JP2019203181A - Method for producing chemically plated steel sheet - Google Patents
Method for producing chemically plated steel sheet Download PDFInfo
- Publication number
- JP2019203181A JP2019203181A JP2018100588A JP2018100588A JP2019203181A JP 2019203181 A JP2019203181 A JP 2019203181A JP 2018100588 A JP2018100588 A JP 2018100588A JP 2018100588 A JP2018100588 A JP 2018100588A JP 2019203181 A JP2019203181 A JP 2019203181A
- Authority
- JP
- Japan
- Prior art keywords
- plated steel
- steel sheet
- steel plate
- chemical conversion
- cleaning
- 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
- Chemical Treatment Of Metals (AREA)
Abstract
Description
本発明は、化成処理めっき鋼板の製造方法に関する。特に、化成処理としてリン酸亜鉛処理を施すリン酸亜鉛処理鋼板の製造方法に関する。 The present invention relates to a method for producing a chemically treated plated steel sheet. In particular, it is related with the manufacturing method of the zinc phosphate processing steel plate which performs a zinc phosphate process as chemical conversion treatment.
リン酸亜鉛系被膜を有する鋼板（以下、リン酸亜鉛処理鋼板と称す）は、プレス成形時の摺動抵抗が小さく、鋼板をプレス金型へ流入させやすいため、自動車車体用途を中心に用いられている。 Steel sheets with zinc phosphate coating (hereinafter referred to as zinc phosphate-treated steel sheets) have low sliding resistance during press forming and are easy to flow into the press mold, so they are mainly used for automobile bodies. ing.
リン酸亜鉛処理鋼板は、例えば、冷延鋼板上に亜鉛めっきを施した後、表面調整液を鋼板表面に吹き掛けリン酸亜鉛結晶の核となる物質を鋼板表面に散布した後、リン酸亜鉛処理を施してリン酸亜鉛被膜を形成させ製造される
リン酸亜鉛処理方法としては、スプレー方式やコーター方式が挙げられる。いずれの処理方法も、反応型の化成処理被膜（リン酸亜鉛被膜）であるため、鋼板表面において反応ムラが発生しやすい。特にスプレー方式は、スプレー時に処理液が不均一となり易く反応ムラが発生しやすい。
Zinc phosphate-treated steel sheet, for example, after galvanizing on a cold-rolled steel sheet, spraying a surface conditioning liquid on the surface of the steel sheet and spraying a substance that becomes the core of zinc phosphate crystals on the surface of the steel sheet, followed by zinc phosphate Examples of the zinc phosphate treatment method produced by forming a zinc phosphate coating by treatment include a spray method and a coater method. Since any of the treatment methods is a reactive chemical conversion coating (zinc phosphate coating), uneven reaction tends to occur on the steel sheet surface. In particular, in the spray method, the treatment liquid tends to be non-uniform during spraying, and reaction unevenness tends to occur.
そこで特許文献１には、表面調整処理の直後にエアーを吹き付けることで鋼板上に付着した表面調整液を均一にレベリングし、リン酸亜鉛処理の反応ムラを抑制する方法が記載されている。 Therefore, Patent Document 1 describes a method of uniformly leveling the surface adjustment liquid adhering to the steel sheet by blowing air immediately after the surface adjustment process and suppressing reaction unevenness in the zinc phosphate treatment.
特許文献１の技術によれば、リン酸亜鉛処理の反応ムラを抑制することは可能である。しかしながら、エアー量が増大すると、エアー起因のムラが発生してしまう等、抑制しきれないムラが発生する。特に、裏面側の両エッジに白色ムラが頻繁に発生し、ライン幅に対し狭幅の鋼板を製造する場合は、白色ムラが顕著に発生するといった問題がある。 According to the technique of Patent Document 1, it is possible to suppress uneven reaction of zinc phosphate treatment. However, when the air amount increases, unevenness that cannot be suppressed occurs, such as unevenness caused by air. In particular, white unevenness frequently occurs at both edges on the back side, and when a steel sheet having a narrow width relative to the line width is manufactured, there is a problem that white unevenness occurs remarkably.
本発明は、かかる事情に鑑みてなされたものであって、白色ムラなどの反応ムラが軽減された表面性状に優れた化成処理めっき処理鋼板の製造方法を提供することを目的とする。 This invention is made | formed in view of this situation, Comprising: It aims at providing the manufacturing method of the chemical conversion treatment plating steel plate excellent in the surface property by which reaction nonuniformity, such as white nonuniformity, was reduced.
本発明者らが鋭意検討した結果、めっき液残渣の洗浄工程において、鋼板表面側に噴射する洗浄水（水スプレー）の流量が増大するにつれ、鋼板裏面側の両エッジを中心に白色ムラの悪化傾向が見られるという知見を得た。そこで、鋼板表面側の洗浄水（水スプレー）の流量を鋼板の板幅に基づいて制御することで、白色ムラを解消することができることを見出した。 As a result of intensive studies by the present inventors, as the flow rate of cleaning water (water spray) sprayed to the steel sheet surface side increases in the plating solution residue cleaning process, white unevenness worsens mainly on both edges on the steel sheet back side. The knowledge that a tendency is seen was acquired. Thus, it has been found that white unevenness can be eliminated by controlling the flow rate of cleaning water (water spray) on the steel sheet surface side based on the sheet width of the steel sheet.
