JPH0890191A - Method for die-casting solid-liquid coexistence in spheroidal graphite cast iron - Google Patents
Method for die-casting solid-liquid coexistence in spheroidal graphite cast ironInfo
- Publication number
- JPH0890191A JPH0890191A JP6229598A JP22959894A JPH0890191A JP H0890191 A JPH0890191 A JP H0890191A JP 6229598 A JP6229598 A JP 6229598A JP 22959894 A JP22959894 A JP 22959894A JP H0890191 A JPH0890191 A JP H0890191A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- die
- solid
- spheroidal graphite
- graphite cast
- 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.)
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、球状黒鉛鋳鉄の好適
な固液共存域温度でのダイカスト法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting method for spheroidal graphite cast iron at a suitable solid-liquid coexisting region temperature.
【０００２】鋳鉄は鋳造性が良好なため複雑な形状の製
品が鋳造でき、自動車部品など広い分野で使用されてい
る。このような鋳鉄のダイカストが工業化され薄肉製品
が製造できれば製品の軽量化が実現でき極めて有意であ
る。しかし、鋳鉄は融点が高く（１１５０℃以上）、そ
の溶湯温度に耐え得る金型材料はない。Since cast iron has good castability, it can be used to cast products having complicated shapes and is used in a wide range of fields such as automobile parts. If such cast iron die castings can be industrialized and thin-walled products can be manufactured, weight reduction of the products can be realized, which is extremely significant. However, cast iron has a high melting point (1150 ° C. or higher), and there is no mold material that can withstand the molten metal temperature.
【０００３】そこで、鋳鉄の工業的なダイカストは、溶
湯より温度が低く潜熱の少ない固液共存域温度でのダイ
カストのみに可能性があり、その開発が望まれている。Therefore, there is a possibility that the industrial die-casting of cast iron is only the die-casting at a solid-liquid coexisting region temperature which is lower in temperature than the molten metal and has less latent heat, and its development is desired.
【０００４】[0004]
【従来の技術】鋳鉄のダイカストは未だ工業化されてい
ないものの、鋳鉄溶湯をダイカスト機に供給して射出す
る方法が知られている。球状黒鉛鋳鉄の溶湯をダイカス
トする場合、前記した金型の耐熱性の問題があるほか、
球状黒鉛鋳鉄は溶融状態では、黒鉛球状化剤のＣａやＭ
ｇが蒸発しやすいため、該溶湯をダイカスト機の近くに
設置する場合でもできるだけ黒鉛球状化剤の蒸発を防止
するか、あるいはそれらを溶湯に添加補充するなどの対
策をとらなければならないという問題がある。2. Description of the Related Art Although cast iron die casting has not been industrialized yet, a method of supplying molten cast iron to a die casting machine and injecting it is known. When die-casting the melt of spheroidal graphite cast iron, there is a problem of heat resistance of the mold described above,
In the molten state, spheroidal graphite cast iron is a graphite spheroidizing agent such as Ca or M.
Since g easily evaporates, even when the molten metal is installed near the die casting machine, it is necessary to prevent evaporation of the graphite spheroidizing agent as much as possible, or to take measures such as adding and supplementing them to the molten metal. is there.
【０００５】一方、前記した固液共存域温度でのダイカ
ストの場合は、レオフォーミング法とチクソフォーミン
グ法の二つの方法がある。レオフォーミング法は半凝固
金属スラリーを直接ダイカスト機に供給して射出成形す
る方法であり、チクソフォーミング法は連続鋳造ビレッ
トなどの素材を固液共存域温度に再加熱したのち、ダイ
カスト機にて射出成形する方法である。なお、チクソフ
ォーミング法の場合の再加熱は、短時間でかつ溶湯温度
より低温なので黒鉛球状化剤の蒸発はほとんどない。On the other hand, in the case of die casting at the solid-liquid coexisting region temperature, there are two methods, a rheoforming method and a thixoforming method. The rheoforming method is a method in which a semi-solidified metal slurry is directly supplied to a die casting machine for injection molding, and the thixoforming method reheats materials such as a continuously cast billet to a solid-liquid coexisting region temperature and then injects them with a die casting machine. It is a molding method. The reheating in the case of the thixoforming method is short time and lower than the temperature of the molten metal, so that the graphite spheroidizing agent is hardly evaporated.
【０００６】しかしながら、レオフォーミング法におい
ては、空気や介在物の巻き込みの問題があるほか、半凝
固金属連続製造装置と加工装置との処理能力のマッチン
グ、半凝固金属スラリーのハンドリングおよびプロセス
の制御方法等に困難な問題を抱えていて、未だ工業化す
るには至っていない。However, in the rheoforming method, there is a problem of entrainment of air and inclusions, the matching of the processing capacity between the continuous semi-solidifying metal production apparatus and the processing apparatus, the handling of the semi-solidifying metal slurry and the process control method. However, it has not yet reached industrialization.
【０００７】また、チクソフォーミング法においては、
通常の静止凝固させた球状黒鉛鋳鉄素材を用い、固液共
存域にて射出すると、デンドライトの結晶が互いに絡み
合い大きな塊となって移動するため、金型内に塊のまま
残ったり、その塊の先には液相のみが送給されて金型内
を充満することになるため、均一な組織の製品が得られ
ないという問題がある。Further, in the thixoforming method,
When a normal statically solidified spheroidal graphite cast iron material is used and injected in a solid-liquid coexistence region, the dendrite crystals move intertwined with each other to form a large lump, so that the lump remains in the mold, or Since only the liquid phase is previously fed to fill the inside of the mold, there is a problem that a product having a uniform structure cannot be obtained.
【０００８】このような製品の組織の不均一化を防止す
る手段として、粒状の初晶（亜共晶であるので初晶は
鉄）を有する鋳鉄素材を用いる方法がある。しかし、そ
の粒状組織のダイカスト用素材は、以下に列記するいず
れかの方法で得られるものの、それぞれ下記する問題点
があった。As a means for preventing such a nonuniform structure of the product, there is a method of using a cast iron material having a granular primary crystal (the primary crystal is iron because it is a hypoeutectic). However, although the material for die casting having the granular structure can be obtained by any of the methods listed below, each has the following problems.
【０００９】・ 溶湯を攪拌しながら凝固させる。 問題点：攪拌時の空気の巻き込み、拡散子の破片などの
非金属介在物の巻き込みおよび成分の変動などがある。 ・ 静止凝固させた鋳塊を塑性加工してひずみを与えて
おき、それを熱処理することで粒状化する。 問題点：鋳鉄は塑性加工能が劣るため、この方法は摘要
しにくい。 ・ 溶湯に接種剤を添加して鋳込む。 問題点：共晶セル（鉄と黒鉛との共晶からなる結晶粒）
を細かくすることはできるが、初晶粒を細かくする効果
は小さい。· Solidify the molten metal while stirring. Problems: Air entrainment during stirring, entrainment of non-metallic inclusions such as diffuser fragments, and component fluctuation. -The statically solidified ingot is subjected to plastic working to give a strain, and then it is heat treated to be granulated. Problem: This method is difficult to apply because cast iron has poor plastic workability.・ Add the inoculant to the melt and cast. Problem: Eutectic cell (grain composed of eutectic of iron and graphite)
Can be made fine, but the effect of making the primary crystal grains fine is small.
【００１０】[0010]
【発明が解決しようとする課題】したがって、この発明
は、チクソフォーミング法にて、粒状組織の鋳鉄を素材
とする場合はもちろんのこと、製造容易な通常の静止凝
固したテンドライト組織を有する鋳鉄を素材とする場合
であっても均一な組織の製品が得られる球状黒鉛鋳鉄の
固液共存域ダイカスト法を提案することを目的とする。SUMMARY OF THE INVENTION Therefore, the present invention is not limited to the case of using cast iron having a granular structure by the thixoforming method as a raw material, but also the cast iron having a usual statically solidified tendrite structure which is easy to manufacture. Even in such a case, the object is to propose a solid-liquid coexisting region die-casting method of spheroidal graphite cast iron that can obtain a product having a uniform structure.
