JPH04154950A - Production of fe-zn alloy coated steel sheet - Google Patents
Production of fe-zn alloy coated steel sheetInfo
- Publication number
- JPH04154950A JPH04154950A JP27709290A JP27709290A JPH04154950A JP H04154950 A JPH04154950 A JP H04154950A JP 27709290 A JP27709290 A JP 27709290A JP 27709290 A JP27709290 A JP 27709290A JP H04154950 A JPH04154950 A JP H04154950A
- Authority
- JP
- Japan
- Prior art keywords
- bath
- plating
- steel sheet
- hot
- added
- 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 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 229910001297 Zn alloy Inorganic materials 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000007747 plating Methods 0.000 claims abstract description 30
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 7
- 229910052745 lead Inorganic materials 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 229910052718 tin Inorganic materials 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 6
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 5
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005246 galvanizing Methods 0.000 abstract 4
- 230000003449 preventive effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 23
- 238000002844 melting Methods 0.000 description 16
- 230000008018 melting Effects 0.000 description 16
- 230000003647 oxidation Effects 0.000 description 15
- 238000007254 oxidation reaction Methods 0.000 description 15
- 229920006395 saturated elastomer Polymers 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 238000003466 welding Methods 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910017813 Cu—Cr Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000007716 flux method Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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、Ｆｅ−Ｚｎ合金め−）台鋼板の製造方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing a Fe--Zn alloy steel plate.
（従来の技術）
Ｆｅ−Ｚｎ合金めっき鋼板を製造する方法としては、例
えば、特開昭６４−２１０４９号の如＜Ｆｅを含むＺｎ
浴に浸漬して製造することが開示されている。(Prior art) As a method for producing a Fe-Zn alloy plated steel sheet, for example, as described in Japanese Patent Application Laid-open No. 64-21049,
Manufacturing by immersion in a bath is disclosed.
また、Ｆｅ−Ｚｎ合金めっき鋼板を製造するに際して、
添加する元素としては、例えば、特開平２−１３８４５
０号の如＜Ｆｅを含むＺｎ浴にＣｏ、Ｎｉ、Ｍｎ、Ｃｒ
。In addition, when manufacturing Fe-Zn alloy plated steel sheets,
Examples of elements to be added include JP-A-2-13845
As in No. 0, Co, Ni, Mn, Cr is added to the Zn bath containing Fe.
.
Ｓｉ、Ｔｉ、Ｃｄ、Ｍｇ、Ｐを添加してめっきすること
が開示されている。It is disclosed that plating is performed by adding Si, Ti, Cd, Mg, and P.
しかしながら、このような方法においても、未だ満足す
べき結果が得られ難く、めっき方法およびめフき特性、
つまり、耐蝕性、パウダリング性等の加工性、スポット
溶接性等の向上が強く要求されている。However, even with such methods, it is still difficult to obtain satisfactory results, and the plating method, plating characteristics,
In other words, there is a strong demand for improvement in corrosion resistance, workability such as powdering property, spot weldability, and the like.
（発明の目的）
本発明はこのような要求を有利に満足するためなされた
ものである。(Object of the Invention) The present invention has been made to advantageously satisfy these requirements.
（課題を解決するための手段）
本発明の特徴とするところは、溶融亜鉛めっき鋼板の製
造において、Ｆｅ：０．１〜１０％を含むＺｎ浴にＡｆ
ｆｉ、Ｐｂ、Ｓｎ、Ｓｂ、Ｍｇ、Ｓｔ、Ｃｕ、Ｂｔ、Ｔ
ｉ、Ｐのｔｍまたは２種以上の０．０１〜０．５０％を
添加して、浴温を６００〜９００℃でめっきし、耐蝕性
、パウダリング性等の加工性、スポット溶接性に優れる
、Ｆｅ−Ｚｎ合金めっき鋼板の製造方法である。(Means for Solving the Problems) The present invention is characterized by adding Af to a Zn bath containing 0.1 to 10% Fe in the production of hot-dip galvanized steel sheets.
fi, Pb, Sn, Sb, Mg, St, Cu, Bt, T
By adding 0.01 to 0.50% of i, P tm or two or more types, plating at a bath temperature of 600 to 900°C, it has excellent corrosion resistance, processability such as powdering property, and spot weldability. , a method for producing a Fe-Zn alloy plated steel sheet.