本発明は、以上の知見に基づきなされたものであり、その要旨は以下の通りである。
［１］めっき鋼板に噴射する洗浄水の流量を、前記めっき鋼板の板幅に基づいて制御する洗浄工程を施した後、表面調整工程および化成処理工程を施すことを特徴とする化成処理めっき鋼板の製造方法。
［２］前記洗浄工程では、前記めっき鋼板の一方の面に前記洗浄水を噴射し、鋼板幅が小さいほど前記洗浄水の流量を少なくすることを特徴とする［１］に記載の化成処理めっき鋼板の製造方法。
［３］ 前記洗浄工程では、前記めっき鋼板の他方の面への洗浄水回り込みを抑制するように、前記一方の面に前記洗浄水を噴射し、鋼板幅が小さいほど前記洗浄水の流量を少なくすることを特徴とする［２］に記載の化成処理めっき鋼板の製造方法。
［４］前記洗浄工程では、前記洗浄水を噴射するノズルの噴射圧力が、０．０５ＭＰａ超えであることを特徴とする［２］または［３］に記載の化成処理めっき鋼板の製造方法。
［５］前記洗浄工程において、前記めっき鋼板表面と、前記洗浄水を噴射するノズル先端との距離は、１００〜４００ｍｍであることを特徴とする［２］〜［４］のいずれかに記載の化成処理めっき鋼板の製造方法。
［６］前記洗浄工程において、前記めっき鋼板の幅が９００〜１２００ｍｍの場合、前記洗浄水の噴射幅を９００〜１０００ｍｍとすることを特徴とする［２］〜［５］のいずれかに記載の化成処理めっき鋼板の製造方法。
［７］前記表面調整工程において、洗浄された前記めっき鋼板に塗布する表面調整液は、Ｔｉコロイドを含有し、
前記化成処理工程において、表面調整を施された前記めっき鋼板に塗布する化成処理液は、リン酸亜鉛系処理液であることを特徴とする［１］〜［６］のいずれかに記載の化成処理めっき鋼板の製造方法。
The present invention has been made based on the above findings, and the gist thereof is as follows.
[1] A chemically treated plated steel sheet, which is subjected to a cleaning process for controlling the flow rate of cleaning water sprayed on the plated steel sheet based on the width of the plated steel sheet, followed by a surface adjustment process and a chemical conversion process. Manufacturing method.
[2] The chemical conversion plating according to [1], wherein in the cleaning step, the cleaning water is sprayed on one surface of the plated steel sheet, and the flow rate of the cleaning water is reduced as the steel sheet width is reduced. A method of manufacturing a steel sheet.
[3] In the cleaning step, the cleaning water is sprayed onto the one surface so as to prevent the cleaning water from flowing into the other surface of the plated steel sheet, and the flow rate of the cleaning water decreases as the steel sheet width decreases. The method for producing a chemical conversion plated steel sheet according to [2], wherein:
[4] The method for producing a chemically treated plated steel sheet according to [2] or [3], wherein in the cleaning step, an injection pressure of a nozzle for injecting the cleaning water exceeds 0.05 MPa.
[5] In the cleaning step, the distance between the surface of the plated steel plate and the tip of the nozzle that sprays the cleaning water is 100 to 400 mm, according to any one of [2] to [4] The manufacturing method of a chemical conversion treatment plated steel plate.
[6] In the cleaning step, when the plated steel sheet has a width of 900 to 1200 mm, the cleaning water injection width is set to 900 to 1000 mm. The manufacturing method of a chemical conversion treatment plated steel plate.
[7] In the surface conditioning step, the surface conditioning liquid applied to the washed plated steel sheet contains Ti colloid,
The chemical conversion treatment liquid according to any one of [1] to [6], wherein in the chemical conversion treatment step, the chemical conversion treatment liquid applied to the plated steel sheet having the surface adjusted is a zinc phosphate-based treatment liquid. A method for producing a treated plated steel sheet.
本発明によれば、製造条件を変更することなく、また、大規模な設備改造も実施することなく、反応ムラを軽減することができる。本発明によれば、特に鋼板裏面側の両エッジの白色ムラを軽減することができる。その結果、表面性状に優れた化成処理めっき鋼板が製造できる。 According to the present invention, reaction unevenness can be reduced without changing manufacturing conditions and without performing large-scale facility modifications. According to the present invention, white unevenness at both edges on the back side of the steel sheet can be reduced. As a result, a chemically treated plated steel sheet having excellent surface properties can be produced.
本発明の詳細を以下に説明する。 Details of the present invention will be described below.
本発明では、めっき鋼板に噴射する洗浄水の流量を、めっき鋼板の板幅に基づいて制御する洗浄工程を施した後、表面調整工程および化成処理工程を施すことにより、化成処理鋼板が製造される。 In the present invention, the chemical conversion treated steel sheet is manufactured by performing the surface adjustment process and the chemical conversion treatment process after performing the cleaning process of controlling the flow rate of the cleaning water sprayed onto the plated steel sheet based on the plate width of the plated steel sheet. The
本発明では、洗浄工程において、めっき鋼板に噴射する洗浄水の流量を、めっき鋼板の板幅に基づいて制御することを特徴とする。めっき鋼板に噴射する洗浄水の流量を、めっき鋼板の板幅に基づいて制御することにより、表面性状に優れた化成処理めっき鋼板を得ることができる。その理由を以下に説明する。 The present invention is characterized in that in the cleaning step, the flow rate of the cleaning water sprayed onto the plated steel sheet is controlled based on the plate width of the plated steel sheet. By controlling the flow rate of the cleaning water sprayed on the plated steel sheet based on the plate width of the plated steel sheet, a chemically treated plated steel sheet having excellent surface properties can be obtained. The reason will be described below.
