JP2907999B2 - High temperature sintered plain bearings - Google Patents

High temperature sintered plain bearings

Info

Publication number
JP2907999B2
JP2907999B2 JP2310879A JP31087990A JP2907999B2 JP 2907999 B2 JP2907999 B2 JP 2907999B2 JP 2310879 A JP2310879 A JP 2310879A JP 31087990 A JP31087990 A JP 31087990A JP 2907999 B2 JP2907999 B2 JP 2907999B2
Authority
JP
Japan
Prior art keywords
sintered
temperature
bearing
oil
polyethylene wax
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
Application number
JP2310879A
Other languages
Japanese (ja)
Other versions
JPH04183805A (en
Inventor
元博 宮坂
英雄 四方
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.)
Resonac Corp
Original Assignee
Hitachi Powdered Metals Co 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 Hitachi Powdered Metals Co Ltd filed Critical Hitachi Powdered Metals Co Ltd
Priority to JP2310879A priority Critical patent/JP2907999B2/en
Priority to GB9123910A priority patent/GB2249811B/en
Priority to FR9114122A priority patent/FR2669386B1/en
Priority to DE4137723A priority patent/DE4137723C2/en
Publication of JPH04183805A publication Critical patent/JPH04183805A/en
Priority to SG160694A priority patent/SG160694G/en
Application granted granted Critical
Publication of JP2907999B2 publication Critical patent/JP2907999B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/10—Alloys based on copper
    • F16C2204/12—Alloys based on copper with tin as the next major constituent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/60—Ferrous alloys, e.g. steel alloys

Description

【発明の詳細な説明】 〈産業上の利用分野〉 この発明は、複写機のヒートローラ用軸受のように高
温環境下で用いられる焼結滑り軸受に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a sintered sliding bearing used in a high-temperature environment, such as a heat roller bearing of a copying machine.

〈従来の技術〉 従来より、例えば小型モータや家電品などに用いられ
る焼結合金の滑り軸受は、その気孔内に潤滑油が含浸さ
れた焼結含油軸受が広く用いられている。<Conventional Technology> Conventionally, sintered oil-impregnated bearings in which lubricating oil is impregnated in pores have been widely used as sliding bearings made of sintered alloy used for small motors and home appliances, for example.

しかして、このような焼結含油軸受は、使用される環
境温度が250℃程度と高温の場合には含浸油が気孔から
流出し、劣化したり燃焼したりしてしまうため使用する
ことができなくなるという欠点を有している。However, such sintered oil-impregnated bearings can be used when the ambient temperature used is as high as about 250 ° C, because the impregnated oil flows out of the pores and deteriorates or burns. It has the disadvantage of disappearing.

したがって、このような場合には合金マトリックス中
に黒鉛や二硫化モリブデンのような固体潤滑剤を添加し
た含油無しの焼結合金を適用するか、あるいは高温に耐
える特殊な潤滑剤を注入したボールベアリングを適用す
るのが一般的であった。Therefore, in such a case, use an oil-free sintered alloy containing a solid lubricant such as graphite or molybdenum disulfide in the alloy matrix, or use a ball bearing with a special lubricant that can withstand high temperatures. Was generally applied.

〈発明が解決しようとする課題〉 しかしながら、固体潤滑焼結軸受は潤滑効果を出すた
めに多量の固体潤滑剤を添加しなければならず、材料強
度が低下したりあるいは摩擦係数が高くなったりしてし
まうためにその用途が限られてしまい、また製造コスト
も焼結含油軸受に比べて高価になる等の欠点がある。<Problems to be Solved by the Invention> However, solid lubricated sintered bearings require the addition of a large amount of solid lubricant in order to produce a lubricating effect, resulting in reduced material strength or increased friction coefficient. Therefore, its use is limited, and the production cost is higher than that of a sintered oil-impregnated bearing.

一方、ボールベアリングを使用するものは、通常の焼
結滑り軸受に比べて著しく高価となるという欠点を有し
ている。On the other hand, those using ball bearings have the disadvantage that they are significantly more expensive than ordinary sintered plain bearings.

この発明は、上記のような事情に鑑みてなされたもの
であり、その目的とするところは、高温環境下における
摺動特性に優れた安価な焼結滑り軸受を得ることにあ
る。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inexpensive sintered sliding bearing having excellent sliding characteristics in a high-temperature environment.

