JP3182984B2 - Manufacturing method of high strength extra fine steel wire - Google Patents
Manufacturing method of high strength extra fine steel wireInfo
- Publication number
- JP3182984B2 JP3182984B2 JP15065693A JP15065693A JP3182984B2 JP 3182984 B2 JP3182984 B2 JP 3182984B2 JP 15065693 A JP15065693 A JP 15065693A JP 15065693 A JP15065693 A JP 15065693A JP 3182984 B2 JP3182984 B2 JP 3182984B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- steel wire
- less
- diameter
- ultrafine
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高強度極細鋼線の製法
に関し、特にねじれや波打ちがなく直線性に優れ且つ４
００kgf/mm2 レベル以上の引張強さを持った極細鋼線を
得ることのできる方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a high-strength ultrafine steel wire, and more particularly, to a method for producing a high-strength ultra-fine steel wire which is free from twisting and waving, has excellent linearity, and has a high linearity.
The present invention relates to a method for obtaining an ultrafine steel wire having a tensile strength of at least 00 kgf / mm 2 level.
【０００２】[0002]
【従来の技術】たとえばラジアルタイヤやベルトコンベ
ア等の補強材として広く用いられているスチールコード
は、通常、熱間圧延後調整圧延して得た直径５．５mm程
度の素線を、一次伸線、パテンティング、二次伸線、再
度のパテンティングを経た後、防錆のためのブラスめっ
きを施し、湿式伸線に付して直径０．１５〜０．４mm程
度にした後、最終仕上伸線により直径０．０１〜０．１
２mm程度の極細鋼線を得ている。2. Description of the Related Art For example, a steel cord widely used as a reinforcing material for a radial tire, a belt conveyor, or the like is usually prepared by firstly drawing a wire having a diameter of about 5.5 mm obtained by hot-rolling and then adjusting and rolling. After passing through patenting, secondary drawing and re-patenting, it was subjected to brass plating for rust prevention, and was subjected to wet drawing to a diameter of about 0.15 to 0.4 mm, followed by final finishing drawing. 0.01 to 0.1 in diameter depending on the wire
A very fine steel wire of about 2 mm has been obtained.
【０００３】この極細鋼線は、その後数本乃至数十本を
撚り合わせてスチールコードとされるが、この撚り線工
程では強いねじり、引張り及び曲げ応力を受ける。従っ
て極細鋼線が強度不足であったり、あるいは僅かな欠陥
があっても、撚り線工程で断線を起こし、生産性や製品
歩留りを低下させるばかりでなく、最終製品としてのス
チールコードの品質を低下させる。[0003] After that, several to several tens of such ultrafine steel wires are twisted to form a steel cord. In this twisting wire process, strong twisting, tensile and bending stress are applied. Therefore, even if the ultra-fine steel wire has insufficient strength or has slight defects, it will break in the stranded wire process, not only reducing the productivity and product yield, but also lowering the quality of the steel cord as the final product. Let it.
【０００４】[0004]
【発明が解決しようとする課題】上記の様にスチールコ
ード用等として用いられる極細鋼線は、撚り線工程等で
断線を生じることのない様に高強度であることが要求さ
れるが、本発明者らが種々研究を重ねたところによる
と、撚り線工程で生じる断線事故の発生頻度は強度のみ
に依存するのではなく、極細鋼線の直線性によっても著
しく影響を受けることが明らかとなった。即ち従来法に
よって得られる極細鋼線には大なり小なり波打ちやねじ
れが見られ、それらの程度が大きいもの（従って直線性
の悪いもの）ほど、最終製品としてのスチールコードの
品質も悪くなることが確認された。As described above, ultrafine steel wires used for steel cords and the like are required to have high strength so as not to cause breakage in a stranded wire process or the like. The inventors have conducted various studies and found that the frequency of disconnection accidents occurring in the stranding process does not depend only on the strength, but is also significantly affected by the linearity of the ultrafine steel wire. Was. In other words, the ultrafine steel wire obtained by the conventional method is more or less wavy or twisted, and the quality of the steel cord as a final product is deteriorated as the degree of the waviness or the degree of the distortion is increased. Was confirmed.