本発明者らは、リン酸亜鉛処理鋼板の製造工程において、鋼板裏面側の両エッジに発生する白色ムラ（以下、白色ムラを単にムラと称することもある。）の発生原因について調査した。リン酸亜鉛処理鋼板は、例えば、冷延鋼板に硫酸亜鉛浴による電気亜鉛めっきを実施した後、めっき液残渣を洗浄水（水スプレー）により洗浄し、その後、リン酸亜鉛処理時の反応核となるＴｉコロイドを含有させている表面調整液による表面調整を施した後、リン酸亜鉛処理液を鋼板表面に塗布することによりリン酸亜鉛被膜を形成させることにより、得られる。 The inventors investigated the cause of the occurrence of white unevenness (hereinafter, white unevenness may be simply referred to as unevenness) generated at both edges on the back surface side of the steel sheet in the manufacturing process of the zinc phosphate-treated steel sheet. For example, after the zinc phosphate treated steel sheet is electro-galvanized on a cold-rolled steel sheet using a zinc sulfate bath, the plating solution residue is washed with washing water (water spray), and then the reaction nucleus at the time of zinc phosphate treatment It is obtained by forming a zinc phosphate coating by applying a surface treatment with a surface conditioning solution containing Ti colloid, and then applying a zinc phosphate treatment solution to the surface of the steel sheet.
本発明者らが検討した結果、めっき液残渣の洗浄工程において、鋼板表面側の洗浄水の流量が増大するにつれ、鋼板裏面側の両エッジに白色ムラが非常に高い頻度で発生するという、ムラの悪化傾向が見られることが判明した。そして、鋼板裏面側の両エッジに発生するムラの発生原因は、鋼板表面側のめっき液残渣を洗浄する洗浄水の鋼板表面近傍の幅方向における流量が大きいことで、余分な水量が増大し、洗浄水の流速が高まるため、鋼板裏面側の両エッジ付近に鋼板表面側のめっき液を含んだ洗浄水が回りこむことによる洗浄水溜まりであることがわかった。また、一般的に、鋼板は図１に示すように、上に凸に反りやすくなっており、鋼板裏面側への洗浄水の回り込みが起きやすくなっている。なお、鋼板が上に凸に反っていない場合でも、鋼板裏面側への洗浄水の回り込みは起きると考えられる。 As a result of the study by the present inventors, in the plating solution residue cleaning process, as the flow rate of the cleaning water on the steel plate surface side increases, white unevenness occurs at both edges on the steel plate back side at a very high frequency. It turned out that the tendency of worsening is seen. And the cause of the occurrence of unevenness occurring at both edges on the steel plate back side is that the flow rate in the width direction in the vicinity of the steel plate surface of the cleaning water for washing the plating solution residue on the steel plate surface side is large, and the excess water amount increases. Since the flow rate of the cleaning water increased, it was found that the cleaning water pool was caused by the cleaning water containing the plating solution on the steel sheet surface side around both edges on the back surface side of the steel sheet. In general, as shown in FIG. 1, the steel sheet is likely to warp upward and the cleaning water tends to wrap around the back side of the steel sheet. In addition, even when the steel plate is not warped upward, it is considered that the cleaning water wraps around the steel plate back side.
さらに、図１に示すような洗浄水の回り込みの結果、表面調整液中のリン酸塩の核となる成分の吸着が不均一となることで、リン酸亜鉛結晶の付着量が局部的に不均一となり、リン酸亜鉛結晶の形に差異が生まれる。その結果、ムラが発生すると考えた。 Further, as a result of the wraparound of the washing water as shown in FIG. 1, the adsorption of the component that becomes the nucleus of the phosphate in the surface conditioning liquid becomes non-uniform, so that the amount of zinc phosphate crystals attached is locally non-uniform. It becomes uniform and a difference is generated in the shape of the zinc phosphate crystals. As a result, it was considered that unevenness occurred.
したがって、鋼板表面側の洗浄水の流量を抑えることで、鋼板裏面側の両エッジへの洗浄水の回りこみを抑制し、鋼板裏面側の両エッジのめっき液残渣溜まりを解消することができ、その結果、ムラを解消できると考えた。 Therefore, by suppressing the flow rate of the cleaning water on the steel sheet surface side, it is possible to suppress the spilling of the cleaning water to both edges on the steel sheet back side, and eliminate plating solution residue pools on both edges on the steel sheet back side. As a result, it was thought that unevenness could be eliminated.
