JPH0489155A - Manufacture of precise casting having complex part - Google Patents
Manufacture of precise casting having complex partInfo
- Publication number
- JPH0489155A JPH0489155A JP20545490A JP20545490A JPH0489155A JP H0489155 A JPH0489155 A JP H0489155A JP 20545490 A JP20545490 A JP 20545490A JP 20545490 A JP20545490 A JP 20545490A JP H0489155 A JPH0489155 A JP H0489155A
- Authority
- JP
- Japan
- Prior art keywords
- wax
- preform
- composite
- ceramic shell
- casting
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000005266 casting Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 33
- 238000005495 investment casting Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 2
- 238000005304 joining Methods 0.000 abstract 1
- 239000001993 wax Substances 0.000 description 31
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はインベストメント鋳造を基本とする複合部を有
する精密鋳造品の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing precision castings having composite parts based on investment casting.
従来、金属マトリックス複合材の精密鋳造品を得る場合
、例えば、溶解したマトリックスとなるアルミニウム合
金の溶湯中にＳｉＣ、ｌｌ ｊ！ ２０３などの強化粒
子を分散させ、インゴットを得るか、そのまま鋳型に注
いで精密鋳造品を得ていた。この方法だと製品全体が複
合材となり、湯道などもすべて複合体となる。ところで
、アルミニウム複合材の機械的特性として、例えば、Ｓ
ｉＣ強化アルミニウム合金の場合、非強化アルミニウム
合金と比較して強度、剛性などが２０％から４０％程度
上昇し、その最も優れている点は耐摩耗性である。Conventionally, when obtaining precision castings of metal matrix composite materials, for example, SiC, ll j! Reinforcing particles such as 203 were dispersed to obtain an ingot, or the product was poured directly into a mold to obtain a precision cast product. With this method, the entire product becomes a composite material, including the runners. By the way, as for the mechanical properties of aluminum composite materials, for example, S
In the case of iC-strengthened aluminum alloys, strength, rigidity, etc. are increased by about 20% to 40% compared to non-strengthened aluminum alloys, and its most excellent point is wear resistance.
ＡＳＴＭ Ｇ−６５の砂研削試験によれば、非強化のＡ
３５６−Ｔ６に比較してＳｉＣを１０％および２０％含
有した複合材の研削量は、それぞれ５６％、６１％減少
した報告がある。According to the ASTM G-65 sand grinding test, unreinforced A
It is reported that the amount of grinding of composite materials containing 10% and 20% SiC was reduced by 56% and 61%, respectively, compared to 356-T6.
前記したような長所を有する反面、４％あった伸びが０
．７％以下になるなどの短所を持っている。Although it has the advantages mentioned above, the growth rate was 0 compared to 4%.
．． It has disadvantages such as being less than 7%.
これはすなわち、靭性がなくなり割れ易くなることを意
味している。一般に、鋳造品は耐摩耗性などが必要な部
分は、その製品の一部分だけに限られ、製品全体が複合
材でできている必要はない。This means that it loses its toughness and becomes more likely to break. Generally, the parts of a cast product that require wear resistance are limited to only a portion of the product, and the entire product does not need to be made of composite material.
従来の製造方法によると、製品全体が複合材になってし
まい、製品全体に耐摩耗性はあるが、割れ易くなる欠点
があった。さらに、湯道部分などを切断する際には、こ
の部分も強化されているので、ダイアモンドや超硬チッ
プなどを使用せねばならないことが知られている。アル
ミニウムマトリックスでＳｉＣを分散させた複合材の場
合、製品が割れ易いために、振動を加えて堰を折れ断す
ることができず、超硬チップなどを刃物として使用せざ
るをえない短所がある。また湯道にはＳｉＣなどを含む
と多量のガスを含むために材料の再利用なども限られて
いた。According to conventional manufacturing methods, the entire product is made of a composite material, and although the entire product has wear resistance, it has the disadvantage of being easily broken. Furthermore, it is known that when cutting a runner, etc., a diamond or carbide tip must be used because this part is also reinforced. In the case of a composite material in which SiC is dispersed in an aluminum matrix, the product breaks easily, so it is not possible to break the weir by applying vibrations, and there is a disadvantage that carbide tips etc. must be used as cutting tools. . Furthermore, if the runner contains SiC or the like, it contains a large amount of gas, which limits the reuse of the material.
