JPH05331585A - High strength al alloy - Google Patents
High strength al alloyInfo
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- JPH05331585A JPH05331585A JP16028992A JP16028992A JPH05331585A JP H05331585 A JPH05331585 A JP H05331585A JP 16028992 A JP16028992 A JP 16028992A JP 16028992 A JP16028992 A JP 16028992A JP H05331585 A JPH05331585 A JP H05331585A
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- imc
- crystals
- alloy
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- chain
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は高強度Ａｌ合金、特に、
非晶質相を有する金属組織を備えたＡｌ合金素材を結晶
化して得られたＡｌ合金に関する。This invention relates to high strength Al alloys, especially
The present invention relates to an Al alloy obtained by crystallizing an Al alloy material having a metal structure having an amorphous phase.
【０００２】[0002]
【従来の技術】従来、高強度Ａｌ合金としては、微細な
Ａｌ結晶よりなるマトリックスの結晶粒界に、微細な金
属間化合物結晶（以下、ＩＭＣ結晶と称す）を均一に分
散させたものが知られている（特開平１−２７５７３２
号公報参照）。この場合、各ＩＭＣ結晶はその殆どが独
立して存在しており、その形状は丸みを帯びたものであ
る。2. Description of the Related Art Conventionally, as a high-strength Al alloy, there has been known one in which fine intermetallic compound crystals (hereinafter referred to as IMC crystals) are uniformly dispersed in the crystal grain boundaries of a matrix made of fine Al crystals. (Japanese Patent Laid-Open No. 1-275732)
(See the official gazette). In this case, most of the IMC crystals exist independently of each other, and the shape thereof is rounded.
【０００３】[0003]
【発明が解決しようとする課題】従来例Ａｌ合金の変形
は、Ａｌ結晶の微細化に伴いマトリックスにおける結晶
粒界のすべりによって発生する。したがってＡｌ合金の
強度はマトリックスおよびＩＭＣ結晶間における結晶粒
界のすべり抵抗に依存することになるが、従来例Ａｌ合
金においては、そのＩＭＣ結晶が、前記のように独立し
て存在し、しかも丸みを帯びた形状を有することからマ
トリックスとの間の結晶粒界のすべり抵抗が比較的低
く、その結果、Ａｌ合金の高強度化を十分に達成するこ
とができない、という問題があった。The deformation of the Al alloy of the prior art occurs due to the slip of the crystal grain boundaries in the matrix as the Al crystals are refined. Therefore, the strength of the Al alloy depends on the slip resistance of the crystal grain boundary between the matrix and the IMC crystal. However, in the conventional Al alloy, the IMC crystal exists independently as described above, and the roundness is rounded. Since it has a rounded shape, the slip resistance of the crystal grain boundary between the matrix and the matrix is relatively low, and as a result, there is a problem that it is not possible to sufficiently achieve high strength of the Al alloy.
【０００４】本発明は前記に鑑み、マトリックスの結晶
粒界に連鎖状ＩＭＣ結晶を分散させることによって、そ
れとマトリックスとの間の結晶粒界のすべり抵抗を高
め、これにより高強度化を達成されたＡｌ合金を提供す
ることを目的とする。In view of the above, the present invention achieves high strength by dispersing the chain-shaped IMC crystal in the crystal grain boundary of the matrix to increase the slip resistance of the crystal grain boundary between the matrix and the matrix. The purpose is to provide an Al alloy.
【０００５】[0005]
【課題を解決するための手段】本発明は、非晶質相を有
する金属組織を備えたＡｌ合金素材を結晶化して得られ
たＡｌ合金であって、Ａｌ結晶よりなるマトリックス
と、そのマトリックスの結晶粒界に分散する粒径ｄがｄ
≦１．２μｍであるＩＭＣ結晶とを有し、それらＩＭＣ
結晶のうち、少なくとも一部のものは、３個以上のＩＭ
Ｃ結晶が線状に結合した複数の連鎖状ＩＭＣ結晶を構成
し、ＩＭＣ結晶の体積分率Ｖｆ1 に対する連鎖状ＩＭＣ
結晶の体積分率Ｖｆ2 の比率ＡをＡ≧３０％に設定した
ことを特徴とする。The present invention is an Al alloy obtained by crystallizing an Al alloy material having a metallographic structure having an amorphous phase, the matrix comprising Al crystals, and the matrix of the matrix. The grain size d dispersed in the grain boundaries is d
And IMC crystals with ≦ 1.2 μm
At least some of the crystals are three or more IM
A plurality of chain-shaped IMC crystals in which C crystals are linearly bonded to each other are formed, and the chain-shaped IMC with respect to the volume fraction Vf 1 of the IMC crystals.
It is characterized in that the ratio A of the crystal volume fraction Vf 2 is set to A ≧ 30%.
【０００６】[0006]
【作用】非晶質相を有する金属組織とは、組成の制御、
冷却速度の抑制、急冷後の熱履歴等により非晶質相中に
粒径３０ｎｍ以下の微細Ａｌ結晶を均一に分散させた、
非晶質相と結晶質相とよりなる混相組織および非晶質単
相組織の一方を意味する。[Function] The metal structure having an amorphous phase is to control the composition,
Fine Al crystals having a grain size of 30 nm or less were uniformly dispersed in the amorphous phase by suppressing the cooling rate, heat history after rapid cooling, and the like.
