JP2002069597A - Valve guide material - Google Patents
Valve guide materialInfo
- Publication number
- JP2002069597A JP2002069597A JP2000262319A JP2000262319A JP2002069597A JP 2002069597 A JP2002069597 A JP 2002069597A JP 2000262319 A JP2000262319 A JP 2000262319A JP 2000262319 A JP2000262319 A JP 2000262319A JP 2002069597 A JP2002069597 A JP 2002069597A
- Authority
- JP
- Japan
- Prior art keywords
- machinability
- valve guide
- manganese sulfide
- guide material
- powder
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は内燃機関のバルブ
ガイドに好適な耐摩耗性および被削性，特に後者の優れ
た焼結合金に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintered alloy having excellent wear resistance and machinability, particularly the latter excellent sintered alloy, suitable for a valve guide of an internal combustion engine.
【０００２】[0002]
【従来の技術】内燃機関のバルブガイドには、ねずみ鋳
鉄やボロン鋳鉄などの特殊鋳鉄が用いられることもある
が、鋳鉄の場合は作業環境，量産性，価格面などに問題
があるため、焼結合金での代替が進められてきた。しか
し一般的な焼結合金では耐摩耗性が不充分であり、一
方、合金成分を添加して材質を強化すれば耐摩耗性は使
用可能な水準に達するが、その反面多くの場合被削性
（切削加工性）が低下する。バルブガイドはエンジンの
シリンダーヘッドに組み付け後、リーマ加工によって内
径仕上げを施すので、バルブガイド材の被削性が悪いと
加工の所要時間が長くなったり、工具の摩耗が早まった
りして生産効率が阻害される。2. Description of the Related Art A special cast iron such as gray cast iron or boron cast iron is sometimes used for a valve guide of an internal combustion engine. However, cast iron has problems in working environment, mass productivity, price, etc. Replacement with bond money has been pursued. However, general sintered alloys have insufficient abrasion resistance. On the other hand, if alloy materials are added to strengthen the material, the abrasion resistance reaches a usable level. (Machinability) decreases. After the valve guide is assembled to the cylinder head of the engine, the inner diameter is finished by reaming, so if the machinability of the valve guide material is poor, the processing time will be longer and the tool wear will be faster, resulting in higher production efficiency. Be inhibited.
【０００３】[0003]
【発明が解決しようとする課題】以前、耐摩耗性と被削
性の両立を企図して本出願人が開発したバルブガイド材
（特公昭５５−３４８５８号参照）は、組成が質量比で
Ｃ…１．５〜４％，Ｃｕ…１〜５％，Ｓｎ…０．１〜２
％，Ｐ…０．１〜０．３％未満およびＦｅ残部の焼結合
金であるが、耐摩耗性はボロン鋳鉄より優れ、被削性も
鋳鉄材に比べれば削り難いものの従来の焼結材よりは優
れているため、自動車メーカー各社に広く用いられてき
た。しかるに近年、この分野を取り巻く環境の変化によ
って品質の向上に併せて生産性向上の必要が従来以上に
高まり、バルブガイド材については被削性のより優れた
材料が求められるようになった。The valve guide material (see Japanese Patent Publication No. 55-34858) developed by the present applicant with the aim of achieving both wear resistance and machinability has a composition in terms of mass ratio of C. ... 1.5-4%, Cu ... 1-5%, Sn ... 0.1-2
%, P: Sintered alloy containing less than 0.1 to 0.3% and the balance of Fe. The wear resistance is superior to that of boron cast iron, and the machinability is less than that of cast iron. It has been widely used by automakers because it is better. However, in recent years, due to changes in the environment surrounding this field, the necessity of improving the productivity in addition to the improvement of the quality has increased more than ever, and a material having better machinability has been demanded for the valve guide material.
