JPH10204683A - Plated steel wire rod excellent in wire drawability and its production - Google Patents
Plated steel wire rod excellent in wire drawability and its productionInfo
- Publication number
- JPH10204683A JPH10204683A JP601997A JP601997A JPH10204683A JP H10204683 A JPH10204683 A JP H10204683A JP 601997 A JP601997 A JP 601997A JP 601997 A JP601997 A JP 601997A JP H10204683 A JPH10204683 A JP H10204683A
- Authority
- JP
- Japan
- Prior art keywords
- steel wire
- plating layer
- plated
- plating
- plated steel
- 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
Landscapes
- Metal Extraction Processes (AREA)
- Electroplating Methods And Accessories (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、伸線加工性に優れ
ためっき鋼線材およびその製造方法に関し、特にはゴム
製品補強用スチールコード等に好適に用いられる、例え
ば黄銅めっき鋼線材およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plated steel wire excellent in wire drawability and a method for producing the same, and more particularly, for example, a brass-plated steel wire suitably used for a steel cord for reinforcing rubber products, and a method for producing the same. About the method.
【０００２】[0002]
【従来の技術】めっき鋼線は、下地鋼線材の強度、延
性、靭性、経済性等を活用しつつめっきにより耐食性、
反応性等を付加したものであり、広い分野で使用されて
いる。近年の利用技術の高度化及び経済性の要求に伴
い、高品質のめっき鋼線を低コストで製造することが望
まれている。2. Description of the Related Art A plated steel wire is made of a corrosion-resistant material by plating while utilizing the strength, ductility, toughness, economy, etc. of an underlying steel wire.
It is added with reactivity and the like, and is used in a wide range of fields. With the recent sophistication of utilization technology and demand for economy, it is desired to produce high-quality plated steel wires at low cost.
【０００３】例えばタイヤの補強材として、黄銅めっき
を施した高炭素鋼線を撚り合わせたスチールコードが使
用されているが、省エネルギー、省資源の観点からタイ
ヤの軽量化が望まれており、高強度めっき鋼線の経済的
製造に対する要請が高まってきている。[0003] For example, a steel cord obtained by twisting brass-plated high carbon steel wires is used as a reinforcing material for a tire. However, it is desired to reduce the weight of the tire from the viewpoint of energy saving and resource saving. The demand for economical production of high-strength plated steel wires is increasing.
【０００４】ところで、めっき鋼線の製造工程は、下地
鋼線材の表面に所定のめっきを施しためっき鋼線材に縮
径加工を施し、所望の線径のめっき鋼線を得るのが一般
的であり、縮径加工方法として穴ダイス伸線が広く用い
られている。[0004] In the process of producing a plated steel wire, it is general to perform a diameter reduction process on a plated steel wire obtained by plating a surface of a base steel wire with a predetermined plating to obtain a plated steel wire having a desired wire diameter. In addition, hole die drawing is widely used as a diameter reduction processing method.
【０００５】このめっき鋼線材の穴ダイス伸線において
は、表面にめっきが付いていることに起因する特有の問
題が生じ易く、例えば次のような現象が問題として挙げ
られる。 （１）穴ダイス通過時にめっきの一部が剥離してめっき
に欠陥を生じる。 （２）剥離しためっきが穴ダイスに詰まる。 （３）めっき表面に生じた酸化物のためダイスの摩耗が
促進される。[0005] In the wire die-drawing of a plated steel wire, a specific problem due to the plating on the surface is apt to occur, and the following phenomena are mentioned as problems. (1) When passing through a hole die, a part of the plating is peeled off to cause a defect in the plating. (2) The peeled plating clogs the hole die. (3) Oxide generated on the plating surface promotes abrasion of the die.
【０００６】これらの現象は、乾式伸線よりも湿式伸線
において生じ易く、また未加工のめっき金属線材が加工
される１パス目の穴ダイスおよびその下流の数パスのダ
イスにおいて特に顕著に生じ易い。これらの現象は最終
品質に悪影響を及ぼすのみならず、次パス目以降を含め
た穴ダイスでの伸線加工性を阻害し、引き抜き所要動力
の増加、ダイス寿命低下、断線等の問題を生じることが
ある。[0006] These phenomena are more likely to occur in wet drawing than in dry drawing, and particularly remarkably occur in the first pass hole die in which an unprocessed plated metal wire is processed and several downstream dies. easy. These phenomena not only have an adverse effect on the final quality, but also impair the wire drawing workability in the hole dies including the next pass and on, causing problems such as an increase in power required for drawing, a decrease in die life, and disconnection. There is.
【０００７】また、上記の悪影響を助長する要因とし
て、高強度なめっき金属線を得るための総伸線加工率の
増加や、熱拡散により拡散合金めっき層を形成させるた
めの加熱等が挙げられ、これらは、例えば、スチールコ
ード用の黄銅めっき鋼線の強度増加を阻害する一因でも
ある。Factors that promote the above-mentioned adverse effects include an increase in the total drawing rate for obtaining a high-strength plated metal wire, and heating for forming a diffusion alloy plating layer by thermal diffusion. These, for example, are also factors that hinder the increase in strength of brass-plated steel wires for steel cords.
【０００８】このようなめっき鋼線材の伸線加工特有の
問題の解決を図るべく、例えば、特開平８−１５５５３
２号公報には、少なくとも１パス目のダイスに適用する
水溶性潤滑液の極圧剤および油性剤の濃度を高めて伸線
加工する方法が開示されている。しかし、この方法の実
施に当たっては異なった組成の潤滑液を２種類使用する
ことが必要であり、潤滑液の特性の維持管理が煩雑とな
るという問題がある。[0008] In order to solve such a problem peculiar to wire drawing of a plated steel wire, for example, Japanese Patent Application Laid-Open No. 8-15553 is disclosed.
No. 2 discloses a method of performing wire drawing by increasing the concentration of an extreme pressure agent and an oil agent in a water-soluble lubricating liquid applied to at least a first-pass die. However, in carrying out this method, it is necessary to use two types of lubricating liquids having different compositions, and there is a problem that maintenance of the characteristics of the lubricating liquid becomes complicated.
【０００９】また、特開平８−２０９３８７号公報に
は、鋼素地の上に電気めっきを施した銅と亜鉛を熱拡散
により合金化するブラス拡散めっきにおいて、熱拡散前
のめっき粒子の大きさと熱拡散後の空隙の大きさを規定
し、空隙に伸線時の潤滑剤を貯留させることを特徴とす
るブラスめっき鋼線の製造方法が開示されている。しか
し、この方法では、空隙の大きさを所定の範囲に収める
ために熱拡散の条件が制限され、熱拡散の程度により調
節できるめっき特性の範囲が制限されるという欠点があ
る。例えば、ゴム製品補強用の黄銅めっき鋼線の製造に
おいては、めっきの熱拡散程度によるゴム接着特性の調
節範囲が制限されるため、対応可能なゴム組成範囲が狭
くなるという問題がある。Japanese Patent Application Laid-Open No. Hei 8-209387 discloses that in brass diffusion plating in which copper and zinc, which have been electroplated on a steel substrate, are alloyed by thermal diffusion, the size and thermal properties of plated particles before thermal diffusion. There is disclosed a method for producing a brass-plated steel wire, which defines the size of a void after diffusion and stores a lubricant during wire drawing in the void. However, this method has a drawback that the conditions of thermal diffusion are limited in order to keep the size of the void within a predetermined range, and the range of plating characteristics that can be adjusted by the degree of thermal diffusion is limited. For example, in the production of brass-plated steel wires for reinforcing rubber products, there is a problem in that the range of adjustment of rubber adhesive properties depending on the degree of thermal diffusion of plating is limited, and the applicable rubber composition range is narrowed.
【００１０】さらに、特開昭６１−１１７２８７号公報
には、鉄基材に拡散合金めっきを施す際に、未拡散のめ
っき層に圧縮加工を加えて実質的に穴のないものとした
後に熱拡散によりめっきを合金化し、冷間加工により所
望の線径のめっき金属線を得る方法が開示されている。
しかし、この方法において穴ダイス伸線等の冷間加工に
供されるめっき金属線材は熱拡散したままのものであ
り、めっき表面の酸化物が伸線加工性を阻害する場合が
ある。めっき表面の酸化物の悪影響を抑制する方法とし
て、穴ダイス伸線の前に酸等により洗浄して酸化物を除
去する方法や、熱拡散を非酸化性雰囲気で行い酸化物の
生成を抑制する方法等もあるが、これらの方法は環境あ
るいは設備コストの点で問題がある。Furthermore, Japanese Patent Application Laid-Open No. 61-117287 discloses that when a diffusion alloy plating is applied to an iron base material, the undiffused plating layer is subjected to a compression process so as to have substantially no holes, and then heat-treated. There is disclosed a method of alloying plating by diffusion and obtaining a plated metal wire having a desired wire diameter by cold working.
However, in this method, the plated metal wire to be subjected to cold working such as hole die wire drawing is still thermally diffused, and the oxide on the plated surface may hinder wire drawing workability. As a method of suppressing the adverse effect of the oxide on the plating surface, a method of removing the oxide by washing with an acid or the like before drawing the hole die, or suppressing the generation of the oxide by performing thermal diffusion in a non-oxidizing atmosphere. There are methods and the like, but these methods have problems in terms of environment or equipment cost.
【００１１】さらにまた、ローラー加工と穴ダイス加工
を組み合わせた高強力鋼線の製造方法として、例えば特
公平８−９７３４号公報には、成分を規定した高炭素鋼
線材を減面率５０％以上の伸線加工の途中で、または伸
線加工の最終段において、３５％以下の冷間圧延または
ローラーダイス引抜き加工を施す高強力鋼線の製造方法
が開示されている。しかし、この方法はめっき鋼線材の
穴ダイス伸線における第１パス目近傍に生じる前記問題
に解決策を与えるものではない。Further, as a method for producing a high-strength steel wire by combining roller processing and hole die processing, for example, Japanese Patent Publication No. Hei 8-9734 discloses a high-carbon steel wire rod with a defined component in a surface reduction rate of 50% or more. A method for producing a high-strength steel wire which is subjected to cold rolling or roller die drawing of 35% or less during the wire drawing or at the final stage of the wire drawing is disclosed. However, this method does not provide a solution to the above-described problem that occurs near the first pass in drawing a hole die of a plated steel wire.
【００１２】[0012]
【発明が解決しようとする課題】本発明の目的は、上記
の従来技術の問題点を解消し、伸線加工性に優れためっ
き鋼線材と、その製造方法として、潤滑液特性等の維持
管理が容易でかつめっき特性に基づく適用の範囲が広
く、しかも低コストの設備で実施可能な方法とを提供す
ることにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a plated steel wire excellent in wire drawing workability, and a method for producing the same by maintaining lubricating liquid characteristics and the like. It is an object of the present invention to provide a method that is easy to use, has a wide range of application based on plating characteristics, and can be implemented with low-cost equipment.
【００１３】[0013]
【課題を解決するための手段】上記課題を解決するため
に、請求項１の発明は伸線加工性に優れためっき鋼線材
であり、下地鋼線材と、その表面に形成されためっき層
とからなるめっき鋼線材において、該めっき層の表面
が、めっき粒子に基づく凹凸が実質的に存在しないよう
に平滑に減面率３％以下で圧縮加工されていることを特
徴とする。Means for Solving the Problems In order to solve the above problems, the invention of claim 1 is a plated steel wire excellent in wire drawing workability, comprising a base steel wire and a plating layer formed on the surface thereof. Wherein the surface of the plating layer is smoothly compression-processed at a surface reduction rate of 3% or less so that irregularities due to plating particles do not substantially exist.
