JP3257196B2 - Iron-based sintered alloy for sliding members with excellent strength and wear resistance - Google Patents
Iron-based sintered alloy for sliding members with excellent strength and wear resistanceInfo
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- JP3257196B2 JP3257196B2 JP28177393A JP28177393A JP3257196B2 JP 3257196 B2 JP3257196 B2 JP 3257196B2 JP 28177393 A JP28177393 A JP 28177393A JP 28177393 A JP28177393 A JP 28177393A JP 3257196 B2 JP3257196 B2 JP 3257196B2
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- iron
- based sintered
- wear resistance
- sintered alloy
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Description
【０００１】[0001]
【産業上の利用分野】この発明は、強度および耐摩耗性
に優れた摺動部材用鉄基焼結合金に関するものであり、
この摺動部材用鉄基焼結合金はカムロブ、バルブガイ
ド、ガイドブッシュなどの内燃機関の摺動構造部材とし
て用いられるだけでなく、その他の各種の摺動駆動装置
の摺動構造部材として用いられるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron-based sintered alloy for a sliding member having excellent strength and wear resistance.
This iron-based sintered alloy for a sliding member is used not only as a sliding structure member of an internal combustion engine such as a cam lobe, a valve guide, and a guide bush, but also as a sliding structure member of various other sliding drive devices. Things.
【０００２】[0002]
【従来の技術】従来、例えば、特公平３−７９４２８号
公報に記載されるような耐摩耗性に優れた摺動部材用鉄
基焼結合金は知られており、この摺動部材用鉄基焼結合
金は各種の摺動構造部材として用いられている。この従
来の摺動部材用鉄基焼結合金はＣ：１．９〜２．５重量
％、Ｓｉ：０．５〜３．０重量％、Ｐ：０．２〜０．６
重量％を必須成分とし、さらにＭｎ：０．０５〜１．５
重量％、Ｃｕ：１．０〜４．０重量％のうち１種もしく
は２種、またはＮｉ、Ｍｏ、Ｃｒのうち１種もしくは２
種以上：０．１〜２．０重量％を含有し、残りがＦｅお
よび不可避不純物からなる組成を有するものである。2. Description of the Related Art Conventionally, an iron-based sintered alloy for a sliding member having excellent wear resistance as disclosed in Japanese Patent Publication No. 3-79428 has been known. Sintered alloys are used as various sliding structural members. This conventional iron-based sintered alloy for a sliding member has C: 1.9 to 2.5% by weight, Si: 0.5 to 3.0% by weight, and P: 0.2 to 0.6%.
Weight% as an essential component, and Mn: 0.05 to 1.5
% By weight, Cu: 1.0 to 4.0% by weight, 1 or 2 types, or Ni, Mo, Cr, 1 or 2 types
Species or more: Contains 0.1 to 2.0% by weight, with the remainder having a composition consisting of Fe and unavoidable impurities.
【０００３】[0003]
【発明が解決しようとする課題】しかし、最近の内燃機
関などに内蔵されている各種摺動駆動装置は、高性能化
および高負荷化にともない、従来よりも一段と苛酷な条
件で作動し、このため、上記内燃機関などの各種摺動駆
動装置の摺動構造部材は、従来よりも一層の強度と耐摩
耗性が要求されている。ところが上記従来の摺動部材用
鉄基焼結合金は一段と苛酷な条件に対して十分に満足で
きるものではなかった。However, various sliding drive devices built in recent internal combustion engines and the like have been operated under severer conditions than in the past due to higher performance and higher load. Therefore, sliding structural members of various sliding driving devices such as the internal combustion engine are required to have higher strength and wear resistance than ever before. However, the conventional iron-based sintered alloys for sliding members described above have not been sufficiently satisfactory under severer conditions.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者らは、
上述のような観点から、各種摺動駆動装置の摺動構造部
材として用いた場合に、従来よりも一層優れた強度およ
び耐摩耗性を有する摺動部材用鉄基焼結合金を得るべく
研究を行った結果、Ｎｉ：１．０〜４．０重量％、Ｓ
ｉ：１．０〜３．０重量％、Ｃ：１．０〜１．８重量％
を含有し、さらに、必要に応じて、Ｎｂ：０．０２〜
０．１０重量％またはＢ：０．０００３〜０．００３重
量％を含有し、残りがＦｅおよび不可避不純物からなる
組成を有し、さらに、合金素地中に最大粒径：１００μ
ｍ以下の黒鉛が分散した組織をを有する摺動部材用鉄基
焼結合金は、従来よりも一層強度および耐摩耗性に優れ
ているという知見を得たのである。Means for Solving the Problems Accordingly, the present inventors have:
From the above-mentioned viewpoints, research was conducted to obtain iron-based sintered alloys for sliding members having higher strength and wear resistance than conventional products when used as sliding structural members for various sliding drive devices. As a result, Ni: 1.0 to 4.0% by weight, S
i: 1.0 to 3.0% by weight, C: 1.0 to 1.8% by weight
And further, if necessary, Nb: 0.02 to
0.10% by weight or B: 0.0003 to 0.003% by weight, with the balance being Fe and unavoidable impurities.