【０００４】[0004]
【課題を解決するための手段】そこで、上述の先発明に
係るバルブガイド材を基礎としつつその改良を図ったと
ころ、リンの含有量を少なくすると焼結により析出する
Ｆｅ−Ｐ−Ｃ合金相が減少し、同時に遊離黒鉛が増加し
て被削性を向上させるという結果が得られた。この発明
はこの様な知見に基づいてなされたもので、その一つは
リンの含有量を０．０１〜０．１％未満（質量％；以
下、この明細書中の％は、特記しない限り全て質量％で
ある。）の範囲に抑えたことを骨子とし、他の一つはリ
ンの抑制に併せて、頑火輝石（ enstatite；ＭｇＳｉＯ
3 ）と硫化マンガン（ＭｎＳ）とを合計で４％未満添加
したことを骨子とするものである。In view of the above, the present inventors have attempted to improve the above-described valve guide material based on the prior invention, and found that the Fe-PC alloy phase precipitated by sintering when the phosphorus content is reduced is reduced. , And at the same time, the amount of free graphite increased to improve machinability. The present invention has been made based on such findings, and one of them is to reduce the content of phosphorus to 0.01 to less than 0.1% (% by mass; hereinafter, unless otherwise specified,% in this specification refers to The main point is that the content is within the range of mass%.) The other one is enstatite (MgSiO) in conjunction with the suppression of phosphorus.
The main point is that 3 ) and manganese sulfide (MnS) are added in less than 4% in total.
【０００５】即ち第一の発明に係るバルブガイド材は組
成がＣ…１．５〜４％，Ｃｕ…１〜５％，Ｓｎ…０．１
〜２％，Ｐ…０．０１〜０．１％未満およびＦｅ残部の
焼結合金で、その金属組織は、パーライトを主体とする
基地中に遊離黒鉛が分散した状態を呈している。第二の
発明に係るものは、合金の組成がＣ…１．５〜４％，Ｃ
ｕ…１〜５％，Ｓｎ…０．１〜２％，Ｐ…０．０１〜
０．１％未満，頑火輝石と硫化マンガンとの合計で４％
未満およびＦｅ残部で、パーライトを主体とする基地中
に遊離黒鉛，頑火輝石および硫化マンガンが分散した組
織を呈している。なおこれらの合金の基地中には、リン
の含有量に応じてＦｅ−Ｐ−Ｃ系合金相の生成が、ま
た、銅や錫の含有量が多いものではＣｕ−Ｓｎ系合金相
の生成が認められる。従って、上述のパーライトを主体
とする基地には、この様な場合も包含されている。That is, the valve guide material according to the first invention has a composition of C: 1.5 to 4%, Cu: 1 to 5%, and Sn: 0.1.
２2%, P... 0.01 to less than 0.1% and the balance of Fe, and its metal structure shows a state in which free graphite is dispersed in a matrix mainly composed of pearlite. According to the second invention, the composition of the alloy is C ... 1.5-4%, C
u: 1 to 5%, Sn: 0.1 to 2%, P: 0.01 to
Less than 0.1%, 4% in total of bonito and manganese sulfide
Under and below Fe, a structure in which free graphite, pyroxene and manganese sulfide are dispersed in a matrix mainly composed of pearlite is exhibited. In the bases of these alloys, the formation of an Fe-PC-based alloy phase in accordance with the phosphorus content, and the formation of a Cu-Sn-based alloy phase in the case of a high content of copper or tin, occur. Is recognized. Accordingly, the above-described base mainly composed of perlite includes such a case.
【０００６】[0006]
【発明の実施の形態】この発明に係る焼結合金におい
て、炭素は黒鉛粉の形で添加され、一部（概ね０．８〜
１％）は鉄に固溶して基地を強化したり、リンと結合し
て比較的硬質な粒子状のＦｅ−Ｐ−Ｃ系合金相（ステダ
イト相）を生成して分散し、残りが遊離炭素（黒鉛）の
状態で残留して固体潤滑の作用をする。遊離黒鉛の量
は、炭素の含有量（全炭素量）が１．５％の場合に約
０．３％，全炭素量３％で約１．７％であるが、遊離黒
鉛が０．３％より少ない場合にはバルブとの摺動による
バルブガイドの摩耗が大きくなる。このため、炭素の含
有量は１．５％を下限とする。一方、過剰の場合は基材
の強度が低下する上に、粉末成形時に偏析や流動性阻害
などの原因となるため、炭素の含有量は４％を上限とす
る。BEST MODE FOR CARRYING OUT THE INVENTION In a sintered alloy according to the present invention, carbon is added in the form of graphite powder,
1%) forms a solid solution in iron to strengthen the matrix, or combines with phosphorus to form a relatively hard particulate Fe-PC-based alloy phase (steidite phase) and disperse, with the remainder being free It remains in the state of carbon (graphite) and acts as a solid lubricant. The amount of free graphite is about 0.3% when the carbon content (total carbon content) is 1.5%, and is about 1.7% when the carbon content is 3%. %, Wear of the valve guide due to sliding with the valve increases. Therefore, the lower limit of the carbon content is 1.5%. On the other hand, if it is excessive, the strength of the base material is reduced, and it causes segregation and impaired fluidity during powder molding. Therefore, the upper limit of the carbon content is 4%.
