JP3399895B2 - Hot-dip galvanized steel wire having high corrosion resistance and method for producing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a galvanized steel wire such as a wire net, a car mat for revetment work, a fish net, etc., which is exposed to the outdoors and has a high corrosion resistance.

[0002]

2. Description of the Related Art As a galvanized steel wire, a galvanized steel wire or a zinc-aluminum alloy-plated steel wire having better corrosion resistance than that is used. This zinc-aluminum alloy-plated steel wire is generally cleaned by cleaning and degreasing the steel wire, then fluxed, and then hot-dipped mainly with zinc as the first step and then the second step. As a step, hot dip plating is performed in a Zn-Al alloy bath containing 10% Al added, or Zn-A containing 10% Al added directly.
Plating with an alloy bath and pulling vertically from the plating bath,
It is made by winding after cooling.

Regarding this zinc-aluminum alloy-plated steel wire, there is a method of increasing the plating thickness in order to further improve the corrosion resistance. In order to secure the plating thickness, there is a method of increasing the moving speed (wire speed) of the steel wire and pulling it up from the plating bath at a high speed to increase the amount of the plating alloy adhered to the wire due to the viscosity of the molten plating alloy. However, due to the increase in speed, non-uniformity of the plating thickness is likely to occur in the cross section perpendicular to the longitudinal direction of the plated steel wire, which causes a limitation in production equipment.

Therefore, galvanization by the current manufacturing equipment and hot dip coating by Zn-Al alloy cannot be said to have sufficient corrosion resistance, and in the present day, there is a strong demand for a long life of the plated steel wire, so that the demand cannot be completely satisfied. There was a problem. A Zn-Al-Mg alloy-based plating composition having high corrosion resistance in which Mg is added to the plating bath is proposed in Japanese Patent Laid-Open No. 10-226865, but this method is premised on thin weighting for steel plates, which is a car mat. When applied to the thick-plated steel wire represented by No. 1, there is a problem that cracks occur during processing of the steel wire after plating. Further, Japanese Patent Application Laid-Open No. 7-207421 describes a method of thickening Zn-Al-Mg alloy plating. However, if this method is applied as it is, the Fe-Zn alloy layer becomes thick and the alloy layer is formed during the processing of the steel wire. There was a problem of cracking and peeling.

Further, in the conventional plated steel wire, when minute irregularities are generated on the surface, the surface area increases and the corrosion resistance decreases. Therefore, the surface roughness has been made as small as possible. It has been said that when this plated wire is used for revetment work, etc., it is slippery and there is a safety problem when a person rides on the plated steel wire after the construction.

[0006]

The present invention has been made to solve the above problems, and an object of the present invention is to provide a hot-dip galvanized steel wire having high corrosion resistance and excellent friction characteristics, and a method for producing the same. And

[0007]

The gist of the present invention is as follows. (1) On the surface of the steel wire, the average composition is Al: 4 to 20 in weight%
%, Mg: 0.8-5%, balance Zn
In the case of plated steel wire having
The maximum value of roughness Rmax is 60 to 300 μm, and
Fe-Zn alloy layer of 20 μm or less is provided
Which has high corrosion resistance and excellent workability.
KI steel wire .

(2) The plated steel wire having high corrosion resistance and excellent workability according to the above (1), characterized in that the plating alloy contains Si: 2% or less by weight. (3) The plating alloy is in a weight% and further contains sodium:
A plated steel wire having a high corrosion resistance and excellent workability according to the above (1) or (2), which contains 0.001 to 0.1%.

(4) The plating alloy according to any one of the above (1) to (3), characterized in that the plating alloy contains Ti: 0.01 to 0.1% by weight. Plated steel wire with corrosion resistance and excellent workability. (5) In the plated steel wire, the Fe-Zn alloy layer existing at the plating-base iron interface contains Al : 4% or more and Mg : 1% or more, (1) to (4). A plated steel wire having high corrosion resistance and excellent workability according to any one of 1.

(6) In a plated steel wire, an α phase containing Al—Zn as a main component and a Zn single phase or Mg in the plating layer outside the Fe—Zn-based alloy layer present at the interface of the plated base iron.
-Zn alloy phase β phase and Zn / Al / Zn-M
g A plated steel wire having high corrosion resistance and excellent workability according to any one of the above items (1) to (5), wherein each of the ternary eutectic phases is present.

