JPH06323327A - Connecting rod made aluminum powder alloy - Google Patents

Connecting rod made aluminum powder alloy

Info

Publication number
JPH06323327A
JPH06323327A JP5109574A JP10957493A JPH06323327A JP H06323327 A JPH06323327 A JP H06323327A JP 5109574 A JP5109574 A JP 5109574A JP 10957493 A JP10957493 A JP 10957493A JP H06323327 A JPH06323327 A JP H06323327A
Authority
JP
Japan
Prior art keywords
connecting rod
aluminum powder
powder alloy
end part
large end
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
Application number
JP5109574A
Other languages
Japanese (ja)
Inventor
Hideo Mizukoshi
秀雄 水越
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Light Metal Industries Ltd
Original Assignee
Sumitomo Light Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Light Metal Industries Ltd filed Critical Sumitomo Light Metal Industries Ltd
Priority to JP5109574A priority Critical patent/JPH06323327A/en
Publication of JPH06323327A publication Critical patent/JPH06323327A/en
Pending legal-status Critical Current

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86Optimisation of rolling resistance, e.g. weight reduction 

Landscapes

  • Electroplating Methods And Accessories (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Chemically Coating (AREA)

Abstract

PURPOSE:To provide a connecting rod made of an aluminum powder alloy preventing fretting wear so as to improve the durability of the connecting rod. CONSTITUTION:A connecting rod 1 made of an aluminum powder alloy is provided with a small end part 3 and a large end part 4 at both ends of a rod part 2. The small end part 3 is provided with a first fitting hole 6 for inserting a piston pin through rotatably, while the large end part 4 is provided with a second fitting hole 7 with a large diameter for inserting a crankshaft through rotatably. The large end part 4 can be divided vertically, and the divided members are integrally connected at lateral protruding parts 8 by bolts 9. Hard Ni-P plated layers 10, 11 of 10mum or more in thickness are formed over the whole inner peripheral surface of the first and second fitting holes 6, 7.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、アルミニウム粉末合金
製コンロッドに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum powder alloy connecting rod.

【0002】[0002]

【従来の技術】近年、自動車やオートバイなどの省エネ
ルギー対策として、その軽量化の要望が高く、特に内燃
機関の部品のうちコンロッドを軽量化すれば、エンジン
の性能が大幅に向上するため、このコンロッドを中心に
(他の部品とともに)アルミニウム化したいという要望
が高くなっている。
2. Description of the Related Art Recently, as a measure for energy saving of automobiles, motorcycles, etc., there has been a great demand for weight reduction. Especially, if the weight of the connecting rod among the components of the internal combustion engine is reduced, the performance of the engine is greatly improved. There is a growing demand to make aluminum (along with other parts), mainly in.

【0003】ところで、コンロッドは、通常では常温〜
200℃の温度範囲で用いられるため、コンロッド材料
には、常温〜200℃における引張強度や疲労強度が必
要とされており、また縦弾性係数が高いことや線膨張係
数が低いことも重要とされている。
By the way, the connecting rod is usually at room temperature to
Since it is used in the temperature range of 200 ° C, the connecting rod material is required to have tensile strength and fatigue strength at room temperature to 200 ° C, and it is also important that the longitudinal elastic modulus and the linear expansion coefficient are low. ing.

【0004】この種の材料の一つとして、従来より、高
温強度にすぐれたアルミニウム合金であるA2218,
A2618などが知られている。また、それとは別に、
急冷凝固粉末を用いて成形したアルミニウム粉末合金材
が提案されており、本出願人も、先に特願昭62−26
3656号,特願昭62−263657号を提案した。
As one of the materials of this type, A2218, which is an aluminum alloy excellent in high temperature strength, has been conventionally used.
A2618 and the like are known. Also, apart from that,
An aluminum powder alloy material formed by using a rapidly solidified powder has been proposed, and the applicant of the present invention also previously filed Japanese Patent Application No. 62-26.
No. 3656 and Japanese Patent Application No. 62-263657 were proposed.