【０００５】こうした極細鋼線に見られる波打ちやねじ
れ現象は、最終パテンティング後の伸線工程で生じるも
のと思われる。即ちこの伸線加工は、通常多数段の伸線
ダイスを通して円筒型のキャプスタンで牽引する湿式の
ストリップ式連続伸線機を用いて行なわれ、波打ちやね
じれを防止するには伸線ダイスのダイス孔と線材の引抜
き方向を正確に直交させることが必要であり、わずかな
ズレがあっても引抜線材に波打ちやねじれが生じてく
る。そして極細鋼線を得るための伸線工程でこの様な波
打ち現象等をなくすには伸線ダイスの取付け精度をミク
ロン単位で微調整しなければならず、実用規模の伸線装
置でこの様な取付け精度を得ることは至難のことであ
る。It is considered that the waving and twisting phenomena observed in the ultrafine steel wire occur in the drawing process after the final patenting. That is, this wire drawing is usually performed using a wet strip type continuous wire drawing machine which is pulled by a cylindrical capstan through a multi-stage wire drawing die. To prevent waving and twisting, the wire drawing die is used. It is necessary that the hole and the wire are drawn in a direction perpendicular to each other accurately, and even if there is a slight deviation, the drawn wire becomes wavy or twisted. In order to eliminate such a waving phenomenon in the drawing process for obtaining ultrafine steel wire, the mounting accuracy of the drawing die must be finely adjusted in micron units. Obtaining mounting accuracy is extremely difficult.
【０００６】本発明は上記の様な事情に着目してなされ
たものであって、その目的は、仕上げ伸線工程で従来レ
ベルのダイス取付け精度に設定した場合でも、高強度で
しかも直線性に優れた極細鋼線を得ることのできる技術
を確立しようとするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide a high strength and linearity even when the die mounting accuracy is set to a conventional level in the finishing wire drawing process. The aim is to establish a technology that can obtain excellent ultrafine steel wire.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決すること
のできた本発明の構成は、Ｃ：０．５０％以上１．０％
未満、Ｓｉ：０．１〜０．７％、Ｍｎ：０．６％以下、
Ｐ：０．０２％以下、Ｓ：０．０２％以下Ａｌ：０．０
０３％以下、残部：鉄および不可避不純物の要件を満た
す高炭素鋼素線にパテンティング処理および伸線加工を
繰り返し、最終パテンティング処理で直径０．１〜１．
０mmの細線とした後、真歪で４〜６の範囲で伸線加工を
施すことにより０．０１〜０．１２mmの仕上げ線径を得
た後、該極細鋼線の破断荷重に対して２５％以上のバッ
クテンションを付与しつつ４００℃以上のＳＲ処理を施
し、直線性を高めるところに要旨を有するものである。Means for Solving the Problems The constitution of the present invention which can solve the above-mentioned problems is as follows: C: 0.50% to 1.0%
Less, Si: 0.1-0.7%, Mn: 0.6% or less,
P: 0.02% or less, S: 0.02% or less Al: 0.0
03% or less, balance: Repeating patenting and wire drawing on high carbon steel wires satisfying requirements of iron and unavoidable impurities, and final patenting process with diameter of 0.1-1.
After forming a fine wire of 0 mm, the wire is drawn with a true strain in the range of 4 to 6 to obtain a finished wire diameter of 0.01 to 0.12 mm. The SR has a gist in that it is subjected to SR treatment at 400 ° C. or more while giving a back tension of at least% to enhance linearity.
【０００８】[0008]
【作用】上記の様に本発明では、使用する鋼材の成分組
成を特定すると共に、最終パテンティング処理後の真歪
の特定された仕上げ伸線によって目標線径にまで伸線
し、その後所定のＳＲ処理を施すものであり、これらの
要件を定めることによって線径が０．０１〜０．１２mm
で４００kgf/mm2 レベル以上の強度を有する直線性の優
れた極細鋼線を得ることができる。まず本発明で用いる
素鋼線の成分組成を定めた理由は次の通りである。As described above, according to the present invention, the component composition of the steel material to be used is specified, and the steel wire is drawn to the target wire diameter by the finish drawing in which the true strain has been specified after the final patenting process, and thereafter, the predetermined wire drawing is performed. The SR process is performed, and the wire diameter is 0.01 to 0.12 mm by defining these requirements.