〈課題を解決するための手段〉 この発明は、上記のような目的を達成するために、多
孔性焼結合金の少なくとも摺動面側となる表層部の気孔
内に、温度250℃における溶融粘度が10〜2000センチポ
アズで、かつ、分子量が2000〜9000のポリエチレンワッ
クスが充填され、ポリエチレンワックスが軟化または液
状になる温度環境で使用されることを特徴とする。<Means for Solving the Problems> In order to achieve the above object, the present invention provides a porous sintered alloy having a melt viscosity at a temperature of 250 ° C in pores of a surface layer at least on a sliding surface side. Is filled with polyethylene wax having a molecular weight of 10 to 2000 centipoise and a molecular weight of 2000 to 9000, and is used in a temperature environment in which the polyethylene wax is softened or liquidized.

また、上記多孔性焼結合金は、銅系焼結合金または鉄
系焼結合金であって、この焼結合金のマトリックス中に
黒鉛、二硫化モリブデン、二硫化タングステン、鉛、窒
化硼素、珪酸マグネシウムの少なくとも１種が最大で20
体積％分散していることを特徴とする。Further, the porous sintered alloy is a copper-based sintered alloy or an iron-based sintered alloy, and graphite, molybdenum disulfide, tungsten disulfide, lead, boron nitride, magnesium silicate are contained in a matrix of the sintered alloy. At least one of is at most 20
It is characterized by being dispersed by volume%.

多孔性の焼結金属としては、Fe−Cu−Ｃ系およびCoや
炭化物生成元素を含有する鉄系合金,Cu−Sn系合金,Al系
合金などが適用できる。As the porous sintered metal, an Fe-Cu-C-based alloy, an iron-based alloy containing Co or a carbide-forming element, a Cu-Sn-based alloy, an Al-based alloy, or the like can be used.

また、これらの焼結合金中に上記した固体潤滑剤を含
ませると、一層優れた摺動特性が得られるようになる。Further, when the above-mentioned solid lubricant is contained in these sintered alloys, more excellent sliding characteristics can be obtained.

但し、固体潤滑剤の含有量は最大20体積％で、それ以
上では材料の強度が低く過ぎることになる。However, the content of the solid lubricant is up to 20% by volume, and if it is more than that, the strength of the material is too low.

気孔内に、焼結含油軸受の場合の油に代えて特定のポ
リエチレンワックスを充填することにより、高温環境下
においてそのワックスが軟化または液状になって摺動面
を潤滑し、低い摩擦係数が得られる。By filling the pores with a specific polyethylene wax instead of oil in the case of sintered oil-impregnated bearings, the wax softens or becomes liquid under a high-temperature environment and lubricates the sliding surface, resulting in a low coefficient of friction. Can be

ポリエチレンワックスは、気孔の大部分に含浸されて
いるのが好ましいが、軸受の表層部または内径面だけで
も差支えない。The polyethylene wax is preferably impregnated into the majority of the pores, but may be the surface layer or the inner surface of the bearing alone.

そのポリエチレンワックスの性状は、加熱冷却の繰り
返しで劣化しにくく金属を腐蝕させにくいとともに、温
度250℃における溶融粘度が10〜2000センチポアズ（c
P）のものであり、換言すると合成ワックスということ
ができる。The properties of the polyethylene wax are not easily deteriorated by repeated heating and cooling, are not easily corroded, and have a melt viscosity at a temperature of 250 ° C of 10 to 2000 centipoise (c
P), in other words, synthetic wax.

そして、温度250℃における溶融粘度が10cPより低い
ものは、使用中に軸受から流出する傾向が多くなり軸受
寿命が短くなり、一方温度250℃における溶融粘度2000c
Pより高いものは、軸受にポリエチレンワックスを含浸
するとき、ワックスが変質しない程度の高温に加熱して
も粘度が高すぎて含浸しにくい。Those having a melt viscosity of less than 10 cP at a temperature of 250 ° C. tend to flow out of the bearing during use and shorten the life of the bearing, while a melt viscosity at a temperature of 250 ° C. of 2000 cP
If the bearing is higher than P, when the bearing is impregnated with polyethylene wax, the viscosity is too high even when heated to such a high temperature that the wax is not deteriorated, so that the impregnation is difficult.

合致するポリエチレンワックスとしては、低分子量
で、好ましくは分子量が2000〜9000のものである。Suitable polyethylene waxes are those having a low molecular weight, preferably between 2000 and 9000.