【０００７】銅と錫は、通常は錫の含有量が５〜２０％
程度の銅−錫合金粉の形で、またはそれに所要量の単味
粉を追加した形で添加される。共に焼結の進行を速め、
固溶して基地を強化する一方、一部がＣｕ−Ｓｎ系合金
相として残留して摺動特性や被削性を向上させる。この
様な作用は含有量が銅…１％以上，錫…０．１％以上で
生じるが、過剰に加えると焼結時の膨脹によって製品の
寸法安定性が損われ、また錫の場合は基材の脆化を招く
ので、それぞれの含有量は銅…１〜５％，錫…０．１〜
２％に限定される。[0007] Copper and tin usually have a tin content of 5 to 20%.
It is added in the form of a copper-tin alloy powder of a certain degree or in a form to which a required amount of plain powder is added. Both accelerate the progress of sintering,
While forming a solid solution to strengthen the matrix, a part remains as a Cu-Sn-based alloy phase to improve sliding characteristics and machinability. This effect occurs when the content of copper is 1% or more and tin is 0.1% or more. However, if added in excess, the dimensional stability of the product is impaired due to expansion during sintering. Since the material is embrittled, the contents of copper are 1 to 5% and tin is 0.1 to 0.1%.
Limited to 2%.
【０００８】リンはＦｅ−Ｐ合金粉またはＣｕ−Ｐ合金
粉の形で添加される。リンの含有量に応じて、生成され
るステダイト相が増し、基材の剛性が高まり耐摩耗性が
向上するが、その反面被削性は低下する。従って、この
発明の目的は先発明材よりも被削性を向上させることに
あるので、リンの含有量を先発明材より少なく０．１％
未満（但し０．０１％〜）に抑制して遊離黒鉛を増加さ
せ、被削性を向上させる。リンの減量に従い耐摩耗性は
低下するが、それでも、ねずみ鋳鉄に比べれば遥かに優
れた水準にある。[0008] Phosphorus is added in the form of Fe-P alloy powder or Cu-P alloy powder. In accordance with the phosphorus content, the generated steadite phase increases, the rigidity of the base material increases, and the wear resistance improves, but on the other hand, the machinability decreases. Therefore, the object of the present invention is to improve the machinability compared to the prior invention material, so that the content of phosphorus is reduced by 0.1% compared to the prior invention material.
To less than (but 0.01% or less) to increase free graphite and improve machinability. The wear resistance decreases as the phosphorus is reduced, but is still at a much better level than gray cast iron.
【０００９】第二の発明における頑火輝石はメタ珪酸マ
グネシウム鉱物で、斜方晶の粒子で劈開性があり、遊離
黒鉛と同じく固体潤滑剤として作用すると共に被削性を
より改善する。硫化マンガンも同様であるが、更に基材
の耐摩耗性を向上させる作用がある。何れも粉末として
添加されるが、頑火輝石と硫化マンガン（好ましくは頑
火輝石の２〜３割）を混用すると、耐摩耗性と被削性を
その均衡を保ちつつ、一層改善することができる。In the second invention, the pyroxene is a magnesium metasilicate mineral, which is orthorhombic and cleaves, acts as a solid lubricant like free graphite, and further improves machinability. Manganese sulfide is similar, but has the effect of further improving the wear resistance of the substrate. Both are added as powders, but if a mixture of tocopyroxene and manganese sulfide (preferably 20 to 30% of topopyroxene) is used, the abrasion resistance and machinability can be further improved while maintaining the balance.