It has been found that an iron-based sintered alloy for a sliding member having a structure in which graphite of m or less is dispersed is more excellent in strength and wear resistance than before.
【０００５】この発明は、かかる知見にもとづいて成さ
れたものであって、Ｎｉ：１．０〜４．０重量％、Ｓ
ｉ：１．０〜３．０重量％、Ｃ：１．０〜１．８重量％
を含有し、さらに、必要に応じて、Ｎｂ：０．０２〜
０．１０重量％またはＢ：０．０００３〜０．００３重
量％を含有し、残りがＦｅおよび不可避不純物からなる
組成、並びに素地中に最大粒径：１００μｍ以下の黒鉛
が分散し不純物からなる組成、並びに素地中に最大粒
径：１００μｍ以下の黒鉛が分散した組織を有する摺動
部材用鉄基焼結合金に特徴を有するものである。[0005] The present invention has been made based on this finding, and is characterized by the following: Ni: 1.0 to 4.0% by weight;
i: 1.0 to 3.0% by weight, C: 1.0 to 1.8% by weight
And further, if necessary, Nb: 0.02 to
0.10% by weight or B: 0.0003 to 0.003% by weight, the balance being Fe and unavoidable impurities, and a composition in which graphite having a maximum particle size of 100 μm or less is dispersed and impurities in a base material. And an iron-based sintered alloy for a sliding member having a structure in which graphite having a maximum particle size of 100 μm or less is dispersed in a base material.
【０００６】つぎに、この発明の摺動部材用鉄基焼結合
金の成分組成および組織を上記のごとく限定した理由に
ついて説明する。Next, the reason why the component composition and the structure of the iron-based sintered alloy for a sliding member of the present invention are limited as described above will be described.
【０００７】（ａ）Ｎｉ Ｎｉは、素地を強化し、焼結性および焼き入れ性を高
め、摺動部材用鉄基焼結合金の高温度における強度およ
び靭性を向上させる作用があるが、その含有量が１．０
重量％未満では効果が十分でなく、一方、４．０重量％
を越えて含有すると残留オーステナイトを生成させ、素
地組織の不均一を生じさせるので好ましくない。 した
がって、Ｎｉの含有量は、１．０〜４．０重量％に定め
た。(A) Ni Ni has the effect of strengthening the base, improving the sinterability and hardenability, and improving the strength and toughness of the iron-based sintered alloy for sliding members at high temperatures. Content is 1.0
If the amount is less than 40% by weight, the effect is not sufficient.
If the content exceeds the above range, retained austenite is generated, and the base structure becomes uneven, which is not preferable. Therefore, the content of Ni is set to 1.0 to 4.0% by weight.
【０００８】（ｂ）Ｓｉ Ｓｉは、素地を強化する効果と、黒鉛化を促進し界面へ
の粗大炭化物の析出を抑制させる効果があるが、その含
有量が１．０重量％未満では効果が十分でなく、一方、
２．０重量％を越えて含有すると圧粉成形時の成形性や
焼結性を低下させ、また材料を脆化させるので好ましく
ない。(B) Si Si has the effect of strengthening the substrate and the effect of promoting graphitization and suppressing the precipitation of coarse carbides at the interface. However, when the content is less than 1.0% by weight, the effect is low. Not enough,
If the content exceeds 2.0% by weight, the moldability and sinterability at the time of compacting are reduced, and the material is embrittled.
【０００９】したがって、Ｓｉの含有量は、１．０〜
２．０重量％に定めた。Therefore, the content of Si is 1.0 to
It was set to 2.0% by weight.
【００１０】（ｃ）Ｃ Ｃには、酸素量の低減、液相発生温度の低下による焼結
促進効果、素地への固溶並びに遊離黒鉛および炭化物の
生成による耐摩耗性と強度の向上効果があるが、その含
有量が１．０重量％未満では効果が十分でなく、一方、
１．８重量％を越えて含有すると材料を脆化させるので
好ましくない。(C) C C has the effect of reducing the amount of oxygen, accelerating sintering by lowering the liquid phase generation temperature, improving the wear resistance and strength by dissolving in the base material and generating free graphite and carbide. However, if the content is less than 1.0% by weight, the effect is not sufficient.
If the content exceeds 1.8% by weight, the material becomes brittle, which is not preferable.
【００１１】したがって、Ｃの含有量は、１．０〜１．
８重量％に定めた。Therefore, the content of C is 1.0-1.
It was set to 8% by weight.
【００１２】（ｄ）Ｎｂ Ｎｂには、合金の強度および靭性を向上させる効果があ
るが、その含有量が０．０２重量％未満では効果が十分
でなく、一方、０．１０重量％を越えて含有させても十
分な効果が得られない。したがって、Ｎｂの含有量は、
０．０２〜０．１０重量％に定めた。(D) Nb Nb has the effect of improving the strength and toughness of the alloy. However, if the content is less than 0.02% by weight, the effect is not sufficient. On the other hand, Nb exceeds 0.10% by weight. However, sufficient effects cannot be obtained even if they are contained. Therefore, the content of Nb is
It was determined to be 0.02 to 0.10% by weight.
【００１３】（ｅ）Ｂ Ｂには、合金の強度および靭性を向上させる効果がある
が、その含有量が０．０００３重量％未満では効果が十
分でなく、一方、０．００３重量％を越えて含有させて
も十分な効果が得られない。したがって、Ｂの含有量
は、０．０００３〜０．００３重量％に定めた。(E) BB B has the effect of improving the strength and toughness of the alloy. However, if the content is less than 0.0003% by weight, the effect is not sufficient, while the content exceeds 0.003% by weight. However, sufficient effects cannot be obtained even if they are contained. Therefore, the content of B is set to 0.0003 to 0.003% by weight.
【００１４】（ｆ）黒鉛の最大粒径 この発明の摺動部材用鉄基焼結合金素地中に黒鉛が分散
した組織を有すると、固体潤滑剤として作用し、耐摩耗
性を一層向上させる作用を有するが、その最大粒径が１
００μｍを越えると、強度が低下するので好ましくな
い。したがって、摺動部材用鉄基焼結合金素地中に分散
した黒鉛の最大粒径は１００μｍ以下に定めた。(F) Maximum particle size of graphite If the iron-based sintered alloy body for a sliding member of the present invention has a structure in which graphite is dispersed, it acts as a solid lubricant and further improves wear resistance. Having a maximum particle size of 1
If it exceeds 00 μm, the strength is undesirably reduced. Therefore, the maximum particle size of the graphite dispersed in the iron-based sintered alloy body for the sliding member was set to 100 μm or less.
【００１５】[0015]
【実施例】原料粉末として、いずれも１〜１００μｍの
範囲内の平均粒径を有するＦｅ粉末、Ｎｉ粉末、Ｆｅ−
Ｓｉ粉末、Ｃ粉末、Ｎｂ粉末、Ｂ粉末およびＦｅ−Ｐ粉
末をそれぞれ用意し、これら原料粉末を配合し、十分に
混合し、得られた混合粉末を６ｔｏｎ／ｃｍ2 の圧力で
２５ｍｍ×１０ｍｍ×５ｍｍの寸法を有する形状に金型
圧粉成形し、得られた金型圧粉成形体を１２００℃で１
時間、真空雰囲気中で焼結したのち、焼き入れ、焼戻し
を行い、表１〜表２に示される組成の本発明摺動部材用
鉄基焼結合金（以下、本発明鉄基焼結合金という）１〜
１４、比較摺動部材用鉄基焼結合金（以下、比較鉄基焼
結合金という）１〜７および従来摺動部材用鉄基焼結合
金（以下、従来鉄基焼結合金という）を作製した。EXAMPLES As raw material powders, Fe powder, Ni powder, Fe-
Si powder, C powder, Nb powder, B powder and Fe-P powder were prepared respectively, these raw material powders were blended and mixed well, and the obtained mixed powder was 25 mm × 10 mm × at a pressure of 6 ton / cm 2. The powder compact was molded into a shape having a dimension of 5 mm, and the obtained compact was pressed at 1200 ° C. for 1 hour.
