JPH0542356A - Production of fiber reinforced composite member - Google Patents
Production of fiber reinforced composite memberInfo
- Publication number
- JPH0542356A JPH0542356A JP22644091A JP22644091A JPH0542356A JP H0542356 A JPH0542356 A JP H0542356A JP 22644091 A JP22644091 A JP 22644091A JP 22644091 A JP22644091 A JP 22644091A JP H0542356 A JPH0542356 A JP H0542356A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- preform
- pressure
- reinforced composite
- composite member
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無機繊維で強化された
金属複合部材の製造方法に関し、詳しくは高圧凝固鋳造
法（加圧鋳造、溶湯鍛造、スクイズキャスティング等）
を用いて無機繊維成形体（プリフォーム）へ溶湯を含浸
させ、複合化する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal composite member reinforced with an inorganic fiber, more specifically, high pressure solidification casting method (pressure casting, molten metal forging, squeeze casting, etc.).
The present invention relates to a method in which an inorganic fiber molded body (preform) is impregnated with a molten metal by using to form a composite.
【０００２】[0002]
【従来の技術】従来、セラミックスやウィスカーなどの
無機繊維で形成したプリフォームに、金属マトリックス
の溶湯を高圧凝固鋳造法によって充填複合させる際に、
加圧の初期に溶湯圧力を緩かに連続的に上昇させ、次い
で急速に上昇させ、最大値に到達させて、そのまま、そ
の加圧状態を一定時間保持する方法が知られている（特
公昭５３−１２４４６号公報参照）。2. Description of the Related Art Conventionally, when a preform formed of inorganic fibers such as ceramics and whiskers is filled with a molten metal matrix by a high pressure solidification casting method,
A method is known in which the pressure of the molten metal is gradually and continuously increased at the initial stage of pressurization, then rapidly raised to a maximum value, and the pressurized state is maintained for a certain period of time (Japanese Patent Publication No. 53-12446 gazette).
【０００３】また、同様に金型内に収容したプリフォー
ムに対し、金属マトリックスの溶湯を注入した後、溶湯
加圧パンチを備えた加圧シリンダにおいて最初は一定の
低圧で加圧して金属溶湯をプリフォーム内に浸透させ、
充填完了後、直ちに最高圧まで加圧する方法が知られて
いる（特公平３−３５３９号公報参照）。Similarly, after a molten metal matrix is poured into a preform housed in a mold, the molten metal is first pressurized at a constant low pressure in a pressure cylinder equipped with a molten metal press punch. Soak into the preform,
A method is known in which, immediately after the completion of filling, the pressure is increased to the maximum pressure (see Japanese Patent Publication No. 3-3539).
【０００４】[0004]
【発明が解決しようとする課題】従来例の前者の方法に
おいては、プリフォームの嵩密度が約０．６ｇ／ｃｍ3
を超えると、プリフォーム内への溶湯の浸入抵抗が増大
し、プリフォームの変形が大きくなり、適用できないと
いう問題点がある。In the former method of the conventional example, the bulk density of the preform is about 0.6 g / cm 3.
If it exceeds, the resistance to infiltration of the molten metal into the preform increases, the deformation of the preform increases, and there is a problem that it cannot be applied.
【０００５】一方、後者の従来例は、一定の抵抗によっ
て生ずる溶湯の浸入速度が遅いため、その間に溶湯の冷
却が生じ、結果として充分な複合化ができないという欠
点があった。On the other hand, the latter conventional example has a drawback that the molten metal infiltrating speed caused by a constant resistance is slow, so that the molten metal is cooled during that period, and as a result, sufficient complexing cannot be achieved.
【０００６】本発明は、前記事情に鑑みてなされたもの
で、前記問題点を解消した繊維強化複合部材の製造方法
を提供することを目的とする。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for manufacturing a fiber-reinforced composite member that solves the above problems.