【００１４】請求項２の発明は、伸線加工性に優れため
っき鋼線材であり、下地鋼線材と、その表面に形成され
ためっき層とからなるめっき鋼線材において、下地鋼線
材の表面凹凸に基づくめっき層表面凹凸を有し、少なく
ともめっき層の凸部の表面が、めっき粒子に基づく凹凸
が実質的に存在しないように平滑に減面率３％以下で圧
縮加工されていることを特徴とするめっき鋼線材であ
る。According to a second aspect of the present invention, there is provided a plated steel wire excellent in wire drawing workability, wherein the plated steel wire comprising a base steel wire and a plating layer formed on the surface thereof has a surface irregularity of the base steel wire. Characterized in that at least the surface of the projections of the plating layer is smoothly compressed at a surface reduction rate of 3% or less so that there is substantially no unevenness due to the plating particles. It is a plated steel wire rod.
【００１５】請求項３の発明は、請求項１または２の発
明において、下地鋼線材が高炭素鋼であり、めっき層が
黄銅めっきであるめっき鋼線材である。According to a third aspect of the present invention, in the first or second aspect, the base steel wire is a high-carbon steel and the plating layer is a brass-plated steel wire.
【００１６】請求項４の発明は、請求項３の発明におい
て、下地鋼線材の金属組織がパーライトであり、表面か
らの深さが１０μｍ以上の部分に実質的に加工歪みが無
いめっき鋼線材である。According to a fourth aspect of the present invention, there is provided the plated steel wire according to the third aspect of the invention, wherein the metal structure of the base steel wire is pearlite, and a portion having a depth from the surface of 10 μm or more has substantially no work distortion. is there.
【００１７】請求項５の発明は、鋼線材を所定の線径に
縮径加工して下地鋼線材となし、該下地鋼線材の表面に
略均一にめっき層を形成し、該めっき層に下地鋼線材の
減面率を３％以下とする圧縮加工を施すことを特徴とす
る請求項１または２の発明の伸線加工性に優れためっき
鋼線材の製造方法である。According to a fifth aspect of the present invention, a steel wire is reduced in diameter to a predetermined wire diameter to form a base steel wire, a plating layer is formed substantially uniformly on the surface of the base steel wire, and the base layer is formed on the plating layer. 3. A method for producing a plated steel wire excellent in wire drawing workability according to claim 1 or 2, wherein the steel wire is subjected to a compression working to reduce the area reduction rate to 3% or less.
【００１８】請求項６の発明は、請求項５の発明におい
て、鋼線材の縮径加工を乾式伸線にて行うめっき鋼線材
の製造方法である。According to a sixth aspect of the present invention, there is provided a method of manufacturing a plated steel wire according to the fifth aspect, wherein the diameter reduction of the steel wire is performed by dry drawing.
【００１９】請求項７の発明は、請求項５または６の発
明において、鋼線材を所定の線径に縮径加工した後に熱
処理により歪みを除去して下地鋼線材となすめっき鋼線
材の製造方法である。According to a seventh aspect of the present invention, in the method of the fifth or sixth aspect, the steel wire is reduced in diameter to a predetermined wire diameter, and then subjected to a heat treatment to remove distortion and to form a plated steel wire to form a base steel wire. It is.
【００２０】請求項８の発明は、請求項５、６または７
の発明において、鋼線材として高炭素鋼線材を用いるめ
っき鋼線材の製造方法である。The invention of claim 8 is the invention of claim 5, 6, or 7.
In the invention, a high-carbon steel wire is used as the steel wire to produce a plated steel wire.
【００２１】請求項９の発明は、請求項７の発明におい
て、鋼線材として高炭素鋼線材を用い、熱処理において
パーライト組織を形成せしめる記載のめっき鋼線材の製
造方法である。A ninth aspect of the present invention is the method for producing a plated steel wire according to the seventh aspect, wherein a high-carbon steel wire is used as the steel wire and a pearlite structure is formed by heat treatment.
【００２２】請求項１０の発明は、請求項８または９の
発明において、めっき層の形成において、銅と亜鉛を順
次析出させて熱拡散により黄銅めっき層となすめっき鋼
線材の製造方法である。A tenth aspect of the present invention is the method for producing a plated steel wire rod according to the eighth or ninth aspect of the present invention, wherein copper and zinc are sequentially deposited to form a brass plating layer by thermal diffusion in forming the plating layer.
【００２３】請求項１１の発明は、請求項５〜１０のう
ちいずれかの発明において、めっき層の圧縮加工を、対
向した溝付きローラー対間を少なくとも１回通過させる
ことにより行うめっき鋼線材の製造方法である。According to an eleventh aspect of the present invention, in any one of the fifth to tenth aspects of the present invention, the plating layer is compressed by passing at least once between a pair of opposed grooved rollers. It is a manufacturing method.
【００２４】請求項１２の発明は、請求項１１の発明に
おいて、めっき層の圧縮加工を潤滑剤を用いずに行う記
載のめっき鋼線材の製造方法である。According to a twelfth aspect of the present invention, there is provided the method for manufacturing a plated steel wire according to the eleventh aspect, wherein the compression processing of the plating layer is performed without using a lubricant.
【００２５】[0025]
【発明の実施の形態】以下、本発明を図面に基づき具体
的に説明する。従来のめっき鋼線材の表面には、析出し
ためっき粒子の形態を反映し、図３および４に示すよう
に微小な凹凸５が全面にわたって存在する。このために
伸線加工時にダイスとの接触が不均一となり、第１パス
目近傍においてめっきの一部脱落が生じやすい。特に、
図４に示すようにめっき表面４に大きな凹凸を有する場
合には、その凸部４ａとダイスとの接触圧力が高くなる
ために潤滑膜が薄くなり易く、めっきの脱落がさらに生
じやすい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. On the surface of the conventional plated steel wire rod, fine irregularities 5 are present on the entire surface as shown in FIGS. 3 and 4, reflecting the form of the deposited plating particles. For this reason, the contact with the die during the wire drawing becomes non-uniform, and a portion of the plating tends to fall off near the first pass. Especially,
As shown in FIG. 4, when the plating surface 4 has large irregularities, the contact pressure between the projections 4a and the dies increases, so that the lubricating film is easily thinned, and the plating is more likely to fall off.
【００２６】これに対して本発明のめっき鋼線材におい
ては、図１に示すようにダイスと接触する表面が平滑に
圧縮加工され、めっき粒子に基づく凹凸が実質的に存在
しないため、ダイスとの接触が均一となり、かつ下地鋼
線材１とめっき層２との密着性も良好であるために、め
っきの脱落が生じ難くなっている。On the other hand, in the plated steel wire rod of the present invention, as shown in FIG. 1, the surface in contact with the dies is pressed smoothly and there is substantially no unevenness due to plated particles. Since the contact is uniform and the adhesion between the base steel wire 1 and the plating layer 2 is also good, it is difficult for the plating to fall off.
【００２７】本発明のめっき鋼線材における、めっき粒
子に基づく凹凸が実質的に存在しない表面は、必ずしも
図１に示すように全面に存在する必要はない。すなわ
ち、図２に示すようにめっき層２の表面４に下地鋼線材
１に基づく凹凸を有する場合は、少なくともダイスとの
接触圧力が高くなる凸部４ａのめっきの表面が実質的に
平滑に圧縮加工されていればよい。この場合、めっき脱
落がし難いことに加え、凹部４ｂがあることで潤滑剤の
引き込み性も良好となり、さらに優れた伸線加工性を得
ることができる。The surface of the plated steel wire rod according to the present invention, which is substantially free from irregularities due to plated particles, need not necessarily be present on the entire surface as shown in FIG. That is, as shown in FIG. 2, when the surface 4 of the plating layer 2 has irregularities based on the base steel wire rod 1, at least the surface of the plating of the convex portion 4a at which the contact pressure with the die becomes high is substantially smoothly compressed. It may be processed. In this case, in addition to the difficulty in falling off of the plating, the presence of the concave portion 4b also improves the lubricity of the lubricant, and further excellent wire drawing workability can be obtained.
【００２８】本発明のめっき鋼線の下地鋼線材１として
は、例えば、軟鋼線、ステンレス鋼線、高炭素鋼線等を
使用することができ、まためっき層２の材質としては、
例えば、銅、亜鉛、ニッケル等の金属あるいは合金を適
用することができるが、下地鋼線剤１を高炭素鋼線材と
し、めっき層２を黄銅めっきとすれば、高強度でめっき
の欠陥が少なく、ゴムとの接着性に優れたスチールコー
ド等の補強材を効率良く経済的に製造することができ
る。As the base steel wire 1 of the plated steel wire of the present invention, for example, a mild steel wire, a stainless steel wire, a high carbon steel wire, or the like can be used.
For example, a metal or alloy such as copper, zinc, nickel or the like can be applied. However, if the base steel wire agent 1 is made of a high carbon steel wire and the plating layer 2 is made of brass plating, there is little plating defect with high strength. In addition, a reinforcing material such as a steel cord having excellent adhesion to rubber can be efficiently and economically manufactured.
【００２９】次に、本発明の伸線加工性に優れためっき
鋼線材の製造方法について説明する。まず、本発明にお
いては鋼線材を所定の線径に縮径加工して下地鋼線材１
となすが、この縮径加工の方法としては、圧延、湿式伸
線、乾式伸線等を適用することができる。Next, a method for producing a plated steel wire excellent in wire drawing workability of the present invention will be described. First, in the present invention, a steel wire rod is reduced in diameter to a predetermined wire diameter to obtain a base steel wire rod 1.
However, rolling, wet drawing, dry drawing and the like can be applied as a method of the diameter reduction processing.
【００３０】次に本発明においては、下地鋼線材１の表
面に略均一にめっき層２を形成するが、めっき層２の形
成方法としては、電気めっき、溶融めっき、拡散めっき
等のめっき法を適用することができる。また、めっき層
２の形成は縮径加工したままの下地鋼線材１に直接行っ
てもよいが、熱処理により縮径加工に起因する歪みを除
去してから行えばより良好な伸線加工性を付与すること
ができる。Next, in the present invention, the plating layer 2 is formed substantially uniformly on the surface of the base steel wire rod 1. The plating layer 2 may be formed by a plating method such as electroplating, hot-dip plating, or diffusion plating. Can be applied. Further, the formation of the plating layer 2 may be performed directly on the underlying steel wire rod 1 in which the diameter reduction processing has been performed. However, if the distortion caused by the diameter reduction processing is removed by heat treatment, better drawability can be obtained. Can be granted.
【００３１】さらに本発明においては、めっき層２に、
下地鋼線材１の減面率にして３％以下、好ましくは１％
以下の軽微な圧縮加工を施す。この圧縮加工の際に、工
具と接するめっき層表面が平滑化され、同時に表面酸化
物の減少がもたらされる。かかる圧縮加工においては、
加工量を軽微にして下地鋼線材１の変形量を極力少なく
することが肝要である。この理由は、圧縮加工量が過大
であると下地鋼線材１の変形に伴う温度上昇のために新
たに酸化物が形成され、表面酸化物の減少効果が損なわ
れるためである。また、縮径加工に起因する下地鋼線材
の歪みが熱処理により除去されている場合、圧縮加工量
が過大であると、下地鋼線材表面に過剰な加工歪みが導
入され、熱処理による歪み除去の効果が損なわれてしま
うことになる。めっき圧縮加工によって歪が導入される
深さは１０μｍ以下に抑制されていることが望ましく、
そのためにも下地鋼線材の減面率は３％以下とする必要
がある。Further, in the present invention, the plating layer 2
3% or less, preferably 1%, in terms of area reduction of base steel wire 1
The following slight compression processing is performed. During the compression working, the surface of the plating layer in contact with the tool is smoothed, and at the same time, the surface oxide is reduced. In such compression processing,
It is important to minimize the amount of processing to minimize the amount of deformation of the base steel wire rod 1. The reason for this is that if the amount of compression processing is excessive, an oxide is newly formed due to an increase in temperature accompanying the deformation of the base steel wire 1 and the effect of reducing surface oxides is impaired. In addition, when the distortion of the underlying steel wire due to the diameter reduction processing is removed by heat treatment, if the amount of compression processing is excessive, excessive working distortion is introduced into the surface of the underlying steel wire, and the effect of the heat treatment to remove the distortion is obtained. Will be impaired. It is desirable that the depth at which the strain is introduced by the plating compression working be suppressed to 10 μm or less,
For this purpose, the area reduction rate of the base steel wire rod needs to be 3% or less.
【００３２】めっき層２の圧縮加工の手段としては圧
延、ショットピーニング等も適用できるが、対向した溝
付きローラー対間を通過させることにより簡便にめっき
層２の圧縮加工を行うことができる。一般に大きな減面
率を設定した溝付きローラーによる線材加工は、断面形
状の精度を確保するために多数のローラー対を直列に並
べて行われているが、本発明におけるめっき層２の圧縮
加工においては減面率が小さく線材の断面形状に対する
影響は微小であるため、複数組でもよいが一組の溝付き
ローラー対でも十分であり、また潤滑剤を用いなくとも
実施することができる。Rolling, shot peening and the like can be applied as means for compressing the plating layer 2, but the compression processing of the plating layer 2 can be easily performed by passing between the opposed grooved roller pair. In general, wire processing by a grooved roller with a large area reduction rate is performed by arranging a large number of roller pairs in series in order to secure the accuracy of the cross-sectional shape. However, in the compression processing of the plating layer 2 in the present invention, Since the area reduction rate is small and the influence on the cross-sectional shape of the wire is small, a plurality of sets may be used, but one set of grooved roller pair is sufficient, and it can be carried out without using a lubricant.
【００３３】また、加工に要する動力も小さいため、め
っきラインの巻き取り部の前あるいはめっき鋼線材伸線
機の巻出し部の後にローラー対を設置すれば、別段の動
力装置を追加することなくめっき層２の圧縮加工を実施
することができる。Further, since the power required for processing is small, if a roller pair is installed before the winding portion of the plating line or after the unwinding portion of the plated steel wire drawing machine, no additional power device is required. The compression processing of the plating layer 2 can be performed.
【００３４】かかる圧縮加工により、図１に示すように
めっき層２の全面を平滑化してもよいが、めっき層２の
表面４に下地鋼線材１に基づく凸部４ａと凹部４ｂのう
ち凸部４ａのめっき表面のみを平滑に圧縮加工し、凹部
４ｂによる潤滑剤の引き込み性を向上させることによ
り、さらに優れた伸線加工性を有するめっき鋼線材を得
ることもできる。なお、この場合でも、凸部４ａと凹部
４ｂの形成のために別段の工程の追加を要するものでは
ない。Although the entire surface of the plating layer 2 may be smoothed as shown in FIG. 1 by such compression processing, the projections 4a and the depressions 4b based on the base steel wire rod 1 are formed on the surface 4 of the plating layer 2. By compressing only the plated surface 4a smoothly and improving the lubricity of the lubricant by the recess 4b, it is possible to obtain a plated steel wire having even better wire drawing workability. Note that, in this case, it is not necessary to add a separate step for forming the convex portion 4a and the concave portion 4b.
【００３５】すなわち、めっきを施す前の下地金属線材
１の表面には、圧延、伸線加工あるいは熱処理等のそれ
までの製造履歴に起因し金属組織の状態を反映した凹凸
３が通常存在する。この凹凸３に沿って略均一にめっき
層２を形成することにより、めっき層２の表面４には下
地鋼線材１の表面凹凸３を反映した凹凸が形成され、図
４に示すような表面状態となる。かかるめっき鋼線材に
軽微な圧縮加工を施すことにより、図２に示すようにめ
っき層２に凸部４ａと凹部４ｂを存在させつつ、凸部４
ａのめっき表面を平滑に圧縮加工することができる。That is, the surface of the base metal wire 1 before plating is usually provided with irregularities 3 reflecting the state of the metal structure due to the manufacturing history up to that point, such as rolling, drawing or heat treatment. By forming the plating layer 2 substantially uniformly along the irregularities 3, irregularities reflecting the surface irregularities 3 of the underlying steel wire 1 are formed on the surface 4 of the plating layer 2, and the surface state as shown in FIG. Becomes By performing a slight compression process on the plated steel wire rod, as shown in FIG.
The plating surface of a can be smoothly compressed.
【００３６】この場合、圧縮加工に先立つめっき形成に
おいてめっき層が厚過ぎると、めっき厚さの均一性が損
なわれて表面凸部４ａと凹部４ｂの高低差が過小となっ
てしまい、図３に示すような表面状態となってしまう
が、下地鋼線材１の製造における縮径加工を乾式伸線に
て行うと、ダイスと鋼線材間の潤滑膜を厚くできるため
に高低差の大きい表面凹凸３を形成させることができ、
より厚いめっき層を形成しても凸部４ａと凹部４ｂを存
在させつつ、凸部４ａのめっきの表面のみを平滑に圧縮
加工することができる。In this case, if the plating layer is too thick in the plating formation prior to the compression working, the uniformity of the plating thickness is impaired, and the height difference between the surface convex portions 4a and the concave portions 4b becomes too small. However, if the diameter reduction in the production of the base steel wire 1 is performed by dry drawing, the lubricating film between the die and the steel wire can be thickened, so that the surface unevenness 3 having a large difference in elevation is increased. Can be formed,
Even if a thicker plating layer is formed, only the surface of the plating of the projections 4a can be smoothly compressed while the projections 4a and the depressions 4b are present.
【００３７】本発明のめっき鋼線材の製造方法において
は、下地鋼線材１の材質を高炭素鋼とし、熱処理をパー
ライトを形成するパテンティング処理とし、さらにめっ
き層２の形成を銅めっき層と亜鉛めっき層を順次形成し
て熱拡散することにより黄銅めっき層とすることで、ゴ
ム製品補強用スチールコード等の製造に好適な、伸線加
工性に優れためっき鋼線材を、低コストの設備で容易に
製造することができる。また、この製造に際し、熱拡散
条件が制限されることがないため、広い範囲のゴム組成
に対応して、好適な接着性となるめっきの熱拡散程度と
なるように熱拡散条件を調節することができる。さら
に、熱拡散時の加熱によって生じた酸化物を減少させる
ことができるために、ダイス摩耗に対する悪影響も緩和
され、総伸線加工率の増加による高強度な黄銅めっき鋼
線の製造が容易となる。In the method of manufacturing a plated steel wire according to the present invention, the material of the base steel wire 1 is made of high carbon steel, the heat treatment is a patenting treatment for forming pearlite, and the plating layer 2 is formed of a copper plating layer and zinc. By forming a plating layer sequentially and thermally diffusing it into a brass plating layer, it is possible to produce a plated steel wire rod with excellent wire drawing workability suitable for manufacturing steel cords for reinforcing rubber products, etc. with low cost equipment. It can be easily manufactured. In addition, since the heat diffusion conditions are not limited in this production, the heat diffusion conditions should be adjusted so that the degree of heat diffusion of the plating that provides suitable adhesiveness is adjusted to a wide range of rubber composition. Can be. Furthermore, since oxides generated by heating during thermal diffusion can be reduced, adverse effects on die wear are alleviated, and the production of high-strength brass-plated steel wires due to an increase in the total drawing ratio is facilitated. .
【００３８】[0038]
【実施例】次に、本発明を実施例に基づき具体的に説明
する。ゴム製品補強用スチールコードの製造等に用いら
れる黄銅めっきの製造例に基づき以下に説明する。Next, the present invention will be specifically described based on examples. The following description is based on a production example of brass plating used for producing a steel cord for reinforcing rubber products.
【００３９】直径約３．２ｍｍで０．８２重量％の炭素
を含む高炭素鋼線材を、直径約１．５２ｍｍまで乾式伸
線した後、パテンティング処理によりパーライト組織と
なし、下地鋼線材を得た。次いで、この下地鋼線材に黄
銅めっき処理を施してめっき層を形成し、下記の表１に
示す黄銅めっき鋼線材を得た。尚、黄銅めっき処理はパ
テンティング処理と連続して行い、銅および亜鉛を順次
電気めっきした後に通電加熱により銅と亜鉛を拡散させ
て黄銅めっき層とした。A high-carbon steel wire having a diameter of about 3.2 mm and containing 0.82% by weight of carbon is dry-drawn to a diameter of about 1.52 mm, and a pearlite structure is formed by a patenting process to obtain a base steel wire. Was. Next, a brass plating treatment was performed on the base steel wire to form a plating layer, and a brass-plated steel wire shown in Table 1 below was obtained. The brass plating process was performed continuously with the patenting process. After copper and zinc were sequentially electroplated, copper and zinc were diffused by heating to form a brass plating layer.
【００４０】[0040]
【表１】 [Table 1]
【００４１】得られためっき鋼線材の表面は図４に示す
ような状態であり、下地鋼線材の表面には高低差および
周期が数μｍオーダーの凹凸３があり、めっき層は該凹
凸３に沿って厚さ約１μｍの略均一な厚さに形成されて
凸部４ａと凹部４ｂを有し、さらに、０．１μｍオーダ
ーの微小な凹凸５が全面に亘り存在した。ここで、表面
状況の判定は、以下で述べるめっき圧縮加工部前後のめ
っき鋼線材を採取し、各々のめっき表面およびめっき除
去後の下地線材の表面をＳＥＭにて比較観察することに
より行った。The surface of the plated steel wire obtained is in the state as shown in FIG. 4, and the surface of the underlying steel wire has irregularities 3 with a height difference and a period of several μm order. The protrusions 4a and the recesses 4b were formed in a substantially uniform thickness of about 1 μm along the entire surface, and fine irregularities 5 on the order of 0.1 μm were present over the entire surface. Here, the determination of the surface condition was performed by collecting plated steel wires before and after the plating compression processing portion described below, and comparing and observing each plated surface and the surface of the underlying wire after plating removal by SEM.
【００４２】この黄銅めっき鋼線材を対向した溝付きロ
ーラー対間を種々の条件で潤滑剤を使用せずに通過させ
て、めっき圧縮加工を施した。各々のめっき圧縮加工条
件を下記の表２に示す。表２において、番号１から３は
本発明による実施例であり、番号４はめっき圧縮加工を
過大とした比較例である。また、番号５は従来法による
ものである。The brass-plated steel wire rod was passed through a pair of grooved rollers facing each other under various conditions without using a lubricant, and subjected to plating compression. Table 2 below shows the respective plating compression working conditions. In Table 2, Nos. 1 to 3 are examples according to the present invention, and No. 4 is a comparative example in which plating compression processing was excessive. The number 5 is based on the conventional method.
【００４３】[0043]
【表２】 [Table 2]
【００４４】各々のめっき鋼線材の表面をＳＥＭにて比
較観察したところ、実施例１〜３のめっき鋼線材の表面
は図２に示すような状態であり、めっき層２の表面４に
は凸部４ａと凹部４ｂがあり、かつ凸部４ａのめっきは
ローラーによって平滑化されていた。また、下記の表３
に示すように表面酸化物量は従来例対比約６０％以下に
減少した。When the surfaces of the plated steel wires were compared and observed by SEM, the surfaces of the plated steel wires of Examples 1 to 3 were in a state as shown in FIG. There was a portion 4a and a concave portion 4b, and the plating of the convex portion 4a was smoothed by a roller. Table 3 below
As shown in the figure, the surface oxide amount was reduced to about 60% or less as compared with the conventional example.
【００４５】[0045]
【表３】 [Table 3]
【００４６】さらに、めっき鋼線材の伸線加工性を評価
するために、各々のめっき鋼線材を穴ダイスにて１パス
引き抜き、引き抜き力を従来例を１００として指数にて
評価した。数値が小さい程引き抜き力が小さいことを示
す。なお減面率は約６％とした。得られた測定結果を下
記の表４に示す。Further, in order to evaluate the wire drawing workability of the plated steel wire, each plated steel wire was drawn with a hole die for one pass, and the drawing force was evaluated by an index with the conventional example being 100. The smaller the value, the smaller the pull-out force. The area reduction rate was about 6%. The measurement results obtained are shown in Table 4 below.
【００４７】[0047]
【表４】 [Table 4]
【００４８】表４から明らかなように、実施例１〜３の
めっき鋼線材の引き抜き力は、従来例対比大幅に減少し
た。これに対し、比較例のめっき鋼線材の引き抜き力
は、従来例対比減少しなかった。また、従来例によるめ
っき鋼線材を引き抜いた穴ダイスの内面には、めっき脱
落に起因する黄銅の付着が認められた。As is clear from Table 4, the pull-out force of the plated steel wires of Examples 1 to 3 was greatly reduced as compared with the conventional example. On the other hand, the pulling force of the plated steel wire of the comparative example did not decrease as compared with the conventional example. Further, on the inner surface of the hole die from which the plated steel wire according to the conventional example was pulled out, the adhesion of brass due to the falling off of the plating was observed.
【００４９】[0049]
【発明の効果】以上説明してきたように、本発明のめっ
き鋼線材は穴ダイス伸線加工時の良好な潤滑性とめっき
脱落し難い特質をもつために、第１パス目近傍で顕著に
生じ易いめっき鋼線材伸線特有の問題をすべて解決する
ことができる。これによって次パス以降の伸線加工性も
改善されるため、穴ダイス伸線の総減面率を高くするこ
とができ、より高強度のめっき鋼線材の製造が容易とな
る。As described above, the plated steel wire rod according to the present invention has good lubricity at the time of drawing a hole die and has the property that the plating hardly falls off. It can solve all problems peculiar to wire drawing of coated steel wire. Thereby, the wire drawing workability after the next pass is also improved, so that the total area reduction rate of the hole die wire drawing can be increased, and the production of a higher strength plated steel wire can be facilitated.
【００５０】また、本発明の伸線加工性に優れためっき
鋼線材の製造方法は、低コストの設備で、生産性を阻害
することなく実施でき、高品質のめっき鋼線を経済的に
製造することができる。Further, the method of the present invention for producing a plated steel wire excellent in wire drawing workability can be carried out with low-cost equipment without impairing the productivity, and a high-quality plated steel wire can be economically produced. can do.
【００５１】さらに、本発明をスチールコード等のゴム
補強材に用いられる黄銅めっき高炭素鋼線の製造に適用
すれば、ゴム組成に対応する接着特性の調整幅を狭める
ことなく、高強度の補強材を経済的に製造することがで
きる。Further, when the present invention is applied to the production of brass-plated high carbon steel wires used for rubber reinforcing materials such as steel cords, high-strength reinforcement can be achieved without narrowing the adjustment range of the adhesive properties corresponding to the rubber composition. The material can be manufactured economically.
【図１】本発明のめっき鋼線材の一例の表面近傍の状況
の説明図である。FIG. 1 is an explanatory view of a situation near a surface of an example of a plated steel wire rod of the present invention.
【図２】本発明のめっき鋼線材の別な例の表面近傍の状
況の説明図である。FIG. 2 is an explanatory view of the situation near the surface of another example of the plated steel wire rod of the present invention.
【図３】従来のめっき鋼線材の一例の表面近傍の状況の
説明図である。FIG. 3 is an explanatory view of a situation near the surface of an example of a conventional plated steel wire.
【図４】従来のめっき鋼線材の別な例の表面近傍の状況
の説明図である。FIG. 4 is an explanatory view of a situation near the surface of another example of the conventional plated steel wire rod.
１ 下地鋼線材 ２ めっき層 ３ 下地鋼線材の表面凹凸 ４ めっき層の表面 ４ａ めっき層表面の凸部 ４ｂ めっき層表面の凹部 ５ めっき層の微小凹凸 DESCRIPTION OF SYMBOLS 1 Base steel wire rod 2 Plating layer 3 Surface unevenness of base steel wire rod 4 Surface of plating layer 4a Convex part of plating layer surface 4b Concave part of plating layer surface 5 Micro unevenness of plating layer
Claims (12)
っき層とからなるめっき鋼線材において、該めっき層の
表面が、めっき粒子に基づく凹凸が実質的に存在しない
ように平滑に減面率３％以下で圧縮加工されていること
を特徴とする伸線加工性に優れためっき鋼線材。1. A plating steel wire rod comprising a base steel wire rod and a plating layer formed on the surface thereof, wherein the surface of the plating layer is smoothly reduced so that irregularities due to plating particles are not substantially present. A plated steel wire excellent in drawability, characterized in that it is compressed at a rate of 3% or less.
っき層とからなるめっき鋼線材において、下地鋼線材の
表面凹凸に基づくめっき層表面凹凸を有し、少なくとも
めっき層の凸部の表面が、めっき粒子に基づく凹凸が実
質的に存在しないように平滑に減面率３％以下で圧縮加
工されていることを特徴とする伸線加工性に優れためっ
き鋼線材。2. A plated steel wire comprising an underlying steel wire and a plating layer formed on the surface thereof, wherein the plated steel wire has surface irregularities of the plating layer based on the surface irregularities of the underlying steel wire, and at least the surface of the convex portion of the plating layer. A coated steel wire excellent in wire drawability, characterized in that the coated steel wire is smoothly pressed at a surface reduction rate of 3% or less so that unevenness due to plated particles does not substantially exist.
が黄銅めっきである請求項１または２記載のめっき鋼線
材。3. The plated steel wire according to claim 1, wherein the base steel wire is high carbon steel, and the plating layer is brass plating.
り、表面からの深さが１０μｍ以上の部分に実質的に加
工歪みが無い請求項３記載のめっき鋼線材。4. The plated steel wire according to claim 3, wherein the metal structure of the base steel wire is pearlite, and a portion having a depth of 10 μm or more from the surface has substantially no processing strain.
鋼線材となし、該下地鋼線材の表面に略均一にめっき層
を形成し、該めっき層に下地鋼線材の減面率を３％以下
とする圧縮加工を施すことを特徴とする請求項１または
２記載の伸線加工性に優れためっき鋼線材の製造方法。5. A steel wire rod is reduced in diameter to a predetermined wire diameter to form a base steel wire rod, a plating layer is formed substantially uniformly on the surface of the base steel wire rod, and the surface of the base steel wire rod is reduced on the plating layer. 3. The method for producing a plated steel wire excellent in wire drawability according to claim 1 or 2, wherein compression is performed to reduce the rate to 3% or less.
求項５記載のめっき鋼線材の製造方法。6. The method for producing a plated steel wire according to claim 5, wherein the diameter reduction of the steel wire is performed by dry drawing.
熱処理により歪みを除去して下地鋼線材となす請求項５
または６記載のめっき鋼線材の製造方法。7. A steel wire rod is reduced in diameter to a predetermined wire diameter, and then heat-treated to remove distortion to form a base steel wire rod.
Or a method for producing a plated steel wire according to item 6.
項５、６または７記載のめっき鋼線材の製造方法。8. The method for producing a plated steel wire according to claim 5, wherein a high carbon steel wire is used as the steel wire.
理においてパーライト組織を形成せしめる請求項７記載
のめっき鋼線材の製造方法。9. The method for producing a plated steel wire according to claim 7, wherein a high carbon steel wire is used as the steel wire, and a pearlite structure is formed in the heat treatment.
順次析出させて熱拡散により黄銅めっき層となす請求項
８または９記載のめっき鋼線材の製造方法。10. The method for producing a plated steel wire according to claim 8, wherein in forming the plating layer, copper and zinc are sequentially deposited to form a brass plating layer by thermal diffusion.
きローラー対間を少なくとも１回通過させることにより
行う請求項５〜１０のうちいずれか一項記載のめっき鋼
線材の製造方法。11. The method for producing a plated steel wire according to claim 5, wherein the compression processing of the plating layer is performed by passing at least once between the pair of grooved rollers facing each other.
に行う請求項１１記載のめっき鋼線材の製造方法。12. The method for producing a plated steel wire according to claim 11, wherein the compression processing of the plating layer is performed without using a lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00601997A JP4107692B2 (en) | 1997-01-17 | 1997-01-17 | Plating steel wire excellent in wire drawing workability and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00601997A JP4107692B2 (en) | 1997-01-17 | 1997-01-17 | Plating steel wire excellent in wire drawing workability and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10204683A true JPH10204683A (en) | 1998-08-04 |
| JP4107692B2 JP4107692B2 (en) | 2008-06-25 |
Family
ID=11626989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00601997A Expired - Fee Related JP4107692B2 (en) | 1997-01-17 | 1997-01-17 | Plating steel wire excellent in wire drawing workability and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4107692B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100353160B1 (en) * | 1999-12-11 | 2002-09-18 | 고려제강 주식회사 | Brass coated steel wire having good coiliability for spring |
| JP2008036678A (en) * | 2006-08-08 | 2008-02-21 | Bridgestone Corp | Manufacturing method of brass-plated steel wire, steel cord and tire |
| JP2013049921A (en) * | 2011-08-30 | 2013-03-14 | Rohm & Haas Electronic Materials Llc | Adhesion promotion of cyanide-free white bronze |
| JP2018094560A (en) * | 2016-12-08 | 2018-06-21 | 株式会社ノブハラ | Plated completion wire rod |
-
1997
- 1997-01-17 JP JP00601997A patent/JP4107692B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100353160B1 (en) * | 1999-12-11 | 2002-09-18 | 고려제강 주식회사 | Brass coated steel wire having good coiliability for spring |
| JP2008036678A (en) * | 2006-08-08 | 2008-02-21 | Bridgestone Corp | Manufacturing method of brass-plated steel wire, steel cord and tire |
| JP2013049921A (en) * | 2011-08-30 | 2013-03-14 | Rohm & Haas Electronic Materials Llc | Adhesion promotion of cyanide-free white bronze |
| JP2018094560A (en) * | 2016-12-08 | 2018-06-21 | 株式会社ノブハラ | Plated completion wire rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4107692B2 (en) | 2008-06-25 |
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