洗浄水の流量が少なすぎると、洗浄不足によるムラが発生するため、適切な流量設定が必要であり、同一流量でも、鋼板の幅が小さくなるにつれ、裏面への洗浄水の回り込み量は増大するため、幅が小さくなるにつれ、洗浄水の流量を低下させることが重要である。ここで洗浄水の流量とは、単位時間当たりにノズルから噴射される洗浄水量に限定されず、鋼板表面近傍で計測される流量や流速、洗浄水の噴射圧力、洗浄水の噴射幅等、相互に単調増加関係がある各種物理量を含めることとする。 If the flow rate of cleaning water is too small, unevenness due to insufficient cleaning will occur, so it is necessary to set an appropriate flow rate. Even at the same flow rate, as the width of the steel plate becomes smaller, the amount of cleaning water flowing into the back surface will increase. Therefore, it is important to reduce the flow rate of the cleaning water as the width becomes smaller. Here, the flow rate of the cleaning water is not limited to the amount of cleaning water sprayed from the nozzle per unit time, but the flow rate and flow velocity measured near the surface of the steel plate, the spraying pressure of the cleaning water, the spraying width of the cleaning water, etc. Include various physical quantities that have a monotonically increasing relationship.
本発明では、洗浄工程では、めっき鋼板の一方の面に洗浄水を噴射し、噴射幅が小さいほど洗浄水の流量を少なくすることが好ましい。図１に示すように、めっき鋼板の一方の面の洗浄水、すなわち、鋼板表面側に噴射する洗浄水により、ムラが発生する。したがって、本発明では、めっき鋼板の一方の面（鋼板表面側）に噴射する洗浄水の流量を抑えることが好ましく、洗浄水については、噴射幅が小さいほど洗浄水の流量を少なくすることが好ましい。例えば、鋼板幅Ｗと洗浄水の流量に対応するＰとは、以下の式（１）の様な近似式を満たすことが好ましい。
Ｐ＜０．００７１×Ｗ−１．４３・・・（１）
ただし、上記式（１）において、
Ｐ：流量（ＭＰａ）
Ｗ：鋼板幅（ｍｍ）
である。
In the present invention, in the cleaning step, it is preferable that the cleaning water is sprayed on one surface of the plated steel sheet, and the flow rate of the cleaning water is reduced as the spray width is smaller. As shown in FIG. 1, unevenness occurs due to the cleaning water on one surface of the plated steel sheet, that is, the cleaning water sprayed to the steel sheet surface side. Therefore, in the present invention, it is preferable to suppress the flow rate of the cleaning water sprayed on one surface (the steel plate surface side) of the plated steel plate. For the cleaning water, it is preferable to reduce the flow rate of the cleaning water as the spray width is small. . For example, it is preferable that the steel plate width W and the P corresponding to the flow rate of cleaning water satisfy an approximate expression such as the following expression (1).
P <0.0071 × W−1.43 (1)
However, in the above formula (1),
P: Flow rate (MPa)
W: Steel plate width (mm)
It is.
上述したようなムラ（白色ムラ）について、ライン幅に対し狭幅の鋼板を製造する場合、白色ムラが顕著に発生するといった問題がある。したがって、製造する鋼板幅が小さい程、スプレー噴出幅を狭めることで、洗浄水の流量調整と同様の効果が得られると考えられる。そこで本発明では、鋼板幅が９００〜１２００ｍｍの場合、洗浄水の噴射幅を９００〜１０００ｍｍとすることが好ましい。 As for the unevenness (white unevenness) as described above, there is a problem that white unevenness occurs remarkably when a steel sheet having a width narrower than the line width is manufactured. Therefore, it is considered that the same effect as the flow rate adjustment of the washing water can be obtained by narrowing the spray jet width as the width of the steel plate to be manufactured is smaller. Therefore, in the present invention, when the steel plate width is 900 to 1200 mm, it is preferable that the spray width of the cleaning water is 900 to 1000 mm.
なお、めっき鋼板の一方の面（鋼板表面側）に噴射する洗浄水の流量は、板幅が小さいほど洗浄水の流量を少なくする相関関係を満たせばよく、より好ましくは上記の様な近似式に従って流量を設定する事が望ましいが、上記式に限られない。上記式ではＷとＰとを含む一次直線による近似式の例を示したが、他の変数を含む近似式としたり、二次曲線としてもよい。また、上記相関関係を満たす範囲内で、適宜設備仕様に合せて流量を設定してよい。具体的な流量の設定は、鋼板裏面側の両エッジに発生するムラの発生有無、めっき鋼板の他方の面（鋼板裏面側）への洗浄水回り込み状態を確認しながら適宜行えばよい。 In addition, the flow rate of the cleaning water sprayed on one surface of the plated steel plate (the steel plate surface side) only needs to satisfy the correlation of decreasing the flow rate of the cleaning water as the plate width is smaller, and more preferably the approximate expression as described above. Although it is desirable to set the flow rate according to In the above formula, an example of an approximate expression using a linear line including W and P is shown, but an approximate expression including other variables or a quadratic curve may be used. In addition, the flow rate may be set according to equipment specifications as appropriate within the range satisfying the above correlation. A specific flow rate may be set as appropriate while confirming whether or not unevenness occurs at both edges on the back surface side of the steel sheet and the state of cleaning water flowing into the other surface of the plated steel sheet (back surface side of the steel sheet).
また、さらにめっき鋼板の一方の面（鋼板表面側）に噴射する洗浄水の流量の下限値を設定することにより、鋼板表面のエッジ白ムラ、飛散ムラを抑制できる。本発明では、洗浄水の流量に対応するノズル噴射圧力の下限値が、０．０５ＭＰａ超えであることが好ましく、０．０７ＭＰａ超えであることがより好ましい。 Further, by setting a lower limit value of the flow rate of the cleaning water sprayed to one surface (steel plate surface side) of the plated steel plate, edge white unevenness and scattering unevenness on the steel plate surface can be suppressed. In the present invention, the lower limit value of the nozzle injection pressure corresponding to the flow rate of the cleaning water is preferably more than 0.05 MPa, more preferably more than 0.07 MPa.
