JPH06228697A - Rapidly solidified al alloy excellent in high temperature property - Google Patents
Rapidly solidified al alloy excellent in high temperature propertyInfo
- Publication number
- JPH06228697A JPH06228697A JP3456393A JP3456393A JPH06228697A JP H06228697 A JPH06228697 A JP H06228697A JP 3456393 A JP3456393 A JP 3456393A JP 3456393 A JP3456393 A JP 3456393A JP H06228697 A JPH06228697 A JP H06228697A
- Authority
- JP
- Japan
- Prior art keywords
- rapidly solidified
- high temperature
- allay
- eutectic
- dispersed
- 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
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、粉末やフレーク、あ
るいはリボンなどに急冷凝固され、粉末冶金法にて各種
構造部品に成形されて実用に供される高温特性のすぐれ
た急冷凝固Ａｌ合金に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapidly solidified Al alloy having excellent high-temperature characteristics, which is rapidly solidified into powder, flakes, ribbons or the like, and formed into various structural parts by powder metallurgy for practical use. It is a thing.
【０００２】[0002]
【従来の技術】従来、例えば特開昭６１−９６０５１号
公報に記載される通り、各種の急冷凝固Ａｌ合金が提案
され、これらの急冷凝固Ａｌ合金は、軽量にして、熱膨
脹係数が低く、かつ耐摩耗性にすぐれていることから、
これらの特性が要求されるコンロッドやピストン、バル
ブなどのエンジン部品、さらにコンプレッサのスクロー
ルやオイルポンプギアなど、自動車、航空機、家電、お
よび事務機器などの各種構造部品として注目されてい
る。2. Description of the Related Art Conventionally, various rapidly solidified Al alloys have been proposed as described in, for example, Japanese Patent Application Laid-Open No. 61-96051. These rapidly solidified Al alloys are light in weight and have a low coefficient of thermal expansion, and Because it has excellent wear resistance,
It has attracted attention as engine parts such as connecting rods, pistons, and valves that require these characteristics, as well as various structural parts for automobiles, aircraft, home appliances, and office equipment, such as compressor scrolls and oil pump gears.
【０００３】[0003]
【発明が解決しようとする課題】しかし、近年の自動車
や航空機、さらに各種電気電子機器などの高性能化はめ
ざましく、これに伴ない、これらの構造部品の使用条件
も一段と苛酷になり、特に高温環境下での使用を予儀な
くされるばかりでなく、より一層の軽量化および小型化
のために薄肉化が強く望まれる傾向にあるが、多くの従
来急冷凝固Ａｌ合金の場合、特に十分な高温特性（高温
強度および高温硬さ）を具備するものでないため、これ
らの要求に満足に対応することができない。However, in recent years, the performance of automobiles, aircrafts, and various electric and electronic devices has been remarkably improved, and along with this, the conditions of use of these structural parts have become more severe, especially at high temperatures. Not only is it less likely to be used in the environment, but thinning tends to be strongly desired for further weight reduction and downsizing, but in the case of many conventional rapidly solidified Al alloys, it is particularly sufficient. Since it does not have high-temperature characteristics (high-temperature strength and high-temperature hardness), these requirements cannot be satisfied satisfactorily.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、高温特性のすぐれた急冷凝固Ａ
ｌ合金を開発すべく研究を行なった結果、重量％で（以
下、％は重量％を示す）、Ｆｅ：５〜１２％、 Ｓ
ｉ：５〜９％、Ｃｒ、Ｍｏ、およびＮｂのうちの１種ま
たは２種以上：０．２〜５％、Ｂｅ：０．０２〜１％、
を含有し、残りがＡｌと不可避不純物からなる組成を有
するＡｌ合金溶湯を、アトマイズ法やメルトスピン法な
どの周知の急冷凝固手段にて粉末やフレーク、あるいは
