JPS63169351A - Composite cam shaft made of al alloy ceramics - Google Patents
Composite cam shaft made of al alloy ceramicsInfo
- Publication number
- JPS63169351A JPS63169351A JP31197886A JP31197886A JPS63169351A JP S63169351 A JPS63169351 A JP S63169351A JP 31197886 A JP31197886 A JP 31197886A JP 31197886 A JP31197886 A JP 31197886A JP S63169351 A JPS63169351 A JP S63169351A
- Authority
- JP
- Japan
- Prior art keywords
- alloy material
- wear resistance
- outer peripheral
- alloy
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 title claims abstract description 5
- 229910000838 Al alloy Inorganic materials 0.000 title abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 4
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- 229910018084 Al-Fe Inorganic materials 0.000 claims abstract 4
- 229910018192 Al—Fe Inorganic materials 0.000 claims abstract 4
- 229910001199 N alloy Inorganic materials 0.000 claims description 14
- 229910000765 intermetallic Inorganic materials 0.000 claims description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 239000012634 fragment Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、高強度かつ耐摩耗性に冨んだ軽量カムシャフ
トに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lightweight camshaft with high strength and wear resistance.
（従来の技術）
近年、エネルギ効率を改善するために、自動車や自動二
輪車等の輸送手段の各部品の軽量化が推進されており、
高強度のアルミ合金製部品の使用が著しい。(Prior art) In recent years, in order to improve energy efficiency, efforts have been made to reduce the weight of various parts of transportation vehicles such as automobiles and motorcycles.
Significant use of high-strength aluminum alloy parts.
（発明が解決しようとする問題点）
軽量化が望まれている部品のひとつに内燃機関に使用さ
れるカムシャフトがある。(Problems to be Solved by the Invention) Camshafts used in internal combustion engines are one of the parts for which weight reduction is desired.
しかしながら、カムシャフトには優れた強度と特にその
カム部外周面に優れた耐摩耗性とが要求されるために、
現在のところＮ合金による代替は不可能とされているの
が実情である。However, since camshafts are required to have excellent strength and especially excellent wear resistance on the outer peripheral surface of the cam part,
The reality is that it is currently impossible to replace it with N alloys.
本発明はかかる問題点に鑑みなされたもので、優れた強
度と必要とされる耐摩耗性とを兼備した軽量カムシャフ
トを提供することを目的とする。The present invention was made in view of these problems, and an object of the present invention is to provide a lightweight camshaft that has both excellent strength and required wear resistance.
（問題点を解決するための手段）
叙上の目的を達成するためになされた本発明のカムシャ
フトは、カム部とシャフト部がＮ合金材によって一体的
に成形されると共にカム部外周面にセラミックス層が接
合され、前記Ｎ合金材は重量％で
Ｆｅ：４〜１０％、 Ｚｎ：２〜１２％Ｔｉ：３％以
下、 希土類金属：３％以以下部実質的にＮで形成さ
れ、かつＮ基地中に酸化アルミニウムの微細片が均一に
分散されると共に、２μｍ以下のＡｔ−Ｆｅ金属間化合
物が均一に分散されていることを構成とするものである
。(Means for solving the problems) In the camshaft of the present invention, which has been made to achieve the above-mentioned objects, the cam portion and the shaft portion are integrally molded from an N alloy material, and the outer circumferential surface of the cam portion is The ceramic layer is bonded, and the N alloy material is substantially formed of N in terms of weight percent: Fe: 4 to 10%, Zn: 2 to 12%, Ti: 3% or less, rare earth metal: 3% or less, and The structure is such that fine pieces of aluminum oxide are uniformly dispersed in the N base, and At-Fe intermetallic compounds of 2 μm or less are uniformly dispersed.
（作 用）
本発明のカムシャフトは、特定組成、組織の高強度アル
ミ合金材で一体的に成形されているので、カムシャフト
に要求される所期の強度を満足することができる。(Function) Since the camshaft of the present invention is integrally molded from a high-strength aluminum alloy material having a specific composition and structure, it can satisfy the desired strength required for the camshaft.
また、前記Ｎ合金材には、Ｎ基地中に２μｍ以下のＡＩ
−Ｆ ｅ金属間化合物が均一に分散されているので、
カム部外周面にもこの金属間化合物の一部が微細かつ均
一に突出し、セラミックス層を強固にカム部外周面に接
合させることができ、所期の耐摩耗性を具備せしめるこ
とができる。In addition, the N alloy material has an AI of 2 μm or less in the N base.
-Fe Since the intermetallic compound is uniformly dispersed,
A portion of this intermetallic compound also protrudes finely and uniformly on the outer circumferential surface of the cam portion, allowing the ceramic layer to be firmly bonded to the outer circumferential surface of the cam portion, thereby providing the desired wear resistance.