本発明の目的は、例えば耐摩耗性の必要な部分のみを複
合部とした鋳造品を得、しかも複合部の密着性の優れた
精密鋳造品の製造方法を提供することである。An object of the present invention is to provide a method for producing a precision cast product in which only the portions requiring wear resistance are composite parts, and the composite parts have excellent adhesion.
本発明は、複合部を有する精密鋳造品の製造方法におい
て、
１）強化粒子からなる所望形状のプリフォームを作製し
、前記プリフォームに蝋を含浸させる工程
（２）蝋模型を成形する工程
（３）前記蝋模型に前記蝋を含浸させたプリフォームを
接着して複合蝋模型を成形する工程（４）前記複合蝋模
型を用いて、セラミックシェルを作製する工程
（５）脱蝋後のセラミックシェルに金属溶湯を鋳込む工
程
とからなることを特徴とする複合部を有する精密鋳造品
の製造方法である。The present invention provides a method for manufacturing a precision cast product having a composite part, which includes the steps of 1) producing a preform of a desired shape made of reinforcing particles and impregnating the preform with wax; (2) molding a wax model; 3) Forming a composite wax model by bonding the preform impregnated with the wax to the wax model (4) Producing a ceramic shell using the composite wax model (5) Ceramic after dewaxing A method for manufacturing a precision casting product having a composite part, characterized by comprising a step of casting molten metal into a shell.
本発明の特徴である精密鋳造品の複合部は、鋳造部材の
うち表面の一部のみ特に強度や耐摩耗性などが要求され
る部分に用いることができる。なお、複合部は、予めＩ
Ｖａ族、Ｖａ族、Ｖｉａ族金属の炭化物、窒化物、ホウ
化物の他、ＳｉＣ、Ａ ｌ ｚＯｓなどの酸化物から適
宜選択された所望形状の多孔質体からなるプリフォーム
を用意する。さらに前記プリフォームはその後セラミッ
クシェルを作製する際スラリか多孔質体に浸透させない
ために蝋を含浸させておく。The composite part of a precision cast product, which is a feature of the present invention, can be used in a part of a cast member where only a part of the surface is particularly required to have strength and wear resistance. Note that the composite part is
A preform made of a porous body of a desired shape appropriately selected from carbides, nitrides, and borides of Va group, Va group, and Via group metals, as well as oxides such as SiC and Al zOs is prepared. Furthermore, the preform is impregnated with wax to prevent the slurry from penetrating into the porous body during subsequent fabrication of the ceramic shell.
前記蝋を含浸させたプリフォームは、鋳造品の耐摩耗性
や強度が必要な部分に相当する蝋模型の位置に接着する
。この場合、蝋模型の接着面を加熱溶融して螺接すると
便利である。なお、必要に応じてプリフォームが嵌合可
能な凹部を蝋模型に形成させ、これに前記プリフォーム
を嵌合することもできるが、嵌合の際、蝋模型の凹部を
加熱溶融して嵌合すればプリフォームの脱落を完全に防
止できる。なお、ここでいう蝋模型あるいはプリフォー
ムに含浸させる蝋とは、通常のインベストメントキャス
ティング法で用いられるワックスの他、脱蝋時に溶融可
能な樹脂、または焼成時に消失可能な樹脂を含む総称名
である。このようにして形成されたプリフォームを部分
的に接着した複合蝋模型は湯道型に組み立てた後、スラ
リに浸漬し、スタッコ材をふりかけた後乾燥する作業を
数回繰り返して通常のセラミックシェルを作製する。The preform impregnated with the wax is adhered to the wax model at a position corresponding to a part of the cast product where wear resistance and strength are required. In this case, it is convenient to heat and melt the adhesive surface of the wax model and screw it into place. Note that, if necessary, it is also possible to form a recess in the wax model into which the preform can fit, and then fit the preform therein. If they fit together, it is possible to completely prevent the preform from falling off. Note that the wax used to impregnate the wax model or preform here is a general term that includes wax used in normal investment casting methods as well as resins that can be melted during dewaxing or resins that can disappear during firing. . The composite wax model formed by partially gluing the preform formed in this way is assembled into a runner mold, then immersed in slurry, sprinkled with stucco material, and dried several times to create an ordinary ceramic shell. Create.
