JP2000212635A - Melting of high carbon steel for wire rod - Google Patents
Melting of high carbon steel for wire rodInfo
- Publication number
- JP2000212635A JP2000212635A JP11016676A JP1667699A JP2000212635A JP 2000212635 A JP2000212635 A JP 2000212635A JP 11016676 A JP11016676 A JP 11016676A JP 1667699 A JP1667699 A JP 1667699A JP 2000212635 A JP2000212635 A JP 2000212635A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- rem
- carbon steel
- high carbon
- wire rod
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、線材用高炭素鋼の
溶製方法に関する。The present invention relates to a method for producing high carbon steel for wire rods.
【０００２】[0002]
【従来の技術】例えば、自動車用タイヤ・コードに使用
される高炭素鋼線材は、高炭素鋼からなる素材（通常、
鋳片）を直径約５．５ｍｍまで熱間圧延し、その後パテ
ンティング（熱処理の１種）を施しながら、数回にわた
って冷間で引き抜き加工（伸線加工）し、最終的に直径
０．１５ｍｍ程度の極細線にされる。この伸線加工に際
して、素材中に硬質な粒状の非金属介在物が存在してい
ると、該素材の基地（マトリックスともいう）が伸延さ
れても、非金属介在物は伸延しない。この状態では、該
介在物の周辺に微小な空隙（ボイドという）が形成され
るので、素材の延性が低下して断線が生じ易くなる。特
に、近年は、タイヤ・コードの極細線化及び高強度化が
志向されるので、素材中の介在物の無害化要求が強まっ
ている。2. Description of the Related Art For example, high-carbon steel wires used for automobile tire cords are made of a material made of high-carbon steel (usually,
The slab) is hot-rolled to a diameter of about 5.5 mm, and then subjected to cold drawing (drawing) several times while being subjected to patenting (one type of heat treatment). It is made into a very fine line. In the wire drawing, if hard granular non-metallic inclusions are present in the material, the non-metallic inclusions do not extend even if the matrix (also referred to as a matrix) of the material is extended. In this state, minute voids (referred to as voids) are formed around the inclusions, so that the ductility of the material is reduced and disconnection easily occurs. In particular, in recent years, there has been an increasing demand for ultrafine wires and high strength tire cords, and there is an increasing demand for harmless inclusions in the material.
【０００３】そこで、従来より、素材中に存在する非金
属介在物が素材の圧延時に十分延伸するように、それを
軟質なものにする技術開発が盛んに行なわれてきた。そ
の結果、多くの技術が提案され、実用されるようになっ
た。それらの技術のうちでも、特に、製鋼段階で溶鋼に
希土類元素を添加し、介在物を軟質にする方法が注目さ
れている。[0003] Conventionally, technology has been actively developed to soften nonmetallic inclusions present in a material so that the material is sufficiently stretched during rolling of the material. As a result, many technologies have been proposed and put to practical use. Among those techniques, a method of adding a rare earth element to molten steel in a steelmaking stage to soften inclusions has attracted particular attention.
【０００４】例えば、特公昭５７−３５２４３号公報
は、Ａｌで脱酸せずに出鋼した溶鋼を取鍋に移し、そこ
にキャリア・ガスと共にＣａＯ含有フラックスを吹き込
んで予備脱酸し、その後Ｃａ，Ｍｇ，希土類元素（以
下、ＲＥＭという）の一種又は二種以上を含む合金を微
量吹き込み、素材を溶製する方法を提案している。[0004] For example, Japanese Patent Publication No. 57-35243 discloses a method in which molten steel which has been tapped without being deoxidized with Al is transferred to a ladle, and a CaO-containing flux is blown into the ladle together with a carrier gas to perform preliminary deoxidation. , Mg, and a rare earth element (hereinafter referred to as REM) are proposed.
