JPH0821032A - Plated pc steel stranded wire with coating - Google Patents
Plated pc steel stranded wire with coatingInfo
- Publication number
- JPH0821032A JPH0821032A JP6156111A JP15611194A JPH0821032A JP H0821032 A JPH0821032 A JP H0821032A JP 6156111 A JP6156111 A JP 6156111A JP 15611194 A JP15611194 A JP 15611194A JP H0821032 A JPH0821032 A JP H0821032A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- steel
- stranded wire
- layer
- resin coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/12—Making ropes or cables from special materials or of particular form of low twist or low tension by processes comprising setting or straightening treatments
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
- D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
- D07B1/144—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases for cables or cable components built-up from metal wires
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
- D07B1/162—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber enveloping sheathing
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2207/00—Rope or cable making machines
- D07B2207/40—Machine components
- D07B2207/404—Heat treating devices; Corresponding methods
- D07B2207/4063—Heat treating devices; Corresponding methods for stress relief
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Bridges Or Land Bridges (AREA)
- Reinforcement Elements For Buildings (AREA)
- Ropes Or Cables (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、斜張橋の吊りワイヤ等
に用いられる高耐食・高疲労強度被覆付きめっきＰＣ鋼
より線に関し、さらに詳しくは、高張力をかけた状態で
の振動により発生するフレッティングを十分に予防する
と共に、この被覆付きめっきＰＣ鋼より線を被覆の上か
ら把持し、被覆を破断しない範囲内の張力で長さ方向に
引張った時、被覆とＰＣ鋼より線とが抜け移動しないよ
うな被覆付きめっきＰＣ鋼より線に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plated PC stranded wire with a high corrosion resistance and a high fatigue strength coating, which is used for suspension wires of cable-stayed bridges, and more particularly, by vibrating under high tension. While sufficiently preventing the fretting that occurs, when the coated plated PC steel wire with this coating is gripped from above the coating and pulled in the longitudinal direction by a tension that does not break the coating, the coating and PC steel stranded wire The present invention relates to a coated PC steel stranded wire that does not come off and moves.
【０００２】[0002]
【従来の技術】特開平４−２４６１２５号公報には吊り
構造用高強度鋼線が開示されており、めっき後ブルーイ
ングする技術が開示されている。このようなめっきのみ
で耐食性を確保しようとする技術では、ＰＣ鋼より線に
高張力をかけた状態での振動により発生するフレッティ
ングの予防に対して不十分である。フレッティングはＰ
Ｃ鋼より線の振動によって素線間に生ずる摩耗及び茶褐
色の変色である。特開昭６０−９４６８６号公報の耐食
性ＰＣ鋼より線も同様である。2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 4-246125 discloses a high-strength steel wire for a hanging structure, and a technique for bluing after plating is disclosed. The technique of ensuring corrosion resistance only by such plating is insufficient for preventing fretting caused by vibration in a state in which a PC steel strand is subjected to high tension. Fretting is P
It is abrasion and discoloration of brown that occur between strands due to vibration of the C steel stranded wire. The same applies to the corrosion-resistant PC stranded wire disclosed in JP-A-60-94686.