【００１０】遊離黒鉛も含めこれらの固体潤滑剤は、基
地中に分散して固体潤滑効果を示す反面、含有（分散）
量の増加に従って材料強度を低下させる。そしてこの発
明の場合は含有量が４％を超えるとバルブガイド材とし
て必要な材料強度を保てなくなるので、固体潤滑剤（遊
離黒鉛，頑火輝石および硫化マンガン）の総量を４％以
下とする。これは、例えば全炭素量が１．５％で遊離黒
鉛量が０．７％の場合には、頑火輝石と硫化マンガンを
合計で最大３．３％まで含有させられることを意味して
いる。原料粉末の配合、成形および焼結は粉末冶金の通
常の方法によるが、焼結雰囲気は還元性または浸炭性の
雰囲気が好ましく、焼結温度は高過ぎると遊離黒鉛が消
失するので、９８０〜１１００℃程度が適している。[0010] These solid lubricants, including free graphite, are dispersed in the matrix to exhibit a solid lubricating effect, but contain (disperse)
The material strength decreases as the amount increases. In the case of the present invention, if the content exceeds 4%, the material strength required as a valve guide material cannot be maintained, so that the total amount of the solid lubricant (free graphite, hard pyroxene and manganese sulfide) is set to 4% or less. This means that, for example, when the total carbon content is 1.5% and the free graphite content is 0.7%, up to 3.3% in total of pyroxene and manganese sulfide can be contained. The blending, molding and sintering of the raw material powders are carried out by the usual method of powder metallurgy, but the sintering atmosphere is preferably a reducing or carburizing atmosphere. If the sintering temperature is too high, free graphite disappears. C is suitable.
【００１１】（実施例１） 先ず原料粉として、炭素は
天然黒鉛粉，錫はＣｕ−１０％Ｓｎ合金粉，リンはＦｅ
−２０％Ｐ合金粉，鉄は還元鉄粉，それに粉末潤滑剤と
してステアリン酸亜鉛を用意した。次にこれらを各所定
割合に配合して、全体組成で炭素は一律２％，銅は１％
（従って錫は０．１１％）と５％（錫は０．５５％）の
２種類に固定し、リンは０．０１〜０．３％まで変化さ
せた混合粉（還元鉄粉残部）を作製した。各混合粉と
も、ステアリン酸亜鉛の添加量は一律０．７５％であ
る。(Example 1) First, as raw material powder, carbon is natural graphite powder, tin is Cu-10% Sn alloy powder, and phosphorus is Fe
-20% P alloy powder, iron was reduced iron powder, and zinc stearate was prepared as a powder lubricant. Next, these are blended in predetermined proportions, and the entire composition is uniformly 2% for carbon and 1% for copper.
(Accordingly, tin is fixed at two types, 0.11%) and 5% (tin is 0.55%), and phosphorus is a mixed powder (reduced iron powder residue) changed from 0.01 to 0.3%. Produced. In each of the mixed powders, the addition amount of zinc stearate is uniformly 0.75%.
【００１２】次に各混合粉それぞれを成形圧力４９０Ｍ
Ｐａで所定の形状に成形後、還元性ガス雰囲気中１００
０℃で６０分間焼結して長さ４０ｍｍ，外径１２ｍｍ，
内径７．４ｍｍの円筒状試料多数を作製した。各試料
（焼結材）の合金組織は、基地が密なパーライト組織
で、赤味を帯びたＣｕ−Ｓｎ系合金粒子が点在してい
る。そして、リンの含有量が多い試料では白味を帯びた
Ｆｅ−Ｐ−Ｃ系合金相（ステダイト相）が数多く点在し
ているが、リンの含有量が少ない試料ではそれが減少し
ている。また、リンの含有量が多い（０．３％）試料と
少ない（０．０３％）試料の遊離黒鉛量を、各試料の切
り粉を酸に溶解した不溶解残滓から測定し比較したとこ
ろ、後者の試料では遊離黒鉛が約０．２〜０．３％多く
なっている。Next, each of the mixed powders was formed at a molding pressure of 490M.
