JPH01149916A - Method for producing molten steel for high carbon extremely fine wire - Google Patents
Method for producing molten steel for high carbon extremely fine wireInfo
- Publication number
- JPH01149916A JPH01149916A JP30587187A JP30587187A JPH01149916A JP H01149916 A JPH01149916 A JP H01149916A JP 30587187 A JP30587187 A JP 30587187A JP 30587187 A JP30587187 A JP 30587187A JP H01149916 A JPH01149916 A JP H01149916A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- wire
- steel
- high carbon
- time
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 238000009628 steelmaking Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 238000005275 alloying Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 abstract description 11
- 238000005491 wire drawing Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 230000008018 melting Effects 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 7
- 229910000677 High-carbon steel Inorganic materials 0.000 abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 238000004220 aggregation Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 8
- 239000002893 slag Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005587 bubbling Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000009489 vacuum treatment Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 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〉
本発明は、高炭素極細線用溶鋼の溶製方法に関するもの
で、特に、自動車タイヤに織り込まれるスチールコード
用高炭素鋼の分野において、取鍋内での溶製に際し、タ
イヤコードの断線原因となる有害な非金属介在物の量を
低減すると共に、その介在物を伸線工程で伸線できるよ
うに改質する技術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 producing molten steel for high carbon ultra-fine wires, and is particularly applicable in the field of high carbon steel for steel cords woven into automobile tires. The present invention relates to a technology for reducing the amount of harmful non-metallic inclusions that cause tire cord breakage during melting in a pot, and for modifying the inclusions so that they can be drawn in the wire drawing process.
〈従来の技術〉
従来、自動車用タイヤコードに使用される高炭素鋼線材
は、一般にＣ：Ｑ、７〜０．９重世％（以下％と略す）
、 Ｓｉ ： ０．１５〜０．３０％、Ｍｎ ： ０
．４〜０．６％、Ｐ ： ０．００８〜０．１５％、Ｓ
： ０．０１〜０．０１５％を含み、残部は実質的に
鉄からなる組成で、不可避的に非金属介在物が含まれて
いる。最も細かい直径のタイヤコードは、直径０．１５
ｍまで冷間引抜きにより伸線される。<Conventional technology> Conventionally, high carbon steel wire rods used for automobile tire cords generally have a C:Q ratio of 7 to 0.9% (hereinafter abbreviated as %).
, Si: 0.15-0.30%, Mn: 0
．． 4-0.6%, P: 0.008-0.15%, S
: Contains 0.01 to 0.015%, with the remainder being substantially iron, and inevitably contains nonmetallic inclusions. The smallest diameter tire cord is 0.15 in diameter.
The wire is drawn by cold drawing up to m.
このような極細線への伸線工程において、高炭素鋼中に
存在する非金属介在物が、Ａ ｌ ２０ｆｆ、ＺｒＯ。In the process of drawing such ultra-fine wire, non-metallic inclusions present in the high carbon steel include Al 20ff and ZrO.
あるいはＭｇＯのように硬い角状の非金属介在物である
と、断線が生ずる。この断線の発生頻度が伸線長さ１ｏ
ｏｏｂ当り１回以上であると、伸線工程の定常作業が阻
害されるため、クレームの対象となる。したがって、タ
イヤコード用高炭素鋼中の非金属介在物をできるだけ低
減すること、および不可避的に混入する非金属介在物を
望ましくは、伸線中の断線原因となりにくい形態にする
ことが重要である。Alternatively, if it is a hard angular nonmetallic inclusion such as MgO, disconnection will occur. The frequency of occurrence of this wire breakage is
If the number of times per oob is more than one, the regular work of the wire drawing process will be hindered, and this will be the subject of a claim. Therefore, it is important to reduce the amount of non-metallic inclusions in high carbon steel for tire cords as much as possible, and to make the unavoidable non-metallic inclusions preferably in a form that is less likely to cause wire breakage during wire drawing. .
したがって、従来、上述したタイヤコードのような極細
線材用の高炭素鋼を溶製するに際して、主要な有害非金
属介在物である脱酸生成物Ａ １ ｔａｘの生成をなく
すため、Ａｌ脱酸を実施しないことが知られている。さ
らに、これに関連して、溶鋼中のＡ１．ＷＡ度を徹底し
て低下させるため、Ｆｅ−５ｉなどの合金材もへｌ含有
量の低いものを選んで使用している。また、溶鋼中の酸
素量を下げるため溶鋼中に低融点のフラックスを添加し
て真空処理中に溶鋼を撹拌する、いわゆるフラックス処
理によって脱酸を促進させている。Therefore, when producing high carbon steel for ultra-fine wire rods such as the tire cords mentioned above, Al deoxidation was conventionally used to eliminate the formation of deoxidation product A 1 tax, which is a major harmful nonmetallic inclusion. It is known that it will not be implemented. Furthermore, in this regard, A1 in molten steel. In order to thoroughly reduce the WA degree, alloy materials such as Fe-5i with low hel content are selected and used. Furthermore, in order to reduce the amount of oxygen in the molten steel, deoxidation is promoted by so-called flux treatment, in which a low melting point flux is added to the molten steel and the molten steel is stirred during vacuum treatment.
しかしながら、上述したような従来の溶製方法では以下
のような問題があった。However, the conventional melting method as described above has the following problems.
■ 真空処理中の溶鋼中の炭素の脱酸力がアルミニウム
の脱酸力より強まり、このために耐火物に含まれるＡ
ｆ 、Ｏ，がＣにより還元され、Ａ ｊ！ ｚｏｘ ＋
３ Ｇ −２Ａ ｊ！ ＋３ＣＯ（ガス）の反応によ
り溶鋼中の固溶アルミニウム濃度が増大する。この固溶
アルミニウムは、引続く連続鋳造中に空気との接触によ
り酸化してＡｌｔｏ。■ The deoxidizing power of carbon in molten steel during vacuum treatment becomes stronger than the deoxidizing power of aluminum, and for this reason the A contained in the refractory is
f , O, is reduced by C and A j! zox +
3G-2Aj! The solid solution aluminum concentration in molten steel increases due to the reaction of +3CO (gas). This solid solution aluminum is oxidized by contact with air during subsequent continuous casting to form Alto.
となり鋳片内に残留し、伸線時の断線の原因となる。This will remain in the slab and cause wire breakage during wire drawing.
■ フラックス処理の際添加されるフラックスは、本来
溶鋼中に均一に溶解するものではなくスラグとして別相
で存在するので、溶鋼中のＡ ｌ ｔａｘと接触、合体
する機会が少なく、フラックス処理による脱酸の効率は
低く、そのために長時間の真空処理が必要であった。■ Flux added during flux treatment does not originally dissolve uniformly in molten steel, but exists in a separate phase as slag, so there is little opportunity for it to come into contact with and coalesce with Al tax in molten steel, making it difficult to remove by flux treatment. The efficiency of acids was low, which required long vacuum treatments.
〈発明が解決しようとする問題点〉
本発明は、前述のような従来技術の問題点に鑑み、タイ
ヤコードのように極細線化される鋼にとっては有害であ
るＡ１．２０２量を低減し、かつ残存するＡ Ｉ！ ｇ
ｏｓを伸線できるように改質する溶鋼溶製方法に関する
ものである。<Problems to be Solved by the Invention> In view of the problems of the prior art as described above, the present invention reduces the amount of A1.202, which is harmful to steel that is made into ultra-fine wires such as tire cords, and And the remaining AI! g
This invention relates to a method for producing molten steel that modifies os so that it can be drawn.
〈問題点を解決するための手段〉
本発明者らは、高炭素極細線用溶鋼中のＡ １２ ｔａ
ｘの低減および改質について鋭意研究を重ねた結果、溶
鋼中にＳｉを添加し溶製することによって目的を達成す
ることができるとの知見を得、この知見にもとづいて本
発明をなすに至った。<Means for solving the problem> The present inventors have discovered that A 12 ta in molten steel for high carbon ultra-fine wire
As a result of extensive research into the reduction and modification of Ta.
本発明は、高炭素極細線用溶鋼を溶製するに際し、製鋼
炉から取鍋への出鋼時に該溶鋼中にＳｉ。In the present invention, when producing molten steel for high-carbon ultra-fine wire, Si is contained in the molten steel when the molten steel is tapped from a steelmaking furnace to a ladle.
またはＳｉを多量に含む合金をＳｉ量換算で２〜１０ｋ
ｇハ添加し、その後取鍋内溶鋼を撹拌しながら酸素吹精
し、さらに合金元素を添加して成分の微調整を行うこと
を特徴とする高炭素極細線用溶鋼の溶製方法である。Or an alloy containing a large amount of Si, in terms of Si amount, 2 to 10k
This is a method for producing molten steel for high-carbon ultrafine wire, which is characterized in that the molten steel for high-carbon ultrafine wires is added, and then the molten steel in the ladle is blown with oxygen while stirring, and further alloying elements are added to finely adjust the composition.
〈作 用〉
本発明においては、製鋼炉から取鍋への出鋼時にＳｉを
２〜１０ｋｇハ添加する。製鋼炉出鋼時の溶鋼には２０
０ｐｐｍ＋程度の酸素が存在しているので、添加したＳ
ｉの一部はＳ＋０．となる、このＳｉＪは、出鋼中に排
出される鋼滓の一部とさらに溶鋼中に存在するＡ ｆｆ
ｉ 、０．と合体しＣａＯ−５ｉＯ１−Ａ ｌ ２０．
成分の介在物となる。これらは、互いに凝集肥大し、浮
上分離するので、結果として溶鋼中のＡ ｌ 、０．は
除去されてしまう。<Function> In the present invention, 2 to 10 kg of Si is added when steel is tapped from a steelmaking furnace to a ladle. 20 for molten steel during steelmaking furnace tapping
Since approximately 0 ppm+ of oxygen exists, the added S
Part of i is S+0. This SiJ is a part of the steel slag discharged during tapping and A ff that is present in the molten steel.
i, 0. Combine with CaO-5iO1-A l 20.
Becomes inclusions of ingredients. These agglomerate and thicken each other and float and separate, resulting in Al in the molten steel of 0. will be removed.
このように添加したＳＩの一部は５ｉ０１となり、＾ｊ
！ ｇｏｓの除去に使われるが残りは溶鋼に溶解してい
る。A part of the SI added in this way becomes 5i01, ^j
! It is used to remove gos, but the rest is dissolved in molten steel.
この溶解Ｓｉは、高炭素極細線材に要求されている。成
分組成のＳｉ濃度に比べて高い濃度で存在する。This dissolved Si is required for high carbon ultrafine wires. It exists at a higher concentration than the Si concentration in the component composition.
この余剰な溶解Ｓｉは、溶鋼中の溶解Ａ２の活性を高め
てＡ ｆ ｚｏｉ として析出し易くすると共に、この
ようにして析出したＡ ｆ 、０．と直ちに反応して、
低融点の無害で延性のあるＡ ｊ！ ｚ０３−３ｉＯ１
系介在物に改質させてしまう働きがある。このような働
きを継続させるには、溶鋼中に酸素を供給する必要があ
る。そこでＳｉを含有する溶鋼をバブリング等で撹拌し
ながら酸素吹精する。酸素吹精後は撹拌を継続しながら
、合金元素を添加して成分の微調整を行って高炭素極細
線用の溶鋼を溶製する。なお、酸素吹精時に生成する５
ｉｆｔは、トップスラグ中に吸収されるので溶鋼の清浄
度は非常に高いものとなる。なお、撹拌処理の際に溶鋼
にＣａＯ系のフラックスを添加して、スラグによるＳｉ
ｎｇやＡ２□０２−３ｉｆｔ系の介在物の吸収能を高め
ると、より一層効果的である。This excess molten Si increases the activity of molten A2 in the molten steel, making it easier to precipitate as A f zoi , and also causes the precipitated A f , 0. I immediately reacted,
A harmless and ductile A j with a low melting point! z03-3iO1
It has the effect of modifying system inclusions. In order to continue this operation, it is necessary to supply oxygen to the molten steel. Therefore, the molten steel containing Si is blown with oxygen while being stirred by bubbling or the like. After oxygen blowing, while stirring is continued, alloying elements are added to finely adjust the composition to produce molten steel for high carbon ultrafine wire. In addition, the 5 produced during oxygen ejaculation
Since the ift is absorbed into the top slag, the cleanliness of the molten steel is extremely high. In addition, CaO-based flux is added to the molten steel during the stirring process to remove Si due to slag.
It is even more effective to increase the absorption capacity of ng and A2□02-3ift inclusions.
溶鋼中のＡｊ！ｇｏｓを除去するためには、製鋼炉から
の出鋼時にＳｉを添加するのが良い、すなわち、出鋼流
の撹拌エネルギーと出鋼中に混入する鋼滓とを利用して
Ａ １ ｇｏｓを除去するのであるから、Ｓｉの添加は
出鋼時が最も良い。Aj in molten steel! In order to remove gos, it is better to add Si when tapping steel from a steelmaking furnace. In other words, A 1 gos can be removed by using the stirring energy of the tapping flow and the steel slag mixed in during tapping. Therefore, it is best to add Si at the time of tapping.
添加ＳｉＩを２〜１０ｋｇハと限定するのはつぎの理由
による。すなわち、高炭素極細線用溶鋼中のＳｉ量は這
常０．２０％程度であり、２ ｋｇ／を以下の添加では
以後のＡ１．ｚＯｓ との反応に使用できるＳｉが溶鋼
中になく、Ａ Ｉ！ ｔ（ｈの除去ないし改質が十分で
きないからである。 １０ｋｇハ以下と限定したのは有
害なＡ ＩＬ ｚＯｓの除去または改質にはこれ以下で
十分であり、１０ｋｇ／ｌを超えると、いたずらに酸素
吹精の時間が長くなり、かえって溶鋼の過熱による取鍋
耐大物の溶損の発生や、後に添加すべき合金元素量が多
くなるなどの結果となるためである。The reason why the amount of added SiI is limited to 2 to 10 kg is as follows. That is, the amount of Si in molten steel for high-carbon ultra-fine wires is usually about 0.20%, and if the amount of addition is less than 2 kg/min, the subsequent A1. There is no Si in the molten steel that can be used for reaction with zOs, and A I! This is because the removal or modification of t(h) cannot be performed sufficiently.The reason for limiting the amount to 10 kg/l or less is that less than this is sufficient for the removal or modification of harmful AIL zOs, and if it exceeds 10 kg/l, it may cause mischief. This is because the oxygen blowing time becomes longer, which results in the occurrence of melting damage to the ladle-resistant material due to overheating of the molten steel, and an increase in the amount of alloying elements to be added later.
酸素吹精と合金元素添加時に溶鋼をバブリングなどによ
って撹拌するのは、酸素吹精および合金元素添加の際に
反応面にＳｉを含有する溶鋼を更新させるためであり、
撹拌しなければＦｅを酸化し、また成分調整の時間が長
くなるという不都合が生じる。The reason why the molten steel is stirred by bubbling etc. when adding the oxygen blast and alloying elements is to renew the molten steel containing Si on the reaction surface when adding the oxygen blast and alloying elements.
If stirring is not performed, Fe will be oxidized and the time required for component adjustment will be longer.
添加するＳｉとして、金属Ｓｉはもちろん、Ｆｅ−５ｉ
＋Ｃａ、−３ｉ合金であっても本発明の効果は変らない
。The Si to be added includes not only metal Si but also Fe-5i.
Even if +Ca or -3i alloys are used, the effects of the present invention will not change.
また、本発明では酸素吹精の際に溶鋼が昇熱するので、
製鋼炉の出鋼温度は低くてもよいので、製鋼炉耐火物が
溶損してこれがスラグに混入し、Ａｆ 源となること
をも効果的に防止できる。In addition, in the present invention, since the molten steel heats up during oxygen blowing,
Since the tapping temperature of the steelmaking furnace may be low, it is also possible to effectively prevent the steelmaking furnace refractories from being melted and mixed into the slag and becoming an Af source.
〈実施例１〉
１６６０°Ｃで転炉出鋼した２００ｔの溶鋼に金属ｓｉ
：ＩＬを添加した。<Example 1> Metal Si was added to 200 tons of molten steel extracted from a converter at 1660°C.
:IL was added.
つぎに、Ａｒバブリングしなから取鍋溶鋼に酸素を吹き
付けた＊ ３ＯＮｍ’／＋ｗｉｎの送酸速度で約２０
分酸素吹精した。以後成分の微調整を行って最終的にＣ
：０．７４％、Ｓｉ ： ０．２１％、Ｍｎ ： ０．
５３％の高炭素極細線用溶鋼とした。最終製品として０
．１７５ｓφの極細線としたが、伸線時の断線は平均０
．１５回／１０’ ｍであった。Next, oxygen was blown onto the molten steel in the ladle without Ar bubbling.
I ejaculated with oxygen. After that, we fine-tune the components and finally obtain C.
: 0.74%, Si: 0.21%, Mn: 0.
53% high carbon molten steel for ultra-fine wire. 0 as final product
．． Although the wire was made to be extremely thin with a diameter of 175sφ, the average number of wire breaks during wire drawing was 0.
．． It was 15 times/10'm.
〈実施例２〉
１６６５°Ｃで転炉出鋼した２００ｔ（７）溶鋼ニｃａ
５ｉ（Ｓｉ ： ６０％）を２００ ｋｇ 、金属
Ｓｉを７００ｋｇ添加した。<Example 2> 200t (7) molten steel tapped at 1665°C in a converter
200 kg of 5i (Si: 60%) and 700 kg of metal Si were added.
つぎにＡｒバブリングしなから取鍋溶鋼に酸素を吹き付
けた。 ２５Ｎｍ’１０＋ｉｎの送酸速度で約２０分
酸素吹精をした。以後成分の微調整を行って最終的にＣ
： ０．８０％、Ｓｉ ： ０．２２％、Ｍｎ ： ０
．５０％の高炭素極細線用溶鋼とした。最終製品として
０．１７５ｍｍφの極細線としたが、伸線時の断線は平
均０．１７回／１０−ｍであった。Next, oxygen was blown onto the molten steel in the ladle while Ar bubbling was performed. Oxygen ejaculation was performed for approximately 20 minutes at an oxygen supply rate of 25 Nm'10+in. After that, we fine-tune the components and finally obtain C.