従来のＦｅ−Ｚｎ合金めっき鋼板の製造においては、Ｚ
ｎを主体とするめっき浴でめっきを施した後、加熱して
Ｆｅ −Ｚｎ合金としていたので、過合金、つまり、Ｆ
ｅの界面に脆いｒ相が生成して、加工時にめっき層が剥
離したり、表面にＺｎＯを主体とする酸化膜を生成させ
、スポット溶接性を向上させるとき、表面にＺｎＯが生
成しにくくなる等の不具合を生じていた。また、前記の
Ｆｅを含むＺｎ浴に浸漬して製造する方法でも、表面性
状のよい耐蝕性にすぐれ加工性、溶接性にすぐれたＦｅ
−Ｚｎ合金めフき鋼板とすることは困難であった。In the production of conventional Fe-Zn alloy plated steel sheets, Z
After plating with a plating bath mainly composed of n, it was heated to form a Fe-Zn alloy, so overalloying, that is, F
When a brittle r phase is generated at the interface of e and the plating layer is peeled off during processing, and an oxide film mainly composed of ZnO is generated on the surface to improve spot weldability, it becomes difficult to generate ZnO on the surface. This caused problems such as: In addition, the method of manufacturing by immersing in a Zn bath containing Fe can also be used to produce Fe, which has good surface properties, excellent corrosion resistance, and excellent workability and weldability.
- It was difficult to make a Zn alloy brushed steel sheet.
本発明者は種々研究した結果、Ｆｅ：０．１〜１０％を
含むＺｎ浴にＡ９．、Ｐｂ、Ｓｎ、Ｓｂ、Ｍｇ、Ｓｉ、
Ｃｕ、Ｂｉ。As a result of various studies, the present inventors found that A9. , Pb, Sn, Sb, Mg, Si,
Cu, Bi.
ＴＩ、Ｐの１種または２種以上の０．０１〜０．５０％
を添加して、浴表面の酸化を防止し、浴の粘度を低くし
、目付量の調整を容易にして、浴温な６００〜９００℃
にしてめっきすることによりＦｅ−Ｚｎ合金めっき鋼板
の溶接性、加工性、パウダリング性が向上するＦｅ−Ｚ
ｎ合金めっき鋼板の製造方法を見出した。0.01 to 0.50% of one or more of TI and P
is added to prevent oxidation of the bath surface, lower the viscosity of the bath, and make it easier to adjust the basis weight.
Fe-Z improves weldability, workability, and powdering properties of Fe-Zn alloy plated steel sheets by plating with
We have discovered a method for manufacturing n-alloy plated steel sheets.
Ｚｎ浴に含有するＦｅの濃度を０．１〜１０％としたの
は、Ｆｅ Ｏ，１％未満では浴温を高温にすることで、
Ｚｎの蒸気の発生が多くなるためであり、ＦｅｌＯ％を
超えると脆いｒ相が生成して、加工時に剥離したり、ス
ポット溶接性に有効なＺｎＯが生成しにくくなるためで
ある。The reason why the concentration of Fe contained in the Zn bath is set to 0.1 to 10% is that when FeO is less than 1%, the bath temperature is raised to a high temperature.
This is because more Zn vapor is generated, and if FeO% is exceeded, a brittle r-phase is generated, which may cause peeling during processing or make it difficult to generate ZnO, which is effective for spot weldability.
さらに、ＡＭ、Ｐｂ、Ｓｎ、Ｓｂ、Ｍｇ、Ｓｔ 、Ｃｕ
、Ｂｉ 、Ｔｉ、Ｐを添加するのは、いずれも、Ｚｎと
同等の低融点金属であるかＺｎと共存することにより、
融点を下げる金属であり、しかも、Ｚｎより高沸点の金
属であるために、Ｚｎ単独での融点よりも低くなり、低
温でのめっきが可能となるためである。また、Ｚｎの沸
点より、Ｐを除いて高沸点であるためにＺｎの蒸発を抑
制する効果があるためである。Furthermore, AM, Pb, Sn, Sb, Mg, St, Cu
, Bi, Ti, and P are all low melting point metals equivalent to Zn, or by coexisting with Zn,
This is because it is a metal that lowers the melting point and has a higher boiling point than Zn, so the melting point is lower than that of Zn alone, making it possible to perform plating at low temperatures. In addition, since the boiling point of all the elements other than P is higher than that of Zn, it has the effect of suppressing the evaporation of Zn.