After molding into a predetermined shape with Pa
Sintered at 0 ° C for 60 minutes, length 40mm, outer diameter 12mm,
Many cylindrical samples having an inner diameter of 7.4 mm were produced. The alloy structure of each sample (sintered material) is a pearlite structure having a dense matrix, and reddish Cu-Sn-based alloy particles are scattered. In a sample with a high phosphorus content, a lot of whitened Fe-PC-based alloy phases (steadite phases) are scattered, but in a sample with a low phosphorus content, the number decreases. . Further, the amount of free graphite of the sample having a high (0.3%) phosphorus content and the sample of a low (0.03%) phosphorus content were measured from insoluble residues obtained by dissolving the swarf of each sample in an acid, and compared. The latter sample has about 0.2-0.3% more free graphite.
【００１３】次に、かくして得られた各試料について、
被削性および耐摩耗性を試験した。被削性は試料の内径
にリーマ加工を施して軸方向に１０ｍｍ切削するまでの
所要時間を求め、そのデータを、先発明材に相当する銅
…５％，リン…０．３％含有の試料の場合を１００とす
る指数に換算して比較した。従って指数が小さいほど削
り易く加工時間が短くて済むことを、即ち被削性が良い
ことを意味している。また耐摩耗性は、各試料をバルブ
ガイドの所定の形状・寸法に仕上げてエンジン模擬試験
装置に装着し、加熱した状態でラジアル荷重を負荷した
バルブと所定の時間往復摺動させ、試験の前後における
試料の内径寸法差を求めて摩耗量とし、これを比較し
た。Next, for each of the samples thus obtained,
The machinability and wear resistance were tested. The machinability was determined by calculating the time required for reaming the inner diameter of the sample and cutting 10 mm in the axial direction. The data was used for a sample containing 5% of copper and 0.3% of phosphorus corresponding to the material of the present invention. Was converted to an index with the value of 100 as 100 and compared. Therefore, the smaller the index is, the easier the cutting is and the shorter the processing time is, that is, the better the machinability is. For wear resistance, finish each sample to the specified shape and dimensions of the valve guide, mount it on the engine simulation test device, slide it back and forth with the valve loaded with the radial load for a predetermined time in the heated state, before and after the test. , The difference between the inner diameters of the samples was determined as the amount of wear, and this was compared.
【００１４】図面はこれらのデータを整理してグラフ化
したもので、図１はリンの含有量と被削性との関係を，
図２はリンの含有量と耐摩耗性との関係を示している。
このグラフから先ず銅の影響については、銅の含有量１
〜５％の範囲ではリンの含有量に拘らず、被削性，耐摩
耗性ともに銅が多いほど優っていることが分る。次にリ
ンの影響については、リンの含有量を０．３％から減量
するにつれて被削性はほぼ直線的に向上し、その傾向は
従来の下限である０．１％を切っても継続している。従
って被削性向上のためにリンの含有量を０．１％未満に
止めることには充分な意義が認められる。また耐摩耗性
は、リンの抑制の結果先発明材に比べれば摩耗量が若干
増加しているが、それでも例えば銅…１％，リン…０．
０５％の試料の摩耗量８０μｍは実用上許容し得る範囲
にあり、且つ、同一試験条件でのねずみ鋳鉄バルブガイ
ドの摩耗量１７０μｍに比べても遥かに優っている。FIG. 1 is a graph in which these data are arranged and FIG. 1 shows the relationship between the phosphorus content and machinability.
FIG. 2 shows the relationship between the phosphorus content and the wear resistance.
From this graph, first, regarding the influence of copper, the copper content 1
It can be seen that in the range of 〜5%, regardless of the phosphorus content, the machinability and the wear resistance are superior as the amount of copper increases. Next, regarding the influence of phosphorus, as the phosphorus content is reduced from 0.3%, the machinability improves almost linearly, and the tendency continues even if the conventional lower limit of 0.1% is cut. ing. Therefore, it is recognized that keeping the phosphorus content to less than 0.1% for the purpose of improving machinability is sufficiently significant. As for the abrasion resistance, the amount of abrasion is slightly increased as compared with the material of the prior invention as a result of the suppression of phosphorus.
The wear of 80% of the 05% sample is in a practically acceptable range, and is far superior to the wear of the gray cast iron valve guide of 170 μm under the same test conditions.
【００１５】（実施例２） 原料粉は実施例１で用意し
たものを用い、天然黒鉛粉を２％，Ｃｕ−１０％Ｓｎ合
金粉を５％，Ｆｅ−２０％Ｐ合金粉を０．２５％，頑火
輝石粉末０．８％と硫化マンガン粉末０．２％，および
残部還元鉄粉にステアリン酸亜鉛を０．７５％添加した
混合粉を作製した。その全体組成はＣ…２％，Ｃｕ…
４．５％，Ｓｎ…０．５％，Ｐ…０．０５％（ほかに頑
火輝石，硫化マンガン，および鉄残部）である。また、
比較のために上記の配合から頑火輝石粉末と硫化マンガ
ン粉末を省いた混合粉を作製した。(Example 2) As the raw material powder, the powder prepared in Example 1 was used, 2% of natural graphite powder, 5% of Cu-10% Sn alloy powder, and 0.25 of Fe-20% P alloy powder. %, Tonite pyroxene powder 0.8%, manganese sulfide powder 0.2%, and a mixed powder in which 0.75% of zinc stearate was added to the remaining reduced iron powder. The overall composition is C ... 2%, Cu ...
4.5%, Sn: 0.5%, P: 0.05% (other than pyroxene, manganese sulfide, and iron balance). Also,
For comparison, a mixed powder was prepared by omitting the pyroxene powder and the manganese sulfide powder from the above composition.
【００１６】次に、この２種類の混合粉について実施例
１の場合と同じ条件で成形と焼結を行ない、得られた試
料の被削性と耐摩耗性を試験した。その結果は、頑火輝
石と硫化マンガンを含有する前者のデータは被削性指数
…２３，摩耗量…５０μｍであったのに対して、後者の
場合は被削性指数…２５，摩耗量…５５μｍであり、被
削性，耐摩耗性ともに前者の方が良くなっている。両試
料の組織状態を見ると前者の場合には基地中に潤滑性物
質として遊離黒鉛，頑火輝石，硫化マンガンの三者が分
散しているのに対して、後者では遊離黒鉛のみであり、
この差が特性の違いを生じさせたものと考えられる。Next, the two types of mixed powders were molded and sintered under the same conditions as in Example 1, and the obtained samples were tested for machinability and wear resistance. As a result, the former data containing tocopyroxene and manganese sulfide had a machinability index of 23 and a wear amount of 50 μm, while the latter case had a machinability index of 25 and a wear amount of 55 μm. The former is better in both machinability and abrasion resistance. Looking at the microstructures of both samples, in the former case, the free graphite, hard pyroxene, and manganese sulfide were dispersed as lubricating substances in the matrix, whereas in the latter, only the free graphite was dispersed.
It is considered that this difference caused a difference in characteristics.
【００１７】[0017]
【発明の効果】この発明に係るバルブガイド材は、従来
と大差ない耐摩耗性を保ちながら従来以上の被削性を具
えている。従ってエンジンの組み立て工程における作業
条件，使用する工作機械との相性その他種々の関係から
バルブガイド材の被削性が特に重視される場合、この発
明は極めて有益なものである。The valve guide member according to the present invention has machinability higher than that of the conventional one while maintaining wear resistance which is not much different from the conventional one. Therefore, the present invention is extremely useful when the machinability of the valve guide material is particularly emphasized in consideration of the working conditions in the engine assembling process, compatibility with the machine tool to be used, and various other relationships.
【図１】試料のリン含有量と被削性との関係を示すグラ
フである。FIG. 1 is a graph showing the relationship between the phosphorus content of a sample and machinability.
【図２】試料のリン含有量と耐摩耗性との関係を示すグ
ラフである。FIG. 2 is a graph showing the relationship between the phosphorus content of a sample and abrasion resistance.
Claims (3)
％，Ｃｕ…１〜５％，Ｓｎ…０．１〜２％，Ｐ…０．０
１〜０．１％未満およびＦｅ残部で、パーライトを主体
とする基地中に遊離黒鉛が分散した組織を呈することを
特徴とする焼結バルブガイド材。1. The composition of the alloy is C.1.5 to 4 by mass ratio.
%, Cu: 1 to 5%, Sn: 0.1 to 2%, P: 0.0
A sintered valve guide material characterized by exhibiting a structure in which free graphite is dispersed in a matrix mainly composed of pearlite by 1 to less than 0.1% and the balance of Fe.