(7) In the plated steel wire, the α phase containing Al—Zn as a main component and the Zn single phase or Mg in the plating phase outside the Fe—Zn-based alloy layer existing at the interface of the plated base iron.
-Zn alloy phase β phase and Zn / Al / Zn-M
g ternary eutectic phase exists, and the β phase has a volume ratio of 20
% Or less, a plated steel wire having high corrosion resistance and excellent workability according to any one of the above items (1) to (6).

(8) In the plated steel wire, the plating layer outside the Fe--Zn-based alloy layer present at the interface of the plated base metal has a dendrite structure, which is the above (1) to (1).
A plated steel wire according to any one of (5), which has high corrosion resistance and excellent workability. (9) When a plated steel wire is manufactured, hot-dip plating mainly containing zinc is applied as the first step, and then the second zinc-alloy alloy having the average composition of any one of the above (1) to (4) is applied as the second step. The method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of (1) to (8) above, which has the plating composition according to the above item.

(10) When manufacturing a plated steel wire,
As a stage, hot dip galvanizing containing Al: 3% or less and Mg: 0.5% or less by weight is applied, and then as a second stage, the average composition of the molten zinc alloy is any one of the above (1) to (4). The method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of (1) to (8) above, which has the plating composition according to the above item.

(11) In a process for producing a plated steel wire in which hot-dip plating mainly containing zinc is performed as the first step and then hot-dip zinc alloy plating is performed as the second step, the portion where the plated steel wire is pulled up from the plating alloy is nitrogen gas. The method for producing a plated steel wire having high corrosion resistance and excellent workability according to the above (9) or (10), characterized in that the surface of the bath and the plated steel wire are prevented from being oxidized.

(12) As a first step, hot dip mainly consisting of zinc is applied with a plating bath immersion time of 20 seconds or less, and then as a second step, hot dip zinc alloy plating is applied with a plating bath immersion time of 2 seconds.
The above (9) to (11), which is performed in 0 second or less.
A method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of 1. (13) In the process for producing a plated steel wire in which hot-dip plating mainly containing zinc is performed as the first step and then hot-dip zinc alloy plating is performed as the second step, water spray or vapor is applied immediately after pulling the plated steel wire from the plating alloy. A method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of the above items (9) to (12), characterized in that the plating alloy is solidified by direct water cooling with water spray or water flow. .

(14) In a process for producing a plated steel wire in which hot-dip plating mainly containing zinc is performed as the first step and then hot-dip zinc alloy plating is performed as the second step, a cooling start temperature is set when cooling the plated steel wire. From melting point of plating alloy to melting point +
The method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of the above items (9) to (13), characterized in that the temperature is 20 ° C.

(15) The steel composition of the plated steel wire is wt%.
In, C: 0.02~0.25%, Si: 1% or less, M
n: 0.6% or less, P: 0.04% or less , S: 0.04
% Or less, the method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of the above items (9) to (14) . (16) The steel component of the plated steel wire is wt% and C: 0.0
2 to 0.25%, Si: 1% or less, Mn: 0.6% or less
Below, P: 0.04% or less, S: 0.04% or less
15. The method according to any one of claims 9 to 14, characterized in that
A method for producing plated steel wire with high corrosion resistance and excellent workability. (17) The method according to any one of (1) to (8) above.
Wire mesh and cage mat made of Kuki steel wire with high slip resistance
To.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
In the present invention, the average composition of the plating alloy is wt% Al:
4 to 20%, Mg: 0.8% to 5%, and the balance Zn. Al has the effect of enhancing corrosion resistance, and if it is less than 4%, it has no effect, and if it is present in the plating bath, the effect of preventing Mg oxidation cannot be obtained. Further, if Al is added in an amount of more than 20%, the plated alloy formed becomes hard and brittle, so that processing cannot be performed. Therefore, the range of Al in the plating alloy is 4 to 2
0% In the case of steel wire plating, since thickening is performed,
A stable plating layer can be obtained by setting it to preferably 9 to 14%.