It means one of a mixed phase structure composed of an amorphous phase and a crystalline phase and an amorphous single phase structure.
【０００７】混相組織および非晶質単相組織の非晶質相
を結晶化すると、微細なＡｌ結晶およびＩＭＣ結晶が析
出する。粒径ｄ≦１．２μｍのＩＭＣ結晶よりなる連鎖
状ＩＭＣ結晶は非球形であって、マトリックスとの間に
凹凸係合部を形成するので、連鎖状ＩＭＣ結晶およびマ
トリックス間における結晶粒界のすべり抵抗が高められ
る。このような連鎖状ＩＭＣ結晶を前記比率Ａにて存在
させることによりＡｌ合金の高強度化が達成される。When the mixed phase structure and the amorphous phase of the amorphous single phase structure are crystallized, fine Al crystals and IMC crystals are precipitated. The chain-shaped IMC crystal composed of IMC crystals with a grain size d ≦ 1.2 μm is non-spherical and forms a concavo-convex engagement portion with the matrix. Therefore, the slip of the crystal grain boundary between the chain-shaped IMC crystal and the matrix Resistance is increased. By making such a chain-shaped IMC crystal exist in the above ratio A, the Al alloy can have a high strength.
【０００８】その上、ＩＭＣ結晶の粒径ｄを前記のよう
に特定することによって、連鎖状ＩＭＣ結晶を構成する
ＩＭＣ結晶相互間の結晶粒界のすべり抵抗が、連鎖状Ｉ
ＭＣ結晶およびマトリックス間のすべり抵抗よりも高く
なるので、マトリックスおよび連鎖状ＩＭＣ結晶間にす
べりを生じる前に、連鎖状ＩＭＣ結晶自体にすべりが生
じるようなことはない。Moreover, by specifying the grain size d of the IMC crystals as described above, the slip resistance of the grain boundaries between the IMC crystals forming the chain-shaped IMC crystal is determined by the chain-shaped I
Since it is higher than the slip resistance between the MC crystal and the matrix, the chain IMC crystal itself does not slip before the slip occurs between the matrix and the chain IMC crystal.
【０００９】ただし、連鎖状ＩＭＣ結晶を構成するＩＭ
Ｃ結晶の粒径ｄがｄ＞１．２μｍになると、連鎖状ＩＭ
Ｃ結晶自体の大型化に伴いそれを構成するＩＭＣ結晶相
互間の結晶粒界にすべりを生じ易くなるため、Ａｌ合金
の高強度化を達成することができない。また連鎖状ＩＭ
Ｃ結晶の比率ＡがＡ＜３０％になると、その連鎖状ＩＭ
Ｃ結晶の存在量が少なくなるため、同様にＡｌ合金の高
強度化を達成することができない。However, the IM that constitutes the chain-shaped IMC crystal
When the grain size d of C crystal is d> 1.2 μm, chained IM
As the C crystal itself becomes larger, slippage is likely to occur at the crystal grain boundaries between the IMC crystals that compose the C crystal, so that it is not possible to achieve high strength of the Al alloy. Also chained IM
When the ratio A of C crystals becomes A <30%, the chained IM
Since the amount of C crystals is small, it is not possible to achieve the high strength of the Al alloy as well.
【００１０】[0010]
【実施例】本発明に係るＡｌ合金の製造に当っては、非
晶質相および結晶質相よりなる混相組織を有する金属組
織を備えた粉末状Ａｌ合金素材または非晶質単相組織を
有する金属組織を備えた粉末状Ａｌ合金素材を製造する
工程、Ａｌ合金素材を用いてビレットを製造する工程、
ビレットに熱処理を施す工程、およびビレットを用いて
熱間押出し加工を行う工程が用いられる。EXAMPLES In producing an Al alloy according to the present invention, a powdery Al alloy material having a metal structure having a mixed phase structure composed of an amorphous phase and a crystalline phase or an amorphous single phase structure is used. A step of producing a powdered Al alloy material having a metallographic structure, a step of producing a billet using the Al alloy material,
A step of heat-treating the billet and a step of hot extrusion using the billet are used.
【００１１】熱処理工程は２段階で行われる。１次熱処
理の温度は非晶質相の結晶化温度Ｔｘ以下に設定され、
これにより微細なＡｌ結晶および粒径ｄがｄ≦１．２μ
ｍであるＩＭＣ結晶が徐々に析出し、その際、時間を変
化させることによって非晶質相の結晶化度が調整され
る。２次熱処理は結晶化温度Ｔｘよりも高い温度で行わ
れ、これにより非晶質相は完全に結晶化し、微細Ａｌ結
晶よりなるマトリックスの結晶粒界に、粒径ｄ≦１．２
μｍのＩＭＣ結晶が優先的に分散状態で配置され、それ
らＩＭＣ結晶のうち、少なくとも一部のものは、３個以
上のＩＭＣ結晶が線状に結合した複数の連鎖状ＩＭＣ結
晶を構成する。The heat treatment process is performed in two stages. The temperature of the primary heat treatment is set to be equal to or lower than the crystallization temperature Tx of the amorphous phase,
As a result, fine Al crystals and grain size d are d ≦ 1.2 μ
The IMC crystals of m gradually precipitate, and the crystallinity of the amorphous phase is adjusted by changing the time. The secondary heat treatment is performed at a temperature higher than the crystallization temperature Tx, whereby the amorphous phase is completely crystallized, and the grain size d ≦ 1.2 at the grain boundaries of the matrix made of fine Al crystals.