【００１１】[0011]
【問題を解決するための手段】この発明の要旨は以下の
通りである。 球状黒鉛鋳鉄素材を固液共存域温度に加熱したの
ち、プランヂャーチップにより、該チップの加圧面積に
対し1/10以下の面積で開口するゲートを有する金型内へ
射出することを特徴とする球状黒鉛鋳鉄の固液共存域ダ
イカスト法（第１発明）である。 素材の加熱が、固液共存域の所定温度に到達したの
ち３秒間以上保持するものである第１発明に記載の球状
黒鉛鋳鉄の固液共存域ダイカスト法（第２発明）であ
る。 第１又は第２発明において、素材が、直径１００μ
m 以下の球状黒鉛の組織よりなるもの（第３発明）であ
り、さらに第１、第２又は第３発明において、素材が、
急冷凝固によるレデブライト組織を有するもの（第４発
明）である。The gist of the present invention is as follows. After heating the spheroidal graphite cast iron material to a solid-liquid coexisting region temperature, the plunger chip is injected into a mold having a gate opening at an area of 1/10 or less of the pressing area of the chip. It is a solid-liquid coexistence region die-casting method (first invention) of spheroidal graphite cast iron. The spheroidal graphite cast iron solid-liquid coexistence region die-casting method (second invention) according to the first invention, wherein the material is heated for at least 3 seconds after reaching a predetermined temperature in the solid-liquid coexistence region. In the first or second invention, the material has a diameter of 100 μ.
It is composed of a structure of spheroidal graphite of m or less (third invention), and in the first, second or third invention, the material is
It has a redeburite structure formed by rapid solidification (fourth invention).
【００１２】[0012]
【作用】この発明の作用を以下に述べる。この発明は、
球状黒鉛鋳鉄の固液共存域でのダイカストにおいて、プ
ランジャーチップの加圧面積に対して1/10以下の面積で
開口するゲートを有する金型内へ射出することを骨子と
するものである。The operation of the present invention will be described below. This invention
In die casting of spheroidal graphite cast iron in the solid-liquid coexistence region, the main idea is to inject it into a mold having a gate that opens at an area that is 1/10 or less of the pressing area of the plunger tip.
【００１３】このように、プランジャーチップの加圧面
積に対し1/10以下と狭いゲートを通過させることによ
り、素材が通常の静止凝固させたデンドライト状の初晶
を有する球状黒鉛鋳鉄であっても、デンドライトが細か
く破壊されて金型内に均等に分散し均一なミクロ組織の
ダイカスト製品が得られる。As described above, the material is the usual statically solidified spheroidal graphite cast iron having dendrite-like primary crystals by passing through a gate as narrow as 1/10 or less of the pressing area of the plunger tip. However, the dendrites are finely broken and evenly dispersed in the mold to obtain a die-cast product having a uniform microstructure.
【００１４】そして、このような素材を所定の固液共存
域温度に加熱する際、素材中の黒鉛が完全に溶解せず未
溶解部分が生じる場合がある。このような状態で射出す
るとダイカスト製品に未溶解黒鉛がそのまま混入され、
これでは均一なミクロ組織の製品を得ることはできな
い。そこでミクロ組織の均一化をはかるため、素材を加
熱する際に所定の固液共存域温度に３秒間以上保持して
黒鉛を完全に溶解することが重要である。なお、保持時
間が３秒間未満では未溶解黒鉛が残留する場合が生じ
る。When such a raw material is heated to a predetermined solid-liquid coexisting region temperature, the graphite in the raw material may not be completely dissolved and an undissolved portion may be generated. When injecting in such a state, undissolved graphite is mixed into the die cast product as it is,
With this, it is not possible to obtain a product having a uniform microstructure. Therefore, in order to make the microstructure uniform, it is important to hold the material at a predetermined solid-liquid coexistence region temperature for 3 seconds or more to completely dissolve the graphite when the material is heated. If the holding time is less than 3 seconds, undissolved graphite may remain.
【００１５】また、この発明では上記したように、通常
の静止凝固させたデンドライト組織を有する球状黒鉛鋳
鉄を素材として用いることでよいが、このような素材に
おいて、さらに素材中の黒鉛の大きさを小さくすること
が、固液共存域温度での黒鉛の溶解に極めて有効であ
る。Further, in the present invention, as described above, it is possible to use the usual spheroidal graphite cast iron having a statically solidified dendrite structure as a raw material. In such a raw material, the size of graphite in the raw material is further increased. It is extremely effective to reduce the amount of graphite dissolved in the temperature range of solid-liquid coexistence.