Mg uniformly produces a corrosion product of plating, and if the corrosion product contains Mg, it prevents the progress of corrosion.
It has the effect of improving corrosion resistance. If the added amount of Mg is less than 0.8%, the effect of improving corrosion resistance cannot be obtained. If it exceeds 5%, oxides are easily generated on the surface of the plating bath and a large amount of dross is generated, which makes operation difficult. Figure 1 shows Zn-10%
It shows the relationship between the amount of Mg added when Mg is added to the Al alloy and the index of the amount of dross generated on the surface of the plating bath. Conditions other than the amount of Mg are the same. Mg amount is 5%
If it exceeds the range, the amount of dross generated increases, the frequency of dross removal increases, and operation becomes difficult. In order to achieve both the corrosion resistance and the amount of dross generated, Mg is 0.8% to 5%. An alloy layer mainly composed of Fe-Zn is formed at the plating-base iron interface, but when the alloy layer is thick, the alloy layer is easily cracked or the alloy layer-base iron interface or the alloy layer-plating interface is easily cracked. Become. FIG. 2 shows the relationship between the alloy layer thickness in the case of Zn-10% Al-1% Mg alloy plating and the number of cracks in the winding process. If the thickness of the plating alloy layer exceeds 20 μm, the number of cracks increases and the plating cannot be practically used.
Since the upper limit that does not impair workability is 20 μm, Fe−
The thickness of the Zn alloy layer is 20 μm or less.

It is also effective to add Si to the plated layer in order to further improve the corrosion resistance. It is more effective to add Si when the amount of Al added is large. In the case where the maximum amount of Al added in the present invention is 20%, the maximum amount that the effect of Si can be obtained is 2%, so the range of Si is set to 2%. Further, dross is generated on the surface of the plating bath during plating, but addition of a trace amount of Na is effective for suppressing dross generation. By suppressing the generation of dross, the plating surface can be improved and the yield of plating alloy can be improved. When Na exceeds 0.1%, oxidation of Na occurs, so the range of Na was made 0.001 to 0.1%. Further, addition of Ti is effective for suppressing the formation of dross, and its effective range is 0.0
It is 1 to 0.1%.

In addition to the above Si, Na and Ti, the addition of antimony, misch metal or the like can improve the surface quality of the plating. In the plated steel wire described so far, the corrosion resistance is improved by including Al: 4% or more and Mg: 1% or more in the Fe-Zn alloy layer existing at the plating-base iron interface. If the Al content in the alloy layer is 4% or more, the effect of improving the corrosion resistance cannot be obtained.
% Or more. In addition, addition of Mg produces uniform corrosion products, but if less than 1%, no effect is obtained.
Is 1% or more.

In the plated steel wire of the present invention, Al, M
Since g is a component, cooling after plating causes Al-Z in the plating layer outside the alloy layer existing at the interface of the plating base iron.
An α phase containing n as a main component, a β phase consisting of a Zn single phase or a Mg—Zn alloy phase, and a Zn / Al / Zn—Mg ternary eutectic phase can coexist. Of these, Zn / Al / Zn
The presence of the —Mg ternary eutectic phase provides the uniform formation of corrosion products and the effect of preventing the progress of corrosion by the corrosion products. Further, the β phase is inferior in corrosion resistance to the other phases, so that it is likely to cause local corrosion. The volume ratio is 20%
If it exceeds, the corrosion resistance will be reduced, so the volume ratio is 20
% Or more.

When the steel wire after plating is subjected to strong cooling by water cooling, the plating layer outside the alloy layer mainly composed of Fe--Zn existing at the interface of the plated base metal can have a dendrite structure. When a dendrite structure is used, each structure generated during plating becomes finer and corrosion resistance is improved. As a method for obtaining the plated steel wire of the present invention, there is a two-step plating method.
As the first step, hot dip galvanized mainly Fe-
By forming a Zn alloy layer and then setting the average composition of the molten zinc alloy as the second step within the range of the present invention, the plated steel wire described above can be efficiently obtained. The first-stage molten zinc alloy has a weight percentage of Al: 3% or less and Mg: 0.5.
% Or less can be included. Fe-Zn in the first step
When obtaining an alloy layer, if Al and Mg are included, A in the alloy layer
It has an effect of easily admitting 1 and Mg.

To produce the plated steel wire of the present invention, the portion pulled up from the plating alloy is purged with nitrogen gas,
Workability can be improved by preventing oxidation of the bath surface and the plated steel wire. If oxides are generated on the plating surface immediately after plating or if the oxides are generated on the bath surface,
During processing, the oxide may serve as a nucleus to crack the plating.
Therefore, it is important to prevent oxidation of the takeout part. FIG. 3 is a comparison of surface cracks in a winding test of a plated steel wire having a plating alloy composition of Zn-10% Al-3Mg with or without breakage. If the air is not cut off, cracks will occur on the surface beyond the allowable limit. In addition to nitrogen, an inert gas such as argon or helium can be used for preventing oxidation, but nitrogen is the best in terms of cost.