μm IMC crystals are preferentially arranged in a dispersed state, and at least some of the IMC crystals form a plurality of chain-shaped IMC crystals in which three or more IMC crystals are linearly bonded.
【００１２】この場合、粒径ｄ≦１．２μｍのＩＭＣ結
晶の体積分率Ｖｆ1 は５％≦Ｖｆ1≦４０％に設定さ
れ、またその体積分率Ｖｆ1 に対する連鎖状ＩＭＣ結晶
の体積分率Ｖｆ2 の比率、即ち連鎖状ＩＭＣ結晶の比率
Ａ＝（Ｖｆ2 ／Ｖｆ1 ）×１００（％）はＡ≧３０％に
設定される。粒径ｄ≦１．２μｍのＩＭＣ結晶の体積分
率Ｖｆ1 がＶｆ1 ＜５％では、それらＩＭＣ結晶が連鎖
状ＩＭＣ結晶を構成していてもＡｌ合金の高強度化を図
ることができない。一方、体積分率Ｖｆ1 がＶｆ1 ＞４
０％では、ＩＭＣ結晶相互が凝集して塊状体となるた
め、前記比率ＡをＡ≧３０％にすることができなくな
る。また比率ＡがＡ＜３０％ではＡｌ合金の高強度化を
達成することができない。In this case, the volume fraction Vf 1 of the IMC crystal having the grain size d ≦ 1.2 μm is set to 5% ≦ Vf 1 ≦ 40%, and the volume fraction of the chain-shaped IMC crystal with respect to the volume fraction Vf 1 is set. The ratio of the ratio Vf 2 , that is, the ratio A = (Vf 2 / Vf 1 ) × 100 (%) of the chained IMC crystal is set to A ≧ 30%. When the volume fraction Vf 1 of the IMC crystals with the grain size d ≦ 1.2 μm is Vf 1 <5%, it is not possible to increase the strength of the Al alloy even if the IMC crystals form a chain IMC crystal. On the other hand, the volume fraction Vf 1 is Vf 1 > 4
At 0%, the IMC crystals aggregate to form a lump, so that the ratio A cannot be A ≧ 30%. Further, when the ratio A is A <30%, it is not possible to achieve high strength of the Al alloy.
【００１３】なお、１次熱処理の温度を結晶化温度Ｔｘ
を超える温度に設定すると、急激にＡｌ結晶およびＩＭ
Ｃ結晶が析出するため、ＩＭＣ結晶の配列が乱れて連鎖
状ＩＭＣ結晶の比率ＡがＡ＜３０％となる。The temperature of the primary heat treatment is set to the crystallization temperature Tx.
If the temperature is set higher than, suddenly the Al crystal and IM
Since the C crystals are precipitated, the arrangement of the IMC crystals is disturbed, and the ratio A of the chain-shaped IMC crystals becomes A <30%.
【００１４】〔実施例１〕Ａｌ89Ｆｅ8 Ｙ3 （数値は原
子％）の組成を有する溶湯を調製し、次いで超音波ガス
アトマイズ装置を用いて、Ｈｅガス圧１００kgｆ／cm2
の条件下で粉末状Ａｌ合金素材を製造した。その後、粉
末状Ａｌ合金素材に分級処理を施して、その粒径を２２
μｍ以下に調整した。Example 1 A molten metal having a composition of Al 89 Fe 8 Y 3 (numerical value is atomic%) was prepared, and then He gas pressure was 100 kgf / cm 2 using an ultrasonic gas atomizer.
A powdery Al alloy material was manufactured under the conditions of. After that, the powdered Al alloy material is subjected to classification treatment so that the particle size is 22
It was adjusted to be not more than μm.
【００１５】Ａｌ合金素材について、Ｘ線回折および示
差熱量分析（ＤＳＣ）を行い、その金属組織を調べたと
ころ、それは結晶質相と非晶質相とよりなる混相組織を
有し、また非晶質相の結晶化温度Ｔｘは６５３Ｋである
ことが判明した。The Al alloy material was subjected to X-ray diffraction and differential calorimetry (DSC), and its metal structure was examined. It had a mixed phase structure composed of a crystalline phase and an amorphous phase, and was amorphous. The crystallization temperature Tx of the substance phase was found to be 653K.
【００１６】次いで、Ａｌ合金素材を用い、次のような
各工程を経て各種Ａｌ合金を製造した。即ち、Ａｌ合金
素材に４０００kgｆ／cm2 の条件下で冷間静水圧プレス
（ＣＩＰ）を施して複数のビレットを製造する工程、各
ビレットに熱処理を施す工程、各ビレットに押出し温度
６７３Ｋの条件下で熱間押出し加工を施す工程である。
熱処理において、１次熱処理は温度６２３Ｋ、時間１５
〜７５分間の条件下で行われ、２次熱処理は７２３Ｋ、
１時間の条件下で行われた。Next, using an Al alloy material, various Al alloys were manufactured through the following steps. That is, a step of producing a plurality of billets by subjecting an Al alloy material to cold isostatic pressing (CIP) under the conditions of 4000 kgf / cm 2 , a step of subjecting each billet to a heat treatment, and an extrusion temperature of 673 K for each billet. This is a step of performing hot extrusion.