また、Ａｎ等の添加により、高温での酸化が抑制でき、
浴表面の酸化によるめっき不能となる現象を抑制で診る
ことによる大気中でのめっきができる利点があり、経済
的にも、設備の建設費用、操業上のコスト的にも有効で
ある。In addition, by adding An, etc., oxidation at high temperatures can be suppressed,
It has the advantage of being able to perform plating in the atmosphere by suppressing the phenomenon that makes plating impossible due to oxidation of the bath surface, and is effective in terms of economy, facility construction costs, and operating costs.
つぎに、Ａｌ，Ｐｂ、Ｓｎ、Ｓｂ、Ｍｇ、Ｓｔ、Ｃｕ、
Ｂｉ、Ｔｉ、Ｐを１種または２種以上の添加量の範囲を
０．０１〜０．５０％とした理由を述べる。Next, Al, Pb, Sn, Sb, Mg, St, Cu,
The reason why the amount of one or more of Bi, Ti, and P added is set to 0.01 to 0.50% will be described.
Δｆｌ：ｏ、０１〜０．５０％として、その下限を０．
０１％としたのはＡｎを添加することによる低融点化と
ともに、浴表面の酸化によるめっき不能となる現象を抑
制でき、それ未満では効果がでないためであり、また、
八又を添加することによって、酸化を防止して、浴表面
に浮遊する、いわゆる、スカムな防止でき、それ未満で
は効果が発揮で艶ないためであり、その上限を０．５０
％としたのはそれを超えて添加しても、その効果が飽和
し、しかも、Ｆｅ−Ａｎの金属間化合物の固体となり浮
遊し、いわゆる、ドロスとして、鋼板に付着して、表面
の品質を損ない、ＺｎＯを主体とする酸化膜を生成せし
めることにより、亜鉛めっき鋼板の溶接性を改善するに
際して、ＺｎＯを主体とする酸化膜の生成を抑制する等
の不具合いを生じるためである。ところで、号を添加す
ることによってもたらされる効果として、Ｚｎの蒸発の
低減、Ｚｎの酸化防止によるスカムの防止、Ｚｎの酸化
防止およびＦｅ−ＡＮの固形物の生成による粘度上昇の
防止等がある。Ｚｎの蒸発の低減はＺｎの蒸気圧を高く
して防止することは可能であるが、連続ラインでの高圧
状態を設定する工業的負荷は大きく、簡易にＡＮを添加
することによって可能となることの意義は大きい。また
、Ｚｎの酸化を防止することによって、スカムを防止で
きるが、ＡｎはＺｎよりも酸化し易く、酸化したＡｕｚ
Ｏｓは結晶構造が緻密で酸化の進行を抑制して、ひいて
はＺｎの酸化によるスカムの防止に寄与していると考え
られる。さらに、Ａ交を添加することによりて、Ｆｅ−
Ｚｎ浴の融点が低下し、融点が低下することによって、
粘度が低下して目付の調整が容易になる利点がある。こ
のように、Ａｌの添加によって、Ｆｅ−Ｚｎ合金めつき
が可能とする。Δfl:o, 01 to 0.50%, and the lower limit is 0.
The reason why it is set at 01% is that the addition of An lowers the melting point and suppresses the phenomenon that plating becomes impossible due to oxidation of the bath surface, and that if it is less than that, there is no effect.
By adding Hachimata, it is possible to prevent oxidation and to prevent so-called scum floating on the bath surface, and if it is less than that, the effect will not be achieved and the shine will not be achieved, so the upper limit is 0.50.
%, even if it is added in excess, the effect will be saturated, and moreover, the Fe-An intermetallic compound will become a solid and float, adhering to the steel plate as so-called dross, impairing the surface quality. This is because when improving the weldability of galvanized steel sheets, problems such as suppressing the formation of an oxide film mainly composed of ZnO occur when improving the weldability of galvanized steel sheets. By the way, the effects brought about by adding No. 3 include reduction of evaporation of Zn, prevention of scum by preventing oxidation of Zn, prevention of viscosity increase due to prevention of oxidation of Zn and generation of solid matter of Fe-AN, etc. It is possible to reduce the evaporation of Zn by increasing the vapor pressure of Zn, but the industrial burden of setting a high pressure state in a continuous line is large, so it is possible to reduce the evaporation of Zn by simply adding AN. is of great significance. In addition, scum can be prevented by preventing oxidation of Zn, but An is more easily oxidized than Zn, and oxidized Auz
It is thought that Os has a dense crystal structure and suppresses the progress of oxidation, thereby contributing to the prevention of scum caused by the oxidation of Zn. Furthermore, by adding A-
The melting point of the Zn bath decreases, and by decreasing the melting point,
It has the advantage of reducing viscosity and making it easier to adjust the basis weight. In this way, the addition of Al enables Fe-Zn alloy plating.
Ｐｂ ： ０．０１〜０．５０％として、その下限を０
．０１％としたのはそれ未満では融点の低下への寄与が
なくなり、また、Ｆｅ−Ｚｎのみの浴と同様にＦｅの酸
化物が生成するために溶接性は向上せず、ＺｎＯを主体
とする表面酸化物の生成への寄与が薄れスポット溶接性
が向上しないためであり、さらに、その上限なＯ，ＳＯ
％としたのはそれを超えて添加しても、その効果が飽和
し、添加しすぎることによって、かえって、表面の色調
を損なう等の欠陥を生じるためである。Pb: 0.01-0.50%, the lower limit is 0
．． The reason why we set it at 01% is that if it is less than that, it will not contribute to lowering the melting point, and like a Fe-Zn bath, Fe oxide will be generated, so the weldability will not improve, and the ZnO will be the main component. This is because the contribution to the formation of surface oxides fades and the spot weldability does not improve, and furthermore, the upper limit of O, SO
% because even if it is added in excess of this amount, the effect will be saturated, and if it is added too much, defects such as deterioration of the surface color tone will occur.
Ｓｎ ： ０．０１〜０．５０％として、その下限を０
．０１％としたのはそれ未満では融点の低下への寄与が
なくなるためであり、また、その上限を０．５０％。Sn: 0.01-0.50%, the lower limit is 0
．． The reason why it is set at 0.1% is that if it is less than that, it will not contribute to lowering the melting point, and the upper limit is set at 0.50%.
としたのはそれを超えて添加しても、その効果が飽和し
てしまうためである。This is because even if it is added in excess of this, the effect will be saturated.
Ｓｂ ： ０．０１〜０．５０％として、その下限を０
．０１％としたのはそれ未満では融点の低下への寄与が
なくなるためであり、また、その上限を０．５０％とし
たのはそれを超えて添加しても、その効果が飽和してし
まうためである。Sb: 0.01-0.50%, the lower limit is 0
．． The reason why it is set at 0.01% is that if it is less than that, it will not contribute to lowering the melting point, and the upper limit was set at 0.50% because even if it is added beyond that, the effect will be saturated. It's for a reason.
Ｍｇ：０．０１〜０．５０％として、その下限を０．０
１％としたのはそれ未満では融点の低下への寄与がなく
なり、Ｍｇの添加による粘度の低下に大きく寄与する効
果がでなくなるためであり、また、耐蝕性の向上への寄
与する効果がなくなるためであり、さらに、その上限を
０．５０％としたのはそれを超えて添加しても、それら
の効果が飽和してしまうためである。Mg: 0.01-0.50%, the lower limit is 0.0
The reason why it is set at 1% is because if it is less than that, it will no longer contribute to lowering the melting point, and the effect of adding Mg that greatly contributes to lowering viscosity will not be achieved, and the effect of contributing to improving corrosion resistance will also disappear. Furthermore, the reason why the upper limit is set to 0.50% is that even if added in excess of this, those effects will be saturated.
Ｓｔ ： ０．０１〜０．５０％として、その下限を０
．０１％としたのはそれ未満では融点の低下への寄与が
なくなり、Ｓｌの添加による粘度の低下に寄与する効果
がでなくなり、また、耐蝕性の向上への寄与する効果が
なくなるためであり、さらに、その上限を０．５０％と
したのはそれを超えて添加しても、その効果が飽和して
しまうためである。St: 0.01-0.50%, the lower limit is 0
．． The reason why it is set at 01% is because if it is less than that, it will not contribute to lowering the melting point, the effect of contributing to lowering the viscosity by adding Sl will not be achieved, and the effect of contributing to improving corrosion resistance will disappear. Furthermore, the reason why the upper limit is set to 0.50% is that even if it is added in excess of this, the effect will be saturated.