リボンなどに急冷凝固すると、これらは素地に共晶Ｓｉ
とＡｌ−Ｆｅ−（Ｃｒ、Ｍｏ、Ｎｂ）−Ｓｉ系金属間化
合物が分散した組織をもつようになり、したがってこれ
を所定粒度の粉末に調整した状態で原料粉末として用
い、粉末冶金法にて所定の構造部品に成形すると、この
結果の構造部品はすぐれた高温特性を有し、かつ熱膨脹
係数も低く、苛酷な条件下での実用でもすぐれた特性を
長期に亘って発揮するという研究結果を得たのである。Therefore, the present inventors have
From the above viewpoints, rapid solidification A with excellent high temperature characteristics
As a result of conducting research to develop an L alloy, weight% (hereinafter,% means weight%), Fe: 5 to 12%, S
i: 5 to 9%, one or more of Cr, Mo, and Nb: 0.2 to 5%, Be: 0.02 to 1%,
Containing Al, and the remainder having a composition consisting of Al and unavoidable impurities, is rapidly solidified into powder, flakes, or ribbon by well-known rapid solidification means such as atomizing method and melt spin method. Eutectic Si
And an Al-Fe- (Cr, Mo, Nb) -Si intermetallic compound have a structure dispersed therein. Therefore, this is used as a raw material powder in a state of being adjusted to a powder having a predetermined particle size, and is subjected to a powder metallurgy method. According to the research result, when molded into a predetermined structural part, the resulting structural part has excellent high-temperature characteristics and a low coefficient of thermal expansion, and exhibits excellent characteristics for a long period of time even in practical use under severe conditions. I got it.
【０００５】この発明は、上記の研究結果にもとづいて
なされたものであって、Ｆｅ：５〜１２％、 Ｓｉ：
５〜９％、Ｃｒ、Ｍｏ、およびＮｂのうちの１種または
２種以上：０．２〜５％、Ｂｅ：０．０２〜１％、を含
有し、残りがＡｌと不可避不純物からなる組成、並びに
素地に共晶ＳｉとＡｌ−Ｆｅ−（Ｃｒ、Ｍｏ、Ｎｂ）−
Ｓｉ系金属間化合物が分散した組織を有する高温特性の
すぐれた急冷凝固Ａｌ合金に特徴を有するものである。The present invention was made based on the above research results, and Fe: 5 to 12%, Si:
Composition containing 5 to 9%, one or more of Cr, Mo, and Nb: 0.2 to 5%, Be: 0.02 to 1%, and the balance Al and unavoidable impurities. , And eutectic Si and Al-Fe- (Cr, Mo, Nb)-
It is characterized by a rapidly solidified Al alloy having a structure in which a Si-based intermetallic compound is dispersed and having excellent high temperature characteristics.
【０００６】つぎに、この発明のＡｌ合金において、成
分組成を上記の通りに限定した理由を説明する。 （ａ） Ｆｅ Ｆｅ成分には、Ａｌ、Ｓｉ、さらにＣｒ、Ｍｏ、および
Ｎｂと共に、Ａｌ−Ｆｅ−（Ｃｒ、Ｍｏ、Ｎｂ）−Ｓｉ
系金属間化合物を形成し、この金属間化合物の形成によ
って高温強度および高温硬さの高温特性が向上するよう
になる作用があるが、その含有量が５％未満では前記金
属間化合物の形成が不十分で、所望の高温特性を確保す
ることができず、一方その含有量が１２％を越えると靭
性が低下するようになることから、その含有量を５〜１
２％と定めた。Next, the reason why the composition of the Al alloy of the present invention is limited as described above will be explained. (A) Fe The Fe component includes Al, Si, and Cr, Mo, and Nb together with Al-Fe- (Cr, Mo, Nb) -Si.
Forming an intermetallic compound, the formation of this intermetallic compound has the effect of improving the high temperature characteristics of high temperature strength and high temperature hardness, but if the content is less than 5%, the formation of said intermetallic compound will occur. If it is insufficient, the desired high temperature characteristics cannot be secured. On the other hand, if the content exceeds 12%, the toughness decreases, so the content is set to 5 to 1.