【０００５】また、特開平１０−１８３２２９号公報
は、重量比にてＣを０．５０〜１．００％含む高炭素鋼
線材の製造方法において、転炉あるいは電気炉での脱
Ｃ，脱Ｐ処理後に行なう取鍋内二次精錬に際し、スラグ
中のＣａＯ／ＳｉＯ2を１．０〜１．５に調整し、攪拌
処理を行ないスラグ−メタル反応を進行させて溶鋼中の
Ｏ濃度を２０ｐｐｍ以下にした後、Ａｌ−ＲＥＭ含有Ｆ
ｅ合金を添加して精錬後の溶鋼中のＡｌ濃度を３．０ｐ
ｐｍ以下、溶存ＲＥＭ濃度を１．５〜５．０ｐｐｍと
し、さらにＮ濃度を４０ｐｐｍ未満にし、その後連続鋳
造し、熱間圧延する方法を提案している。これらの方法
によって得た素材は、圧延で従来より良く延伸され、あ
る程度の非金属介在物の軟質化が達成された。Japanese Unexamined Patent Publication No. Hei 10-183229 discloses a method for producing a high carbon steel wire rod containing 0.50 to 1.00% of C in a weight ratio. During the secondary refining in the ladle performed after the treatment, the CaO / SiO 2 in the slag is adjusted to 1.0 to 1.5, and the slag-metal reaction is performed by performing the stirring treatment to reduce the O concentration in the molten steel to 20 ppm or less. And then the Al-REM containing F
e alloy was added to reduce the Al concentration in the molten steel after refining to 3.0 p.
pm or less, the dissolved REM concentration is set to 1.5 to 5.0 ppm, the N concentration is set to less than 40 ppm, and then continuous casting and hot rolling are proposed. The raw materials obtained by these methods were stretched better by rolling than before, and a certain degree of softening of nonmetallic inclusions was achieved.
【０００６】しかしながら、これらの方法で得た素材で
も、線材にした際に断線が完全に生じないわけではな
く、まだ改良の余地が残されていると思われる。[0006] However, even with the materials obtained by these methods, breakage does not necessarily occur completely when the wire is formed, and it seems that there is still room for improvement.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、かかる事情
に鑑み、従来より断線頻度が格段と低い素材を得ること
の可能な線材用高炭素鋼の溶製方法を提供することを目
的としている。SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a method for producing a high-carbon steel for a wire rod capable of obtaining a material whose disconnection frequency is much lower than in the past. .
【０００８】[0008]
【課題を解決するための手段】発明者は、上記目的を達
成するため、上記した従来の製造方法で得た素材中の非
金属介在物の形態を調査し、その成果を本発明に具現化
した。In order to achieve the above object, the inventor investigated the form of nonmetallic inclusions in a material obtained by the above-mentioned conventional manufacturing method, and embodied the results in the present invention. did.
【０００９】すなわち、本発明は、 Ｃ：０．５〜１．０ｗｔ％、 Ｓｉ：０．１５〜０．５０ｗｔ％、 Ｍｎ：０．３０〜０．９０ｗｔ％、 Ｐ：＜０．０２０ｗｔ％、 Ｓ：＜０．０２０ｗｔ％、 で残部鉄、及び不可避的不純物からなる高炭素溶鋼を取
鍋に入れ、ＣａＯ／ＳｉＯ2を１．０〜１．５に調整し
たスラグと共に撹拌してスラグ−メタル反応を進行させ
て二次精錬する線材用高炭素鋼の溶製方法において、前
記スラグ中に、ＲＥＭ含有鉄合金を添加し、攪拌処理す
ることを特徴とする線材用高炭素鋼の溶製方法である。That is, the present invention provides: C: 0.5 to 1.0 wt%, Si: 0.15 to 0.50 wt%, Mn: 0.30 to 0.90 wt%, P: <0.020 wt%, S: <0.020 wt%, in the balance iron, and high carbon molten steel placed in a ladle inevitable impurities, stirring to slag with slag to adjust the CaO / SiO 2 1.0-1.5 - metal A method for producing a high-carbon steel for wire rods, in which a reaction is advanced to perform secondary refining, wherein a REM-containing iron alloy is added to the slag, followed by stirring. It is.
