JPH06235023A - Production of high strength galvanized steel wire for acsr excellent in corrosion resistance - Google Patents
Production of high strength galvanized steel wire for acsr excellent in corrosion resistanceInfo
- Publication number
- JPH06235023A JPH06235023A JP2150193A JP2150193A JPH06235023A JP H06235023 A JPH06235023 A JP H06235023A JP 2150193 A JP2150193 A JP 2150193A JP 2150193 A JP2150193 A JP 2150193A JP H06235023 A JPH06235023 A JP H06235023A
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- JP
- Japan
- Prior art keywords
- steel wire
- corrosion resistance
- wire
- acsr
- plating
- 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.)
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- Coating With Molten Metal (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、送電線用ケーブルのＡ
ｌ導線を機械的に補強するために使用される鋼撚線の素
線（ＡＣＳＲ鋼線）の製造方法に関し、さらに詳しく
は、腐食環境で使用される引張強さ２４０kgf/mm2 以上
のＡＣＳＲ用高強度Ｚｎめっき鋼線の製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable for power transmission line A.
l A method for manufacturing strands of steel stranded wire (ACSR steel wire) used to mechanically reinforce the conductor, more specifically, for ACSR with a tensile strength of 240 kgf / mm 2 or more used in a corrosive environment The present invention relates to a method for manufacturing a high-strength Zn-plated steel wire.
【０００２】[0002]
【従来の技術】ＡＣＳＲ用Ｚｎめっき鋼線は、通常、Ｊ
ＩＳ Ｇ３５０６に規定される硬鋼線材にパテンティン
グを行なったのち伸線し、その後、溶融Ｚｎめっきを施
す方法で製造される。しかし、近年、送電用ケーブルの
長径間化、大容量化、コンパクト化、および使用環境の
苛酷化に伴ない、ＡＣＳＲ鋼線には高強度化に加えて耐
食性や耐熱性の向上が要望されるようになった。2. Description of the Related Art Zn-plated steel wire for ACSR is usually manufactured by J
It is manufactured by a method in which a hard steel wire material specified in IS G3506 is patented, drawn, and then hot-dip Zn plated. However, in recent years, along with the long-span, large-capacity, compact, and harsh operating environment of power transmission cables, the ACSR steel wire is required to have high strength as well as improved corrosion resistance and heat resistance. It became so.
【０００３】これに対処するため、特開昭６３−１８６
８５２号公報には、耐熱性の良好な２mmのＡＣＳＲ鋼線
に関する技術が開示されている、すなわちＣ，Ｓｉ，Ｍ
ｎ，Ｃｒ以外にＲＥＭ，Ｃａ，Ｍｇ，Ｂａ，Ｓｒを添加
し、引張強さ２００kgf/mm2以上の高張力鋼線が得られ
るとしている。しかし、耐食性に関しては、伸線後、通
常の溶融Ｚｎめっきを行なうことが記載されているに過
ぎない。To address this, Japanese Patent Laid-Open No. 63-186
Japanese Patent No. 852 discloses a technique relating to a 2 mm ACSR steel wire having good heat resistance, that is, C, Si, M.
In addition to n and Cr, REM, Ca, Mg, Ba, and Sr are added to obtain a high-strength steel wire having a tensile strength of 200 kgf / mm 2 or more. However, regarding the corrosion resistance, it is merely described that ordinary hot-dip Zn plating is performed after wire drawing.
【０００４】一方、鋼線の耐食性を向上させるために、
従来のＺｎめっきに代り各種のＺｎ−Ａｌ合金めっきが
開発されている。たとえば、特公昭５５−２６７０２号
公報にはＺｎ−Ａｌ、特公昭５４−３３２２３号公報に
はＺｎ−Ａｌ−Ｍｇ、特表昭５７−５００４７５号公報
にはＺｎ−Ａｌ−ミッシュメタル、特開昭５６−１１２
４５２号公報にはＺｎ−Ａｌ−Ｎａなどが公表されてい
る。これらは、いずれも従来の溶融Ｚｎめっき法と同
様、溶融状態（約４５０℃）の合金めっき浴中に鋼線を
浸漬することによりめっきする方法である。On the other hand, in order to improve the corrosion resistance of the steel wire,
Various Zn-Al alloy platings have been developed in place of conventional Zn plating. For example, Japanese Patent Publication No. 55-26702 discloses Zn-Al, Japanese Patent Publication No. 54-33223 discloses Zn-Al-Mg, and Japanese Patent Publication No. 57-500475 discloses Zn-Al-Misch metal. 56-112
No. 452 discloses Zn-Al-Na and the like. These are all methods of plating by dipping a steel wire in a molten alloy plating bath (about 450 ° C.) as in the conventional hot-dip Zn plating method.