In the heat treatment, the first heat treatment is performed at a temperature of 623 K for 15 hours.
~ 75 minutes, the second heat treatment is 723K,
It was carried out under the condition of 1 hour.
【００１７】表１は、各種Ａｌ合金（１）〜（５）にお
ける１次熱処理の時間、粒径ｄがｄ≦１．２μｍである
ＩＭＣ結晶の体積分率Ｖｆ1 、連鎖状ＩＭＣ結晶の体積
分率Ｖｆ2 、連鎖状ＩＭＣ結晶の比率Ａおよび引張り試
験結果を示す。なお、各Ａｌ合金（１）〜（５）におい
て、略全部のＩＭＣ結晶の粒径ｄがｄ≦０．９μｍであ
った。Table 1 shows the time of the primary heat treatment in each of the Al alloys (1) to (5), the volume fraction Vf 1 of the IMC crystal having a grain size d of d ≦ 1.2 μm, and the volume of the chain-shaped IMC crystal. The fraction Vf 2 , the ratio A of the chained IMC crystals and the tensile test result are shown. In each of the Al alloys (1) to (5), the grain size d of almost all the IMC crystals was d ≦ 0.9 μm.
【００１８】[0018]
【表１】 図１は連鎖状ＩＭＣ結晶の比率Ａと応力との関係を示
し、図中、線ａ1 が引張強さに、また線ａ2 が０．２％
耐力にそれぞれ該当する。さらに符号（１）〜（５）は
Ａｌ合金（１）〜（５）にそれぞれ該当する。[Table 1] FIG. 1 shows the relationship between the ratio A of chained IMC crystals and the stress. In the figure, line a 1 is the tensile strength and line a 2 is 0.2%.
Each corresponds to the proof stress. Further, reference numerals (1) to (5) correspond to Al alloys (1) to (5), respectively.
【００１９】表１および図１から明らかなように、ｄ≦
１．２μｍＩＭＣ結晶の体積分率Ｖｆ1 が５％≦Ｖｆ1
≦４０％であり、且つ連鎖状ＩＭＣ結晶の比率ＡがＡ≧
３０％であるＡｌ合金（３）〜（５）は、連鎖状ＩＭＣ
結晶による高すべり抵抗に起因して高強度である。As is clear from Table 1 and FIG. 1, d≤
Volume fraction Vf 1 of 1.2 μm IMC crystal is 5% ≦ Vf 1
≦ 40%, and the ratio A of the chained IMC crystals is A ≧
Al alloys (3) to (5), which are 30%, are chain IMCs.
High strength due to high slip resistance due to crystals.
【００２０】図２（ａ）はＡｌ合金（３）の金属組織を
示す電子顕微鏡写真（２０，０００倍）であり、同図
（ｂ）は同図（ａ）の写図である。図２（ａ）は、Ａｌ
合金（３）のテストピースを鏡面研磨し、その研磨面に
エッチング処理を施した後撮影されたものである。エッ
チング液としては、２００mlのＨ2 Ｏ、２０mlのＨＣ
ｌ、２０mlのＨＮＯ3 および５mlのＨＦからなる混酸溶
液が用いられ、処理時間は５分間に設定された。FIG. 2 (a) is an electron micrograph (20,000 times) showing the metal structure of the Al alloy (3), and FIG. 2 (b) is a copy of the same figure (a). FIG. 2A shows Al
The test piece of alloy (3) was mirror-polished, and the polished surface was subjected to etching treatment and then photographed. As the etching solution, 200 ml of H 2 O, 20 ml of HC
A mixed acid solution consisting of 1, 20 ml HNO 3 and 5 ml HF was used and the treatment time was set to 5 minutes.
【００２１】図２（ａ），（ｂ）において、Ａｌ結晶よ
りなるマトリックスＭの結晶粒界に多数のＩＭＣ結晶ｃ
（図には一部にのみ符号を付す）が分散しており、４個
の連鎖状ＩＭＣ結晶Ｃ1 〜Ｃ4 が観察される。これら連
鎖状ＩＭＣ結晶Ｃ1 〜Ｃ4 は３個以上のＩＭＣ結晶ｃが
線状に結合したものである。In FIGS. 2A and 2B, a large number of IMC crystals c are present at the grain boundaries of the matrix M made of Al crystals.
(Only part of the figure is labeled) are dispersed, and four chain-shaped IMC crystals C 1 to C 4 are observed. These chain-shaped IMC crystals C 1 to C 4 are three or more IMC crystals c linearly bonded.
【００２２】比較のためＡｌ90Ｎｉ7 Ｙ3 （数値は原子
％）の組成を有する溶湯を調製し、次いで実施例１と同
様の方法で粉末状Ａｌ合金素材を製造し、その後Ａｌ合
金素材に実施例１と同様の分級処理を施した。またＡｌ
合金素材について、実施例１と同様の方法で金属組織を
調べたところ、そのＡｌ合金素材は実施例１と同様に混
相組織を有し、また非晶質相の結晶化温度Ｔｘは６２５
Ｋであることが判明した。For comparison, a molten metal having a composition of Al 90 Ni 7 Y 3 (numerical value is atomic%) was prepared, and then a powdered Al alloy raw material was manufactured by the same method as in Example 1, and thereafter, an Al alloy raw material was prepared. The same classification treatment as in Example 1 was performed. Also Al
When the metal structure of the alloy material was examined by the same method as in Example 1, the Al alloy material had a mixed phase structure as in Example 1, and the crystallization temperature Tx of the amorphous phase was 625.
It turned out to be K.
【００２３】次いでＡｌ合金素材を用い、実施例１と同
様の方法で各種Ａｌ合金（６）〜（１０）を製造した。
ただし、１次熱処理の温度は５９３Ｋに、また２次熱処
理の温度は８２３Ｋにそれぞれ設定された。各Ａｌ合金
（６）〜（１０）において、略全部のＩＭＣ結晶の粒径
ｄはｄ＞１．２μｍであった。Then, various Al alloys (6) to (10) were manufactured by the same method as in Example 1 using the Al alloy material.
However, the temperature of the primary heat treatment was set to 593K, and the temperature of the secondary heat treatment was set to 823K. In each of the Al alloys (6) to (10), the grain size d of almost all the IMC crystals was d> 1.2 μm.
【００２４】表２は、各種Ａｌ合金（６）〜（１０）に
おける１次熱処理の時間、粒径ｄがｄ＞１．２μｍであ
るＩＭＣ結晶の体積分率Ｖｆ1 、連鎖状ＩＭＣ結晶の体
積分率Ｖｆ2 、連鎖状ＩＭＣ結晶の比率Ａおよび引張り
試験結果を示す。Table 2 shows the time of the primary heat treatment in various Al alloys (6) to (10), the volume fraction Vf 1 of the IMC crystal having the grain size d of d> 1.2 μm, and the volume of the chain-shaped IMC crystal. The fraction Vf 2 , the ratio A of the chained IMC crystals and the tensile test result are shown.
【００２５】[0025]
【表２】 表２から明らかなように、ＩＭＣ結晶の粒径ｄがｄ＞
１．２μｍになると、その体積分率Ｖｆ1 が５％≦Ｖｆ
1 ≦４０％であり、また連鎖状ＩＭＣ結晶の比率ＡがＡ
≧３０％であっても、Ａｌ合金（６）〜（１０）は低強
度となる。[Table 2] As is clear from Table 2, the grain size d of the IMC crystal is d>
At 1.2 μm, the volume fraction Vf 1 is 5% ≦ Vf
1 ≤ 40%, and the ratio A of the chained IMC crystals is A
Even if ≧ 30%, the Al alloys (6) to (10) have low strength.
【００２６】また比較のため前記Ａｌ合金素材（Ａｌ90
Ｎｉ7 Ｙ3 ）を用い、実施例１と同様の方法で各種Ａｌ
合金（１１）〜（２０）を製造した。ただし、１次熱処
理の時間は３０分間または６０分間に設定され、２次熱
処理の温度は７４３〜８２３Ｋに設定された。For comparison, the Al alloy material (Al 90
Ni 7 Y 3 ) and various Al in the same manner as in Example 1.
Alloys (11)-(20) were produced. However, the time of the primary heat treatment was set to 30 minutes or 60 minutes, and the temperature of the secondary heat treatment was set to 743-823K.
【００２７】表３は、各種Ａｌ合金（１１）〜（２０）
における１次熱処理の時間、２次熱処理の温度、粒径ｄ
がｄ≦１．２μｍであるＩＭＣ結晶の体積分率Ｖｆ1 、
連鎖状ＩＭＣ結晶の比率Ａおよび引張り試験結果を示
す。なお、各Ａｌ合金（１１）〜（２０）において、全
ＩＭＣ結晶の体積分率Ｖｆ3 はＶｆ3 ≒２８％であっ
た。Table 3 shows various Al alloys (11) to (20).
Time of primary heat treatment, temperature of secondary heat treatment, grain size d
Where d ≦ 1.2 μm, the volume fraction Vf 1 of the IMC crystal,
The ratio A of chain-like IMC crystals and the tensile test results are shown. In each of the Al alloys (11) to (20), the volume fraction Vf 3 of all IMC crystals was Vf 3 ≈28%.
【００２８】[0028]
【表３】 図３は各Ａｌ合金（１１）〜（２０）におけるｄ≦１．
２ＩＭＣ結晶の体積分率Ｖｆ1 と応力との関係を示し、
図中、線ｂ1 が各Ａｌ合金（１１）〜（１５）の引張強
さに、一方、線ｂ2 が各Ａｌ合金（１１）〜（１５）の
０．２％耐力にそれぞれ該当する。また線ｃ1 が各Ａｌ
合金（１６）〜（２０）の引張強さに、一方、線ｃ2 が
各Ａｌ合金（１６）〜（２０）の０．２％耐力にそれぞ
れ該当する。図中の符号（１１）〜（２０）はＡｌ合金
（１１）〜（２０）にそれぞれ該当する。[Table 3] FIG. 3 shows that d ≦ 1.
2 shows the relationship between the volume fraction Vf 1 of 2 IMC crystals and stress,
In the figure, the line b 1 corresponds to the tensile strength of each Al alloy (11) to (15), while the line b 2 corresponds to the 0.2% proof stress of each Al alloy (11) to (15). Also, the line c 1 is each Al
The tensile strengths of the alloys (16) to (20) correspond to the tensile strength of the alloys (16) to (20), and the line c 2 corresponds to the 0.2% proof stress of the Al alloys (16) to (20). Reference numerals (11) to (20) in the figure correspond to Al alloys (11) to (20), respectively.
【００２９】表３および図３から明らかなように、ｄ≦
１．２ＩＭＣ結晶の体積分率Ｖｆ1がＶｆ1 ≧５％であ
り、且つ連鎖状ＩＭＣ結晶の比率ＡがＡ≧３０％である
Ａｌ合金（１６）〜（１８）は高強度である。前記体積
分率Ｖｆ1 がＶｆ1 ＜５％であるＡｌ合金（１４），
（１５），（１９），（２０）は低強度である。また前
記体積分率Ｖｆ1 がＶｆ1 ≧５％であっても前記比率Ａ
がＡ＜３０％であるＡｌ合金（１１）〜（１３）もまた
同様である。As is apparent from Table 3 and FIG. 3, d≤
1.2 Al alloys (16) to (18) in which the volume fraction Vf 1 of the IMC crystal is Vf 1 ≧ 5% and the proportion A of the chain IMC crystal is A ≧ 30% have high strength. An Al alloy (14) having a volume fraction Vf 1 of Vf 1 <5%,
(15), (19) and (20) have low strength. Even if the volume fraction Vf 1 is Vf 1 ≧ 5%, the ratio A
The same applies to Al alloys (11) to (13) in which A <30%.
【００３０】さらに比較のため、各種組成を有する溶湯
を調製し、次いで実施例１と同様の方法で各種粉末状Ａ
ｌ合金素材を製造し、その後それらＡｌ合金素材に実施
例１と同様の分級処理を施した。また各Ａｌ合金素材に
ついて、実施例１と同様の方法で金属組織を調べた。Further, for comparison, melts having various compositions were prepared, and then various powders A were prepared in the same manner as in Example 1.
l alloy materials were manufactured, and then the Al alloy materials were subjected to the same classification treatment as in Example 1. The metal structure of each Al alloy material was examined by the same method as in Example 1.
【００３１】表４は、各Ａｌ合金素材（２１）〜（３
８）の組成、金属組織および非晶質相の結晶化温度Ｔｘ
を示す。Table 4 shows each of the Al alloy materials (21) to (3).
8) Composition, metallic structure and crystallization temperature Tx of amorphous phase
Indicates.
【００３２】[0032]
【表４】 次いで各Ａｌ合金素材（２１）〜（３８）を用い、実施
例１と同様の方法で各種Ａｌ合金（２１）〜（３８）
〔Ａｌ合金（２１）〜（３８）はＡｌ合金素材（２１）
〜（３８）にそれぞれ対応する〕を製造した。ただし、
１次熱処理の温度は５９３Ｋに、また時間は３０分間ま
たは９０分間に、さらに２次熱処理の温度は６５３〜６
９３Ｋにそれぞれ設定された。[Table 4] Next, using each of the Al alloy materials (21) to (38), in the same manner as in Example 1, various Al alloys (21) to (38).
[Al alloys (21) to (38) are Al alloy materials (21)
To (38) respectively. However,
The temperature of the primary heat treatment is 593K, the time is 30 minutes or 90 minutes, and the temperature of the secondary heat treatment is 653-6.
Each was set to 93K.
【００３３】表５および表６は、各種Ａｌ合金（２１）
〜（３８）における１次熱処理の時間、２次熱処理の温
度、全ＩＭＣ結晶の体積分率Ｖｆ3 、粒径ｄがｄ≦１．
２μｍであるＩＭＣ結晶の体積分率Ｖｆ1 、連鎖状ＩＭ
Ｃ結晶の比率Ａおよび引張り試験結果を示す。Tables 5 and 6 show various Al alloys (21).
To (38), the time of the primary heat treatment, the temperature of the secondary heat treatment, the volume fraction Vf 3 of all IMC crystals, and the grain size d of d ≦ 1.
Volume fraction Vf 1 of IMC crystal of 2 μm, chained IM
The ratio A of C crystal and the tensile test result are shown.
【００３４】[0034]
【表５】 [Table 5]
【００３５】[0035]
【表６】 図４は各Ａｌ合金（２１）〜（３８）におけるｄ≦１．
２ＩＭＣ結晶の体積分率Ｖｆ1 と引張強さとの関係を示
し、また図５は各Ａｌ合金（２１）〜（３８）における
ｄ≦１．２ＩＭＣ結晶の体積分率Ｖｆ1 と０．２％耐力
との関係を示す。各線と各Ａｌ合金との関係は表７の通
りであり、図４，図５における各符号（２１）〜（３
８）は各Ａｌ合金（２１）〜（３８）にそれぞれ該当す
る。[Table 6] FIG. 4 shows d.ltoreq.1 for each of the Al alloys (21) to (38).
2 shows the relationship between the volume fraction Vf 1 of 2IMC crystal and the tensile strength, and FIG. 5 shows the volume fraction Vf 1 of d ≦ 1.2 IMC crystal and 0.2% proof stress of each Al alloy (21) to (38). Shows the relationship with. The relationship between each line and each Al alloy is as shown in Table 7, and each reference numeral (21) to (3) in FIGS.
8) corresponds to each of the Al alloys (21) to (38).
【００３６】[0036]
【表７】 表５，表６、図４および図５から明らかなように、同一
組成のＡｌ合金（２１）〜（２３）および（３０）〜
（３２）、Ａｌ合金（２４）〜（２６）および（３３）
〜（３５）ならびにＡｌ合金（２７）〜（２９）および
（３６）〜（３８）において、ｄ≦１．２ＩＭＣ結晶の
Ｖｆ1 がＶｆ1 ≦４０％であり、また連鎖状ＩＭＣ結晶
の比率ＡがＡ≧３０％であるＡｌ合金（３２），（３
５），（３７），（３８）は他のＡｌ合金に比べて高強
度であることが判る。[Table 7] As is clear from Table 5, Table 6, FIG. 4 and FIG. 5, Al alloys (21) to (23) and (30) to have the same composition.
(32), Al alloys (24) to (26) and (33)
-(35) and Al alloys (27) to (29) and (36) to (38), Vf 1 of d ≦ 1.2 IMC crystal is Vf 1 ≦ 40%, and the ratio A of chain-shaped IMC crystal is Alloys (32), (3) in which A ≧ 30%
It can be seen that 5), (37) and (38) have higher strength than other Al alloys.
【００３７】〔実施例２〕各種組成を有する溶湯を調製
し、次いで実施例１と同様の方法で各種粉末状Ａｌ合金
素材を製造し、その後それらＡｌ合金素材に実施例１と
同様の分級処理を施した。また各Ａｌ合金素材につい
て、実施例１と同様の方法で金属組織を調べた。Example 2 A molten metal having various compositions was prepared, various powdery Al alloy materials were manufactured by the same method as in Example 1, and then the Al alloy materials were classified as in Example 1. Was applied. The metal structure of each Al alloy material was examined by the same method as in Example 1.
【００３８】表８は、各Ａｌ合金素材（３９）〜（５
８）の組成、金属組織および非晶質相の結晶化温度Ｔｘ
を示す。Ｍｍはミッシュメタルである。Ａｌ合金素材
（４７）〜（５０）には、ＩＭＣ結晶（Ａｌ3 Ｚｒ）が
含まれており、その体積分率は１０％以下であった。Table 8 shows each Al alloy material (39) to (5).
8) Composition, metallic structure and crystallization temperature Tx of amorphous phase
Indicates. Mm is misch metal. The Al alloy materials (47) to (50) contained IMC crystals (Al 3 Zr), and the volume fraction thereof was 10% or less.
【００３９】[0039]
【表８】 次いで各Ａｌ合金素材（３９）〜（５８）を用い、実施
例１と同様の方法で各種Ａｌ合金（３９）〜（５８）
〔Ａｌ合金（３９）〜（５８）はＡｌ合金素材（３９）
〜（５８）にそれぞれ対応する〕を製造した。ただし、
１次熱処理の温度は５９３〜６５３Ｋに、また時間は３
０〜７５分間にそれぞれ設定され、２次熱処理の温度は
７７３Ｋに設定された。[Table 8] Next, using each Al alloy material (39) to (58), in the same manner as in Example 1, various Al alloys (39) to (58).
[Al alloys (39) to (58) are Al alloy materials (39)
To (58) respectively] were produced. However,
The temperature of the first heat treatment is 593 to 653K, and the time is 3
The temperature was set to 0 to 75 minutes, and the temperature of the secondary heat treatment was set to 773K.
【００４０】表９および表１０は、各種Ａｌ合金（３
９）〜（５８）における１次熱処理の温度および時間、
粒径ｄがｄ≦１．２μｍであるＩＭＣ結晶の体積分率Ｖ
ｆ1 、連鎖状ＩＭＣ結晶の体積分率Ｖｆ2 、連鎖状ＩＭ
Ｃ結晶の比率Ａおよび引張り試験結果を示す。なお、各
Ａｌ合金（３９）〜（５８）において、略全部のＩＭＣ
結晶の粒径ｄがｄ≦１．２μｍであった。Tables 9 and 10 show various Al alloys (3
9) to (58) the temperature and time of the primary heat treatment,
Volume fraction V of IMC crystal with grain size d ≦ 1.2 μm
f 1 , volume fraction of chained IMC crystal Vf 2 , chained IM
The ratio A of C crystal and the tensile test result are shown. In each Al alloy (39) to (58), almost all IMC
The crystal grain size d was d ≦ 1.2 μm.
【００４１】[0041]
【表９】 [Table 9]
【００４２】[0042]
【表１０】 表９および表１０から明らかなように、Ａｌ合金（４
０）〜（４２），（４５），（４６），（５０），（５
３），（５４），（５７），（５８）は、ｄ≦１．２μ
ｍＩＭＣ結晶の体積分率Ｖｆ1 が５％≦Ｖｆ1 ≦４０％
であり、且つ連鎖状ＩＭＣ結晶の比率ＡがＡ≧３０％で
あって高強度である。[Table 10] As is clear from Table 9 and Table 10, Al alloy (4
0) to (42), (45), (46), (50), (5
3), (54), (57), and (58) are d ≦ 1.2 μ
The volume fraction Vf 1 of the mIMC crystal is 5% ≦ Vf 1 ≦ 40%
And the ratio A of the chain-shaped IMC crystals is A ≧ 30%, which is high strength.
【００４３】[0043]
【発明の効果】本発明によれば、前記のようにＡｌ結晶
マトリックスの結晶粒界に特定量の連鎖状ＩＭＣ結晶を
分散させることにより、マトリックスおよび連鎖状ＩＭ
Ｃ結晶間の結晶粒界のすべり抵抗を高めて、高強度化を
達成されたＡｌ合金を提供することができる。According to the present invention, as described above, a certain amount of chain-shaped IMC crystals are dispersed in the grain boundaries of the Al crystal matrix, whereby the matrix and the chain-shaped IM are dispersed.
It is possible to provide an Al alloy that achieves high strength by increasing the slip resistance of the crystal grain boundary between C crystals.
【図１】連鎖状ＩＭＣ結晶の比率Ａと応力との関係を示
すグラフである。FIG. 1 is a graph showing the relationship between the ratio A of chained IMC crystals and stress.
【図２】（ａ）はＡｌ合金の金属組織を示す顕微鏡写真
であり、（ｂ）は（ａ）の写図である。FIG. 2 (a) is a micrograph showing the metal structure of an Al alloy, and FIG. 2 (b) is a drawing of (a).
【図３】ｄ≦１．２ＩＭＣ結晶の体積分率Ｖｆ1 と応力
との関係を示すグラフである。FIG. 3 is a graph showing the relationship between the volume fraction Vf 1 of d ≦ 1.2 IMC crystal and stress.
【図４】ｄ≦１．２ＩＭＣ結晶の体積分率Ｖｆ1 と引張
強さとの関係を示すグラフである。FIG. 4 is a graph showing the relationship between the volume fraction Vf 1 of d ≦ 1.2 IMC crystal and the tensile strength.
【図５】ｄ≦１．２ＩＭＣ結晶の体積分率Ｖｆ1 と０．
２％耐力との関係を示すグラフである。FIG. 5: d ≦ 1.2 IMC crystal volume fractions Vf 1 and 0.
It is a graph which shows the relationship with 2% yield strength.
ｃ ＩＭＣ結晶 Ｃ1 〜Ｃ4 連鎖状ＩＭＣ結晶 Ｍ マトリックスc IMC crystal C 1 -C 4 chained IMC crystals M matrix
Claims (2)
合金素材を結晶化して得られたＡｌ合金であって、Ａｌ
結晶よりなるマトリックスと、そのマトリックスの結晶
粒界に分散する粒径ｄがｄ≦１．２μｍである金属間化
合物結晶（以下、ＩＭＣ結晶）とを有し、それらＩＭＣ
結晶のうち、少なくとも一部のものは、３個以上のＩＭ
Ｃ結晶が線状に結合した複数の連鎖状ＩＭＣ結晶を構成
し、ＩＭＣ結晶の体積分率Ｖｆ1 に対する連鎖状ＩＭＣ
結晶の体積分率Ｖｆ2 の比率ＡをＡ≧３０％に設定した
ことを特徴とする高強度Ａｌ合金。1. Al having a metallic structure having an amorphous phase
An Al alloy obtained by crystallizing an alloy material,
IMC having a matrix of crystals and intermetallic compound crystals (hereinafter referred to as IMC crystals) having a grain size d of d ≦ 1.2 μm dispersed in the crystal grain boundaries of the matrix.
At least some of the crystals are three or more IM
A plurality of chain-shaped IMC crystals in which C crystals are linearly bonded to each other are formed, and the chain-shaped IMC with respect to the volume fraction Vf 1 of the IMC crystals.
A high-strength Al alloy characterized in that the ratio A of the crystal volume fraction Vf 2 is set to A ≧ 30%.
晶の体積分率Ｖｆ1が５％≦Ｖｆ1 ≦４０％である、請
求項１記載の高強度Ａｌ合金。2. The high-strength Al alloy according to claim 1, wherein the volume fraction Vf 1 of the IMC crystal having a grain size d of d ≦ 1.2 μm is 5% ≦ Vf 1 ≦ 40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16028992A JPH05331585A (en) | 1992-05-27 | 1992-05-27 | High strength al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16028992A JPH05331585A (en) | 1992-05-27 | 1992-05-27 | High strength al alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05331585A true JPH05331585A (en) | 1993-12-14 |
Family
ID=15711769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16028992A Pending JPH05331585A (en) | 1992-05-27 | 1992-05-27 | High strength al alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05331585A (en) |
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| WO2020158682A1 (en) | 2019-01-31 | 2020-08-06 | 古河電気工業株式会社 | Aluminum alloy material, and electroconductive member, battery member, fastening component, spring component, structural component and cabtyre cable each using same |
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1992
- 1992-05-27 JP JP16028992A patent/JPH05331585A/en active Pending
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