JPH06158217A - Valve guide member made of fe-based sintered alloy excellent in wear resistance - Google Patents
Valve guide member made of fe-based sintered alloy excellent in wear resistanceInfo
- Publication number
- JPH06158217A JPH06158217A JP33102292A JP33102292A JPH06158217A JP H06158217 A JPH06158217 A JP H06158217A JP 33102292 A JP33102292 A JP 33102292A JP 33102292 A JP33102292 A JP 33102292A JP H06158217 A JPH06158217 A JP H06158217A
- Authority
- JP
- Japan
- Prior art keywords
- sintered alloy
- based sintered
- guide member
- valve guide
- wear resistance
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、すぐれた耐摩耗性を
発揮する内燃機関のＦｅ基焼結合金製バルブガイド部材
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an Fe-based sintered alloy valve guide member for an internal combustion engine that exhibits excellent wear resistance.
【０００２】[0002]
【従来の技術】従来、内燃機関のバルブガイド部材の製
造に、多くのＦｅ基焼結合金が適用されていることは良
く知られるところである。2. Description of the Related Art It is well known that many Fe-based sintered alloys have been conventionally applied to the manufacture of valve guide members for internal combustion engines.
【０００３】[0003]
【発明が解決しようとする課題】一方、近年の内燃機関
の高出力化および高速化はめざましく、これに伴ない、
これの構造部材の使用条件は一段と苛酷さを増し、特に
中心孔に挿通されて往復動するバルブステムとの間では
げしい摺動摩耗を受けるバルブガイド部材には、より一
層の耐摩耗性の向上が要求されるが、従来の多くのＦｅ
基焼結合金製バルブガイド部材はこれに対応できる十分
な耐摩耗性を示すものではなく、すぐれた耐摩耗性を安
定的に発揮するバルブガイド部材の開発が望まれてい
る。On the other hand, in recent years, the high output and high speed of internal combustion engines have been remarkable, and along with this,
The usage conditions of these structural members become even more severe, and especially for valve guide members that are subject to severe sliding wear with the valve stem that is inserted into the center hole and reciprocates, the wear resistance is further improved. Is required, but many conventional Fe
The valve guide member made of a base sintered alloy does not exhibit sufficient wear resistance to cope with this, and development of a valve guide member that stably exhibits excellent wear resistance is desired.
【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、耐摩耗性のすぐれたＦｅ基焼結
合金製バルブガイド部材を開発すべく研究を行なった結
果、内燃機関のバルブガイド部材を、重量％で（以下、
％は重量％を示す）、Ｃ：１〜４％、 Ｃｕ：１．５
〜６％、Ｐ：０．１〜０．８％、 Ｃｒ：０．１〜４
％、Ｍｏ：０．０５〜２％、を含有し、さらに必要に応
じてＭｎ：０．２〜４％、 Ｓ：０．０５〜１％、を
含有し、残りがＦｅと不可避不純物からなる組成、並び
にパーライトを主体とする素地に、微細なＦｅ−Ｃ−Ｐ
系化合物、炭化物、および遊離黒鉛が分散分布し、さら
に加えてＭｎおよびＳを含有する場合には硫化マンガン
（以下、ＭｎＳで示す）が分散分布する組織を有するＦ
ｅ基焼結合金で構成すると、この結果のＦｅ基焼結合金
製バルブガイド部材は、素地に分散する微細な硬質のＦ
ｅ−Ｃ−Ｐ系化合物および炭化物による硬さ向上と、同
じく素地に分散する遊離黒鉛、さらにＭｎＳによる自己
潤滑性の向上とによってすぐれた耐摩耗性を発揮するよ
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 viewpoints, as a result of research to develop a valve guide member made of an Fe-based sintered alloy having excellent wear resistance, the valve guide member of an internal combustion engine is expressed in weight% (hereinafter,
% Represents% by weight), C: 1 to 4%, Cu: 1.5
~ 6%, P: 0.1-0.8%, Cr: 0.1-4
%, Mo: 0.05 to 2%, and optionally Mn: 0.2 to 4%, S: 0.05 to 1%, and the balance Fe and unavoidable impurities. Fine Fe-C-P on the composition and on the basis of pearlite
F having a structure in which a system compound, a carbide, and free graphite are dispersed and distributed, and when Mn and S are additionally contained, manganese sulfide (hereinafter, referred to as MnS) is dispersed and distributed.