When the plated wire of the present invention is obtained by two-step plating, in order to properly grow the plating alloy, hot-dip plating mainly containing zinc is applied as the first step for 20 seconds or less for immersion in the plating bath. Next, as a second step, it is necessary to perform hot dip zinc alloy plating with a plating bath immersion time of 20 seconds or less.
If plating is performed for a longer time than this, the thickness of the alloy layer becomes thicker and exceeds 20 microns. Therefore, as the first step, hot dip plating mainly consisting of zinc is applied for 20 seconds or less in the plating bath, and then the second step. As a step, hot dip zinc alloy plating is performed with a plating bath immersion time of 20 seconds or less. FIG. 4 shows the bath composition Zn-on a Zn-plated wire having a Fe-Zn alloy layer thickness of 15 μm formed by the first-stage Zn plating (immersion time 20 seconds).
It shows the relationship between the immersion time of the plating bath and the thickness of the Fe-Zn alloy layer when plating with 10% Al-1% Mg. In the second-stage alloy plating, if the thickness of the alloy layer is 20 seconds or less in the plating alloy bath immersion, the growth is small and the alloy layer thickness is 20 μm or less.

When the plating alloy of the plated steel wire after plating is rapidly cooled from the molten state, each phase is solidified without growing, so that the plating structure can be made fine. By further strengthening the cooling, dendrites are formed as the solidified structure of the plated alloy. As the method, immediately after the plated steel wire is pulled up from the plated alloy, the plated alloy is solidified by water spray or steam spray or direct water cooling with a water flow.

When cooling the plated steel wire, it is necessary to start the cooling while the plating is in a molten state. When solidified by air cooling or the like, each phase grows during solidification to form a coarse structure. Therefore, the cooling start temperature needs to be equal to or higher than the melting point of the plating alloy. Further, when cooling water hits the high-temperature hot-dip coating having a low viscosity, the plating surface becomes rough, so the upper limit is made the melting point + 20 ° C.

As a steel component of the plated steel wire, weight%
In, C: 0.02~0.25%, Si: 1% or less, M
n: 0.6% or less, P: 0.04% or less , S: 0.04
% Or less. C is an element that determines the strength of steel, and is required to be 0.02% or more in order to realize the strength of ordinary plated steel wire. In addition, the 0.25% too high ultra-El and strength, because it can not be bent by human force at the time of construction at the time of use, such as the car mat, to 0.25% or less. Si has the effect of improving the plating adhesion and at the same time the effect of increasing the strength. Since Si is excessively strength when there super strong point rises to 1%, and 1% the upper limit. Mn has the effect of increasing the toughness of the steel and at the same time increasing the strength. Since Mn is too high, the strength when the 0.6% present ultra forte, the upper limit is 0.6%. P,
S causes embrittlement of the steel, so the upper limit is made 0.04%.

In the case of the conventional plated steel wire, if the surface is rough, the substantial surface area becomes large and the amount of corrosion increases. Therefore, the circumference line corresponding to the original surface is extracted from the roughness profile obtained by measuring the unevenness on the entire circumference of the plated wire based on DIN4768: 05.90, and the maximum roughness (Rmax) from the circumference line is measured. As a result of examination
It was confirmed that if the ax is 300 μm or less, the plated steel wire of the present invention does not affect the corrosion resistance. Also, Rma
It was found that when x is 60 μm or more, sufficient friction can be obtained. In addition, this plating composition and manufacturing method,
Even when applied to other steel products such as plate and shaped steel, high corrosion resistance can be obtained similarly.

[0030]

Example A steel wire rod of JIS G 3505 SWRM6 having a surface of 4 mm in diameter, which was plated with pure Zn, was plated with Zn-Al-Mg-based zinc alloy under the conditions shown in Table 1 and evaluated. For comparison, those having different plating compositions, Fe-Zn alloy layer structures and plating structures were similarly evaluated.

