JP3073105B2 - Manufacturing method of light alloy composite member - Google Patents
Manufacturing method of light alloy composite memberInfo
- Publication number
- JP3073105B2 JP3073105B2 JP04285282A JP28528292A JP3073105B2 JP 3073105 B2 JP3073105 B2 JP 3073105B2 JP 04285282 A JP04285282 A JP 04285282A JP 28528292 A JP28528292 A JP 28528292A JP 3073105 B2 JP3073105 B2 JP 3073105B2
- Authority
- JP
- Japan
- Prior art keywords
- porous metal
- metal body
- preform
- light alloy
- reinforcing material
- 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.)
- Expired - Fee Related
Links
Landscapes
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、セラミック短繊維やセ
ラミックウィスカ、粒子などの強化材を含むプリフォー
ムを形成し、これに高圧鋳造法等の手段により軽合金溶
湯を含浸させることにより、軽合金製複合部材を製造す
る方法に関する。BACKGROUND OF THE INVENTION The present invention relates to a preform containing a reinforcing material such as ceramic short fibers, ceramic whiskers and particles, which is impregnated with a light alloy melt by means such as a high-pressure casting method. The present invention relates to a method for manufacturing an alloy composite member.
【0002】[0002]
【従来の技術】従来より、この種のプリフォームの成形
法としては、例えば図5に示すような吸引脱水成形法が
一般的に用いられている。この吸引脱水成形法によれ
ば、プリフォームは、強化材と小量の無機バインダー
(シリカゾル等)を水に混合・攪はんして原料スラリー
1を準備する工程、この原料スラリー1を吸引脱水型2
に供給しフィルター3を通して吸引脱水する工程、その
後、フィルター3上に堆積した強化材からなる成形体4
を取り出し、これを加熱乾燥する工程、次いで焼成して
無機バインダーにより強化材を部分的に結合する工程、
を経て製造される。2. Description of the Related Art Conventionally, as a method for forming a preform of this type, for example, a suction dehydration forming method as shown in FIG. 5 has been generally used. According to this suction dehydration molding method, the preform is prepared by mixing and stirring a reinforcing material and a small amount of an inorganic binder (silica sol, etc.) in water to prepare a raw material slurry 1, Type 2
And a step of suction dehydration through the filter 3, and thereafter, a molded body 4 made of a reinforcing material deposited on the filter 3.
Taking out, heating and drying this, then firing and partially binding the reinforcing material with an inorganic binder,
It is manufactured through
【0003】このようなプリフォームは、図5に示す円
盤形状のみならず、強化の必要な部位に応じた形状のも
のを得ることができ、例えば特公平4−25335号公
報には、エンジンのシリンダライナの強化に使用する円
筒状プリフォームを吸引脱水成形する技術が開示されて
いる。[0003] Such a preform can be obtained not only in a disk shape shown in Fig. 5 but also in a shape corresponding to a portion requiring reinforcement. For example, Japanese Patent Publication No. 4-25335 discloses an engine preform. There is disclosed a technique for performing suction dehydration molding of a cylindrical preform used for strengthening a cylinder liner.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、従来の
吸引脱水成形法には、次の〜に示すような問題点が
あった。すなわち、吸引脱水後の成形体4は多量の水
分を含み保形性が悪く、乾燥、焼成に至るハンドリング
の過程で崩壊し易い。乾燥、焼成の過程でクラックが
発生したり、変形や寸法変化が生じ易い。高圧鋳造金
型にセットする過程や合金溶湯を含浸する過程でプリフ
ォームにクラックが発生し易い。However, the conventional suction dehydration molding method has the following problems. That is, the molded body 4 after suction dehydration contains a large amount of water and has poor shape retention, and easily collapses in the handling process from drying to firing. Cracks, deformations and dimensional changes are liable to occur in the course of drying and firing. Cracks are likely to occur in the preform during the process of setting it in a high-pressure casting mold or the process of impregnating with a molten alloy.
【0005】このような問題点を改善するには、ポリビ
ニルアルコール等の有機バインダーの併用や無機バイン
ダーの増量により、成形体の強度を向上することが有効
とされている。しかし、バインダーを増量すると、スラ
リーの粘度上昇により吸引成形性が大幅に低下するほ
か、含浸される軽合金溶湯中の合金成分(Mg)が無機
バインダーのSiO2と反応して消費され、複合部材の
性能低下の原因となるなどの欠点がでてくるため、これ
らバインダーの増量には限界がある。In order to solve such problems, it is effective to improve the strength of a molded article by using an organic binder such as polyvinyl alcohol or increasing the amount of an inorganic binder. However, when the amount of the binder is increased, the suction moldability is greatly reduced due to the increase in the viscosity of the slurry, and the alloy component (Mg) in the impregnated light alloy melt is consumed by reacting with the inorganic binder SiO 2, and the composite member is consumed. However, there is a drawback such as a decrease in the performance of the binder, and there is a limit in increasing the amount of these binders.
【0006】一方、プリフォームの形成に使用する強化
材は一般的に高価であるため、必要部位に必要最小限の
強化材を用いるとの観点から、最近では、プリフォーム
の形状の薄肉化とともに強化材の体積率の減少が求めら
れている。例えば、エンジン用シリンダのライナ部分の
強化に使用する円筒状プリフォームは、強化作用の観点
からは厚さ3mm程度でも十分であり、その強化材体積
率も従来は10〜30%としていたが、これを5%程度
としても強化作用の観点からは特に差し支えないことが
知られている。On the other hand, since the reinforcing material used for forming the preform is generally expensive, from the viewpoint of using the minimum necessary reinforcing material in a necessary portion, recently, with the thinning of the shape of the preform, There is a need for a reduction in the volume fraction of the reinforcement. For example, a cylindrical preform used to reinforce the liner portion of an engine cylinder requires a thickness of about 3 mm from the viewpoint of the reinforcement effect, and the volume ratio of the reinforcer is conventionally 10 to 30%. It is known that even if this is set to about 5%, there is no particular problem from the viewpoint of the reinforcing effect.
【0007】しかし、このようにプリフォームを薄肉化
するときは、吸引脱水後の成形体の保形性及び焼成後の
強度が一層劣ることとなり、一方、強化材体積率を5%
程度にまで下げることは通常の吸引脱水成形法では困難
であるとともに、やはり吸引脱水後の成形体の保形性及
び焼成後の強度が低下することから、今まで以上に上記
〜の問題点が顕在化することは避けられない。However, when the thickness of the preform is reduced in this way, the shape retention of the molded body after suction dehydration and the strength after firing are further deteriorated, while the volume ratio of the reinforcing material is 5%.
It is difficult to reduce to the extent by the normal suction dehydration molding method, and also the shape retention of the molded body after the suction dehydration and the strength after firing are reduced, so the above-mentioned problems are more than before. It is inevitable that it will become apparent.
【0008】さらに、従来の吸引脱水成形法により、例
えば円筒状プリフォームを形成するような場合、前記特
公平4−25335号公報に示されるように、プリフォ
ームを得るまでの工程数が多いばかりでなく、円筒状フ
ィルター(同公報では成形型と称する)を除去する過程
でプリフォーム素材を損傷する恐れがあるという問題点
があった。Further, in the case where, for example, a cylindrical preform is formed by a conventional suction dehydration molding method, as shown in the above-mentioned Japanese Patent Publication No. 4-25335, the number of steps required until a preform is obtained is large. However, there is a problem that the preform material may be damaged in the process of removing the cylindrical filter (referred to as a mold in the same publication).
【0009】本発明は、このような問題点を解決するた
めになされたもので、上記〜に挙げた問題点がな
く、しかも、プリフォームの形状の薄肉化及び強化材の
体積率の減少にも自在に対応することができ、加えて工
程を簡素化することができる軽合金製複合部材の製造方
法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and does not have the above-mentioned problems. In addition, the present invention is intended to reduce the thickness of the preform and reduce the volume ratio of the reinforcing material. It is another object of the present invention to provide a method of manufacturing a light alloy composite member that can flexibly cope with the above and can simplify the process.
【0010】[0010]
【課題を解決するための手段】上記目的を達成するた
め、本発明に関わる軽合金製複合部材の製造方法は、連
通気孔を有する金属多孔体を強化材を含む液体中に浸漬
し、金属多孔体に対し吸引作用を施すことによりその気
孔内に強化材を分散させ、乾燥してプリフォームとした
後、これを成形型内に配置して気孔内に軽合金溶湯を含
浸することを特徴とする。なお、吸引作用に代えて、ス
ラリーに対し外部から加圧作用を施すようにしても同様
の効果を得ることができる。In order to achieve the above object, a method for producing a light alloy composite member according to the present invention comprises immersing a porous metal body having continuous air holes in a liquid containing a reinforcing material, By applying a suction action to the body, the reinforcing material is dispersed in the pores and dried to form a preform, which is then placed in a molding die and the light alloy melt is impregnated in the pores. I do. The same effect can be obtained by applying a pressurizing action to the slurry from the outside instead of the suction action.
【0011】このように、本発明におけるプリフォーム
は、金属多孔体とその気孔内に分散された強化材とから
構成される。ここで、金属多孔体は、連通気孔を有し且
つフィルター機能を有する3次元多孔体をいい、例え
ば、発泡ウレタン樹脂の気泡内表面に導電性物質を付着
し導電性とし、さらに金属をメッキし、次いでウレタン
樹脂を焼失させて製造した市販の発泡金属(図4参照)
が好適であり、その気孔率は約70〜98%程度であ
る。また、強化材は、セラミック短繊維やウィスカ、黒
鉛等の粒子など、母材となる軽金属の強度や耐摩耗性な
どを向上させるものであればよく、これらを組み合わせ
て用いることもできる。As described above, the preform according to the present invention comprises the porous metal body and the reinforcing material dispersed in the pores. Here, the porous metal body refers to a three-dimensional porous body having continuous ventilation holes and having a filter function. For example, a conductive substance is attached to the inner surface of the foamed urethane resin to make it conductive, and then the metal is plated. And then a commercially available foamed metal produced by burning off the urethane resin (see FIG. 4)
Is preferable, and its porosity is about 70 to 98%. The reinforcing material may be any material that improves the strength and abrasion resistance of a light metal serving as a base material, such as particles of ceramic short fibers, whiskers, and graphite, and may be used in combination.
【0012】本発明を例えばエンジン用シリンダブロッ
クのシリンダに適用する場合、筒状金属多孔体を使用
し、好ましくはその内周面に目の細かいフィルター(濾
紙等)を当接し、筒状金属多孔体内部から吸引作用を施
し、筒状金属多孔体の内側に強化材を高濃度に分散させ
るのがよい。さらに、軽合金含浸後、熱処理を施すこと
により、金属多孔体と軽合金母材との間に金属間化合物
を形成してもよい。When the present invention is applied to, for example, a cylinder of a cylinder block for an engine, a cylindrical metal porous body is used, and preferably a fine-grained filter (filter paper or the like) is brought into contact with an inner peripheral surface of the cylindrical metal porous body. It is preferable to apply a suction action from the inside of the body to disperse the reinforcing material at a high concentration inside the cylindrical porous metal body. Further, after the light alloy impregnation, heat treatment may be performed to form an intermetallic compound between the porous metal body and the light alloy base material.
【0013】[0013]
【作用】本発明に従い、連通気孔を有する金属多孔体を
強化材を含む液体中に浸漬し、金属多孔体に対し吸引作
用又は加圧作用を施すときは、多孔体はフィルター機能
を果たし、液体は連通気孔を通じて排出され、強化材の
大部分は気孔内にトラップされるので、気孔内に強化材
が濃化・堆積することになる。次に、金属多孔体ごと乾
燥することにより、気孔内に強化材がほぼ均一に分散し
た金属多孔体、即ちプリフォームを得ることができる。According to the present invention, when a porous metal body having continuous air holes is immersed in a liquid containing a reinforcing material and a suction action or a pressurization action is applied to the porous metal body, the porous body performs a filter function, Is discharged through the continuous vent, and most of the reinforcement is trapped in the pores, so that the reinforcement is concentrated and accumulated in the pores. Next, by drying the entire porous metal body, a porous metal body in which the reinforcing material is substantially uniformly dispersed in the pores, that is, a preform can be obtained.