It was set at 2%.
【０００７】（ｂ） Ｓｉ Ｓｉ成分には、上記の通り金属間化合物を形成して高温
特性を向上させるほか、共晶Ｓｉとして素地に分散分布
して熱膨脹係数を低い状態に保持する作用があるが、そ
の含有量が５％未満では前記作用に所望の効果が得られ
ず、一方その含有量が９％を越えると、粗大な初晶Ｓｉ
が晶出するようになって靭性が低下することから、その
含有量を５〜９％と定めた。(B) Si The Si component forms an intermetallic compound to improve the high temperature characteristics as described above, and also has a function of being dispersed and distributed as eutectic Si in the matrix to keep the coefficient of thermal expansion low. However, if its content is less than 5%, the desired effect cannot be obtained, while if its content exceeds 9%, coarse primary crystal Si is produced.
Is crystallized and the toughness is reduced, so the content was set to 5 to 9%.
【０００８】（ｃ） Ｃｒ、Ｍｏ、およびＮｂ これらの成分には、上記の通り金属間化合物を形成して
高温特性を向上させるほか、前記金属間化合物自体を球
状化して靭性を向上させる作用があるが、その含有量が
０．２％未満では上記の高温特性の向上に寄与する金属
間化合物の形成が不十分であり（この場合、Ａｌ−Ｆｅ
−Ｓｉ系金属間化合物が主体となる）、一方その含有量
が５％を越えると靭性が低下するようになることから、
その含有量を０．２〜５％と定めた。(C) Cr, Mo, and Nb These components have the action of forming an intermetallic compound to improve high-temperature characteristics as described above, and also to spheroidize the intermetallic compound itself to improve toughness. However, if the content is less than 0.2%, the formation of the intermetallic compound that contributes to the improvement of the high temperature characteristics is insufficient (in this case, Al-Fe
-Si based intermetallic compound is the main component), on the other hand, if the content exceeds 5%, the toughness will decrease,
The content was set to 0.2 to 5%.
【０００９】（ｄ） Ｂｅ Ｂｅ成分には、急冷凝固時の非平衡相の生成を抑制する
ほか、上記金属間化合物および共晶Ｓｉを含め組織を微
細化し、もって高温特性を一段と向上させると共に、熱
膨脹係数をより小さなものとする作用があるが、その含
有量が０．０２％未満では前記作用に所望の効果が得ら
れず、一方１％を越えて含有させても前記の作用により
一層の向上効果は現われないことから、その含有量を
０．０２〜１％と定めた。(D) The Be Be component suppresses the formation of a non-equilibrium phase during rapid solidification, and makes the microstructure of the intermetallic compound and eutectic Si finer, thereby further improving the high temperature characteristics. Although it has the effect of making the coefficient of thermal expansion smaller, if the content is less than 0.02%, the desired effect cannot be obtained, while if it exceeds 1%, the effect is further enhanced. Since the improvement effect does not appear, the content was set to 0.02 to 1%.
【００１０】[0010]
【実施例】つぎに、この発明の急冷凝固Ａｌ合金を実施
例により具体的に説明する。通常の溶解炉で、それぞれ
表１，２に示される成分組成をもったＡｌ合金溶湯を調
製し、これをガスアトマイズ法、水冷ロール凝固法、お
よびメルトスピン法のうちのいずれかの方法を用い、１
０3 〜１０5 ℃／sec の範囲内の所定の冷却速度で、そ
れぞれ表１，２に示される通り粉末、フレーク、あるい
はリボンに急冷凝固することにより本発明急冷凝固Ａｌ
合金（以下、本発明Ａｌ合金という）１〜１２および比
較急冷凝固Ａｌ合金（以下、比較Ａｌ合金という）１〜
４をそれぞれ製造した。EXAMPLES Next, the rapidly solidified Al alloy of the present invention will be described in detail with reference to Examples. In an ordinary melting furnace, molten Al alloys having the composition shown in Tables 1 and 2, respectively, were prepared, and the molten aluminum alloys were prepared by any one of the gas atomizing method, water-cooled roll solidification method, and melt spin method.
