JPH0349642B2 - - Google Patents
Info
- Publication number
- JPH0349642B2 JPH0349642B2 JP60004928A JP492885A JPH0349642B2 JP H0349642 B2 JPH0349642 B2 JP H0349642B2 JP 60004928 A JP60004928 A JP 60004928A JP 492885 A JP492885 A JP 492885A JP H0349642 B2 JPH0349642 B2 JP H0349642B2
- Authority
- JP
- Japan
- Prior art keywords
- steel wire
- wire
- wire drawing
- shot peening
- properties
- 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 - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 238000005452 bending Methods 0.000 claims description 28
- 238000005491 wire drawing Methods 0.000 claims description 25
- 238000005480 shot peening Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 5
- 230000003252 repetitive effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006240 drawn fiber Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008774 maternal effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000035935 pregnancy Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Metal Extraction Processes (AREA)
Description
（産業上の利用分野）
本発明は捻回特性の優れた高張力鋼線のの製造
方法に関するものである。
（従来の技術とその問題点）
捻回特性は鋼線の靭性パラメータとして最重要
である。製造工程で、あるいは使用時に鋼線が局
部的あるいは全体的にねじられる機会は多い。そ
れ故、捻回特性が靭性パラメータとして汎用され
るのである。また試験方法も簡便であり、JIS
G3522のピアノ線、G3521の硬鋼線には要求捻回
特性が明記されている。
しかし、鋼線の引張強さが高くなればなるほど
良好な捻回特性を得ることはむずかしくなる。
捻回特性を改善する方法としては鋼中の不純物
Ｐ，Ｓ，Ｎ，Ｏを低減化することが知られてい
る。例えば特公昭54−27292号公報に示されてい
るように、Ｎを低減し、Ｎによる時効を防止して
冷間加工性および機械的性質、特に捻回値を向上
する方法がある。これは、T.Nを少なくすること
により固溶Ｎを減少させることで捻回特性を向上
させる方法であり、高純度化効果を利用した方法
の１つである。
しかし、工業的には高純度化を行なつてもＰ，
Ｓ，Ｎ，Ｏを完全になくすことは不可能であり、
限界がある。また、引張強さレベルが高くなれば
なるほど母性特性ものものの影響が大きくなり、
高純度化による化学的作用のみで捻回特性を改善
することは困難になる。
最近は引張強さ200Kg／mm2以上まで鋼線の高張
力化が図られているが、捻回特性については従来
並みのものが要求されている。このような背景か
ら、捻回特性の優れた高張力鋼線の製造方法の開
発が急務となつている。
従来、捻回特性改善に対する化学的作用に関す
る研究は多いが、物理的作用に関するものは皆無
である。
本発明は捻回特性の優れた高張力鋼線の製造方
法に関するものであるが、従来のような高純度化
による化学的作用を利用したものではなく、物理
的作用で改善するものであり、物理的作用により
母相特性そのものを改善し、捻回特性の優れた高
張力鋼線を得るのである。
（問題点を解決するための手段、作用）
本発明の要旨は、伸線加工を行うに際して、減
面率30％以上のところで伸線ダイスと捲取ドラム
の間で連続ロールに鋼線を密着させる形で歪み５
％以上の繰返し曲げ加工を３回以上繰返すことを
特徴とする捻回特性の優れた高張力鋼線の製造方
法、および、伸線加工を行うに際して、減面率30
％以上のところで伸線ダイスと捲取ドラムの間で
連続ロールに鋼線を密着させる形で歪み５％以上
の繰返し曲げ加工を３回以上繰返し、シヨツトピ
ーニング加工を付加することを特徴とする捻回特
性の優れた高張力鋼線の製造方法である。
高張力鋼線を製造する際、パテンテイング後伸
線加工による加工硬化を利用して目標とする引張
強さを得る。伸線加工時、軸方向強度は伸線量に
比例して増加するが半径方向強度の増加は少な
い。従つて、高張力鋼線になればなるほど軸方向
強度と半径方向強度とのバランスがくずれてい
る。このような高張力鋼線の捻回試験を行うと、
半径方向強度が不足するため伸線繊維組織に平行
に縦割れが発生し、捻回値が小さくなるだけでな
く縦割れが発生しやすくなることがわかつた。そ
れ故、母相特性そのものを改善しないと捻回特性
の優れた高張力鋼線の製造はむずかしいことにな
る。
そこで本発明者は物理的作用により直接的に母