【００１０】また、本発明は、前記スラグ中へのＲＥＭ
含有鉄合金の添加を、キャリア・ガスによる吹き込みで
行なったり、あるいはスラグ上へ投入で行なうことを特
徴とする線材用高炭素鋼の溶製方法である。[0010] Further, the present invention provides a method for producing a slag by using REM.
This is a method for melting high carbon steel for wire rods, wherein the addition of the contained iron alloy is performed by blowing with a carrier gas or by charging onto a slag.
【００１１】さらに、本発明は、前記ＲＥＭ含有鉄合金
が吹き込まれたスラグに電極を挿入し、再加熱すること
を特徴とする線材用高炭素鋼の溶製方法である。Further, the present invention is a method for melting high carbon steel for a wire rod, wherein an electrode is inserted into a slag into which the REM-containing iron alloy has been blown, and reheated.
【００１２】加えて、本発明は、前記溶鋼中の溶存酸素
濃度を２０ｐｐｍ以下とすることを特徴とする線材用高
炭素鋼の溶製方法でもある。In addition, the present invention is also a method for producing high-carbon steel for wire rods, wherein the concentration of dissolved oxygen in the molten steel is set to 20 ppm or less.
【００１３】本発明では、予め鋼中に形成された非金属
介在物がスラグ−メタルの界面を通してＲＥＭと接触す
るため、介在物の複合化が促進され、ＲＥＭ単体また
は、ＲＥＭ酸化物の濃度が高い非金属介在物が発生しな
くなる。その結果、得られた鋼材の伸線加工性や耐時効
性が従来より改良される。In the present invention, since nonmetallic inclusions formed in steel in advance come into contact with the REM through the slag-metal interface, compounding of the inclusions is promoted and the concentration of the REM alone or the REM oxide is reduced. No high non-metallic inclusions are generated. As a result, the drawability and aging resistance of the obtained steel material are improved as compared with the conventional steel material.
【００１４】[0014]
【発明の実施の形態】以下、発明をなすに至った経緯を
まじえ、本発明の実施の形態を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below on the basis of the circumstances leading to the invention.
【００１５】まず、発明者は、上記した従来の線材用高
炭素鋼の製造方法で得た素材中の非金属介在物の形態を
調査し、それらの大部分は、軟質化に望ましい複合化合
物になっていたが、まだＣａＯ，Ａｌ2Ｏ3，ＳｉＯ2等
の単体でも存在していることを知った。つまり、介在物
中のＲＥＭ含有量を定量したところ、０〜６０重量％の
範囲でバラツいており、すべてが完全な複合化合物にな
ってはいないことが判明した。素材中のＲＥＭは、あま
り多く含有されていてもＲＥＭ酸化物が単味の介在物と
なり、素材の伸延性に好ましい影響を与えないので、も
っとＲＥＭが確実に介在物を複合化する必要があると考
えられる。First, the inventor investigated the form of non-metallic inclusions in the raw material obtained by the above-mentioned conventional method for producing high-carbon steel for wire rods, and found that most of them were converted into composite compounds desirable for softening. However, I learned that CaO, Al 2 O 3 , SiO 2, etc. still exist. That is, when the content of the REM in the inclusions was quantified, it was found that the content varied in the range of 0 to 60% by weight, and it was found that not all of them were complete complex compounds. Even if the REM in the material is contained too much, the REM oxide becomes a simple inclusion and does not have a favorable effect on the extensibility of the material, so it is necessary to make the REM more surely compound the inclusion. it is conceivable that.
【００１６】そこで、発明者は、さらに研究を重ね、溶
製時のＲＥＭの添加方法に着眼した。つまり、従来は、
ＲＥＭ含有鉄合金が、溶鋼中に投入されるか、あるいは
吹き込まれていた。これでは、精錬時間には制限がある
ので、ＲＥＭが鋼中に単体のまま、あるいはＲＥＭ酸化
物として高い濃度で残留し、介在物の複合化が達成され
ない可能性が大である。Therefore, the inventor further studied and focused on a method of adding REM during melting. In other words, conventionally,
The REM-containing iron alloy was injected or blown into the molten steel. In this case, since the refining time is limited, there is a great possibility that the REM remains in the steel alone or at a high concentration as a REM oxide, and the inclusion is not compounded.