When composed of an e-based sintered alloy, the resulting valve guide member made of an Fe-based sintered alloy has a fine, hard F dispersed in the matrix.
We have obtained the research results that excellent wear resistance can be exhibited by improving the hardness by the e-C-P compound and the carbide, and by improving the self-lubricating property by the free graphite which is also dispersed in the matrix and MnS. Of.
【０００５】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、Ｃ：１〜４％、 Ｃｕ：
１．５〜６％、Ｐ：０．１〜０．８％、Ｃｒ：０．１〜
４％、Ｍｏ：０．０５〜２％、を含有し、さらに必要に
応じて、Ｍｎ：０．２〜４％、 Ｓ：０．０５〜１％、
を含有し、残りがＦｅと不可避不純物からなる組成、並
びにパーライトを主体とする素地に、硬質のＦｅ−Ｃ−
Ｐ系化合物、炭化物、および遊離黒鉛、さらに必要に応
じてＭｎＳが分散分布した組織を有するＦｅ基焼結合金
で構成してなる、耐摩耗性のすぐれたＦｅ基焼結合金製
バルブガイド部材に特徴を有するものである。The present invention has been made based on the above-mentioned research results. C: 1 to 4%, Cu:
1.5-6%, P: 0.1-0.8%, Cr: 0.1
4%, Mo: 0.05 to 2%, and if necessary, Mn: 0.2 to 4%, S: 0.05 to 1%,
Containing Fe and the balance consisting of Fe and unavoidable impurities, and a base material mainly composed of pearlite, hard Fe-C-
A valve guide member made of an Fe-based sintered alloy having excellent wear resistance, which is composed of a P-based compound, a carbide, free graphite, and an Fe-based sintered alloy having a structure in which MnS is dispersed and distributed if necessary. It has characteristics.
【０００６】つぎに、この発明のバルブガイド部材にお
いて、これを構成するＦｅ基焼結合金の組成を上記の通
りに限定した理由を説明する。 （ａ） Ｃ Ｃ成分には、素地のパーライトを形成して、これを強化
するほか、硬質のＦｅ−Ｃ−Ｐ系化合物および炭化物を
形成して硬さを向上させ、さらに遊離黒鉛としても素地
に分布して自己潤滑性を改善し、もって部材の耐摩耗性
を向上させる作用があるが、その含有量が１％未満では
前記作用に所望の向上効果が得られず、一方その含有量
が４％を越えると、脆化し、所望の強度を得ることがで
きなくなることから、その含有量を１〜４％と定めた。Next, the reason why the composition of the Fe-based sintered alloy composing the valve guide member of the present invention is limited as described above will be explained. (A) In the CC component, pearlite of the base material is formed and strengthened, and a hard Fe-C-P-based compound and a carbide are formed to improve the hardness, and the base material is also used as free graphite. Has an effect of improving self-lubricating property and thus improving the wear resistance of the member, but if the content is less than 1%, the desired effect of the above effect cannot be obtained, while the content is If it exceeds 4%, it becomes brittle and the desired strength cannot be obtained. Therefore, the content is defined as 1 to 4%.
【０００７】（ｂ） Ｃｕ Ｃｕ成分には、素地に固溶して、これを強化すると共
に、パーライト素地を安定化する作用があるが、その含
有量が１．５％未満では前記作用に所望の改善効果が得
られず、一方その含有量が６％を越えても前記作用によ
り一層の向上効果は得られず、かえって脆化するように
なることから、その含有量を１．５〜６％と定めた。(B) Cu The Cu component has a function of forming a solid solution in the matrix to strengthen it and stabilize the pearlite matrix, but if the content thereof is less than 1.5%, it is desirable for the above-mentioned effect. However, even if the content exceeds 6%, no further improvement effect is obtained due to the above-mentioned action, and rather the material becomes brittle, so the content is 1.5-6. Defined as%.
【０００８】（ｃ） Ｐ Ｐ成分には、焼結性を向上させ、もって強度向上に寄与
するほか、上記の通りＦｅ−Ｃ−Ｐ系化合物を形成して
耐摩耗性を向上させる作用があるが、その含有量が０．
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０．８％を越えると、素地が硬化しすぎると
共に、粗大なＦｅ−Ｃ−Ｐ系化合物が析出するようにな
って被削性が著しく悪化することから、その含有量を
０．１〜０．８％と定めた。(C) The P P component not only improves the sinterability and thus contributes to the strength improvement, but also has the action of forming a Fe--C--P compound as described above to improve the wear resistance. However, its content is 0.