Ｃｕ ： ０．０１〜０．５０％として、その下限を０
．０１％としたのはそれ未満では融点の低下への寄与が
なくなるためであり、また、浴表面の酸化の防止効果が
なくなるためであり、さらに、その上限を０．５０％と
したのはそれを超えて添加しても、それらの効果が飽和
しでしまうためである。Cu: 0.01-0.50%, the lower limit is 0
．． The reason why we set the upper limit to 0.50% is because if it is less than 0.5%, it will not contribute to lowering the melting point and will not have the effect of preventing oxidation of the bath surface. This is because even if it is added in excess of this amount, the effects will be saturated.
Ｂｉ ： ０．０１〜０．５０％として、その下限を０
．０１％としたのはそれ未満では融点の低下への寄与が
なくなるためであり、また、その上限を０．５０％とし
たのはそれを超えて添加しても、その効果が飽和してし
まうためである。Bi: 0.01 to 0.50%, the lower limit is 0
．． The reason why it is set at 0.01% is that if it is less than that, it will not contribute to lowering the melting point, and the upper limit was set at 0.50% because even if it is added beyond that, the effect will be saturated. It's for a reason.
ＴＩ ： ０．０１〜０．５０％として、その下限を０
．０１％としたのはそれ未満では融点の低下への寄与が
なくなるためであり、また、耐蝕性の向上への寄与する
効果がなくなるためであり、さらに、その上限を０．５
０％としたのはそれを超えて添加しても、それらの効果
が飽和してしまうためである。TI: 0.01-0.50%, the lower limit is 0
．． The reason for setting the upper limit to 0.1% is that if it is less than 0.5%, there will be no contribution to lowering the melting point, and there will be no effect contributing to improving corrosion resistance.
The reason why it is set at 0% is because even if it is added in excess of this, the effects will be saturated.
Ｐ ： ０．０１〜０．５０％として、その下限を０．
０１％としたのはそれ未満では融点の低下への寄与がな
くなるためであり、また、耐蝕性の向上への寄与する効
果が薄くなるためであり、さらに、その上限を０．５０
％としたのはそれを超えて添加しても、それらの効果が
飽和してしまうためである。なお、Ｐの添加の下限の０
．０１％とじたが、耐蝕性の向上への寄与する効果の面
からの下限は０．００１％まで許容できる。P: 0.01 to 0.50%, and the lower limit is 0.01% to 0.50%.
The reason why the upper limit was set at 0.50% is because if it is less than that, there will be no contribution to lowering the melting point, and the effect of contributing to improving corrosion resistance will be weaker.
% because even if added in excess of this, the effects would be saturated. Note that the lower limit of P addition is 0
．． However, from the viewpoint of the effect contributing to improvement of corrosion resistance, the lower limit is allowable up to 0.001%.
つぎに、浴の温度を６００〜９００℃として、その下限
を６００℃としたのはＦｅ濃度によって変わるが、具体
的には、Ｆｅ濃度が１％以下では６００℃、２％で６５
０℃、３％で７００ ｔ、４％７３０℃、５％で７５０
℃、６％で７８０ ’ｅ、８％で７８０℃、１０％では
９００℃程度であり、溶融状態を確保するための温度で
あり、また、その上限を９００℃としたのはＡｌ等を添
加してＺｎの蒸気圧を上昇させ、ｚｎのヒユームの低減
ができたとしてもＺｎ単味での沸点が９０７〜９１１
ｔといわれているので、蒸発が激しくなるため、溶融状
態を確保できなくなるためである。もちろん、昇圧して
、例えば、２気圧で９８０ ’ｅになるＺｎの蒸気圧を
上昇させ、Ｚｎの蒸発を抑制して高温でめっきすること
は可能である。Next, the bath temperature was set at 600 to 900°C, and the lower limit was set at 600°C, which varies depending on the Fe concentration, but specifically, when the Fe concentration is 1% or less, it is 600°C, and when it is 2%, it is 65°C.