The rapidly solidified Al of the present invention is obtained by rapidly solidifying powder, flakes, or ribbons as shown in Tables 1 and 2 at a predetermined cooling rate within the range of 0 3 to 10 5 ° C / sec.
Alloys (hereinafter referred to as Al alloys of the present invention) 1 to 12 and comparative rapidly solidified Al alloys (hereinafter referred to as comparative Al alloys) 1 to
4 were each manufactured.
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【表２】 [Table 2]
【００１３】ついで、この結果得られた各種のＡｌ合金
を、いずれも３０〜８０μｍの範囲内の所定の平均粒径
に調製した後、６ton ／cm2 の圧力で１０mm×２０mm×
５５mmの寸法をもった圧粉体にプレス成形し、この圧粉
体に、いずれも５００℃に加熱した状態で、密閉型を用
い、８ton ／cm2 の圧力で熱間鍛造を施すことにより１
４mm×１０mm×６０mmの寸法をもったＡｌ合金焼結鍛造
部品を製造した。これらのＡｌ合金焼結鍛造部品の２０
０℃での高温引張強さと高温硬さ（マイクロビッカース
硬さ）を測定し、この測定結果を表１，２に示した。ま
た、表１，２には熱膨脹係数（３０〜２００℃）の測定
結果も示した。Then, each of the various Al alloys obtained as a result was adjusted to a predetermined average particle size within the range of 30 to 80 μm, and then 10 mm × 20 mm × at a pressure of 6 ton / cm 2.
By press forming into a green compact having a dimension of 55 mm, and then hot forging at a pressure of 8 ton / cm 2 using a closed mold in the state of heating the green compact to 500 ° C.
An Al alloy sintered forged part having dimensions of 4 mm x 10 mm x 60 mm was manufactured. 20 of these Al alloy sintered forged parts
The high temperature tensile strength and high temperature hardness (micro Vickers hardness) at 0 ° C. were measured, and the measurement results are shown in Tables 1 and 2. In addition, Tables 1 and 2 also show the measurement results of the coefficient of thermal expansion (30 to 200 ° C.).
【００１４】[0014]
【発明の効果】表１，２に示される結果から、本発明Ａ
ｌ合金１〜１２は、いずれも微細な共晶ＳｉとＡｌ−Ｆ
ｅ−（Ｃｒ、Ｍｏ、Ｎｂ）−Ｓｉ系金属間化合物が素地
に均一に分散した組織を有し、低い熱膨脹係数を保持し
た状態で、すぐれた高温特性を示すのに対して、比較Ａ
ｌ合金１〜４に見られるように、構成成分のうちのいず
れかの成分含有量がこの発明の範囲から外れて低い場合
や、これを含有しない場合（表２に＊印を付す）には、
高温特性および熱膨脹係数のうちの少なくともいずれか
の特性が劣ったものになることが明らかである。上述の
ように、この発明の急冷凝固Ａｌ合金は、低い熱膨脹係
数を保持すると共に、すぐれた高温特性を有するので、
苛酷な条件下での実用に際しても薄肉化を可能とした状
態で、すぐれた性能を長期に亘って発揮するなど工業上
有用な特性を有するのである。From the results shown in Tables 1 and 2, the present invention A
The alloys 1 to 12 are all fine eutectic Si and Al-F.
While the e- (Cr, Mo, Nb) -Si intermetallic compound has a structure in which it is uniformly dispersed in the matrix and exhibits excellent high temperature characteristics in the state of maintaining a low coefficient of thermal expansion, Comparative A
As seen in Alloys 1 to 4, when the content of any of the constituents is low outside the scope of the present invention, or when it is not contained (marked with * in Table 2). ,
It is clear that at least one of the high temperature properties and the coefficient of thermal expansion becomes poor. As described above, the rapidly solidified Al alloy of the present invention retains a low coefficient of thermal expansion and has excellent high temperature characteristics.