上記作業のうち注意すべき点は、前記蝋を含浸させたプ
リフォームがスラリと接触する表面部に蝋の皮膜が介在
すると、その後の脱蝋時にプリフォームが脱落すること
があるので、この部分の蝋皮膜はグラインダ等で削除す
るか、または他の方法で蝋皮膜を形成させない配慮が必
要である。ついで脱蝋処理を施して内部の蝋を除去する
が、この際前述の予め蝋を含浸させたプリフォームの蝋
も同時に除去され、多孔質体のプリフォームを内在した
セラミックシェルを得、これを焼成して鋳型を完成する
。このようにして得られたセラミックシェルに金属溶湯
を鋳込んだ後、型ばらし湯道の切断等の工程を経て複合
部を有する精密鋳造品が得られる。ところで、上述のプ
リフォームは多孔質体であり、鋳込みを真空鋳造、減圧
鋳造または吸引鋳造法を適用すれば金属溶湯が複合部に
十分含浸される結果、金属部と複合部との密着性が良好
となり、本製品を使用する際、複合部の欠落や剥離が生
じることがなくなる。The point to be careful about in the above work is that if there is a wax film on the surface where the wax-impregnated preform comes into contact with the slurry, the preform may fall off during subsequent dewaxing. It is necessary to remove the wax film using a grinder, etc., or use other methods to prevent the wax film from forming. Next, a dewaxing process is performed to remove the wax inside, but at this time, the wax of the preform impregnated with wax is also removed at the same time, resulting in a ceramic shell containing a porous preform, which is Complete the mold by firing. After pouring molten metal into the ceramic shell thus obtained, a precision cast product having a composite part is obtained through processes such as breaking the mold and cutting the runners. By the way, the above-mentioned preform is a porous body, and if vacuum casting, vacuum casting, or suction casting is used for casting, the molten metal will be sufficiently impregnated into the composite part, and the adhesion between the metal part and the composite part will be improved. This results in good results, and when using this product, there will be no loss or peeling of the composite part.
以下、本発明の実施例について説明する。なお、本発明
は、以下の実施例によって限定されるものではない。Examples of the present invention will be described below. Note that the present invention is not limited to the following examples.
実施例１ 本発明による複合材を得る方法は以下の手順である。Example 1 The method for obtaining the composite material according to the present invention is the following procedure.
１）体積比で５ｉＣ２０％の多孔質体プリフォームを鋳
造品の耐摩耗性が必要な部分に相当する形状のものを作
製し、予め多孔質部には蝋を含浸させた。なお、その後
の工程でスラリと接触するプリフォーム面は、グライン
ダで蝋の皮膜を除去しておいた。1) A porous preform having a volume ratio of 20% of 5iC was prepared in a shape corresponding to the part of the cast product requiring wear resistance, and the porous part was impregnated with wax in advance. Note that the wax film was removed from the preform surface that would come into contact with the slurry in the subsequent process using a grinder.
（２）鋳造品が耐摩耗性を必要とする蝋模型位置にハン
ダゴテで蝋の一部を溶融し、上記プリフォームを接着し
て複合蝋模型を形成した。(2) A part of the wax was melted with a soldering iron at the position of the wax model where the cast product required wear resistance, and the preform was adhered to form a composite wax model.
（３１＋２１で得られた複合蝋模型を湯道型に組み立て
て、蝋型を作製し、セラミックシェルを蝋型の周囲に形
成した。(The composite wax model obtained in 31+21 was assembled into a runner mold to produce a wax mold, and a ceramic shell was formed around the wax mold.
（４） （３）で得られた蝋型は、オートクレーブで
脱蝋し、１０００℃１時間の焼成を終えて、２５０℃の
鋳型温度とした。(4) The wax mold obtained in (3) was dewaxed in an autoclave and fired at 1000°C for 1 hour, resulting in a mold temperature of 250°C.
（５） （４１の鋳型にアルミニウム合金Ａ３５６−
Ｔ６を７３０“Ｃで注湯した。なお、鋳込みの際、鋳型
外部を減圧して多孔質のプリフォーム中に溶湯が十分浸
透するようにした。(5) (Aluminum alloy A356-
T6 was poured at 730"C. During casting, the pressure outside the mold was reduced so that the molten metal could sufficiently penetrate into the porous preform.
＋６１ （５）で得られた注湯した鋳型を放冷し、型
バラクの後、折れ断（湯道等を衝撃により切断）を行い
、必要とされる部分のみが複合部となった製品が得られ
た。製品は異常がなく良好であった。+61 The poured mold obtained in (5) is left to cool, and after the mold is broken, it is broken (cutting the runners, etc. by impact), and a product with only the necessary parts made of composite parts is created. Obtained. The product was in good condition with no abnormalities.