If it is less than 1%, the desired effect cannot be obtained, while if its content exceeds 0.8%, the base material is excessively hardened and coarse Fe—C—P-based compounds are precipitated. Since the machinability deteriorates remarkably, the content thereof is set to 0.1 to 0.8%.
【０００９】（ｄ） Ｃｒ Ｃｒ成分には、素地に固溶して耐熱性を向上させるほ
か、炭化物を形成して硬さを向上させる作用があるが、
その含有量が０．１％未満では前記作用に所望の向上効
果が得られず、一方その含有量が４％を越えると急激に
靭性が低下するようになることから、その含有量を０．
１〜４％と定めた。(D) Cr The Cr component has the function of forming a solid solution in the matrix to improve the heat resistance and also forming a carbide to improve the hardness.
If the content is less than 0.1%, the desired improvement effect on the above-mentioned action cannot be obtained, while if the content exceeds 4%, the toughness is rapidly reduced, so the content is set to 0.
It was set at 1 to 4%.
【００１０】（ｅ） Ｍｏ Ｍｏ成分には、素地に固溶して、これを強化するほか、
炭化物を形成して硬さを向上させる作用があるが、その
含有量が０．０５％未満では前記作用に所望の向上効果
が得られず、一方その含有量が２％を越えると被削性が
低下するようになることから、その含有量を０．０５〜
２％と定めた。(E) Mo Mo The Mo component is solid-solved in the base material to strengthen it, and
Although it has the effect of forming carbides to improve the hardness, if the content is less than 0.05%, the desired improvement effect cannot be obtained, while if the content exceeds 2%, machinability is increased. The content of 0.05-
It was set at 2%.
【００１１】（ｆ） ＭｎおよびＳ これら両成分は、主として素地に分散分布するＭｎＳと
して存在して自己潤滑性を高め、もって部材の耐摩耗性
向上に寄与するほか、被削性を改善する作用をもつの
で、必要に応じて含有されるが、その含有量がそれぞれ
Ｍｎ：０．２％未満およびＳ：０．０５％未満では、素
地への僅かな固溶は避けられないので、ＭｎＳとしての
割合が０．２％未満となってしまい、前記作用に所望の
効果が得られず、一方その含有量がそれぞれＭｎ：４％
およびＳ：１％を越えると、ＭｎＳの分布割合が多くな
りすぎてしまい、この結果部材の強度が低下するように
なることから、その含有量をＭｎ：０．２〜４％、Ｓ：
０．０５〜１％と定めた。(F) Mn and S Both of these components are present mainly as MnS dispersedly distributed in the base material to enhance self-lubricating property, thereby contributing to the improvement of wear resistance of the member and the action of improving machinability. However, if the content of Mn is less than 0.2% and the content of S is less than 0.05%, a slight solid solution in the matrix is unavoidable. Of less than 0.2%, the desired effect cannot be obtained in the above-mentioned action, while the content of each is Mn: 4%.
If the content of S and S exceeds 1%, the distribution ratio of MnS becomes too large, and as a result, the strength of the member decreases. Therefore, the content of Mn is 0.2 to 4% and S:
It was set at 0.05 to 1%.