その理由は、分子量が2000より少ないと加熱したとき
に減耗するなど熱安定性が悪く使用中の粘度も低くなっ
てしまうが、また分子量が9000より多いものでは溶融粘
度が高すぎることとなるためである。The reason is that if the molecular weight is less than 2,000, the viscosity during use is low, such as depletion when heated, and the viscosity during use will be low, but if the molecular weight is more than 9000, the melt viscosity will be too high It is.

〈作用〉 多孔性焼結合金の気孔内に、所定の溶融粘度をもつポ
リエチレンワックスを溶融させて含浸した軸受は、200
〜300℃程度の温度で使用すると合成ワックスが流体潤
滑し、摩擦係数が小さい滑り特性を示す。<Action> A bearing in which polyethylene wax having a predetermined melt viscosity is melted and impregnated into the pores of a porous sintered alloy is 200
When used at a temperature of about 300 ° C., the synthetic wax performs fluid lubrication and exhibits a sliding characteristic with a small coefficient of friction.

軸受合金は、黒鉛や二硫化モリブデンなど固体潤滑剤
を含むものであると、常温で運転したときには合成ワッ
クスが流体潤滑できないのを補って摩耗を少なくし、高
温においてはポリエチレンワックスの流体潤滑と相俟っ
て摩擦係数および摩耗を低下させる。When the bearing alloy contains a solid lubricant such as graphite or molybdenum disulfide, it compensates for the inability of the synthetic wax to perform fluid lubrication when operated at room temperature to reduce wear, and at high temperatures it is combined with the fluid lubrication of polyethylene wax. Reduce the coefficient of friction and wear.

〈実施例〉 以下、実施例によりこの発明を説明する。<Example> Hereinafter, the present invention will be described with reference to examples.

なお、含浸するポリエチレンワックスは以下ワックス
という。The polyethylene wax to be impregnated is hereinafter referred to as wax.

実施例−１ 組成が重量比で９％Sn,3％CoおよびCu残りからなる焼
結体をサイジングして、気孔率が20体積％で、寸法が内
径10mm,外径16mm,全長10mmの軸受形状とし、これに下記
のワックスまたは油を含浸して試料とした。Example 1 A sintered body having a porosity of 20% by volume, dimensions of an inner diameter of 10 mm, an outer diameter of 16 mm, and a total length of 10 mm is obtained by sizing a sintered body having a composition of 9% Sn, 3% Co and the balance of Cu. A sample was prepared by impregnating this with the following wax or oil.

（１）分子量4000のポリエチレンワックス （２）分子量2000のポリエチレンワックス （３）分子量1000のポリエチレンワックス （４）分子量7500のパーフルオロアルキルエーテル重合
体（PEPE、弗素オイル） （５）分子量6300のパーフルオロアルキルエーテル重合
体（弗素オイル） （６）αオレフィン合成油 これらの軸受試料を、大気中温度250℃で３時間保持
したのち冷却し、ワックスや油の流出状況を調べた。(1) Polyethylene wax having a molecular weight of 4,000 (2) Polyethylene wax having a molecular weight of 2,000 (3) Polyethylene wax having a molecular weight of 1,000 (4) Perfluoroalkyl ether polymer having a molecular weight of 7,500 (PEPE, fluorine oil) (5) Perfluoro having a molecular weight of 6,300 Alkyl ether polymer (fluorine oil) (6) α-olefin synthetic oil These bearing samples were kept at an atmospheric temperature of 250 ° C. for 3 hours, cooled, and the outflow of wax and oil was examined.

第１表に各含浸材の粘度および調査結果を示す。 Table 1 shows the viscosity of each impregnating material and the results of the investigation.

尚、試料番号は前記の含浸材番号に対応している。 The sample number corresponds to the above-mentioned impregnating material number.

試料番号4,5は通常の合成油の一例であるが、分子量
が比較的多くても粘度が低いため含浸油の流出が多い。 Sample Nos. 4 and 5 are examples of ordinary synthetic oils, but the outflow of impregnated oil is large due to low viscosity even if the molecular weight is relatively large.

また、試料番号６のものはスラッジ化を生じており問
題外である。Sample No. 6 had sludge formation and was out of the question.

さらに、試料番号１〜３のうち、温度環境250℃にお
ける粘度が10cP以上の試料番号１および２においては、
含浸油の流出が認められないことが分る。Further, among Sample Nos. 1 to 3, among Sample Nos. 1 and 2 having a viscosity of 10 cP or more in a temperature environment of 250 ° C.,
It can be seen that no outflow of impregnated oil was observed.