【００１７】本発明は、この従来のＲＥＭの添加方法を
改め、スラグ中にＲＥＭを直接含有させることで、上記
目的を達成するようにしたものである。スラグ中へＲＥ
Ｍを直接含有させる具体的手段としては、図１に示すよ
うに、取鍋１内の溶鋼２上に存在するスラグ３中に、直
接ＲＥＭ含有合金４をキャリア・ガス５（通常、アルゴ
ン・ガス）を用いて吹き込むようにしたしたり、あるい
はスラグ上に投入すれば良い。また、転炉出鋼後の温度
降下及びＲＥＭ添加によりスラグ３の温度が低下し、所
謂スラグ−メタル反応が円滑に行なえなくなる恐れもあ
る。そこで、本発明では、溶鋼２の二次精錬方法として
確立している所謂「レードル・ファーネス法；略称ＬＦ
法」を採用し、該スラグ３中に電極６を挿入し、通電す
ることで該スラグ３を加熱し、再溶融を行なったり、あ
るいは熔融状態の維持を十分にする。これによって、ス
ラグ・メタル反応は円滑になり、且つスラグへのＲＥＭ
添加処理のため、鋼中にＲＥＭの単体や酸化物が存在す
ることがなくなり、介在物の複合化が達成される。According to the present invention, the above-mentioned conventional method of adding REM is improved, and the above object is achieved by directly adding REM to slag. RE into slag
As a specific means for directly containing M, as shown in FIG. 1, a REM-containing alloy 4 is directly introduced into a slag 3 existing on molten steel 2 in a ladle 1 by a carrier gas 5 (usually an argon gas). ) May be blown in, or may be put on the slag. In addition, the temperature of the slag 3 may be lowered due to the temperature drop and the addition of REM after the output from the converter, and so-called slag-metal reaction may not be able to be performed smoothly. Therefore, in the present invention, the so-called “ladle furnace method;
Method, the electrode 6 is inserted into the slag 3, and the slag 3 is heated by energizing to re-melt or sufficiently maintain the molten state. As a result, the slag-metal reaction becomes smooth and the REM
Because of the addition treatment, the REM simple substance or oxide does not exist in the steel, and the inclusion is compounded.
【００１８】なお、本発明で溶製する溶鋼の主成分は、
従来から採用されている下記のもので十分である。The main component of the molten steel produced in the present invention is:
The following, which are conventionally employed, are sufficient.
【００１９】Ｃ：０．５〜１．０ｗｔ％、 Ｓｉ：０．１５〜０．５０ｗｔ％、 Ｍｎ：０．３０〜０．９０ｗｔ％、 Ｐ：＜０．０２０ｗｔ％、 Ｓ：＜０．０２０ｗｔ％、 また、この精錬に際しては、溶鋼中の酸素濃度は従来法
と同様に、２０ｐｐｍまで脱酸することが望ましい。さ
らに、スラグ中に含有させるＲＥＭ濃度は、溶製する高
炭素鋼の種類に応じて、変更させるものとする。C: 0.5 to 1.0 wt%, Si: 0.15 to 0.50 wt%, Mn: 0.30 to 0.90 wt%, P: <0.020 wt%, S: <0.020 wt% In this refining, the oxygen concentration in the molten steel is desirably deoxidized to 20 ppm as in the conventional method. Furthermore, the REM concentration contained in the slag is to be changed according to the type of the high carbon steel to be melted.