相特性を改善する方法を発明した。つまり、繰返
し曲げまたは繰返し曲げとシヨツトピーニングに
よる物理的作用を利用したのであり、半径方向強
度を改善するため、減面率30％以上のところで繰
返し曲げまたは返し曲げとシヨツトピーニングを
付加するのである。なお、減面率は伸線前の鋼線
を直径をd0、伸線後の直径をd1とした場合、（１
−d2 1／d2 0）×100％で定義される。
減面率30％以上に限定したのは下記理由によ
る。
鋼線の伸線加工において通常１ダイスでの減面
は30％未満である。一方、前述のの軸方向強度と
半径方向強度のバランスがくずれ始めるのは２パ
ス目以後である。それ故、減面率30％以上に限定
したのであり、30％未満での繰返し曲げは意味が
ない。
鋼線の曲げ歪みを５％以上かつ３回以上に限定
した理由は次の通りである。なお、鋼線曲げ歪み
は、鋼線の直径をｄ、曲げ加工のロール径をＤと
した場合、ｄ／Ｄ×100％で定義する。
数多くの実験結果より歪み５％未満であると捻
回特性は改善されなかつた。これは半径方向に有
効な力が作用しないためである。また、曲げ加工
の繰返しが２回以下であると捻回値はわずかに向
上するが、半径方向強化が鋼線のの長手方向に均
一におこらないためにばらつきが大きく、大きな
改善効果が得られず、それ故３回以上必要であ
る。
捻回特性の優れた高張力鋼線を製造するために
は母性特性そのものを改善する必要があり、減面
率30％以上のところでかつ伸線ダイスと捲取ドラ
ムの間で歪み５％以上の曲げ加工を３回以上繰返
すことが必要なのである。
この繰返し曲げを行つても表面性状は良好に維
持されている。
また、亜鉛メツキ鋼線、伸線加工後に通常のブ
ルーイング処理よりもさらに高温長時間の加熱処
理が行なわれる場合においては捻回特性の劣化が
大きいのであるが、このような場合には曲げ加工
と同時にシヨツトピーニングを行なうことによつ
て半径方向強度を一段と向上させることができ
る。シヨツトピーニングは半径方向の強度の改善
に直接的に作用するので捻回値の改善に対して有
効である。しかし、シヨツトピーニング単独で改
善効果を出すためには極めて強力なシヨツトピー
ニングをすることが必要であり、そのため鋼線表
面の凹凸がひどくなり、この凹凸が10μを越え、
潤滑皮膜を破つてその後の伸線で断線するため採
用できない。
鋼線の曲げ加工と同時にシヨツトピーニング加
工を行なうことにより捻回特性改善効果はさらに
大きくなる。
シヨツトピーニング効果はシヨツト強さに比例
するので、鋼線表面に1μ以上の凹みがつく程度
の強さは必要であるが、鋼線表面の凹凸がはげし
くなることおよび潤滑皮膜をはぎとることにより
表面粗さは最高でも10μ程度に抑える必要があ
る。
次に、実施例を用いて本発明の効果を説明す
る。
（実施例）
Ｃ：0.95％、Si：1.0％、Mn：0.5％、Cr：0.5
％、Ｐ：0.020％、Ｓ：0.020％、Ｎ：0.0050％、
Ｏ：0.0020％の過共析低合金鋼5.5mmφ線材を使
用し、950℃−620℃鉛パテンテイング後酸洗、リ
ン酸塩被覆処理し、2.8mmφまで伸線を行なつた。
パテンテイング材の引張強さは158Kg／mm2であつ
た。
パススケジユールは8φ→7φ（減面率23％）→
6φ（44％）→5.5φ（53％）→5φ（61％）→4.4φ（70
％）3.9φ（76％）→3.5φ（81％）→3.1φ（85％）→
2.8φ（88％）とした。
伸線には第１図に示すような繰返し曲げ装置４
とシヨツトピーニング装置５がついた単頭伸線機
を使用し、伸線速度は10ｍ／minとした。繰返し
曲げ装置４のロール径は線径によつて変化させる
ためカセツト方式で取替え、シヨツトピーニング
装置は同じものを使用し、シヨツト速度は線径が
細くなるに従い増加させた。
アンコイラー１より鋼線２をくり出し、ダイス
３で伸線を行い、伸線機６との間に繰返し曲げ装
置４とシヨツトピーニング装置５を配置した。繰
返し曲げ装置４のロール数は５個のものを用い、
ロール径は線径によつて変化させた。
シヨツトは0.3mmφのスチールシヨツトを使用
し、線径が細くなるに従いシヨツト速度を増加さ
せたが、シヨツトピーニング装置の羽根車の回転
数を2000〜8000rpmに変化させることで対応し
た。4000〜8000rpmはシヨツトピーニング付加の
みの場合（Ｌ，Ｍ）使用した。
第１表に2.8mmφ鋼線の特性値と亜鉛めつき鋼
線を想定して行なつた450℃30秒ブルーイング材
の特性値を示す。
(Industrial Application Field) The present invention relates to a method for manufacturing high-tensile steel wire with excellent twisting properties. (Conventional technology and its problems) Torsion characteristics are the most important toughness parameter of steel wire. There are many opportunities for steel wire to be twisted locally or in its entirety during the manufacturing process or during use. Therefore, torsional properties are commonly used as toughness parameters. In addition, the test method is simple and JIS
Required twisting characteristics are specified for G3522 piano wire and G3521 hard steel wire. However, the higher the tensile strength of the steel wire, the more difficult it becomes to obtain good twisting properties. As a method for improving twisting characteristics, it is known to reduce impurities P, S, N, and O in steel. For example, as shown in Japanese Patent Publication No. 54-27292, there is a method of reducing N and preventing aging due to N to improve cold workability and mechanical properties, especially torsion value. This is a method of improving twisting properties by reducing solid solution N by reducing TN, and is one of the methods that takes advantage of the high purification effect. However, even if high purity is achieved industrially, P,
It is impossible to completely eliminate S, N, and O.
There is a limit. Also, the higher the tensile strength level, the greater the influence of maternal properties,
It becomes difficult to improve the twisting properties only through chemical action through high purification. Recently, efforts have been made to increase the tensile strength of steel wires to over 200 kg/mm 2 , but twisting properties are required to be on par with conventional wires. Against this background, there is an urgent need to develop a method for manufacturing high-tensile steel wire with excellent twisting properties. Although there have been many studies on chemical effects on improving twisting characteristics, there has been no research on physical effects. The present invention relates to a method for manufacturing high-tensile steel wire with excellent twisting properties, but the improvement is achieved through physical action rather than using chemical action through high purification as in the past. The physical properties of the matrix itself are improved, resulting in a high-strength steel wire with excellent twisting properties. (Means and effects for solving the problems) The gist of the present invention is that when performing wire drawing, the steel wire is tightly attached to a continuous roll between a wire drawing die and a winding drum at a reduction in area of 30% or more. Distortion in the form of 5
A method for manufacturing a high-tensile steel wire with excellent twisting properties, characterized by repeating repeated bending of 30% or more three times or more, and a method for producing a high-tensile steel wire with an area reduction of 30% during wire drawing.
% or more, the steel wire is brought into close contact with a continuous roll between a wire drawing die and a winding drum, and repeated bending processing with a strain of 5% or more is repeated three or more times, and shot peening processing is added. This is a method for producing high-tensile steel wire with excellent twisting properties. When manufacturing high-tensile steel wire, the target tensile strength is obtained by utilizing work hardening through wire drawing after patenting. During wire drawing, the axial strength increases in proportion to the amount of wire drawing, but the radial strength increases little. Therefore, the higher the tensile strength steel wire is used, the more the balance between axial strength and radial strength is lost. When such a twisting test is performed on high-tensile steel wire,
It was found that due to the lack of strength in the radial direction, longitudinal cracks occur parallel to the drawn fiber structure, which not only reduces the torsion value but also makes longitudinal cracks more likely to occur. Therefore, unless the matrix properties themselves are improved, it will be difficult to produce high-tensile steel wires with excellent twisting properties. Therefore, the present inventors invented a method for directly improving the matrix properties through physical action. In other words, the physical effects of repeated bending or repeated bending and shot peening are utilized.In order to improve the radial strength, repeated bending or repeated bending and shot peening are added at a reduction rate of 30% or more. be. In addition, the area reduction rate is ( 1
−d 2 1 /d 2 0 )×100%. The reason why the area reduction rate was limited to 30% or more is as follows. In wire drawing of steel wire, the area reduction in one die is usually less than 30%. On the other hand, it is after the second pass that the aforementioned balance between the axial strength and the radial strength begins to collapse. Therefore, the area reduction rate was limited to 30% or more, and repeated bending with less than 30% is meaningless. The reason why the bending strain of the steel wire was limited to 5% or more and 3 times or more is as follows. Note that the steel wire bending strain is defined as d/D×100%, where d is the diameter of the steel wire and D is the diameter of the roll for bending. Numerous experimental results show that the twisting characteristics were not improved when the strain was less than 5%. This is because no effective force acts in the radial direction. Furthermore, if the bending process is repeated less than two times, the torsion value improves slightly, but since the radial strengthening does not occur uniformly in the longitudinal direction of the steel wire, the variation is large, and a large improvement effect cannot be obtained. Therefore, three or more times are necessary. In order to produce high-strength steel wire with excellent twisting properties, it is necessary to improve the maternity properties themselves. It is necessary to repeat the bending process three or more times. Even after repeated bending, the surface quality remains good. Furthermore, in cases where galvanized steel wire is subjected to heat treatment for a longer period of time at a higher temperature than normal bluing treatment after wire drawing, the twisting properties deteriorate significantly; By simultaneously performing shot peening, the radial strength can be further improved. Shot peening has a direct effect on improving the strength in the radial direction, so it is effective in improving the torsion value. However, in order to produce an improvement effect with shot peening alone, it is necessary to perform extremely strong shot peening, which increases the unevenness of the steel wire surface and causes the unevenness to exceed 10 μm.
It cannot be used because it breaks the lubricating film and causes wire breakage during subsequent wire drawing. By performing shot peening at the same time as bending the steel wire, the effect of improving twisting properties becomes even greater. The shot peening effect is proportional to the shot strength, so the shot peening must be strong enough to create a dent of 1μ or more on the steel wire surface. The roughness must be kept to around 10μ at most. Next, the effects of the present invention will be explained using examples. (Example) C: 0.95%, Si: 1.0%, Mn: 0.5%, Cr: 0.5
%, P: 0.020%, S: 0.020%, N: 0.0050%,
O: 0.0020% hypereutectoid low alloy steel 5.5 mmφ wire rod was subjected to lead patenting at 950° C. to 620° C., then pickled and phosphate coated, and wire drawn to 2.8 mmφ.
The tensile strength of the patenting material was 158 Kg/mm 2 . Pass schedule is 8φ → 7φ (area reduction rate 23%) →
6φ (44%) → 5.5φ (53%) → 5φ (61%) → 4.4φ (70
%) 3.9φ (76%) → 3.5φ (81%) → 3.1φ (85%) →
It was set to 2.8φ (88%). For wire drawing, a repetitive bending device 4 as shown in Fig. 1 is used.
A single-head wire drawing machine equipped with a shot peening device 5 was used, and the wire drawing speed was 10 m/min. The roll diameter of the repetitive bending device 4 was changed in accordance with the wire diameter, so it was replaced by a cassette system, the same shot peening device was used, and the shot speed was increased as the wire diameter became thinner. A steel wire 2 was drawn out from an uncoiler 1 and drawn with a die 3, and a repetitive bending device 4 and a shot peening device 5 were disposed between the wire drawing machine 6 and the wire drawing machine 6. The number of rolls of the repetitive bending device 4 is 5,
The roll diameter was varied depending on the wire diameter. A steel shot with a diameter of 0.3 mm was used, and the shot speed was increased as the wire diameter became thinner, but this was achieved by changing the rotation speed of the impeller of the shot peening device from 2000 to 8000 rpm. 4000 to 8000 rpm was used when only shot peening was added (L, M). Table 1 shows the characteristic values of a 2.8 mmφ steel wire and the characteristic values of a material blued at 450°C for 30 seconds assuming a galvanized steel wire.
【表】
Ａ〜Ｇは本発明法を採用した実施例であり、Ｈ
〜Ｍは比較例である。捻回破面が異常なものはす
べて縦割れが見られた。実施例はいずれも捻回値
が20回以上であり、破面も正常である。
Ａ〜Ｅが繰返し曲げのみのものである。2.8mm
φ伸線材において引張強さ250Kg／mm2以上でかつ
捻回値が20回以上、正常捻回破面になつている。
450℃30秒ブルーイング材では引張強さが239〜
245Kg／mm2で加熱により若干低下する。捻回値も
低下するが、20回以上の水準を維持している。
2.8mmφサイズでは捻回値が20回以上で正常捻
回破面であれば靭性は十分である。また、表面粗
さは1μ以下であり良好である。
Ｆ，Ｇが繰返し曲げとシヨツトピーニングを付
加したものである。Ａ〜Ｅより捻回値が高く、30
回以上である。但し表面粗さは3.0〜5.5μである。
Ｆ，Ｇは450℃30秒ブルーイング後も捻回値が25
回以上と極めて高水準で、引張強さも240Kg／mm2
以上であり、メツキ鋼線用途などには適している
と考えられる。
Ｈ〜Ｍは比較例である。
Ｈは通常の伸線を行なつたものであり、引張強
さは250Kg／mm2ね以上になるが2.8mmφ線材段階で
捻回値が13回と低く、かつ異常波面である。
Ｉは繰返し曲げを３回行なつているが歪みが４
％なので有効な力が作用せず、Ｈとほとんど同レ
ベルの捻回特性である。
Ｊは曲げ加工歪10％であるが繰返し曲げが２回
であり、捻回特性もばらつき、20回以上かつ正常
捻回破面という効果は得られていない。
Ｋは減面率30％未満での繰返し曲げと減面率30
％以上での１回の繰返し曲げなので、繰返し曲げ
による効果はほとんどないが、減面率30％以上の
シヨツトピーニングが１回付加されているので、
捻回特性は若干改善される程度である。
Ｌは減面率30％以上のところで２回シヨツトピ
ーニングを実施しているためＫよりシヨツトピー
ニングの効果が出ている。しかし異常捻回破面で
あり、最終伸線での強力シヨツトピーニングのた
め凹凸がはげしい。
Ｍは伸線初期の強力なシヨツトピーニングの付
与により潤滑皮膜が破れ、伸線途中で断線したも
のである。
以上述べたように、本発明法は捻回特性改善に
対して極めて有効である。
（発明の効果）
本発明は、鋼中の不純物元素の低減ではなく、
伸線加工時の繰返し曲げ加工、また捻回値25回以
上が要求される場合は、繰返し曲げ加工とシヨツ
トピーニングの付加により捻回特性の優れた高張
力鋼線をを製造することができ、ハード設備が簡
単かつ処理コストが低い点において工業的意義は
大きい。鋼線の高張力化が今後ますます進むと考
えられるので、本発明の有用性はますます大きく
なると推測される。[Table] A to G are examples in which the method of the present invention was adopted, and H
-M are comparative examples. Vertical cracks were observed in all specimens with abnormal torsional fracture surfaces. In all of the examples, the twist value was 20 times or more, and the fracture surface was normal. A to E are those that were only subjected to repeated bending. 2.8mm
φ wire drawn material has a tensile strength of 250Kg/ mm2 or more, a twist value of 20 times or more, and a normal twist fracture surface.
Tensile strength of blued material at 450℃ for 30 seconds is 239~
It is 245Kg/mm 2 and decreases slightly with heating. The twist value also decreases, but remains at a level of 20 times or more. For the 2.8 mmφ size, the toughness is sufficient if the twist value is 20 times or more and the fracture surface is normal. Moreover, the surface roughness is 1μ or less, which is good. F and G are the results of repeated bending and shot peening. The torsion value is higher than A to E, 30
More than once. However, the surface roughness is 3.0 to 5.5μ.
F and G have a twist value of 25 even after bluing at 450℃ for 30 seconds.
The tensile strength is 240Kg/ mm2 .
Based on the above, it is considered to be suitable for applications such as plated steel wire. HM are comparative examples. H is a wire drawn after normal wire drawing, and has a tensile strength of 250 Kg/ mm2 or more, but the twist value is as low as 13 turns at the 2.8 mmφ wire stage, and the wave front is abnormal. I is repeatedly bent 3 times, but the distortion is 4.
