JP2778965B2 - Graphite dispersed Ni-based alloy - Google Patents
Graphite dispersed Ni-based alloyInfo
- Publication number
- JP2778965B2 JP2778965B2 JP63312466A JP31246688A JP2778965B2 JP 2778965 B2 JP2778965 B2 JP 2778965B2 JP 63312466 A JP63312466 A JP 63312466A JP 31246688 A JP31246688 A JP 31246688A JP 2778965 B2 JP2778965 B2 JP 2778965B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- alloy
- based alloy
- dispersed
- present
- 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.)
- Expired - Fee Related
Links
Landscapes
- Coating By Spraying Or Casting (AREA)
- Arc Welding In General (AREA)
Description
【発明の詳細な説明】 本発明は流体潤滑が不可能な各種摺動部材や高温下で
使用される各種摺動部材において、その金属母材上に、
肉盛溶接などの方法により簡単に固体潤滑性を有するグ
ラファイトを均一に分散させた肉盛層を形成させるため
のグラファイト分散Ni基合金に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to various sliding members which cannot be fluid lubricated or various sliding members used at high temperatures.
The present invention relates to a graphite-dispersed Ni-based alloy for forming a build-up layer in which graphite having solid lubricity is easily dispersed uniformly by a method such as build-up welding.
グラファイトや二硫化モリブデンは結晶構造上異方性
が強く、特定な結晶面間や原子間でその結合力が弱く、
せん断によって切れやすく、このため内部すべりを起こ
し、低摩擦を与えることから、固体潤滑剤として用いら
れている。特にグラファイトは熱安定性にも優れている
ことから多用されている。Graphite and molybdenum disulfide have strong anisotropy in crystal structure, and their bonding strength between specific crystal planes and atoms is weak.
It is used as a solid lubricant because it easily breaks due to shearing, causing internal slip and giving low friction. Particularly, graphite is widely used because of its excellent thermal stability.
従来グラファイトを固体潤滑剤として用いる場合１）
母材表面に直接塗布するかスプレーした後乾燥させて用
いる方法、２）油や油脂類などの中に懸濁又は分散させ
て用いる方法、３）金属や樹脂と混合して複合材料の形
で用いる方法がある。しかしながら１）の方法ではグラ
ファイトを分散させた流体を部材表面に塗布（又はスプ
レー）し、乾燥させるため手間がかかり、かつ被膜が薄
いため長時間の潤滑効果は期待できない。２）の方法で
は、潤滑油に添加して用いるため、その粒度や表面物
性、油との密度差さらには他の添加剤との共存など、グ
ラファイトの安定した油中分散が得にくく、このためグ
ラファイト粒子表面にあらかじめ界面活性剤の吸着膜を
形成させるなど、親油化処理をして油に濡れやすくして
やることが必要である。また、３）の方法では部材内部
にグラファイトが分散しているため、長時間の潤滑効果
が期待できるが、グラファイトの分散性の問題や強度及
び作成の難しさなどの問題がある。Conventional use of graphite as solid lubricant 1)
The method of applying directly to the base material surface or spraying it and then drying it. 2) The method of using it by suspending or dispersing it in oil or fats and oils. 3) Mixing with a metal or resin to form a composite material. There are methods to use. However, in the method 1), a fluid in which graphite is dispersed is applied (or sprayed) to the surface of the member, and it is troublesome to dry it. Further, since the film is thin, a long-term lubricating effect cannot be expected. In the method 2), since it is used by adding it to a lubricating oil, it is difficult to obtain a stable dispersion of graphite in oil, such as its particle size, surface properties, density difference with oil, and coexistence with other additives. It is necessary to make lipophilic treatment, such as forming a surface-adsorbing film of a surfactant in advance on the surface of graphite particles, to make it easy to get wet with oil. In the method 3), since the graphite is dispersed inside the member, a long-term lubricating effect can be expected. However, there are problems such as the dispersibility of graphite, the strength, and the difficulty of preparation.
本発明者等は摺動部にグラファイトを塗布又は油と共
に供給する方法ではなく、部材内部にグラファイトが分
散したものでしかも強度が大きく、製造も容易なものを
種々検討した結果、ある特定の合金組成においてはグラ
ファイトが均一に析出し、潤滑が良好で耐摩耗性、耐食
性も良好な合金組成を見出し、本発明を完成した。The present inventors have conducted various studies on a method in which graphite is dispersed inside the member, which has high strength and is easy to manufacture, rather than a method of applying graphite to the sliding portion or supplying it together with oil. In the composition, graphite was uniformly deposited, and an alloy composition having good lubrication, good wear resistance and good corrosion resistance was found, and the present invention was completed.