実施例２
実施例１での手順のうちプリフォームの材質が２０％Ａ
ｌ２Ｏ３以外は同じ手順で鋳型を作製し、これにアルミ
ニウム合金（Ａ３５６−７６）を注湯した。Example 2 Among the steps in Example 1, the material of the preform is 20% A.
A mold was prepared using the same procedure except for l2O3, and aluminum alloy (A356-76) was poured into it.
注湯した鋳型を放冷し、型バラクの後、堰の折れ断を行
い、必要とされる部分のみが複合材となった製品が得ら
れた。The poured mold was allowed to cool, and after the mold was broken, the weir was broken and a product was obtained in which only the necessary parts were made of composite material.
実施例３
実施例１で鋳造した際発生した湯道を再溶解し、実施例
１と同じ手順で複合部を有する精密鋳造品を得た。必要
とされる部分のみが複合材（Ａ３５６−Ｔ６２０％５ｉ
Ｃ）となった製品が得られた。Example 3 The runners generated during casting in Example 1 were remelted, and a precision cast product having a composite part was obtained in the same manner as in Example 1. Only the necessary parts are made of composite material (A356-T620%5i
A product as shown in C) was obtained.
実施例４
実施例１の手順のうちプリフォームに含浸させた蝋を熱
可塑性樹脂（ポリスチレン）５０％、パラフィン５０％
とした以外は同様な方法で精密鋳造品を得た。Example 4 In the procedure of Example 1, the wax impregnated into the preform was made of 50% thermoplastic resin (polystyrene) and 50% paraffin.
A precision cast product was obtained in the same manner except for the following.
本発明方法によれば、例えば耐摩耗性が必要とされる部
分のみを複合部とした鋳造品で、しかも使用中に複合部
の欠落がない鋳造品が得られた。According to the method of the present invention, for example, a cast product is obtained in which only the parts where wear resistance is required are composite parts, and the composite parts do not come off during use.
本発明の製造方法は、安価に製造でき、しかも湯道の再
利用が可能など生産コストを低減させる上でも有益であ
る。The manufacturing method of the present invention is advantageous in that it can be manufactured at low cost and that the runners can be reused, thereby reducing production costs.
゛ぐ゛gu
Claims (1)
化粒子からなる所望形状のプリフォームを作製し、前記
プリフォームに蝋を含浸させる工程 （２）蝋模型を成形する工程 （３）前記蝋模型に前記蝋を含浸させたプリフォームを
接着して複合蝋模型を成形する工程 （４）前記複合蝋模型を用いて、セラミックシェルを作
製する工程 （５）脱蝋後のセラミックシェルに金属溶湯を鋳込む工
程 とからなることを特徴とする複合部を有する精密鋳造品
の製造方法。[Claims] A method for manufacturing a precision cast product having a composite part, comprising: 1) producing a preform of a desired shape made of reinforcing particles, and impregnating the preform with wax; (2) molding a wax model. Step (3) Forming a composite wax model by bonding the preform impregnated with the wax to the wax model (4) Producing a ceramic shell using the composite wax model (5) After dewaxing 1. A method for manufacturing a precision casting product having a composite part, comprising the step of casting molten metal into a ceramic shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20545490A JPH0489155A (en) | 1990-08-02 | 1990-08-02 | Manufacture of precise casting having complex part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20545490A JPH0489155A (en) | 1990-08-02 | 1990-08-02 | Manufacture of precise casting having complex part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0489155A true JPH0489155A (en) | 1992-03-23 |
Family
ID=16507150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20545490A Pending JPH0489155A (en) | 1990-08-02 | 1990-08-02 | Manufacture of precise casting having complex part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0489155A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006582A1 (en) * | 1992-09-16 | 1994-03-31 | Markus Nolte | Process for producing fiber composite precision castings |
| JP2005536353A (en) * | 2002-08-20 | 2005-12-02 | エクス ワン コーポレーション | Casting process and product for carrying out the process |
-
1990
- 1990-08-02 JP JP20545490A patent/JPH0489155A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006582A1 (en) * | 1992-09-16 | 1994-03-31 | Markus Nolte | Process for producing fiber composite precision castings |
| JP2005536353A (en) * | 2002-08-20 | 2005-12-02 | エクス ワン コーポレーション | Casting process and product for carrying out the process |
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