%, no effective force is applied, and the twisting characteristics are almost the same as H. J has a bending strain of 10%, but the repeated bending is 2 times, and the twisting characteristics are also variable, and the effect of a normal twisting fracture surface has not been obtained since it was repeated 20 times or more. K is repeated bending with area reduction rate less than 30% and area reduction rate 30
% or more, so there is almost no effect from repeated bending, but since shot peening with an area reduction of 30% or more is added once,
The twisting characteristics are only slightly improved. L was shot peened twice when the area reduction rate was 30% or more, so the shot peening was more effective than K. However, the fracture surface is abnormally twisted, and is extremely uneven due to the strong shot peening during the final wire drawing. In case M, the lubricating film was torn due to the application of strong shot peening at the initial stage of wire drawing, and the wire was broken during wire drawing. As described above, the method of the present invention is extremely effective in improving twisting characteristics. (Effects of the invention) The present invention does not aim to reduce impurity elements in steel;
If repeated bending during wire drawing or a twist value of 25 times or more is required, high-strength steel wire with excellent twisting properties can be manufactured by adding repeated bending and shot peening. It has great industrial significance in that the hardware equipment is simple and the processing cost is low. Since it is thought that the tensile strength of steel wires will continue to increase in the future, it is assumed that the usefulness of the present invention will become even greater.
第１図は本発明を実施する装置の一例を示す図
である。
１…アンコイラー、２…鋼線、３…ダイス、４
…繰返し曲げ装置、５…シヨツトピーニング装
置、６…伸線機。
FIG. 1 is a diagram showing an example of an apparatus for implementing the present invention. 1...Uncoiler, 2...Steel wire, 3...Dice, 4
...Repetitive bending device, 5...Shot peening device, 6...Wire drawing machine.
Claims (1)
ところで伸線ダイスと捲取ドラムの間で連続ロー
ルに鋼線を密着させる形で歪み５％以上の繰返し
曲げ加工を３回以上繰返すことを特徴とする捻回
特性の優れた高張力鋼線の製造方法。 ２ 伸線加工を行うに際して、減面率30％以上の
ところで伸線ダイスと捲取ドラムの間で連続ロー
ルに鋼線を密着させる形で歪み５％以上の繰返し
曲げ加工を３回以上繰返し、シヨツトピーニング
加工を付加することを特徴とする捻回特性の優れ
た高張力鋼線の製造方法。[Claims] 1. During wire drawing, repeated bending with a strain of 5% or more is carried out in such a way that the steel wire is brought into close contact with a continuous roll between a wire drawing die and a winding drum at an area reduction rate of 30% or more. A method for producing a high-tensile steel wire with excellent twisting properties, characterized by repeating the steps three or more times. 2. When performing the wire drawing process, the steel wire is repeatedly bent three times or more with a strain of 5% or more while keeping the steel wire in close contact with a continuous roll between the wire drawing die and the winding drum at an area reduction rate of 30% or more. A method for manufacturing a high-tensile steel wire with excellent twisting properties, characterized by adding shot peening processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP492885A JPS61165219A (en) | 1985-01-17 | 1985-01-17 | Production of high tensile steel wire excellent in twisting property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP492885A JPS61165219A (en) | 1985-01-17 | 1985-01-17 | Production of high tensile steel wire excellent in twisting property |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61165219A JPS61165219A (en) | 1986-07-25 |
| JPH0349642B2 true JPH0349642B2 (en) | 1991-07-30 |
Family
ID=11597253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP492885A Granted JPS61165219A (en) | 1985-01-17 | 1985-01-17 | Production of high tensile steel wire excellent in twisting property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61165219A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63179017A (en) * | 1987-01-21 | 1988-07-23 | Nippon Steel Corp | Manufacture of extra high tension steel wire having superior ductility |
| JPH089734B2 (en) * | 1987-01-21 | 1996-01-31 | 新日本製鐵株式会社 | Method for producing ultra high strength steel wire with excellent ductility |
| JP2582629B2 (en) * | 1988-08-31 | 1997-02-19 | 三菱電機株式会社 | Assist gas supply device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4876768A (en) * | 1972-01-19 | 1973-10-16 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544509Y2 (en) * | 1973-10-24 | 1979-02-27 |
-
1985
- 1985-01-17 JP JP492885A patent/JPS61165219A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4876768A (en) * | 1972-01-19 | 1973-10-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61165219A (en) | 1986-07-25 |
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