【0014】また、先に示した従来の吸引脱水成形法で
は、強化材の体積率の低いプリフォームを形成すること
は困難であったが、本発明においては強化材の堆積量を
自在に選択できるので、例えば5%程度の低い体積率の
プリフォームでも容易に形成することができる。Although it is difficult to form a preform having a low volume ratio of the reinforcing material by the conventional suction dehydration molding method described above, in the present invention, the amount of the reinforcing material deposited can be freely selected. Therefore, a preform having a low volume ratio of, for example, about 5% can be easily formed.
【0015】そして、本発明に関わるプリフォームは、
金属多孔体で形状保持されるため、ハンドリングや乾
燥、焼成時の崩壊やクラックが完全に防止でき、またプ
リフォームの寸法精度も向上する。さらに、プリフォー
ムが薄肉の場合でも剛性が高いため、鋳造金型へのセッ
トや位置決めが容易であり、高圧で含浸される合金溶湯
の圧力によりクラックが発生することもなく、健全な複
合部材を得ることができる。The preform according to the present invention is:
Since the shape is maintained by the porous metal body, collapse and cracks during handling, drying, and firing can be completely prevented, and the dimensional accuracy of the preform is improved. Furthermore, since the rigidity is high even when the preform is thin, it can be easily set and positioned in a casting mold, and cracks do not occur due to the pressure of the molten alloy impregnated at a high pressure. Obtainable.
【0016】本発明においては、強化材は金属多孔体の
気孔内に保持されているので、従来のプリフォーム成形
法と異なり、液体中に無機バインダーを添加する必要は
なく、従って焼成の必要もない。しかし、小量の無機バ
インダーを使用し乾燥後焼成することにより、強化材同
士及び強化材と金属多孔体の結合力を高め、金属多孔体
の表面付近の強化材の脱落を防止することができるの
で、必要に応じて無機バインダーを添加するとよい。そ
のほか、液体中での強化材の分散性を向上させるため表
面活性剤を添加するなど、適宜なし得るところである。In the present invention, since the reinforcing material is held in the pores of the porous metal body, unlike the conventional preform molding method, it is not necessary to add an inorganic binder to the liquid, and thus it is not necessary to fire. Absent. However, by baking after drying using a small amount of inorganic binder, it is possible to increase the bonding strength between the reinforcing materials and between the reinforcing material and the porous metal, and to prevent the reinforcing material from falling off near the surface of the porous metal. Therefore, an inorganic binder may be added as needed. In addition, a surface-active agent may be added to improve the dispersibility of the reinforcing material in the liquid, and the like can be appropriately performed.
【0017】複合部材の一方の面を特に強化する必要が
あるとき、例えばエンジン用シリンダブロックのシリン
ダのように特にその内周面の耐摩耗性を向上させる必要
があるときは、筒状金属多孔体の内周面に濾紙のような
目の細かいフィルターを当接し、筒状金属多孔体内部か
ら吸引作用を施す。すると、連通気孔を通過して流出し
ようとした強化材が、濾紙に遮られて筒状金属多孔体の
内面付近に堆積し、その付近の強化材の体積率が大きく
なり、シリンダ内面の耐摩耗性を向上させることができ
る。なお、このようにフィルターを使用する方法は、他
の部材を製造する際にも適用することができることはい
うまでもない。When it is necessary to reinforce one surface of the composite member, for example, when it is necessary to improve the abrasion resistance of the inner peripheral surface thereof, for example, as in a cylinder of an engine cylinder block, a cylindrical metal porous member is used. A fine filter such as filter paper is brought into contact with the inner peripheral surface of the body to apply a suction action from the inside of the porous metal body. Then, the reinforcing material that tries to flow out through the continuous ventilation holes is blocked by the filter paper and accumulates near the inner surface of the cylindrical porous metal body. Performance can be improved. In addition, it goes without saying that the method of using the filter as described above can be applied to the case of manufacturing other members.