Thus, an ultrafine steel wire having a strength of 400 kgf / mm 2 level or more and excellent in linearity can be obtained. First, the reasons for determining the component composition of the steel wire used in the present invention are as follows.
【０００９】Ｃ：０．５０％以上１．０％未満 強化元素として重要な成分であり、４００kgf/mm2 レベ
ル以上の高強度を確保するには０．５％以上含有させな
ければならない。しかしＣ量が多くなり過ぎると偏析部
に初析セメンタイトが発生して靭・延性が低下し断線を
起こす原因になるので、１．０％未満に抑えなければな
らない。Ｃのより好ましい含有量は０．７〜０．８５％
の範囲である。C: 0.50% or more and less than 1.0% C is an important component as a strengthening element, and must be contained in an amount of 0.5% or more to secure a high strength of 400 kgf / mm 2 or more. However, if the C content is too large, proeutectoid cementite is generated in the segregated portion, which causes toughness and ductility to decrease and cause disconnection. Therefore, it must be suppressed to less than 1.0%. A more preferable content of C is 0.7 to 0.85%.
Range.
【００１０】Ｓｉ：０．１〜０．７％ Ｓｉは脱酸に必要な元素であり、０．１％未満では脱酸
不足による強度欠陥が表われる。特に本発明では、次に
示す様に制御圧延段階での過冷部組織の発生を抑えるた
めにＭｎ量を制限しているので、Ｍｎによる脱酸効果が
あまり期待できない。従って脱酸を十分に行なって非金
属介在物量を低減するには、通常のピアノ線材に規定さ
れるＳｉ含有量よりも若干多めにする必要がある。しか
しＳｉ量が多くなり過ぎると、靭・延性が低下するばか
りでなく、スチールコードの連続生産時に行なわれるワ
イヤ接合時の溶接性が悪くなり、伸線時あるいは撚線加
工時に該溶接部で断線を起こし易くなるので、Ｓｉ量は
０．７％以下に抑えなければならない。Ｓｉのより好ま
しい含有量は０．１５〜０．５％の範囲である。Si: 0.1 to 0.7% Si is an element necessary for deoxidation. If it is less than 0.1%, a strength defect due to insufficient deoxidation appears. In particular, in the present invention, since the amount of Mn is limited in order to suppress the formation of the supercooled portion structure in the controlled rolling stage as shown below, the deoxidizing effect of Mn cannot be expected so much. Therefore, in order to sufficiently perform deoxidation and reduce the amount of nonmetallic inclusions, it is necessary to slightly increase the Si content specified in a normal piano wire. However, when the amount of Si is too large, not only does the toughness and ductility decrease, but also the weldability at the time of wire joining performed during continuous production of steel cord deteriorates. Therefore, the amount of Si must be suppressed to 0.7% or less. The more preferred content of Si is in the range of 0.15 to 0.5%.
【００１１】Ｍｎ：０．６％以下 Ｍｎは強化元素として作用するほか脱酸による非金属介
在物の低減に寄与するが、焼入れ性を著しく高めるた
め、本発明の様に極細鋼線を対象とする鋼材中のＭｎ量
を多くすると制御圧延時の焼入れ硬化によって断線を起
こし易くなる。従って本発明においては、極細鋼線への
制御圧延を容易にするためＭｎ量を０．６％以下に抑え
なければならない。Mn: 0.6% or less Mn not only acts as a strengthening element but also contributes to the reduction of nonmetallic inclusions by deoxidation. When the amount of Mn in the steel material to be increased is increased, disconnection is likely to occur due to quench hardening during controlled rolling. Therefore, in the present invention, the amount of Mn must be suppressed to 0.6% or less in order to facilitate the controlled rolling to the ultrafine steel wire.
【００１２】Ｐ：０．０２％以下、Ｓ：０．０２％以下 Ｐ及びＳはいずれも介在物源となって靭・延性を悪化さ
せるので、夫々０．０２％以下、より好ましくは０．０
１％以下に抑えることが望まれる。 Ａｌ：０．００３％以下 極細鋼線への伸線加工時に生じた断線の破面を観察する
と種々の欠陥が認められるが、断線に大きな影響を及ぼ
している原因の１つとして非延性介在物が挙げられる。
この非延性介在物は主にＡｌ2 Ｏ3 やＭｇＯ−Ａｌ2 Ｏ
3 の如くＡｌ2Ｏ3 を主成分とする介在物であり、こう
した非延性介在物に起因する断線を抑えるには、Ａｌ含
有量を０．００３％以下に抑えなければならない。P: 0.02% or less, S: 0.02% or less Since P and S both act as inclusions and deteriorate toughness and ductility, they are each 0.02% or less, more preferably 0.1% or less. 0
It is desired to keep it to 1% or less. Al: 0.003% or less When observing the broken surface of the wire that occurred during the wire drawing to the ultrafine steel wire, various defects were observed. One of the causes that greatly affected the wire breakage was non-ductile inclusion. Is mentioned.
This non-ductile inclusion is mainly composed of Al 2 O 3 or MgO-Al 2 O
As shown in FIG. 3 , the inclusion is mainly composed of Al 2 O 3 , and in order to suppress disconnection caused by such non-ductile inclusion, the Al content must be suppressed to 0.003% or less.
【００１３】本発明で使用する高炭素鋼は上記成分組成
の要件を満たし、残部が鉄及び不可避不純物からなるも
のであり、不可避不純物としてはＯ，Ｎ等が挙げられる
が、これらはいずれも非金属介在物源となって靭・延性
に悪影響を及ぼすので、できるだけ少なく抑えることが
望まれる。The high-carbon steel used in the present invention satisfies the above requirements for the composition of the composition, with the balance being iron and unavoidable impurities. Examples of the unavoidable impurities include O and N. Since it becomes a source of metal inclusions and adversely affects toughness and ductility, it is desired that the content be minimized.
【００１４】本発明では、上記成分組成の高炭素鋼素線
を常法に従ってパテンティング処理及び伸線加工を繰り
返し、最終のパテンティング処理で直径０．１〜１．０
mmの細線とする。次いで好ましくは防錆のためのブラス
めっきなどを施した後、湿式伸線により仕上げ線径が
０．０１〜０．１２mmの極細鋼線を得る。In the present invention, the high-carbon steel wire having the above-mentioned composition is repeatedly subjected to patenting and drawing in accordance with a conventional method, and the final patenting is performed to obtain a diameter of 0.1 to 1.0.
mm. Next, preferably, after being subjected to brass plating or the like for rust prevention, an ultrafine steel wire having a finished wire diameter of 0.01 to 0.12 mm is obtained by wet drawing.
【００１５】この湿式伸線工程では細鋼線にかかる歪が
真歪で４〜６の範囲となる様に伸線条件を制御しなけれ
ばならず、真歪が４未満では低加工のため、強度が十分
に上がらず、一方真歪が６を超えると強加工となるため
靭性の非常に乏しいものとなり、いずれの場合も本発明
の目的が達成できなくなる。In this wet drawing process, the drawing conditions must be controlled so that the strain applied to the thin steel wire is in the range of 4 to 6 in true strain. If the strength is not sufficiently increased, and if the true strain exceeds 6, on the other hand, the work becomes strong and the toughness becomes extremely poor. In any case, the object of the present invention cannot be achieved.
