JPH05140688A - Al alloy material excellent in high temperature fatigue strength - Google Patents
Al alloy material excellent in high temperature fatigue strengthInfo
- Publication number
- JPH05140688A JPH05140688A JP30640991A JP30640991A JPH05140688A JP H05140688 A JPH05140688 A JP H05140688A JP 30640991 A JP30640991 A JP 30640991A JP 30640991 A JP30640991 A JP 30640991A JP H05140688 A JPH05140688 A JP H05140688A
- Authority
- JP
- Japan
- Prior art keywords
- fatigue strength
- alloy
- high temperature
- alloy material
- strength
- 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.)
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- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、180 ℃程度の高温にお
いて優れた疲労強度を有するＡｌ合金材に関する。FIELD OF THE INVENTION The present invention relates to an Al alloy material having excellent fatigue strength at a high temperature of about 180 ° C.
【０００２】[0002]
【従来の技術】自動車あるいは農機等のディーゼルある
いはガソリンエンジンに使用される連接棒は、100 〜18
0 ℃程度の温度下で往復運動、回転運動を繰り返すた
め、かかる高温下の運動に耐える引張強度・疲労強度を
有するものでなければならず、従来、鋼材によって製作
されている。2. Description of the Related Art Connecting rods used in diesel or gasoline engines of automobiles or agricultural machines are 100 to 18
Since the reciprocating motion and the rotary motion are repeated at a temperature of about 0 ° C., it must have tensile strength and fatigue strength that can withstand the motion under such high temperature, and is conventionally made of steel.
【０００３】一方、自動車等の軽量化、省エネルギー化
の見地から連接棒等の部品についても軽量化が望まれて
おり、高温強度に比較的優れたJIS 2000番系列の高力Ａ
ｌ合金の使用が試みられている。On the other hand, from the viewpoint of weight saving and energy saving of automobiles and the like, weight reduction of parts such as connecting rods is also desired, and JIS 2000 series high strength A relatively excellent in high temperature strength.
1 alloys have been attempted.
【０００４】[0004]
【発明が解決しようとする課題】前記高力Ａｌ合金の使
用により、軽量化が図られたものの、高温下では十分な
疲労強度を有していないのが実状である。本発明は、か
かる問題に鑑みなされたもので、180 ℃程度の高温にお
いて、優れた疲労強度を有するＡｌ合金を提供すること
を目的とする。Although the use of the high-strength Al alloy has made it possible to reduce the weight, the fact is that it does not have sufficient fatigue strength at high temperatures. The present invention has been made in view of the above problems, and an object thereof is to provide an Al alloy having excellent fatigue strength at a high temperature of about 180 ° C.
【０００５】[0005]
【課題を解決するための手段】本発明のＡｌ合金材は、
化学組成が重量％で、Ｓｉ： 0.3〜1.5 ％、 Ｃｕ：
4〜6 ％、 Ｆｅ： 0.5〜1.5 ％、Ｍｇ： 1.5〜2.5
％、 Ｍｎ： 3〜6 ％、Ｚｒ，Ｔｉ，Ｃｒ，Ｍｏ：単
独又は複合で 0.5〜1.5 ％、および残部実質的にＡｌか
らなるＡｌ急冷凝固粉末の押出材もしくは鍛造材で構成
したものである。また、前記Ａｌ合金材のＭｎ： 3〜6
％に代えて、Ｎｉ： 6〜12％としたものである。The Al alloy material of the present invention comprises:
Chemical composition is wt%, Si: 0.3-1.5%, Cu:
4-6%, Fe: 0.5-1.5%, Mg: 1.5-2.5
%, Mn: 3 to 6%, Zr, Ti, Cr, Mo: 0.5 to 1.5% alone or in combination, and the balance being an extruded or forged Al rapidly solidified powder consisting essentially of Al. .. Further, Mn of the Al alloy material: 3 to 6
%, Ni: 6 to 12%.
