JPH0454723B2 - - Google Patents
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- Publication number
- JPH0454723B2 JPH0454723B2 JP61004014A JP401486A JPH0454723B2 JP H0454723 B2 JPH0454723 B2 JP H0454723B2 JP 61004014 A JP61004014 A JP 61004014A JP 401486 A JP401486 A JP 401486A JP H0454723 B2 JPH0454723 B2 JP H0454723B2
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- calcium
- magnesium
- present
- molten metal
- 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 - Lifetime
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
産業上の利用分野
本発明は球状黒鉛鋳鉄及びバーミキユラー鋳鉄
を製造する際に銑鉄溶湯に加える添加剤に関し、
特には高品質を維持しつつ、その不良発生率を大
幅に下げることのできるものである。
従来の技術
一般に鋳造によつて得られる銑鉄即ち鋳鉄は少
量の炭素と、相当量のケイ素の外、マンガン、硫
黄、リンを含んでおり、前記炭素を黒鉛として含
ませることにより、破面がねずみ色のねずみ鋳
鉄、炭素を炭化鉄として含ませることにより破面
が白色の白鋳鉄、これらの混合したまだら鋳鉄等
がある。これら鋳鉄は何れも耐摩耗性が良い反
面、耐蝕性、強度が充分でなく、曲げ加工ができ
ない欠点がある。この様な欠点を改良する目的で
熱処理によつて展延性をもたせる可鍛鋳鉄とか、
鋼を配分した強靭鋳鉄、又は銅に似た特性を持つ
特殊鋳鉄が作られている。この特殊鋳鉄の一種と
して、加工特性、切削特性及び引張り特性等を改
良する目的で黒鉛を球状化又は擬球状化した鋳
鉄、通常、球状黒鉛鋳鉄及びバーミキユラー鋳鉄
と呼ばれるものがある。この球状黒鉛鋳鉄及び擬
球状黒鉛鋳鉄とは、鋳鉄溶湯をマグネシウムなど
で処理して製造され、鋳鉄内で球状又は擬球状を
呈する黒鉛として観察されることが知られてい
る。このような球状黒鉛又は擬球状黒鉛を得るた
めの球状化剤は、球状化処理後の製品歩留りを上
げる目的で、該球状化剤中にカルシウムを含有さ
せているのが通常である。従来球状化剤中に前記
カルシウムを含ませる理由は以下の通りである。
即ち鋳鉄の性能を高めるためにマグネシウムの添
加は不可欠であるが、このマグネシウムは約700
℃で溶融し、かつ、1400〜1500℃で爆発的に気化
する性質を持っている。これに対してカルシウム
は鋳鉄溶湯中に添加された際に吸熱反応を引き起
こすので、前記したマグネシウムの反応抑制剤と
しての機能を発揮することができる。更にカルシ
ウムは通常チルと呼ばれるセメンタイト（Fe3C）
の発生を防止する接種効果をも有しているため、
前記した球状化剤として用いられているものであ
る。
発明が解決しようとする問題点
しかしながら、このような従来の球状化剤によ
り処理された鋳鉄にあつては、溶湯を鋳込んで、
冷却した後の仕上工程において、鋳鉄の破断面か
らカーバイド（CaC2）の臭いが発生することが
知られており、さらに、このカーバイドの臭いが
特に強い場合には黒鉛の球状化率は良いが、不良
率が高まり、所謂引け、ピンホール等が多発する
ことが経験的に知られている。しかしながら、従
来このカーバイド臭とピンホール等の不良率との
関連については全く考察されておらず、相互に無
関係のものと考えられており、いわんや、添加剤
中のカルシウムと不良率との関連については全く
解明されておらず、カルシウムの添加と不良率と
は全く別の問題として捉えられていた。
そこで本出願人は、上記した如きカーバイドの
臭いと、鋳鉄の不良率との関連性について追及し
た結果、前記球状化剤中に含まれるカルシウムが
鋳鉄溶湯内に含まれている炭素や鋳込時に鋳型か
ら発生する炭化系ガスの炭素と結合して炭化カル
シウムCaC2（カーバイト）を生成し、この溶湯を
鋳型に鋳込んだ際に炭化カルシウムが水分や水蒸
気と反応して
CaC2＋H2O→CaO＋C2H2
となつてアセチレンガスC2H2が発生し、このア
セチレンガスC2H2がさらに熱分解されて一酸化
炭素ガス、二酸化炭素ガス及び水素ガスを発生さ
せ、これらのガスが鋳鉄内に含まれたまま冷却固
化してしまうことが前記ピンホール等の不良発生
の原因であることを突きとめたものである。
また、上記カルシウムの含有量が多量であつた
場合には、反応抑制剤として効果が一層強くなる
反面で、このカルシウムが他の球状化剤及び溶湯
中のシリコンと反応して、CaMgSiO2、CaOSiO2
等の化合物を生成し、これらの化合物が溶湯内で
スラグとなる性質がある。従つてこのようなスラ
グ取除き作業は手間を要する他、鋳鉄製品のドロ
ス欠陥、又は取鍋の寿命低下等の問題点をもたら
すことになる。さらに、上記した多量のカルシウ
ムによつて鋳鉄溶湯の表面が酸化しやすくなり、
生成した酸化被膜の影響によつて鋳型内での溶湯
の流れが悪くなつて作業性の低下や品質上の問題
を生じることがある。
そこで本発明は、上記した如き従来の球状黒鉛