700 t at 0℃, 3%, 750 t at 4%, 730℃, 5%
℃, 780'e for 6%, 780°C for 8%, and about 900°C for 10%, which is the temperature to ensure a molten state, and the upper limit of 900°C is due to the addition of Al etc. Even if it were possible to increase the vapor pressure of Zn and reduce the fume of Zn, the boiling point of Zn alone would be 907 to 911.
This is because evaporation becomes intense and a molten state cannot be maintained. Of course, it is possible to increase the pressure to, for example, increase the vapor pressure of Zn to 980'e at 2 atmospheres, suppress the evaporation of Zn, and perform plating at a high temperature.
めっき後の冷却速度はとくに限定するものではないが、
地鉄との界面に生成する加工性を劣化させるｒ相を抑制
するために、３０ｔｌ：／ｓｅｃ以上の高速であること
が望ましい。The cooling rate after plating is not particularly limited, but
A high speed of 30 tl:/sec or higher is desirable in order to suppress the r-phase that is generated at the interface with the base metal and degrades workability.
めっきの方法はとくに限定するものではないが、例えば
、鋼板を還元処理後めっき浴中に浸漬するゼンジマータ
イプ、フラックス法、また、鋼材に下地めっきを施した
後、前処理加熱なしでめっきしてもよい。さらに、ロー
ルコータ−１電磁ポンプ法、メニスカスめっき等の片面
めっき等もできる。The plating method is not particularly limited, but examples include the Sendzimer type in which the steel plate is immersed in a plating bath after reduction treatment, the flux method, and the plating method in which the steel plate is plated with a base and then plated without pretreatment heating. You can. Furthermore, single-sided plating such as the roll coater 1 electromagnetic pump method and meniscus plating can also be performed.
このように、Ｆａ：０．１〜１０％を含むＺｎ浴にＡＭ
、Ｐｂ、Ｓｎ、Ｓｂ、Ｍｇ、Ｓｉ、Ｃｕ、Ｂｉ、Ｔｉ
、Ｐの１種または２種以上の０．０１〜０．５０％を添
加して、浴表面の酸化を防止し、浴の粘度を低くし、目
付量の調整を容易にして、浴温を６００〜９００℃にし
てめっきすることによりＦｅ −Ｚｎ合金めつぎ鋼板の
溶接性、加工性、パウダリング性が向上するＦｅ−Ｚｎ
合金めっき鋼板とすることができる。In this way, AM
, Pb, Sn, Sb, Mg, Si, Cu, Bi, Ti
By adding 0.01 to 0.50% of one or two or more of Fe-Zn improves weldability, workability, and powdering properties of Fe-Zn alloy mating steel sheets by plating at 600 to 900°C
It can be an alloy plated steel plate.
第１図はＦｅ：６％のＺｎ浴に八ｎの添加量を変えてめ
っきしたときの浴表面の酸化の程度を表面酸化物、つま
り、スカムの酸素濃度をＺｎとの比で表した図である。Figure 1 shows the degree of oxidation on the surface of the bath when plating was performed with varying amounts of 8n added to a Fe:6% Zn bath, expressed as a ratio of the oxygen concentration of the surface oxide, that is, the scum, to the Zn. It is.
第２図はＦｅ：６％のＺｎ浴にＡｌの添加量を変えてめ
っきしたときの浴の粘度の関係を表した図である。この
ように、Ｆｅ −Ｚｎ浴にＡｎを添加することにより、
さらに、ｐｂ等の上記添加元素を添加することにより、
浴表面の酸化がなくなり、粘度の低下による目付の制御
が容易になり、表面性状のよい合金めっきが製造できる
。FIG. 2 is a diagram showing the relationship between bath viscosity when plating is carried out by changing the amount of Al added to a Fe:6% Zn bath. In this way, by adding An to the Fe-Zn bath,
Furthermore, by adding the above additive elements such as pb,
Oxidation of the bath surface is eliminated, the basis weight can be easily controlled by lowering the viscosity, and alloy plating with good surface quality can be produced.