％，Ｃｕ…１〜５％，Ｓｎ…０．１〜２％，Ｐ…０．０
１〜０．１％未満，頑火輝石と硫化マンガンの合計で４
％未満およびＦｅ残部で、パーライトを主体とする基地
中に遊離黒鉛，頑火輝石および硫化マンガンが分散した
組織を呈することを特徴とする焼結バルブガイド材。2. The alloy composition has a mass ratio of C: 1.5-4.
%, Cu: 1 to 5%, Sn: 0.1 to 2%, P: 0.0
1 to less than 0.1%, 4 in total of bonito and manganese sulfide
A sintered valve guide material characterized by having a structure in which free graphite, encausticite and manganese sulfide are dispersed in a base mainly composed of pearlite, in a content of less than 0.1% and the balance of Fe.
よび硫化マンガンの量が合計４％以下である、請求項２
に記載の焼結バルブガイド材。3. The total amount of free graphite, energite and manganese sulfide dispersed in the base is 4% or less.
2. The sintered valve guide material according to item 1.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000262319A JP4323069B2 (en) | 2000-08-31 | 2000-08-31 | Valve guide material |
| GB0120946A GB2368348B (en) | 2000-08-31 | 2001-08-29 | Material for valve guides |
| US09/943,617 US6616726B2 (en) | 2000-08-31 | 2001-08-30 | Material for valve guides |
| KR10-2001-0052900A KR100420264B1 (en) | 2000-08-31 | 2001-08-30 | Material for valve guides |
| FR0111302A FR2813317B1 (en) | 2000-08-31 | 2001-08-31 | FRITTE ALLOY MATERIAL FOR VALVE GUIDES |
| DE10142645A DE10142645B4 (en) | 2000-08-31 | 2001-08-31 | sintered part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000262319A JP4323069B2 (en) | 2000-08-31 | 2000-08-31 | Valve guide material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002069597A true JP2002069597A (en) | 2002-03-08 |
| JP4323069B2 JP4323069B2 (en) | 2009-09-02 |
Family
ID=18750016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000262319A Expired - Lifetime JP4323069B2 (en) | 2000-08-31 | 2000-08-31 | Valve guide material |
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| Country | Link |
|---|---|
| JP (1) | JP4323069B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1619263A1 (en) | 2004-07-15 | 2006-01-25 | Hitachi Powdered Metals Co., Ltd. | Sintered valve guide and manufacturing method thereof |
| JP2010077515A (en) * | 2008-09-29 | 2010-04-08 | Hitachi Powdered Metals Co Ltd | Method for producing sintered valve guide |
| JP2010189755A (en) * | 2009-02-20 | 2010-09-02 | Jfe Steel Corp | Iron-based powder mixture |
| JP2012092440A (en) * | 2010-09-30 | 2012-05-17 | Hitachi Powdered Metals Co Ltd | Sintered valve guide material and its manufacturing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2436463B1 (en) | 2010-09-30 | 2013-07-10 | Hitachi Powdered Metals Co., Ltd. | Sintered materials for valve guides and production methods therefor |
| US8617288B2 (en) | 2010-09-30 | 2013-12-31 | Hitachi Powdered Metals Co., Ltd. | Sintered material for valve guides and production method therefor |
-
2000
- 2000-08-31 JP JP2000262319A patent/JP4323069B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1619263A1 (en) | 2004-07-15 | 2006-01-25 | Hitachi Powdered Metals Co., Ltd. | Sintered valve guide and manufacturing method thereof |
| JP2010077515A (en) * | 2008-09-29 | 2010-04-08 | Hitachi Powdered Metals Co Ltd | Method for producing sintered valve guide |
| DE102009041940A1 (en) | 2008-09-29 | 2010-07-08 | Hitachi Powdered Metals Co., Ltd., Matsudo | Manufacturing method for sintered valve guide |
| JP2010189755A (en) * | 2009-02-20 | 2010-09-02 | Jfe Steel Corp | Iron-based powder mixture |
| JP2012092440A (en) * | 2010-09-30 | 2012-05-17 | Hitachi Powdered Metals Co Ltd | Sintered valve guide material and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4323069B2 (en) | 2009-09-02 |
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