【０００７】[0007]
【課題を解決するための手段】前記目的に添って、本発
明者は鋭意研究を重ねた結果、次の事実を知得した。即
ち １）プリフォームには、その種類、密度、構成などによ
り溶湯が浸入を開始するしきい値があること。 ２）プリフォームへ浸入開始後の溶湯圧力は、溶湯の浸
入速度と、浸入距離に比例すること。 ３）複合化時のプリフォームの変形は溶湯浸入時の力に
よって発生するとともに、この力に対してプリフォーム
自身の強度が不足する場合に発生する。 ４）金型温度が溶湯の液相温度より低い場合、金型内に
注入された溶湯は速かに凝固を開始する。また、これは
複合化行程に時間がかかる場合も同様で、溶湯の固相率
が高くなると良好な複合化はできない。Means for Solving the Problems In accordance with the above object, the present inventor has earnestly studied and, as a result, has learned the following fact. That is, 1) The preform has a threshold value at which the molten metal starts to infiltrate depending on its type, density, configuration, and the like. 2) The molten metal pressure after starting to penetrate the preform must be proportional to the molten metal infiltration rate and the infiltration distance. 3) The deformation of the preform at the time of compounding is caused by the force at the time of infiltration of the molten metal, and occurs when the strength of the preform itself is insufficient with respect to this force. 4) When the mold temperature is lower than the liquidus temperature of the molten metal, the molten metal injected into the mold quickly starts solidification. This is also the case when the complexing process takes a long time, and good complexing cannot be achieved when the solid fraction of the molten metal increases.
【０００８】よって、これらの知見に基き、本発明は鋳
造用金型にプリフォームをセットし、これにマトリック
ス金属の溶湯を注入加圧して繊維強化複合材を製造する
場合において、注入した溶湯が前記プリフォームに浸入
を開始するしきい値に到するまで、急速に溶湯を加圧
し、プリフォームへの浸入開始後は一定勾配で圧力を増
加させ、プリフォーム内への充填が終り次第、急速に最
高値まで加圧することによって前記課題を解決した。Therefore, based on these findings, according to the present invention, when a preform is set in a casting mold and a molten metal of a matrix metal is injected and pressurized to produce a fiber-reinforced composite material, the injected molten metal is Rapidly pressurize the molten metal until reaching the threshold value to start the infiltration into the preform, and increase the pressure at a constant gradient after the infiltration into the preform. The above-mentioned problem was solved by pressurizing to the maximum value.
【０００９】即ち、図２に示すように、注入した溶湯が
プリフォームに浸入を開始するしきい値（図の加圧時間
ａの位置の溶湯圧力Ａ）に到するまで急速に加圧し、溶
湯がプリフォームへ浸入を開始し、プリフォームへの充
填が完了した時間ｂ（溶湯圧力Ｂ）までは溶湯圧力は一
定勾配で圧力を増加させる。そしてプリフォームへの充
填が終り次第、急速に最高値（図の時間Ｃの位置の溶湯
圧力Ｃ）まで加圧するものである。That is, as shown in FIG. 2, the molten metal is rapidly pressurized until it reaches a threshold value (the molten metal pressure A at the position of the pressurizing time a in the figure) at which the molten metal starts to infiltrate the preform, and the molten metal is melted. Starts to infiltrate into the preform, and the molten metal pressure increases at a constant gradient until time b (molten metal pressure B) when the filling into the preform is completed. Then, as soon as the filling of the preform is completed, the pressure is rapidly increased to the maximum value (molten metal pressure C at the position of time C in the figure).
【００１０】以下、本発明の実施例について図面を参照
しながら詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１１】[0011]
（１）図１は本発明の実施に用いた装置を概念的に示
し、１は金型、２は加圧パンチ、３は加圧パンチを加圧
する油圧シリンダ、４は金型１内にセットされたプリフ
ォーム、５は注入された溶湯を示す。(1) FIG. 1 conceptually shows an apparatus used for carrying out the present invention, 1 is a mold, 2 is a pressure punch, 3 is a hydraulic cylinder which pressurizes the pressure punch, and 4 is set in the mold 1. The formed preform 5 shows the injected molten metal.