また、洗浄水を吹きつける際の、ノズル先端と鋼板との距離は１００〜４００ｍｍとすることが好ましい。 Moreover, it is preferable that the distance between the nozzle tip and the steel plate when spraying the cleaning water is 100 to 400 mm.
また、鋼板表面への洗浄水の吹きつけのノズルの形状は特に制限が無く、スリット状のノズルやスプレー式のノズルが挙げられる。 Further, the shape of the nozzle for spraying the cleaning water onto the steel plate surface is not particularly limited, and examples thereof include a slit nozzle and a spray type nozzle.
なお、鋼板裏面側の洗浄水の流量については、特段制御する必要はなく、０．１ＭＰａ程度であればよい。 In addition, about the flow volume of the washing water at the steel plate back side, it is not necessary to perform special control, and it may be about 0.1 MPa.
本発明に用いるめっき鋼板としては特に限定されないが、亜鉛めっき鋼板または亜鉛系めっき鋼板であることが好ましい。亜鉛めっき鋼板または亜鉛系めっき鋼板については特に限定がなく、純亜鉛めっき鋼板、Ｚｎ−Ａｌめっき鋼板やＺｎ−Ｎｉめっき鋼板等の合金めっき鋼板のいずれについても用いることができる。また、めっき処理方法についても特に限定がなく、電気めっき、溶融めっき、蒸着めっき等いずれも用いることができる。 Although it does not specifically limit as a plated steel plate used for this invention, It is preferable that it is a galvanized steel plate or a galvanized steel plate. There is no particular limitation on the galvanized steel sheet or the galvanized steel sheet, and any galvanized steel sheet, alloy-plated steel sheet such as Zn-Al plated steel sheet or Zn-Ni plated steel sheet can be used. Further, the plating method is not particularly limited, and any of electroplating, hot dipping, vapor deposition plating and the like can be used.
本発明では、表面調整工程において、洗浄されためっき鋼板に塗布する表面調整液は、Ｔｉコロイドを含有し、化成処理工程において、表面調整を施されためっき鋼板に塗布する化成処理液は、リン酸亜鉛系処理液であることが好ましい。 In the present invention, the surface conditioning liquid applied to the cleaned plated steel sheet in the surface conditioning step contains Ti colloid, and the chemical conversion treatment liquid applied to the plated steel sheet subjected to the surface conditioning in the chemical conversion treatment process is phosphorous. A zinc acid-based treatment liquid is preferred.
リン酸亜鉛系処理を行う前に表面調整処理を行うことで、リン酸亜鉛系処理時にリン酸亜鉛系処理液とめっきとの反応性を増大させることができる。 By performing the surface adjustment treatment before the zinc phosphate treatment, the reactivity between the zinc phosphate treatment solution and the plating can be increased during the zinc phosphate treatment.
表面調整液中には、Ｔｉコロイドを含有することが好ましい。表面調整液中にＴｉコロイドを含有させることで、Ｔｉコロイドは分散性が高いためその後のリン酸亜鉛処理時の反応核となりリン酸亜鉛被膜を形成することができる。しかしながら、表面調整液中にＴｉコロイドを含有する場合、表面調整液が不均一な散布状態となれば、リン酸亜鉛結晶の付着量が局部的に不均一となり、リン酸亜鉛結晶の形に差異が生まれ易くなる。これに対して、本発明では、表面調整液が不均一な散布状態になったとしても、その直後に気体を吹き付けることで、表面調整液が均一にレベリングされ、その後のリン酸亜鉛処理時も反応ムラが抑えられた均一な反応状態になると考えられる。 The surface conditioning liquid preferably contains Ti colloid. By containing the Ti colloid in the surface conditioning liquid, the Ti colloid has high dispersibility, so that it becomes a reaction nucleus during the subsequent zinc phosphate treatment and can form a zinc phosphate coating. However, when Ti colloid is contained in the surface conditioning liquid, if the surface conditioning liquid is in a non-uniform spraying state, the amount of zinc phosphate crystals deposited becomes locally non-uniform, resulting in differences in the shape of the zinc phosphate crystals. Becomes easier to be born. On the other hand, in the present invention, even when the surface conditioning liquid is in a non-uniform sprayed state, the surface conditioning liquid is uniformly leveled by spraying the gas immediately after that, even during the subsequent zinc phosphate treatment. It is considered that a uniform reaction state with reduced reaction unevenness is obtained.
表面調整処理の方法としては、めっき鋼板を表面調整液中に浸漬する方法、めっき鋼板に表面調整液をスプレーする方法等が挙げられる。 Examples of the surface conditioning treatment include a method of immersing a plated steel sheet in a surface conditioning liquid, a method of spraying a surface conditioning liquid on the plated steel sheet, and the like.
リン酸亜鉛系処理液としては、特に限定はしない。通常用いられるリン酸亜鉛系処理液を用いることができる。Ｚｎイオン、リン酸イオンの他に硝酸イオン、Ｆ化合物等を含有するものを用いることができる。Ｎｉ、Ｍｎ、Ｍｇ、Ｃｏ、Ｆｅ、Ｃｕを含有させることもできる。 There is no particular limitation on the zinc phosphate processing solution. A commonly used zinc phosphate-based treatment solution can be used. What contains nitrate ion, F compound, etc. in addition to Zn ion and phosphate ion can be used. Ni, Mn, Mg, Co, Fe, Cu can also be contained.