【０００５】上記、特開昭６３−１８６８５２号公報を
はじめとして、通常のＡＣＳＲ鋼線は伸線後に溶融Ｚｎ
めっき（約４５０℃）工程が入っているため、伸線に伴
なう加工硬化の多くが減殺されるという問題点を有して
いた。これは、高強度化をはかるうえの大きな障害であ
るため、従来、Ｚｎめっき後、さらに伸線加工を付加す
ること（いわゆるアフタードロー）が考えられた。この
場合、製品の伸びを確保するためには、アフタードロー
後３００℃以上でブルーイングする必要がある。しか
し、Ｚｎめっき鋼線を２００℃以上の高温にさらすこと
は、脆いＺｎ−Ｆｅ合金層を発達させ、その結果、めっ
き密着性および耐食性が著しく劣化するため、この方法
は実際には採用されていない。Starting from the above-mentioned Japanese Patent Laid-Open No. 63-186852, ordinary ACSR steel wire is melted with Zn after drawing.
Since the plating (about 450 ° C.) step is included, there is a problem that most of work hardening associated with wire drawing is reduced. Since this is a great obstacle to achieving high strength, it has been conventionally considered to add wire drawing after Zn plating (so-called afterdraw). In this case, in order to secure the elongation of the product, it is necessary to perform bluing at 300 ° C. or higher after afterdrawing. However, exposing the Zn-plated steel wire to a high temperature of 200 ° C. or higher develops a brittle Zn—Fe alloy layer, and as a result, the plating adhesion and corrosion resistance are significantly deteriorated, so this method is actually adopted. Absent.
【０００６】[0006]
【発明が解決しようとする課題】以上述べたように、従
来の技術では、耐食性にすぐれたＡＣＳＲ用高強度Ｚｎ
めっき鋼線を製造することは不可能であった。本発明の
目的は、上記従来法の問題点を解決することにより、従
来より高強度かつ高耐食性を有するＡＣＳＲ用Ｚｎめっ
き鋼線の製造方法を提供することにある。As described above, according to the prior art, high strength Zn for ACSR having excellent corrosion resistance is obtained.
It was not possible to produce galvanized steel wire. An object of the present invention is to provide a method for producing a Zn-plated steel wire for ACSR having higher strength and higher corrosion resistance than conventional ones by solving the problems of the above conventional method.
【０００７】[0007]
【課題を解決するための手段】本発明は、重量比でＣ：
０．７５〜１．０％、Ｓｉ：０．１５〜１．３％、Ｍ
ｎ：０．３〜１．０％、必要に応じて、Ｃｒ：０．１〜
１．０％、Ｖ：０．０２〜０．３０％の１種ないし２
種、さらに、Ａｌ，Ｔｉの１種ないし２種をそれぞれ
０．１％以下含有し、残余をＦｅおよび不可避的不純物
からなる鋼線を、重量比でＡｌ：２〜１２％、Ｓｉ：
０．０１〜０．１２％を含有する合金浴を用いて溶融め
っきしたのち、総減面率２０〜８０％で伸線し、その
後、３００〜３７０℃でブルーイングすることを特徴と
する耐食性に優れたＡＣＳＲ用高強度亜鉛めっき鋼線の
製造方法である。The present invention provides a weight ratio of C:
0.75-1.0%, Si: 0.15-1.3%, M
n: 0.3 to 1.0%, if necessary, Cr: 0.1 to
1.0%, V: 0.02 to 0.30% of 1 to 2
Steel wire containing 0.1% or less of each of Al, Ti and 1 or 2 of Al and Ti, and the balance of Fe and unavoidable impurities, Al: 2 to 12% by weight, Si:
Corrosion resistance characterized by hot-dip plating using an alloy bath containing 0.01 to 0.12%, wire drawing at a total surface reduction rate of 20 to 80%, and then bluing at 300 to 370 ° C. It is a method for producing a high-strength galvanized steel wire for ACSR excellent in heat resistance.
【０００８】以下に、本発明を詳細に説明する。はじめ
に、本発明の成分限定理由について説明する。Ｃは強度
を上げるための有効かつ経済的な元素であり、本発明の
最も重要な元素の一つである。Ｃ含有率を上げるに伴な
い、パテンティング後の強度ならびに伸線時の加工硬化
量が増大する。従って、伸線加工により高強度鋼線を得
るためには、Ｃ含有率は高い方が有利であり、本発明で
は、０．７５％以上とする。一方、Ｃ含有率が１．０％
を超えた場合、初析セメンタイトの発生防止に特別な配
慮を要するため、Ｃ含有率の上限は１．０％とする。The present invention will be described in detail below. First, the reasons for limiting the components of the present invention will be described. C is an effective and economical element for increasing strength and is one of the most important elements of the present invention. As the C content increases, the strength after patenting and the amount of work hardening during wire drawing increase. Therefore, in order to obtain a high-strength steel wire by wire drawing, a higher C content is advantageous, and in the present invention, it is 0.75% or more. On the other hand, the C content is 1.0%
If it exceeds 1.0, special consideration is required to prevent the occurrence of pro-eutectoid cementite, so the upper limit of the C content is 1.0%.
【０００９】Ｓｉは、脱酸剤として０．１５％以上添加
する。一方、Ｓｉは合金元素としてフェライトに固溶
し、顕著な固溶強化作用を示す。また、フェライト中の
Ｓｉは伸線後の溶融亜鉛めっきやブルーイング工程にお
ける鋼線の強度低下を低減させる効果を有するため、高
強度鋼線の製造には不可欠な元素である。しかし、１．
３％を超えると、めっき後の伸線工程（アフタードロ
ー）において鋼線の延性が低下するため、１．３％を上
限とする。Si is added as a deoxidizer in an amount of 0.15% or more. On the other hand, Si dissolves in ferrite as an alloying element and exhibits a remarkable solid solution strengthening action. Further, Si in the ferrite has an effect of reducing the strength reduction of the steel wire in the hot dip galvanizing after the wire drawing and the bluing process, and is an essential element for the production of the high strength steel wire. However, 1.
If it exceeds 3%, the ductility of the steel wire decreases in the wire drawing step (afterdrawing) after plating, so 1.3% is made the upper limit.
【００１０】Ｍｎも脱酸剤として０．３％以上添加す
る。また、Ｍｎは焼入性向上効果が大きいため、線径が
大きい場合には、Ｍｎ含有率を上げることにより、断面
内の均一性を高めることが可能であり、伸線後の鋼線の
延性向上に有効である。しかし、１．０％を超えると中
心偏析部にマルテンサイトが生成し、伸線加工性が劣化
するため１．０％を上限とする。Mn is also added as a deoxidizing agent in an amount of 0.3% or more. Further, since Mn has a great effect of improving the hardenability, it is possible to improve the uniformity in the cross section by increasing the Mn content ratio when the wire diameter is large, and the ductility of the steel wire after drawing is increased. It is effective for improvement. However, if it exceeds 1.0%, martensite is generated in the center segregated portion and the wire drawability is deteriorated, so 1.0% is made the upper limit.
【００１１】Ｃｒは、パーライトのラメラー間隔を低減
し、線材の強度と伸線加工性を向上させるため、必要に
応じて０．１％以上添加する。０．１％未満ではその効
果が十分でなく、一方、１．０％を超えると変態に要す
る時間が長くなり、設備の大型化、あるいは、生産能率
の低下をきたすため、１．０％を上限とする。In order to reduce the lamellar spacing of pearlite and improve the strength and wire drawability of the wire, Cr is added in an amount of 0.1% or more, if necessary. If it is less than 0.1%, the effect is not sufficient. On the other hand, if it exceeds 1.0%, the time required for transformation becomes long, the equipment becomes large, or the production efficiency is lowered. The upper limit.
【００１２】Ｖは、Ｍｎと同様、焼入性を向上させるた
め、線径が大きい場合の強化には効果的である。また、
炭窒化物を形成して析出硬化によりパーライトを強化す
る。この目的のために必要に応じて０．０２％以上添加
する。しかし、Ｖ添加によりパーライト変態が遅延し、
マルテンサイトやベイナイトが生成しやすくなるため、
また、Ｖ炭窒化物の析出硬化作用が飽和するため、０．
３％を上限とする。[0012] V, like Mn, improves the hardenability and is therefore effective for strengthening when the wire diameter is large. Also,
It forms carbonitrides and strengthens pearlite by precipitation hardening. For this purpose, 0.02% or more is added if necessary. However, the addition of V delays the pearlite transformation,
Since martensite and bainite are easily generated,
Further, since the precipitation hardening action of V carbonitride is saturated,
The upper limit is 3%.