【００１２】溶湯５はアルミニウム合金のＪＩＳ ＡＣ
８Ａを７００℃の温度で溶解したものを用いる。プリフ
ォーム４はＳｉＣウィスカーを用い、形状寸法８０×８
０×３０ｍｍとし、体積率（Ｖｆ）２５％ に成形し
た。また予熱温度は７００℃とした。金型１は内径寸法
１００×１００ｍｍで、２５０℃の温度に予熱した。The molten metal 5 is JIS AC of aluminum alloy.
What melt | dissolved 8A at the temperature of 700 degreeC is used. The preform 4 uses SiC whiskers, and the shape dimensions are 80 × 8.
It was set to 0 × 30 mm and molded into a volume ratio (Vf) of 25%. The preheating temperature was 700 ° C. The mold 1 had an inner diameter of 100 × 100 mm and was preheated to a temperature of 250 ° C.
【００１３】以上の条件で、１．５ｋｇの溶湯５を金型
１内に注入し、加圧パンチ２を３０ｍｍ／ｓｅｃの速さ
で下降させた。この加圧パンチ２が溶湯５の上面に達し
た直後に、溶湯圧力が３０ｋｇ／ｃｍ2 （しきい値）と
なるまで急速に加圧して、複合化を開始した。開始後は
一定勾配の圧力即ち４８０ｋｇ／ｃｍ2 ／ｓｅｃの割合
で圧力を増加し、２４０ｋｇ／ｃｍ2 の圧力に達した時
点で、急速に最高圧１０００ｋｇ／ｃｍ2 まで上昇させ
て加圧した。この時の溶湯圧力と加圧時間との関係を図
３に示す。すなわち、溶湯圧力３０ｋｇ／ｃｍ2 となる
まで０．０５ｓｅｃ、溶湯圧力２４０ｋｇ／ｃｍ2 とな
るまでに０．５ｓｅｃ、溶湯圧力１０００ｋｇ／ｃｍ2
となるまでに０．７ｓｅｃを要した。Under the above conditions, 1.5 kg of the molten metal 5 was poured into the mold 1, and the pressure punch 2 was lowered at a speed of 30 mm / sec. Immediately after the press punch 2 reached the upper surface of the molten metal 5, the molten metal was rapidly pressurized until the molten metal pressure reached 30 kg / cm 2 (threshold value), and the composite formation was started. After the start, the pressure was increased at a constant gradient pressure, that is, at a rate of 480 kg / cm 2 / sec, and when the pressure reached 240 kg / cm 2 , the maximum pressure was rapidly increased to 1000 kg / cm 2 for pressurization. The relationship between the molten metal pressure and the pressurization time at this time is shown in FIG. That is, it takes 0.05 sec until the molten metal pressure reaches 30 kg / cm 2 , 0.5 sec before the molten metal pressure reaches 240 kg / cm 2, and the molten metal pressure 1000 kg / cm 2.
It took 0.7 seconds to reach.
【００１４】前記処理によって得られた複合材を検査し
たところ、プリフォーム４の厚さ３０ｍｍが２８ｍｍに
変形していたが実用上、この程度の変形は問題のないレ
ベルであることが確認できた。この時、使用したプリフ
ォームはバインダーを使用せずに成形したもので、プリ
フォーム自体の強度は低いものであった。そしてバイン
ダーを使用して強化したプリフォームを用い、同一条件
で複合化処理をおこなったところ、プリフォームの変形
は、全くないことが確認できた。よってバインダーは複
合化材としての必要条件に応じて適宜、使用すればよい
ことが判明した。When the composite material obtained by the above treatment was inspected, it was confirmed that the thickness 30 mm of the preform 4 was deformed to 28 mm, but in practical use, this degree of deformation was at a level without any problem. .. At this time, the preform used was formed without using a binder, and the preform itself had low strength. When the compounding treatment was performed under the same conditions using the preform reinforced with the binder, it was confirmed that the preform was not deformed at all. Therefore, it was found that the binder may be appropriately used according to the necessary conditions as the composite material.
【００１５】また、前記一定勾配の圧力（加圧勾配）
は、実験の結果、１２０〜９００ｋｇ／ｃｍ2 ／ｓｅｃ
の範囲で良好な複合状態が得られた。Further, the pressure of the constant gradient (pressurization gradient)
Is 120 to 900 kg / cm 2 / sec as a result of the experiment.
A good composite state was obtained within the range.
【００１６】（２）比較例として前記実施例（１）と同
一条件で、加圧パンチ２の下降速度のみを３ｍｍ／ｓｅ
ｃとして同様な処理をおこなった。この時の溶湯圧力の
上昇勾配は４８ｋｇ／ｃｍ2 ／ｓｅｃであった。(2) As a comparative example, only the descending speed of the pressure punch 2 is 3 mm / se under the same conditions as in the above-mentioned embodiment (1).
Similar processing was performed for c. The rising gradient of the molten metal pressure at this time was 48 kg / cm 2 / sec.
【００１７】この方法で処理した複合材を切断して、複
合化状態を調査したところ、プリフォームの下部であっ
て、プリフォーム全体の高さの約１／４の領域に溶湯が
充填されていない部分があり、また、プリフォームの変
形も、前記実施例における許容されうる変形の範囲を超
えていた。The composite material treated by this method was cut, and the composite state was investigated. As a result, the molten metal was filled in the lower part of the preform, about 1/4 of the height of the entire preform. There was no part, and the deformation of the preform was beyond the range of allowable deformation in the above-mentioned examples.
【００１８】また、この処理において溶湯がプリフォー
ムへ浸透するのに要した時間は約５ｓｅｃであり、この
間に溶湯の温度降下が大きくなり、固相が増加したもの
と思われる。The time required for the molten metal to permeate into the preform in this treatment was about 5 seconds, and it is considered that the temperature drop of the molten metal became large during this period and the solid phase increased.
【００１９】上記、実施例と比較例との結果から、複合
化時の加圧勾配は適度な範囲に設定する必要があり、前
記実施例では良好な複合状態を得る加圧勾配の範囲は、
１２０ｋｇ／ｃｍ2 ／ｓｅｃ〜９００ｋｇ／ｃｍ2 ／ｓ
ｅｃであった。From the results of the above Examples and Comparative Examples, it is necessary to set the pressurizing gradient at the time of compounding to an appropriate range. In the above Examples, the range of the pressurizing gradient for obtaining a good composite state is
120kg / cm 2 / sec~900kg / cm 2 / s
It was ec.
【００２０】なお、良好な複合化を可能にする影響の大
きい因子として、プリフォームの大小、強弱、及び溶湯
量があり、プリフォームの大きさが大きいとき、溶湯量
が少量の時には加圧勾配は急とする必要があり、このと
きにはプリフォームの強度も大でなければならない。プ
リフォームの大きさが小さいとき、溶湯量が多量のとき
には加圧勾配を緩かにとることが出来、このときにはプ
リフォームの強度が小さくても良好な複合化が可能であ
る。其他、金型温度、溶湯湯度、溶湯の種類、プリフォ
ームの種類、体積率などの他の因子にも影響されること
は述べるまでもない。Factors that have a great influence on enabling good composite formation are the size of the preform, strength, and the amount of molten metal. When the size of the preform is large, the pressurizing gradient is used when the amount of molten metal is small. Must be steep and the preform must be strong at this time. When the size of the preform is small and the amount of molten metal is large, the pressure gradient can be made gentle, and at this time, good composite formation is possible even if the strength of the preform is small. Needless to say, it is also affected by other factors such as mold temperature, molten metal degree, molten metal type, preform type, and volume ratio.
【００２１】[0021]
【発明の効果】本発明の方法によれば、良好な複合化状
態を呈する繊維強化複合部材がえられる。According to the method of the present invention, a fiber-reinforced composite member exhibiting a good composite state can be obtained.
【図１】本発明に係る方法を実施する装置の概念的な説
明図である。1 is a schematic illustration of a device for carrying out the method according to the invention.
【図２】本発明に係る方法に関する溶湯圧力と加圧時間
との関係を示す図である。FIG. 2 is a diagram showing a relationship between a molten metal pressure and a pressurizing time regarding a method according to the present invention.
【図３】本発明に係る方法の実施例における溶湯圧力と
加圧時間との関係を示す図である。FIG. 3 is a diagram showing a relationship between a molten metal pressure and a pressurizing time in an example of the method according to the present invention.
１ 金型 ２ 加圧パンチ ４ プリフォーム ５ 溶湯 1 mold 2 pressure punch 4 preform 5 molten metal
Claims (2)
これにマトリックス金属の溶湯を注入加圧して繊維強化
複合材を製造する場合において、注入した溶湯が前記プ
リフォームに浸入を開始するしきい値に到するまで、急
速に溶湯を加圧し、プリフォームへの浸入開始後は一定
勾配で圧力を増加させ、プリフォーム内への充填が終り
次第、急速に最高値まで加圧することを特徴とする繊維
強化複合部材の製造方法。1. A preform is set in a casting mold,
When producing a fiber reinforced composite material by injecting and pressing a molten metal of a matrix metal into this, the molten metal is rapidly pressurized until the injected molten metal reaches a threshold value at which the molten metal begins to penetrate into the preform, and the preform A method for producing a fiber-reinforced composite member, characterized in that the pressure is increased at a constant gradient after infiltration into the preform, and the pressure is rapidly increased to the maximum value as soon as the filling into the preform is completed.
０ｋｇ／ｃｍ2 ／ｓｅｃであることを特徴とする請求項
１に記載の繊維強化複合部材の製造方法。2. The constant gradient increasing pressure is 120 to 90.
It is 0 kg / cm < 2 > / sec, The manufacturing method of the fiber reinforced composite member of Claim 1 characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22644091A JP2964721B2 (en) | 1991-08-12 | 1991-08-12 | Method for producing fiber-reinforced composite member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22644091A JP2964721B2 (en) | 1991-08-12 | 1991-08-12 | Method for producing fiber-reinforced composite member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0542356A true JPH0542356A (en) | 1993-02-23 |
| JP2964721B2 JP2964721B2 (en) | 1999-10-18 |
Family
ID=16845145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22644091A Expired - Fee Related JP2964721B2 (en) | 1991-08-12 | 1991-08-12 | Method for producing fiber-reinforced composite member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2964721B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7196261B2 (en) | 2002-04-05 | 2007-03-27 | Yamaha Corporation | Electronic percussion instrument for producing sound at intended loudness and electronic percussion system using the same |
| JP2010120070A (en) * | 2008-11-21 | 2010-06-03 | Daihatsu Motor Co Ltd | Die for low pressure casting |
| KR102386819B1 (en) * | 2020-12-18 | 2022-04-14 | 주식회사 레오포즈 | Rheo-forged products reinforced by carbon fiber net and its manufacturing method |
-
1991
- 1991-08-12 JP JP22644091A patent/JP2964721B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7196261B2 (en) | 2002-04-05 | 2007-03-27 | Yamaha Corporation | Electronic percussion instrument for producing sound at intended loudness and electronic percussion system using the same |
| JP2010120070A (en) * | 2008-11-21 | 2010-06-03 | Daihatsu Motor Co Ltd | Die for low pressure casting |
| KR102386819B1 (en) * | 2020-12-18 | 2022-04-14 | 주식회사 레오포즈 | Rheo-forged products reinforced by carbon fiber net and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2964721B2 (en) | 1999-10-18 |
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