【0005】[0005]

【発明が解決しようとする課題】ところが、前記の様な
高温強度にすぐれたアルミニウム粉末合金を用いてコン
ロッドを製造した場合でも、次の様な問題があり必ずし
も十分ではなかった。つまり、コンロッドの小端部及び
大端部には、ピストンピン及びクランクシャフトを回動
自由に取り付けるための取付孔が各々設けられている
が、コンロッドを長期間使用していると、各々の取付孔
とピストンピン及びクランクシャフトとの間でフレッチ
ング摩耗(部材の相対すべりによる摩耗)が生じ、この
摩耗部分が切欠となってコンロッドの耐久強度が低下す
る恐れがある。
However, even when the connecting rod is manufactured using the aluminum powder alloy excellent in high temperature strength as described above, the following problems are not always sufficient. In other words, the small end and the large end of the connecting rod are provided with mounting holes for mounting the piston pin and the crankshaft in a freely rotatable manner. Fretting wear (wear due to relative slippage of members) occurs between the hole and the piston pin and the crankshaft, and this wear portion may become a notch to reduce the durability strength of the connecting rod.

【0006】この対策として、小端部の取付孔について
はブッシュを装着し、大端部の取付孔については軸受メ
タルを装着した場合にも、それらの裏金であるスチール
との間で、同様なフレッチング摩耗が生ずるという問題
は解決されなかった。本発明は、前記課題を解決するた
めになされ、フレッチング摩耗を防止してコンロッドの
耐久強度を向上することができるアルミニウム粉末合金
製コンロッドを提供することを目的とする。
As a countermeasure against this, even when a bush is attached to the mounting hole at the small end and a bearing metal is attached to the mounting hole at the large end, the same metal is used between the bush and the backing metal. The problem of fretting wear has not been solved. The present invention has been made to solve the above problems, and an object of the present invention is to provide an aluminum powder alloy connecting rod capable of preventing fretting wear and improving the durability strength of the connecting rod.

【0007】[0007]

【課題を解決するための手段及び作用】前記目的を達成
するための請求項1の発明は、小端部にピストンピンが
挿通される第1取付孔を備えるとともに、大端部にクラ
ンクシャフトが挿通される第2取付孔を備えたアルミニ
ウム粉末合金製コンロッドにおいて、前記両取付孔の少
なくとも一方の内周面に、硬質メッキ層を設けたことを
特徴とするアルミニウム粉末合金製コンロッドを要旨と
する。
In order to achieve the above-mentioned object, the invention of claim 1 is provided with a first mounting hole into which a piston pin is inserted at a small end and a crankshaft at a large end. An aluminum powder alloy connecting rod having a second mounting hole to be inserted is characterized in that a hard plating layer is provided on an inner peripheral surface of at least one of the mounting holes. .

【0008】請求項2の発明は、前記硬質メッキ層が、
厚さ10μm以上のNi−Pメッキ層であることを特徴
とする前記請求項1記載のアルミニウム粉末合金製コン
ロッドを要旨とする。ここで、上述したアルミニウム合
金材料の組成としては、例えば重量%で、Si:15〜
18%,Fe:5〜7%,Cu:4〜6%を含むアルミ
ニウム粉末合金材料を採用できる。また、このアルミニ
ウム粉末合金には、1%未満のMn、1%未満のMg、
0.2%未満のCr、O.3%未満のZn、0.2%未
満のTi、0.2%未満のNiを含んでいてもよい。
According to a second aspect of the present invention, the hard plating layer comprises:
A gist of the aluminum powder alloy connecting rod according to claim 1 is a Ni-P plated layer having a thickness of 10 µm or more. Here, the composition of the above-described aluminum alloy material is, for example, Si: 15 to 15% by weight.
An aluminum powder alloy material containing 18%, Fe: 5 to 7%, and Cu: 4 to 6% can be adopted. Also, this aluminum powder alloy contains less than 1% Mn, less than 1% Mg,
Cr less than 0.2%, O. It may contain less than 3% Zn, less than 0.2% Ti, less than 0.2% Ni.