（実施例）
まず、本発明のカムシャフトを形成するＮ合金材につい
て説明する。(Example) First, the N alloy material forming the camshaft of the present invention will be described.
Ｎ合金材の組成（重量％）およびその成分限定理由は下
記の通りである。The composition (weight %) of the N alloy material and the reasons for limiting the components are as follows.
Ｆｅ ： ４〜１０％
４％未満では強度が不足し、一方、１０％を越えると靭
性が不足するからである。Fe: 4-10% If it is less than 4%, the strength will be insufficient, while if it exceeds 10%, the toughness will be insufficient.
Ｚｎ ： ２〜１２％
ＺｎはＮ中におけるＦｅの固溶の均一化（Ｆｅ元素の分
布の均一化）に寄与するが、２％未満ではこの効果がほ
とんど期待できず、一方１２％を越えると靭性を劣化さ
せるためである。Zn: 2-12% Zn contributes to uniformity of solid solution of Fe in N (uniform distribution of Fe element), but if it is less than 2%, this effect can hardly be expected, while if it exceeds 12%, This is because it deteriorates toughness.
Ｔｉ、希土類金属：共に３％以下
両者は／Ｖ−Ｆｅ金属間化合物の析出肥大化の防止に寄
与するが、３％を越えると材質劣化を招来する。Ti and rare earth metals: 3% or less Both contribute to preventing the precipitation and enlargement of the /V-Fe intermetallic compound, but exceeding 3% leads to material deterioration.
本発明に係るＮ合金材は、以上の成分のほかに残部実質
的にＮで形成される。In addition to the above-mentioned components, the N alloy material according to the present invention is made of substantially N as the remainder.
Ｎ合金材の組織は、Ｎ基地中にＮ２Ｏ３やＡＩ （ＯＨ
）３等の緻密な酸化アルミニウムの微細片が均一に分散
されると共に２μｍ以下のＡｊ−Ｆｅ金属間化合物が均
一に分散されている。The structure of the N alloy material is such that N2O3 and AI (OH
)3 etc. are uniformly dispersed, and Aj-Fe intermetallic compounds of 2 μm or less are uniformly dispersed.
このような組織を得る−には、前記組成のＮ合金を溶製
し、これを１０３〜ｂ
冷凝固粉末を押出し成形することにより得られる。To obtain such a structure, an N alloy having the above composition is melted, and a cold solidified powder of 103-b is extruded.
急冷凝固粉末の表面には５０〜１００久程度の不活性、
緻密な酸化アルミニウム被膜が形成されているが、押出
成形時に、この被膜並びにＡｊ−Ｆｅ金属間化合物に強
力なせん新作用が及ぼされ、これらがＮ基地中に微細分
散される。Ａｆ−Ｐｅ金属間化合物は、被膜寸法に比べ
てかなり大きな析出物であるため、押出成形によって２
μｍ以下とされる。The surface of the rapidly solidified powder is inert for about 50 to 100 years.
A dense aluminum oxide film is formed, but during extrusion molding, a strong shearing action is exerted on this film and the Aj-Fe intermetallic compound, and these are finely dispersed in the N base. Since the Af-Pe intermetallic compound is a considerably large precipitate compared to the film size, it can be reduced by extrusion.
It is considered to be less than μm.
これらの被膜や析出物が基地中に微細分散される結果、
本発明に係るＮ合金材は、引張強さ６５ｋｇｆ ／ １
２以上、伸び５〜ｌＯ％を確保することができる。As a result of these films and precipitates being finely dispersed in the base,
The N alloy material according to the present invention has a tensile strength of 65 kgf/1
2 or more, it is possible to secure an elongation of 5 to 10%.
また、本発明に係るカムシャフトのカム部外周面には、
第１図および第２図のように、負荷が激しく作用する凸
状外周面にセラミックス層３，３ａが接合されている。Further, on the outer peripheral surface of the cam portion of the camshaft according to the present invention,
As shown in FIGS. 1 and 2, ceramic layers 3 and 3a are bonded to the convex outer peripheral surface on which a heavy load is applied.
カム部ｌ外周面には、２μｍ以下のＮ−Ｆｅ金属間化合
物の一部が３〜５μｍの間隔で突出しているため、セラ
ミックス層３，３ａが極めて強力に接合され、所期の耐
摩耗性が有効に確保される。On the outer circumferential surface of the cam part l, a part of the N-Fe intermetallic compound with a diameter of 2 μm or less protrudes at intervals of 3 to 5 μm, so the ceramic layers 3 and 3a are bonded extremely strongly, achieving the desired wear resistance. is effectively secured.
