JP6502085B2 - 圧粉体及びその製造方法 - Google Patents
圧粉体及びその製造方法 Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims description 146
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 124
- 229910052742 iron Inorganic materials 0.000 claims description 49
- 239000002994 raw material Substances 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 39
- 230000001186 cumulative effect Effects 0.000 claims description 22
- 238000000748 compression moulding Methods 0.000 claims description 13
- 239000010687 lubricating oil Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 description 37
- 229910052751 metal Inorganic materials 0.000 description 37
- 239000003921 oil Substances 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 13
- 238000000465 moulding Methods 0.000 description 9
- 239000000314 lubricant Substances 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 238000005245 sintering Methods 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000001878 scanning electron micrograph Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000009692 water atomization Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005551 mechanical alloying Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000003826 uniaxial pressing Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- 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
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
-
- 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
- F16C33/128—Porous bearings, e.g. bushes of sintered alloy
-
- 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
- F16C33/14—Special methods of manufacture; Running-in
- F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/241—Chemical after-treatment on the surface
- B22F2003/242—Coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
- B22F2009/0828—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid with water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/35—Iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
- F16C2220/00—Shaping
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Nanotechnology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Powder Metallurgy (AREA)
- Sliding-Contact Bearings (AREA)
Description
上記何れの種類の純鉄粉末に対しても潤滑剤、ここではアミドワックス系の潤滑剤を0.7wt%配合し、混合したものを成形金型(合金工具鋼SKD11)に充填し、所定の成形圧力にて一軸加圧成形することにより、圧粉密度6.0±0.1g/cm3の円筒状圧粉体を得た。その後、圧粉体に対し350度で90分間脱脂処理を施して圧粉体中の潤滑剤成分を除去した上で、500度で40分間水蒸気処理を施すことで、円筒状の試験片を得た。寸法は何れも、内径φ6mm×外径φ12mm×軸方向寸法7mmとした。
今回、基材金属粉末となる純鉄粉末の形状の違いによる諸特性の差異を評価するため、各種純鉄粉末の形状の違いを以下の方法で数値化した。すなわち、図1〜図3に示す形状の各種純鉄粉末を樹脂埋めした後、サンドペーパー及びバフを用いて鏡面研磨した試料を用意する。この段階で各試料の研磨した表面には各種純鉄粉末の断面が露出した状態にある。
得られた試験片の強度を、JIS Z 2507に準拠して実施した圧環強さの測定結果に基づき評価した。ここで使用した試験装置は、株式会社島津製作所製、オートグラフAG−5000Aである。ここで圧環強さとは、圧環荷重から一定の方法で求められる円筒状圧粉体の強度をいい、圧環荷重とは、円筒状圧粉体を軸に平行な二面で圧縮して割れが生じ始めたときの荷重をいう。
また、試験片の含油率を、JIS Z 2501に準拠して実施した含油率の測定結果に基づき評価した。その手順及び方法は以下の通りである。まず、潤滑油(油圧作動油 シェルテラスS2M68 ISO粘度VG68相当)を含浸させる前の試験片(圧粉体)の重量W1(単位:g)を測定する。そして、試験片を上記潤滑油中に浸漬させ、真空引きした状態で70度で1時間以上保持した後、潤滑油を含浸させた後の試験片(圧粉体)の重量W2(単位:g)を測定する。こうして含浸前後の試験片の重量を測定した後、含油率Oc(単位:vol%)を下記の数式3に基づき算出した。ここで、Vは圧粉体の体積(単位:cm3)、ρは潤滑油の密度(単位:g/cm3)である。
Claims (10)
- 鉄系粉末を主原料とする原料粉末を圧縮成形することで得られる圧粉体であって、前記圧粉体を構成する前記鉄系粉末の間に酸化物皮膜が形成され、これにより前記鉄系粉末が相互に結合されている摺動部品用圧粉体であって、
前記鉄系粉末として、累積頻度80%における円形度Rが0.75以上を示す鉄系粉末を使用すると共に、
圧粉密度が5.3g/cm 3 以上でかつ7.2g/cm 3 以下であることを特徴とする摺動部品用圧粉体。
ここで、前記円形度Rは、前記鉄系粉末の二次元投影面積をS、二次元投影周長をLとした場合、数式1で表される。