また本発明の合金は、金属母材上にNi基合金を肉盛溶
接などの方法で肉盛層を形成させると同時にこの肉盛層
中に球状もしくは片状のグラファイトを均一に分散させ
ることも可能で作成が容易であることも見出した。In the alloy of the present invention, a Ni-based alloy is formed on a metal base material by a method such as overlay welding, and at the same time, spherical or flake graphite is uniformly dispersed in the overlay. It was also found that it was possible and easy to create.
即ち本発明は、重量％でC1.0〜5.0％,B0.1〜4.5％,Si
0.1〜9.0％を含有し、さらに必要に応じてCr1.0〜10.0
％又は／およびCu1.0〜5.0％を含有し、残部がNi及び不
可避的不純物よりなる組成を有することを特徴とするグ
ラファイト分散Ni基合金である。That is, the present invention is based on the following:
0.1 to 9.0%, and Cr 1.0 to 10.0 if necessary
% Or / and Cu 1.0 to 5.0%, and the balance is a graphite-dispersed Ni-based alloy characterized by having a composition of Ni and unavoidable impurities.
次に本発明合金の成分限定理由を説明する。 Next, the reasons for limiting the components of the alloy of the present invention will be described.
Ｃ ＣはNiを主体とした基質中に球状又は片状のグラファ
イトとして析出し、固体潤滑剤として働き耐摩耗性の向
上に寄与する。Ｃ含有量が重量％で1.0％未満では基質
のNi中に固溶し、ほとんどグラファイトとして析出せ
ず、5.0％以上ではNiに対する最大溶解度を越えるた
め、溶湯中に溶解しなくなる。このためＣ含有量は1.0
〜5.0％に定めた。CC precipitates as spherical or flaky graphite in a substrate mainly composed of Ni and acts as a solid lubricant, contributing to an improvement in wear resistance. If the C content is less than 1.0% by weight, it will form a solid solution in the Ni of the substrate and hardly precipitate as graphite, and if it is more than 5.0%, it will exceed the maximum solubility in Ni and will not be dissolved in the molten metal. Therefore, the C content is 1.0
Set to ~ 5.0%.
Ｂ ＢはNiとの間で金属間化合物を形成し合金の硬さを上
げる働きがある他、合金に自溶性を与え、肉盛溶接を容
易にする働きを有する。Ｂ含有量が重量％で0.1％未満
では硬さの向上及び自溶性が得られず、4.5％以上では
硬さが高くなりすぎ肉盛層に割れを生じるようになり好
ましくない。また、4.5％以上になるとNiに対するＣの
最高溶解度が下がり、グラファイトの析出がほとんど見
られなくなる。このためＢ含有量は0.1〜4.5％に定め
た。BB has a function of forming an intermetallic compound with Ni and increasing the hardness of the alloy, and also has a function of giving self-solubility to the alloy and facilitating overlay welding. If the B content is less than 0.1% by weight, improvement in hardness and self-solubility will not be obtained, and if it is 4.5% or more, the hardness will be too high and cracks will occur in the build-up layer, which is not preferable. On the other hand, when the content is 4.5% or more, the maximum solubility of C in Ni decreases, and precipitation of graphite hardly occurs. Therefore, the B content is set to 0.1 to 4.5%.
Si SiはＢと同じようにNiとの間で金属間化合物を形成し
合金の硬さを上げる働きがある他、合金に自溶性を与
え、肉盛溶接を容易にする働きを有する。Si含有量が重
量％で1.0％未満では、硬さの向上及び自溶性が得られ
ず、9.0％以上では硬さが高くなりすぎ、肉盛層に割れ
を生じるようになり好ましくない。また9.0％以上にな
るとNiに対するＣの最高溶解度が下がり、グラファイト
の析出がほとんど見られなくなる。このためSi含有量は
1.0〜9.0％に定めた。Si Like B, Ni has the function of forming an intermetallic compound with Ni and increasing the hardness of the alloy, and also has the function of imparting self-solubility to the alloy and facilitating overlay welding. If the Si content is less than 1.0% by weight, improvement in hardness and self-solubility cannot be obtained. When the content is 9.0% or more, the maximum solubility of C in Ni decreases, and precipitation of graphite is hardly observed. Therefore, the Si content is
It was set to 1.0-9.0%.