【００１６】この湿式伸線の後は、所定の条件でＳＲ処
理を施す。このＳＲ処理は、上記伸線工程で回避するこ
とのできない極細鋼線の波打ちやねじれを直して直線性
を高めるために行なわれるものであり、こうした目的を
達成するためには、極細鋼線の破断荷重に対して２５％
以上のバックテンションを付与しつつ４００℃以上、よ
り好ましくは４１０〜４５０℃の範囲でＳＲ処理する必
要がある。ちなみに図１は、温度とバックテンションを
種々変えてＳＲ処理を行なったときの曲がり寸法を調べ
た結果を示したグラフであり、実験条件は下記の通りと
した。After this wet drawing, SR processing is performed under predetermined conditions. This SR treatment is performed to improve the linearity by correcting the waving and twisting of the ultrafine steel wire which cannot be avoided in the above-described drawing process. 25% of breaking load
It is necessary to perform SR treatment at 400 ° C. or higher, more preferably in the range of 410 to 450 ° C., while providing the above back tension. Incidentally, FIG. 1 is a graph showing the result of examining the bending dimension when performing SR processing while changing the temperature and the back tension variously. The experimental conditions were as follows.
【００１７】（実験条件） 高炭素鋼成分；Ｃ：０．７％，Ｓｉ：０．１９％，Ｍ
ｎ：０．５３％，Ｐ：０．００８％，Ｓ：０．００３
％，Ａｌ：０．００３％，残部：Ｆｅおよび不可避不純
物 最終仕上げ線径；２５μｍ 仕上り極細鋼線の破断荷重；５００kgf/mm2 仕上り状態（ＳＲ処理前）の曲がり量；直径２５mm ＳＲ処理後の曲がり量；図２に示す如くＳＲ処理後の極
細鋼線１を所定長さに切断し、直線長さ１００mmにおけ
る最大曲がり量（ｄ）によって評価する。(Experimental conditions) High carbon steel component; C: 0.7%, Si: 0.19%, M
n: 0.53%, P: 0.008%, S: 0.003
%, Al: 0.003%, balance: Fe and inevitable impurities Final finished wire diameter: 25 μm Breaking load of finished ultrafine steel wire; 500 kgf / mm 2 Bending amount in finished state (before SR treatment); diameter: 25 mm after SR treatment Bending amount: As shown in FIG. 2, the ultrafine steel wire 1 after the SR treatment is cut into a predetermined length, and evaluated by the maximum bending amount (d) at a linear length of 100 mm.
【００１８】図１からも明らかである様に、ＳＲ処理に
よる曲がり癖の矯正効果は温度および付加張力（鋼線の
破断荷重に対する比率）によって著しく変わり、付加張
力が２５％未満では、たとえ適正な温度域に加熱したと
しても十分な矯正効果は得られず、また適当な付加張力
を与えた場合でも温度が４００℃未満では満足のいく矯
正効果は得られない。但し４５０℃を超える高温になる
と材質が熱変質を起こして断線多発など問題が生じてく
るほか、線ぐせも非常に悪くなる傾向があるので、４５
０℃以下に抑えるのがよい。尚ＳＲ処理時の付加張力を
高め過ぎると断線が多発するので、付加張力は当該極細
鋼線の引張強度の５０％程度以下、より好ましくは４５
％程度以下に抑えるのがよい。As is apparent from FIG. 1, the effect of correcting the bending habit by the SR treatment changes significantly depending on the temperature and the applied tension (ratio to the breaking load of the steel wire). Even if it is heated to a temperature range, a sufficient correcting effect cannot be obtained, and even if an appropriate additional tension is applied, a satisfactory correcting effect cannot be obtained if the temperature is lower than 400 ° C. However, if the temperature becomes higher than 450 ° C., the material undergoes thermal deterioration, causing problems such as frequent disconnection, and the wire tends to be extremely poor.
It is better to keep the temperature below 0 ° C. If the applied tension during the SR process is too high, disconnection frequently occurs. Therefore, the applied tension is about 50% or less, more preferably 45% or less, of the tensile strength of the ultrafine steel wire.
% Or less.
【００１９】本発明は以上の様に構成されており、鋼材
の成分組成を特定すると共に、最終パテンティング処理
後の直径０．０１〜０．１２mmまで伸線加工する際の真
歪を４〜６と定め、且つ該伸線加工の後、当該極細鋼線
の破断荷重に対して２５％以上のバックテンションを付
加しつつ４００℃以上の温度でＳＲ処理を施すことによ
り、高強度で直線性に優れ且つ伸線加工で断線等を生じ
ることのない高性能の極細鋼線を提供し得ることになっ
た。The present invention is configured as described above, and specifies the component composition of the steel material and reduces the true strain when drawing to a diameter of 0.01 to 0.12 mm after the final patenting process by 4 to 4 mm. 6, and after the wire drawing, SR treatment is performed at a temperature of 400 ° C. or more while applying a back tension of 25% or more to the breaking load of the ultrafine steel wire, thereby achieving high strength and linearity. Thus, it has become possible to provide a high-performance ultrafine steel wire which has excellent performance and does not cause breakage or the like in wire drawing.