After sintering in a vacuum atmosphere for a time, quenching and tempering are performed, and the iron-based sintered alloy for a sliding member of the present invention having the composition shown in Tables 1 and 2 (hereinafter referred to as the iron-based sintered alloy of the present invention) ) 1
14. Production of iron-based sintered alloys for comparative sliding members (hereinafter referred to as comparative iron-based sintered alloys) 1 to 7 and iron-based sintered alloys for conventional sliding members (hereinafter referred to as conventional iron-based sintered alloys) did.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】これら本発明鉄基焼結合金１〜１４、比較
鉄基焼結合金１〜７および従来鉄基焼結合金を金属顕微
鏡により組織観察し、素地中に析出している黒鉛の最大
粒径を測定し、その結果を表３〜表４に示した。The structures of the iron-based sintered alloys 1 to 14 of the present invention, comparative iron-based sintered alloys 1 to 7 and conventional iron-based sintered alloys were observed with a metallographic microscope, and the maximum grain size of graphite precipitated in the substrate was observed. The diameter was measured, and the results are shown in Tables 3 and 4.
【００１９】さらに、ＩＳＯ３３２５に基ずく条件の抗
折試験を行い、抗折力を測定し、その結果も表３〜表４
に示した。Further, a bending test under the conditions based on ISO3325 was performed, and the bending force was measured.
It was shown to.
【００２０】次に、ブロック・オン・リング型摩耗試験
を行うために試験片として、本発明鉄基焼結合金１〜１
４、比較鉄基焼結合金１〜７および従来鉄基焼結合金か
らなる縦：１０ｍｍ、横：１０ｍｍ、長さ：５５ｍｍの
寸法を有するブロックを作製し、さらに、ブロック・オ
ン・リング型摩耗試験の相手材として、ＳＣＭ４３５か
らなる外径：４０ｍｍ、内径：３０ｍｍ、厚さ：１５ｍ
ｍの寸法を有するリングを用意した。上記ブロックおよ
びリングを用い、図１に示されるように、ブロック１を
リング２に接するように組合わせ、リング２の周囲に潤
滑油として冷凍機油を塗布した後、ブロック１に荷重：
２０Ｋｇをかけ、リング２を摺動速度：３．５ｍ／秒で
回転せしめ、荷重負荷時間１２０分におけるリング２の
摩耗量を測定するブロック・オン・リング型摩耗試験を
実施し、その摩耗量の測定値を表３〜表４に示した。Next, the iron-based sintered alloys 1 to 1 of the present invention were used as test pieces for performing a block-on-ring type wear test.
4. A block made of comparative iron-based sintered alloys 1 to 7 and a conventional iron-based sintered alloy having dimensions of 10 mm in length, 10 mm in width, and 55 mm in length is manufactured, and further, block-on-ring type wear As a test partner, outer diameter: 40 mm, inner diameter: 30 mm, thickness: 15 m made of SCM435
A ring having a dimension of m was prepared. Using the block and the ring, as shown in FIG. 1, the block 1 is assembled so as to be in contact with the ring 2, and refrigeration oil is applied around the ring 2 as a lubricating oil.
The ring 2 was rotated at a sliding speed of 3.5 m / sec by applying 20 kg, and a block-on-ring type wear test for measuring the amount of wear of the ring 2 at a load application time of 120 minutes was performed. The measured values are shown in Tables 3 and 4.
【００２１】[0021]
【表３】 [Table 3]
【００２２】[0022]
【表４】 [Table 4]
【００２３】[0023]
【発明の効果】表１〜表４に示した結果から、本発明鉄
基焼結合金１〜１４は、いずれも従来鉄基焼結合金に比
べて、一段と優れた抗折力および耐摩耗性を有し、また
比較鉄基焼結合金１〜７に見られるように、この発明の
範囲または条件から外れると、抗折力または耐摩耗性の
うち少なくともいずれかの性質が劣ったものとなること
が明らかである。From the results shown in Tables 1 to 4, all of the iron-based sintered alloys 1 to 14 of the present invention have much higher bending strength and wear resistance than the conventional iron-based sintered alloys. And, as seen in the comparative iron-based sintered alloys 1 to 7, when deviating from the scope or conditions of the present invention, at least one of the transverse rupture strength and the wear resistance becomes inferior. It is clear that.
【００２４】上述のように、この発明の摺動部材用鉄基
焼結合金は、抗折力および耐摩耗性がともに優れている
ので、高出力内燃機関の構造部材として十分に対応する
ことができ、実用に際しては、優れた性能を長期にわた
って発揮することにより工業上優れた効果をもたらすも
のである。As described above, the iron-based sintered alloy for a sliding member according to the present invention is excellent in both the transverse rupture strength and the wear resistance, so that it can be adequately used as a structural member of a high-output internal combustion engine. In practical use, it exerts industrially superior effects by exhibiting excellent performance over a long period of time.
【図１】ブロック・オン・リング型摩耗試験の説明図で
ある。FIG. 1 is an explanatory diagram of a block-on-ring type wear test.
１…ブロック ２…リング 1… Block 2… Ring
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−145151（ＪＰ，Ａ) 特開 昭60−33343（ＪＰ，Ａ) 特開 昭55−145156（ＪＰ，Ａ) 特開 昭52−19106（ＪＰ，Ａ) 特開 平３−82743（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 38/00 304 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-145151 (JP, A) JP-A-60-33343 (JP, A) JP-A-55-145156 (JP, A) JP-A 52-145 19106 (JP, A) JP-A-3-82743 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C22C 38/00 304
Claims (3)
１．０〜３．０重量％、Ｃ：１．０〜１．８重量％を含
有し、残りがＦｅおよび不可避不純物からなる組成、並
びに素地中に最大粒径：１００μｍ以下の黒鉛が分散し
た組織を有することを特徴とする強度および耐摩耗性に
優れた摺動部材用鉄基焼結合金。1. Ni: 1.0 to 4.0% by weight, Si:
A composition containing 1.0 to 3.0% by weight and C: 1.0 to 1.8% by weight, the balance being Fe and unavoidable impurities, and graphite having a maximum particle size of 100 μm or less dispersed in the base material. An iron-based sintered alloy for a sliding member having a structure and excellent in strength and wear resistance.
１．０〜３．０重量％、Ｃ：１．０〜１．８重量％、Ｎ
ｂ：０．０２〜０．１０重量％を含有し、残りがＦｅお
よび不可避不純物からなる組成、並びに素地中に最大粒
径：１００μｍ以下の黒鉛が分散した組織を有すること
を特徴とする強度および耐摩耗性に優れた摺動部材用鉄
基焼結合金。2. Ni: 1.0 to 4.0% by weight, Si:
1.0 to 3.0% by weight, C: 1.0 to 1.8% by weight, N
b: a composition containing 0.02 to 0.10% by weight, the balance being Fe and unavoidable impurities, and having a structure in which graphite having a maximum particle size of 100 μm or less is dispersed in a base material; An iron-based sintered alloy with excellent wear resistance for sliding members .
１．０〜３．０重量％、Ｃ：１．０〜１．８重量％、
Ｂ：０．０００３〜０．００３重量％を含有し、残りが
Ｆｅおよび不可避不純物からなる組成、並びに素地中に
最大粒径：１００μｍ以下の黒鉛が分散した組織を有す
ることを特徴とする強度および耐摩耗性に優れた摺動部
材用鉄基焼結合金。3. Ni: 1.0 to 4.0% by weight, Si:
1.0 to 3.0% by weight, C: 1.0 to 1.8% by weight,
B: Strength and strength characterized by containing 0.0003 to 0.003% by weight, the balance being Fe and unavoidable impurities, and having a structure in which graphite having a maximum particle size of 100 μm or less is dispersed in a base material. Sliding parts with excellent wear resistance
Iron-based sintered alloy for materials .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28177393A JP3257196B2 (en) | 1993-10-15 | 1993-10-15 | Iron-based sintered alloy for sliding members with excellent strength and wear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28177393A JP3257196B2 (en) | 1993-10-15 | 1993-10-15 | Iron-based sintered alloy for sliding members with excellent strength and wear resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07113150A JPH07113150A (en) | 1995-05-02 |
| JP3257196B2 true JP3257196B2 (en) | 2002-02-18 |
Family
ID=17643781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28177393A Expired - Fee Related JP3257196B2 (en) | 1993-10-15 | 1993-10-15 | Iron-based sintered alloy for sliding members with excellent strength and wear resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3257196B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005010226A1 (en) * | 2003-07-29 | 2005-02-03 | Nippon Piston Ring Co., Ltd. | Cam lobe member, camshaft using the same and method for producing cam lobe member |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006038670B4 (en) * | 2006-08-17 | 2010-12-09 | Federal-Mogul Burscheid Gmbh | High silicon steel material for the production of piston rings and cylinder liners |
-
1993
- 1993-10-15 JP JP28177393A patent/JP3257196B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005010226A1 (en) * | 2003-07-29 | 2005-02-03 | Nippon Piston Ring Co., Ltd. | Cam lobe member, camshaft using the same and method for producing cam lobe member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07113150A (en) | 1995-05-02 |
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