【００２０】[0020]
【実施例】まず、Ｐを０．０２０ｗｔ％未満，Ｓを０．
０２０ｗｔ％未満に予備処理した溶銑を、生産能力１８
０トンの上底吹き転炉（図示せず）で多数チャージにわ
たって酸素吹錬し、多数のタイヤ・コード用溶鋼とし
た。この溶鋼２を、それぞれＡｌ2Ｏ3を含有しない耐火
物で内張りした取鍋１（スラグ・ラインにマグネシア・
カーボン煉瓦、その他の部分にジルコニアを施工）に出
鋼し、低Ａｌ含有（０．０１ｗｔ％以下）のＦｅ−Ｓｉ
を５００ｇ，Ｆｅ−Ｍｎを１０００ｇ投入して脱酸並び
に成分調整した。そして、スラグ３のＣａＯ／ＳｉＯ2
が表１の値になるように、種々の組成のＣａＯ−ＳｉＯ
2−Ａｌ2Ｏ3系フラックス７を２０００ｋｇ添加し、脱
酸した。EXAMPLE First, P was less than 0.020 wt% and S was 0.1%.
The hot metal pretreated to less than 020 wt% has a production capacity of 18
Oxygen was blown over a large number of charges in a 0 ton top and bottom blown converter (not shown) to obtain a large number of molten steels for tire cords. The molten steel 2, magnesia to ladle 1 (slag line lined with refractory material not containing Al 2 O 3, respectively
Zirconia is applied to carbon bricks and other parts), Fe-Si with low Al content (0.01 wt% or less)
Of 500 g of Fe-Mn and 1000 g of Fe-Mn were added for deoxidation and component adjustment. And CaO / SiO 2 of slag 3
Are CaO-SiO of various compositions so that
The 2 -Al 2 O 3 based flux 7 was added 2000 kg, and deoxidation.
【００２１】次に、溶鋼２の上に存在するスラグ３の中
に、ＲＥＭ，Ｍｇ，Ｃａを含む鉄合金をアルゴン・ガス
５と共に吹き込み、スラグ中へのＲＥＭ添加を行なうと
共に、溶鋼中に溶鋼攪拌用ガス（アルゴン・ガス）７を
吹き込み、溶鋼を攪拌してスラグ・メタル反応を促進し
た。所定時間撹拌を続けた後、タンディッシュ（図示せ
ず）に出鋼した。なお、鉄合金の吹込みでスラグが固化
した場合もあったので、その場合には、取鍋１に電極４
を取り付け、スラグ３を通電加熱で再溶解しつつ撹拌処
理を行なった。タンディッシュに出鋼した溶鋼は、連続
鋳造でスラブ（鋳片）とした後、熱間圧延で５．５ｍｍ
φの線材にし、その中の非金属介在物を調査した。な
お、効果を比較するため、前記特開平１０−１８３２２
９号公報記載の従来方法で得た溶鋼による二次精錬及び
介在物調査も行なった。Next, an iron alloy containing REM, Mg, and Ca is blown into the slag 3 existing on the molten steel 2 together with the argon gas 5 to add REM to the slag and to add the molten steel into the slag. A stirring gas (argon gas) 7 was blown in to stir the molten steel to promote the slag-metal reaction. After continuing stirring for a predetermined time, the steel was tapped on a tundish (not shown). In some cases, the slag was solidified by the injection of the iron alloy.
And a stirring treatment was performed while the slag 3 was re-dissolved by heating with electricity. The molten steel that was tapped into a tundish was slab (slab) by continuous casting, and then 5.5 mm by hot rolling.
We made φ wire and investigated nonmetallic inclusions in it. In addition, in order to compare the effects, see Japanese Patent Application Laid-Open No. H10-18322.
Secondary refining using molten steel obtained by the conventional method described in Japanese Patent Publication No. 9 and examination of inclusions were also performed.
【００２２】本発明及び従来の線材用高炭素鋼の溶製方
法で得た５．５ｍｍφ線材の介在物個数指数（１μｍ以
上）、製品（０．１５ｍφ）への冷間引抜加工時の断線
回数指数、製品を１５０℃で３０分熱処理時効後のＲ．
Ａ（絞り％）を表１に一括して示す。Inclusion number index (1 μm or more) of 5.5 mmφ wire obtained by the method of the present invention and the conventional high carbon steel for wire rod, the number of disconnections during cold drawing to a product (0.15 mφ) Index, R.D. after heat treatment of the product at 150 ° C. for 30 minutes.
