JPH0328314A - Method for smelting titanium-containing steel - Google Patents
Method for smelting titanium-containing steelInfo
- Publication number
- JPH0328314A JPH0328314A JP15972489A JP15972489A JPH0328314A JP H0328314 A JPH0328314 A JP H0328314A JP 15972489 A JP15972489 A JP 15972489A JP 15972489 A JP15972489 A JP 15972489A JP H0328314 A JPH0328314 A JP H0328314A
- Authority
- JP
- Japan
- Prior art keywords
- content
- molten steel
- steel
- titanium
- ladle
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 54
- 239000010936 titanium Substances 0.000 title claims description 60
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 53
- 238000000034 method Methods 0.000 title abstract description 7
- 238000003723 Smelting Methods 0.000 title description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 45
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 16
- 238000007670 refining Methods 0.000 abstract description 16
- 238000010079 rubber tapping Methods 0.000 abstract description 12
- 229910052681 coesite Inorganic materials 0.000 abstract description 8
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 8
- 239000000377 silicon dioxide Substances 0.000 abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 8
- 229910052682 stishovite Inorganic materials 0.000 abstract description 8
- 229910052905 tridymite Inorganic materials 0.000 abstract description 8
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明はチタン含有鋼の溶製方法に関する．例えばＪＩ
Ｓ ＳＯＳ ３２１はチタンを含有するが、本発明でチ
タン含有鋼とは． ＳＵＳ ３２１と同程度のチタンを
含有する炭素鋼、合金鋼、ステンレス鋼をいう．［従来
の技術］
チタシは酸素や窒素と強い親和力を有する元素であるた
め、チタン含有鋼の溶製に際してチタンを溶鋼に加える
と、チタンは溶鋼中の酸素や窒素？結合してＴｉＯ■や
ＴｉＮを生成する。溶鋼の酸素含有量や窒素含有量は変
動し易いが、溶鋼の酸素含有量や窒素含有量が変動して
Ｔｉｅ，やＴｉＮの生或量が変動すると，溶鋼中に溶解
するチタンの歩留りが不安定となる。従ってチタン含有
鋼の溶製においてはチタンの歩留りが不安定になり易い
という問題点がある．
チタン含有鋼の製造においては更に、溶鋼中に生成した
Ｔｉｅ，やＴｉＮが鋳造の際に注入ノズルの内壁に付着
して、注入ノズルからの溶鋼流を絞り、極端な場合は注
入ノズルを閉塞せしめるという問題点がある．特開昭５
２−１３３８１８号と特開昭５２−１３３８２７号は、
チタン含有鋼において、溶鋼のチタン含有量とアルミニ
ウム含有量を一定の割合に制御すると、注入ノズルの閉
塞が防止できることを示している．しかし、これ等の公
報にはチタンの歩留りを安定化する手段の記載はない。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a method for producing titanium-containing steel. For example, J.I.
Although SOS 321 contains titanium, it is not defined as titanium-containing steel in the present invention. Refers to carbon steel, alloy steel, and stainless steel containing the same amount of titanium as SUS 321. [Conventional technology] Titanium is an element that has a strong affinity with oxygen and nitrogen, so when titanium is added to molten steel when making titanium-containing steel, titanium is mixed with oxygen and nitrogen in the molten steel. They combine to produce TiO■ and TiN. The oxygen content and nitrogen content of molten steel tend to fluctuate, but if the oxygen content and nitrogen content of molten steel fluctuate and the amount of Tie and TiN produced changes, the yield of titanium dissolved in molten steel will become unstable. It becomes stable. Therefore, when producing titanium-containing steel, there is a problem that the yield of titanium tends to be unstable. Furthermore, in the production of titanium-containing steel, Tie and TiN generated in the molten steel adhere to the inner wall of the injection nozzle during casting, restricting the flow of molten steel from the injection nozzle and, in extreme cases, clogging the injection nozzle. There is a problem. Japanese Patent Application Publication No. 5
No. 2-133818 and JP-A-52-133827 are
This shows that in titanium-containing steel, clogging of the injection nozzle can be prevented by controlling the titanium and aluminum contents of the molten steel at a constant ratio. However, these publications do not describe means for stabilizing the yield of titanium.
前記の如くチタンは歩留りが不安定でまたアルミニウム
も歩留りが不安定である。従ってこれ等の公報では、歩
留りが不安定で含有量が変動し易いチタンとアル？ニウ
ムとを一定の割合に制御する事となるが，安定した成果
を得るにはチタンの歩留り安定化が必要である．
［発明が解決しようとする課題］
本発明はチタン含有鋼の製造において、チタンの歩留り
を安定化させて溶鋼のＴｉ含有量を高い精度に制御する
方法を提供するものである。本発明は更に、鋳造に際し
て注入ノズルからの溶鋼流が絞ったり注入ノズルを閉塞
せしめる事がない、チタン含有鋼の溶製方法を開示する
ものである。As mentioned above, the yield of titanium is unstable, and the yield of aluminum is also unstable. Therefore, in these publications, titanium and aluminum, whose yields are unstable and whose contents tend to fluctuate, are discussed. In order to obtain stable results, it is necessary to stabilize the yield of titanium. [Problems to be Solved by the Invention] The present invention provides a method for stabilizing the yield of titanium and controlling the Ti content of molten steel with high precision in the production of titanium-containing steel. The present invention further discloses a method of melting titanium-containing steel in which the flow of molten steel from the injection nozzle does not choke or block the injection nozzle during casting.
［課題を解決するための手段コ
本発明においては、チタン含有溶鋼を取鍋に出鋼する際
に、出滓された取鍋内スラグのＳｉＯ，の含有量が３％
以下となるように制御する．本発明で精錬炉とはＡＯＤ
炉あるいはＡＯＤ炉の以下に述べる機能を有する仕上げ
精錬炉をいうが、このスラグのＳｉＯ■含有量の制御に
よって、取鍋内溶鋼のチタン含有量を高い精度で所望の
含有量に制御する事ができる．本発明者の知見によると
、格別の工夫を行わないと，出鋼に際して精錬炉内？ら
取鍋内に至る間で溶鋼中のチタンは酸化し減少して、取
鍋内の溶鋼のチタン含有量が予測を超えて低くなる事が
多い。[Means for solving the problem] In the present invention, when titanium-containing molten steel is tapped into a ladle, the content of SiO in the slag in the ladle is 3%.
Control so that the following happens. In the present invention, the refining furnace is AOD
This refers to a finish refining furnace that has the following functions of a furnace or AOD furnace, and by controlling the SiO content of this slag, it is possible to control the titanium content of the molten steel in the ladle to the desired content with high precision. can. According to the findings of the present inventor, unless special measures are taken, it will not be possible to tap the steel inside the smelting furnace. The titanium in the molten steel oxidizes and decreases between the process from the steel to the ladle, and the titanium content of the molten steel in the ladle often becomes lower than expected.
第２図は本発明者が調査した結果で，出鋼滓のＳｉＯ，
含有量と出鋼に際しての溶鋼のチタン含有量の減少量の
関係を示す図である。第２図にみられる如く、出鋼滓の
ＳｉＯ２含有量が３％を越える場合は出鋼に際してのチ
タン減少量ΔＴｉの変動が大きく出鋼後の溶鋼のチタン
含有量を予測する事が困難である。出鋼滓のＳｉＯ■含
有量を３％以下に制御するとチタン減少量ΔＴｉは常に
小さく、取鍋内の溶鋼のチタン含有量が予測を超えて低
くなる事がない。従って、出鋼前の精錬炉内の溶鋼のＴ
ｉ含有量を管理することにより、取鍋内溶鋼のチタン含
有量を高い精度で所望の含有量に制御する事ができる．
出鋼滓のＳｉＯ■含有量を３％以下に制御するために、
本発明者は下記（１）〜（４）を併用した。Figure 2 shows the results of the inventor's investigation, showing that SiO in the tapping slag,
It is a figure which shows the relationship between titanium content and the amount of decrease in titanium content of molten steel upon tapping. As shown in Figure 2, when the SiO2 content of the tapped slag exceeds 3%, the titanium reduction amount ΔTi during tapping varies greatly, making it difficult to predict the titanium content of the molten steel after tapping. be. When the SiO2 content of the tapped steel slag is controlled to 3% or less, the amount of titanium reduction ΔTi is always small, and the titanium content of the molten steel in the ladle does not become lower than expected. Therefore, T of molten steel in the refining furnace before tapping
By controlling the i content, the titanium content of the molten steel in the ladle can be controlled to the desired content with high precision. In order to control the SiO content of the tapped steel slag to 3% or less,
The present inventor used the following (1) to (4) in combination.
（１）．本発明者はチタン含有鋼の溶製に先立って、精
錬炉の内壁および取鍋に付着してぃるＳｉＯ２含有？の
高いスラグを予め除去した。この除去は、アルミニウム
を用いて還元した鋼種を前回のチャージとして溶製，出
鋼する事によって行った．精錬炉や取鍋に付着していた
Ｓｕｎ，含有量の高いスラグはこの前回のチャージのス
ラグ中のＡＱ．Ｏ，にょって低融点スラグを形成して除
去された。(1). Prior to the melting of titanium-containing steel, the present inventor discovered that SiO2-containing particles adhered to the inner walls and ladle of a refining furnace. The high slag was removed in advance. This removal was carried out by melting and tapping steel that had been reduced using aluminum as the previous charge. The slag with a high Sun and high content that adhered to the smelting furnace and ladle is the AQ in the slag from the previous charge. O, formed a low melting point slag and was removed.
（２）．本発明者はチタン含有鋼の溶製に際しては、精
錬炉に装入する粗溶鋼のＳｉ含有量を０．３％以下とし
た。粗溶鋼のＳｉ含有量は例えば粗溶鋼を得るための電
炉で溶鋼のＳＬを調整する事によって達或できた。(2). When melting titanium-containing steel, the inventor set the Si content of crude molten steel charged to a refining furnace to be 0.3% or less. The Si content of the crude molten steel can be achieved, for example, by adjusting the SL of the molten steel in an electric furnace for obtaining the crude molten steel.
（３）．精錬炉内に加える造滓剤は、ＳｉＯ，の含有量
を控えたものを選んで使用した。(3). The slag-forming agent added to the smelting furnace was selected to have a low content of SiO.
（４）．精錬炉内の溶鋼の還元には，主としてＡｆｆを
用いた．
以上の手段によって、出鋼滓のＳｉＯ，含有量を３％以
下に容易に制御する事ができた。(4). Aff was mainly used to reduce the molten steel in the refining furnace. By the above means, it was possible to easily control the SiO content of the tapping slag to 3% or less.
本発明では、以上述べた如く精錬炉からの出鋼滓のＳｉ
Ｏ■を３％以下に制御して、取鍋内溶鋼のＴｉ含有量を
高い精度で制御するが、更に取鍋内溶鋼の窒素含有量［
Ｎ ］ （ｐｐｍ）とチタン含有量［Ｔｉ］（％）を
（１）式の範囲に制御する。In the present invention, as described above, Si of the tapping slag from the smelting furnace is
The Ti content of the molten steel in the ladle is controlled with high precision by controlling O to 3% or less, but the nitrogen content of the molten steel in the ladle [
N ] (ppm) and the titanium content [Ti] (%) are controlled within the range of formula (1).
７ Ｑｏｇ［Ｎ］＋６ｎｏｇ［Ｔｉコ≦１１．５・−−
−・・（１）この窒素含有量とチタン含有量の制御によ
って、取鍋内溶鋼を鋳造する際に、取鍋ノズルや連続鋳
造におけるタンディッシュノズルからの溶鋼流が絞られ
、あるいはこれ等のノズルが閉塞する（以下はノズル閉
塞等と略記する）事が防止できる。7 Qog[N]+6nog[Tiko≦11.5・--
- (1) By controlling the nitrogen content and titanium content, when casting the molten steel in the ladle, the molten steel flow from the ladle nozzle or the tundish nozzle in continuous casting is restricted or It is possible to prevent the nozzle from clogging (hereinafter abbreviated as nozzle clogging, etc.).
第１図は本発明者が調査した結果で、取鍋内溶鋼の窒素
含有量およびチタン含有量とノズル閉塞等の関係を示す
図である。第１図にみられる如く、直線７Ｑｏｇ［Ｎコ
＋６Ｑｏｇ［Ｔｉｌ＝１１．５より右上の窒素含有量が
高い範囲ではノズル閉塞等が頻発するが、窒素含有量と
チタン含有量を（１）式の範囲に制御すると、ノズル閉
塞等の発生がない。窒素含有量とチタン含有量をこのよ
うに制御するとノズル閉塞等が防止できる理由は、出鋼
滓のＳｉＯ２含有量を３％以下に制御したチタン含有溶
鋼で“は、ノズル閉塞等の発生は主としてＴｉＮの形成
に依存するためであると考えられる。FIG. 1 is a diagram showing the relationship between the nitrogen content and titanium content of molten steel in the ladle and nozzle clogging, etc., which is the result of an investigation by the present inventor. As shown in Figure 1, nozzle clogging occurs frequently in the range where the nitrogen content is high in the upper right corner of the straight line 7Qog [N + 6Qog [Til = 11.5]. When controlled within this range, nozzle clogging, etc. will not occur. The reason why nozzle clogging can be prevented by controlling the nitrogen content and titanium content in this way is that with titanium-containing molten steel in which the SiO2 content of the tapped slag is controlled to 3% or less, the occurrence of nozzle clogging mainly occurs. This is thought to be because it depends on the formation of TiN.
通常のステンレス鋼、例えばＪＩＳ ＳＩＪＳ ３０４
やＳＵＳ３２１の溶鋼は窒素の溶解度が高いので，溶製
に際して格別の工夫を行わないと、取鍋内溶鋼の窒素含
有量が２００ｐｐｍ以上となる。Ordinary stainless steel, e.g. JIS SIJS 304
Molten steel such as SUS321 and SUS321 has a high solubility of nitrogen, so unless special measures are taken during melting, the nitrogen content of the molten steel in the ladle will be 200 ppm or more.
そこで本発明者は下記（１）， （２） ，を併用して
取鍋内溶鋼の窒素含有量を（１）式の範囲すなわち第ｌ
図の直線の左下のＩｉｌ！囲に制御した。Therefore, the present inventor combined the following (1) and (2) to calculate the nitrogen content of molten steel in the ladle within the range of equation (1), that is, the lth
Iil at the bottom left of the straight line in the figure! controlled within the surroundings.
（１）．本発明者はチタン含有鋼の溶製に際しては、炭
素含有量が通常よりも高い、２．０％以上の粗溶鋼を精
錬炉に装入し、精錬炉内で脱炭反応を十分に行った。こ
の十分な脱炭反応で多量のＣＯガスが発生するが、粗溶
鋼の含有窒素は活発なＣＯガスの発生によって溶鋼から
除去されて，窒素含有量が低い溶鋼が得られた。(1). When melting titanium-containing steel, the inventor charged crude molten steel with a carbon content of 2.0% or more, which is higher than usual, into a refining furnace, and carried out a sufficient decarburization reaction in the refining furnace. . Although a large amount of CO gas was generated by this sufficient decarburization reaction, the nitrogen contained in the crude molten steel was removed from the molten steel by the active generation of CO gas, and molten steel with a low nitrogen content was obtained.
（２）．本発明者は更に，チタン含有溶鋼を受鋼する取
鍋内をアルゴンガスで充満させ、アルゴンガスを満たし
た取鍋ヘチタン含有溶鋼を出鋼した。(2). The inventor further filled a ladle for receiving titanium-containing molten steel with argon gas, and tapped the titanium-containing molten steel from the ladle filled with argon gas.
大気の雰囲気でチタン含有溶鋼を出鋼すると、チタン含
有溶鋼は出鋼中に窒素ガスを吸収するため、取鍋内溶鋼
の窒素含有量は精錬炉内の溶鋼の窒素゛含有量よりも，
例えば２５ｐｐｍ高くなる。取鍋内をアルゴンガスで充
満させる事によって、出鋼に際しての窒素含有量の上昇
を約１０ｐｐｍに押える事ができる。取鍋内をアルゴン
ガスで充満する方法は、例えば実開昭６１−１３３５４
１号に記載の方法即ち、アルミ箔で取鍋の上縁を覆い内
部にアルゴンガスを吹き込む事によって達成する事がで
きる。When titanium-containing molten steel is tapped in the atmosphere, the titanium-containing molten steel absorbs nitrogen gas during tapping, so the nitrogen content of the molten steel in the ladle is higher than the nitrogen content of the molten steel in the refining furnace.
For example, it increases by 25 ppm. By filling the ladle with argon gas, the increase in nitrogen content during tapping can be suppressed to about 10 ppm. A method of filling the inside of the ladle with argon gas is described, for example, in Utility Model Application Publication No. 13354/1986.
This can be achieved by the method described in No. 1, that is, by covering the upper edge of the ladle with aluminum foil and blowing argon gas into the inside.
以上の手段によって、取鍋内溶鋼の窒素含有量は第１図
の直線の左下の範囲に下げることができる．既に述べた
如く、本発明では取鍋内溶鋼のＴｉ含有量は高い精度で
制御できるため、取鍋内溶鋼の窒素含有量とチタン含有
量を（１）式の範囲に容易に制御する事ができる。By the above measures, the nitrogen content of the molten steel in the ladle can be lowered to the lower left range of the straight line in Figure 1. As already mentioned, in the present invention, the Ti content of the molten steel in the ladle can be controlled with high precision, so the nitrogen content and titanium content of the molten steel in the ladle can be easily controlled within the range of equation (1). can.
なお、本発明の対象鋼のチタン含有量は、（１）におい
て［Ｎコ（２００ｐｐｍとなる０．１７％以上とし、上
限は０．５％程度とするのが望ましい。In addition, the titanium content of the target steel of the present invention is preferably 0.17% or more, which is 200 ppm in (1), and the upper limit is preferably about 0.5%.
［実施例］
ＳＯＳ ３２１を容量６０トンの電気炉で溶解しＡＯＤ
によって精錬して溶製し、連続鋳造機によって、内径が
５０開φの取鍋スライディングノズルと、内径が３０ｍ
■φのタンディッシュノズルを用いて、ｌ７０ｍｍφの
丸ブルームに鋳造した。[Example] AOD by melting SOS 321 in an electric furnace with a capacity of 60 tons
It is refined and melted by a continuous casting machine, and a ladle sliding nozzle with an inner diameter of 50 mm and an inner diameter of 30 m are produced.
■ Using a φ tundish nozzle, it was cast into a round bloom of 170 mmφ.
精錬および鋳造の概要を第１表に示した。第１表で比較
例のＮｏ．４． ５， ６，はチタン歩留りの変動が大
きく、またタンディッシュノズル閉塞等が発生したが、
本発明例のＮｏ．１． ２． ３はチタン歩留りが高く
かつ安定しており、タンディッシュノズル閉塞等が発生
しなかった６
量を高い精度で制御する事ができる．また本発明による
とノズル閉塞等が防止できて鋳造事故が減少し、また連
々鋳操業を安定して行う事ができる。A summary of the smelting and casting is shown in Table 1. In Table 1, Comparative Example No. 4. In Nos. 5 and 6, the titanium yield fluctuated greatly and tundish nozzle blockage occurred, but
No. of the present invention example. 1. 2. 3 has a high and stable titanium yield, and no tundish nozzle clogging occurred.6 The amount can be controlled with high precision. Further, according to the present invention, nozzle clogging can be prevented, casting accidents can be reduced, and casting operations can be carried out stably.
第１図は取鍋内溶鋼の窒素含有量およびチタン含有量と
ノズル閉塞等との関係を示す図、第２図は出鋼滓のＳｉ
Ｏ，含有量と出鋼中の溶鋼のＴｉ含有量の減少量との関
係を示す図、である．Figure 1 is a diagram showing the relationship between the nitrogen content and titanium content of molten steel in the ladle and nozzle clogging, etc. Figure 2 is a diagram showing the relationship between the nitrogen content and titanium content of molten steel in the ladle and nozzle clogging, etc.
2 is a diagram showing the relationship between the O content and the amount of decrease in the Ti content of molten steel during tapping.
Claims (1)
ｉＯ＿２含有量を３％以下とし、かつ取鍋内溶鋼の窒素
含有量［Ｎ］（ｐｐｍ）とチタン含有量［Ｔｉ］（％）
を（１）式の範囲に制御することを特徴とする、チタン
含有鋼の溶製方法 ７ｌｏｇ［Ｎ］＋６ｌｏｇ［Ｔｉ］≦１１．５……（１
）[Claims] In the production of titanium-containing steel, the S
The iO_2 content is 3% or less, and the nitrogen content [N] (ppm) and titanium content [Ti] (%) of the molten steel in the ladle.
7log[N]+6log[Ti]≦11.5...(1
)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15972489A JPH0651884B2 (en) | 1989-06-23 | 1989-06-23 | Method for melting titanium-containing steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15972489A JPH0651884B2 (en) | 1989-06-23 | 1989-06-23 | Method for melting titanium-containing steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0328314A true JPH0328314A (en) | 1991-02-06 |
| JPH0651884B2 JPH0651884B2 (en) | 1994-07-06 |
Family
ID=15699895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15972489A Expired - Lifetime JPH0651884B2 (en) | 1989-06-23 | 1989-06-23 | Method for melting titanium-containing steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0651884B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007056372A (en) * | 2006-10-30 | 2007-03-08 | Nippon Yakin Kogyo Co Ltd | Ti-CONTAINING Fe-Cr-Ni STEEL EXCELLENT IN SURFACE PROPERTY AND ITS CASTING METHOD |
| KR100743367B1 (en) * | 2001-07-04 | 2007-07-26 | 주식회사 포스코 | Method of refining low nitrogen, low carbon stainless steel sheets having stabilized titanium |
| CN114351034A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
-
1989
- 1989-06-23 JP JP15972489A patent/JPH0651884B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100743367B1 (en) * | 2001-07-04 | 2007-07-26 | 주식회사 포스코 | Method of refining low nitrogen, low carbon stainless steel sheets having stabilized titanium |
| JP2007056372A (en) * | 2006-10-30 | 2007-03-08 | Nippon Yakin Kogyo Co Ltd | Ti-CONTAINING Fe-Cr-Ni STEEL EXCELLENT IN SURFACE PROPERTY AND ITS CASTING METHOD |
| JP4542079B2 (en) * | 2006-10-30 | 2010-09-08 | 日本冶金工業株式会社 | Casting method of Ti-containing Fe-Cr-Ni steel with excellent surface properties |
| CN114351034A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
| CN114351034B (en) * | 2022-01-07 | 2022-08-16 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0651884B2 (en) | 1994-07-06 |
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