【００１６】すなわち、鋳造時に冷却速度を早め、球状
黒鉛の直径を１００μm 以下とした素材を用いれば、固
液共存域温度へ再加熱したときに、黒鉛の溶解が容易で
より均一な固液混相状態となり、これに伴いより均一な
ミクロ組織を有するダイカスト製品が得られるようにな
る。なお、直径が１００μm を超える粗大な球状黒鉛を
有する場合は黒鉛間隔が広くなり固液共存域温度に再加
熱したとき均一な固液混相状態になりにくい。That is, by using a material in which the cooling rate is increased at the time of casting and the diameter of the spherical graphite is 100 μm or less, the graphite is easily dissolved when reheated to the solid-liquid coexisting region temperature, and a more uniform solid-liquid mixed phase is obtained. As a result, a die-cast product having a more uniform microstructure can be obtained. In the case of having coarse spheroidal graphite having a diameter of more than 100 μm, the graphite interval becomes wide and it is difficult to form a uniform solid-liquid mixed phase when reheated to the solid-liquid coexisting region temperature.
【００１７】さらに、鋳造時に急冷凝固（例えば１℃／
秒以上）させると、その素材のミクロ組織には、レデブ
ライト組織（オーステナイトとセメンタイトの共晶）が
生成する。このレデブライト組織は固液共存域温度に再
加熱すると極めて容易に溶解し、極めて均一な固液混相
状態が得られる。Further, it is rapidly solidified during casting (eg, 1 ° C. /
If it is made more than a second), a redeburite structure (eutectic of austenite and cementite) is generated in the microstructure of the material. When this redeburite structure is reheated to a solid-liquid coexisting region temperature, it is very easily dissolved and a very uniform solid-liquid mixed phase state is obtained.
【００１８】したがって、球状黒鉛鋳鉄素材としては、
直径が１００μm 以下の黒鉛を有する素材、または急冷
凝固によりレデブライト組織を生成させた素材を用いる
ことが有利である。Therefore, as the spheroidal graphite cast iron material,
It is advantageous to use a material having graphite having a diameter of 100 μm or less, or a material in which a redeburite structure is generated by rapid solidification.
【００１９】なお、この発明においては固液共存域温度
でダイカストを行うので、溶湯のダイカストにくらべ金
型の熱負荷が軽減され、金型の寿命は大幅に延長され工
業化するにあって支障のないものとなる。In the present invention, since die casting is performed at a solid-liquid coexisting region temperature, the heat load of the die is reduced as compared with the die casting of molten metal, the life of the die is greatly extended, and there is a problem in industrialization. There will be nothing.
【００２０】[0020]
【実施例】Ｃ：3.10 mass ％、Ｓｉ：2.03mass％、Ｍ
ｎ：0.82mass％、Ｍｇ：0.038 mass％を含有する球状黒
鉛鋳鉄の静止凝固材を素材として、下記する条件で固液
共存域でのダイカストを行い、得られた製品の組織を調
査した。なお、上記には比較のため、固液共存域で攪拌
後冷却凝固させた攪拌凝固材も用いた。[Example] C: 3.10 mass%, Si: 2.03 mass%, M
Using a statically solidified material of spheroidal graphite cast iron containing n: 0.82 mass% and Mg: 0.038 mass% as a raw material, die casting was performed in the solid-liquid coexistence region under the following conditions, and the structure of the obtained product was investigated. In the above, for comparison, a stirring solidification material which was cooled and solidified after stirring in a solid-liquid coexisting region was also used.
【００２１】・ ダイカスト条件 プランジャーチップ径：６２mm 射出速度：１ｍ／ｓ 射出圧力：１２０ＭＰａ 素材温度：１１６０℃（固相率：0.3 ） 〔スリーブ内で高周波誘導加熱〕 ゲート開口面積：６０mm×ｔmm ｔ＝２mm、５mm、６mm 製品寸法：８０mm×８０mm×１０mmDie casting conditions Plunger tip diameter: 62 mm Injection speed: 1 m / s Injection pressure: 120 MPa Material temperature: 1160 ° C (solid phase ratio: 0.3) [High frequency induction heating in sleeve] Gate opening area: 60 mm x tmm t = 2mm, 5mm, 6mm Product dimensions: 80mm x 80mm x 10mm
【００２２】ここに、この実施例に用いダイカスト機の
説明図を図１に、ゲートおよび製品形状の説明図を図２
(a) 、(b) にそれぞれ示す。これらの図において、１は
プランジャーチップ、２はスリーブ、３は高周波加熱コ
イル、４は金型スリーブ、５は分流子、６はゲート、７
は金型、８はキャビティブロック、９はキャビティおよ
び１０は素材であり、さらに、１１はビスケット、１２
は湯道および１３は製品である。これらの調査結果を表
１に示す。Here, an explanatory view of the die casting machine used in this embodiment is shown in FIG. 1, and an explanatory view of the gate and the product shape is shown in FIG.