The plating structure was observed by EPMA after polishing the C section of the plated wire. The composition of the alloy layer was quantitatively analyzed with a beam diameter of 2 μm. Corrosion resistance is 250
The amount by which the plating was corroded per unit area was determined as the corrosion weight loss from the weight difference before and after the test by continuous salt water spraying for an hour. In this test, 20 g / m ² or less was passed and the pass / fail was determined.

For the workability evaluation, the prepared plated wire is 6 mm.
The steel wire having a diameter was wound 6 times, and the presence or absence of cracks was determined by visual observation of the surface. Further, after the cellophane tape was attached to the sample after the judgment of cracking, the presence or absence of peeling of the plating was observed when peeling off, and one or less cracks and no peeling were taken as a condition for passing. Table 1 shows the relationship between the plating composition, the alloy layer composition, the thickness plating structure and the β phase volume ratio, the corrosion resistance, the workability, and the dross formation in the plating bath. All of the examples of the present invention showed good corrosion resistance and workability, and produced little dross. In Comparative Examples 1 to 5, the plating alloy composition is outside the scope of the present invention. In Comparative Examples 1 and 2, the amount of Al or Mg alloy is lower than the lower limit and the corrosion resistance is poor. In Comparative Example 3-5, the amount of Al or Mg alloy was higher than the upper limit and the workability was poor, and dross was generated in the plating bath, which hindered the operation. Comparative example 6,
No. 7 was a case where the thickness of the plating alloy layer was out of the range of the present invention, resulting in poor workability. Comparative examples 8 to 10 are
The β phase in the plated structure is out of the range of the present invention, and the corrosion resistance is poor.

Table 2 shows the relationship between the cooling method of the plating, the cooling start temperature and the corrosion resistance and workability of Zn-10% Al-3% M.
It shows about g. Those within the scope of the present invention show good results. FIG. 5 shows the relationship between surface roughness and friction. The friction coefficient measures the dynamic friction coefficient when the plated wire is fixed in a straight line and the bottom of the safety shoe is moved along the line. Slip resistance is sufficient when the friction coefficient is 1.4 times or more as compared with the conventional one having a smooth surface.

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

As described above, when the plating apparatus according to the present invention is used, a zinc alloy plated steel wire having high corrosion resistance and excellent workability can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between a Mg content and a dross generation index.

FIG. 2 is a diagram showing the relationship between the thickness of a plating alloy and the number of cracks in a winding test.

FIG. 3 is a diagram showing the relationship between the presence or absence of air breakage and the number of cracks in a winding test.

FIG. 4 is a diagram showing the relationship between the second-stage plating alloy immersion time and the Fe—Zn alloy layer thickness.

FIG. 5 is a diagram showing the relationship between the maximum surface roughness and the coefficient of friction.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification symbol FI E02B 3/08 301 E02B 3/08 301 E02D 17/20 103 E02D 17/20 103A 103G (72) Inventor Akira Takahashi Kimitsu City, Chiba Prefecture Kimitsu No. 1 Nippon Steel Co., Ltd. Kimitsu Steel Co., Ltd. (72) Inventor Atsuhiko Yoshie 20-1 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Co., Ltd. Technical Development Division (56) Reference Japanese Patent Laid-Open No. 7- 207421 (JP, A) JP 5-51715 (JP, A) JP 11-158656 (JP, A) JP 2000-178774 (JP, A) JP 10-265931 (JP, A) Publication No. 63-50419 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) C23C 2/00-2/40

Claims (17)

(57) [Claims] 1. A steel wire surface having an average composition of wt% Al: 4.
In a plated steel wire having a plating alloy consisting of ˜20%, Mg: 0.8 to 5%, and the balance Zn, the maximum roughness Rmax in the circumferential direction of the plating surface is 60 to 300 μm,
A plated steel wire having high corrosion resistance and excellent workability, which has an Fe-Zn alloy layer of 20 μm or less at the plating-base iron interface. 2. The plating alloy, in wt%, further comprises S
The plated steel wire having high corrosion resistance and excellent workability according to claim 1, wherein i: 2% or less is contained. 3. The plating having high corrosion resistance and excellent workability according to claim 1 or 2, wherein the plating alloy contains 0.001 to 0.1% by weight of sodium. Steel wire. 4. The plating alloy, in wt%, further comprises T
i: 0.01 to 0.1% is contained, The plated steel wire having high corrosion resistance and excellent workability according to any one of claims 1 to 3. 5. In a plated steel wire, 4% or more of Al and 4% or more of Mg in the Fe—Zn alloy layer existing at the plating-base iron interface.
1% or more is contained, The plated steel wire which has the high corrosion resistance of any one of Claims 1-4, and was excellent in workability. 6. In a plated steel wire, an α phase containing Al—Zn as a main component and a Zn single phase or Mg—Z in a plating layer outside an Fe—Zn-based alloy layer existing at an interface of a plated base metal.
The β phase consisting of an n alloy phase and the Zn / Al / Zn-Mg ternary eutectic phase are present respectively.
~ A plated steel wire having high corrosion resistance according to any one of claims 5 to 6 and excellent workability. 7. In a plated steel wire, an α phase containing Al—Zn as a main component and a Zn single phase or Mg—Z in the plating phase outside the Fe—Zn-based alloy layer present at the interface of the plated base iron.
7. A β phase composed of an n alloy phase and a Zn / Al / Zn—Mg ternary eutectic phase are present, and the β phase has a volume ratio of 20% or less. A plated steel wire having high corrosion resistance and excellent workability according to any one of items. 8. The plated steel wire according to claim 1, wherein the plated layer outside the Fe—Zn-based alloy layer present at the plated base iron interface has a dendrite structure. A plated steel wire having high corrosion resistance and excellent workability as described in the item. 9. When producing a galvanized steel wire, hot-dip galvanizing mainly zinc is applied as a first step, and then an average composition of the hot-dip zinc alloy as a second step is any one of claims 1 to 4. The method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of claims 1 to 8, wherein the plating composition has the plating composition according to item 1). 10. When manufacturing a galvanized steel wire, the first stage is hot dip galvanizing containing Al: 3% or less and Mg: 0.5% or less by weight, and then the second stage is a molten zinc alloy. The average composition is the plating composition according to any one of claims 1 to 4, and the high corrosion resistance and workability according to any one of claims 1 to 8 are provided. Excellent manufacturing method for plated steel wire. 11. In a process for producing a plated steel wire in which hot-dip galvanizing mainly zinc is applied as a first step and then hot-dip zinc alloy plating is performed as a second step, a portion for pulling up the plated steel wire from the plating alloy is filled with nitrogen gas. The method for producing a plated steel wire having high corrosion resistance and excellent workability according to claim 9 or 10, wherein purging is performed to prevent oxidation of the bath surface and the plated steel wire. 12. Hot-dip galvanizing mainly zinc as a first step with a plating bath immersion time of 20 seconds or less, and then a second step.
A plated steel wire having high corrosion resistance and excellent workability according to any one of claims 9 to 11, characterized in that hot-dip zinc alloy plating is performed as a step for 20 seconds or less in a plating bath immersion time. Method. 13. A process for producing a plated steel wire, wherein a first step is hot dip galvanizing, and a second step is hot dip galvanizing, and a water spray is applied immediately after pulling the galvanized steel wire out of the plating alloy. Alternatively, the plating alloy is solidified by direct water cooling with steam spray or water flow, and the plated steel wire having high corrosion resistance and excellent workability according to any one of claims 9 to 12. Method. 14. In a plated steel wire manufacturing process in which hot-dip plating mainly containing zinc is carried out as a first step and then hot-dip zinc alloy plating is carried out as a second step, a cooling start temperature is plated when the plated steel wire is cooled. From melting point of alloy to melting point +20
The method for producing a plated steel wire having high corrosion resistance and excellent workability according to any one of claims 9 to 13, characterized in that the temperature is set to be ° C. 15. The steel composition of the plated steel wire is% By weight,
C: 0.02-0.25%, Si: 1% or less, Mn:
0.6% or less, P: 0.04%Less than, S: 0.04% or less
Characterized by being belowClaims 1-8Any of
It has high corrosion resistance and excellent workability.Plated steel wire. 16. The steel composition of the plated steel wire is wt%,
C: 0.02-0.25%, Si: 1% or less, Mn:
0.6% or less, P: 0.04% or less, S: 0.04% or less
It is below, It is any one of Claims 9-14 characterized by the above-mentioned.
Made of plated steel wire with high corrosion resistance and excellent workability
Build method. 17. The method according to any one of claims 1 to 8.
Wire mesh and cage made of plated steel wire with high slip resistance
And