【０００６】[0006]
【作用】本発明のＡｌ合金材の化学組成（単位wt％)
は、以下の理由により限定される。 Ｓｉ： 0.3〜1.5 ％ ＳｉはＡｌ−Ｍｇ−Ｓｉ系、Ａｌ−Ｓｉ−Ｃｕ系あるい
はＡｌ−Ｍｎ−Ｓｉ系の析出物を生成し強度向上に寄与
するが、0.3 ％未満ではその効果は少なく、一方1.5 ％
を越えると析出物が粗大化し、疲労強度の低下を招来す
る。[Function] Chemical composition of the Al alloy material of the present invention (unit: wt%)
Is limited for the following reasons. Si: 0.3 to 1.5% Si forms Al-Mg-Si-based, Al-Si-Cu-based or Al-Mn-Si-based precipitates and contributes to strength improvement, but if less than 0.3%, its effect is small, On the other hand, 1.5%
If it exceeds, the precipitates become coarse and the fatigue strength decreases.
【０００７】Ｃｕ： 4〜6 ％ Ｍｇ： 1.5〜2.5 ％ Ｃｕ、ＭｇはＳｉと共に金属間化合物を生成し、強度の
向上に寄与するが、Ｃｕ 4％未満、Ｍｇ 1.5％未満では
その効果が不足し、一方Ｃｕ 6％を越え、Ｍｇ 2.5％を
越えると析出物が粗大化し、疲労強度の低下を招来す
る。Cu: 4 to 6% Mg: 1.5 to 2.5% Cu and Mg form an intermetallic compound together with Si and contribute to the improvement of strength, but if less than 4% Cu and less than 1.5% Mg, the effect is insufficient. On the other hand, if the Cu content exceeds 6% and the Mg content exceeds 2.5%, the precipitates become coarse and the fatigue strength decreases.
【０００８】Ｆｅ： 0.5〜1.5 ％ Ｍｎ： 3〜6 ％ Ｆｅ、ＭｎはＡｌ−Ｆｅ−Ｓｉ系あるいはＡｌ−Ｍｎ−
Ｓｉ系の金属間化合物を形成し、高温強度を向上させる
が、Ｆｅ 0.5％未満、Ｍｎ 3％未満ではその効果が少な
く、一方Ｆｅ 1.5％を越え、Ｍｎ 6％を越えると時効硬
化能を低下させ、強度の低下を招来する。Fe: 0.5 to 1.5% Mn: 3 to 6% Fe and Mn are Al-Fe-Si or Al-Mn-
It forms a Si-based intermetallic compound and improves the high temperature strength, but if it is less than 0.5% Fe and less than 3% Mn, its effect is small, while if it exceeds 1.5% Fe and more than 6% Mn, the age hardening ability decreases. Cause a decrease in strength.
【０００９】Ｚｒ，Ｔｉ，Ｃｒ，Ｍｏ：単独又は複合で
0.5〜1.5％ これらの元素はＡｌと微細な金属間化合物を生成し、高
温強度を維持し、疲労強度の向上に寄与する。 0.5％未
満ではその効果が期待できず、一方 1.5％を越えると伸
びが低下し成形が困難になる。本発明の他のＡｌ合金材
は、前記合金成分において、Ｍｎ： 3〜6 ％の代わり
に、Ｎｉ： 6〜12％としたものである。ＮｉはＡｌ−Ｆ
ｅ−Ｎｉ系の金属間化合物を形成し、高温強度を向上さ
せるが、 6％未満ではかかる効果が期待できず、一方12
％を越えると時効硬化能を低下させる。Zr, Ti, Cr, Mo: alone or in combination
0.5 to 1.5% These elements form a fine intermetallic compound with Al, maintain high temperature strength, and contribute to improvement of fatigue strength. If it is less than 0.5%, the effect cannot be expected. On the other hand, if it exceeds 1.5%, the elongation is lowered and molding becomes difficult. In another Al alloy material of the present invention, Ni: 6 to 12% is used instead of Mn: 3 to 6% in the above alloy components. Ni is Al-F
It forms an e-Ni intermetallic compound and improves the high temperature strength, but if it is less than 6%, such an effect cannot be expected.