【００２０】[0020]
【実施例】次に実施例を挙げて本発明の構成および作用
効果をより具体的に説明するが、本発明はもとより下記
実施例によって制限を受けるものではない。 実施例１ 表１に示す化学成分の高炭素鋼素線材（直径５．５mm）
を直径３．０mmにまで乾式伸線した後パテンティング処
理し、更に乾式伸線とパテンティングを２回繰り返して
直径０．１〜１．０mmの鋼細線を得る。次いでブラスめ
っき（厚み４〜６μｍ）を施した後、湿式伸線法により
仕上り径０．０１〜０．１２mmの極細鋼線を得た。尚該
湿式伸線工程では伸線材にかかる真歪が４〜６の範囲に
収まる様にコントロールした。得られた各極細鋼線に、
電気ヒータを用いた間接加熱方式（オンライン）のＳＲ
処理（温度：４３０℃、付加張力：破断荷重の５０％）
を施して曲がりの矯正を行なった。各極細鋼線の引張強
度および曲がり半径を表１に併記する。EXAMPLES Next, the structure, operation and effect of the present invention will be described more specifically with reference to examples, but the present invention is not limited by the following examples. Example 1 High-carbon steel wire rod with a chemical composition shown in Table 1 (5.5 mm in diameter)
Is dry-drawn to a diameter of 3.0 mm, and then subjected to a patenting treatment. The dry-drawing and patenting are repeated twice to obtain a fine steel wire having a diameter of 0.1 to 1.0 mm. Next, after being subjected to brass plating (thickness of 4 to 6 μm), an ultrafine steel wire having a finished diameter of 0.01 to 0.12 mm was obtained by a wet drawing method. In the wet drawing process, the true strain applied to the drawn material was controlled so as to fall within a range of 4 to 6. For each obtained ultrafine steel wire,
Indirect heating (online) SR using electric heater
Treatment (temperature: 430 ° C, additional tension: 50% of breaking load)
To correct the bend. Table 1 also shows the tensile strength and bending radius of each ultrafine steel wire.
【００２１】[0021]
【表１】 [Table 1]
【００２２】表１においてNo. １〜４は本発明の規定要
件を全て満足する実施例であり、４００kgf/mm2 レベル
以上の優れた引張強度を有すると共にＳＲ処理後の曲が
り半径は極く僅かである。これに対しNo. ５〜６は化学
成分が本発明の規定要件を欠く比較例であり、最終パテ
ンティング処理後の湿式伸線条件やその後のＳＲ処理条
件は適正であるため曲がり寸法は十分に抑えられている
が、線材自身の靭・延性が不足するため、かなりの頻度
で断線事故が発生することが懸念される。In Table 1, Nos. 1 to 4 are examples satisfying all the requirements of the present invention, have excellent tensile strength of 400 kgf / mm 2 level or more, and have a very small bending radius after SR treatment. It is. On the other hand, Nos. 5 to 6 are comparative examples in which the chemical components lack the specified requirements of the present invention, and the bending dimensions are sufficient because the wet drawing conditions after the final patenting process and the SR processing conditions after that are appropriate. Although it is suppressed, there is a concern that wire breakage will occur quite frequently due to insufficient toughness and ductility of the wire itself.
【００２３】[0023]
【発明の効果】本発明は以上の様に構成されており、
０．０１〜０．１２mmの極細で且つ４００kgf/mm2 レベ
ル以上の高強度を有すると共に直線性にも優れ、断線等
を起こすことのない極細鋼線を提供し得ることになっ
た。The present invention is configured as described above.