Shown in (a) and (b) respectively. In these figures, 1 is a plunger tip, 2 is a sleeve, 3 is a high-frequency heating coil, 4 is a mold sleeve, 5 is a shunt, 6 is a gate, and 7
Is a mold, 8 is a cavity block, 9 is a cavity and 10 is a material, and 11 is a biscuit and 12
Is a runner and 13 is a product. The results of these investigations are shown in Table 1.
【００２３】[0023]
【表１】 [Table 1]
【００２４】表１から明らかなように、プランジャチッ
プの加圧面積に対するゲートの開口面積が1/10以下の試
料 No.１，２および４では、いずれも均一な組織の製品
が得られているのに対し、上記値が1/8.4 の試料 No.３
では均一な組織の製品が得られていない。As is apparent from Table 1, in Sample Nos. 1, 2 and 4 in which the opening area of the gate is 1/10 or less of the pressing area of the plunger tip, products having a uniform structure are obtained. On the other hand, sample No. 3 whose value is 1 / 8.4
In, the product of uniform structure is not obtained.
【００２５】また、試料 No.４では製品に空孔欠陥があ
る。これは攪拌凝固させた素材を用いたもので、素材に
存在していた空孔欠陥がそのまま製品に持ち込まれたも
のである。Further, in sample No. 4, the product has a vacancy defect. This uses a material that is agitated and solidified, and the vacancy defects existing in the material are brought into the product as they are.
【００２６】つぎに、これらダイカスト後の製品のミク
ロ組織は初晶の鉄が粒状に分布し、その粒間の組織はダ
イカスト時に急冷されているためレデブライト組織（鉄
とセメンタイトの共晶）となっている。Next, in the microstructure of these products after die casting, primary crystal iron is distributed in a granular form, and the intergranular structure is a redeburite structure (eutectic of iron and cementite) because it is rapidly cooled during die casting. ing.
【００２７】そこで、このようなダイカスト後の製品の
レデブライト組織を黒鉛化するため熱処理を施した結
果、レデブライトは８００〜９００℃の温度に加熱する
だけで極めて短時間に黒鉛化でき、この発明に適合する
試料 No.１および２は微細黒鉛が均一に分散し空孔欠陥
のない品質の優れる製品が得られた。Therefore, as a result of heat treatment for graphitizing the redeburite structure of such a product after die casting, redeburite can be graphitized in an extremely short time only by heating to a temperature of 800 to 900 ° C. The conforming sample Nos. 1 and 2 had fine graphite uniformly dispersed therein, and products of excellent quality without void defects were obtained.
【００２８】[0028]
【発明の効果】この発明は、球状黒鉛鋳鉄素材を固液共
存域温度でダイカストするにあたり、プランジャチップ
の加圧面積に対し1/10以下の面積で開口するゲートを有
する金型内へ射出するものであって、この発明によれ
ば、普通鋳造した球状黒鉛鋳鉄素材（静止凝固材）を用
いてもミクロ組織の均一なダイカスト製品が得られ、溶
湯を用いるダイカストに比し金型の寿命も大幅に延長で
き、球状黒鉛鋳鉄のダイカストの工業化に大きく貢献で
きる。[Effects of the Invention] The present invention, when die-casting a spheroidal graphite cast iron material at a solid-liquid coexisting region temperature, it is injected into a mold having a gate opening at an area of 1/10 or less of the pressing area of the plunger tip According to the present invention, even if a normally cast spheroidal graphite cast iron material (statically solidified material) is used, a die cast product with a uniform microstructure can be obtained, and the life of the die is longer than that of die casting using a molten metal. It can be greatly extended and can greatly contribute to the industrialization of spheroidal graphite cast iron die casting.
【図１】実施例に用いたダイカスト機の説明図である。FIG. 1 is an explanatory diagram of a die casting machine used in an example.
【図２】ゲートおよび製品形状の説明図である。FIG. 2 is an explanatory diagram of a gate and a product shape.