If it exceeds%, the age hardening ability is lowered.
【００１０】以上の合金成分のほか、残部は不可避的に
混入した不純物とＡｌ、すなわち実質的にＡｌである。
上記組成のＡｌ合金急冷凝固粉末は、合金元素を過飽和
に固溶して基地の固溶強化が図られ、また結晶粒の微細
化により基地の強化が図られる。前記Ａｌ合金急冷凝固
粉末の押出材もしくは鍛造材は、同加工による強度のせ
ん断作用によって、粉末表面に形成されている数Å程度
の不活性、安定なＡｌ酸化物被膜の分断が行われると共
に、粉末同士が一体化され、一体化された基地中に前記
分断されたＡｌ酸化物片が均一に分散したものとなる。In addition to the above alloy components, the balance consists of impurities inevitably mixed with Al, that is, substantially Al.
The Al alloy rapidly solidified powder having the above-mentioned composition solidifies the alloy elements in a supersaturated state to strengthen the solid solution of the matrix, and further refines the crystal grains to strengthen the matrix. The extruded material or the forged material of the Al alloy rapidly solidified powder is subjected to a strong shearing action by the same processing, so that the inert and stable Al oxide film formed on the powder surface is divided into several Å, and The powders are integrated with each other, and the divided Al oxide pieces are uniformly dispersed in the integrated matrix.
【００１１】[0011]
【実施例】本発明のＡｌ合金材の原料となる所定成分の
Ａｌ合金急冷凝固粉末は、水アトマイズ法や回転ドラム
法等の適宜の手段で104 ／℃程度以上の冷却速度で急冷
されて製造される。回転ドラム法とは、回転する冷却ド
ラムの内周面に冷却水層を遠心力の作用で形成し、該冷
却水層に溶融Ａｌ合金を噴射し、微細に分断して急冷凝
固粉末を得る方法である。EXAMPLE An Al alloy rapidly solidified powder of a predetermined component which is a raw material of an Al alloy material of the present invention is rapidly cooled at a cooling rate of about 10 4 / ° C. or more by an appropriate means such as a water atomizing method or a rotating drum method. Manufactured. The rotating drum method is a method in which a cooling water layer is formed on the inner peripheral surface of a rotating cooling drum by the action of centrifugal force, a molten Al alloy is injected into the cooling water layer, and finely divided to obtain a rapidly solidified powder. Is.
【００１２】Ａｌ合金急冷凝固粉末は、粉末の状態で、
あるいは圧縮成形ビレットとして押出しコンテナに収容
され、押出し加工に供される。押出に際して、Ａｌ合金
粉末表面のＡｌ酸化物被膜の分断、分散や粉末の基地
（Ａｌ固溶体）同士の一体化を十分行うために、押出比
は 5〜20程度とするのがよく、また押出荷重の軽減およ
び基地の拡散接合のために、押出温度は 400〜500 ℃程
度とするのがよい。The Al alloy rapidly solidified powder is in the powder state,
Alternatively, it is housed in an extrusion container as a compression-molded billet and subjected to extrusion processing. At the time of extrusion, the extrusion ratio is preferably about 5 to 20 in order to sufficiently divide and disperse the Al oxide film on the surface of the Al alloy powder and integrate the powder bases (Al solid solution) with each other. The extrusion temperature is preferably about 400 to 500 ° C. in order to reduce the temperature and diffusion-bond the matrix.
【００１３】本発明の合金材は、押出し加工のほか鍛造
加工により押出し加工時と同等の作用がなされ、所期の
合金組織を得ることができる。この際、鍛造温度は 300
℃〜550 ℃程度がよい。以上のようにして得られた押出
材もしくは鍛造材は、適宜、鍛造加工、切削加工等によ
り目的とする製品と近似した形状に加工される。また、
予備加工後、必要に応じて 450〜510 ℃程度で溶体化処
理し、水冷した後、自然時効あるいは人工時効を適宜行
う。The alloy material of the present invention has the same function as that of the extrusion process by the extrusion process as well as the forging process, and the desired alloy structure can be obtained. At this time, the forging temperature is 300
℃ ~ 550 ℃ is good. The extruded material or forged material obtained as described above is appropriately processed into a shape similar to the intended product by forging, cutting or the like. Also,
After pre-processing, if necessary, solution treatment is performed at about 450-510 ° C, water cooling, and natural aging or artificial aging is appropriately performed.