【００１３】オーステナイト域で高速かつ高減面率の線
材圧延した後、直ちに冷却する場合には、再加熱パテン
ティングの場合に比べて、オーステナイト結晶粒は細か
くなる傾向を有す。しかし、線材の絞り値や鋼線の延性
をより一層向上させたい場合には、必要に応じてＡｌ，
Ｔｉの１種ないし２種以上を０．１％以下添加する。こ
れらの元素はいずれも炭化物や窒化物を生成しやすく、
このため、オーステナイト粒を細粒化し、線材の延性を
向上する効果が強い。しかし、０．１％を超えて添加し
ても、その効果は飽和するのみならず、非金属介在物が
増加するため、０．１％を上限とする。When the wire rod is rolled at a high speed and a high area reduction rate in the austenite region and then immediately cooled, the austenite crystal grains tend to be finer than in the case of reheating patenting. However, if it is desired to further improve the drawing value of the wire rod and the ductility of the steel wire, Al, if necessary,
One or more kinds of Ti are added in an amount of 0.1% or less. All of these elements easily generate carbides and nitrides,
Therefore, the effect of making the austenite grains finer and improving the ductility of the wire is strong. However, even if added over 0.1%, the effect is not only saturated, but also nonmetallic inclusions increase, so 0.1% is made the upper limit.
【００１４】次に、溶融Ｚｎめっき浴組成の限定理由に
ついて述べる。Ｚｎ−Ａｌ合金の耐食性はＡｌ濃度に依
存し、Ａｌ濃度の高い方が良好な耐食性を示す。従っ
て、十分な耐食性向上効果を得るためには２％以上含有
せしめる必要がある。一方、１２％を超えると添加効果
が飽和してくるうえ、融点上昇によりめっき温度が高く
なり、鋼線強度の低下を招く。これより、Ｚｎ−Ａｌ合
金のＡｌ濃度の下限を２％、上限を１２％とする。Next, the reasons for limiting the composition of the hot-dip Zn plating bath will be described. The corrosion resistance of the Zn-Al alloy depends on the Al concentration, and the higher the Al concentration, the better the corrosion resistance. Therefore, in order to obtain a sufficient effect of improving the corrosion resistance, it is necessary to contain 2% or more. On the other hand, if it exceeds 12%, the effect of addition is saturated, and the melting point rises, the plating temperature rises, and the strength of the steel wire decreases. From this, the lower limit of the Al concentration of the Zn-Al alloy is set to 2% and the upper limit is set to 12%.
【００１５】Ｚｎ−Ａｌ合金浴中にＳｉを添加する目的
は、鋼製のめっき槽、鋼製シンカーロール、各種鋼製治
具類からのＦｅの溶出を抑制し、それにより、ドロスの
発生を防止することにある。従って、Ｓｉ添加により不
めっき等のめっき欠陥が減少し、めっき鋼線の耐赤錆発
生特性が著しく向上する。Ｓｉ含有量は、０．０１％で
は上述の効果が認められず、一方、０．１２％を超えて
添加しても合金浴中に溶解しない。従って、Ｓｉ添加量
は０．０１〜０．１２％とする。The purpose of adding Si to the Zn-Al alloy bath is to suppress the elution of Fe from the steel plating bath, the steel sinker rolls, and various steel jigs, thereby preventing the generation of dross. To prevent. Therefore, by adding Si, plating defects such as non-plating are reduced, and the red rust resistance characteristic of the plated steel wire is significantly improved. If the Si content is 0.01%, the above-mentioned effect is not recognized, while if it is added over 0.12%, it does not dissolve in the alloy bath. Therefore, the amount of Si added is set to 0.01 to 0.12%.
