JPH02121765A - Production of ingot for rolling - Google Patents
Production of ingot for rollingInfo
- Publication number
- JPH02121765A JPH02121765A JP27086388A JP27086388A JPH02121765A JP H02121765 A JPH02121765 A JP H02121765A JP 27086388 A JP27086388 A JP 27086388A JP 27086388 A JP27086388 A JP 27086388A JP H02121765 A JPH02121765 A JP H02121765A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- pool
- mold
- ratio
- steel ingot
- 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
- 238000005096 rolling process Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 238000005204 segregation Methods 0.000 claims abstract description 13
- 238000000275 quality assurance Methods 0.000 claims abstract description 6
- 210000001787 dendrite Anatomy 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 238000010586 diagram Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 208000003351 Melanosis Diseases 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 7
- 238000007711 solidification Methods 0.000 description 6
- 230000008023 solidification Effects 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ＥＳＲ法による圧延用ロールに用いる鋼塊の
製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a steel ingot used for rolling rolls by the ESR method.
〈従来の技術〉
ＥＳＲ法による圧延用ロール鋼塊製造方法では、操業条
件すなわち電圧、ｉ流、極性、スラグ種類。<Conventional technology> In the method of manufacturing roll steel ingots for rolling using the ESR method, operating conditions, namely voltage, i-flow, polarity, and slag type.
スラグ量、インゴット寸法、フィルレシオ（＝電極径／
モールド径）、溶解速度等により、溶鋼プール形状（深
さ）をコントロールし、鋼塊の表面品質、内部品質を良
好にすることが行われている。Slag amount, ingot dimensions, fill ratio (=electrode diameter/
The shape (depth) of the molten steel pool is controlled by controlling the mold diameter), melting rate, etc., to improve the surface quality and internal quality of the steel ingot.
しかし、現状の操業法では溶鋼プール形状を内部品質面
から浅くしているため、圧延用ロール鋼塊の製造におい
ては鋼塊の表層部でのデンドライト一次アームが鋼塊表
面に対して低角度となるため、ロール製品になった時、
ロール表面にデンドライト一次アーム模様が粗く残存し
、その硬度差からデンドライト模様が被圧延材に転写さ
れるという問題がある。However, in the current operation method, the shape of the molten steel pool is made shallow in terms of internal quality, so when manufacturing roll steel ingots for rolling, the primary dendrite arms in the surface layer of the steel ingot are at a low angle to the surface of the steel ingot. Therefore, when it becomes a roll product,
There is a problem in that a rough dendrite primary arm pattern remains on the roll surface, and the dendrite pattern is transferred to the rolled material due to the difference in hardness.
第３図にＥＳＩ？法による鋼塊の凝固過程を示す。ESI in Figure 3? This figure shows the solidification process of a steel ingot using the method.
−Ｃにデンドライト成長方向は、溶鋼プール内の流動の
影響を受けなければ凝固界面に対して垂直に近い方向に
成長する。よって、溶鋼プール形状を深くすれば第３図
（ａ）に示すようにデンドライト成長方向は鋼塊表面に
対して傾角Ｑ１が大きくなり、また溶鋼プール形状を浅
（すれば第３図（ｂ）に示すようにデンドライト成長方
向は鋼塊表面に対する傾角は小さくなる。よって、デン
ドライト一次アーム傾角を鋼塊表面に対して高角度にす
るには溶鋼プール形状を深くする必要がある。-C, the dendrite growth direction is nearly perpendicular to the solidification interface unless influenced by the flow in the molten steel pool. Therefore, if the shape of the molten steel pool is made deeper, the inclination Q1 of the dendrite growth direction with respect to the steel ingot surface becomes larger as shown in Figure 3(a), and if the shape of the molten steel pool is made shallower (as shown in Figure 3(b)) As shown in , the inclination angle of the dendrite growth direction with respect to the steel ingot surface becomes small. Therefore, in order to make the dendrite primary arm inclination angle high with respect to the steel ingot surface, it is necessary to deepen the molten steel pool shape.
溶鋼プール形状を深くする操業法としては、投入電力を
高めて溶解速度を大幅に増加させ鋼塊内部の凝固を遅（
する方法がある。しかし、溶解速度の無謀な増加は鋼塊
の内部品’ｆｆ（フレソケル偏析１組織の緻密化）の悪
化につながる。このような問題を解決する方法として、
特公昭６３〜３５３４８号公報に開示された「圧延ロー
ルの製造方法」では、移動式の冷却鋳型を用い冷却鋳型
を出た後、鋼塊の表面に保温材を巻装したり誘導加熱す
ることにより、冷却鋳型下の鋼塊表面における冷却速度
を４００°Ｃ／ｈｒ以下にしてプール形状を深くしてい
る。An operating method to deepen the shape of the molten steel pool is to increase the input power to significantly increase the melting rate and slow down the solidification inside the steel ingot.
There is a way to do it. However, a reckless increase in the dissolution rate leads to deterioration of the internal parts 'ff (densification of the Fresokel segregation 1 structure) of the steel ingot. As a way to solve such problems,
In the "Method for manufacturing rolling rolls" disclosed in Japanese Patent Publication No. 63-35348, a movable cooling mold is used, and after the steel ingot leaves the cooling mold, the surface of the steel ingot is wrapped with a heat insulating material or subjected to induction heating. As a result, the cooling rate on the surface of the steel ingot under the cooling mold is set to 400°C/hr or less to make the pool shape deep.
しかし、このような方法をとるためには冷却鋳型の移動
が不可欠となり、当社固定式の鋳型では鋼塊下部表面の
冷却速度をコントロールし、緩冷却にすることは難しい
。However, in order to use this method, it is essential to move the cooling mold, and with our fixed mold, it is difficult to control the cooling rate of the lower surface of the steel ingot and achieve gradual cooling.
〈発明が解決しようとする課題〉
本発明は、従来の圧延用ロール鋼塊製造技術ではデンド
ライト一次アーム頭角が小さく、ロール表面にデンドラ
イト一次アーム模様が残るという問題に鑑み、鋳型固定
式のＥＳＲ法で、ロール有効径の内部品質を保証し、か
つ鋼塊表層部のデンドライトを鋼塊表面に対し、所望の
角度例えば４５°以上の角度で成長させた圧延用ロール
鋼塊の製造方法を提供するためになされたものである。<Problems to be Solved by the Invention> In view of the problem that in conventional rolling roll steel ingot manufacturing technology, the dendrite primary arm head angle is small and a dendrite primary arm pattern remains on the roll surface, the present invention has developed a mold-fixed ESR method. To provide a method for manufacturing a roll steel ingot for rolling, which guarantees the internal quality of the effective diameter of the roll and allows dendrites in the surface layer of the steel ingot to grow at a desired angle, for example, at an angle of 45° or more with respect to the surface of the steel ingot. It was made for the purpose of
〈課題を解決するための手段〉
本発明は、■鋳型固定式ＥＳＲ法による圧延用ロール鋼
塊製造に際して、
鋼塊表面に対する溶鋼プール傾角Ｑｒとデンドライト一
次アーム傾角Ｑ２及びモールド半径に対する溶鋼プール
深さ比との関係を示す特性図（第１図）、モールド半径
に対する溶鋼プール深さ比とモールド半径に対する鋼塊
表面からの距離の比との関係図に鋼塊におけるフレッケ
ル偏析発生領域を表示した特性図（第２図）、とによっ
て所望のデンドライト一次アーム頭角以上の傾角、フレ
ッケル偏析のないロール品質保証領域にあるモールド半
径に対する鋼塊表面からの距離の比、との両者からフレ
ンケル偏析のないような溶鋼プール１１３１角を見い出
して、その？８ｊ１２１ブール傾角となるように溶鋼を
固定式鋳型内で溶製することを特徴とするＥＳＲ法によ
る圧延用ロール鋼塊の製造方法で、■前項■において、
テン１′ライトー次アーム頭角が４５°以」二、ロール
品質保証領域がモールド半径に対する鋼塊表面からの距
離の比が２５％の場合に、溶鋼プール傾角Ｑｒが１５〜
２５°になるように溶製する圧延用ロール鋼塊の製造方
法である。<Means for Solving the Problems> The present invention provides the following features: (1) When manufacturing roll steel ingots for rolling by fixed mold ESR method, the molten steel pool inclination Qr with respect to the steel ingot surface, the dendrite primary arm inclination Q2, and the molten steel pool depth with respect to the mold radius Characteristic diagram (Figure 1) showing the relationship between the ratio and the ratio of the depth of the molten steel pool to the mold radius and the ratio of the distance from the steel ingot surface to the mold radius. (Fig. 2), the inclination angle is greater than the desired dendrite primary arm head angle, and the ratio of the distance from the steel ingot surface to the mold radius in the roll quality assurance area free of freckel segregation. Find the 1131 corner of the molten steel pool, and find out what? 8j121 A method for manufacturing a roll steel ingot for rolling by the ESR method, which is characterized by melting molten steel in a fixed mold so as to have a boule inclination angle, and in the previous item ■,
2. When the ratio of the distance from the steel ingot surface to the mold radius in the roll quality assurance area is 25%, the molten steel pool inclination Qr is 15~
This is a method for manufacturing a roll steel ingot for rolling which is melted so as to have an angle of 25°.
〈作 用〉
鋼塊直径５００ ｍｍ以上の鋼塊において、鋼塊表面に
対するプール傾角Ｑｒとデンドライト一次アーム顛角Ｑ
１及びモールド半径に対するプール）７さ比との関係を
鋳型固定式ＥＳＩ？法装置において調査し、第１図及び
第３図のような関係があるとの知見を得た。<Function> For steel ingots with a diameter of 500 mm or more, pool inclination Qr and dendrite primary arm angle Q with respect to the steel ingot surface
1 and pool to mold radius) 7) Relationship between mold fixed type ESI? We conducted an investigation using a legal device and found that there is a relationship as shown in Figures 1 and 3.
すなわち、−Ｃにデンドライト一次アーム（以下一次ア
ーム）６は熱流束の方向に成長するものであるが、溶鋼
プール４内の流動の影響によって一次アームは鋼塊軸方
向に平行になるように成長する傾向になる（第３図参照
）。That is, in -C, the dendrite primary arms (hereinafter referred to as primary arms) 6 grow in the direction of heat flux, but due to the influence of the flow in the molten steel pool 4, the primary arms grow parallel to the axial direction of the steel ingot. (See Figure 3).
またプール傾角Ｑｒとモールド半径に対するプール深さ
比との間には第１ｒＪ（＋１１に示す関係があり、プー
ル深さを深くすることによりプール１頃角Ｑ。Furthermore, there is a relationship between the pool inclination angle Qr and the ratio of the pool depth to the mold radius as shown in 1 rJ (+11), and by increasing the pool depth, the angle Q around the pool 1 is increased.
は小さくなり、モールド半径に対するプール深さ比はぼ
２．１以上ではプール傾角はほぼ１５°となりあまり変
化しない。becomes small, and when the ratio of pool depth to mold radius is approximately 2.1 or more, the pool inclination angle becomes approximately 15° and does not change much.
一方、プール傾角Ｑｒと一次アーム１頃角Ｑ１ との間
には第１図（ａ）、第１図（Ｃ）から７０≦Ｑ ｒ ＋
Ｑ ＋≦９０、又はＱＰ＋ＱＩζ９０の関係があるこ
とが判った。On the other hand, from FIGS. 1(a) and 1(C), there is a relationship between the pool inclination angle Qr and the primary arm 1 angle Q1: 70≦Q r +
It was found that there is a relationship of Q+≦90, or QP+QIζ90.
ここで一次アーム傾角Ｑ１を例えば４５°以上にするに
はプールＩＩＪＩ角Ｑｒを２５′以下にすることによっ
て目的を達成できる。In order to make the primary arm inclination angle Q1 45 degrees or more, for example, the purpose can be achieved by making the pool IIJI angle Qr 25' or less.
一方、フレッケル偏析などの内部品質はプール深さを深
くすることによって悪化し、この傾向はモールド半径が
５００ｍｍ以上になると特に顕著であるが、第２図にモ
ールド半径に対するプール深さ比とフレッケル偏析が発
生する領域の鋼塊表面からのモールド半径に対する最小
割合の関係を示した。ブリキ用ロールとしての品質保証
領域を鋼塊表面からの比を２５％とすれば、フレッケル
偏析発生領域から、モールド半径に対するプール深さ比
は２．１以下にする必要がある。よって、プール傾角Ｑ
ｒは１５°以上にする必要がある。On the other hand, internal quality such as freckel segregation deteriorates as the pool depth deepens, and this tendency is particularly noticeable when the mold radius exceeds 500 mm. The relationship between the minimum ratio of the area where this occurs to the mold radius from the steel ingot surface is shown. If the ratio of the quality assurance area as a tinplate roll from the surface of the steel ingot is 25%, the ratio of the pool depth to the mold radius from the area where freckel segregation occurs needs to be 2.1 or less. Therefore, the pool inclination Q
r needs to be 15° or more.
以上より、溶鋼プールの凝固界面角度を鋼塊表面に対し
１５〜２５°となるようなプール形状とすれば鋼塊表層
部のデンドライトを鋼塊表面に対し、４５°以上の角度
で成長させるとともにロール有効径＋７．の鋼塊表層部
の内部品質を保証できることが明らかである。From the above, if the pool shape is such that the solidification interface angle of the molten steel pool is 15 to 25 degrees to the steel ingot surface, the dendrites on the surface layer of the steel ingot will grow at an angle of 45 degrees or more to the steel ingot surface. Roll effective diameter +7. It is clear that the internal quality of the surface layer of the steel ingot can be guaranteed.
〈実施例〉
以下に本発明による具体的な実施例を示す。直径８５０
ＩＩＩ１１の冷却固定ｓｈ型を使用して、０．９重量％
（以下％と略ず）、Ｃ−５％Ｃｒ鋼をエレクトロスラグ
再溶解し、得られる鋼塊の一次アーム）噴角Ｑｒの目標
角度を５０°以上とし、またモールド半径に対する鋼塊
表面からの保証すべき肉ｊ￥比を２５％とした０以上の
仕様を満足すべき溶鋼プール傾角Ｑｒは第１図および第
２図から１５〜２１”に制御する必要がある。？８８プ
ール（噴角Ｑｒは溶解速度によって変化するが、１５〜
２１％にするための溶解速度は１０００ｋｇ／ｈｒであ
る。スラグ組成は４０％ＣａＦｔ３０％Ａｔｚｏｆｆ−
３０％ＣａＯを使用し、プール形状を６１！ Ｅ’２す
るため溶解中Ｆｅ−３を添加した。その結果、プール深
さは７５０ｍｍ、 プール頭角は２０＠ となり、一次
アームの成長方向は目標角度５０°を上回る５５°が得
られた。また、ロール有効径厚の鋼塊表層部の内部品質
も、フレッケル偏析がなく良好なものが得られた。<Examples> Specific examples according to the present invention will be shown below. Diameter 850
0.9% by weight using III11 cooling fixed sh type
(hereinafter abbreviated as %), the primary arm of the steel ingot obtained by electroslag remelting of C-5%Cr steel) The target angle of the injection angle Qr is set to be 50° or more, and the angle from the steel ingot surface to the mold radius is From Figures 1 and 2, the molten steel pool inclination Qr that satisfies the specification of 0 or more with the guaranteed meat j\ ratio of 25% needs to be controlled to 15 to 21''. Qr changes depending on the dissolution rate, but 15~
The dissolution rate to achieve 21% is 1000 kg/hr. The slag composition is 40%CaFt30%Atzoff-
Using 30% CaO, the pool shape is 61! Fe-3 was added during dissolution for E'2. As a result, the pool depth was 750 mm, the pool head angle was 20@, and the primary arm growth direction was 55°, which exceeds the target angle of 50°. In addition, the internal quality of the surface layer of the steel ingot with the roll effective diameter thickness was also good, with no freckel segregation.
〈発明の効果〉
本発明によると、モールド径５００ｍ以上の鋳型固定式
エレクトロスラグリメルテイング法で、鋼塊表層部のデ
ンドライトを鋼塊表面に対し、所望の角度例えば４５’
以上の角度で成長させることができ、かつロール有効径
Ｊ￥の鋼塊表層部の内部品質を保証できる鋼塊を得るこ
とができる。この鋼塊で製造された圧延用ロールは、被
圧延材にデンドライト模様を転写することはなく、被圧
延材の品質を従来より良好にできた。<Effects of the Invention> According to the present invention, in a mold-fixed electroslag melting method with a mold diameter of 500 m or more, dendrites in the surface layer of a steel ingot are formed at a desired angle, for example, 45' with respect to the surface of the steel ingot.
It is possible to obtain a steel ingot that can be grown at the above angle and that can guarantee the internal quality of the steel ingot surface layer with a roll effective diameter of J¥. A rolling roll manufactured from this steel ingot did not transfer the dendrite pattern to the rolled material, and the quality of the rolled material was improved compared to the conventional method.
第１図（ａ）は、プール傾角Ｑｒと一次アーム頭角Ｑｒ
との関係を示す特性図、第１図（ｂ）は、プール傾角Ｑ
ｒとモールド半径に対するプール深さ比との関係を示ず
特＋’）図、第１図（０）は、Ｑｒ、Ｑ。
深さり、半径「との関係を示す特性図、第２図は、モー
ルド半径に対するプール深さ比とモールド半径に対する
鋼塊表面からの距ｙｉＩ［の比との関係図に鋼塊におけ
るフレンゲル偏析発生領域を表示した特性図、第３図は
、溶鋼プール凝固界面と一次アーム成長方向との関係を
示す模式図である。
ｌ・・・消耗電極、 ２・・・熔融スラグ、
３・・・固定水冷鋳型、 ４・・・溶鋼プール、５
・・・水冷定盤、
６・・・デンドライト一次アーム、
７・・・溶鋼プール凝固界面、
Ｑｒ・・・ブーＪしく噴角、
Ｑｌ・・・デンドライト一次アーム頭角。Figure 1 (a) shows the pool inclination Qr and the primary arm head angle Qr.
Figure 1 (b) is a characteristic diagram showing the relationship between the pool inclination angle Q
Figure 1 (0) shows the relationship between r and pool depth ratio to mold radius. Figure 2 shows the relationship between the pool depth ratio to the mold radius and the ratio of the distance yiI from the steel ingot surface to the mold radius, showing the occurrence of Frengel segregation in the steel ingot. The characteristic diagram showing the regions, FIG. 3, is a schematic diagram showing the relationship between the molten steel pool solidification interface and the primary arm growth direction. l...consumable electrode, 2...molten slag,
3... Fixed water-cooled mold, 4... Molten steel pool, 5
...Water-cooled surface plate, 6...Dendrite primary arm, 7... Molten steel pool solidification interface, Qr...Boo J squirt angle, Ql...Dendrite primary arm head angle.
Claims (1)
際して、 鋼塊表面に対する溶鋼プール傾角（Ｑ＿ｒ）とデンドラ
イト一次アーム傾角（Ｑ＿１）及びモールド半径に対す
る溶鋼プール深さ比との関係を示す特性図（第１図）、
モールド半径に対する溶鋼プール深さ比とモールド半径
に対する鋼塊表面からの距離の比との関係図に鋼塊にお
けるフレッケル偏析発生領域を表示した特性図（第２図
）、とによって所望のデンドライト一次アーム傾角以上
の傾角、フレッケル偏析のないロール品質保証領域にあ
るモールド半径に対する鋼塊表面からの距離の比、との
両者からフレッケル偏析のないような溶鋼プール傾角を
見い出して、その溶鋼プール傾角となるように溶鋼を固
定式鋳型内で溶製することを特徴とするＥＳＲ法による
圧延用ロール鋼塊の製造方法。 ２、請求項１において、デンドライト一次アーム傾角が
４５°以上、ロール品質保証領域がモールド半径に対す
る鋼塊表面からの距離の比が２５％の場合に、溶鋼プー
ル傾角Ｑ＿ｒが１５〜２５°になるように溶製する圧延
用ロール鋼塊の製造方法。[Claims] 1. When manufacturing roll steel ingots for rolling by fixed mold ESR method, the molten steel pool inclination angle (Q_r) with respect to the steel ingot surface, the dendrite primary arm inclination angle (Q_1), and the molten steel pool depth ratio with respect to the mold radius. A characteristic diagram (Fig. 1) showing the relationship between
A characteristic diagram (Fig. 2) showing the area where freckel segregation occurs in a steel ingot is shown in the relationship between the depth ratio of the molten steel pool to the mold radius and the ratio of the distance from the steel ingot surface to the mold radius (Fig. 2). Find the molten steel pool inclination angle that does not cause freckle segregation from both the inclination angle that is greater than the inclination angle, and the ratio of the distance from the steel ingot surface to the mold radius in the roll quality assurance area without freckel segregation, and use that molten steel pool inclination angle. A method for producing a roll steel ingot for rolling using the ESR method, which is characterized by melting molten steel in a fixed mold. 2. In claim 1, when the dendrite primary arm inclination angle is 45 degrees or more and the ratio of the distance of the roll quality assurance area from the steel ingot surface to the mold radius is 25%, the molten steel pool inclination angle Q_r is 15 to 25 degrees. A method for manufacturing roll steel ingots for rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27086388A JPH02121765A (en) | 1988-10-28 | 1988-10-28 | Production of ingot for rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27086388A JPH02121765A (en) | 1988-10-28 | 1988-10-28 | Production of ingot for rolling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02121765A true JPH02121765A (en) | 1990-05-09 |
Family
ID=17492024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27086388A Pending JPH02121765A (en) | 1988-10-28 | 1988-10-28 | Production of ingot for rolling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02121765A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010090353A1 (en) * | 2009-02-09 | 2010-08-12 | 新日本製鐵株式会社 | Titanium slab for hot-rolling, and smelting method and rolling method therefor |
| JP2014043620A (en) * | 2012-08-28 | 2014-03-13 | Nippon Steel & Sumitomo Metal | METHOD OF MANUFACTURING INGOT OF Ni-BASED SUPERALLOY |
| JP6261756B1 (en) * | 2016-07-29 | 2018-01-17 | 三菱製鋼株式会社 | Heat-resistant casting |
-
1988
- 1988-10-28 JP JP27086388A patent/JPH02121765A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010090353A1 (en) * | 2009-02-09 | 2010-08-12 | 新日本製鐵株式会社 | Titanium slab for hot-rolling, and smelting method and rolling method therefor |
| KR101238144B1 (en) * | 2009-02-09 | 2013-02-28 | 도호 티타늄 가부시키가이샤 | Titanium slab for hot-rolling, and smelting method and rolling method therefor |
| JP5220115B2 (en) * | 2009-02-09 | 2013-06-26 | 新日鐵住金株式会社 | Titanium slab for hot rolling, its melting method and rolling method |
| EA020258B1 (en) * | 2009-02-09 | 2014-09-30 | Ниппон Стил Корпорейшн | Titanium slab for hot rolling, and method of producing and method of rolling the same |
| US9719154B2 (en) | 2009-02-09 | 2017-08-01 | Nippon Steel & Sumitomo Metal Corporation | Titanium slab for hot rolling, and method of producing and method of rolling the same |
| JP2014043620A (en) * | 2012-08-28 | 2014-03-13 | Nippon Steel & Sumitomo Metal | METHOD OF MANUFACTURING INGOT OF Ni-BASED SUPERALLOY |
| JP6261756B1 (en) * | 2016-07-29 | 2018-01-17 | 三菱製鋼株式会社 | Heat-resistant casting |
| WO2018020692A1 (en) * | 2016-07-29 | 2018-02-01 | 三菱製鋼株式会社 | Heat-resistant casting |
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