- 鉄系粉末を主成分とする原料粉末を圧縮成形することで得られる圧粉体であって、前記圧粉体を構成する前記鉄系粉末の間に酸化物皮膜が形成され、これにより前記鉄系粉末が相互に結合されている摺動部品用圧粉体であって、
前記鉄系粉末として、累積頻度80%における凹凸度Cが2.90未満を示す鉄系粉末を使用すると共に、
圧粉密度が5.3g/cm 3 以上でかつ7.2g/cm 3 以下であることを特徴とする摺動部品用圧粉体。
ここで、前記凹凸度Cは、前記鉄系粉末の二次元投影面積をS、二次元投影周長をLとした場合、数式2で表される。
- 前記鉄系粉末として、さらに累積頻度80%における凹凸度Cが2.90未満を示すものを使用する請求項1に記載の摺動部品用圧粉体。
ここで、前記凹凸度Cは、前記鉄系粉末の二次元投影面積をS、二次元投影周長をLとした場合、数式3で表される。
- 前記鉄系粉末として、さらに累積頻度80%における円形度Rが0.75以上を示すものを使用する請求項2に記載の摺動部品用圧粉体。
ここで、前記円形度Rは、前記鉄系粉末の二次元投影面積をS、二次元投影周長をLとした場合、数式4で表される。
- 前記酸化物皮膜は、前記鉄系粉末の表面に水蒸気処理を施すことで形成されている請求項1〜4の何れかに記載の圧粉体。
- 請求項1〜4の何れかに記載の摺動部品用圧粉体で形成され、軸をすべり支持する軸受面が設けられたすべり軸受。
- 前記摺動部品用圧粉体の内部空孔に12vol%以上の潤滑油が含浸されている請求項6に記載のすべり軸受。
- 鉄系粉末を主原料とする原料粉末を圧縮成形することで得られる圧粉体であって、前記圧粉体を構成する前記鉄系粉末の間に酸化物皮膜が形成され、これにより前記鉄系粉末が相互に結合されている摺動部品用圧粉体の製造方法であって、
前記鉄系粉末として、累積頻度80%における円形度Rが0.75以上を示す鉄系粉末を使用して、圧粉密度が5.3g/cm 3 以上でかつ7.2g/cm 3 以下の前記摺動部品用圧粉体を成形する工程と、
前記摺動部品用圧粉体を構成している状態の前記鉄系粉末の表面に水蒸気処理を施すことで、前記鉄系粉末の間に前記酸化物皮膜を形成する工程とを備える、摺動部品用圧粉体の製造方法。
ここで、前記円形度Rは、前記鉄系粉末の二次元投影面積をS、二次元投影周長をLとした場合、数式5で表される。
- 鉄系粉末を主原料とする原料粉末を圧縮成形することで得られる圧粉体であって、前記圧粉体を構成する前記鉄系粉末の間に酸化物皮膜が形成され、これにより前記鉄系粉末が相互に結合されている摺動部品用圧粉体の製造方法であって、
前記鉄系粉末として、累積頻度80%における凹凸度Cが2.90未満を示す鉄系粉末を使用して、圧粉密度が5.3g/cm 3 以上でかつ7.2g/cm 3 以下の前記摺動部品用圧粉体を成形する工程と、
前記摺動部品用圧粉体を構成している状態の前記鉄系粉末の表面に水蒸気処理を施すことで、前記鉄系粉末の間に前記酸化物皮膜を形成する工程とを備える、摺動部品用圧粉体の製造方法。
ここで、前記凹凸度Cは、前記鉄系粉末の二次元投影面積をS、二次元投影周長をLとした場合、数式6で表される。
- 前記鉄系粉末の表面に対する水蒸気処理を、400℃以上でかつ700℃以下の温度域で行う請求項8又は9に記載の摺動部品用圧粉体の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014257337A JP6502085B2 (ja) | 2014-12-19 | 2014-12-19 | 圧粉体及びその製造方法 |
US15/533,716 US20170343044A1 (en) | 2014-12-19 | 2015-11-20 | Green compact and method for producing same |
PCT/JP2015/082711 WO2016098525A1 (ja) | 2014-12-19 | 2015-11-20 | 圧粉体及びその製造方法 |
DE112015005679.3T DE112015005679T5 (de) | 2014-12-19 | 2015-11-20 | Grüner Pressling und Verfahren zu seiner Herstellung |
CN201580066700.3A CN107000055B (zh) | 2014-12-19 | 2015-11-20 | 粉体压坯及其制造方法 |
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US11428266B2 (en) * | 2016-09-06 | 2022-08-30 | Ntn Corporation | Slide bearing |
KR102647523B1 (ko) * | 2016-11-16 | 2024-03-13 | 재단법인 포항산업과학연구원 | 철계 분말 및 이의 제조방법 |
CN112014297B (zh) * | 2020-09-22 | 2024-04-02 | 中建西部建设西南有限公司 | 一种机制砂颗粒粒形的评价方法 |
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FR2487235B1 (ja) * | 1980-07-25 | 1983-05-13 | Metafran Alliages Frittes | |
JPS61276901A (ja) * | 1985-05-31 | 1986-12-06 | Tadashi Ijima | 多孔質磁石の製造法 |
US5506557A (en) * | 1992-03-18 | 1996-04-09 | Sumitomo Special Metals Company, Limited | Radial anisotropic cylinder type ferrite magnets and their manufacturing methods and motors |
JPH0633111A (ja) * | 1992-07-13 | 1994-02-08 | Shiyoutarou Morozumi | 多孔体の製造方法 |
CN100387381C (zh) * | 2003-07-23 | 2008-05-14 | 上海材料研究所 | 一种粉末原料制造球形体的方法 |
CN101840762A (zh) * | 2009-03-16 | 2010-09-22 | 长沙骅骝冶金粉末有限公司 | 一种含硼铁硅的软磁材料的制作方法 |
JP2012052167A (ja) * | 2010-08-31 | 2012-03-15 | Toyota Motor Corp | 焼結用鉄基混合粉末及び鉄基焼結合金 |
CN103170347B (zh) * | 2011-12-21 | 2015-01-21 | 北京有色金属研究总院 | 低成本FeMnNi粉末触媒及制备方法和应用 |
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DE112015005679T5 (de) | 2017-09-14 |
JP2016117926A (ja) | 2016-06-30 |
WO2016098525A1 (ja) | 2016-06-23 |
CN107000055A (zh) | 2017-08-01 |
US20170343044A1 (en) | 2017-11-30 |
CN107000055B (zh) | 2019-10-22 |
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