【0009】また、硬質メッキ層としては、上述したN
i−Pメッキ層が好適であるが、それ以外にも例えばN
i−Coメッキ層,Coメッキ層,Crメッキ層や、更
にそれらを組み合わせた層を採用してもよい。この様な
硬質メッキ層は、アルミニウム粉末合金からなるコンロ
ッド本体よりも一層硬質であるので、ピストンピン及び
クランクシャフトとの間でフレッチング摩耗を防止する
ことができる。
As the hard plating layer, the above-mentioned N is used.
An i-P plated layer is suitable, but other than that, for example, N
An i-Co plated layer, a Co plated layer, a Cr plated layer, or a layer obtained by combining them may be adopted. Since such a hard plated layer is harder than the connecting rod body made of an aluminum powder alloy, fretting wear between the piston pin and the crankshaft can be prevented.

【0010】次に、アルミニウム粉末合金製コンロッド
の製造工程について説明する。 合金粉末製造工程 アルミニウム合金粉末は、ガスアトマイズ,単ロール
法,双ロール法,噴霧ロール法などの急冷凝固法を用い
て製造することができる。ここで、平均冷却速度は10
3℃/sec以上とすることが、強度および靱性向上のため
に重要である。
Next, the manufacturing process of the aluminum powder alloy connecting rod will be described. Alloy powder manufacturing process The aluminum alloy powder can be manufactured using a rapid solidification method such as gas atomization, a single roll method, a twin roll method, and a spray roll method. Here, the average cooling rate is 10
It is important that the temperature is 3 ° C./sec or more in order to improve strength and toughness.

【0011】脱ガス工程 この合金粉末は、次いで脱ガス工程に付される。この脱
ガス工程は、400〜520℃において行われるが、こ
の温度範囲であることは靱性の向上のために重要であ
る。つまり、脱ガス温度が400℃未満では脱ガス効果
が不十分となって靱性が低くなり、520℃を越えると
化合物粒子の成長が生じて強度が低下する。また、脱ガ
スの方法としては、粉末を缶に詰めて行う方法や、真空
炉中で行う方法を採用できる。脱ガス時の雰囲気とし
は、真空,N2ガス,不活性ガス等が採用でき、場合に
よっては空気中での加熱後に短時間真空引きを行なって
もよい。
Degassing Step This alloy powder is then subjected to a degassing step. This degassing step is performed at 400 to 520 ° C., but the temperature range is important for improving the toughness. That is, if the degassing temperature is lower than 400 ° C., the degassing effect is insufficient and the toughness is low, and if it exceeds 520 ° C., the growth of compound particles occurs and the strength is lowered. Further, as a method of degassing, a method of filling powder in a can or a method of performing in a vacuum furnace can be adopted. As the atmosphere for degassing, vacuum, N 2 gas, inert gas, or the like can be adopted, and in some cases, vacuuming may be performed for a short time after heating in air.

【0012】押出工程 次いで押出工程に付される。押出によりメタルフローを
与えることは靱性の向上に重要である。この押出しは、
例えば300〜500℃において押出比4以上で行われ
ることが望ましく、押出比4未満では粉末同士の結合が
不十分であり、靱性が不足する。また押出温度が300
℃未満では変形抵抗が大きく押出が困難となり、押出温
度が500℃を越えると押出割れが生じ易くなる。この
工程によって、粉末の圧縮塊は粉末同士が結合して粉末
合金となる。
Extrusion Process Next, an extrusion process is performed. Providing metal flow by extrusion is important for improving toughness. This extrusion is
For example, it is desirable to carry out at an extrusion ratio of 4 or more at 300 to 500 ° C. If the extrusion ratio is less than 4, the bonding between the powders is insufficient and the toughness is insufficient. The extrusion temperature is 300
If it is less than 0 ° C, the deformation resistance is large and extrusion becomes difficult, and if the extrusion temperature exceeds 500 ° C, extrusion cracking tends to occur. By this process, the compressed mass of the powder is combined with the powder to form a powder alloy.

【0013】鍛造工程 このようにして得られた押出し材をコンロッド成形する
ため、熱間鍛造工程に付される。熱間鍛造は400℃〜
500℃で行なわれる。鍛造温度が400℃未満では変
形能が十分でなく割れを生じ易くなり、500℃を越え
ても鍛造割れを生じ易くなる。
Forging Step The extruded material thus obtained is subjected to a hot forging step in order to form a connecting rod. Hot forging is 400 ℃ ~
It is carried out at 500 ° C. If the forging temperature is less than 400 ° C, the deformability is insufficient and cracking is likely to occur, and if it exceeds 500 ° C, forging cracking is likely to occur.

【0014】T6処理 成形されたコンロッドは、後処理として、例えばT6処
理工程に付される。T6処理工程は、溶体化処理、焼入
れ、焼戻しにより時効硬化を生じさせ、強度を向上させ
る処理である。通常、焼入れは水冷によって行い、焼戻
しは最高強度が得られる条件で行う。ただし、焼入れ歪
みや残留応力を緩和するために温水焼入れや比較的高温
での過時効焼戻しも行なわれる。
T6 Treatment The molded connecting rod is subjected to, for example, a T6 treatment step as a post-treatment. The T6 treatment step is a treatment for causing age hardening by solution treatment, quenching, and tempering to improve strength. Usually, quenching is performed by water cooling, and tempering is performed under the condition that the maximum strength is obtained. However, hot water quenching and overaging tempering at a relatively high temperature are also performed in order to relax quenching strain and residual stress.

【0015】メッキ処理 その後、メッキ処理が行われる。このメッキ処理として
は、例えば無電解メッキ処理が処理工程が簡単で好まし
い。また、この無電解メッキ処理の通常の前処理とし
て、例えば脱脂処理,エッチング処理,ジンケート処理
等が行われる。
Plating Treatment After that, plating treatment is performed. As this plating treatment, for example, electroless plating treatment is preferable because the treatment process is simple. Moreover, for example, degreasing treatment, etching treatment, zincate treatment and the like are performed as usual pretreatments for the electroless plating treatment.

【0016】尚、本発明のアルミニウム粉末合金製コン
ロッドを製造する場合には、以上の工程に加えて、さら
に必要に応じ工程を付加することができる。例えば、脱
ガス工程の前に粉末を予備圧縮しておいたり、脱ガス後
真空を保持したままホットプレスによって緻密化し、そ
れから押出を行うなどの工程を採用することができる。
さらには、粉末やフレーク、リボンの粉砕、分級なども
適宜実施することができる。また、T6処理後、コンロ
ッド表面にショットピーニング加工を施してもよい。
When the aluminum powder alloy connecting rod of the present invention is manufactured, in addition to the above steps, steps can be added as required. For example, it is possible to employ a step in which the powder is pre-compressed before the degassing step, or after degassing, the powder is densified by hot pressing while maintaining a vacuum and then extruded.
Furthermore, pulverization of powder, flakes and ribbons, classification, etc. can be carried out as appropriate. After the T6 treatment, the surface of the connecting rod may be subjected to shot peening.

【0017】[0017]

【実施例】次に、本発明の実施例について、図を参照し
て説明する。図1に示す様に、本実施例のアルミニウム
粉末合金製コンロッド(以下単にコンロッドと記す)1
は、ロッド部2の両端に小端部3と大端部4とが設けら
れている。前記小端部3には、ピストンピンが回動自由
に挿通される第1取付孔6が設けられ、大端部4には、
クランクシャフトが回動自由に挿通される大径の第2取
付孔7が設けられている。また、この大端部4は、上下
に分割可能であり、左右の凸部8にてボルト9で一体に
固定されている。
Embodiments of the present invention will now be described with reference to the drawings. As shown in FIG. 1, an aluminum powder alloy connecting rod of the present embodiment (hereinafter simply referred to as connecting rod) 1
Has a small end 3 and a large end 4 at both ends of the rod 2. The small end 3 is provided with a first mounting hole 6 into which a piston pin is rotatably inserted, and the large end 4 is
A large-diameter second mounting hole 7 is provided through which the crankshaft is freely rotatably inserted. Further, the large end portion 4 can be divided into upper and lower parts, and is integrally fixed by bolts 9 at left and right convex portions 8.