【００１２】[0012]
【実施例】つぎに、この発明のバルブガイド部材を実施
例により具体的に説明する。原料粉末として、粒度：−
８０meshのＦｅ粉末、同−１５０meshの炭素粉末、同−
１００meshのＣｕ粉末、同−１５０meshのＦｅ−２７％
Ｐ合金粉末、同−２００meshのＣｕ−８％Ｐ合金粉末、
いずれも−１００meshの粒度をもち、ＣｒおよびＭｏの
含有量を種々変化させた各種のアトマイズＦｅ−Ｃｒ−
Ｍｏ合金粉末、さらに−１５０meshのＭｎＳ粉末を用意
し、これら原料粉末を、表１，２に示される配合組成に
配合し、１％のステアリン酸亜鉛を加えてＶ型ミキサに
て３０分間混合した後、６ton ／cm2 の圧力で圧粉体に
プレス成形し、この圧粉体を、天然ガスの分解ガス雰囲
気中、温度：６５０℃に２０分間保持して脱脂し、引続
いて１０５０〜１１５０℃の範囲内の所定温度に昇温
し、この温度に６０分間保持して焼結し、焼結後、仕上
切削加工を施すことにより、実質的に配合組成と同じ成
分組成を有すると共に、パーライトを主体とする素地
に、硬質のＦｅ−Ｃ−Ｐ系化合物、炭化物、および遊離
黒鉛が分散分布し、さらに必要に応じてこれに加えてＭ
ｎＳが分散分布した組織を有するＦｅ基焼結合金で構成
され、かつ長さ：５０mm×外径：１２mm×内径：６．６
mmの寸法をもった本発明Ｆｅ基焼結合金製バルブガイド
部材（以下、本発明焼結バルブガイドという）１〜１
７、並びに構成成分のうちのいずれかの成分含有量（表
２に＊印を付す）がこの発明の範囲から外れたＦｅ基焼
結合金で構成された比較Ｆｅ基焼結合金製バルブガイド
部材（以下、比較焼結バルブガイドという）１〜５をそ
れぞれ製造した。EXAMPLES Next, the valve guide member of the present invention will be specifically described by way of examples. As raw material powder, particle size:-
80mesh Fe powder, same-150mesh carbon powder, same-
Cu powder of 100 mesh, Fe-27% of -150 mesh
P alloy powder, Cu-8% P alloy powder of the same -200 mesh,
All of them have a particle size of -100 mesh and various atomized Fe-Cr- with various contents of Cr and Mo.
Mo alloy powder and -150 mesh MnS powder were prepared, these raw material powders were compounded to the compounding compositions shown in Tables 1 and 2, and 1% zinc stearate was added and mixed in a V-type mixer for 30 minutes. After that, the green compact was press-molded at a pressure of 6 ton / cm 2 , and the green compact was kept at a temperature of 650 ° C. for 20 minutes in an atmosphere of decomposition gas of natural gas for degreasing, and subsequently 1050 to 1150. By raising the temperature to a predetermined temperature within the range of ℃, holding the temperature for 60 minutes to sinter, and performing finish cutting after sintering, it has substantially the same composition as the composition and at the same time, pearlite. A hard Fe—C—P-based compound, a carbide, and free graphite are dispersed and distributed in a base material mainly composed of
It is composed of a Fe-based sintered alloy having a structure in which nS is dispersed and distributed, and has a length of 50 mm, an outer diameter of 12 mm, and an inner diameter of 6.6.
Fe-based sintered alloy valve guide member of the present invention having a dimension of mm (hereinafter referred to as the present invention sintered valve guide) 1-1.
7 and a comparative Fe-based sintered alloy valve guide member composed of an Fe-based sintered alloy in which the content of any one of the constituents (marked with * in Table 2) is out of the range of the present invention. 1 to 5 (hereinafter, referred to as comparative sintering valve guides) were manufactured.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】ついで、この結果得られた各種の焼結バル
ブガイドを、排気量：２０００ccのＤＯＨＣ型エンジン
のＡｌ鋳物製シリンダヘッドに圧入取付けし、燃料とし
て無鉛ガソリンを用い、回転数：６０００r.p.m.で２５
０時間運転の実機試験を行ない、バルブシート側の端縁
から長さ方向５mmの内面位置での内径を測定し、試験前
の内径に対する試験後の内径変化量を摩耗量として測定
した。これらの測定結果を表１，２に示した。Then, various sintered valve guides obtained as a result were press-fitted and attached to an Al cast cylinder head of a DOHC type engine having a displacement of 2000 cc, unleaded gasoline was used as a fuel, and a rotation speed was 6000 rpm. 25
An actual machine test of 0 hour operation was performed to measure the inner diameter at the inner surface position of 5 mm in the longitudinal direction from the edge on the valve seat side, and the change in inner diameter after the test with respect to the inner diameter before the test was measured as the wear amount. The measurement results are shown in Tables 1 and 2.