鋼板のリン酸亜鉛処理法としては、特に限定しない。スプレー方式やコーター方式等、従来から用いられている方法を好適に用いることができる。スプレーを用いてリン酸亜鉛被膜を形成することが好ましい。本発明は、実施例としてスプレー方式のリン酸亜鉛処理を行なっているが、原理上、コーター方式のリン酸亜鉛処理にも適用される。 It does not specifically limit as a zinc phosphate processing method of a steel plate. Conventionally used methods such as a spray method and a coater method can be suitably used. It is preferable to form a zinc phosphate coating using a spray. In the present invention, spray zinc phosphate treatment is performed as an example, but in principle, the present invention is also applicable to coater zinc phosphate treatment.
本発明を実施例により更に詳細に説明する。 The present invention will be described in more detail with reference to examples.
冷間圧延後焼鈍を施した板厚0.7〜0.8ｍｍの鋼板上に、付着量が４０ｇ／ｍ２となるように電気亜鉛めっきを施した。次いで、表２に示す流量の洗浄水でめっき液の洗浄を行った後、鋼板の表面上に表面調整液（チタンコロイド系処理液、日本パーカライジング（株）製ＰＬ−ＺＮ３．０ｇ／Ｌ）を塗布し４０℃に３秒浸漬させることで表面調整処理を行った。次いで、表１に示す浴組成からなるリン酸亜鉛系処理液を鋼板表面に吹き付けることで、リン酸亜鉛系被膜を１．５ｇ／ｍ２形成しリン酸亜鉛処理鋼板を製造した。リン酸亜鉛系処理液の鋼板表面への吹き付けはスプレーを用いた。 Electrogalvanizing was performed on a steel sheet having a thickness of 0.7 to 0.8 mm that had been annealed after cold rolling so that the adhesion amount was 40 g / m 2 . Next, after the plating solution was washed with the washing water having the flow rate shown in Table 2, a surface conditioning solution (titanium colloid-based treatment solution, PL-ZN 3.0 g / L manufactured by Nihon Parkerizing Co., Ltd.) was applied on the surface of the steel plate. The surface adjustment treatment was performed by applying and dipping at 40 ° C. for 3 seconds. Subsequently, the zinc phosphate type processing liquid which consists of a bath composition shown in Table 1 was sprayed on the steel plate surface, 1.5 g / m < 2 > of zinc phosphate type coating films were formed, and the zinc phosphate processing steel plate was manufactured. Spray was used to spray the zinc phosphate-based treatment liquid onto the steel sheet surface.
以上により得られたリン酸亜鉛処理鋼板に対して、鋼板表面のムラを目視にて観察した。鋼板表裏面については、エッジ部の白色ムラ（エッジ白色ムラ）の有無を確認するとともに、鋼板表面については飛散ムラの有無も確認した。なお、エッジ白色ムラとは、鋼板エッジ部と中心部でリン酸塩被膜の結晶形態に差異が生まれることで発生するムラである。また、飛散ムラとは、表面調整液のスプレー散布にて、液の散布が不均一であることで飛散状に発生するムラである。 The unevenness on the surface of the steel sheet was visually observed with respect to the zinc phosphate-treated steel sheet obtained as described above. About the steel plate front and back, while confirming the presence or absence of the white nonuniformity (edge white nonuniformity) of an edge part, the presence or absence of scattering nonuniformity was also confirmed about the steel plate surface. In addition, edge white nonuniformity is nonuniformity which generate | occur | produces when a difference arises in the crystal form of a phosphate film in a steel plate edge part and center part. Further, the scattering unevenness is unevenness that occurs in a scattered state due to non-uniform spraying of the liquid in the spraying of the surface conditioning liquid.
また、各ムラの判定において、○は均一でムラなし、△は一部にムラ有り、×は全面にムラ有りである。鋼板裏面の評価結果（エッジ白色ムラ）が○であり、かつ鋼板表面の評価結果（エッジ白色ムラおよび飛散ムラ）に×がないものを合格とした。 In the determination of each unevenness, ○ is uniform and uneven, Δ is partially uneven, and × is uneven. The evaluation result (edge white unevenness) on the back surface of the steel sheet was ○, and the evaluation result (edge white unevenness and scattering unevenness) on the steel sheet surface was not acceptable.
以上により得られた結果を条件と併せて表２に示す。 The results obtained as described above are shown in Table 2 together with the conditions.
表２より、本発明によれば、洗浄水の流量を変更することでムラが軽減され、表面性状に優れた化成処理めっき鋼板を得ることができる。 From Table 2, according to this invention, a nonuniformity is reduced by changing the flow volume of washing water, and the chemical conversion treatment plated steel plate excellent in surface property can be obtained.