【0018】そして、前記第1及び第2取付孔6,7の
内周面には、厚さ10μm以上の硬質のNi−Pメッキ
層10,11が全周にわたって形成されている。次に、
本実施例のコンロッド1の製造方法について説明する。
まず、Si:17重量%,Fe:6重量%,Cu:4.
5重量%,Mn:0.5重量%,Mg:0.5重量から
なるアルミニウム合金を溶解後、エアアトマイズにより
粉末を製造した。そしてこの粉末を149μm以下に分
級した。こうして得られた粉末の平均粒径は60μmで
あり、平均冷却速度は6×103℃/secであった。
Hard Ni-P plating layers 10 and 11 having a thickness of 10 μm or more are formed on the inner peripheral surfaces of the first and second mounting holes 6 and 7 over the entire circumference. next,
A method of manufacturing the connecting rod 1 of this embodiment will be described.
First, Si: 17% by weight, Fe: 6% by weight, Cu: 4.
After melting an aluminum alloy composed of 5 wt%, Mn: 0.5 wt%, and Mg: 0.5 wt%, powder was produced by air atomization. Then, this powder was classified to 149 μm or less. The powder thus obtained had an average particle size of 60 μm and an average cooling rate of 6 × 10 3 ° C./sec.

【0019】この粉末をCIP(Cold Isostatic Pre
ssing)により予備圧縮し、アルミニウム缶の中に装入
して真空脱ガスを行った。脱ガス温度は490℃とし
た。その後アルミニウム缶を密封し、押出用ビレットと
した。次いで、400℃において押出を行い、断面形状
30×110mmの角棒を得た。このとき押出比は15
であった。この押出棒を鍛造素材として、コンロッド形
状に鍛造した。鍛造温度は450℃であった。この後、
490℃×1hr→水冷→175℃×6hrのT6処理
を行った。
This powder was used as CIP (Cold Isostatic Pre
It was pre-compressed by ssing), charged into an aluminum can and subjected to vacuum degassing. The degassing temperature was 490 ° C. Then, the aluminum can was sealed to obtain an extrusion billet. Then, extrusion was performed at 400 ° C. to obtain a square bar having a cross-sectional shape of 30 × 110 mm. At this time, the extrusion ratio is 15
Met. This extruded rod was forged into a connecting rod shape as a forging material. The forging temperature was 450 ° C. After this,
T6 treatment of 490 ° C. × 1 hr → water cooling → 175 ° C. × 6 hr was performed.

【0020】次いで、小端部3及び大端部4の第1及び
第2取付孔6,7に、無電解Ni−Pメッキを施した。
尚、メッキ処理部分以外は、予めマスキングを行った。
つまり、本実施例では、鍛造によってコンロッド1の成
形を行なった後に、上述した無電解メッキ処理を行なう
ことによって、厚さ10μm以上の硬質なNi−Pメッ
キ層10,11が、小端部3及び大端部4の第1及び第
2取付孔10,11の内周面に全周にわたって形成され
る。 (実験例)次に、本実施例の効果を確認するために行っ
た実験例について説明する。
Next, the first and second mounting holes 6 and 7 of the small end portion 3 and the large end portion 4 were electroless Ni-P plated.
In addition, masking was performed in advance except for the plated portion.
That is, in this embodiment, after the connecting rod 1 is formed by forging, the above-mentioned electroless plating treatment is performed, whereby the hard Ni-P plated layers 10 and 11 having a thickness of 10 μm or more are formed into the small end portions 3. And formed on the inner peripheral surfaces of the first and second mounting holes 10 and 11 of the large end portion 4 over the entire circumference. (Experimental Example) Next, an experimental example performed to confirm the effect of the present embodiment will be described.

【0021】この実験例では、前記実施例と同様なメッ
キを施した試料No.1,2のコンロッドを製造するとと
もに、比較例のコンロッドとして、メッキ層を設けない
もの(試料No.3)やメッキ層の厚さが薄いもの(試料N
o.4)を製造した。そして、それらを、実際にエンジン
に組み込んでエンジン回転数を6000rpmとして耐久
試験を行ない、フレッチング摩耗の有無及び破損が生じ
るまでの耐久時間を測定した。その結果を下記表1に示
す。
In this experimental example, the connecting rods of sample Nos. 1 and 2 plated as in the above-described example were manufactured, and as the connecting rod of the comparative example, a plated layer was not provided (sample No. 3). Thin plating layer (Sample N
o.4) was produced. Then, these were actually installed in an engine and an endurance test was conducted at an engine speed of 6000 rpm, and the presence or absence of fretting wear and the endurance time until damage occurred were measured. The results are shown in Table 1 below.

【0022】[0022]

【表1】 [Table 1]

【0023】この表1から明かな様に、本実施例のコン
ロッドは、メッキ層が10μm以上形成してあるのでフ
レッチング摩耗が少なく、よって耐久時間が500時間
を上回る優れた耐久性能を有している。それに対して、
比較例のものは、メッキ層が無いか或は(例えばNi−
Pからなる)メッキ層があっても5μmと薄いので、フ
レッチング摩耗が発生し易く、よって、耐久性能に劣る
という問題がある。
As can be seen from Table 1, the connecting rod of this embodiment has a plating layer of 10 μm or more, and therefore has little fretting wear, and therefore has excellent durability performance of more than 500 hours. There is. On the other hand,
In the comparative example, there is no plated layer or (for example, Ni-
Even if the plating layer (made of P) is as thin as 5 μm, fretting wear is likely to occur, resulting in poor durability performance.

【0024】尚、本発明は前記実施例に何等限定される
ことなく、本発明の要旨の範囲内にて各種の態様で実施
できることは勿論である。例えば硬質メッキ層として
は、Ni−Pメッキ層だけではなく、コンロッドの取付
孔の内周面の硬度を向上させることができるものであれ
ば特に限定はない。
It is needless to say that the present invention is not limited to the above embodiments and can be implemented in various modes within the scope of the gist of the present invention. For example, the hard plating layer is not limited to the Ni-P plating layer, and is not particularly limited as long as it can improve the hardness of the inner peripheral surface of the mounting hole of the connecting rod.

【0025】[0025]

【発明の効果】この様に、本発明では、アルミニウム粉
末合金製コンロッドにおいて、その小端部の第1取付孔
及び大端部の第2取付孔の少なくとも一方の内周面に、
硬質メッキ層が形成してあるので、フレッチング摩耗の
発生を防止でき、それによって、コンロッドの耐久強度
が向上するという特長がある。その結果、スチール製に
代わる好適な軽量コンロッドを得ることができる。ここ
で、特に、硬質メッキ層が、厚さ10μm以上のNi−
Pメッキ層である場合には、確実にフレッチング摩耗を
防止できるので好適である。
As described above, according to the present invention, in the aluminum powder alloy connecting rod, at least one of the first mounting hole at the small end portion and the second mounting hole at the large end portion of the connecting rod is provided with an inner peripheral surface.
Since the hard plating layer is formed, it is possible to prevent fretting wear from occurring, thereby improving durability of the connecting rod. As a result, it is possible to obtain a suitable lightweight connecting rod that replaces steel. Here, in particular, the hard plating layer is Ni-having a thickness of 10 μm or more.
The P-plated layer is preferable because fretting wear can be reliably prevented.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明の実施例のコンロッドの正面図であ
る。
FIG. 1 is a front view of a connecting rod according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1…コンロッド, 3,…小端部, 4…大端
部,6…第1取付孔, 7…第2取付孔, 10,
11…メッキ層
1 ... connecting rod, 3, ... small end part, 4 ... large end part, 6 ... first mounting hole, 7 ... second mounting hole, 10,
11 ... Plating layer

