JP6523682B2 - 焼結軸受 - Google Patents
焼結軸受 Download PDFInfo
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- JP6523682B2 JP6523682B2 JP2014265247A JP2014265247A JP6523682B2 JP 6523682 B2 JP6523682 B2 JP 6523682B2 JP 2014265247 A JP2014265247 A JP 2014265247A JP 2014265247 A JP2014265247 A JP 2014265247A JP 6523682 B2 JP6523682 B2 JP 6523682B2
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- 239000000843 powder Substances 0.000 claims description 67
- 229910045601 alloy Inorganic materials 0.000 claims description 63
- 239000000956 alloy Substances 0.000 claims description 63
- 229910002482 Cu–Ni Inorganic materials 0.000 claims description 48
- 239000010949 copper Substances 0.000 claims description 46
- 229910052782 aluminium Inorganic materials 0.000 claims description 34
- 150000001875 compounds Chemical class 0.000 claims description 33
- 239000002994 raw material Substances 0.000 claims description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- 229910018182 Al—Cu Inorganic materials 0.000 claims description 24
- 239000000446 fuel Substances 0.000 claims description 23
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000011159 matrix material Substances 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 239000010439 graphite Substances 0.000 claims description 16
- 229910000906 Bronze Inorganic materials 0.000 claims description 15
- 239000010974 bronze Substances 0.000 claims description 15
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- 229910018507 Al—Ni Inorganic materials 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000012071 phase Substances 0.000 description 79
- 238000005260 corrosion Methods 0.000 description 31
- 230000007797 corrosion Effects 0.000 description 31
- 238000005245 sintering Methods 0.000 description 29
- 230000002093 peripheral effect Effects 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 13
- 229910017518 Cu Zn Inorganic materials 0.000 description 12
- 229910017758 Cu-Si Inorganic materials 0.000 description 12
- 229910017752 Cu-Zn Inorganic materials 0.000 description 12
- 229910017931 Cu—Si Inorganic materials 0.000 description 12
- 229910017943 Cu—Zn Inorganic materials 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 238000002156 mixing Methods 0.000 description 11
- 239000010687 lubricating oil Substances 0.000 description 10
- 238000001556 precipitation Methods 0.000 description 10
- 239000002344 surface layer Substances 0.000 description 10
- 239000011701 zinc Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 6
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 6
- 238000007654 immersion Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 150000007524 organic acids Chemical class 0.000 description 6
- 238000004513 sizing Methods 0.000 description 6