【０００３】特開昭６１−１２２３６１号公報には、め
っき層を施した上に合成樹脂被覆で被覆しその間にグリ
スその他の防錆潤滑剤を充填したアンボンドＰＣ鋼材が
開示されている。この鋼材は、アンボンドＰＣ鋼材であ
るため、被覆とＯＰＣ鋼材とは長手方向に滑動し、斜張
橋の吊りワイヤ等に用いることはできない。特開平５−
１２５５６６号公報には重防食ＰＣ鋼より線が開示され
ているが、めっき層の上にプラスチック被覆を施したも
ので、上記フレッティングに対する考慮が払われていな
い。Japanese Unexamined Patent Publication (Kokai) No. 61-122361 discloses an unbonded PC steel material having a plated layer, a synthetic resin coating, and grease or other rust preventive lubricant filled in between. Since this steel material is an unbonded PC steel material, the coating and the OPC steel material slide in the longitudinal direction and cannot be used for a suspension wire of a cable-stayed bridge or the like. Japanese Patent Laid-Open No. 5-
Japanese Patent No. 125566 discloses a heavy-corrosion-proof PC stranded wire, but it is one in which a plastic coating is applied on a plating layer, and the above-mentioned fretting is not considered.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、高張力をか
けた状態での振動により発生するフレッティングを十分
に予防し、更に樹脂で覆って被覆付きめっきＰＣ鋼より
線とした後、これを樹脂被覆の上から把持し、樹脂被覆
を破断しない範囲内の張力で長さ方向に引張った時、樹
脂被覆が単独で移動しないような被覆付きめっきＰＣ鋼
より線及びその製造方法を提供することを目的とするも
のである。DISCLOSURE OF THE INVENTION The present invention sufficiently prevents fretting caused by vibration under a condition of high tension, and further covers with resin to form a coated PC steel twisted wire, PROBLEM TO BE SOLVED: To provide a coated PC steel stranded wire with which a resin coating does not move independently when it is grasped from above a resin coating and pulled in a length direction with a tension within a range that does not break the resin coating, and a manufacturing method thereof. That is the purpose.
【０００５】[0005]
【課題を解決するための手段】本発明は、低レラクセー
ションＰＣ鋼より線であって、めっき合金層のうちδ 1
層の厚さが５μｍ以下であり、めっきＰＣ鋼より線の側
線の相互の接合部のみをシールする潤滑剤層を有し、側
線の外接円より内側に突出した横断面を持つ樹脂被覆を
外周に有することを特徴とする被覆付きめっきＰＣ鋼よ
り線を提供するものである。SUMMARY OF THE INVENTION The present invention is a low relaxor.
It is a twisted PC steel wire and δ out of the plated alloy layer 1
The layer thickness is 5 μm or less, and the wire side of the plated PC steel is
Has a lubricant layer that seals only the mutual joints of the wires,
A resin coating with a cross section protruding inward from the circumscribed circle of the wire
It is a plated PC steel with a coating characterized by having it on the outer circumference.
It is to provide a wire.
【０００６】低レラクセーションＰＣ鋼より線は、線材
を熱処理、伸線し、めっきを施した後、撚り線を行い焼
戻し温度でホットストレッチングしてある。潤滑剤とし
ては防錆潤滑性を備えたもの、例えばワックス又はグリ
スである。この潤滑剤はめっきＰＣ鋼より線の谷部の側
線の接合部をシールするに必要な最低限の量が必要であ
る。樹脂被覆は、例えばポリエチレン、ポリプロピレン
等のポリオレフィン樹脂層の被覆とし、通常はポリエチ
レンを用いる。The low-relaxation PC steel stranded wire is obtained by hot-stretching the wire at a tempering temperature after heat-treating, drawing and plating the wire. The lubricant is one having anti-rust lubricity, such as wax or grease. This lubricant is required in the minimum amount necessary to seal the joint portion of the side wire at the valley portion of the plated PC steel wire. The resin coating is a coating of a polyolefin resin layer such as polyethylene or polypropylene, and polyethylene is usually used.
【０００７】上記被覆付きめっきＰＣ鋼より線の線材と
しては、溶融亜鉛めっき又は溶融亜鉛−アルミめっきを
施した後伸線した線材とすると好ましい。また、ＰＣ鋼
より線の横断面における側線より外側の潤滑剤の面積が
鋼線に外接する円周と鋼線外面が囲む面積の１／４以下
とすることにより、上記目的を好適に達成することがで
きる。As the wire rod of the coated PC steel stranded wire with the coating, it is preferable to use a wire rod which has been subjected to hot dip galvanizing or hot dipping zinc-aluminum plating and then drawn. Further, the area of the lubricant on the outer side of the side wire in the cross section of the PC steel stranded wire is preferably ¼ or less of the area surrounded by the circumference circumscribing the steel wire and the outer surface of the steel wire, thereby suitably achieving the above object. be able to.