【００１６】めっき後の鋼線には伸線加工を施す。伸線
の目的は、溶融めっきにより低下した鋼線強度を加工硬
化により回復すること、および、より一層の高強度化を
達成することである。総減面率が２０％以下では、その
効果が不十分であり、一方、８０％を超えるとＡＣＳＲ
鋼線の延性が劣化する。従って、伸線加工の総減面率の
下限は２０％、上限は８０％とする。The steel wire after plating is drawn. The purpose of wire drawing is to recover the strength of the steel wire reduced by hot dip coating by work hardening and to achieve even higher strength. If the total area reduction rate is 20% or less, the effect is insufficient, while if it exceeds 80%, the ACSR
The ductility of the steel wire deteriorates. Therefore, the lower limit of the total area reduction rate of wire drawing is 20% and the upper limit is 80%.
【００１７】伸線後の鋼線にはブルーイングを施す。ブ
ルーイングの目的は、伸線により低下した延性（伸びと
捻回値）を回復することである。ブルーイング温度は、
３００℃未満では延性の回復が不十分であり、３３０℃
以上が好ましい。一方、３７０℃を超えるとめっき層が
軟化し、３８２℃以上ではめっき層の一部が融解する。
従って、ブルーイング温度の下限は３００℃、上限は３
７０℃とする。なお、本発明法のＡｌ濃度範囲のＺｎ−
Ａｌ合金を使用して溶融めっきを行なった場合、通常の
溶融Ｚｎめっきの場合とは異なり、Ｚｎ−Ｆｅ合金層の
発達はみられず、また、めっき表面光沢もほとんど変化
しない。本発明法により製造された鋼線が、溶融Ｚｎめ
っき鋼線に比べて良好な耐食性を示す理由は、耐食性に
優れためっき組成であることに加え、上述したように、
めっき層の熱的安定性が高いことによる。The steel wire after drawing is subjected to bluing. The purpose of bluing is to recover the ductility (elongation and twist values) that has been reduced by wire drawing. The brewing temperature is
If the temperature is less than 300 ° C, the recovery of ductility is insufficient,
The above is preferable. On the other hand, when the temperature exceeds 370 ° C, the plating layer softens, and when the temperature is 382 ° C or higher, part of the plating layer melts.
Therefore, the lower limit of bluing temperature is 300 ° C and the upper limit is 3.
The temperature is 70 ° C. In addition, Zn- in the Al concentration range of the method of the present invention
When hot-dip plating is performed using an Al alloy, unlike the case of normal hot-dip Zn plating, the Zn-Fe alloy layer does not develop, and the plating surface gloss hardly changes. The steel wire produced by the method of the present invention has a good corrosion resistance as compared with the hot dip galvanized steel wire, in addition to having a plating composition excellent in corrosion resistance, as described above,
This is due to the high thermal stability of the plating layer.
【００１８】[0018]
【実施例】以下に、実施例として、直径２．３mm、引張
強さ２４０kgf/mm2 級および２６０kgf/mm2 級の高張力
ＡＣＳＲ鋼線の製造結果を示す。表１に示す化学成分の
鋼より製造された直径５．５〜９．５mmの線材をパテン
ティング後伸線し直径２．５〜５．５mmの鋼線とした。
これを酸洗、溶融Ｚｎめっきしたのち再び伸線し、その
後、流動層炉を用いてブルーイングを行なった。めっき
付着量はいずれも２５０〜２７０ｇ／ｍ2 である。THE PREFERRED EMBODIMENTS Hereinafter, as an example, shows a diameter 2.3 mm, producing a result of the tensile strength of 240 kgf / mm 2 primary and 260kgf / mm 2 class high tensile ACSR steel wire. A wire rod having a diameter of 5.5 to 9.5 mm manufactured from steel having the chemical composition shown in Table 1 was drawn after patenting to obtain a steel wire having a diameter of 2.5 to 5.5 mm.
This was pickled, hot-dipped with Zn, drawn again, and then subjected to bluing using a fluidized bed furnace. The plating adhesion amount is 250 to 270 g / m 2 in all cases.
【００１９】耐食性の評価は、ＪＩＳ Ｚ２３７１に規
定された塩水噴霧試験により行ない、赤錆発生時間を溶
融Ｚｎめっき鋼線と比較した。結果を下記の（１）式で
定義する耐食性倍率として定量化した。The corrosion resistance was evaluated by a salt spray test prescribed in JIS Z2371, and the time of occurrence of red rust was compared with that of a hot dip galvanized steel wire. The result was quantified as the corrosion resistance magnification defined by the following formula (1).