A (aperture%) is collectively shown in Table 1.
【００２３】表１より、本発明に係る方法で溶製した鋼
材は、従来の方法で得たものに比し、格段に優れている
ことが明らかである。なお、介在物中のＲＥＭ含有量を
調査したところ、本発明による線材では、２０〜４０ｗ
ｔ％程度に狭い範囲であったのに対し、従来の方法で
は、０〜６０ｗｔ％と広くばらついていた。つまり、本
発明により、介在物の複合化が改良されたものと推定さ
れる。From Table 1, it is clear that the steel material produced by the method according to the present invention is much better than that obtained by the conventional method. In addition, when the REM content in inclusions was investigated, in the wire according to the present invention, 20 to 40 w
While the range was as narrow as about t%, the conventional method varied widely from 0 to 60 wt%. In other words, it is presumed that the present invention has improved the inclusion compounding.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【発明の効果】以上述べたように、本発明により、伸線
加工性や耐時効性が従来より改良され、伸線加工時に断
線のない高炭素鋼線材が製造できるようになった。As described above, according to the present invention, the wire drawing workability and the aging resistance have been improved from the prior art, and it has become possible to produce a high carbon steel wire which is not broken during wire drawing.
【図１】本発明の実施に使用したレイドル・ファーネス
を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a ladle furnace used for carrying out the present invention.
１ 取鍋 ２ 溶鋼 ３ スラグ ４ ＲＥＭ含有鉄合金 ５ キャリア・ガス（アルゴン・ガス） ６ 電極 ７ 溶鋼攪拌用ガス ８ 電源 Reference Signs List 1 ladle 2 molten steel 3 slag 4 REM-containing iron alloy 5 carrier gas (argon gas) 6 electrode 7 molten steel stirring gas 8 power supply
Claims (5)
鍋に入れ、ＣａＯ／ＳｉＯ2を１．０〜１．５に調整し
たスラグと共に撹拌してスラグ−メタル反応を進行させ
て二次精錬する線材用高炭素鋼の溶製方法において、 前記スラグ中に、ＲＥＭ含有鉄合金を添加し、攪拌処理
することを特徴とする線材用高炭素鋼の溶製方法。1. C: 0.5 to 1.0 wt%, Si: 0.15 to 0.50 wt%, Mn: 0.30 to 0.90 wt%, P: <0.020 wt%, S: <0 .020Wt%, in the balance iron, and high carbon molten steel consisting of unavoidable impurities placed in the ladle, and stirred with slag to adjust the CaO / SiO 2 1.0-1.5 slag - proceeded metal reaction A method for producing high-carbon steel for wire rods, the method comprising: adding a REM-containing iron alloy to the slag and subjecting the slag to a stirring treatment.
加を、キャリア・ガスによる吹き込みで行なうことを特
徴とする請求項１記載の線材用高炭素鋼の溶製方法。2. The method according to claim 1, wherein the addition of the REM-containing iron alloy to the slag is performed by blowing with a carrier gas.
を、スラグ上へ投入で行なうことを特徴とする請求項１
記載の線材用高炭素鋼の溶製方法。3. The method according to claim 1, wherein the addition of the REM-containing iron alloy to the slag is performed by charging the slag.
The method for producing high-carbon steel for wire according to the above.
ラグに電極を挿入し、再加熱することを特徴とする請求
項２又は３記載の線材用高炭素鋼の溶製方法。4. The method for melting high carbon steel for a wire according to claim 2, wherein an electrode is inserted into the slag into which the REM-containing iron alloy has been blown and reheated.
以下とすることを特徴とする請求項１〜４のいずれかに
記載の線材用高炭素鋼の溶製方法。5. The concentration of dissolved oxygen in the molten steel is 20 ppm.