尚、第１図は、カム部１の凸状外周面にセラミックス層
３をコーティングしたもの、第２図は、半月状セラミッ
クス層３ａを固相接合したものである。セラミックスと
しては、Ｎ２Ｏ３やＣｒｚＣ，、等自由に選択すること
ができる。また、２はシャフト部であり、通常、カム部
の断面形状を有する押出材から削り出される。In addition, FIG. 1 shows a case in which a ceramic layer 3 is coated on the convex outer circumferential surface of the cam part 1, and FIG. 2 shows a case in which a half-moon-shaped ceramic layer 3a is solid-phase bonded. As the ceramic, N2O3, CrzC, etc. can be freely selected. Further, 2 is a shaft portion, which is usually machined from an extruded material having a cross-sectional shape of a cam portion.
（発明の効果）
以上説明した通り、本発明の複合カムシャフトは特定組
成、組織のＮ合金材を用いているので、高強度であり、
セラミックス層の接合性にも優れ、カム部外周面に耐摩
耗性に冨んだセラミックス層を強固に接合させることが
でき、高強度と耐摩耗性とを兼備させることができる。(Effects of the Invention) As explained above, the composite camshaft of the present invention uses an N alloy material with a specific composition and structure, so it has high strength.
The bondability of the ceramic layer is also excellent, and the ceramic layer rich in wear resistance can be firmly bonded to the outer circumferential surface of the cam part, making it possible to have both high strength and wear resistance.
従って、カムシャフトの機能を損なうことな（その軽量
化を図ることができる。Therefore, it is possible to reduce the weight of the camshaft without impairing its function.
第１図および第２図は本発明実施例に係る複合カムシャ
フトの正面図である。
１・−カム部、２−シャフト部、３，３ａ・−セラミッ
クス層。
特 許 出 願 人 久保田鉄工株式会社第 ノ 図
第２図1 and 2 are front views of a composite camshaft according to an embodiment of the present invention. 1.--Cam portion, 2--Shaft portion, 3, 3a.--Ceramics layer. Patent applicant: Kubota Iron Works Co., Ltd. Figure 2
Claims (1)
成形されると共にカム部外周面にセラミックス層が接合
され、前記Ｎ合金材は重量％でＦｅ：４〜１０％、Ｚｎ
：２〜１２％ Ｔｉ：３％以下、希土類金属：３％以下 残部実質的にＮで形成され、かつＮ基地中に酸化アルミ
ニウムの微細片が均一に分散されると共に、２μｍ以下
のＡｌ−Ｆｅ金属間化合物が均一に分散されていること
を特徴とするＮ合金セラミックス複合カムシャフト。(1) The cam part and the shaft part are integrally molded from an N alloy material, and a ceramic layer is bonded to the outer peripheral surface of the cam part, and the N alloy material contains Fe: 4 to 10%, Zn by weight%
: 2 to 12% Ti: 3% or less, rare earth metal: 3% or less The remainder is substantially formed of N, and fine pieces of aluminum oxide are uniformly dispersed in the N base, and Al-Fe of 2 μm or less An N alloy ceramic composite camshaft characterized by uniformly dispersed intermetallic compounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31197886A JPS63169351A (en) | 1986-12-29 | 1986-12-29 | Composite cam shaft made of al alloy ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31197886A JPS63169351A (en) | 1986-12-29 | 1986-12-29 | Composite cam shaft made of al alloy ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63169351A true JPS63169351A (en) | 1988-07-13 |
Family
ID=18023726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31197886A Pending JPS63169351A (en) | 1986-12-29 | 1986-12-29 | Composite cam shaft made of al alloy ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63169351A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0253102U (en) * | 1988-10-07 | 1990-04-17 | ||
| US5299881A (en) * | 1990-07-27 | 1994-04-05 | Mettler Friedli Karl | Assembly of a cylindrical body made to finished dimensions |
| US5449421A (en) * | 1988-03-09 | 1995-09-12 | Toyota Jidosha Kabushiki Kaisha | Aluminum alloy composite material with intermetallic compound finely dispersed in matrix among reinforcing elements |
-
1986
- 1986-12-29 JP JP31197886A patent/JPS63169351A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5449421A (en) * | 1988-03-09 | 1995-09-12 | Toyota Jidosha Kabushiki Kaisha | Aluminum alloy composite material with intermetallic compound finely dispersed in matrix among reinforcing elements |
| JPH0253102U (en) * | 1988-10-07 | 1990-04-17 | ||
| US5299881A (en) * | 1990-07-27 | 1994-04-05 | Mettler Friedli Karl | Assembly of a cylindrical body made to finished dimensions |
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