本発明は、以上の知見に基づきなされたものであり、その要旨は以下の通りである。
［１］めっき鋼板に噴射する洗浄水の流量を、前記めっき鋼板の板幅に基づいて制御する洗浄工程を施した後、表面調整工程および化成処理工程を施すことを特徴とする化成処理めっき鋼板の製造方法。
［２］前記洗浄工程では、前記めっき鋼板の一方の面に前記洗浄水を噴射し、鋼板幅が小さいほど前記洗浄水の流量を少なくすることを特徴とする［１］に記載の化成処理めっき鋼板の製造方法。
［３］ 前記洗浄工程では、前記めっき鋼板の他方の面への洗浄水回り込みを抑制するように、前記一方の面に前記洗浄水を噴射し、鋼板幅が小さいほど前記洗浄水の流量を少なくすることを特徴とする［２］に記載の化成処理めっき鋼板の製造方法。
［４］前記洗浄工程では、前記洗浄水を噴射するノズルの噴射圧力が、０．０５ＭＰａ超えであることを特徴とする［２］または［３］に記載の化成処理めっき鋼板の製造方法。
［５］前記洗浄工程において、前記めっき鋼板表面と、前記洗浄水を噴射するノズル先端との距離は、１００〜４００ｍｍであることを特徴とする［２］〜［４］のいずれかに記載の化成処理めっき鋼板の製造方法。
［６］前記洗浄工程において、前記めっき鋼板の幅が９００〜１２００ｍｍの場合、前記洗浄水の噴射幅を９００〜１０００ｍｍとすることを特徴とする［２］〜［５］のいずれかに記載の化成処理めっき鋼板の製造方法。
［７］前記表面調整工程において、洗浄された前記めっき鋼板に表面調整処理を行う表面調整液は、Ｔｉコロイドを含有し、
前記化成処理工程において、表面調整を施された前記めっき鋼板に化成処理を行う化成処理液は、リン酸亜鉛系処理液であることを特徴とする［１］〜［６］のいずれかに記載の化成処理めっき鋼板の製造方法。
The present invention has been made based on the above findings, and the gist thereof is as follows.
[1] A chemically treated plated steel sheet, which is subjected to a cleaning process for controlling the flow rate of cleaning water sprayed on the plated steel sheet based on the width of the plated steel sheet, followed by a surface adjustment process and a chemical conversion process. Manufacturing method.
[2] The chemical conversion plating according to [1], wherein in the cleaning step, the cleaning water is sprayed on one surface of the plated steel sheet, and the flow rate of the cleaning water is reduced as the steel sheet width is reduced. A method of manufacturing a steel sheet.
[3] In the cleaning step, the cleaning water is sprayed onto the one surface so as to prevent the cleaning water from flowing into the other surface of the plated steel sheet, and the flow rate of the cleaning water decreases as the steel sheet width decreases. The method for producing a chemical conversion plated steel sheet according to [2], wherein:
[4] The method for producing a chemically treated plated steel sheet according to [2] or [3], wherein in the cleaning step, an injection pressure of a nozzle for injecting the cleaning water exceeds 0.05 MPa.
[5] In the cleaning step, the distance between the surface of the plated steel plate and the tip of the nozzle that sprays the cleaning water is 100 to 400 mm, according to any one of [2] to [4] The manufacturing method of a chemical conversion treatment plated steel plate.
[6] In the cleaning step, when the plated steel sheet has a width of 900 to 1200 mm, the cleaning water injection width is set to 900 to 1000 mm. The manufacturing method of a chemical conversion treatment plated steel plate.
[7] In the surface conditioning step, the surface conditioning liquid for performing a surface conditioning treatment on the washed plated steel sheet contains a Ti colloid,
In the chemical conversion treatment step, the chemical conversion treatment liquid for performing chemical conversion treatment on the plated steel sheet that has been surface-adjusted is a zinc phosphate-based treatment liquid, according to any one of [1] to [6]. The manufacturing method of the chemical conversion treatment plated steel plate.
Claims (7)
前記化成処理工程において、表面調整を施された前記めっき鋼板に塗布する化成処理液は、リン酸亜鉛系処理液であることを特徴とする請求項１〜６のいずれかに記載の化成処理めっき鋼板の製造方法。 In the surface conditioning step, the surface conditioning liquid applied to the washed plated steel sheet contains Ti colloid,
The chemical conversion treatment plating according to any one of claims 1 to 6, wherein in the chemical conversion treatment step, the chemical conversion treatment solution applied to the plated steel sheet subjected to surface adjustment is a zinc phosphate-based treatment solution. A method of manufacturing a steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018100588A JP6927146B2 (en) | 2018-05-25 | 2018-05-25 | Manufacturing method of chemical conversion plated steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018100588A JP6927146B2 (en) | 2018-05-25 | 2018-05-25 | Manufacturing method of chemical conversion plated steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2019203181A true JP2019203181A (en) | 2019-11-28 |
| JP6927146B2 JP6927146B2 (en) | 2021-08-25 |
Family
ID=68726243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018100588A Active JP6927146B2 (en) | 2018-05-25 | 2018-05-25 | Manufacturing method of chemical conversion plated steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6927146B2 (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5446817U (en) * | 1977-09-08 | 1979-03-31 | ||
| JPS6068107A (en) * | 1983-09-24 | 1985-04-18 | Kawasaki Steel Corp | Method and device for cooling hot rolled steel sheet |
| JPS61193717A (en) * | 1985-02-20 | 1986-08-28 | Sumitomo Metal Ind Ltd | Uniform cooling method of steel plate |