化鋳鉄が有している各種問題点を解消して、カル
シウムの添加によつて発生する前記ピンホール等
の不良発生、溶湯中のスラグの発生、鋳型内での
溶湯の流れの悪化の防止、及び従来カルシウムに
よつて抑制していたマグネシウムの反応抑制の相
方を同時に実現することのできる球状黒鉛鋳鉄及
びバーミキユラー鋳鉄製造用添加剤の提供を目的
とするものである。
問題点を解決するための手段
本発明は上記の目的を達成するために、30〜70
重量％のケイ素と、２〜７重量％のマグネシウム
と、1.0〜4.0重量％の稀土類元素と、0.5〜５重量
％の炭素と、残部鉄とから成る固溶体であつて、
前記稀土類元素／マグネシウム含有量が1/4〜1/1
であるようにしている。
作 用
上記構成の本発明によれば、カルシウムを添加
していないので、得られた鋳鉄中にカーバイドが
生成されることなく、かつ、溶湯中にアセチレン
ガスが発生することがないため、ピンホール等の
不良発生率を大幅に下げることができる。また、
カルシウムに代えて添加した炭素がマグネシウム
の反応抑制剤として働き、マグネシウムと稀土類
元素の含有比率を特定値に選択したことによつ
て、カルシウムの添加と同等の接種効果をもたら
す作用がある。
実施例
以下本発明に係る球状黒鉛鋳鉄及びバーミキユ
ラー鋳鉄製造用添加剤の実施例を説明する。
マグネシウムは球状黒鉛鋳鉄に不可欠の成分で
あるが、７％より多量に含有させると蒸気が発生
して溶湯内で激しく反応し、高熱を伴つて鋳鉄の
品質に悪影響をもたらす上、酸化マグネシウムが
生成してスラグ発生の原因ともなる。しかしなが
らマグネシウムの含有率を２％より低くすると、
マグネシウムによる球状化性能がなくなつて、製
品歩留りが低下する一方、溶湯の温度が極端に低
下してスラグの発生量が多くなる。従つて本発明
にあつてはマグネシウムの含有量を２〜７重量％
の範囲に定める。
稀土類元素は溶湯中の球状化阻害元素を中和し
て球状化率を高め、かつ、効果の持続時間を延長
する性質がある。しかし１％より低いと球状化率
を高めることができず、又４％より多量では添加
過剰に基づくスラグ発生があるので本発明にあつ
ては稀土類元素の含有量を1.0〜4.0重量％の範囲
に定める。
炭素は溶湯中に微量含ませることによつて、マ
グネシウムの反応を抑制し、マグネシウムの歩留
りを向上させる効果がある上、適量加えることに
よつて基地特性を改良する作用があるので、本発
明にあつては該炭素の含有量を0.5〜５重量％の
範囲に定める。この炭素によつて従来カルシウム
の果していたマグネシウムの反応抑制を行うもの
である。
前記したマグネシウムと稀土類元素とは、その
比率によつてカルシウムと同等の接種効果をもた
らすことが判明したので、セメンタイトの発生防
止、黒鉛粒数の増加の観点から、該稀土類元素／
マグネシウム含有量が1/4〜1/1にするように定め
る。これは主として稀土類元素の脱酸力に負うも
のであつて、鋳放しの状態で接種効果を高めるこ
とができる。このマグネシウムと稀土類元素との
比率の調整によつて従来のカルシウムの果してい
た接種効果を実現するものである。
カルシウムは添加しない。このカルシウムを添
加しない点が本発明の最大の特徴である。
添加剤の主体となつて、添加剤の製造上Mgと
親和力のあるケイ素は30〜70重量％とする。
そのため、上記構成によれば、カルシウムを添
加しないため、カルシウムに起因するカーバイド
の生成、アセチレンガスの発生によるピンホール
等の不良品の発生がなく、また従来カルシウムの
果していたマグネシウムの反応抑制及びセメンタ
イトの防止等の接種効果を炭素の添加及びマグネ
シウムと稀土類元素との比率によつて果すことが
できるため、カルシウム添加と同等の品質を維持
しつつ、カルシウムの添加に起因する不良発生を
大幅に低下させることができる。
以下に表１から表８に示した本発明に係る添加
剤を使用した鋳鉄製造の具体的実施例を説明す
る。
表１から表４に示す第１実施例では、従来の添
加剤（以下従来例という）がカルシウムを1.7％
含でいるのに対し、本発明に係る添加剤（以下本
発明という）においては不可避的に含まれるもの
を合せて0.3％である。そして、本発明は従来例
の含んでいない炭素を2.14％含んでいる。かかる
添加剤を表２に示す溶湯にそれぞれ1.35％添加し
て1505℃で処理して、従来例では不良率の高い製
品に鋳込んだところ、従来例では、鋳放し不良率
が2.3％、加工後不良率が1.6％で合計3.9％の不良
率であつて、ノロカミ、ブロホールが多く見られ
たのに対し、本発明では、鋳放し不良率が0.6％、
加工後不良率が0.3％で合計0.9％と大幅に低下し
ている。さらにスラグ発生量も従来例が大である
のに対し、本発明によれば小である。一方その材
質においては、従来例も本発明も同等であり、引
張強度、伸び、硬度において従来例がそれぞれ
52.8Kg／mm2、19％、174HBであるのに対し、本発
明ではそれぞれ51.5Kg／mm2、20％、170HBと同等
の数値を示している。第５表乃至第８表に示す第
２実施例においても各表に示す通り同様の結果が
表われている。このことからも、本発明に係る添
加剤を使用すれば、従来品と同等の材質を維持し
つつ、その不良率を大幅に下げた球状黒鉛鋳鉄及
びバーミキユラー鋳鉄を得ることができる。
第１実施例
3t低周波炉にて、鋳鉄を下記表に示す成分に溶
解し、従来品と本発明品を各々取鍋内で反応せし
め、そしてかかる球状化処理溶湯を注湯して、所
定の材質及び製品不良率を検査した。
Industrial Application Field The present invention relates to additives added to molten pig iron when producing spheroidal graphite cast iron and vermicular cast iron.
In particular, it is possible to significantly reduce the defective rate while maintaining high quality. Pig iron, that is, cast iron, which is generally obtained by casting, contains a small amount of carbon and a considerable amount of silicon, as well as manganese, sulfur, and phosphorus.By incorporating the carbon in the form of graphite, the fracture surface becomes gray-colored. There are gray cast irons, white cast irons whose fractured surfaces are white due to the inclusion of carbon as iron carbide, and mottled cast irons that are a mixture of these. Although all of these cast irons have good wear resistance, they have the disadvantage that they do not have sufficient corrosion resistance or strength, and cannot be bent. In order to improve these defects, malleable cast iron, which can be made malleable through heat treatment, is used.
Strong cast iron with a proportion of steel, or special cast iron with properties similar to copper, is made. One type of this special cast iron is cast iron in which graphite is spheroidized or pseudo-spheroidized for the purpose of improving processing characteristics, cutting characteristics, tensile characteristics, etc., and is usually called spheroidal graphite cast iron or vermicular cast iron. Spheroidal graphite cast iron and pseudospheroidal graphite cast iron are manufactured by treating molten cast iron with magnesium or the like, and it is known that graphite exhibiting a spherical or pseudospherical shape is observed in the cast iron. The spheroidizing agent for obtaining such spheroidal graphite or pseudospheroidal graphite usually contains calcium in order to increase the product yield after spheroidizing treatment. The reason why the calcium is included in the conventional spheroidizing agent is as follows.
In other words, it is essential to add magnesium to improve the performance of cast iron, but this magnesium has about 700%
It has the property of melting at ℃ and explosively vaporizing at 1400 to 1500℃. On the other hand, since calcium causes an endothermic reaction when added to molten cast iron, it can function as the above-mentioned magnesium reaction inhibitor. Furthermore, calcium is usually found in cementite (Fe 3 C), which is called chill.
It also has an inoculating effect that prevents the occurrence of
It is used as the spheronizing agent mentioned above. Problems to be Solved by the Invention However, in the case of cast iron treated with such a conventional spheroidizing agent, it is difficult to cast the molten metal,
It is known that the odor of carbide (CaC 2 ) is emitted from the fractured surface of cast iron during the finishing process after cooling.Furthermore, if the odor of carbide is particularly strong, the spheroidization rate of graphite may be good, but It is known from experience that the defective rate increases and so-called shrinkage, pinholes, etc. occur frequently. However, the relationship between this carbide odor and the defective rate such as pinholes has not been considered at all, and they are considered to be unrelated to each other.In addition, the relationship between calcium in additives and the defective rate has not been considered at all. was not fully understood, and the addition of calcium and the defective rate were considered to be completely separate issues. Therefore, as a result of investigating the relationship between the above-mentioned carbide odor and the defective rate of cast iron, the present applicant found that the calcium contained in the spheroidizing agent is absorbed by the carbon contained in the molten cast iron and during casting. Calcium carbide (CaC 2 ) is produced by combining with carbon in the carbonized gas generated from the mold, and when this molten metal is poured into the mold, calcium carbide reacts with moisture and water vapor to form CaC 2 + H 2 O. →CaO + C 2 H 2 and acetylene gas C 2 H 2 is generated, and this acetylene gas C 2 H 2 is further thermally decomposed to generate carbon monoxide gas, carbon dioxide gas and hydrogen gas, and these gases It has been determined that the cause of defects such as pinholes is that the cast iron cools and solidifies while being contained in the cast iron. In addition, if the content of calcium is large, the effect as a reaction inhibitor becomes even stronger, but on the other hand, this calcium reacts with other spheroidizing agents and silicon in the molten metal, forming CaMgSiO 2 , CaOSiO 2
These compounds have the property of forming slag in the molten metal. Therefore, such a slag removal operation is not only time-consuming but also causes problems such as dross defects in cast iron products and shortened life of the ladle. Furthermore, the large amount of calcium mentioned above makes the surface of molten cast iron more likely to oxidize.
The flow of the molten metal within the mold may be affected by the generated oxide film, resulting in decreased workability and quality problems. Therefore, the present invention solves the various problems that conventional spheroidal graphitized cast iron has, as described above, and eliminates defects such as the pinholes caused by the addition of calcium, and the generation of slag in the molten metal. The purpose of the present invention is to provide an additive for the production of spheroidal graphite cast iron and vermicular cast iron that can simultaneously prevent deterioration of the flow of molten metal in the mold and suppress the reaction of magnesium, which was conventionally suppressed by calcium. It is something to do. Means for Solving the Problems In order to achieve the above objects, the present invention provides 30 to 70
A solid solution consisting of silicon by weight%, magnesium by 2-7% by weight, rare earth elements by 1.0-4.0% by weight, carbon by 0.5-5% by weight, and the balance iron,
The rare earth element/magnesium content is 1/4 to 1/1
I try to be. Effects According to the present invention having the above configuration, since calcium is not added, carbide is not generated in the obtained cast iron, and acetylene gas is not generated in the molten metal, pinholes are formed. It is possible to significantly reduce the incidence of defects such as Also,
The carbon added in place of calcium acts as a magnesium reaction inhibitor, and by selecting a specific content ratio of magnesium and rare earth elements, it has the effect of bringing about the same inoculation effect as the addition of calcium. Examples Examples of the additive for producing spheroidal graphite cast iron and vermicular cast iron according to the present invention will be described below. Magnesium is an essential component of spheroidal graphite cast iron, but if it is contained in an amount greater than 7%, steam will be generated and react violently in the molten metal, causing high heat and adversely affecting the quality of the cast iron, as well as producing magnesium oxide. It also causes slag generation. However, when the magnesium content is lower than 2%,
The spheroidizing performance of magnesium is lost, and the product yield is reduced, while the temperature of the molten metal is extremely reduced, resulting in an increase in the amount of slag generated. Therefore, in the present invention, the magnesium content is 2 to 7% by weight.
stipulated within the range of Rare earth elements have the property of neutralizing the spheroidization-inhibiting elements in the molten metal, increasing the spheroidization rate, and extending the duration of the effect. However, if it is less than 1%, the spheroidization rate cannot be increased, and if it is more than 4%, slag will be generated due to excessive addition. Define within the range. By including a small amount of carbon in the molten metal, it has the effect of suppressing the reaction of magnesium and improving the yield of magnesium, and by adding an appropriate amount, it has the effect of improving the base properties. The carbon content is usually set in the range of 0.5 to 5% by weight. This carbon suppresses the reaction of magnesium, which was previously achieved by calcium. It has been found that the above-mentioned magnesium and rare earth elements have the same inoculating effect as calcium depending on their ratio, so from the viewpoint of preventing cementite generation and increasing the number of graphite particles, the rare earth element /
Set the magnesium content to 1/4 to 1/1. This is mainly due to the deoxidizing ability of rare earth elements, and the inoculation effect can be enhanced in the as-cast state. By adjusting the ratio of magnesium and rare earth elements, the inoculating effect previously achieved by calcium can be achieved. No calcium added. The greatest feature of the present invention is that calcium is not added. Silicon, which is the main component of the additive and has an affinity for Mg in the production of the additive, should be 30 to 70% by weight. Therefore, according to the above structure, since calcium is not added, there is no generation of carbide due to calcium, no occurrence of defective products such as pinholes due to generation of acetylene gas, and there is no need to suppress the reaction of magnesium, which conventionally has been achieved with calcium, and suppress cementation. The inoculation effect, such as the prevention of can be lowered. Specific examples of cast iron production using the additives according to the present invention shown in Tables 1 to 8 will be described below. In the first example shown in Tables 1 to 4, the conventional additive (hereinafter referred to as conventional example) contains 1.7% calcium.
In contrast, in the additive according to the present invention (hereinafter referred to as the present invention), the total amount of additives that are unavoidably included is 0.3%. The present invention contains 2.14% carbon, which the conventional example does not contain. When these additives were added at 1.35% to each of the molten metals shown in Table 2, treated at 1505°C, and cast into a product that had a high defect rate in the conventional example, the as-cast defect rate was 2.3%, and the process was difficult. The post-cast defective rate was 1.6%, and the total defective rate was 3.9%, and there were many spots and blowholes, whereas in the present invention, the as-cast defective rate was 0.6%,
The defective rate after processing is 0.3%, which is a total of 0.9%, which is a significant decrease. Further, while the amount of slag generated is large in the conventional example, the amount of slag generated is small according to the present invention. On the other hand, in terms of materials, both the conventional example and the present invention are equivalent, and the conventional example has different tensile strength, elongation, and hardness.
Whereas the values are 52.8Kg/mm 2 , 19%, and 174HB, the values in the present invention are equivalent to 51.5Kg/mm 2 , 20%, and 170HB, respectively. Similar results are obtained in the second embodiment shown in Tables 5 to 8, as shown in each table. From this, by using the additive according to the present invention, it is possible to obtain spheroidal graphite cast iron and vermicular cast iron with significantly lower defect rates while maintaining the same material quality as conventional products. 1st Example In a 3t low frequency furnace, cast iron was melted into the components shown in the table below, the conventional product and the present invention product were reacted in a ladle, and the spheroidized molten metal was poured into a predetermined amount. The material and product defect rate were inspected.
【表】【table】
【表】【table】
【表】【table】
【表】
第２実施例
第１実施例に使用した溶湯を使用して、Si、
Mgの成分を変元して所定の材質及び製品不良率
を検査した。[Table] Second Example Using the molten metal used in the first example, Si,
The composition of Mg was changed and the specified material quality and product defect rate were examined.
【表】【table】
【表】【table】
【表】【table】
【表】
発明の効果
以上詳細に説明した本発明に係る球状黒鉛鋳鉄
及びバーミキユラー鋳鉄用添加剤を用いることに
より、以下に記す各種作用効果が得られる。即ち
添加剤中にカルシウムが含有されていないので、
溶湯中にカーバイドが生成されることがなくな
り、このカーバイドに起因するアセチレンガスの
発生を防止することが可能となる。従つて鋳鉄中
にピンホール、引け等のガス欠陥がなくなり、基
地の強度を高めることができて、不良率を大幅に
下げることができる。また、前記カルシウムに代
えて微量混入した炭素が、マグネシウムの反応抑
制剤としての機能を発揮する。更に稀土類元素は
球状化率を高める一方、鋳鉄の成分として不可欠
なマグネシウムとの混合比率を所定の範囲に定め
たことによつて、カルシウムと同等の接種効果が
得られるので、セメンタイトの発生を防止でき
る。又、カルシウムに起因するスラグの発生、及
び該スラグに起因するドロス欠陥等がなくなるこ
とは勿論であり、更に鋳型内での溶湯の流れが悪
化することがないので、作業性を良好に保持でき
るという効果をもたらすものである。よつて、本
発明によれば、高品質を維持しつつ、不良率を大
幅に下げることができる鋳鉄製造用添加剤を得ら
れるという大きな効果を発揮し、球状黒鉛鋳鉄及
びバーミキユラー鋳鉄製造に使用して極めて有用
である。[Table] Effects of the Invention By using the additive for spheroidal graphite cast iron and vermicular cast iron according to the present invention described in detail above, various effects described below can be obtained. In other words, since calcium is not contained in the additive,
Carbide is no longer generated in the molten metal, and it is possible to prevent the generation of acetylene gas caused by this carbide. Therefore, gas defects such as pinholes and shrinkage are eliminated in the cast iron, the strength of the base can be increased, and the defective rate can be significantly reduced. Further, a trace amount of carbon mixed in instead of the calcium functions as a magnesium reaction inhibitor. Furthermore, while rare earth elements increase the spheroidization rate, by setting the mixing ratio with magnesium, which is an essential component of cast iron, within a predetermined range, an inoculation effect equivalent to that of calcium can be obtained, thereby preventing the formation of cementite. It can be prevented. In addition, the generation of slag caused by calcium and dross defects caused by the slag are of course eliminated, and the flow of molten metal within the mold is not deteriorated, so workability can be maintained well. This brings about this effect. Therefore, according to the present invention, it is possible to obtain an additive for producing cast iron that can significantly reduce the defect rate while maintaining high quality, and can be used in the production of spheroidal graphite cast iron and vermicular cast iron. It is extremely useful.
Claims (1)
グネシウムと、1.0〜4.0重量％の稀土類元素と、
0.5〜５重量％の炭素と、残部鉄とから成る固溶
体であつて、前記稀土類元素／マグネシウム含有
量が1/4〜1/1であることを特徴とする球状黒鉛鋳
鉄及びバーミキユラー鋳鉄製造用添加剤。1 30-70% by weight of silicon, 2-7% by weight of magnesium, 1.0-4.0% by weight of rare earth elements,
A solid solution consisting of 0.5 to 5% by weight of carbon and the balance iron, for producing spheroidal graphite cast iron and vermicular cast iron, characterized in that the rare earth element/magnesium content is 1/4 to 1/1. Additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP401486A JPS62161909A (en) | 1986-01-10 | 1986-01-10 | Additives for producing spheroidal graphite cast iron and vermicular cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP401486A JPS62161909A (en) | 1986-01-10 | 1986-01-10 | Additives for producing spheroidal graphite cast iron and vermicular cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62161909A JPS62161909A (en) | 1987-07-17 |
| JPH0454723B2 true JPH0454723B2 (en) | 1992-09-01 |
Family
ID=11573113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP401486A Granted JPS62161909A (en) | 1986-01-10 | 1986-01-10 | Additives for producing spheroidal graphite cast iron and vermicular cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62161909A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2750142B1 (en) * | 1996-06-25 | 1998-08-14 | Pechiney Electrometallurgie | FERROALLIAGE FOR INOCULATION OF SPHEROIDAL GRAPHITE FOUNDS |
| FR2750143B1 (en) * | 1996-06-25 | 1998-08-14 | Pechiney Electrometallurgie | FERROALLIAGE FOR INOCULATION OF SPHEROIDAL GRAPHITE FOUNDS |
| CN103695590B (en) * | 2014-01-06 | 2015-02-25 | 山东建筑大学 | Special vermiculizer for non-magnetic vermicular graphite cast iron, and preparation technology thereof |
| CN115948633A (en) * | 2022-12-26 | 2023-04-11 | 禹州市恒利来新材料股份有限公司 | Vermicularized cored wire for green vermicular graphite cast iron and preparation method of green vermicular graphite cast iron |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE788579A (en) * | 1971-09-09 | 1973-03-08 | Int Nickel Ltd | AGENTS FOR THE PROCESSING OF FUSION IRON |
| JPS6046308A (en) * | 1983-08-24 | 1985-03-13 | Toyo Denka Kogyo Kk | Carbon-contained graphite globule-forming agent for cast iron making |
-
1986
- 1986-01-10 JP JP401486A patent/JPS62161909A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62161909A (en) | 1987-07-17 |
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