１ プランジャーチップ ２ スリーブ ３ 高周波加熱コイル ４ 金型スリーブ ５ 分流子 ６ ゲート ７ 金型 ８ キャビティブロック ９ キャビティ 10 素材 11 ビスケット 12 湯道 13 製品 1 Plunger Chip 2 Sleeve 3 High Frequency Heating Coil 4 Mold Sleeve 5 Shunt 6 Gate 7 Mold 8 Cavity Block 9 Cavity 10 Material 11 Biscuit 12 Runway 13 Products
Claims (4)
熱したのち、プランヂャーチップにより、該チップの加
圧面積に対し1/10以下の面積で開口するゲートを有する
金型内へ射出することを特徴とする球状黒鉛鋳鉄の固液
共存域ダイカスト法。1. A spheroidal graphite cast iron material is heated to a solid-liquid coexisting region temperature and then injected into a mold having a gate that opens at an area of 1/10 or less of the pressure area of the chip by a Plunger chip. A solid-liquid coexisting region die-casting method for spheroidal graphite cast iron.
到達したのち３秒間以上保持するものである請求項１に
記載の球状黒鉛鋳鉄の固液共存域ダイカスト法。2. The solid-liquid coexistence zone die-casting method for spheroidal graphite cast iron according to claim 1, wherein the material is heated for at least 3 seconds after reaching a predetermined temperature in the solid-liquid coexistence zone.
の組織よりなる請求項１又は２に記載の球状黒鉛鋳鉄の
固液共存域ダイカスト法。3. The solid-liquid coexistence zone die-casting method for spheroidal graphite cast iron according to claim 1, wherein the material is composed of spheroidal graphite having a diameter of 100 μm or less.
織を有するものである請求項１，２又は３に記載の球状
黒鉛鋳鉄の固液共存域ダイカスト法。4. The spheroidal graphite cast iron solid-liquid coexistence region die-casting method according to claim 1, wherein the material has a ledeburite structure formed by rapid solidification.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6229598A JPH0890191A (en) | 1994-09-26 | 1994-09-26 | Method for die-casting solid-liquid coexistence in spheroidal graphite cast iron |
| US08/366,672 US5531261A (en) | 1994-01-13 | 1994-12-30 | Process for diecasting graphite cast iron at solid-liquid coexisting state |
| DE69506740T DE69506740T2 (en) | 1994-01-13 | 1995-01-06 | Process for the thixotropic die casting of graphite cast iron |
| EP95300067A EP0663251B1 (en) | 1994-01-13 | 1995-01-06 | Process for diecasting graphite cast iron at solid-liquid coexisting state |
| CA002140123A CA2140123A1 (en) | 1994-01-13 | 1995-01-12 | Process for diecasting graphite cast iron at solid-liquid coexisting state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6229598A JPH0890191A (en) | 1994-09-26 | 1994-09-26 | Method for die-casting solid-liquid coexistence in spheroidal graphite cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0890191A true JPH0890191A (en) | 1996-04-09 |
Family
ID=16894694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6229598A Pending JPH0890191A (en) | 1994-01-13 | 1994-09-26 | Method for die-casting solid-liquid coexistence in spheroidal graphite cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0890191A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100407836B1 (en) * | 2000-04-14 | 2003-12-01 | 강충길 | Manufacturing apparatus for master-cylinder of automobile and its manufacturing method |
| JP2018034202A (en) * | 2016-09-04 | 2018-03-08 | 国立大学法人東北大学 | Semi-solidified casting method of spheroidal graphite cast iron and product of semi-solidified casting |
| JP2021045795A (en) * | 2020-12-25 | 2021-03-25 | 国立大学法人東北大学 | Semi-solidified casting method of spheroidal graphite cast iron and product of semi-solidified casting |
-
1994
- 1994-09-26 JP JP6229598A patent/JPH0890191A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100407836B1 (en) * | 2000-04-14 | 2003-12-01 | 강충길 | Manufacturing apparatus for master-cylinder of automobile and its manufacturing method |
| JP2018034202A (en) * | 2016-09-04 | 2018-03-08 | 国立大学法人東北大学 | Semi-solidified casting method of spheroidal graphite cast iron and product of semi-solidified casting |
| WO2018043685A1 (en) * | 2016-09-04 | 2018-03-08 | 国立大学法人東北大学 | Spherical graphite cast iron semi-solid casting method and semi-solid cast product |
| US11920205B2 (en) | 2016-09-04 | 2024-03-05 | Tohoku University | Spherical graphite cast iron semi-solid casting method and semi-solid cast product |
| JP2021045795A (en) * | 2020-12-25 | 2021-03-25 | 国立大学法人東北大学 | Semi-solidified casting method of spheroidal graphite cast iron and product of semi-solidified casting |
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