【０００８】上記被覆付きめっきＰＣ鋼より線の製造方
法は、めっき工程後のめっき合金層のδ1 層の厚さが３
μｍ以下になるように、めっき浴温度と浸漬時間を調節
し、焼戻し温度への加熱を高周波誘導装置により急速加
熱した後、水で急冷することによりホットストレッチン
グ後の合金層の厚さを５μｍ以下とするものである。な
お、樹脂被覆の工程では、押し出す樹脂の圧力及び温度
を調節し、余分な潤滑剤をＰＣ鋼より線の空隙部又は後
方へ送り出すことによって、ＰＣ鋼より線の横断面にお
ける側線より外側の潤滑剤の面積が鋼線に外接する円周
と鋼線外面が囲む面積の１／４以下本発明の被覆付きめ
っきＰＣ鋼より線を製造することができる。In the above-mentioned method for producing a coated PC steel stranded wire with a coating, the thickness of the δ 1 layer of the plated alloy layer after the plating step is 3
The temperature of the plating bath and the immersion time are adjusted so as to be not more than μm, the heating to the tempering temperature is rapidly heated by the high frequency induction device, and then the alloy layer after hot stretching is made to have a thickness of 5 μm by rapidly cooling with water. It is as follows. In the resin coating process, the pressure and temperature of the extruded resin are adjusted, and excess lubricant is sent to the voids or the rear of the PC steel wire to lubricate the outer side of the side wire in the cross section of the PC steel wire. The area of the agent is ¼ or less of the circumference circumscribed by the steel wire and the area surrounded by the outer surface of the steel wire. A wire can be produced from the coated PC steel of the present invention.
【０００９】[0009]
【作用】本発明の被覆付きめっきＰＣ鋼より線は、線材
を熱処理、伸線し、めっきを施した後、より線を行い焼
戻し温度でホットストレッチングする低レラクセーショ
ンＰＣ鋼より線である。この線材としては溶融亜鉛めっ
き又は溶融亜鉛−アルミめっきを施した後伸線した線材
を用いる。The coated and coated PC steel stranded wire of the present invention is a low-relaxation PC stranded wire in which a wire is heat-treated, drawn, plated, and then twisted and hot stretched at a tempering temperature. . As this wire rod, a wire rod that has been subjected to hot dip galvanization or hot dip zinc-aluminum plating and then drawn is used.
【００１０】この被覆付きめっきＰＣ鋼より線は、めっ
き合金層のうちδ1 層の厚さを５μｍ以下とする。図６
は合金層のδ1 層の厚さと疲労限との関係を示すもの
で、疲労強度を素線の回転曲げ疲労で評価したものであ
る。従来レベルでは疲労限が３０〜４５ｋｇｆ／ｍｍ2
である。疲労限が５０ｋｇｆ／ｍｍ2 以上のものを得る
ためには、鉄−亜鉛合金層はζ層（ＦｅＺｎ13）及びδ
層（ＦｅＺｎ9 ）から成り立っていることが必要であ
る。しかし、図６に示すようにδ1 層（ＦｅＺｎ7）が
存在しても厚さが５μ以下であればよい。In this coated PC steel twisted wire, the thickness of the δ 1 layer of the plated alloy layer is 5 μm or less. Figure 6
Shows the relationship between the thickness of the δ 1 layer of the alloy layer and the fatigue limit, and the fatigue strength was evaluated by rotating bending fatigue of the wire. At the conventional level, the fatigue limit is 30 to 45 kgf / mm 2.
Is. In order to obtain a fatigue limit of 50 kgf / mm 2 or more, the iron-zinc alloy layer should have a ζ layer (FeZn 13 ) and a δ layer.
It must consist of a layer (FeZn 9 ). However, as shown in FIG. 6, even if the δ 1 layer (FeZn 7 ) is present, the thickness may be 5 μm or less.
【００１１】図６に示すように、めっき合金層のδ1 層
の厚さは疲労限と密接な関係があり、これを５μｍ以下
とすると疲労限が向上し、５０ｋｇｆ／ｍｍ2 を確保す
ることができる。次に本発明の被覆付きめっきＰＣ鋼よ
り線は、少なくともめっきＰＣ鋼より線の側線の相互の
接合部をシールする潤滑剤層を有することを要件とす
る。ワックス又はグリスの層によって側線と側線の接点
部分をシールすることにより、高張力をかけた状態での
振動により発生するフレッティングを予防することがで
きる。図５に、ＰＣ鋼より線の側線相互間を潤滑剤でシ
ールした場合とシールなしの場合の疲労試験におけるフ
レッティング発生率のデータを掲げた。試験は３本につ
いて行い、最大０．６Ｐｕの荷重を掛け、振幅２０ｋｇ
ｆ／ｍｍ2 で試験した。側線間を完全にシールした試験
片では、フレッティングは全く発生しなかったが、シー
ルなしの場合は、３本中２本は茶褐色の変色を起こして
おり、フレッティングが認められた。部分的にシールし
た試験片ではその中間であった。As shown in FIG. 6, the thickness of the δ 1 layer of the plating alloy layer is closely related to the fatigue limit. If the thickness is 5 μm or less, the fatigue limit is improved and 50 kgf / mm 2 should be secured. You can The coated plated PC steel stranded wire of the present invention is then required to have at least a lubricant layer that seals the mutual joints of the side wires of the plated PC steel stranded wire. By sealing the side lines and the contact points of the side lines with a layer of wax or grease, it is possible to prevent fretting caused by vibration under high tension. FIG. 5 shows the data of the fretting occurrence rate in the fatigue test with and without the seal between the side lines of the PC steel stranded wire with the lubricant. The test is carried out on 3 pieces, the maximum load of 0.6 Pu is applied, and the amplitude is 20 kg.
Tested at f / mm 2 . In the test piece in which the lateral lines were completely sealed, no fretting occurred at all, but in the case of no sealing, 2 out of 3 had a brown discoloration, and fretting was observed. The partially sealed specimen was in the middle.
【００１２】本発明の被覆付きめっきＰＣ鋼より線は、
これを樹脂被覆の上から把持し、樹脂被覆を破断しない
範囲内の張力で長さ方向に引張った時、樹脂被覆が単独
で移動しないようにすることが必要である。このこと
は、樹脂被覆がＰＣ鋼より線の側線の谷部に十分に入り
込んでいることを要する。図３に示すように、１５．２
ｍｍφのストランドに施した長さ１ｍの樹脂被覆４を持
つ試験片（ストランド）１０の被覆４の引き抜き試験を
行った。一方のクランプ１１で被覆４上をつかみ、他方
のクランプ１２で鋼より線をつかみ、クランプ１１、１
２間に５０ｋｇｆの引張り力を掛け、樹脂被覆４の抜け
発生率を測定した。ＰＣ鋼より線の横断面における、側
線より外側に存在する潤滑剤の面積と、鋼線に外接する
円周と鋼線外面が囲む面積との比を変えて行った結果を
図４に示した。図４に示すように、前記面積比が０．３
以下であると抜け発生率は零であった。従って、安全を
見て前記面積比を１／４以下とすればよいとの結論に達
した。The coated plated PC steel strand of the present invention comprises:
It is necessary to hold the resin coating on the resin coating and prevent the resin coating from moving independently when the resin coating is pulled in the lengthwise direction with a tension within a range that does not break the resin coating. This requires that the resin coating be sufficiently embedded in the valley of the side wire of the PC steel wire. As shown in FIG.
A pull-out test was performed on the coating 4 of the test piece (strand) 10 having the resin coating 4 having a length of 1 m applied to the mmφ strand. One clamp 11 grabs the coating 4 and the other clamp 12 grabs the steel strand,
A pulling force of 50 kgf was applied between the two to measure the drop occurrence rate of the resin coating 4. FIG. 4 shows the results obtained by changing the ratio of the area of the lubricant existing outside the side wire and the ratio of the circumference circumscribing the steel wire and the area surrounded by the outer surface of the steel wire in the cross section of the PC steel stranded wire. . As shown in FIG. 4, the area ratio is 0.3.
The drop-out occurrence rate was zero when it was below. Therefore, it was concluded that the area ratio should be 1/4 or less for safety.
【００１３】次に、めっき工程後のめっき合金層のδ1
層の厚さを５μｍ以下にする技術について説明する。め
っき工程後のめっき合金層のδ1 層の厚さが３μｍ以下
になるようめっき浴温度と浸漬時間を調節し、焼戻し温
度への加熱を高周波誘導装置により急速加熱した後、水
で急冷する。これにより、ホットストレッチング後の合
金層のδ1 層の厚さを５μｍ以下とすることができる。Next, δ 1 of the plating alloy layer after the plating process
A technique for reducing the layer thickness to 5 μm or less will be described. The plating bath temperature and immersion time are adjusted so that the thickness of the δ 1 layer of the plated alloy layer after the plating step is 3 μm or less, heating to the tempering temperature is rapidly heated by a high frequency induction device, and then rapidly cooled with water. As a result, the thickness of the δ 1 layer of the alloy layer after hot stretching can be 5 μm or less.
【００１４】また、本発明の被覆付きめっきＰＣ鋼より
線の潤滑剤の量の調整方法は、樹脂コーティング工程に
おいて、押し出し樹脂の圧力及び温度を調節し、余分な
潤滑剤をＰＣ鋼より線の空隙部又は後方へ送り出すこと
によって達成することができる。Further, the method of adjusting the amount of the lubricant of the coated and coated PC steel strand of the present invention adjusts the pressure and temperature of the extruded resin in the resin coating step to remove the excess lubricant of the PC steel strand. It can be achieved by feeding into the void or rearward.
【００１５】[0015]
【実施例】図１に本発明の実施例の被覆付きめっきＰＣ
鋼より線の断面図を示した。心線５の回りに６本の側線
２が撚りを掛けられて巻き付けられている。側線２、２
相側間には潤滑剤３が介在している。樹脂被覆４はその
外周に設けられている。樹脂被覆４は、側線２の外接円
６より内側に突出した横断面を有し、側線２、２相互の
谷の部分に食い込んでいる。図２は部分拡大図で、側線
２、２の外接円６と側線２、２が囲っている面積内に占
める潤滑剤３の断面積がこの囲っている面積の１／４以
下であると、樹脂被覆４に引張荷重をかけたとき樹脂被
覆の抜けが生じない。EXAMPLE FIG. 1 shows a coated PC with an example of the present invention.
A cross-sectional view of the steel stranded wire is shown. Six side wires 2 are twisted and wound around the core wire 5. Lateral lines 2, 2
The lubricant 3 is interposed between the phase sides. The resin coating 4 is provided on the outer periphery thereof. The resin coating 4 has a cross section protruding inward from the circumscribing circle 6 of the side wire 2, and cuts into the valley portion between the side wires 2 and 2. FIG. 2 is a partially enlarged view showing that the circumscribing circle 6 of the side lines 2 and 2 and the cross-sectional area of the lubricant 3 occupying the area enclosed by the side lines 2 and 2 are ¼ or less of the enclosed area. When a tensile load is applied to the resin coating 4, the resin coating does not come off.
【００１６】次に本発明の被覆付きめっきＰＣ鋼より線
の製造について説明する。直径１２ｍｍの線材をパテン
チングした後、予備伸線し、直径７．５ｍｍとし、溶融
亜鉛めっきにおいて浴温度４５０℃、浸漬時間５秒の条
件で実施し、めっき合金層のδ1 層の厚さ２μｍの鋼線
を得た。次に仕上げ伸線で直径５．２０ｍｍとし、撚り
線機により７本撚りにし、高周波加熱で３７０℃に急速
加熱し、ホットストレッチングを行い、水で急冷するこ
とにより、めっき合金層のδ1 層の厚さ２μｍ、素線の
回転曲げ疲労強度５３ｋｇｆ／ｍｍ2 の亜鉛めっきＰＣ
鋼より線を得た。Next, the production of the coated plated PC steel strand of the present invention will be described. After patenting the wire diameter 12 mm, was pre-drawn, with a diameter of 7.5 mm, bath temperature 450 ° C. In galvanizing was performed on the conditions of immersion time 5 seconds, the thickness 2μm of [delta] 1 layer of the plating alloy layer Got the steel wire. Next, finish drawing wire to a diameter of 5.20 mm, twist 7 strands with a wire twisting machine, rapidly heat to 370 ° C. by high frequency heating, perform hot stretching, and quench with water to obtain δ 1 of the plated alloy layer. Zinc-plated PC with layer thickness of 2 μm and rotating bending fatigue strength of strands 53 kgf / mm 2.
I got a wire from steel.
【００１７】被覆は高密度ポリエチレンの押し出し成形
で外径１９ｍｍ、被覆厚さ１．５ｍｍで、グリスの断面
積が１．０ｍｍ2 の被覆つき亜鉛めっきＰＣ鋼より線を
得た。このグリス断面積は、鋼線の外接円と鋼線が囲む
面積の１／６である。この被覆つき亜鉛めっきＰＣ鋼よ
り線を使用して５０ｋｇｆで、図３に示す樹脂被覆の抜
け試験を実施したところ抜けはなかった。また、最大
０．６Ｐｕの荷重を掛け、振幅２０ｋｇｆ／ｍｍ2 で疲
労試験を３本実施したところ、そのうち２本はフレッテ
ィングは認められなかった。The coating was extruded from high density polyethylene to obtain a coated galvanized PC steel wire having an outer diameter of 19 mm, a coating thickness of 1.5 mm and a grease cross section of 1.0 mm 2 . This grease cross-sectional area is 1/6 of the area surrounded by the circumscribed circle of the steel wire and the steel wire. Using this coated galvanized PC steel stranded wire at 50 kgf, the resin coating removal test shown in FIG. 3 was carried out, and no removal was found. When a maximum load of 0.6 Pu was applied and three fatigue tests were performed at an amplitude of 20 kgf / mm 2 , no fretting was observed in two of them.
【００１８】[0018]
【発明の効果】本発明によれば、高耐食性であってフレ
ッティングを十分に予防することができ、疲労限が大き
く、樹脂被覆を破断しない範囲内の張力で長さ方向に引
張った時、樹脂被覆が単独で移動しないという優れた効
果を奏する。EFFECTS OF THE INVENTION According to the present invention, high corrosion resistance, sufficient fretting prevention, a large fatigue limit, and a tensile strength within a range that does not break the resin coating, It has an excellent effect that the resin coating does not move alone.
【図面の簡単な説明】[Brief description of drawings]
【図１】実施例の被覆付きめっきＰＣ鋼より線の断面図
である。FIG. 1 is a cross-sectional view of a coated PC steel stranded wire of an example.
【図２】実施例の被覆付きめっきＰＣ鋼より線の部分断
面図である。FIG. 2 is a partial cross-sectional view of a coated plated PC steel stranded wire of an example.
【図３】樹脂被覆抜け発生率測定試験の説明図である。FIG. 3 is an explanatory diagram of a resin coating loss occurrence rate measurement test.
【図４】樹脂被覆抜け発生率測定試験結果を示すグラフ
である。FIG. 4 is a graph showing the results of a resin coating loss occurrence rate measurement test.
【図５】フレッティング発生率のグラフである。FIG. 5 is a graph of a fretting occurrence rate.
【図６】めっき合金層のδ1 層の厚さと疲労限との関係
を示すグラフである。FIG. 6 is a graph showing the relationship between the thickness of the δ 1 layer of the plated alloy layer and the fatigue limit.
１ ＰＣ鋼より線 ２ 側線 ３ 潤滑剤 ４ 樹脂被覆 ５ 心線 ６ 外接円 ７ 面積 １０ 試験片 １１、１２ クランプ 1 PC steel stranded wire 2 Side wire 3 Lubricant 4 Resin coating 5 Core wire 6 Outer circle 7 Area 10 Test piece 11, 12 Clamp
フロントページの続き (72)発明者 武井 雅光 千葉市中央区新浜町１番地 川鉄テクノワ イヤ株式会社内 (72)発明者 庄司 茂雄 千葉市中央区新浜町１番地 川鉄テクノワ イヤ株式会社内 (72)発明者 峰 公雄 東京都千代田区内幸町２丁目２番３号 川 崎製鉄株式会社東京本社内 (72)発明者 坂吉 利邦 東京都千代田区内幸町２丁目２番３号 川 崎製鉄株式会社東京本社内 (72)発明者 中村 茂樹 東京都千代田区内幸町２丁目２番３号 川 崎製鉄株式会社東京本社内 (72)発明者 鈴木 昭好 東京都千代田区二番町12番地 株式会社エ スイー内 (72)発明者 大橋 渡 東京都千代田区二番町12番地 株式会社エ スイー内 (72)発明者 平山 晃 東京都千代田区二番町12番地 株式会社エ スイー内Continued front page (72) Inventor Masamitsu Takei 1 Niihamacho, Chuo-ku, Chiba City, Kawatetsu Technoyaiya Co., Ltd. (72) Inventor Shigeo Shoji, 1 Niihamacho, Chuo-ku, Chiba City, Kawatetsu Technoyaiya Co., Ltd. (72) Invention Kimio Mine 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Head Office Kawasaki Steel Co., Ltd. (72) Inventor Toshikuni Sakaki 2-3-2 Uchiyuki-cho, Chiyoda-ku, Tokyo Kawasaki Steel Co., Ltd. 72) Inventor Shigeki Nakamura 2-3 2-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki Steel Co., Ltd. Tokyo Head Office (72) Inventor Akiyoshi Suzuki, Nibancho, Chiyoda-ku, Tokyo 12 Esu Co., Ltd. (72) Inventor Wataru Ohashi, 12-2 Nibancho, Chiyoda-ku, Tokyo Esu Co., Ltd. (72) Akira Hirayama 12-12, Nibancho, Chiyoda-ku, Tokyo Esu, Inc.
Claims (4)
て、めっき合金層のうちδ1 層の厚さが５μｍ以下であ
り、めっきＰＣ鋼より線の側線の相互の接合部のみをシ
ールする潤滑剤層を有し、側線の外接円より内側に突出
した横断面を持つ樹脂被覆を外周に有することを特徴と
する被覆付きめっきＰＣ鋼より線。1. A low relaxation PC steel stranded wire, wherein the thickness of the δ 1 layer of the plating alloy layer is 5 μm or less, and seals only the joints between the side wires of the plated PC steel stranded wire. A coated plated PC steel stranded wire having a lubricant layer and having a resin coating on the outer periphery having a cross-section protruding inward from the circumscribed circle of the side wire.
ルミめっきを施した後伸線した線材であることを特徴と
する請求項１記載の被覆付きめっきＰＣ鋼より線。2. The coated and coated PC steel stranded wire according to claim 1, wherein the wire is a wire drawn after hot-dip galvanizing or hot-dip zinc-aluminum plating.
外側の潤滑剤の面積が鋼線に外接する円周と鋼線外面が
囲む面積の１／４以下であることを特徴とする請求項１
記載の被覆付きめっきＰＣ鋼より線。3. The area of the lubricant outside the side wire in the cross section of the PC steel stranded wire is not more than ¼ of the area surrounded by the circumference circumscribing the steel wire and the outer surface of the steel wire. 1
A coated PC steel stranded wire with the coating described.
厚さが３μｍ以下になるようめっき浴温度と浸漬時間を
調節し、焼戻し温度への加熱を高周波誘導装置により急
速加熱した後、水で急冷することによりホットスレッチ
ング後の合金層の厚さを５μｍ以下とすることを特徴と
する被覆付きめっきＰＣ鋼より線の製造方法。4. The plating bath temperature and immersion time are adjusted so that the thickness of the δ 1 layer of the plating alloy layer after the plating step is 3 μm or less, and heating to the tempering temperature is rapidly heated by a high frequency induction device, A method for producing a coated plated PC steel stranded wire, wherein the thickness of the alloy layer after hot-threading is 5 μm or less by quenching with water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6156111A JP2771775B2 (en) | 1994-07-07 | 1994-07-07 | Coated plated PC steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6156111A JP2771775B2 (en) | 1994-07-07 | 1994-07-07 | Coated plated PC steel strand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0821032A true JPH0821032A (en) | 1996-01-23 |
| JP2771775B2 JP2771775B2 (en) | 1998-07-02 |
Family
ID=15620558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6156111A Expired - Fee Related JP2771775B2 (en) | 1994-07-07 | 1994-07-07 | Coated plated PC steel strand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2771775B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970062199A (en) * | 1996-02-06 | 1997-09-12 | 마르샹-아르뿜 쟝-삐에르 | Suspension device for civil engineering and the method |
| JP2002348652A (en) * | 2001-05-23 | 2002-12-04 | Kokoku Kousensaku Kk | Plated strand wire |
| JP2008007896A (en) * | 2006-06-30 | 2008-01-17 | Sumitomo Denko Steel Wire Kk | High-strength pc steel stranded wire and concrete structure using the same |
| JP2008007898A (en) * | 2006-06-30 | 2008-01-17 | Sumitomo Denko Steel Wire Kk | High-strength pc steel stranded wire and concrete structure using the same |
| JP5172028B1 (en) * | 2012-04-12 | 2013-03-27 | 黒沢建設株式会社 | Double rust prevention PC steel strand |
| CN103485220A (en) * | 2013-10-15 | 2014-01-01 | 贵州钢绳股份有限公司 | Manufacturing method of high-strength wire rope for traction structure |
| CN104164836A (en) * | 2014-08-11 | 2014-11-26 | 王双其 | Protection method for stainless steel combined casing pipe for bridge cable |
| CN110306431A (en) * | 2019-08-12 | 2019-10-08 | 广东迈诺工业技术有限公司 | A kind of bridge cable multiple zinc-base alloy coating wire and its hot plating technology |
-
1994
- 1994-07-07 JP JP6156111A patent/JP2771775B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970062199A (en) * | 1996-02-06 | 1997-09-12 | 마르샹-아르뿜 쟝-삐에르 | Suspension device for civil engineering and the method |
| JP2002348652A (en) * | 2001-05-23 | 2002-12-04 | Kokoku Kousensaku Kk | Plated strand wire |
| JP2008007896A (en) * | 2006-06-30 | 2008-01-17 | Sumitomo Denko Steel Wire Kk | High-strength pc steel stranded wire and concrete structure using the same |
| JP2008007898A (en) * | 2006-06-30 | 2008-01-17 | Sumitomo Denko Steel Wire Kk | High-strength pc steel stranded wire and concrete structure using the same |
| JP5172028B1 (en) * | 2012-04-12 | 2013-03-27 | 黒沢建設株式会社 | Double rust prevention PC steel strand |
| CN103485220A (en) * | 2013-10-15 | 2014-01-01 | 贵州钢绳股份有限公司 | Manufacturing method of high-strength wire rope for traction structure |
| CN104164836A (en) * | 2014-08-11 | 2014-11-26 | 王双其 | Protection method for stainless steel combined casing pipe for bridge cable |
| CN110306431A (en) * | 2019-08-12 | 2019-10-08 | 广东迈诺工业技术有限公司 | A kind of bridge cable multiple zinc-base alloy coating wire and its hot plating technology |
| CN110306431B (en) * | 2019-08-12 | 2020-10-09 | 广东迈诺工业技术有限公司 | Multi-element zinc-based alloy coating steel wire for bridge cable and hot-dip coating process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2771775B2 (en) | 1998-07-02 |
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