: 0.80%, Si: 0.22%, Mn: 0
．． It was made into molten steel for 50% high carbon ultra-fine wire. The final product was an ultrafine wire with a diameter of 0.175 mm, and the wire breakage during wire drawing was 0.17 times/10-m on average.
く比較例〉
比較例として、転炉出鋼時の出鋼温度１７００℃、溶鋼
成分がＣ： ０．７０％、Ｓｉ ： ０．２０％、Ｍｎ
： ０．５０％、Ｐ ： ０．０１２％、Ｓ ７０．
０１４％の溶鋼にＣａＯ： ４５％、ＳｉＯ□：５１％
、Ａ ｊ！ ｇｏｓ ： ２．５％の組成のフラックス
を、溶鋼１トン当り１５ｋｇの割合で、ＲＨ真空処理中
に真空槽内に投入・添加して、従来方法により直径０．
２５ｍａ＋の極細線を製造した。この比較例での伸線工
程時における断線は０．５８回／ｌｏ”ｍにも達し、不
良であった。Comparative Example> As a comparative example, the tapping temperature during tapping in a converter was 1700°C, and the molten steel components were C: 0.70%, Si: 0.20%, Mn.
: 0.50%, P: 0.012%, S 70.
014% molten steel with CaO: 45%, SiO□: 51%
, A j! gos: A flux with a composition of 2.5% is added to a vacuum chamber during RH vacuum treatment at a rate of 15 kg per ton of molten steel, and the flux is reduced to a diameter of 0.0 mm by a conventional method.
A 25ma+ ultrafine wire was manufactured. In this comparative example, the wire breakage during the wire drawing process reached 0.58 times/lo''m, which was poor.
以上の実施例、比較例から本発明の効果は明らかである
。The effects of the present invention are clear from the above Examples and Comparative Examples.
〈発明の効果〉
本発明方法によると、取鍋内での溶製に際し、タイヤコ
ードのようにｍ線化される餌の断線原因となるＡ ｆｆ
ｉ ！０３の介在物を効果的に減少させ、かつ残存する
介在物を改質させることによって、伸線時の断線の少な
い高炭素極細線用溶鋼を提供することができる。<Effects of the Invention> According to the method of the present invention, during melting in a ladle, A ff, which causes disconnection of the m-wire bait like a tire cord, is eliminated.
i! By effectively reducing the inclusions of No. 03 and modifying the remaining inclusions, it is possible to provide molten steel for high carbon ultra-fine wires with less wire breakage during wire drawing.
特許出願人 川崎製鉄株式会社Patent applicant: Kawasaki Steel Corporation
Claims (1)
への出鋼時に該溶鋼中にＳｉ、またはＳｉを多量に含む
合金をＳｉ量換算で２〜１０ｋｇ／ｔ添加し、その後取
鍋内溶鋼を撹拌しながら酸素吹精し、さらに合金元素を
添加して成分の微調整を行うことを特徴とする高炭素極
細線用溶鋼の溶製方法。When producing molten steel for high-carbon ultra-fine wires, Si or an alloy containing a large amount of Si is added to the molten steel at a rate of 2 to 10 kg/t in terms of the amount of Si when the steel is tapped from the steelmaking furnace to the ladle, and then A method for producing molten steel for high carbon ultra-fine wire, which is characterized by oxygen blowing the molten steel in a pot while stirring, and further adding alloying elements to finely adjust the composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30587187A JPH01149916A (en) | 1987-12-04 | 1987-12-04 | Method for producing molten steel for high carbon extremely fine wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30587187A JPH01149916A (en) | 1987-12-04 | 1987-12-04 | Method for producing molten steel for high carbon extremely fine wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01149916A true JPH01149916A (en) | 1989-06-13 |
Family
ID=17950351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30587187A Pending JPH01149916A (en) | 1987-12-04 | 1987-12-04 | Method for producing molten steel for high carbon extremely fine wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01149916A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019188540A1 (en) | 2018-03-29 | 2019-10-03 | 日産化学株式会社 | Composition for forming undercoat layer of energy storage device |
-
1987
- 1987-12-04 JP JP30587187A patent/JPH01149916A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019188540A1 (en) | 2018-03-29 | 2019-10-03 | 日産化学株式会社 | Composition for forming undercoat layer of energy storage device |
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