【数１】 [Equation 1]
【００２０】目標とする強度レベルは、ＣｒあるいはＶ
の添加されていないもの（Ａ，Ｂ，Ｆ，Ｇ群）は２４０
kgf/mm2 級、添加されているもの（Ｃ，Ｄ，Ｅ，Ｈ群）
は２６０kgf/mm2 級である。目標とする延性は、捻回値
（１００ｄ）で２０回以上、また、耐食性は耐食性倍率
で３以上である。The target strength level is Cr or V
240 with no addition of (A, B, F, G groups)
kgf / mm 2 grade, added (C, D, E, H groups)
Is 260 kgf / mm 2 class. The target ductility is 20 times or more in the twist value (100d), and the corrosion resistance is 3 or more in the corrosion resistance magnification.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【表２】 [Table 2]
【００２３】[0023]
【表３】 [Table 3]
【００２４】表１で、Ａ群はＣ含有量、Ｂ群はＳｉ含有
量、Ｃ群はＣｒ含有量、Ｄ群はＶ含有量の影響を示した
ものである。Ｅ−１はＣｒおよびＶの両元素が添加され
ている。Ａ−１はＣ量不足のため目標強度に到達してい
ない。一方、Ａ−４は初析セメンタイトが発生したた
め、鋼線の捻回値が大幅に低下した。同様に、Ｂ群で、
Ｓｉを１．４３％含有するＢ−４は、鋼線の捻回値が低
い。Ｃｒ含有量が１％を超えるＣ−４は、パテンティン
グ材の中心偏析部に少量のマルテンサイトが生成したた
め、鋼線の捻回値が著しく劣化した。Ｄ群でＶを０．３
８％含有するＤ−４の捻回値が低いのも同様の理由によ
る。In Table 1, the effects of the C content in the A group, the Si content in the B group, the Cr content in the C group, and the V content in the D group are shown. E-1 is added with both Cr and V elements. A-1 does not reach the target strength because the amount of C is insufficient. On the other hand, in A-4, the pro-eutectoid cementite was generated, so that the twist value of the steel wire was significantly reduced. Similarly, in group B,
B-4 containing 1.43% Si has a low twist value of the steel wire. In C-4 having a Cr content of more than 1%, a small amount of martensite was generated in the central segregation portion of the patenting material, and the twist value of the steel wire was significantly deteriorated. V in group D is 0.3
The reason why the twist value of D-4 containing 8% is low is also due to the same reason.
【００２５】Ｆ群は、Ｚｎめっき浴中のＡｌ濃度の影響
を示したものである。Ｆ−１は通常のＺｎめっきであ
る。Ｆ−２は、Ａｌ濃度が２％未満であるため、耐食性
倍率が３に達していない。Ａｌ濃度の上昇により、はじ
め耐食性は向上するが、やがて飽和する傾向を示す。し
かし、Ｆ−５は、Ａｌ濃度が最も高く、めっき温度が５
００℃に達したため、鋼線強度が目標値以下となり、さ
らに捻回特性も劣化した。Ｄ−５は、Ｄ−１をＳｉを含
有しないめっき浴でめっきしたものであり、耐食性倍率
が溶融Ｚｎめっきの３倍に達していない。Ａ〜Ｈ群の各
試料で、本発明法のＡｌおよびＳｉ濃度範囲でめっきさ
れたものは、いずれも溶融Ｚｎめっきの３倍以上という
優れた耐食性を示す。Group F shows the influence of the Al concentration in the Zn plating bath. F-1 is normal Zn plating. Since F-2 has an Al concentration of less than 2%, the corrosion resistance magnification does not reach 3. Although the corrosion resistance is improved initially as the Al concentration increases, it tends to saturate. However, F-5 has the highest Al concentration and the plating temperature is 5
Since the temperature reached 00 ° C, the strength of the steel wire fell below the target value, and the twisting characteristics were further deteriorated. D-5 is obtained by plating D-1 with a plating bath containing no Si, and the corrosion resistance ratio does not reach 3 times that of hot-dip Zn plating. Each of the samples of the A to H groups plated in the Al and Si concentration ranges of the method of the present invention exhibits excellent corrosion resistance, which is 3 times or more that of the hot-dip Zn plating.