しかして、Ｆｅ：６％のＺｎ浴にＡｎ等の低融点金属を
添加することによって、Ｆｅ−Ｚｎ合金めっき鋼板を製
造する方法としてはＦｅ濃度６％、へＮ０１１％添加し
てＺｎ浴に、酸化、還元、焼鈍等の前処理を行った鋼板
を浸漬して、直ちに、冷却することによって製造でき、
表面性状、曲げ等の加工性、パウダリング性等のめっき
密着性に優れた防錆鋼板とすることができる。Therefore, a method for producing Fe-Zn alloy plated steel sheet by adding a low melting point metal such as An to a Zn bath containing 6% Fe is to add 11% N0 to a Zn bath with an Fe concentration of 6%. It can be produced by immersing a steel plate that has undergone pretreatment such as oxidation, reduction, annealing, etc. and immediately cooling it.
It is possible to obtain a rust-proof steel sheet with excellent surface properties, workability such as bending, and plating adhesion such as powdering property.
（実 施 例）
つぎに本発明の実施例を比較例とともに第１表に挙げる
。(Examples) Next, Examples of the present invention are listed in Table 1 along with comparative examples.
注６：Ｚｎ浴中へ鋼板帯を連続的に導入し、めっき後、
ガスワイプにより目付量（ｇ／ｍ”）を調整し、片面と
裏側の他面と違うものについては目付調整のガス圧を変
えて調整した。Note 6: The steel plate strip is continuously introduced into the Zn bath, and after plating,
The basis weight (g/m'') was adjusted using a gas wipe, and when one side was different from the other side, the gas pressure for adjusting the basis weight was adjusted.
注７＝耐蝕性は７０℃乾燥３時間−塩水（３％×５０℃
）２時間−室温放置２時間−塩水噴霧試験（ＪＩＳ Ｚ
２３７１に：準拠）１．５時間→湿潤（８０％湿度、５
０℃） １５．４時間、このサイクルで１０サイクル処
理後の赤錆発生面積（％）を測定。（１０％以下では実
用上差支えなし。）注８：パウダリング評点は０．８ｍ
ｍの鋼板を挟み密着曲げ、いわゆる、１を曲げを実施し
、めっきの密着性を標準試料と比較した。なお、評点の
数字が小さい方が密着性はよい。Note 7 = Corrosion resistance is 70℃ drying for 3 hours - salt water (3% x 50℃
)2 hours - left at room temperature for 2 hours - salt spray test (JIS Z
2371: Compliant) 1.5 hours → Humidity (80% humidity, 5
0°C) 15.4 hours, and the area (%) where red rust occurred was measured after 10 cycles of this cycle. (There is no practical problem at 10% or less.) Note 8: Powdering rating is 0.8m
A steel plate of m was sandwiched and bent in close contact, so-called bending of 1 was performed, and the adhesion of the plating was compared with a standard sample. Note that the smaller the rating number, the better the adhesion.
（評点２以下では実用上差支えなし。）注９＝スポット
溶接電極寿命（点）は下記の溶接条件で連続打点溶接を
実施した。(A rating of 2 or less does not pose a practical problem.) Note 9 = Spot welding electrode life (points) Continuous spot welding was performed under the following welding conditions.
溶接条件は下記による。The welding conditions are as follows.
１）加圧カニ ２５０ ｋｇｆ 。1) Pressure crab 250 kgf.
２）初期加圧時間：４０Ｈｚ、 ３）通電時間：１２）ＩＺ。2) Initial pressurization time: 40Hz, 3) Energization time: 12) IZ.
４）保持時間：５Ｈｚ、
５）溶接電流：１１ｋＡ、
６）チップ先端径：５．０φ（円錐台頭型）、７）電極
寿命終点判定：溶接電流の８５％でのナゲツト径が３．
６）を確保できる打点数、
８）電極材質：Ｃｕ−Ｃｒ（一般に用いられているもの
）。4) Holding time: 5Hz, 5) Welding current: 11kA, 6) Tip tip diameter: 5.0φ (cone-shaped), 7) Electrode life end point determination: Nugget diameter at 85% of welding current is 3.
6) Number of dots that can ensure 8) Electrode material: Cu-Cr (generally used).
溶接は、めっき鋼板の片面を上、他面を下として、２枚
重ね合わせて連続打点数をとった。Welding was performed by stacking two plated steel plates with one side up and the other side down, and counting the number of consecutive welding points.