【００１６】[0016]
【発明の効果】表１，２に示される結果から、本発明焼
結バルブガイド１〜１７は、いずれも著しく高速にして
長時間の連続運転にもかかわらず、すぐれた耐摩耗性を
示すのに対して、比較焼結バルブガイド１〜５に見られ
るように、これを構成するＦｅ基焼結合金の構成成分の
うちのいずかの成分含有量がこの発明の範囲から外れる
と所望のすぐれた耐摩耗性を確保することができないこ
とが明らかである。上述のように、この発明のＦｅ基焼
結合金製バルブガイド部材は、苛酷な条件下での使用に
際してもすぐれた耐摩耗性を発揮し、内燃機関の高性能
化および高速化に十分対応できる特性をもつものであ
る。From the results shown in Tables 1 and 2, all of the sintered valve guides 1 to 17 of the present invention show excellent wear resistance in spite of extremely high speed and continuous operation for a long time. On the other hand, as can be seen in the comparative sintered valve guides 1 to 5, it is desirable that the content of any one of the constituent components of the Fe-based sintered alloy forming the guide is out of the range of the present invention. It is clear that excellent wear resistance cannot be ensured. As described above, the Fe-based sintered alloy valve guide member of the present invention exhibits excellent wear resistance even when used under severe conditions, and can sufficiently cope with higher performance and higher speed of the internal combustion engine. It has characteristics.
Claims (2)
びにパーライトを主体とする素地に、硬質のＦｅ−Ｃ−
Ｐ系化合物、炭化物および遊離黒鉛が分散分布した組織
を有するＦｅ基焼結合金で構成したことを特徴とする耐
摩耗性のすぐれたＦｅ基焼結合金製バルブガイド部材。1. By weight%, C: 1 to 4%, Cu: 1.5 to 6%, P: 0.1 to 0.8%, Cr: 0.1 to 4%, Mo: 0.05. 2% by weight, the balance being Fe and unavoidable impurities, and a base material mainly composed of pearlite, and hard Fe-C-
A valve guide member made of an Fe-based sintered alloy having excellent wear resistance, characterized by being composed of an Fe-based sintered alloy having a structure in which a P-based compound, a carbide and free graphite are dispersed and distributed.
びにパーライトを主体とする素地に、硬質のＦｅ−Ｃ−
Ｐ系化合物、炭化物、遊離黒鉛、および硫化マンガンが
分散分布した組織を有するＦｅ基焼結合金で構成したこ
とを特徴とする耐摩耗性のすぐれたＦｅ基焼結合金製バ
ルブガイド部材。2. C: 1-4% by weight, Cu: 1.5-6%, P: 0.1-0.8%, Cr: 0.1-4%, Mo: 0.05- 2%, Mn: 0.2 to 4%, S: 0.05 to 1%, with the balance consisting of Fe and unavoidable impurities, and a base body mainly composed of pearlite, and a hard Fe-C-
A valve guide member made of an Fe-based sintered alloy having excellent wear resistance, which is composed of an Fe-based sintered alloy having a structure in which a P-based compound, a carbide, free graphite, and manganese sulfide are dispersed and distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33102292A JPH06158217A (en) | 1992-11-17 | 1992-11-17 | Valve guide member made of fe-based sintered alloy excellent in wear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33102292A JPH06158217A (en) | 1992-11-17 | 1992-11-17 | Valve guide member made of fe-based sintered alloy excellent in wear resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06158217A true JPH06158217A (en) | 1994-06-07 |
Family
ID=18238953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33102292A Pending JPH06158217A (en) | 1992-11-17 | 1992-11-17 | Valve guide member made of fe-based sintered alloy excellent in wear resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06158217A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010057554A (en) * | 1999-12-31 | 2001-07-04 | 이계안 | A sintered alloy composition for valve guide |
| KR20020056055A (en) * | 2000-12-29 | 2002-07-10 | 이계안 | Sintered material for valve guide |
| EP3296418A1 (en) * | 2016-09-16 | 2018-03-21 | Toyota Jidosha Kabushiki Kaisha | Manufacturing method of wear-resistant iron-based sintered alloy and wear-resistant iron-based sintered alloy |
-
1992
- 1992-11-17 JP JP33102292A patent/JPH06158217A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010057554A (en) * | 1999-12-31 | 2001-07-04 | 이계안 | A sintered alloy composition for valve guide |
| KR20020056055A (en) * | 2000-12-29 | 2002-07-10 | 이계안 | Sintered material for valve guide |
| EP3296418A1 (en) * | 2016-09-16 | 2018-03-21 | Toyota Jidosha Kabushiki Kaisha | Manufacturing method of wear-resistant iron-based sintered alloy and wear-resistant iron-based sintered alloy |
| CN107829015A (en) * | 2016-09-16 | 2018-03-23 | 丰田自动车株式会社 | The manufacture method and wearability iron-base sintered alloy of wearability iron-base sintered alloy |
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