【００１４】次に具体的実施例について説明する。 (1) 下記表１の化学組成（wt％、残部実質的にＡｌ) の
Ａｌ合金を溶製し、回転ドラム法によって、粒径0.05〜
1 mmの急冷凝固粉末を作成した。尚、試料 No.１および
２は本発明実施例であり、 No.３は比較例で、 No.４は
従来例でJIS 2017Ａｌ合金である。 (2) No.１〜４の急冷凝固粉末を押出比25、押出温度 4
50℃で押出し、φ25mmの棒材を得た。 (3) この押出材より試験片を採取し、 500℃で溶体化処
理し、水冷後、自然時効した後、室温および200 ℃にお
ける引張強さおよび疲労強度を測定した。その結果を表
１に併せて示す。尚、疲労強度は、形状係数αK ＝2 、
Ｎ（繰り返し数）＝107 回のときの値である。Next, specific examples will be described. (1) An Al alloy having the chemical composition shown in Table 1 below (wt%, the balance being substantially Al) was melted, and a grain size of 0.05 to
A 1 mm rapidly solidified powder was prepared. Sample Nos. 1 and 2 are examples of the present invention, No. 3 is a comparative example, and No. 4 is a conventional example, which is a JIS 2017 Al alloy. (2) No. 1 to 4 rapidly solidified powders with an extrusion ratio of 25 and extrusion temperature of 4
It was extruded at 50 ° C. to obtain a rod having a diameter of 25 mm. (3) A test piece was sampled from this extruded material, subjected to solution treatment at 500 ° C, cooled with water, and naturally aged. Then, the tensile strength and fatigue strength at room temperature and 200 ° C were measured. The results are also shown in Table 1. The fatigue strength is the shape factor α K = 2,
It is a value when N (number of repetitions) = 10 7 times.
【００１５】[0015]
【表１】 [Table 1]
【００１６】(4) 評価 表１より、実施例に係る No.１および２は、JIS 2017材
に相当する No.４に比らべて、常温引張強度の向上は勿
論のこと、 200℃における疲労強度が40〜50％程度と著
しい高温強度の向上が認められる。一方、Ｍｎ量の少な
い比較例 No.３では、疲労強度の向上は10％程度に止ま
った。(4) Evaluation From Table 1, it can be seen that No. 1 and No. 2 according to the example are improved in room temperature tensile strength as compared with No. 4 corresponding to JIS 2017 material at 200 ° C. Fatigue strength is about 40 to 50%, showing remarkable improvement in high temperature strength. On the other hand, in Comparative Example No. 3 in which the amount of Mn was small, the improvement in fatigue strength was only about 10%.
【００１７】[0017]
【発明の効果】以上説明した通り、本発明のＡｌ合金材
は、Ｍｎを３〜６％又はＮｉを６〜12％含有した特定組
成のＡｌ合金急冷凝固粉末の押出材もしくは鍛造材であ
るので、従来の2000番系列のＡｌ合金に比べて、室温の
みならず、 180℃程度の高温における引張強度、疲労強
度の大幅な向上を期待することができ、軽量高温高強度
材として優れる。As described above, the Al alloy material of the present invention is an extruded or forged material of an Al alloy rapidly solidified powder having a specific composition containing 3 to 6% Mn or 6 to 12% Ni. Compared with the conventional 2000 series Al alloy, not only room temperature but also high tensile strength and fatigue strength at high temperature of about 180 ° C can be expected to be greatly improved, and it is excellent as a lightweight high temperature high strength material.
Claims (2)
0.5〜1.5 ％、Ｍｇ： 1.5〜2.5 ％、 Ｍｎ： 3〜6
％、Ｚｒ，Ｔｉ，Ｃｒ，Ｍｏ：単独又は複合で 0.5〜1.
5 ％、および残部実質的にＡｌからなるＡｌ急冷凝固粉
末の押出材もしくは鍛造材であることを特徴とする高温
疲労強度に優れたＡｌ合金材。1. The chemical composition is wt%, Si: 0.3 to 1.5%, Cu: 4 to 6%, Fe:
0.5 to 1.5%, Mg: 1.5 to 2.5%, Mn: 3 to 6
%, Zr, Ti, Cr, Mo: 0.5-1.
An Al alloy material excellent in high temperature fatigue strength, which is an extruded material or a forged material of an Al rapidly solidified powder consisting of 5% and the balance substantially consisting of Al.
0.5〜1.5 ％、Ｍｇ： 1.5〜2.5 ％、 Ｎｉ： 6〜12
％、Ｚｒ，Ｔｉ，Ｃｒ，Ｍｏ：単独又は複合で 0.5〜1.
5 ％、および残部実質的にＡｌからなるＡｌ急冷凝固粉
末の押出材もしくは鍛造材であることを特徴とする高温
疲労強度に優れたＡｌ合金材。2. The chemical composition is wt%, Si: 0.3-1.5%, Cu: 4-6%, Fe:
0.5-1.5%, Mg: 1.5-2.5%, Ni: 6-12
%, Zr, Ti, Cr, Mo: 0.5-1.
An Al alloy material excellent in high temperature fatigue strength, which is an extruded material or a forged material of an Al rapidly solidified powder consisting of 5% and the balance substantially consisting of Al.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30640991A JPH05140688A (en) | 1991-11-21 | 1991-11-21 | Al alloy material excellent in high temperature fatigue strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30640991A JPH05140688A (en) | 1991-11-21 | 1991-11-21 | Al alloy material excellent in high temperature fatigue strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05140688A true JPH05140688A (en) | 1993-06-08 |
Family
ID=17956672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30640991A Pending JPH05140688A (en) | 1991-11-21 | 1991-11-21 | Al alloy material excellent in high temperature fatigue strength |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05140688A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138614A1 (en) * | 2007-05-16 | 2008-11-20 | Technische Universität Clausthal | Use of an al-mn alloy for high temperature resistant products |
| WO2011032434A1 (en) * | 2009-09-18 | 2011-03-24 | 贵州华科铝材料工程技术研究有限公司 | High-strength heat-proof aluminum alloy material containing molybdenum and rare earth and producing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62142741A (en) * | 1985-12-18 | 1987-06-26 | Nippon Light Metal Co Ltd | High-strength aluminum alloy excellent in fatigue-resisting strength |
| JPH0234740A (en) * | 1988-07-25 | 1990-02-05 | Furukawa Alum Co Ltd | Heat-resistant aluminum alloy material and its manufacture |
| JPH0379738A (en) * | 1989-08-23 | 1991-04-04 | Kubota Corp | High strength al alloy material |
-
1991
- 1991-11-21 JP JP30640991A patent/JPH05140688A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62142741A (en) * | 1985-12-18 | 1987-06-26 | Nippon Light Metal Co Ltd | High-strength aluminum alloy excellent in fatigue-resisting strength |
| JPH0234740A (en) * | 1988-07-25 | 1990-02-05 | Furukawa Alum Co Ltd | Heat-resistant aluminum alloy material and its manufacture |
| JPH0379738A (en) * | 1989-08-23 | 1991-04-04 | Kubota Corp | High strength al alloy material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138614A1 (en) * | 2007-05-16 | 2008-11-20 | Technische Universität Clausthal | Use of an al-mn alloy for high temperature resistant products |
| WO2011032434A1 (en) * | 2009-09-18 | 2011-03-24 | 贵州华科铝材料工程技术研究有限公司 | High-strength heat-proof aluminum alloy material containing molybdenum and rare earth and producing method thereof |
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