Excellent linearity and having ultrafine with and 400 kgf / mm 2 or more levels of high intensity 0.01～0.12Mm, had to be provided with fine steel wire without causing disconnection or the like.
【図１】曲がり矯正のためのＳＲ処理温度と曲がり寸法
の関係を示すグラフである。FIG. 1 is a graph showing a relationship between an SR processing temperature for bending correction and a bending dimension.
【図２】曲がり寸法の測定基準を示す説明図である。FIG. 2 is an explanatory diagram showing a measurement standard of a bending dimension.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高田 進 兵庫県神戸市灘区灘浜東町２番地 株式 会社神戸製鋼所 神戸製鉄所内 (72)発明者 鈴木 満雄 兵庫県神戸市灘区灘浜東町２番地 株式 会社神戸製鋼所 神戸製鉄所内 (56)参考文献 特開 平４−158916（ＪＰ，Ａ) 特開 昭62−202030（ＪＰ，Ａ) 実開 昭53−73211（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) C21D 8/06,9/52 B21C 1/00 C22C 38/00,38/06 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Susumu Takada 2 Nadahama-Higashi-cho, Nada-ku, Kobe-shi, Hyogo Co., Ltd. Inside Kobe Steel, Ltd. Kobe Steel, Ltd. Kobe Steel, Ltd. (56) References JP-A-4-158916 (JP, A) JP-A-62-2202030 (JP, A) JP-A-53-73211 (JP, U) (58) Field (Int.Cl. 7 , DB name) C21D 8 / 06,9 / 52 B21C 1/00 C22C 38 / 00,38 / 06
Claims (1)
を表わす、以下同じ）、 Ｓｉ：０．１〜０．７％、 Ｍｎ：０．６％以下、 Ｐ：０．０２％以下、 Ｓ：０．０２％以下 Ａｌ：０．００３％以下、 残部：鉄および不可避不純物の要件を満たす高炭素鋼素
線にパテンティング処理および伸線加工を繰り返し、最
終パテンティング処理で直径０．１〜１．０mmの細線と
した後、真歪で４〜６の範囲で伸線加工を施すことによ
り０．０１〜０．１２mmの仕上げ線径を得た後、該極細
鋼線の破断荷重に対して２５％以上のバックテンション
を付与しつつ４００℃以上のＳＲ処理を施し、直線性を
高めることを特徴とする高強度極細鋼線の製法。C: 0.50% or more and less than 1.0% (% by weight)
Si: 0.1 to 0.7%, Mn: 0.6% or less, P: 0.02% or less, S: 0.02% or less Al: 0.003% or less, balance : A patenting process and a wire drawing process are repeatedly performed on a high carbon steel wire satisfying the requirements of iron and inevitable impurities, and a fine wire having a diameter of 0.1 to 1.0 mm is obtained by final patenting process, and then a true strain of 4 to 6 is obtained. After obtaining a finished wire diameter of 0.01 to 0.12 mm by performing wire drawing in the range of 400 ° C. or more while applying a back tension of 25% or more to the breaking load of the ultrafine steel wire. A method for producing a high-strength ultrafine steel wire, which is characterized by applying SR treatment to enhance linearity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15065693A JP3182984B2 (en) | 1993-06-22 | 1993-06-22 | Manufacturing method of high strength extra fine steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15065693A JP3182984B2 (en) | 1993-06-22 | 1993-06-22 | Manufacturing method of high strength extra fine steel wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH073338A JPH073338A (en) | 1995-01-06 |
| JP3182984B2 true JP3182984B2 (en) | 2001-07-03 |
Family
ID=15501622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15065693A Expired - Fee Related JP3182984B2 (en) | 1993-06-22 | 1993-06-22 | Manufacturing method of high strength extra fine steel wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3182984B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006342375A (en) * | 2005-06-07 | 2006-12-21 | Kanai Hiroaki | Method for manufacturing extra-fine polishing wire |
| JPWO2010140521A1 (en) | 2009-06-05 | 2012-11-15 | 不二商事株式会社 | Tire bead wire and manufacturing method thereof |
-
1993
- 1993-06-22 JP JP15065693A patent/JP3182984B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH073338A (en) | 1995-01-06 |
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