【0018】さらに、本発明において、金属多孔体とし
てNi系、Cu系、Fe系のいずれかを使用し、軽合金
の含浸後、熱処理を施すときは、金属多孔体と軽合金母
材の界面に硬質の金属間化合物が形成され、複合部材の
強度及び耐摩耗性等を一層改善することができる。な
お、金属間化合物を形成するときは、プリフォームの焼
成は真空中で行い、金属多孔体の表面に酸化皮膜が形成
されないようにするのが望ましい。Further, in the present invention, when any one of Ni-base, Cu-base and Fe-base is used as the metal porous body and the heat treatment is performed after the impregnation of the light alloy, the interface between the porous metal body and the light alloy base material is used. A hard intermetallic compound is formed in the composite member, and the strength and wear resistance of the composite member can be further improved. When the intermetallic compound is formed, it is desirable that the preform be fired in a vacuum so that an oxide film is not formed on the surface of the porous metal body.
【0019】[0019]
【実施例】以下、本発明の実施例を説明する。Embodiments of the present invention will be described below.
【0020】(実施例1)金属多孔体として、気孔率9
5%、気孔数44〜55個/インチ(2.54cm)の
Ni系の発泡金属(厚さ5mmの円盤)を使用し、強化
材として、ほう酸アルミニウムウィスカ(繊維径1μm
以下、平均長さ30μm)を使用した。上記ウィスカと
小量のシリカゾルを水に混合し、ウィスカの重量%で5
%の原料スラリーを準備した。次に、上記金属多孔体を
図5と同様の吸引脱水装置(但し、フィルターは使用せ
ず)にセットし、上記原料スラリーを供給して吸引脱水
し、金属多孔体内部にウィスカを濃化・堆積させた。(Example 1) As a porous metal body, a porosity of 9 was used.
5%, 44-55 pores / inch (2.54 cm) Ni-based foamed metal (5 mm thick disk) was used, and aluminum borate whisker (fiber diameter 1 μm) was used as a reinforcing material.
Hereinafter, the average length was 30 μm). The above whisker and a small amount of silica sol are mixed with water, and the whisker is mixed with water at 5% by weight.
% Raw material slurry was prepared. Next, the above porous metal body is set in the same suction dehydrator as in FIG. 5 (however, a filter is not used), and the above raw material slurry is supplied to perform suction dehydration to concentrate whiskers inside the porous metal body. Deposited.
【0021】続いて、この金属多孔体を吸引装置から取
り出し、100℃で乾燥後、真空中で700℃に保持し
焼成して、円盤状プリフォームを得た。焼成後のプリフ
ォームの重量測定の結果からウィスカの体積率は約10
%(金属多孔体を含むと15%)であった。これを高圧
鋳造金型に配置し、Al合金(JIS、AC8A)溶湯
を高圧で含浸し円盤状複合部材を得た。Subsequently, the porous metal body was taken out of the suction device, dried at 100 ° C., kept at 700 ° C. in a vacuum, and fired to obtain a disc-shaped preform. From the result of the weight measurement of the preform after firing, the volume ratio of the whisker was about 10
% (Including the porous metal body, 15%). This was placed in a high-pressure casting mold, and a molten aluminum alloy (JIS, AC8A) was impregnated at high pressure to obtain a disc-shaped composite member.
【0022】(実施例2)金属多孔体として、気孔率9
0%、気孔数26〜35個/インチ(2.54cm)の
Ni系の円筒状発泡金属(外径80mm、肉厚5mm、
高さ150mm)を、強化材として黒鉛粒子(平均径2
μm)を使用した。黒鉛粒子と小量の界面活性剤を水に
混合し、黒鉛粒子の重量%で約20%の原料スラリーを
準備した。Example 2 Porous metal having a porosity of 9 was used.
0%, 26 to 35 pores / inch (2.54 cm) Ni-based cylindrical foamed metal (outer diameter 80 mm, wall thickness 5 mm,
Height 150 mm) as graphite particles (average diameter 2
μm) was used. Graphite particles and a small amount of a surfactant were mixed in water to prepare a raw slurry of about 20% by weight of the graphite particles.
【0023】次に、図1に示すように、上記円筒状金属
多孔体10の内周面全体に濾紙11を当て、その両端を
治具12a、12bにより密封し、脱水槽13内にセッ
トし、原料スラリー14を脱水槽13内に供給して吸引
脱水し、金属多孔体10内部にウィスカを濃化・堆積さ
せた。Next, as shown in FIG. 1, a filter paper 11 is applied to the entire inner peripheral surface of the cylindrical porous metal body 10, both ends of which are sealed with jigs 12 a and 12 b, and set in a dewatering tank 13. The raw material slurry 14 was supplied into the dewatering tank 13 and suction-dewatered, and whiskers were concentrated and deposited inside the porous metal body 10.
【0024】続いて、この金属多孔体10を脱水槽13
から取り出し、100℃で乾燥し円筒状プリフォーム2
0を得た。重量測定の結果から黒鉛粒子の体積率は約7
%(金属多孔体を含むと17%)であった。これを図2
又は図3に示す高圧鋳造金型(以下の段落で詳述)内に
配置し、Al合金(JIS、AC8A)溶湯を高圧鋳造
して複合部材を得た。さらに、500℃×6Hrの溶体
化熱処理を施し金属多孔体とアルミニウム合金の界面に
NiとAlの金属間化合物を形成、その後焼戻し熱処理
を施した。Subsequently, the porous metal body 10 is removed from the dewatering tank 13.
, Dried at 100 ° C and cylindrical preform 2
0 was obtained. From the result of the weight measurement, the volume ratio of the graphite particles was about 7
% (Including the metal porous body, 17%). Figure 2
Alternatively, a composite member was obtained by placing in a high-pressure casting mold (detailed in the following paragraph) shown in FIG. 3 and casting a molten aluminum alloy (JIS, AC8A) at high pressure. Further, a solution heat treatment at 500 ° C. × 6 hours was performed to form an intermetallic compound of Ni and Al at the interface between the porous metal body and the aluminum alloy, followed by a tempering heat treatment.
【0025】図2は、円筒状プリフォーム20にAl合
金溶湯を含浸させ、シリンダライナーを製造するための
高圧鋳造装置の例を示す。この高圧鋳造装置は、上型2
1、下型22、下型22に当接するスリーブ25、及び
スリーブ25内を摺動するポンチ26から構成され、上
型21と下型22で構成されるキャビティ内に円筒状プ
リフォーム20をセットし、ポンチ26の加圧力により
Al合金溶湯27を該プリフォーム20の気孔内に含浸
させるものである。FIG. 2 shows an example of a high-pressure casting apparatus for manufacturing a cylinder liner by impregnating a cylindrical preform 20 with a molten aluminum alloy. This high-pressure casting machine is an upper mold 2
1, a cylindrical preform 20 is set in a cavity formed by an upper mold 21 and a lower mold 22. The cylindrical preform 20 includes a lower mold 22, a sleeve 25 in contact with the lower mold 22, and a punch 26 sliding in the sleeve 25. Then, the Al alloy melt 27 is impregnated into the pores of the preform 20 by the pressing force of the punch 26.
【0026】図3は、同じく円筒状プリフォーム20に
Al合金溶湯を含浸させ、シリンダライナー部分のみ複
合強化されたシリンダブロックを一体的に製造するため
の高圧鋳造装置の例を示す。この高圧鋳造装置は、上型
31、下型32、サイド型33、下型32に当接するス
リーブ25、及びスリーブ25内を摺動するポンチ26
から構成され、上型31と下型32、及びサイド型33
で構成されるキャビティ内の所定位置に円筒状プリフォ
ーム20をセットし、ポンチ26の加圧力によりAl合
金溶湯27を該キャビティ内に流入させると同時に該プ
リフォーム20の気孔内に含浸させるものである。FIG. 3 shows an example of a high-pressure casting apparatus for integrally manufacturing a cylinder block in which a cylindrical preform 20 is impregnated with an Al alloy melt and only a cylinder liner portion is compositely reinforced. The high-pressure casting apparatus includes an upper die 31, a lower die 32, a side die 33, a sleeve 25 that contacts the lower die 32, and a punch 26 that slides inside the sleeve 25.
The upper mold 31 and the lower mold 32, and the side mold 33
The cylindrical preform 20 is set at a predetermined position in the cavity constituted by the following, and the Al alloy melt 27 is caused to flow into the cavity by the pressing force of the punch 26 and at the same time is impregnated into the pores of the preform 20. is there.
【0027】[0027]
【発明の効果】本発明におけるプリフォームは金属多孔
体で形状保持されるため、ハンドリングや乾燥、焼成時
の崩壊やクラックが完全に防止でき、プリフォームの精
度も向上する。また、プリフォームが薄肉の場合でも剛
性が高いため、鋳造金型へのセットや位置決めが容易で
あり、高圧で含浸される合金溶湯の圧力によりクラック
が発生することもない。さらに、従来の吸引脱水成形法
では、強化材の体積率の低いプリフォームを形成するこ
とは困難であったが、本発明においては強化材の堆積量
を自在に選択でき、低い体積率のプリフォームでも容易
に形成することができる。According to the present invention, since the preform in the present invention is maintained in shape by the porous metal body, collapse and cracks during handling, drying and firing can be completely prevented, and the precision of the preform is improved. In addition, since the rigidity is high even when the preform is thin, it can be easily set and positioned in a casting mold, and no crack is generated by the pressure of the molten alloy impregnated at high pressure. Furthermore, it was difficult to form a preform having a low volume ratio of the reinforcing material by the conventional suction dehydration molding method, but in the present invention, the amount of the reinforcing material deposited can be freely selected, and the preform having a low volume ratio can be obtained. It can be easily formed even by reforming.
【0028】また、本発明においては、金属多孔体自身
がフィルターの役割を果たすので、従来のように強化材
とフィルターの剥離が不要であるため、工程が簡素化さ
れるとともに、プリフォーム素材を損傷する恐れがない
という効果もある。Further, in the present invention, since the porous metal itself plays the role of a filter, it is not necessary to peel off the reinforcing material and the filter as in the prior art, so that the process is simplified and the preform material is reduced. There is also an effect that there is no possibility of damage.
【0029】加えて、金属多孔体と軽合金母材との間に
硬質の金属間化合物を形成するときは、複合部材の強度
や耐摩耗性等を一層改善することができる。In addition, when a hard intermetallic compound is formed between the porous metal body and the light alloy base material, the strength and wear resistance of the composite member can be further improved.
【図1】本発明の実施例における吸引脱水成形法を説明
する図(a)、及び形成された円筒状プリフォームを示
す図(b)である。FIGS. 1A and 1B are diagrams illustrating a suction dehydration molding method in an example of the present invention, and FIG. 1B illustrating a formed cylindrical preform.
【図2】本発明の実施例における高圧鋳造装置の要部断
面図である。FIG. 2 is a sectional view of a main part of a high-pressure casting apparatus according to an embodiment of the present invention.
【図3】本発明の実施例における高圧鋳造装置の要部断
面図である。FIG. 3 is a sectional view of a main part of a high-pressure casting apparatus according to an embodiment of the present invention.
【図4】本発明で使用した発泡金属の模式図である。FIG. 4 is a schematic view of a foam metal used in the present invention.
【図5】従来の吸引脱水成形法を説明する図である。FIG. 5 is a diagram illustrating a conventional suction dehydration molding method.
10 円筒状金属多孔体 11 濾紙 12a、12b 治具 13 脱水槽 14 スラリー 20 円筒状プリフォーム 21、31 上型 22、32 下型 25 スリーブ 26 ポンチ 27 Al合金溶湯 33 サイド型 DESCRIPTION OF SYMBOLS 10 Cylindrical porous metal body 11 Filter paper 12a, 12b Jig 13 Dehydration tank 14 Slurry 20 Cylindrical preform 21, 31 Upper mold 22, 32 Lower mold 25 Sleeve 26 Punch 27 Al alloy melt 33 Side mold
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI F02F 1/00 C22C 1/09 A (56)参考文献 特開 昭60−108157(JP,A) 特開 昭59−212159(JP,A) 特開 平2−97629(JP,A) 特開 平4−22558(JP,A) 特開 平1−268827(JP,A) 特開 平3−8551(JP,A) 特開 平4−22559(JP,A) 特開 平3−189063(JP,A) 特開 平1−283330(JP,A) 特開 昭60−21306(JP,A) 特開 昭61−105316(JP,A) 特開 昭61−9537(JP,A) 実開 昭61−144236(JP,U) (58)調査した分野(Int.Cl.7,DB名) B22D 19/00 B22D 17/00 B22D 18/02 C22C 1/10 C22C 47/08 F02F 1/00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI F02F 1/00 C22C 1/09 A (56) References JP-A-60-108157 (JP, A) JP-A-59-212159 ( JP, A) JP-A-2-97629 (JP, A) JP-A-4-22558 (JP, A) JP-A 1-268827 (JP, A) JP-A-3-8551 (JP, A) JP JP-A-4-22559 (JP, A) JP-A-3-18963 (JP, A) JP-A-1-283330 (JP, A) JP-A-60-21306 (JP, A) JP-A-61-105316 (JP) (A) JP-A-61-9537 (JP, A) JP-A-61-144236 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B22D 19/00 B22D 17/00 B22D 18/02 C22C 1/10 C22C 47/08 F02F 1/00
Claims (3)
含む液体中に浸漬し、金属多孔体に対し吸引作用又は加
圧作用を施すことによりその気孔内に強化材を分散さ
せ、乾燥した後、金属多孔体を成形型内に配置して金属
多孔体の気孔に軽合金溶湯を含浸することを特徴とする
軽合金製複合部材の製造方法。1. A porous metal body having continuous vents is immersed in a liquid containing a reinforcing material, and the reinforcing material is dispersed in the pores by applying a suction action or a pressurizing action to the porous metal body and dried. Thereafter, a method of manufacturing a composite member made of a light alloy, comprising disposing the porous metal body in a mold and impregnating the pores of the porous metal body with a light alloy melt.
のシリンダであり、筒状金属多孔体の内周面にフィルタ
ーを当接し、筒状金属多孔体内部から吸引作用を施し、
筒状金属多孔体の内側に強化材を高濃度に分散させるこ
とを特徴とする請求項1に記載の軽合金製複合部材の製
造方法。2. The composite member is a cylinder of an engine cylinder block, wherein a filter is brought into contact with an inner peripheral surface of the cylindrical porous metal body, and a suction action is performed from the inside of the cylindrical porous metal body.
The method for manufacturing a light alloy composite member according to claim 1, wherein the reinforcing material is dispersed at a high concentration inside the cylindrical porous metal body.
孔体と軽合金母材との間に金属間化合物を形成すること
を特徴とする請求項1又は2に記載の軽合金製複合部材
の製造方法。3. The production of a light alloy composite member according to claim 1, wherein an intermetallic compound is formed between the porous metal body and the light alloy base material by further performing a heat treatment. Method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04285282A JP3073105B2 (en) | 1992-09-29 | 1992-09-29 | Manufacturing method of light alloy composite member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04285282A JP3073105B2 (en) | 1992-09-29 | 1992-09-29 | Manufacturing method of light alloy composite member |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06106329A JPH06106329A (en) | 1994-04-19 |
JP3073105B2 true JP3073105B2 (en) | 2000-08-07 |
Family
ID=17689496
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JP04285282A Expired - Fee Related JP3073105B2 (en) | 1992-09-29 | 1992-09-29 | Manufacturing method of light alloy composite member |
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Families Citing this family (5)
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EP1135226B1 (en) * | 1998-12-03 | 2003-03-05 | Otto Junker GmbH | Composite casting and method for the production thereof |
JP2004188452A (en) | 2002-12-10 | 2004-07-08 | Nhk Spring Co Ltd | Composite member and its manufacturing method |
DE102005022741A1 (en) * | 2005-05-18 | 2006-11-23 | Fev Motorentechnik Gmbh | Cylinder crankcase for an internal combustion engine |
US8101283B2 (en) * | 2006-07-14 | 2012-01-24 | Dow Global Technologies Llc | Composite material and method of making the composite material |
KR102258154B1 (en) * | 2019-11-04 | 2021-05-28 | 한국생산기술연구원 | Die casting apparatus for forming composite, and casting method using the same |
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1992
- 1992-09-29 JP JP04285282A patent/JP3073105B2/en not_active Expired - Fee Related
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