The method for smelting high carbon steel for a wire according to any one of claims 1 to 4, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01667699A JP3893785B2 (en) | 1999-01-26 | 1999-01-26 | Melting method of high carbon steel for wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01667699A JP3893785B2 (en) | 1999-01-26 | 1999-01-26 | Melting method of high carbon steel for wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000212635A true JP2000212635A (en) | 2000-08-02 |
| JP3893785B2 JP3893785B2 (en) | 2007-03-14 |
Family
ID=11922926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01667699A Expired - Fee Related JP3893785B2 (en) | 1999-01-26 | 1999-01-26 | Melting method of high carbon steel for wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3893785B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024201A (en) * | 2007-07-18 | 2009-02-05 | Japan Steel Works Ltd:The | Method for manufacturing superclean steel |
| CN101892353A (en) * | 2010-07-27 | 2010-11-24 | 南阳金戈利镁业有限公司 | Method for preparing magnesium-based desulfurizing agent |
| CN108950359A (en) * | 2018-06-19 | 2018-12-07 | 东北大学 | A method of improving photovoltaic industry cutting wire steel tensile strength and cleanliness |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062914B (en) * | 2017-04-27 | 2019-03-22 | 常州中车汽车零部件有限公司 | Table adds alloy machine and its application method with small-sized automatically |
-
1999
- 1999-01-26 JP JP01667699A patent/JP3893785B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024201A (en) * | 2007-07-18 | 2009-02-05 | Japan Steel Works Ltd:The | Method for manufacturing superclean steel |
| CN101892353A (en) * | 2010-07-27 | 2010-11-24 | 南阳金戈利镁业有限公司 | Method for preparing magnesium-based desulfurizing agent |
| CN108950359A (en) * | 2018-06-19 | 2018-12-07 | 东北大学 | A method of improving photovoltaic industry cutting wire steel tensile strength and cleanliness |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3893785B2 (en) | 2007-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110629132B (en) | Wire rod for ultra-high strength steel cord and method for producing same | |
| CN103320571B (en) | Refining method for reducing inclusions in steel for steel cord | |
| JP3550924B2 (en) | Method for manufacturing high carbon steel wire and wire | |
| JP2009167463A (en) | METHOD FOR PRODUCING Mn-CONTAINING EXTRA-LOW-CARBON STEEL | |
| CN112251561B (en) | Method for smelting low-titanium steel in electric furnace under high molten iron ratio condition | |
| JP3994456B2 (en) | Method for producing steel for wire rods with excellent drawability and cleanliness | |
| JP3893785B2 (en) | Melting method of high carbon steel for wire | |
| JP5205799B2 (en) | Method for melting Cr-containing low alloy steel | |
| JP3563463B2 (en) | Method and apparatus for manufacturing stainless steel | |
| JP2004169147A (en) | Refining process for clean steel containing extremely low amount of non-metallic inclusion | |
| JP3627755B2 (en) | Method for producing high cleanliness ultra low carbon steel with extremely low S content | |
| JP3536461B2 (en) | High carbon steel wire with excellent drawability and aging resistance | |
| RU2269578C1 (en) | Rail steel melting method in electric arc furnace | |
| JP4461495B2 (en) | Dephosphorization method of hot metal | |
| JP2003049216A (en) | Method for producing molten steel | |
| KR101707327B1 (en) | Method of manufacturing molten steel using electric arc furnace | |
| JPH05148525A (en) | Treatment of molten iron | |
| JP3836249B2 (en) | Method for melting high ferritic stainless steel with high Al content that suppresses refractory melting of refining vessel | |
| JPH07103416B2 (en) | High carbon steel wire manufacturing method | |
| JP7447878B2 (en) | Method for decarburizing molten Cr and method for producing Cr-containing steel | |
| CN115595493B (en) | Method for smelting low-phosphorus high-manganese steel based on ferromanganese reduction dephosphorization | |
| RU2398889C1 (en) | Procedure for melting rail steel | |
| JP3752740B2 (en) | Heat raising method for molten steel in ladle | |
| US2049091A (en) | Manufacture of metallic alloys | |
| JP3673409B2 (en) | Steel for high-strength ultrafine wire and method for producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20051026 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20061116 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20061121 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20061204 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091222 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101222 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101222 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111222 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121222 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |