JPH02295626A - Production of corrosion resistant plated steel wire - Google Patents
Production of corrosion resistant plated steel wireInfo
- Publication number
- JPH02295626A JPH02295626A JP11706389A JP11706389A JPH02295626A JP H02295626 A JPH02295626 A JP H02295626A JP 11706389 A JP11706389 A JP 11706389A JP 11706389 A JP11706389 A JP 11706389A JP H02295626 A JPH02295626 A JP H02295626A
- Authority
- JP
- Japan
- Prior art keywords
- steel wire
- wire
- plated steel
- resistant plated
- corrosion
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 230000007797 corrosion Effects 0.000 title claims abstract description 34
- 238000005260 corrosion Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000007747 plating Methods 0.000 claims abstract description 21
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005246 galvanizing Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 31
- 238000005491 wire drawing Methods 0.000 claims description 30
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 239000011701 zinc Substances 0.000 description 8
- 229910001335 Galvanized steel Inorganic materials 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000008397 galvanized steel Substances 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 235000005074 zinc chloride Nutrition 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は海岸地帯及び湿潤環境等においてフェンス及び
ワイヤロープ等に使用される耐食めっき鋼線の製造方法
に関し、特に表面平滑性及び機械的強度が優れた耐食め
っき鋼線の製造方法に関する。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method for manufacturing corrosion-resistant plated steel wire used for fences, wire ropes, etc. in coastal areas and humid environments, and particularly relates to a method for manufacturing corrosion-resistant plated steel wire used for fences, wire ropes, etc. The present invention relates to a method for manufacturing a corrosion-resistant plated steel wire with excellent corrosion resistance.
［従来の技術］
従来、耐食性が優れためっき鋼線としては、鋼芯線の周
面に溶融弗鉛めっきを施した溶融亜鉛めっき鋼線がある
。また、この溶融亜鉛めっき鋼線の耐食性を更に一層改
善した耐食めっき鋼線として、溶融亜鉛めっき後に溶融
アルミニウムー亜鉛合金めっきを施した耐食めっき鋼線
が提案されている。（大羽，落合他“材料とプロセス”
Ｖｏｌ．１１９８７ Ｓ１１８８）。この溶融アルミニ
ウムー亜鉛合金めっき層を有する耐食めっき鋼線は、以
下に説明する方法により製造している。[Prior Art] Conventionally, as a plated steel wire with excellent corrosion resistance, there is a hot-dip galvanized steel wire in which the peripheral surface of a steel core wire is coated with hot-dip fluoride. Furthermore, as a corrosion-resistant plated steel wire that further improves the corrosion resistance of this hot-dip galvanized steel wire, a corrosion-resistant plated steel wire that is subjected to hot-dip aluminum-zinc alloy plating after hot-dip galvanization has been proposed. (Oba, Ochiai et al. “Materials and Processes”
Vol. 11987 S1188). This corrosion-resistant plated steel wire having a hot-dip aluminum-zinc alloy plating layer is manufactured by the method described below.
先ず、芯線となる鋼線を酸洗した後、塩化亜鉛の水溶液
に浸漬してフラックス処理を行う。First, a steel wire serving as a core wire is pickled, and then immersed in an aqueous solution of zinc chloride to perform a flux treatment.
次に、この鋼線を高純度亜鉛の溶融洛中を通過させるこ
とにより、通常の溶融亜鉛めっきを施す。Next, this steel wire is passed through a high-purity zinc molten medium to undergo normal hot-dip galvanizing.
これにより、鋼線の周面にＦｅ−Ｚｎ金属間化合物層が
形成される。As a result, an Fe-Zn intermetallic compound layer is formed on the circumferential surface of the steel wire.
次いで、３乃至ｌＯ重量％程度のアルミニウムを含宵す
る亜鉛浴槽中へこの溶融亜鉛めっき鋼線を浸漬する。こ
れにより、前記Ｆｅ−Ｚｎ金属間化合物層中にＡ！が拡
散浸透してＦｅ−Ｚｎ−Ａノ化合物層が形成されると共
に、このＦｅ−Ｚｎ’−Ａ！化合物層の外側にＡｌ−Ｚ
ｎ合金めっき層が形成される。The hot-dip galvanized steel wire is then immersed in a zinc bath containing aluminum on the order of 3 to 10% by weight. As a result, A! is present in the Fe-Zn intermetallic compound layer. diffuses and permeates to form a Fe-Zn-A compound layer, and this Fe-Zn'-A! Al-Z on the outside of the compound layer
An n-alloy plating layer is formed.
このようにして形成された２層の合金めっき層を有する
耐食めっき鋼線は、耐食性が優れていると共に、伸線加
工性も優れている。The corrosion-resistant plated steel wire having two alloy plating layers thus formed has excellent corrosion resistance and wire drawability.
［発明が解決しようとする課題コ
しかしながら、上述の２層の合金めっき層を有する耐食
めっき鋼線は、その周面に凹凸が形成されるため、その
ままでは平滑性が悪く、撚合わせ加工等の後工程におい
て、撚線の外径が一定にならない。このため、撚線とす
るためにはこの耐食めっき鋼線を伸線加工し、その周面
を平滑化する必要がある。しかし、この耐食めっき鋼線
は伸線加工により、例えば捻回試験において破断するま
での捻回回数が低下する等、伸線加工前に比して機械的
特性が劣化するという問題点がある。[Problems to be Solved by the Invention] However, since the above-mentioned corrosion-resistant plated steel wire having two alloy plating layers has unevenness formed on its circumferential surface, its smoothness is poor as it is, and it is difficult to process such as twisting. In the post-process, the outer diameter of the stranded wire does not become constant. Therefore, in order to make a stranded wire, it is necessary to draw the corrosion-resistant plated steel wire and smooth the peripheral surface. However, this corrosion-resistant plated steel wire has a problem in that the mechanical properties of the wire are deteriorated by wire drawing compared to before the wire drawing, for example, the number of twists until breakage in a twisting test is reduced.
本発明はかかる問題点に鑑みてなされたものであって、
耐食性が優れていると共に、表面平滑性及び機械的特性
が優れた耐食めっき鋼線の製造方法を提供することを目
的とする。The present invention has been made in view of such problems, and includes:
An object of the present invention is to provide a method for manufacturing a corrosion-resistant plated steel wire that has excellent corrosion resistance, surface smoothness, and mechanical properties.
［課題を解決するための手段コ
本発明に係る耐食めっき鋼線の製造方法は、鋼線の周面
に溶融亜鉛めっきを施す工程と、溶融アルミニウムー亜
鉛合金めっきを施す工程と、複数回の伸線加工を行う工
程とを有し、前記複数回の伸線加工の最初の回の伸線加
工における断面減少率がｌθ％以下であり、最終回の伸
線加工終了後の全断面減少率が５０％以下であることを
特徴とする。[Means for Solving the Problems] The method for manufacturing a corrosion-resistant plated steel wire according to the present invention includes a step of hot-dip galvanizing the circumferential surface of a steel wire, a step of hot-dip aluminum-zinc alloy plating, and a plurality of steps. and a step of performing a wire drawing process, wherein the cross-sectional reduction rate in the first wire drawing process of the plurality of wire drawing processes is lθ% or less, and the total cross-sectional reduction rate after the final wire drawing process is completed. is 50% or less.
［作用］
本発明においては、鋼線の周面に溶融亜鉛めっき及び溶
融アルミニウムー亜鉛合金めっきを施した後、複数回の
伸線加工を行う。この場合、第１回目の伸線加工におけ
る断面減少率は！０％以下である。この第１回目の伸線
加工はめっき層表面の凹凸をなくすために行うものであ
る。この第１回目の伸線加工における断面減少率がｌθ
％を超えると、耐食めっき鋼線の機械的特性が著しく劣
化する。これは、断面減少率カ月０％を超えると、めっ
き層の表面に存在する凹凸のため、伸線加工時にめっき
層の周面は圧力を受け、この圧力がめつき層を介して鋼
線（芯線）の線径を変動させるためと考えられる。従っ
て、第１回目の仲線加工における断面減少率はｌＯ％以
下とする。[Function] In the present invention, the peripheral surface of the steel wire is subjected to hot-dip galvanizing and hot-dip aluminum-zinc alloy plating, and then wire drawing is performed multiple times. In this case, the cross-section reduction rate in the first wire drawing process is! It is 0% or less. This first wire drawing process is performed to eliminate unevenness on the surface of the plating layer. The cross-sectional reduction rate in this first wire drawing process is lθ
%, the mechanical properties of the corrosion-resistant plated steel wire will deteriorate significantly. This is because when the area reduction rate exceeds 0% per month, the surrounding surface of the plating layer is subjected to pressure during wire drawing due to the unevenness existing on the surface of the plating layer, and this pressure is applied to the steel wire (core wire) through the plating layer. ) is thought to be caused by varying the wire diameter. Therefore, the cross-sectional reduction rate in the first center wire processing is set to be 10% or less.