It has industrially useful properties, such as excellent performance over a long period of time, in a state where it can be thinned even in practical use under severe conditions.
フロントページの続き (72)発明者 佐藤 正孝 埼玉県大宮市北袋町１−297 三菱マテリ アル株式会社中央研究所内 (72)発明者 河野 通 埼玉県大宮市北袋町１−297 三菱マテリ アル株式会社中央研究所内(72) Inventor Masataka Sato 1-297 Kitabukuro-cho, Omiya City, Saitama Prefecture Central Research Laboratory of Mitsubishi Materialial Co., Ltd. In the laboratory
Claims (1)
〜５％、 Ｂｅ：０．０２〜１％、 を含有し、残りがＡｌと不可避不純物からなる組成、並
びに素地に共晶ＳｉとＡｌ−Ｆｅ−（Ｃｒ、Ｍｏ、Ｎ
ｂ）−Ｓｉ系金属間化合物が分散した組織を有すること
を特徴とする高温特性のすぐれた急冷凝固Ａｌ合金。1. By weight%, Fe: 5 to 12%, Si: 5 to 9%, one or more of Cr, Mo, and Nb: 0.2
˜5%, Be: 0.02 to 1%, with the balance consisting of Al and unavoidable impurities, as well as eutectic Si and Al—Fe— (Cr, Mo, N
b) A rapidly solidified Al alloy having excellent high temperature characteristics, which has a structure in which a -Si intermetallic compound is dispersed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3456393A JPH06228697A (en) | 1993-01-29 | 1993-01-29 | Rapidly solidified al alloy excellent in high temperature property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3456393A JPH06228697A (en) | 1993-01-29 | 1993-01-29 | Rapidly solidified al alloy excellent in high temperature property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06228697A true JPH06228697A (en) | 1994-08-16 |
Family
ID=12417789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3456393A Pending JPH06228697A (en) | 1993-01-29 | 1993-01-29 | Rapidly solidified al alloy excellent in high temperature property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06228697A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433473A (en) * | 2011-12-15 | 2012-05-02 | 贵州华科铝材料工程技术研究有限公司 | WB-and-NaBH4-doped high-strength aluminum alloy and preparation method thereof |
| CN102433475A (en) * | 2011-12-15 | 2012-05-02 | 贵州华科铝材料工程技术研究有限公司 | High-strength and high-hardness aluminum alloy and preparation method thereof |
| JP2015098871A (en) * | 2013-11-19 | 2015-05-28 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテルハフツングＭＡＨＬＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＧｍｂＨ | Valve for valve device, method of manufacturing the same, and internal combustion engine comprising the same |
| CN111826556A (en) * | 2020-07-15 | 2020-10-27 | 宣城建永精密金属有限公司 | High-voltage electrical system conductor and casting process thereof |
-
1993
- 1993-01-29 JP JP3456393A patent/JPH06228697A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433473A (en) * | 2011-12-15 | 2012-05-02 | 贵州华科铝材料工程技术研究有限公司 | WB-and-NaBH4-doped high-strength aluminum alloy and preparation method thereof |
| CN102433475A (en) * | 2011-12-15 | 2012-05-02 | 贵州华科铝材料工程技术研究有限公司 | High-strength and high-hardness aluminum alloy and preparation method thereof |
| JP2015098871A (en) * | 2013-11-19 | 2015-05-28 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテルハフツングＭＡＨＬＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＧｍｂＨ | Valve for valve device, method of manufacturing the same, and internal combustion engine comprising the same |
| CN111826556A (en) * | 2020-07-15 | 2020-10-27 | 宣城建永精密金属有限公司 | High-voltage electrical system conductor and casting process thereof |
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