【００２６】Ｇ群は、伸線減面率の影響を示したもので
ある。伸線減面率が２０％未満のＧ−１は強度が目標に
到達しない。一方、伸線減面率が８０％を超えるＧ−５
は捻回値および伸びが目標値を大幅に下回った。Ｈ群
は、ブルーイング温度の影響を示したものである。Ｈ−
１は３００℃未満でブルーイングしたもので、捻回値、
伸びともに目標値を大幅に下回っている。Group G shows the influence of the wire drawing area reduction rate. The strength of G-1 having a drawing area reduction rate of less than 20% does not reach the target. On the other hand, G-5 with a wire drawing reduction rate exceeding 80%
The values of twist and elongation were significantly lower than the target values. Group H shows the influence of the brewing temperature. H-
No. 1 is blueing at less than 300 ° C and has a twist value,
Both growth is far below the target value.
【００２７】[0027]
【発明の効果】以上の説明から明らかなように、本発明
によれば、従来の溶融Ｚｎめっきの３倍以上の耐食性を
有する２４０kgf/mm2 級および２６０kgf/mm2 級の高強
度ＡＣＳＲ鋼線を製造することが可能である。As apparent from the foregoing description, according to the present invention, conventional melt Zn 240 kgf / mm 2 grade which has a 3-fold or more the corrosion resistance of the plating and 260kgf / mm 2 class high strength ACSR steel wire It is possible to manufacture
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２３Ｃ 2/28 2/38 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location C23C 2/28 2/38
Claims (2)
て溶融めっきしたのち、総減面率２０〜８０％で伸線
し、その後、３００〜３７０℃でブルーイングすること
を特徴とする耐食性に優れたＡＣＳＲ用高強度Ｚｎめっ
き鋼線の製造方法。1. A weight ratio of C: 0.75 to 1.0%, Si: 0.15 to 1.3%, Mn: 0.3 to 1.0%, and the balance Fe and unavoidable impurities. The weight ratio of the steel wire is Al: 2 to 12%, Si: 0.01 to 0.12%, and the balance is hot-dip plated with an alloy bath containing Zn and unavoidable impurities. A method for producing a high-strength Zn-plated steel wire for ACSR having excellent corrosion resistance, which comprises drawing at 80% and then bluing at 300 to 370 ° C.
に、 Ａｌ，Ｔｉの１種ないし２種をそれぞれ０．１％以下を
含有し、残余をＦｅおよび不可避的不純物からなる鋼線
を、 重量比で Ａｌ：２〜１２％、 Ｓｉ：０．０１〜０．１２％、 残余をＺｎおよび不可避的不純物からなる合金浴を用い
て溶融めっきしたのち、総減面率２０〜８０％で伸線
し、その後、３００〜３７０℃でブルーイングすること
を特徴とする耐食性に優れたＡＣＳＲ用高強度Ｚｎめっ
き鋼線の製造方法。2. C: 0.75 to 1.0%, Si: 0.15 to 1.3%, Mn: 0.3 to 1.0%, and Cr: 0.1 to 1 by weight ratio. 0.0%, V: 0.02 to 0.30%, 1 or 2 kinds, and 1 or 2 kinds of Al and Ti, each containing 0.1% or less, the balance being Fe and unavoidable. A steel wire consisting of impurities is Al: 2 to 12% in weight ratio, Si: 0.01 to 0.12%, and the rest is hot-dipped using an alloy bath consisting of Zn and unavoidable impurities. A method for producing a high-strength Zn-plated steel wire for ACSR having excellent corrosion resistance, which comprises drawing at a rate of 20 to 80% and then bluing at 300 to 370 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02150193A JP3298686B2 (en) | 1993-02-09 | 1993-02-09 | Method for producing high-strength galvanized steel wire for ACSR with excellent corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02150193A JP3298686B2 (en) | 1993-02-09 | 1993-02-09 | Method for producing high-strength galvanized steel wire for ACSR with excellent corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06235023A true JPH06235023A (en) | 1994-08-23 |
| JP3298686B2 JP3298686B2 (en) | 2002-07-02 |
Family
ID=12056721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02150193A Expired - Lifetime JP3298686B2 (en) | 1993-02-09 | 1993-02-09 | Method for producing high-strength galvanized steel wire for ACSR with excellent corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3298686B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6576844B1 (en) | 1999-09-30 | 2003-06-10 | Yazaki Corporation | High-strength light-weight conductor and twisted and compressed conductor |
-
1993
- 1993-02-09 JP JP02150193A patent/JP3298686B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6576844B1 (en) | 1999-09-30 | 2003-06-10 | Yazaki Corporation | High-strength light-weight conductor and twisted and compressed conductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3298686B2 (en) | 2002-07-02 |
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