（発明の効果）
かくすることにより、防錆鋼板としての特性に優れた鋼
板とすることができ、製造コストの面でも優位な製造方
法であり、厚目付とすることによる従来のＦｅ−Ｚｎ合
金めっきのめっき密着性の劣化を危惧することなく、加
工性、防錆性の優れた溶融Ｆｅ−Ｚｎ合金めっき鋼板と
することができる。(Effects of the invention) By doing this, a steel plate with excellent properties as a rust-proof steel plate can be obtained, and the manufacturing method is also advantageous in terms of manufacturing cost, and is superior to conventional Fe-Zn alloys by making it thicker. A hot-dip Fe-Zn alloy plated steel sheet with excellent workability and rust prevention can be obtained without worrying about deterioration of plating adhesion.
第１図はＦｅ−Ｚｎ浴への肩の添加量と浴表面の酸化と
、対応するスカムの酸素とＺｎの比の関係を示す図、第
２図はＦｅ−Ｚｎ浴へのＡＵの添加量と浴の粘度の関係
を示す図である。
化４名Figure 1 shows the relationship between the amount of shoulder added to the Fe-Zn bath, the oxidation of the bath surface, and the corresponding ratio of oxygen to Zn in the scum, and Figure 2 shows the amount of AU added to the Fe-Zn bath. FIG. 4 people
Claims (1)
Ｓｎ，Ｓｂ，Ｍｇ，Ｓｉ，Ｃｕ，Ｂｉ，Ｔｉ，Ｐの１種
または２種以上を０．０１〜０．５０％を添加し、浴温
６００〜９００℃でめっきすることを特徴とする、Ｆｅ
−Ｚｎ合金めっき鋼板の製造方法。1. Al, Pb,
It is characterized by adding 0.01 to 0.50% of one or more of Sn, Sb, Mg, Si, Cu, Bi, Ti, and P and plating at a bath temperature of 600 to 900°C. Fe
- A method for producing a Zn alloy plated steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27709290A JPH04154950A (en) | 1990-10-16 | 1990-10-16 | Production of fe-zn alloy coated steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27709290A JPH04154950A (en) | 1990-10-16 | 1990-10-16 | Production of fe-zn alloy coated steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04154950A true JPH04154950A (en) | 1992-05-27 |
Family
ID=17578665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27709290A Pending JPH04154950A (en) | 1990-10-16 | 1990-10-16 | Production of fe-zn alloy coated steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04154950A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100369216B1 (en) * | 1998-12-29 | 2003-03-29 | 주식회사 포스코 | Manufacturing method of hot-dip galvanized steel sheet with excellent corrosion resistance and surface appearance |
| WO2007088890A1 (en) | 2006-02-02 | 2007-08-09 | Ck Metals Co., Ltd. | Hot dip zinc plating bath and zinc-plated iron product |
| JP2009197328A (en) * | 2008-01-22 | 2009-09-03 | Jfe Steel Corp | Method for producing hot dip galvanized steel pipe and hot dip galvanized material |
| JP4497431B1 (en) * | 2010-01-26 | 2010-07-07 | 株式会社駒形亜鉛鍍金所 | Hot dip galvanizing |
-
1990
- 1990-10-16 JP JP27709290A patent/JPH04154950A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100369216B1 (en) * | 1998-12-29 | 2003-03-29 | 주식회사 포스코 | Manufacturing method of hot-dip galvanized steel sheet with excellent corrosion resistance and surface appearance |
| WO2007088890A1 (en) | 2006-02-02 | 2007-08-09 | Ck Metals Co., Ltd. | Hot dip zinc plating bath and zinc-plated iron product |
| US7811674B2 (en) | 2006-02-02 | 2010-10-12 | Ck Metals Co., Ltd. | Hot-dip galvanizing bath and galvanized iron article |
| JP2009197328A (en) * | 2008-01-22 | 2009-09-03 | Jfe Steel Corp | Method for producing hot dip galvanized steel pipe and hot dip galvanized material |
| JP4497431B1 (en) * | 2010-01-26 | 2010-07-07 | 株式会社駒形亜鉛鍍金所 | Hot dip galvanizing |
| JP2011153326A (en) * | 2010-01-26 | 2011-08-11 | Komagata Galvanizing Co Ltd | Hot-dip galvanization |
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