- 229910001634 calcium fluoride Inorganic materials 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 229910001096 P alloy Inorganic materials 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 239000002551 biofuel Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 150000004763 sulfides Chemical class 0.000 description 4
- 229910018125 Al-Si Inorganic materials 0.000 description 3
- 229910018137 Al-Zn Inorganic materials 0.000 description 3
- 229910018520 Al—Si Inorganic materials 0.000 description 3
- 229910018573 Al—Zn Inorganic materials 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910017755 Cu-Sn Inorganic materials 0.000 description 2
- 229910017927 Cu—Sn Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- 229910017767 Cu—Al Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- -1 etc.) Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/01—Alloys based on copper with aluminium 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
- 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
- F16C33/121—Use of special materials
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/74—Protection from damage, e.g. shielding means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- 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
- F16C33/1095—Construction relative to lubrication with solids as lubricant, e.g. dry coatings, powder
-
- 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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/50—Lubricating properties
- F16C2202/52—Graphite
-
- 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
-
- 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
- F16C2204/20—Alloys based on aluminium
-
- 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
-
- 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
- F16C2360/00—Engines or pumps
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
-
- 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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/91—Valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Sliding-Contact Bearings (AREA)
- Powder Metallurgy (AREA)
Description
α(%)=(ρ1/ρ0)×100
ただし、ρ1:多孔質体の密度、ρ0:その多孔質体に空孔がないと仮定した場合の密度
また、焼結軸受1の表層とは、焼結軸受1の表面から、焼結軸受1の内径の1/100〜1/15の深さまでの領域とする。
混合工程では、各種粉末を混合機で混合することで、原料粉末が生成される。原料粉末は、Al源、Cu源、Ni源、P源、及び固体潤滑剤となる粉末を含む。原料粉末には、純Cu粉末や純Al粉末は含まれない。原料粉末には、必要に応じて、さらに、焼結助剤としてのフッ化アルミニウム及びフッ化カルシウム粉末や、離型用潤滑剤としてのステアリン酸亜鉛又はステアリン酸カルシウムが混合される。以下、各粉末について詳しく説明する。
圧粉工程では、上記の原料粉末を圧粉金型に充填して圧縮することにより、焼結軸受1と略同じ形状をなした圧粉体を形成する。本実施形態では、圧粉金型に充填した原料粉末を200〜700MPaの加圧力で圧縮することにより圧粉体を成形する。尚、圧粉金型を70℃以上に加温した状態で、圧粉体を成形してもよい。
焼結工程では、圧粉体を所定の焼結温度で加熱し、隣接する原料粉末同士を焼結結合させることによって焼結体を形成する。焼結工程は、例えば、メッシュベルト式連続炉を用いて行われる。圧粉体を加熱することで、隣接するAl−Ni−Cu合金粉末(Al−Cu−Ni合金組織)同士が焼結結合(拡散接合)し、焼結体が形成される。このとき、原料粉末に含まれるP成分により、Al−Cu−Ni合金組織同士の焼結が促進され、焼結体の強度が高められる。また、原料粉末中の黒鉛粉末は、焼結体の内部及び表面に遊離黒鉛として残存する。
サイジング工程では、焼結により膨張した焼結体を圧縮して寸法整形する。具体的には、焼結体の内周にコアロッドを挿入すると共に、上下パンチで焼結体の軸方向幅を所定寸法に規定した状態で、これらを一体的にダイの内周に圧入する。これにより、焼結体の外周面がダイで圧迫されて成形されると共に、焼結体の内周面がコアロッドの外周面に押し付けられて成形される。このサイジング工程により、膨張した焼結体の表層が圧縮され、表層の密度が内部の密度よりも大きくなる。また、焼結体の外周面側の表層は、内周面側の表層よりも圧縮量が大きくなるため、外周面側の表層の密度が内周面側の密度よりも大きくなる。尚、サイジング工程の後、焼結体の内周面1aにさらに回転サイジングすることで、内周面1a(軸受面)に開口した空孔をさらに小さくしてもよい。
含油工程では、上記の焼結体の内部空孔に潤滑油が含浸される。具体的には、減圧環境下で焼結体を潤滑油中に浸漬した後、常圧に戻すことで、焼結体の内部空孔に潤滑油が含浸される。以上により、焼結軸受1が完成する。
7〜11質量%Alを含むAl−Cu−Ni合金粉を含む原料粉末を用いて作成した焼結体からなり、Alを8.5質量%、Niを3.0質量%(実施例1)あるいは5.0質量%(実施例2)含み、残部の主成分がCuである。この焼結体に生成されたAl−Cu−Ni合金組織には、Al−Cu−Niマトリクス相(α相)と、Al−Ni化合物相(κ相)の析出が確認された(図3参照)。また、Al−Cu化合物相(γ相)の析出は確認されなかった。
7〜11質量%Alを含むAl−Cu−Si合金粉を含む原料粉末を用いて作成した焼結体からなり、Alを8.5質量%、Siを2.0質量%含み、残部の主成分がCuである。この焼結体に生成されたAl−Cu−Si合金組織には、Al−Cu−Siマトリクス相(α相)と、Al−Si化合物相(δ相,κ相)の析出が確認された(図4参照)。また、Al−Cu化合物相(γ相)の析出は確認されなかった。
7〜11質量%Alを含むAl−Cu−Zn合金粉を含む原料粉末を用いて作成した焼結体からなり、Alを8.5質量%、Znを3.0質量%(実施例3)あるいは5.0質量%(比較例1)含み、残部の主成分がCuである。この焼結体に生成されたAl−Cu−Ni合金組織には、Al−Cu−Znマトリクス相(α相)と、Al−Zn化合物相(δ相)の析出が確認された(図5参照)。また、Al−Cu化合物相(γ相)の析出は確認されなかった。
Cu粉末及びNi粉末を主に含む原料粉末を用いて作成した焼結体からなり、Niを30〜35質量%含む。
7〜11質量%Alを含むAl−Cu合金粉を含む原料粉末を用いて作成した焼結体からなり、Alを8.5質量%含み、残部の主成分がCuである。この焼結体に生成されたAl−Cu合金組織には、Al−Cuマトリクス相(α相)とAl−Cu化合物相(γ相)の析出が確認された(図8参照)。
7〜11質量%Alを含むAl−Cu合金粉と、Sn粉末とを含む原料粉末を用いて作成した焼結体からなり、Alを8.5質量%、Snを3.0質量%含み、残部の主成分がCuである。この焼結体に生成されたAl−Cu−Sn合金組織には、Al−Cu−Znマトリクス相(α相)とAl−Cu化合物相(γ相)の析出が確認された。
2 軸
3 Al−Cu−Ni合金組織
4 内部空孔
5 酸化アルミニウム被膜
6 遊離黒鉛
10 電動燃料ポンプ
30 EGRバルブ
Claims (6)
- Al、Cu、及びNiを含み、Al−Cu−Ni合金組織同士が焼結されたアルミ青銅系の焼結金属からなる焼結軸受であって、
前記Al−Cu−Ni合金組織には、Al−Cu−Niマトリクス相及びAl−Ni化合物相が析出し、Al−Cu化合物相は析出していない焼結軸受。 - Alを7〜11質量%、Niを1〜6質量%含み、残部の主成分をCuとした請求項1記載の焼結軸受。
- 原料粉末が純銅粉末を含まない請求項1又は2に記載の焼結軸受。
- 軸受面に遊離黒鉛を露出させた請求項1〜3の何れかに記載の焼結軸受。
- 請求項1〜4の何れかに記載の焼結軸受と、前記焼結軸受の内周に挿入され、回転自在に支持される軸と、前記軸に固定されたポンプインペラとを備えた燃料ポンプ。
- 請求項1〜4の何れかに記載の焼結軸受と、前記焼結軸受の内周に挿入され、軸方向移動自在に支持される軸を有するバルブとを備えたEGRバルブ。
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DE112015005771.4T DE112015005771T5 (de) | 2014-12-26 | 2015-12-01 | Gesintertes Lager |
CN201580068407.0A CN107000062B (zh) | 2014-12-26 | 2015-12-01 | 烧结轴承 |
US15/533,738 US10697494B2 (en) | 2014-12-26 | 2015-12-01 | Sintered bearing |
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JP7216842B2 (ja) * | 2019-12-11 | 2023-02-01 | 株式会社ダイヤメット | Cu-Ni-Al系焼結合金の製造方法 |
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JPH04131339A (ja) * | 1990-09-20 | 1992-05-06 | Mitsubishi Materials Corp | 耐摩耗性に優れた銅基焼結合金 |
JP3146529B2 (ja) * | 1991-07-29 | 2001-03-19 | 住友電気工業株式会社 | 高精度アルミニウム合金摺動部品の製造方法 |
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JPWO2004073145A1 (ja) | 2003-02-14 | 2006-06-01 | 三菱電機株式会社 | 直流電動機式燃料ポンプ |
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JP5024650B2 (ja) | 2006-05-17 | 2012-09-12 | 株式会社デンソー | 燃料ポンプ |
JP2009007650A (ja) * | 2007-06-29 | 2009-01-15 | Fukuda Metal Foil & Powder Co Ltd | 焼結アルミニウム含有銅合金用混合粉末及びその製造方法 |
JP5384014B2 (ja) * | 2008-02-21 | 2014-01-08 | Ntn株式会社 | 焼結軸受 |
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JP2013023732A (ja) * | 2011-07-21 | 2013-02-04 | Fukuda Metal Foil & Powder Co Ltd | Al青銅焼結合金摺動材料およびその製造方法 |
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