また、最終回の伸線加工後の耐食めっき鋼線の伸線加工
前に対する断面減少率（以下、全断面減少率という）は
５０％以下である。全断面減少率が５０％を超えて伸線
加工を行うと、めっき層と鋼線との境界面が平滑でなく
凹凸を有する面となり、このため耐食めっき鋼線の機械
的特性が劣化する。Further, the cross-sectional reduction rate of the corrosion-resistant plated steel wire after the final wire drawing process compared to before the wire drawing process (hereinafter referred to as the total cross-sectional reduction rate) is 50% or less. If wire drawing is performed with a total cross-sectional reduction rate of more than 50%, the interface between the plating layer and the steel wire will not be smooth but will have irregularities, resulting in deterioration of the mechanical properties of the corrosion-resistant plated steel wire.
従って、伸線加工終了後の全断面減少率は５０％以下と
する。Therefore, the total cross-sectional reduction rate after wire drawing is 50% or less.
［実施例］ 次に、本発明の実施例について説明する。[Example] Next, examples of the present invention will be described.
先ず、通常の亜鉛めっきの場合と同様に、芯線となる鋼
線に鉛パテンティング処理を施し、その後、脱脂、酸洗
及びフラックス処理を行う。そして、この鋼線を高純度
の亜鉛を溶融した槽中に浸漬し、一定の速度で引上げる
。これにより、鋼線の周面に溶融亜鉛めっきが施され、
Ｆｅ−Ｚｎ合金層が形成される。First, the steel wire serving as the core wire is subjected to lead patenting treatment, and then degreased, pickled, and fluxed, as in the case of normal galvanizing. The steel wire is then immersed in a bath containing molten high-purity zinc and pulled up at a constant speed. As a result, hot-dip galvanizing is applied to the circumferential surface of the steel wire,
A Fe-Zn alloy layer is formed.
次に、再度脱脂処理を行う。その後、この亜鉛めっき鋼
線をアルミニウムー亜鉛溶融槽中に浸漬し引上げる。こ
れにより、アルミニウムが亜鉛めっき層中に拡散してＦ
ｅ−Ｚｎ−Ａｊ合金層が形成されると共に、この合金層
を被覆してＡｊ−Ｚｎ合金層が形成される。このとき、
このめっき鋼線の周面は凹凸が激しい面となる。これは
Ａ！−Ｚｎ合金は純亜鉛と異なって凝固温度が一定の温
度ではなく、凝固温度に幅があるため、比較的早く凝固
した部分と遅《凝固した部分でめっき層の厚さが異なる
ためと考えられる。Next, degreasing is performed again. Thereafter, this galvanized steel wire is dipped into an aluminum-zinc melting bath and pulled up. This causes aluminum to diffuse into the galvanized layer and F
An e-Zn-Aj alloy layer is formed, and an Aj-Zn alloy layer is formed covering this alloy layer. At this time,
The circumferential surface of this plated steel wire becomes a highly uneven surface. This is A! -Different from pure zinc, the solidification temperature of Zn alloy is not a constant temperature, but has a wide range of solidification temperatures, and this is thought to be due to the difference in the thickness of the plating layer between areas that solidify relatively quickly and those that solidify slowly. .
次いで、このめっき鋼線を複数回伸線加工して所望の線
径にする。このとき、最初の伸線加工は断面減少率を１
０％以下にする。その後、通常の１パス当たりＩＯ乃至
２０％の断面減少率で伸線加工を行う。この場合、最終
の線径が伸線加工前の断面積に対して５０％以内の断面
減少率となるように、予め、伸線加工前のめっき鋼線の
線径を決定しておく。このようにして、表面平滑性及び
機械的特性が優れた耐食めっき鋼線が得られる。Next, this plated steel wire is drawn multiple times to obtain a desired wire diameter. At this time, the first wire drawing process reduces the area reduction rate to 1
Keep it below 0%. Thereafter, wire drawing is performed at a normal cross-section reduction rate of IO to 20% per pass. In this case, the wire diameter of the plated steel wire before wire drawing is determined in advance so that the final wire diameter has a cross-sectional reduction rate of 50% or less with respect to the cross-sectional area before wire drawing. In this way, a corrosion-resistant plated steel wire with excellent surface smoothness and mechanical properties can be obtained.
次に、本発明に係る耐食めっき鋼線を実際に製造し、比
較例と比較した結果について説明する。Next, the results of actually manufacturing the corrosion-resistant plated steel wire according to the present invention and comparing it with a comparative example will be described.
先ず、芯線としてＪＩＳ Ｇ ３５０８ ＳＷＲＩ１
５２硬鋼線材を使用し、この鋼線に鉛パテンティング処
理を施した。その後、この鋼線にアルカリ脱脂、酸洗及
び塩化亜鉛フラックス処理を施した。そして、この鋼線
を３０ｍ／分の速度で純亜鉛の溶融槽へ浸漬した後、引
上げて溶融亜鉛めっきを行った。First, JIS G 3508 SWRI1 is used as the core wire.
52 hard steel wire rod was used, and this steel wire was subjected to lead patenting treatment. Thereafter, this steel wire was subjected to alkaline degreasing, pickling, and zinc chloride flux treatment. Then, this steel wire was dipped into a pure zinc melting bath at a speed of 30 m/min, then pulled up and hot-dip galvanized.
次に、この亜鉛めっき鋼線を再度脱脂した。その後、こ
の亜鉛めっき鋼線を３０ｍ／分の速度でアルミニウムを
４重量％含何するアルミニウムー亜鉛溶融槽中に浸漬し
た後、引上げて八ノーＺｎ合金めっきを施した。このと
き、後工程の伸線加工終了後における実施例及び比較例
の各耐食めっき鋼線の線径を２ｍｍに統一するために、
伸線加工前の各めっき鋼線の線径を変えた。即ち、伸線
加工終了後の全断面減少率を３０％とする場合はめっき
鋼線のめっき仕上がり径を約２．４ｖａｓとし、全断面
減少率を４３％とする場合はめっき仕上がり径を２．８
＋ｎとし、全断面減少率を５６％とする場合はめっき仕
上がり径を３，０龍とした。Next, this galvanized steel wire was degreased again. Thereafter, this galvanized steel wire was immersed at a speed of 30 m/min in an aluminum-zinc melting bath containing 4% by weight of aluminum, and then pulled out and subjected to Hachino Zn alloy plating. At this time, in order to standardize the wire diameter of each corrosion-resistant plated steel wire of the example and comparative example to 2 mm after the wire drawing process in the post-process,
The wire diameter of each plated steel wire before wire drawing was changed. That is, when the total cross-sectional reduction rate after wire drawing is 30%, the plated finished diameter of the plated steel wire is approximately 2.4 vas, and when the total cross-sectional reduction rate is 43%, the plated finished diameter is approximately 2.4 vas. 8
+n, and when the total cross-sectional reduction rate is 56%, the finished plating diameter is 3.0 dragons.
次いで、下記第１表に示す断面減少率で第１回目の伸線
加工及びその後の伸線加工を行って線径が２■■の各実
施例及び比較例の耐食めっき鋼線を得た。なお、比較例
３は従来の２層の合金層を有する耐食めっき鋼線である
。Next, a first wire drawing process and a subsequent wire drawing process were performed at the cross-sectional reduction rates shown in Table 1 below to obtain corrosion-resistant plated steel wires of each Example and Comparative Example having a wire diameter of 2■■. Note that Comparative Example 3 is a conventional corrosion-resistant plated steel wire having two alloy layers.
この実施例及び比較例の各耐食めっき鋼線について表面
平滑性を調査した。また、捻回試験を行って強度も求め
た。これらの結果を併せて第１表に示した。The surface smoothness of each of the corrosion-resistant plated steel wires of this example and comparative example was investigated. In addition, a twisting test was conducted to determine the strength. These results are shown in Table 1.
但し、表面平滑性は目視により各耐食めっき鋼線の平滑
状況を調べ、平滑な場合をｏ１凹凸が著しい場合をＸで
示した。また、捻回試験は各耐食めっき鋼線を２００鰭
のスパンで１方向に捻回し、線材が破断するまでの捻回
回数を調べた。この試験を各実施例及び比較例について
５回ずつ行い、破断するまでの平均捻回回数を算出した
。更に、各実施例及び比較例について、この捻回回数の
最大値及び最小値との差を求めた。However, regarding the surface smoothness, the smoothness of each corrosion-resistant plated steel wire was visually inspected, and smooth cases were indicated by o1, and cases with significant unevenness were indicated by X. In addition, in the twisting test, each corrosion-resistant plated steel wire was twisted in one direction with a span of 200 fins, and the number of twists until the wire broke was determined. This test was conducted five times for each example and comparative example, and the average number of twists until breakage was calculated. Furthermore, for each example and comparative example, the difference between the maximum value and the minimum value of the number of twists was determined.
この第１表から明らかなように、第１回目の伸線加工時
の断面減少率が！５％と大きい比較例１及び全断面減少
率が５６％と大きい比較例２は断線までの平均捻回回数
が３４回以下と少なく、強度のバラツキも大きいもので
あった。また、めっき後に伸線加工を行わない比較例３
は表面平滑性が極めて悪いものであった。一方、本発明
の実施例１乃至３はいずれも表面平滑性が優れており、
断線までの平均捻回回数も３６回以上と多く、また、機
械的強度の均一性も優れている。As is clear from Table 1, the cross-section reduction rate during the first wire drawing process is! In Comparative Example 1, which had a large reduction rate of 5%, and Comparative Example 2, which had a large total cross-sectional reduction rate of 56%, the average number of twists until wire breakage was as small as 34 times or less, and the strength varied widely. Comparative example 3 in which wire drawing is not performed after plating
The surface smoothness was extremely poor. On the other hand, Examples 1 to 3 of the present invention all have excellent surface smoothness,
The average number of twists before breaking is 36 or more, and the uniformity of mechanical strength is also excellent.
［発明の効果］
以上説明したように本発明によれば、溶融亜鉛めっき及
び溶融アルミニウムー亜鉛めっき後、断面減少率がｌθ
％以下で第１回目の伸線加工を行い、続いて伸線加工し
て全断面減少率を５０％以下として耐食めっき鋼線を製
造するから、周面に凹凸がなく、機械的強度が優れた耐
食めっき鋼線を得ることができる。[Effects of the Invention] As explained above, according to the present invention, after hot-dip galvanizing and hot-dip aluminum-zinc plating, the area reduction rate is lθ
% or less, and then the wire is drawn to produce a corrosion-resistant plated steel wire with a total cross-sectional reduction rate of 50% or less, so there are no irregularities on the circumferential surface and it has excellent mechanical strength. Corrosion-resistant plated steel wire can be obtained.
Claims (1)
アルミニウム−亜鉛合金めっきを施す工程と、複数回の
伸線加工を行う工程とを有し、前記複数回の伸線加工の
最初の回の伸線加工における断面減少率が１０％以下で
あり、最終回の伸線加工終了後の全断面減少率が５０％
以下であることを特徴とする耐食めっき鋼線の製造方法
。(1) The process includes a process of applying hot-dip galvanizing to the circumferential surface of the steel wire, a process of applying hot-dip aluminum-zinc alloy plating, and a process of performing wire drawing multiple times, and the process of performing wire drawing multiple times. The cross-sectional reduction rate in the first wire drawing process is 10% or less, and the total cross-sectional reduction rate after the final wire drawing process is 50%.
A method for producing a corrosion-resistant plated steel wire, characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11706389A JPH02295626A (en) | 1989-05-10 | 1989-05-10 | Production of corrosion resistant plated steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11706389A JPH02295626A (en) | 1989-05-10 | 1989-05-10 | Production of corrosion resistant plated steel wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02295626A true JPH02295626A (en) | 1990-12-06 |
Family
ID=14702508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11706389A Pending JPH02295626A (en) | 1989-05-10 | 1989-05-10 | Production of corrosion resistant plated steel wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02295626A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07109556A (en) * | 1993-10-08 | 1995-04-25 | Shinko Kosen Kogyo Kk | Alloy layer coated steel wire and its production |
-
1989
- 1989-05-10 JP JP11706389A patent/JPH02295626A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07109556A (en) * | 1993-10-08 | 1995-04-25 | Shinko Kosen Kogyo Kk | Alloy layer coated steel wire and its production |
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