実施例−２ 組成が重量比で９％錫,3％コバルトおよび残り銅から
なる混合粉に、さらに黒鉛粉を５体積％混合して成形
し、焼結およびサイジングして実施例１と同様の軸受と
し、これに上記と同じワックスまたは油を含浸して各試
料を得た。Example 2 A mixture of 9% tin, 3% cobalt and the remaining copper in a weight ratio of graphite powder was further mixed with 5% by volume of graphite powder, molded, sintered and sized, and the same as in Example 1. Each sample was obtained by using a bearing and impregnating it with the same wax or oil as described above.

これらの軸受試料は、れぞれ温度環境200℃中で回転
する軸と接触させその摩擦係数を測定した。Each of these bearing samples was brought into contact with a rotating shaft in a temperature environment of 200 ° C., and the friction coefficient was measured.

但し、軸は炭素鋼（S45C）を用い、滑り速度9m/分，
面圧20Kgf/cm2で、500時間運転時の比較を行なった。However, the shaft is made of carbon steel (S45C), the sliding speed is 9m / min,
A comparison was made during 500 hours of operation at a surface pressure of 20 kgf / cm 2 .

上記の測定結果を第２表に示す。 Table 2 shows the above measurement results.

尚、試料番号は前記の含浸材番号に対応している。 The sample number corresponds to the above-mentioned impregnating material number.

上記の試料番号1,2のものは、低い摩擦係数を示して
いるのに比べ、運転中の粘度が低い試料番号３のものお
よび合成油を用いている試料番号4,5のものは高い値を
示している。 Samples Nos. 1 and 2 above exhibited low coefficients of friction, whereas Sample No. 3 which had low viscosity during operation and Sample Nos. 4 and 5 using synthetic oil had high values. Is shown.

これは、軸受からの含浸油の流出による消耗が原因し
ているものと考察される。This is considered to be due to wear caused by the outflow of impregnating oil from the bearing.

また、試料番号６のように通常の潤滑油では、油の潤
滑作用はほとんど無くなっており、黒鉛の固体潤滑によ
り摺動しているものと考えられ、高い摩擦係数を示して
いる。Further, in the case of ordinary lubricating oil as shown in Sample No. 6, the lubricating action of the oil is almost eliminated, and it is considered that the lubricating oil slides due to solid lubrication of graphite, and shows a high friction coefficient.

なお、軸受材料にCu1.5重量％の鉄系焼結合金を用い
た場合においても傾向が同様であった。The tendency was the same when a 1.5 wt% Cu-based iron-based sintered alloy was used as the bearing material.

軸受材料に各種の固体潤滑剤を添加した場合を比較す
ると、摩擦係数はいずれも大差はなかったが、黒鉛が最
も低く、次いで二硫化モリブデン，二硫化タングステ
ン，窒化硼素，珪酸マグネシウム，鉛であった。When comparing the case where various solid lubricants were added to the bearing material, the friction coefficients were not much different, but graphite was the lowest, followed by molybdenum disulfide, tungsten disulfide, boron nitride, magnesium silicate and lead. Was.

〈発明の効果〉 以上説明したように、この発明に係る焼結滑り軸受
は、多孔質焼結合金の気孔内に特定のポリエチレンワッ
クスを充填した構成としたことで、高温環境下で使用し
たときにも適度な粘度の流体潤滑作用を発揮することと
なり低い摩擦係数を示すため、焼結滑り軸受として優れ
た品質性を得ることができ、かつボールベアリングを使
用するもの等に比して安価となりコスト面における向上
を図ることができる。<Effect of the Invention> As described above, the sintered plain bearing according to the present invention has a configuration in which the pores of the porous sintered alloy are filled with a specific polyethylene wax, so that when used in a high-temperature environment. In addition, it exhibits fluid lubricating action with moderate viscosity and exhibits a low coefficient of friction, so it is possible to obtain excellent quality as a sintered plain bearing, and it is cheaper than those using ball bearings The cost can be improved.

従って、高温環境下で使用される複写機，高温装置，
搬送装置などの軸受として好適であり、焼結軸受の利用
拡大を図ることができる。Therefore, copying machines, high-temperature devices,
It is suitable as a bearing for a transfer device or the like, and the use of sintered bearings can be expanded.

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B22F 3/00 - 7/08 F16C 33/24 ────────────────────────────────────────────────── ─── Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) B22F 3/00-7/08 F16C 33/24

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】多孔性焼結合金の少なくとも摺動面側とな
る表層部の気孔内に、温度250℃における溶融粘度が10
〜2000センチポアズで、かつ、分子量が2000〜9000のポ
リエチレンワックスが充填され、ポリエチレンワックス
が軟化または液状になる温度環境で使用されることを特
徴とする高温用焼結滑り軸受。(1) A melt viscosity at a temperature of 250 ° C. is not less than 10% in pores of a surface layer at least on a sliding surface side of a porous sintered alloy.
A sintered sliding bearing for high temperature, characterized by being filled with polyethylene wax having a molecular weight of 2,000 to 9000 centipoise and used in a temperature environment in which the polyethylene wax is softened or liquidized. 【請求項２】上記多孔性焼結合金は、銅系焼結合金また
は鉄系焼結合金であって、この焼結合金のマトリックス
中に黒鉛、二硫化モリブデン、二硫化タングステン、
鉛、窒化硼素、珪酸マグネシウムの少なくとも１種が最
大で20体積％分散していることを特徴とする請求項１記
載の高温用焼結滑り軸受。2. The porous sintered alloy is a copper-based sintered alloy or an iron-based sintered alloy, wherein graphite, molybdenum disulfide, tungsten disulfide,
2. A high-temperature sintered plain bearing according to claim 1, wherein at least one of lead, boron nitride and magnesium silicate is dispersed at a maximum of 20% by volume.
JP2310879A 1990-11-16 1990-11-16 High temperature sintered plain bearings Expired - Fee Related JP2907999B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2310879A JP2907999B2 (en) 1990-11-16 1990-11-16 High temperature sintered plain bearings
GB9123910A GB2249811B (en) 1990-11-16 1991-11-11 Sintered sliding bearing
FR9114122A FR2669386B1 (en) 1990-11-16 1991-11-15 SINTERED SLIDING BEARING.
DE4137723A DE4137723C2 (en) 1990-11-16 1991-11-15 sintered bearings
SG160694A SG160694G (en) 1990-11-16 1994-11-05 Sintered sliding bearing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2310879A JP2907999B2 (en) 1990-11-16 1990-11-16 High temperature sintered plain bearings
SG160694A SG160694G (en) 1990-11-16 1994-11-05 Sintered sliding bearing

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JPH04183805A JPH04183805A (en) 1992-06-30
JP2907999B2 true JP2907999B2 (en) 1999-06-21

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JP2310879A Expired - Fee Related JP2907999B2 (en) 1990-11-16 1990-11-16 High temperature sintered plain bearings

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JP (1) JP2907999B2 (en)
DE (1) DE4137723C2 (en)
FR (1) FR2669386B1 (en)
GB (1) GB2249811B (en)
SG (1) SG160694G (en)

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US6167856B1 (en) 1992-11-12 2001-01-02 Ford Global Technologies, Inc. Low friction cam shaft
US5934236A (en) * 1992-11-12 1999-08-10 Ford Global Technologies, Inc. Low friction valve train
JP4215285B2 (en) * 1995-08-08 2009-01-28 株式会社小松製作所 Self-lubricating sintered sliding material and manufacturing method thereof
JP4743565B2 (en) * 1999-11-01 2011-08-10 株式会社ダイヤメット Graphite-dispersed Cu-based sintered alloy bearing for motor-type fuel pump that exhibits excellent wear resistance under high-pressure and high-speed circulation of gasoline, and motor-type fuel pump using the same
JP4743569B2 (en) * 2001-03-28 2011-08-10 株式会社ダイヤメット Cu-based sintered alloy bearing for motor-type fuel pump and motor-type fuel pump incorporating the bearing
JP4743568B2 (en) * 2001-03-28 2011-08-10 株式会社ダイヤメット Cu-based sintered alloy bearing for motor-type fuel pump and motor-type fuel pump incorporating the bearing
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JP5684977B2 (en) * 2009-08-31 2015-03-18 株式会社ダイヤメット Cu-based sintered sliding member
CN113560578A (en) * 2021-08-11 2021-10-29 苏州中耀科技有限公司 Forming method of temporary metal mold

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Also Published As

Publication number Publication date
FR2669386B1 (en) 1996-03-08
SG160694G (en) 1995-03-17
GB9123910D0 (en) 1992-01-02
JPH04183805A (en) 1992-06-30
DE4137723C2 (en) 1997-06-05
DE4137723A1 (en) 1992-05-21
FR2669386A1 (en) 1992-05-22
GB2249811B (en) 1994-08-24
GB2249811A (en) 1992-05-20

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