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 小端部にピストンピンが挿通される第1
取付孔を備えるとともに、大端部にクランクシャフトが
挿通される第2取付孔を備えたアルミニウム粉末合金製
コンロッドにおいて、 前記両取付孔の少なくとも一方の内周面に、硬質メッキ
層を設けたことを特徴とするアルミニウム粉末合金製コ
ンロッド。
1. A first end in which a piston pin is inserted through a small end portion.
An aluminum powder alloy connecting rod having a mounting hole and a second mounting hole into which a crankshaft is inserted, the hard plating layer being provided on an inner peripheral surface of at least one of the mounting holes. A connecting rod made of aluminum powder alloy.
【請求項2】 前記硬質メッキ層が、厚さ10μm以上
のNi−Pメッキ層であることを特徴とする前記請求項
1記載のアルミニウム粉末合金製コンロッド。
2. The aluminum powder alloy connecting rod according to claim 1, wherein the hard plating layer is a Ni—P plating layer having a thickness of 10 μm or more.
JP5109574A 1993-05-11 1993-05-11 Connecting rod made aluminum powder alloy Pending JPH06323327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5109574A JPH06323327A (en) 1993-05-11 1993-05-11 Connecting rod made aluminum powder alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5109574A JPH06323327A (en) 1993-05-11 1993-05-11 Connecting rod made aluminum powder alloy

Publications (1)

Publication Number Publication Date
JPH06323327A true JPH06323327A (en) 1994-11-25

Family

ID=14513711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5109574A Pending JPH06323327A (en) 1993-05-11 1993-05-11 Connecting rod made aluminum powder alloy

Country Status (1)

Country Link
JP (1) JPH06323327A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1006218A3 (en) * 1998-12-03 2001-10-31 Yamaha Hatsudoki Kabushiki Kaisha Plated metal part and method of manufacturing same
WO2013031483A1 (en) * 2011-08-31 2013-03-07 株式会社豊田中央研究所 Abrasion-resistant member made from aluminum alloy, and method for producing same
CN104134498A (en) * 2014-08-14 2014-11-05 国家电网公司 All aluminum conductor with surface of steel core plated with high corrosion resisting Ni-P amporphous coating
CN107202694A (en) * 2017-06-26 2017-09-26 常州机电职业技术学院 Engine link fatigue durability testing device
CN114000957A (en) * 2021-01-25 2022-02-01 辉腾交通器材(安徽)有限公司 Adjustable piston for motorcycle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1006218A3 (en) * 1998-12-03 2001-10-31 Yamaha Hatsudoki Kabushiki Kaisha Plated metal part and method of manufacturing same
US6561322B2 (en) 1998-12-03 2003-05-13 Yamaha Hatsudoki Kabushiki Kaisha Plated wear surface for alloy components and methods of manufacturing the same
WO2013031483A1 (en) * 2011-08-31 2013-03-07 株式会社豊田中央研究所 Abrasion-resistant member made from aluminum alloy, and method for producing same
CN104134498A (en) * 2014-08-14 2014-11-05 国家电网公司 All aluminum conductor with surface of steel core plated with high corrosion resisting Ni-P amporphous coating
CN104134498B (en) * 2014-08-14 2016-10-26 国家电网公司 A kind of steel core surface is coated with the aluminum stranded conductor of high anti-corrosion Ni-P amorphous coating
CN107202694A (en) * 2017-06-26 2017-09-26 常州机电职业技术学院 Engine link fatigue durability testing device
CN114000957A (en) * 2021-01-25 2022-02-01 辉腾交通器材(安徽)有限公司 Adjustable piston for motorcycle

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