion engines | |
| JP3077274B2 (en) | Valve seat made of lead impregnated Fe-based sintered alloy with excellent wear resistance | |
| JP3254909B2 (en) | Internal-combustion engine tappet member having high joining strength with chip material | |
| JPS6125538B2 (en) | ||
| JP2002115513A (en) | Iron group sintered alloy two-layer valve seat and method of its manufacture | |
| JPH07109024B2 (en) | Sintered alloy for valve seat of internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970819 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070919 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080919 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080919 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090919 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 13 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 13 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 13 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313532 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 13 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 13 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110919 Year of fee payment: 14 |
|
| LAPS | Cancellation because of no payment of annual fees |