Cr Crは添加しなくても摺動部材としての特性に影響はな
いが、耐食性を要求される場合にはCrを添加する方が好
ましい。Cr Even if Cr is not added, there is no effect on the characteristics of the sliding member, but when corrosion resistance is required, it is preferable to add Cr.
Crは合金の耐食性を向上させる働きを有し、Cr含有量
が重量％で1.0％未満ではこの働きがほとんど見られ
ず、10％以上になるとＣとの間で炭化物を形成するよう
になり、グラファイトの析出量が低下し固体潤滑性が得
られなくなる。また炭化物の形成にともない肉盛層の割
れ感受性が高くなる。このためCr含有量は1.0〜10.0％
に定めた。Cr has a function of improving the corrosion resistance of the alloy. When the content of Cr is less than 1.0% by weight, this function is hardly observed, and when the content of Cr exceeds 10%, carbides are formed with C, The amount of graphite deposited decreases, and solid lubricity cannot be obtained. In addition, the susceptibility of the build-up layer to cracking increases with the formation of carbides. Therefore, the Cr content is 1.0 to 10.0%
Determined.
Cu Cuは添加しなくても摺動部材としての特性に影響はな
いが、耐食性を要求される場合にはCrと同じくCuを添加
する方が好ましい。また、CrとCuを複合して添加すれば
より好ましい。Cu Even if Cu is not added, there is no effect on the properties of the sliding member. However, when corrosion resistance is required, it is preferable to add Cu as in the case of Cr. It is more preferable to add Cr and Cu in combination.
CuはCrと同じように合金の耐食性を向上させる働きを
有するが、Cu含有量が重量％で1.0％未満ではこの働き
がほとんどみられず、5.0％以上になると肉盛溶接時偏
析を起こし、肉盛層に割れを誘発する恐れがある。Cu has a function to improve the corrosion resistance of the alloy like Cr, but this function is hardly seen when the Cu content is less than 1.0% by weight, and when the Cu content is more than 5.0%, segregation occurs at the time of overlay welding, There is a risk of causing cracks in the overlay.
なお、CrとCuを複合して添加する場合はそれぞれの下
限及び上限を添加すればよい。When adding Cr and Cu in combination, the respective lower and upper limits may be added.
次に本発明の合金を実施例により比較例と対比しなが
ら具体的に説明する。Next, the alloy of the present invention will be specifically described with reference to examples and comparative examples.
アトマイズ法により、それぞれ第１表に示される成分
組成をもつ本発明の合金及び比較例合金を粉末化（粒子
径105〜177μｍ）し、これをプラズマ粉末肉盛装置を用
い、SS−41母材上に約2.5mmの厚みに肉盛を行った。こ
うして肉盛した試験片を所定の大きさに切断し、肉盛層
表面を耐水研磨紙及びバフ研磨により研磨し、ビッカー
ス硬さ計で肉盛層の硬さを測定後、摩耗試験に供した。
摩耗試験は第２図に示すように、肉盛した試験片を固定
側白銑製リングを回転側にして行った。第２表にこの摩
耗試験条件を示す。The alloy of the present invention and the alloy of the comparative example each having the component composition shown in Table 1 were powderized (particle diameter: 105 to 177 μm) by an atomizing method, and the powder was coated on the SS-41 base material using a plasma powder overlaying apparatus. The upper part was overlaid to a thickness of about 2.5 mm. The thus-prepared test piece was cut into a predetermined size, the surface of the build-up layer was polished with water-resistant abrasive paper and buffing, and the hardness of the build-up layer was measured with a Vickers hardness meter, and then subjected to an abrasion test. .
As shown in FIG. 2, the abrasion test was performed on the overlaid test piece with the fixed-side white iron ring rotating. Table 2 shows the wear test conditions.
腐食試験は、それぞれ第１表に示される成分組成をも
つ本発明の合金及び比較例の合金をアルゴン気流中で溶
解しシエル鋳型に鋳造後、10mm×10mm×10mmに切断した
ものを試験片とし、５％H2SO4（沸騰中）に６時間浸漬
し、その時の腐食減量を測定した。 In the corrosion test, the alloys of the present invention and the alloys of the comparative examples having the component compositions shown in Table 1 were melted in an argon stream, cast into shell molds, and cut into 10 mm x 10 mm x 10 mm specimens. The sample was immersed in 5% H 2 SO 4 (during boiling) for 6 hours, and the weight loss at that time was measured.
第１表は、この摩耗試験・肉盛試験及び肉盛層の測定
結果を示したものである。Table 1 shows the results of the wear test, the overlay test and the measurement of the overlay.
また、第１図は摩耗試験の結果得られた試験片及び相
手材（リング）の摩耗減量を図示したものである。第３
図は、本発明の合金No.3における肉盛層断面のＸ線写真
で、組織からわかるように、Ni基合金基質中にグラファ
イトが均一に分散している。FIG. 1 is a graph showing the wear loss of a test piece and a mating material (ring) obtained as a result of a wear test. Third
The figure is an X-ray photograph of the cross section of the build-up layer of the alloy No. 3 of the present invention, and as can be seen from the structure, graphite is uniformly dispersed in the Ni-based alloy matrix.
第１表、第１図に示すように、本発明の合金は比較例
の合金に比べ摩耗が少なく、かつ相手の摩耗も少ない。
こうしたことから、無潤滑の状態において良好な潤滑性
を示していることがわかる。As shown in Table 1 and FIG. 1, the alloy of the present invention has less wear than the alloy of the comparative example, and also has less wear on the partner.
From these facts, it can be seen that good lubricity is exhibited in a non-lubricated state.
本発明によるグラファイト分散Ni基合金は、金属母材
にプラズマアークなどの熱源により肉盛すると同時に、
その肉盛層中に球状及び片状グラファイトを均一に分散
させようとするもので、こうして形成した肉盛層は、比
較例の合金に比べて耐摩耗性に優れ、かつグラファイト
が肉盛層全体にわたり均一に分散しているため、グラフ
ァイトを塗布（またはスプレー）した場合に比べ長時間
潤滑効果が得られる。The graphite-dispersed Ni-based alloy according to the present invention is built up on a metal base material by a heat source such as a plasma arc,
The purpose is to uniformly disperse the spherical and flaky graphite in the build-up layer. The build-up layer formed in this way has excellent wear resistance compared to the alloy of the comparative example, and the graphite forms the entire build-up layer. , The lubricating effect can be obtained for a longer time than when graphite is applied (or sprayed).
なお、上記実施例では、本発明の合金を金属母材上に
粉末肉盛して用いたが、これを鋳物として用いても肉盛
同様、優れた特性を示す。In the above-described embodiment, the alloy of the present invention was used by powder overlaying on a metal base material.
上述のように、本発明の合金は、流体潤滑が不可能な
各種摺動部材に使用することで、潤滑の効果が得られる
とともに、装置の小型集約化に寄与する。As described above, when the alloy of the present invention is used for various sliding members that cannot perform fluid lubrication, the effect of lubrication can be obtained and the device contributes to downsizing.
第１図は、摩耗試験後の試験片及び相手材の摩耗減量、
第２図は摩耗試験概略図、第３図は本発明の合金No.3に
おける肉盛層断面のＸ線写真であり、Ａは組成像でＢは
特性Ｘ線像である。FIG. 1 shows the loss of wear of the test piece and the mating material after the wear test,
FIG. 2 is a schematic diagram of a wear test, and FIG. 3 is an X-ray photograph of a cross-section of a build-up layer in alloy No. 3 of the present invention, where A is a composition image and B is a characteristic X-ray image.
Claims (4)
〜9.0％を含有し、残部がNi及び不可避的不純物よりな
る組成を有することを特徴とするグラファイト分散Ni基
合金。C. 1.0 to 5.0%, B0.1 to 4.5%, and Si0.1% by weight.
A graphite-dispersed Ni-based alloy containing up to 9.0% and a balance of Ni and unavoidable impurities.
〜9.0％を含有し、さらにCr1.0〜10.0％を含有し、残部
がNi及び不可避的不純物よりなる組成を有することを特
徴とするグラファイト分散Ni基合金。(2) C1.0-5.0%, B0.1-4.5%, Si0.1
A graphite-dispersed Ni-based alloy, characterized in that the alloy contains 0.1% to 9.0% Cr, 1.0% to 10.0% Cr, and the balance is composed of Ni and unavoidable impurities.
〜9.0％を含有し、さらにCu1.0〜5.0％を含有し、残部
がNi及び不可避的不純物よりなる組成を有することを特
徴とするグラファイト分散Ni基合金。(3) C1.0-5.0%, B0.1-4.5%, Si0.1
A graphite-dispersed Ni-based alloy containing up to 9.0%, further containing 1.0 to 5.0% of Cu, and a balance of Ni and unavoidable impurities.
〜9.0％を含有し、さらにCr1.0〜10.0％とCu1.0〜5.0％
を含有し、残部がNi及び不可避的不純物よりなる組成を
有することを特徴とするグラファイト分散Ni基合金。(4) C1.0-5.0%, B0.1-4.5%, Si0.1
~ 9.0%, Cr1.0 ~ 10.0% and Cu1.0 ~ 5.0%
A graphite-dispersed Ni-based alloy characterized by containing Ni and a balance of Ni and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312466A JP2778965B2 (en) | 1988-12-09 | 1988-12-09 | Graphite dispersed Ni-based alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312466A JP2778965B2 (en) | 1988-12-09 | 1988-12-09 | Graphite dispersed Ni-based alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02156033A JPH02156033A (en) | 1990-06-15 |
| JP2778965B2 true JP2778965B2 (en) | 1998-07-23 |
Family
ID=18029538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63312466A Expired - Fee Related JP2778965B2 (en) | 1988-12-09 | 1988-12-09 | Graphite dispersed Ni-based alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2778965B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57164950A (en) * | 1982-02-24 | 1982-10-09 | Fukuda Kinzoku Hakufun Kogyo Kk | High toughness ni alloy for build-up welding |
-
1988
- 1988-12-09 JP JP63312466A patent/JP2778965B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02156033A (en) | 1990-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jamwal et al. | Microstructural, tribological and compression behaviour of Copper matrix reinforced with Graphite-SiC hybrid composites | |
| Madhukar et al. | Fabrication and characterization two step stir casting with ultrasonic assisted novel AA7150-hBN nanocomposites | |
| Fatile et al. | Synthesis and characterization of ZA-27 alloy matrix composites reinforced with zinc oxide nanoparticles | |
| US4207096A (en) | Method of producing graphite-containing copper alloys | |
| JP3373709B2 (en) | Copper-based sliding bearing materials and sliding bearings for internal combustion engines | |
| CN100480409C (en) | Lead-free copper alloy sliding material | |
| WO1980000352A1 (en) | Process for producing graphite-containing aluminum alloy | |
| JPH03247732A (en) | Sliding material | |
| CN108570571A (en) | Sliding material and its manufacturing method and sliding component and bearing arrangement | |
| Pathak et al. | On the wear characteristics of leaded aluminium bearing alloys | |
| Vencl et al. | Production, microstructure and tribological properties of Zn-Al/Ti metal-metal composites reinforced with alumina nanoparticles | |
| Suresh et al. | Investigation of tribological behavior and its relation with processing and microstructures of Al 6061 metal matrix composites | |
| Surappa et al. | Fluidity of aluminum-silicon-alumina composite | |
| Sun et al. | Enhancing the tribological performance of Cu-WS2 composites with Ag-shell/Cu-core structure | |
| JP2778965B2 (en) | Graphite dispersed Ni-based alloy | |
| JP2735848B2 (en) | Graphite dispersed Co-based alloy | |
| JP2825834B2 (en) | Graphite dispersed self-lubricating alloy | |
| JP2778972B2 (en) | Graphite dispersed Co-Ni based self-lubricating alloy | |
| JPH06145845A (en) | Sintered friction material | |
| JP4468301B2 (en) | Abrasion-resistant lubricating alloys with finely dispersed precipitated phases | |
| JPS60187637A (en) | Production of graphite-containing aluminum alloy | |
| JPS58141356A (en) | Wear resistant sintered aluminum alloy | |
| JPS62158842A (en) | Sliding material | |
| Karaaslan et al. | Dry sliding wear behavior of cast A7075 and A7075/SAF 2205 composite material | |
| JPH06264170A (en) | Aluminum alloy having high strength and wear resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |