JPH0397834A - Sintered metallic body and its production - Google Patents
Sintered metallic body and its productionInfo
- Publication number
- JPH0397834A JPH0397834A JP1232758A JP23275889A JPH0397834A JP H0397834 A JPH0397834 A JP H0397834A JP 1232758 A JP1232758 A JP 1232758A JP 23275889 A JP23275889 A JP 23275889A JP H0397834 A JPH0397834 A JP H0397834A
- Authority
- JP
- Japan
- Prior art keywords
- copper
- powder particles
- iron
- powder
- coated
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 66
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052802 copper Inorganic materials 0.000 claims abstract description 39
- 239000010949 copper Substances 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010951 brass Substances 0.000 claims abstract description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011247 coating layer Substances 0.000 claims abstract description 17
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 15
- 239000010439 graphite Substances 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 12
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 6
- 229910052582 BN Inorganic materials 0.000 claims abstract description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 51
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000011812 mixed powder Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 24
- 230000007797 corrosion Effects 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 8
- 230000013011 mating Effects 0.000 abstract description 7
- 239000010410 layer Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 238000005056 compaction Methods 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 239000011133 lead Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 2
- 239000010956 nickel silver Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011797 cavity material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006023 eutectic alloy Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000010723 turbine oil Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
「発明の目的」
本発明は焼結金属体およびその製造法に係り、耐食性に
優れていると共に相手部材に対するなじみ性が良好で、
しかも強度的に卓越した焼結金属体およびその好ましい
製造法を提供しようとするものである。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The present invention relates to a sintered metal body and a method for manufacturing the same, which has excellent corrosion resistance and good compatibility with a mating member.
Furthermore, the present invention aims to provide a sintered metal body with excellent strength and a preferable method for manufacturing the same.
（産業上の利用分野）
軸受材その他に用いられるに適した焼結金属体およびそ
の製造に関する技術。(Industrial Application Field) Sintered metal bodies suitable for use in bearing materials and other applications, and technology related to their production.
（従来の技術）
焼結金属体は圧粉成形、焼結、サイジング等により目的
の製品を直接的且つ量産的製造することができ、潤滑材
なども適切に配合分布し得るものと予想されることから
軸受材その他に広く採用され普及されつつある。即ち例
えば焼結含油軸受については日本工業規格としてＪＩＳ
Ｂ １５８１１９７６に規定されている如く、家
庭用電気機器、音響用機器、事務用機械、農業用機械、
自動車その他の運搬荷役機器などに用いる円筒形、フラ
ンジ付円筒形および球形などの軸受材に関して種々に規
定され、又その主たる威分組成としては純鉄系、鉄一銅
系、鉄一炭素系、鉄一銅一炭素系、鉄一銅一鉛系、青銅
系、銅系、鉛一青銅系など材質、種類は比較的多岐に亘
る。(Prior art) Sintered metal bodies can be directly and mass-produced into desired products by powder compaction, sintering, sizing, etc., and it is expected that lubricants and the like can be appropriately mixed and distributed. Therefore, it is being widely adopted and popularized for bearing materials and other applications. For example, for sintered oil-impregnated bearings, JIS is the Japanese Industrial Standard.
As defined in B 15811976, household electrical equipment, audio equipment, office machinery, agricultural machinery,
There are various regulations regarding bearing materials such as cylindrical, flanged cylindrical, and spherical bearings used for automobiles and other transportation equipment, etc., and their main compositions are pure iron, iron-copper, iron-carbon, There is a relatively wide variety of materials and types, including iron, copper, and carbon, iron, copper, and lead, bronze, copper, and lead and bronze.
なお例えば特開昭５６−５１５５４号公報においては鉄
粉と黄銅粉を用いた圧籾体を焼結することが発表されて
おり、更に本発明者等によっても特開昭６０−２００９
２７号公報において鉄粉、黄銅粉および洋白粉を用い、
それらの混合粉による圧粉成形体を還元性雰囲気で焼結
処理することを提案している。For example, JP-A No. 56-51554 discloses sintering a compacted rice body using iron powder and brass powder, and the present inventors also published JP-A No. 60-2009.
In Publication No. 27, using iron powder, brass powder and nickel silver powder,
It is proposed to sinter a compacted body made of these mixed powders in a reducing atmosphere.
又同じく本発明者等による特開昭５ ３ −１４６２０
３（特公昭５６−４１４０）においては鉄粉を主体とし
、これに３〜３０％の銅と適当な滑材を混合したものを
圧粉成形して得られる成形体を雰囲気ガスを透過せしめ
得る材質の容器内における酸化亜鉛末中に埋め施蓋して
水素ガスまたは還元ガス性雰囲気炉中で焼結処理するこ
とを発表している。Also, Japanese Patent Application Laid-Open No. 53-14620 by the present inventors
3 (Japanese Patent Publication No. 56-4140), a compact made of iron powder mixed with 3 to 30% copper and a suitable lubricant is powder-molded, and the resulting compact can be made permeable to atmospheric gas. It has been announced that the material is buried in zinc oxide powder in a container made of the same material and then sealed and sintered in a hydrogen gas or reducing gas atmosphere furnace.
即ちこの方法によるものは酸化亜鉛末が還元されて生じ
た亜鉛蒸気が銅粉および鉄粉粒子に吸着されて銅一亜鉛
および鉄一亜鉛合金化し、温度の上昇と共に銅の一部は
鉄粒子に共晶し鉄一洞一亜鉛の合金も形成されるものと
推定される。In other words, in this method, zinc vapor generated by reducing zinc oxide powder is adsorbed by copper powder and iron powder particles to form copper-zinc and iron-zinc alloys, and as the temperature rises, some of the copper becomes iron particles. It is presumed that a eutectic alloy of iron, cavities, and zinc is also formed.
（発明が解決しようとする課題）
上記した鉄を主体とした含油軸受においては骨格的強度
に優れ、高荷重用として好ましいが、相手部材に対する
なじみ性や耐食性に劣っているので利用上制限を受ける
．
これに対し銅または青銅を主体としたものにおいてはな
じみ性や耐食性は良好であるが、強度上不充分であるか
ら高負荷用に適しない。(Problems to be Solved by the Invention) The above-mentioned oil-impregnated bearings mainly made of iron have excellent skeletal strength and are suitable for high-load applications, but are limited in their use because they have poor conformability to mating members and corrosion resistance. ．． On the other hand, those made mainly of copper or bronze have good conformability and corrosion resistance, but are not suitable for high-load applications because they have insufficient strength.
鉄一銅系（鉄一銅一鉛、鉄一銅一炭素などを含む）のも
のはこれらの中間的特性となるが、なお強度や耐食性に
おいて不充分である。前記した特開昭５６−５１５５４
号公報による鉄粉と黄銅粉を用いたものにおいては耐食
性においては好ましいとしても強度や相手部材に対する
なじみ性などにおいて充分でない。Iron-copper type materials (including iron, copper, lead, iron, copper, carbon, etc.) have properties intermediate between these, but are still insufficient in strength and corrosion resistance. The above-mentioned Japanese Patent Application Laid-Open No. 56-51554
Although the product using iron powder and brass powder according to the publication is good in terms of corrosion resistance, it is not sufficient in terms of strength and conformability to a mating member.
前記特開昭６０−２００９２７号公報のものは洋白をも
用いることにより強度性を確保しながら充分な耐食性と
摩擦係数低減を図ったものであるが、それらの特性にお
いて必ずしも満足するものとなし得す、又軸材なとの相
手部材に対するなじみ性などにおいて不充分である。The product disclosed in JP-A No. 60-200927 also uses nickel silver to ensure sufficient corrosion resistance and reduce the coefficient of friction while ensuring strength, but these properties are not necessarily satisfactory. In addition, it is insufficient in terms of compatibility with mating members such as shaft members.
更に上記した特公昭５６−４１４０ （特開昭５３−１
４６２０３）のものにおいては、その銅粉粒子に関して
表面に鉛一亜鉛合金（黄銅）が形威されているとしても
ξクロ的には部分的であって、鉄一亜鉛合金化粒子や鉄
一銅一亜鉛合金の混在したものとなり、即ち各種合金粒
子の混合状態であるから、耐食性、なじみ性、強度など
において、なお不充分の傾向が認められる。Furthermore, the above-mentioned Japanese Patent Publication No. 56-4140 (Japanese Patent Publication No. 53-1
46203), even if lead-zinc alloy (brass) is formed on the surface of the copper powder particles, it is only partial in terms of ξchromatography, and iron-zinc alloyed particles or iron-copper are formed on the surface. Since it is a mixture of zinc alloys, that is, it is a mixture of various alloy particles, it tends to be insufficient in terms of corrosion resistance, conformability, strength, etc.
「発明の構戒」
（課題を解決するための手段）
１．２０．５〜６０ｗｔ％の黄Ｍｊ４質被覆層により４
０〜？９．５ｗｔ％の鉄粉粒子における実質的全周面が
被覆された状態で気孔率８〜３５ｖｏｊ２％に圧粉成形
、焼結されたことを特徴とする焼結金属体。"Invention Structure" (Means for Solving the Problems) 1.20.5 to 60 wt% yellow Mj4 coating layer
0~? A sintered metal body characterized in that iron powder particles of 9.5 wt % are compacted and sintered to a porosity of 8 to 35 voj 2% in a state in which substantially the entire circumferential surface is coated.
２．１９．〜５９．７ｗｔ％の黄ｗ４質被覆層により３
８〜７９．２ｗｔ％の鉄粉粒子における実質的全周面が
被覆された状態をなし、しかも黒鉛、二硫化モリブデン
または鉛のような固体潤滑材の１種または２種以上を含
有し、気孔率が８〜３５ＶＯｌ％に圧粉戒形、焼結され
たことを特徴とする焼結金属体。2.19. ~59.7wt% yellow W4 coating layer
8 to 79.2 wt% of the iron powder particles are coated on substantially the entire circumferential surface thereof, and contain one or more solid lubricants such as graphite, molybdenum disulfide, or lead, and contain pores. A sintered metal body characterized by being compacted and sintered to a ratio of 8 to 35 VOl%.
３． ２０〜５５ｗｔ％の銅被覆層により４５〜８０ｗ
ｔ％の鉄粉粒子ｅこおける実質的全周面を被覆した銅被
覆粉粒を圧粉戒形し、この圧粉成形体を酸化亜鉛粉末と
共に焼結処理することを特徴とする焼結金属体の製造法
。3. 45-80w with 20-55wt% copper coating layer
A sintered metal characterized by compacting copper-coated powder particles covering substantially the entire circumferential surface of iron powder particles e of t%, and sintering the compacted powder together with zinc oxide powder. How the body is manufactured.
４． ２０〜５５ｗｔ％の銅被覆層により４５〜８０ｗ
ｔ％の鉄粉粒子における実質的全周面を被覆した銅被覆
粉粒９５〜９９．５ｗｔ部に黒鉛、二硫化モリブデンま
たは鉛のような固体潤滑材粉粒０． ５〜Ｓｗｔ部の割
合で混合し、この混合粉粒を圧粉成形して得られる圧粉
成形体を酸化亜鉛粉末と共に焼結処理することを特徴と
する焼結金属体の製造法。4. 45-80w with 20-55wt% copper coating layer
Solid lubricant powder particles such as graphite, molybdenum disulfide or lead are added to 95 to 99.5 wt. A method for producing a sintered metal body, which comprises mixing the mixed powder particles at a ratio of 5 to Swt parts, compacting the mixed powder particles, and sintering the compacted body obtained together with zinc oxide powder.
作用
２０．５〜６０ｗｔ％の黄銅質被覆層が鉄粉粒子に形成
されることにより該鉄粉粒子における実質的全周面が被
覆される。即ちこの黄銅質被覆層が２０．５ｗｔ％未満
では鉄粉粒子の実質的全周面を被覆し難い傾向が残り、
一方６０ｗｔ％を超えるならば鉄粉粒子の量が４０ｗｔ
％に達しないこととなり、この鉄粉粒子を核としてもた
らされる焼結金属体の強度特性などの向上が不充分とな
る。By forming a brass coating layer of 20.5 to 60 wt % on the iron powder particles, substantially the entire circumferential surface of the iron powder particles is coated. That is, if the brass coating layer is less than 20.5 wt%, it tends to be difficult to cover substantially the entire circumferential surface of the iron powder particles.
On the other hand, if it exceeds 60wt%, the amount of iron powder particles is 40wt.
%, and the strength properties of the sintered metal body produced using these iron powder particles as cores are insufficiently improved.
上記のように鉄粉粒子の実質的全周面が黄銅質被覆層に
より被覆されることによって、焼結合金における焼結組
織が実質的に単一の黄銅質相互間で得られることとなり
、圧粉戒形および焼結を容易且つ安定化する。又実質的
に鉄粉粒子を核とした焼結体であるに拘わらず、その鉄
粉粒子面の露出がξクロ的にも皆無状態になるので酸類
や食塩系あるいは高温高温条件下などの腐食性条件下で
も好ましい耐食性を示すこととなる。更に上記のように
鉄粉粒子の露出がないことから相手部材に対するなじみ
性を良好にして、摩擦係数を小とすると共に連続回転軸
受時などにおける温度上昇を低減し、前記のように強度
性に優れ、焼結構造の安定化などとも相俟って軸受部体
などとして最高状態の特性を得しめる。By covering substantially the entire circumferential surface of the iron powder particles with the brass coating layer as described above, the sintered structure in the sintered alloy is obtained between substantially single brass particles, and the pressure is reduced. Facilitates and stabilizes powder shaping and sintering. In addition, although it is a sintered body with substantially iron powder particles as its core, there is no exposed surface of the iron powder particles, so it is not susceptible to corrosion by acids, salts, or under high temperature conditions. This results in favorable corrosion resistance even under harsh conditions. Furthermore, as mentioned above, since there are no exposed iron powder particles, it has good compatibility with the mating member, reduces the coefficient of friction, reduces temperature rise during continuous rotation bearings, etc., and improves strength as mentioned above. This, combined with the stabilization of the sintered structure, allows it to achieve the best properties for bearing parts, etc.
鉄粉粒子が４０ｗｔ％以上たることにより上述のような
強度特性のみならず低コスト性を得しめる。By having iron powder particles of 40 wt % or more, not only the above-mentioned strength properties but also low cost can be obtained.
又焼結組織の安定、強固化により固形潤滑材の配合によ
る強度特性などの低下を防止して軸受材特性を有利に高
める。Further, by stabilizing and solidifying the sintered structure, the deterioration of strength characteristics due to the addition of solid lubricant is prevented, and the characteristics of the bearing material are advantageously improved.
前記した黄銅質被覆の形戒に関し、鉄粉粒子にメッキの
如きにより一且銅被覆を形威したものを圧粉成形してか
ら酸化亜鉛粉末を用い、即ち酸化亜鉛粉末中に埋め、あ
るいは酸化亜鉛粉末上に載せ、その還元によって生じた
亜鉛蒸気を上記銅被覆に吸着せしめて黄銅化することに
より鉄粉粒子周面に安定な黄銅被覆を形威せしめ、又圧
粉成形された際の空孔組織を緻密化して好ましい焼結合
金体とする。しかも上記黄銅化は焼結工程自体で達威さ
れるので特段の煩雑さをなからしめる。Regarding the shape of the brass coating described above, iron powder particles are plated with a single copper coating, compacted, and then zinc oxide powder is used, that is, embedded in zinc oxide powder, or oxidized. By placing the zinc vapor on the zinc powder and adsorbing the zinc vapor generated by the reduction to the copper coating to make it brass, a stable brass coating is formed on the surrounding surface of the iron powder particles, and the voids during compaction are removed. The pore structure is densified to provide a preferable sintered alloy body. Moreover, since the above-mentioned brass formation is accomplished in the sintering process itself, it does not require any particular complexity.
焼結金属体の気孔率を８〜３５ν０１％の範囲において
適当に選ぶことにより夫々の用途に応した強度特性が得
られる。By appropriately selecting the porosity of the sintered metal body within the range of 8 to 35 ν01%, strength characteristics suitable for each application can be obtained.
特に軸受体とする場合の気孔率は１５〜２８ｖｏ１％で
あり、即ち圧粉成形し、焼結後適宜にサイジングして気
孔率ｌ５ν０１％以上とすることによって軸受材とした
場合における含油量を適切に得しめて潤滑性能を高め得
る。一方この気孔率が２８ｖｏＪ％を超えないことによ
って強度性を確保し、含浸油滑油の過剰流出、飛散を防
止する。In particular, the porosity when used as a bearing body is 15 to 28vo1%, that is, the oil content when used as a bearing material can be adjusted appropriately by compacting the powder, sizing it appropriately after sintering, and making the porosity 15ν01% or more. lubrication performance can be improved. On the other hand, by ensuring the porosity does not exceed 28 voJ%, strength is ensured and excessive leakage and scattering of the impregnated lubricating oil is prevented.
実施例
上記したような本発明によるものの具体的な実施態様に
ついて説明すると、本発明によるものは鉄粉粒子を核と
し、これを黄銅質被覆層によって実質的全周面の被覆さ
れた状態として圧粉成形、焼結されたものであり、軸受
材などの場合には固形潤滑材を配合して潤滑性能を高め
る。EXAMPLE To explain a specific embodiment of the present invention as described above, the present invention uses iron powder particles as a core, and pressurizes the core with substantially the entire circumferential surface covered with a brass coating layer. It is powder-molded and sintered, and in the case of bearing materials, solid lubricants are added to improve lubrication performance.
主体ないし核として用いられる原材としての鉄粉粒子の
大きさについては特に制限されるものでなく、一般的に
純鉄系焼結体製造のため従来採用されている１００メッ
シュ以下程度より更に拡大した粒子範囲のものを採用す
ることができる。即ち比較的細粒のものでも製造時の銅
被覆によって増径され粒径的に従来一般的範囲のものと
同様に処理することが可能であるし、又このような被覆
によって圧粉戊形が容易となることから従来ｇ通の粒径
範囲を超えて大径のものであっても従来法同然の圧粉戒
形処理で同等ないしそれより容易に戒形することができ
る。The size of the iron powder particles as the raw material used as the main body or core is not particularly limited, and is generally larger than the 100 mesh or less that is conventionally used for producing pure iron sintered bodies. It is possible to adopt particles with a particle size within the specified range. In other words, even relatively fine grains can be increased in diameter by copper coating during production and can be processed in the same way as grains in the conventional general range, and such coating also makes it possible to reduce powder compaction. Since it is easy to use, even particles with a large diameter exceeding the conventional particle size range can be compacted with the same or easier compacting process as in the conventional method.
前記鉄粉粒子の量は一般的に４０〜７９．’５ｗｔ％で
あるが、好ましくは４０〜７０ｗｔ％、より好ましくは
４０〜６５ｗｔ％である。The amount of the iron powder particles is generally 40 to 79. '5 wt%, preferably 40 to 70 wt%, more preferably 40 to 65 wt%.
この鉄粉粒子に形威される黄銅質被覆層は２０．５〜６
０ｗｔ％であるが、好ましくは２５〜５０ｔｐｔｔ％、
より好ましくは３０〜４５ｈｔ％である。The brass coating layer formed by these iron powder particles is 20.5 to 6
0 wt%, preferably 25 to 50 tptt%,
More preferably, it is 30 to 45 ht%.
実際の製造に当っては銅被覆された鉄粉粒子を用いて圧
粉戒形し、焼結を酸化亜鉛粉末と共に行い、即ち前記の
ように酸化亜鉛粉末中に埋め、あるいは酸化亜鉛粉末上
に載せて行い、気化したＺｎ蒸気を被ｒｇＩ銅層に作用
せしめて合金化し黄銅質とすることが有利であり、斯う
したＺｎ蒸気の吸着により銅被覆は重量的に０．５〜５
ｉｖｔ％増加して黄銅質となる。In actual production, copper-coated iron powder particles are compacted and sintered with zinc oxide powder, i.e. buried in zinc oxide powder as described above, or on top of zinc oxide powder. It is advantageous to apply the vaporized Zn vapor to the rgI copper layer to alloy it and make it brassy.
ivt% increases and becomes brassy.
前記した鉄粉粒子に対する銅被覆はメッキその他の公知
のような被覆手法で形威されるが、代表的にメッキ法に
より鉄粉粒子に覆着した状態を断面し顕微鏡的に示して
いるのが添附図面であって、７０ｗｔ％の鉄粉粒子ｌに
対し略３０ｗｔ％の銅２を覆着させたこの図示の場合に
おいて鉄粉粒子ｌの外周面は略完全状態に銅層２を以て
被覆されている。然して被覆した銅層２の厚さは鉄粉量
に対する銅量（ｗｔ％）によって略比例したものとなり
、２０ｗｔ％以上の銅を被覆せしめたものにおいては採
用し、しかもその微粉末を分級して除去したものを用い
ると有効であることが実験により確認された。即ち上記
黒鉛粉末として一般的に市販されているものが１〜３０
μｍ１あるいは１〜５０μｍの如きであるのに対し本発
明者等が好ましい固体潤滑材としての黒鉛は１０〜１５
０μｍ、特に２０〜１００μｍとされ、粗粉であると共
に１０μｍまたは２０μｍ以下の微粉分をカントしたも
のであり、それによって均一分散を容易化し、また荷役
その他の取扱時における偏析発生を可及的に防止し得る
。前記のような１０μｍ未満、あるいは２０μｍ未満の
ような微粉分は液中での分級処理で粉塵の発生がなく、
しかも適切に分級し得る。The above-mentioned copper coating on the iron powder particles is formed by plating or other known coating methods, but a typical cross-sectional view of the copper coating coated on the iron powder particles by the plating method is shown microscopically. In the attached drawing, in which approximately 30 wt% of copper 2 is coated on 70 wt% of iron powder particles l, the outer peripheral surface of the iron powder particles l is almost completely covered with copper layer 2. There is. However, the thickness of the coated copper layer 2 is approximately proportional to the amount of copper (wt%) to the amount of iron powder, and it is used in cases where copper is coated with 20 wt% or more, and the fine powder is classified. Experiments have confirmed that it is effective to use the removed material. That is, the graphite powder that is generally commercially available is 1 to 30.
1 μm or 1 to 50 μm, whereas graphite as a solid lubricant preferred by the present inventors has a diameter of 10 to 15 μm.
0 μm, especially 20 to 100 μm, and is a coarse powder with fine particles of 10 μm or 20 μm or less being canted, thereby facilitating uniform dispersion and minimizing the occurrence of segregation during cargo handling and other handling. Can be prevented. As mentioned above, fine particles less than 10 μm or less than 20 μm are classified in liquid without generating dust.
Moreover, it can be classified appropriately.
なお上記したような本発明焼結金属においてはニッケル
、錫などの若干量を含有せしめてよく、特に錫の添加は
脱亜鉛腐食を防止する。The sintered metal of the present invention as described above may contain some amount of nickel, tin, etc. In particular, the addition of tin prevents dezincification corrosion.
圧粉成形は一般的に２〜３ Ｔｏｎ／一程度・で行われ
、その気孔率は一般的に８〜３５ｖｏｌであり、軸受材
の場合には２０ｖｏｌｌ％以上、好ましくは２２ｖｏｊ
！％以上であって、このようにすることにより焼結後に
サイジングし含油などを行っても実質的に全周面を被覆
した状態を形或する。即ち鉄粉粒子周面の少くとも８５
％以上、一般的には９２％以上が銅被覆２で覆着された
ものとして準備される。又このものが圧粉戒形後、酸化
亜鉛末と共に焼結されてＺｎ蒸気を吸着することにより
その銅被覆が優先的に黄銅化し増量するから安定且つ緻
密な黄銅質被覆層となり、この黄銅質被覆によって一様
に結合された焼結金属体となる。つまり鉄粉粒子の露出
は実質的に存しない状態となる。Powder compaction is generally carried out at about 2 to 3 Ton/1, and its porosity is generally 8 to 35 vol, and in the case of bearing materials, it is 20 vol% or more, preferably 22 vol%.
! % or more, and by doing so, even if sizing and oil impregnation are performed after sintering, substantially the entire circumferential surface is covered. That is, at least 85% of the peripheral surface of the iron powder particles
% or more, generally 92% or more is covered with the copper coating 2. In addition, after this material is compacted, it is sintered with zinc oxide powder and adsorbs Zn vapor, thereby preferentially turning the copper coating into brass and increasing its weight, resulting in a stable and dense brass coating layer. The result is a sintered metal body that is uniformly bonded by the coating. In other words, there is virtually no exposure of iron powder particles.
固体潤滑材としての黒鉛、二硫化モリブデン、窒化ボロ
ンなとは粉末として添加されることは当然であるが、黒
鉛のような固体潤滑材は前述したような銅被覆鉄粉に対
してはその比重が小であって、このような黒鉛の如きを
単に混合しても他の原料扮に対し均一状態に分敵させる
ことが困難であり、しかも搬送荷役中およびブレスホ，
バーヘの入替え、圧粉成形時などにおいて黒鉛粉の浮上
、片寄りなどによる偏析が発生する。そこでこのような
黒鉛の如き固体潤滑材に関し比較的粗粉のものを採用し
、しかもその？ｌＸＩｌ３分を分級して除去したものを
用いると有効であることが実験により６ｆ認された。即
ち上記黒鉛粉末として一般的に市販されているものが１
〜３０μｍ、あるいは１〜５０μｍの如きであるのに対
し本発明者等が好ましい固体潤滑材としての黒鉛は１０
〜１５０μｍ，特に２０〜１００ｐｓとされ、粗粉であ
ると共に１０μｍまたは２０μｍ以下の微粉分をカット
したものであり、それによって均一分散を容易化し、ま
た荷役その他の取扱時における偏析発生を可及的に防止
し得る。前記のような１０μｍ未満、あるいは２０μ一
未満のような微粉分は液中での分級処理で粉塵の発生が
なく、しかも適切に分級し得る．
なお上記したような本発明焼結金属においてはニッケル
、錫などの若干量を含有せしめてよい。It goes without saying that graphite, molybdenum disulfide, and boron nitride are added as solid lubricants in the form of powder, but solid lubricants such as graphite have a lower specific gravity than the copper-coated iron powder mentioned above. Even if such graphite is simply mixed, it is difficult to make it uniformly comparable to other raw materials.
Segregation occurs due to floating and shifting of graphite powder during bar replacement, powder compaction, etc. Therefore, we adopted a relatively coarse powder solid lubricant such as graphite, and what is more? It has been confirmed through experiments that it is effective to use 6f obtained by classifying and removing 3 minutes of lXIl. That is, the graphite powder that is generally commercially available is 1.
~30μm, or 1~50μm, whereas graphite as a solid lubricant preferred by the present inventors has a diameter of 10μm.
~150μm, especially 20~100ps, and is a coarse powder with the fine powder of 10μm or 20μm or less cut off, which facilitates uniform dispersion and minimizes the occurrence of segregation during cargo handling and other handling. can be prevented. Fine particles of less than 10 μm or less than 20 μm as described above do not generate dust when classified in liquid, and can be classified appropriately. The sintered metal of the present invention as described above may contain some amount of nickel, tin, etc.
圧粉成形は一般的に２〜３ ｔｏｎ／ｃｉ程度で行わ
れ、その気孔率は一般的に８〜３５ｖｏ７！であり、軸
受材の場合には２０ｖｏｌ％以上、好ましくは２２ｖ０
７ｉ％以上であって、このようにすることにより焼結後
にサイジングし含油などに好ましい気孔率をもった製品
とすることができる。３５ｖｏｆ％を超えたような気孔
率の圧粉成形体は焼結取扱中などにおいて損壊、欠損の
可能性が高い。Powder compaction is generally performed at about 2 to 3 tons/ci, and its porosity is generally 8 to 35vo7! In the case of bearing materials, it is 20vol% or more, preferably 22v0
By doing so, it is possible to obtain a product with a porosity suitable for oil impregnation by sizing after sintering. A powder compact with a porosity exceeding 35 vof% is highly likely to be damaged or chipped during sintering and handling.
焼結は前記した酸化亜鉛末と共に行う場合は７５０〜９
５０℃、特に８００〜１０００℃の還元雰囲気中で行う
。この温度は鉄粉を用いた場合の一般的焼結温度より相
当に低く、又銅粉単味の場合よりも低いものであって、
焼結工程の簡易化を図る。なお上記のように酸化亜鉛粉
末を用いた焼結は雰囲気ガスを透過せしめ得る材質の容
器中に収容された亜鉛粉末中に圧粉成形体を埋めて施蓋
した条件下で実施する。When sintering is performed with the above-mentioned zinc oxide powder, the temperature is 750 to 9.
It is carried out in a reducing atmosphere at 50°C, especially 800-1000°C. This temperature is considerably lower than the general sintering temperature when using iron powder, and is also lower than when using only copper powder,
Aim to simplify the sintering process. As mentioned above, sintering using zinc oxide powder is carried out under conditions in which the compact is buried in zinc powder contained in a container made of a material that allows atmospheric gas to pass therethrough and the container is covered.
上記したような本発明によるものの具体的な製造例につ
いて説明すると以下の如くである。A specific manufacturing example of the above-mentioned product according to the present invention will be described below.
製造例１，
７０ｗｔ％に相当した鉄粉粒子に対して３０ｗｔ％とな
るように銅をメッキして覆着した銅被覆鉄粉を準備し、
このものを成形密度比が７０％となるように外径寸法１
２ｆｌで内径が６ｆｌの軸受体として圧粉戒形してから
酸化亜鉛末を収容した雰囲気透過可能な黒鉛バット内に
収容し、同質の蓋を施して８００℃と９００℃の水素ガ
スによる還元雰囲気で焼結処理した。Production Example 1: Copper-coated iron powder was prepared by plating and covering copper to 30 wt% of iron powder particles corresponding to 70 wt%,
The outer diameter of this product is 1 so that the molding density ratio is 70%.
After compacting into a 2 fl bearing body with an inner diameter of 6 fl, it was placed in a graphite vat that contained zinc oxide dust and allowed to pass through the atmosphere, and a homogeneous lid was applied to reduce the atmosphere with hydrogen gas at 800°C and 900°C. sintered.
焼結体の端面硬さは８００℃で焼結したものがＨＲｈ５
８、９００℃で焼結したものがＨＲｈ７２と、その焼結
条件との関係において好ましいなしみ性を有しており、
しかも圧環強度は８００℃焼結のものが１９．１ｋｇ／
ｍ” 、９００℃焼結のものが２４ｋｇ／ｎｒ”とその
圧粉成形密度および焼結条件を考慮した場合において頗
る高強度のものであることが確認ざれた。The end surface hardness of the sintered body is HRh5 when sintered at 800℃.
8. The material sintered at 900°C has favorable staining properties in relation to HRh72 and its sintering conditions.
Moreover, the radial crushing strength is 19.1 kg/
It was confirmed that the material sintered at 900° C. had an extremely high strength of 24 kg/nr", considering the compacting density and sintering conditions.
製造例２．
２２ｗｔ％の銅被覆層を形威した鉄粉■と、５３ｗｔ％
の銅被覆層を形威した鉄粉■とを準備し、これらに黒鉛
粉末をｌｓｍｔ％添加した原料粉を夫々■戒形密度が６
５ｖｏｊ！％および０７５ｖｏｊ！％となり製造例１と
同じ軸受体として圧粉成形し、これらの圧粉成形体を上
記した製造例１と同じに黒鉛バット中の酸化亜鉛末内へ
収容させて施蓋した。このようにして得られた■■、■
◎、■■および■Ｏの４種のものを夫々焼結温度■８０
０℃、■９００℃で焼結処理した８種の焼結金属体を得
、これら各焼結金属体についての表面硬さおよび圧環強
度を測定した結果は次の第１表の如くであって、その圧
粉成形密度および焼結条件を考慮した場合において好ま
しい軸受体であることが確認された。Production example 2. Iron powder ■ with a copper coating layer of 22 wt% and 53 wt%
Prepare iron powder with a copper coating layer of
5voj! % and 075voj! %, and the bearing bodies were compacted as in Production Example 1, and these compacted bodies were housed in zinc oxide powder in a graphite vat in the same manner as in Production Example 1 described above, and the lid was closed. ■■,■ obtained in this way
The four types of ◎, ■■ and ■O are each sintered at a temperature of ■80
Eight types of sintered metal bodies were obtained which were sintered at 0°C and 900°C, and the surface hardness and radial crushing strength of each of these sintered metal bodies were measured. The results are shown in Table 1 below. It was confirmed that this is a preferable bearing body when considering its powder compacting density and sintering conditions.
第１表
更にこれら８種の焼結金属体について温度６０℃、湿度
８０％の条件下で耐食性試験を１２０日間行った結果は
次の第２表の如くであり、何れも好ましい耐食性を有す
ることが確認された。Table 1 Furthermore, the results of a corrosion resistance test conducted on these eight types of sintered metal bodies at a temperature of 60°C and a humidity of 80% for 120 days are shown in Table 2 below, and all of them have favorable corrosion resistance. was confirmed.
第２表
油させたものをｌｌ＆ｌｌＯＯものを採用し、同様に試
験した結果を併せて示すと次の第３表の如くである。The following Table 3 shows the results of a similar test using ll&lloo oil as the second table.
第
３
表
又上記のようなＭ１〜８の焼結金属に対しタービン油を
含浸せしめ、即ち−３０ｍＨｇ程度の真空条件で気孔中
の空気を除去して浸油せしめ、その摩擦係数および連続
回転による温度上昇値を求めた。この場合に比較材とし
て従来の１％黒鉛を配合し成形密度比１０ｖｏｌ％とし
た純鉄系軸受をＮＱ９とし、又純鉄粉と黄銅粉とを等量
配合したものに同じく１％の黒鉛を配合し同じく成形密
度比１０ｖｏｌ％のものに対し同様に含即ち本発明によ
るｌｌｈｌ〜８のものは比較材（Ｎａ９および１０）に
比し何れも好ましい軸受機能を有することが確認され、
特に比較材ＮＱｌＯは同じ材ｆ＆［ｌ戒であっても軸受
特性値において相当に劣っている。Table 3 Also, the sintered metal of M1 to 8 as described above is impregnated with turbine oil, that is, the air in the pores is removed under a vacuum condition of about -30 mHg, and the oil is impregnated. The temperature rise value was determined. In this case, as a comparison material, a pure iron bearing with a conventional 1% graphite blended and a molded density ratio of 10 vol% was designated as NQ9, and the same 1% graphite was blended with equal amounts of pure iron powder and brass powder. It was confirmed that, compared to the comparative materials (Na9 and 10), those containing llhl~8 according to the present invention had a preferable bearing function compared to the same compounded materials with a molded density ratio of 10 vol%.
In particular, the comparative material NQlO is considerably inferior in bearing characteristic values even though it is the same material f&[l.
「発明の効果」
以上説明したような本発明によるときは相手部材に対す
るなじみ性や耐食性および強度の如きの何れにおいても
優れており、同じ分析的或分組戒をもった従来の軸受材
に対しても軸受特性が大幅に改善され、且つ安定した製
品を提供せしめ、又その好ましい有利な製造法を得しめ
るものであって、工業的にその効果の大きい発明である
。"Effects of the Invention" The present invention as explained above is superior in all aspects such as compatibility with mating members, corrosion resistance, and strength, and is superior to conventional bearing materials having the same analytical and certain assembly rules. This invention provides a product with significantly improved bearing characteristics and stability, and provides a preferable and advantageous manufacturing method, and is an industrially highly effective invention.
図面は本発明の技術的内容を示すものであって、第１図
と第２図は本発明で用いる銅被覆鉄粉の１例を顕微鏡的
に拡大して示した断面図である。
然してこの図面において、１は鉄粉粒子、２は銅被覆を
示すものである。
第 ２ 圓
一２２The drawings illustrate the technical contents of the present invention, and FIGS. 1 and 2 are microscopically enlarged cross-sectional views of one example of the copper-coated iron powder used in the present invention. However, in this drawing, 1 indicates iron powder particles and 2 indicates a copper coating. 2nd Enichi 22
Claims (1)
７９．５ｗｔ％の鉄粉粒子における実質的全周面が被覆
された状態で気孔率８〜３５ｖｏｌ％に圧粉成形、焼結
されたことを特徴とする焼結金属体。 ２、１９．〜５９．７ｗｔ％の黄銅質被覆層により３８
〜７９．２ｗｔ％の鉄粉粒子における実質的全周面が被
覆された状態をなし、しかも黒鉛、二硫化モリブデン、
窒化ボロンまたは鉛のような固体潤滑材の１種または２
種以上を含有し、気孔率が８〜３５ｖｏｌ％に圧粉成形
、焼結されたことを特徴とする焼結金属体。 ３、２０〜５５ｗｔ％の銅被覆層により４５〜８０ｗｔ
％の鉄粉粒子における実質的全周面を被覆した銅被覆粉
粒を圧粉成形し、この圧粉成形体を酸化亜鉛粉末と共に
焼結処理することを特徴とする焼結金属体の製造法。 ４、２０〜５５ｗｔ％の銅被覆層により４５〜８０ｗｔ
％の鉄粉粒子における実質的全周面を被覆した銅被覆粉
粒９５〜９９．５ｗｔ部に黒鉛、二硫化モリブデン、窒
化ボロンまたは鉛のような固体潤滑材粉粒０．５〜５ｗ
ｔ部の割合で混合し、この混合粉粒を圧粉成形して得ら
れる圧粉成形体を酸化亜鉛粉末と共に焼結処理すること
を特徴とする焼結金属体の製造法。1.20.5 to 60 wt% brass coating layer
A sintered metal body characterized in that iron powder particles of 79.5 wt % are compacted and sintered to have a porosity of 8 to 35 vol % in a state in which substantially the entire circumferential surface is coated. 2, 19. ~59.7wt% brass coating layer
Substantially the entire circumferential surface of ~79.2 wt% iron powder particles is coated, and graphite, molybdenum disulfide,
One or two solid lubricants such as boron nitride or lead
1. A sintered metal body characterized in that it contains at least one species, and is compacted and sintered to have a porosity of 8 to 35 vol%. 3. 45-80wt with 20-55wt% copper coating layer
A method for producing a sintered metal body, comprising compacting copper-coated powder particles covering substantially the entire circumferential surface of iron powder particles, and sintering the compacted powder together with zinc oxide powder. . 4. 45-80wt with 20-55wt% copper coating layer
Solid lubricant powder particles such as graphite, molybdenum disulfide, boron nitride, or lead are added to 95 to 99.5 wt portion of copper-coated powder particles that cover substantially the entire circumferential surface of the iron powder particles.
1. A method for producing a sintered metal body, which comprises mixing the mixed powder particles at a ratio of t parts, compacting the mixed powder particles, and sintering the compact obtained together with zinc oxide powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1232758A JP2631146B2 (en) | 1989-09-11 | 1989-09-11 | Sintered metal body and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1232758A JP2631146B2 (en) | 1989-09-11 | 1989-09-11 | Sintered metal body and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0397834A true JPH0397834A (en) | 1991-04-23 |
| JP2631146B2 JP2631146B2 (en) | 1997-07-16 |
Family
ID=16944292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1232758A Expired - Fee Related JP2631146B2 (en) | 1989-09-11 | 1989-09-11 | Sintered metal body and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2631146B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961948A (en) * | 2020-06-05 | 2020-11-20 | 天钛隆（天津）金属材料有限公司 | SiC particle reinforced iron-based composite material and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6663344B2 (en) * | 2001-03-28 | 2003-12-16 | Mitsubishi Materials Corporation | Copper-based sintered alloy bearing and motor fuel pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53146203A (en) * | 1977-05-27 | 1978-12-20 | Tatsunosuke Kikuchi | Production of sintered alloy body |
| JPS5651554A (en) * | 1979-10-01 | 1981-05-09 | Shiyooraito:Kk | Machine parts obtained by powder metallurgical method |
| JPS57169064A (en) * | 1981-04-10 | 1982-10-18 | Hitachi Powdered Metals Co Ltd | Low wear sintered sliding material containing oil |
| JPS58189361A (en) * | 1982-04-28 | 1983-11-05 | Mitsubishi Metal Corp | Oil-containing bearing made of sintered fe alloy with superior fitness and lubricity |
| JPH01136944A (en) * | 1987-11-20 | 1989-05-30 | Isamu Kikuchi | Sintered metallic material |
-
1989
- 1989-09-11 JP JP1232758A patent/JP2631146B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53146203A (en) * | 1977-05-27 | 1978-12-20 | Tatsunosuke Kikuchi | Production of sintered alloy body |
| JPS5651554A (en) * | 1979-10-01 | 1981-05-09 | Shiyooraito:Kk | Machine parts obtained by powder metallurgical method |
| JPS57169064A (en) * | 1981-04-10 | 1982-10-18 | Hitachi Powdered Metals Co Ltd | Low wear sintered sliding material containing oil |
| JPS58189361A (en) * | 1982-04-28 | 1983-11-05 | Mitsubishi Metal Corp | Oil-containing bearing made of sintered fe alloy with superior fitness and lubricity |
| JPH01136944A (en) * | 1987-11-20 | 1989-05-30 | Isamu Kikuchi | Sintered metallic material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961948A (en) * | 2020-06-05 | 2020-11-20 | 天钛隆（天津）金属材料有限公司 | SiC particle reinforced iron-based composite material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2631146B2 (en) | 1997-07-16 |
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