| JPS6376883A (en) * | 1986-09-19 | 1988-04-07 | Nippon Parkerizing Co Ltd | Method for controlling surface regulating liquid for chemical conversion treatment of coated film by phosphate |
| JPS6428389A (en) * | 1987-07-24 | 1989-01-30 | Kawasaki Steel Co | Production of zn or zn alloy electroplated steel sheet having superior chemical treatability |
| JPH0216210U (en) * | 1988-07-15 | 1990-02-01 | ||
| JPH0247290A (en) * | 1988-08-05 | 1990-02-16 | Nisshin Steel Co Ltd | Post-treatment of electroplated steel sheet |
| JPH02101175A (en) * | 1988-08-24 | 1990-04-12 | Metallges Ag | Phosphate chemical forming treatment |
| JPH0813154A (en) * | 1994-06-27 | 1996-01-16 | Nippon Parkerizing Co Ltd | Zinc-containing metal plated steel sheet composite body excellent in coating suitability and its production |
| JPH0985312A (en) * | 1995-09-26 | 1997-03-31 | Mitsubishi Heavy Ind Ltd | Device for preventing thermal deformation of rolling roll |
| JPH09279373A (en) * | 1996-04-12 | 1997-10-28 | Kawasaki Steel Corp | Device for removing liquid of steel strip and method for removing liquid |
| JPH09296293A (en) * | 1996-04-30 | 1997-11-18 | Kawasaki Steel Corp | Method for preventing vibration of metallic strip in electroplating cell and vibration preventive device |
| US5795661A (en) * | 1996-07-10 | 1998-08-18 | Bethlehem Steel Corporation | Zinc coated steel sheet and strip having improved formability and surface quality and method thereof |
| JPH10310894A (en) * | 1997-05-12 | 1998-11-24 | Nkk Corp | Producing device for electrogalvanized steel sheet |
| JPH11269678A (en) * | 1998-03-20 | 1999-10-05 | Sumitomo Metal Ind Ltd | Method and apparatus for cleaning cold-rolled steel strip in continuous annealing plant |
| JP2002060960A (en) * | 2000-08-23 | 2002-02-28 | Nisshin Steel Co Ltd | Method for producing balackened galvanized steel sheet excellent in color tone stability |
| JP2002120011A (en) * | 2000-10-17 | 2002-04-23 | Nippon Steel Corp | Apparatus and method for descaling |
| JP2012250251A (en) * | 2011-06-01 | 2012-12-20 | Jfe Steel Corp | Apparatus for removing moisture on steel strip |
| KR101797368B1 (en) * | 2016-06-21 | 2017-11-13 | 현대제철 주식회사 | Manufacturing method of phosphate-treated steel sheet for mixed model production and phosphate-treated steel sheet |
-
2018
- 2018-05-25 JP JP2018100588A patent/JP6927146B2/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5446817U (en) * | 1977-09-08 | 1979-03-31 | ||
| JPS6068107A (en) * | 1983-09-24 | 1985-04-18 | Kawasaki Steel Corp | Method and device for cooling hot rolled steel sheet |
| JPS61193717A (en) * | 1985-02-20 | 1986-08-28 | Sumitomo Metal Ind Ltd | Uniform cooling method of steel plate |
| JPS6376883A (en) * | 1986-09-19 | 1988-04-07 | Nippon Parkerizing Co Ltd | Method for controlling surface regulating liquid for chemical conversion treatment of coated film by phosphate |
| JPS6428389A (en) * | 1987-07-24 | 1989-01-30 | Kawasaki Steel Co | Production of zn or zn alloy electroplated steel sheet having superior chemical treatability |
| JPH0216210U (en) * | 1988-07-15 | 1990-02-01 | ||
| JPH0247290A (en) * | 1988-08-05 | 1990-02-16 | Nisshin Steel Co Ltd | Post-treatment of electroplated steel sheet |
| JPH02101175A (en) * | 1988-08-24 | 1990-04-12 | Metallges Ag | Phosphate chemical forming treatment |
| JPH0813154A (en) * | 1994-06-27 | 1996-01-16 | Nippon Parkerizing Co Ltd | Zinc-containing metal plated steel sheet composite body excellent in coating suitability and its production |
| JPH0985312A (en) * | 1995-09-26 | 1997-03-31 | Mitsubishi Heavy Ind Ltd | Device for preventing thermal deformation of rolling roll |
| JPH09279373A (en) * | 1996-04-12 | 1997-10-28 | Kawasaki Steel Corp | Device for removing liquid of steel strip and method for removing liquid |
| JPH09296293A (en) * | 1996-04-30 | 1997-11-18 | Kawasaki Steel Corp | Method for preventing vibration of metallic strip in electroplating cell and vibration preventive device |
| US5795661A (en) * | 1996-07-10 | 1998-08-18 | Bethlehem Steel Corporation | Zinc coated steel sheet and strip having improved formability and surface quality and method thereof |
| JPH10310894A (en) * | 1997-05-12 | 1998-11-24 | Nkk Corp | Producing device for electrogalvanized steel sheet |
| JPH11269678A (en) * | 1998-03-20 | 1999-10-05 | Sumitomo Metal Ind Ltd | Method and apparatus for cleaning cold-rolled steel strip in continuous annealing plant |
| JP2002060960A (en) * | 2000-08-23 | 2002-02-28 | Nisshin Steel Co Ltd | Method for producing balackened galvanized steel sheet excellent in color tone stability |
| JP2002120011A (en) * | 2000-10-17 | 2002-04-23 | Nippon Steel Corp | Apparatus and method for descaling |
| JP2012250251A (en) * | 2011-06-01 | 2012-12-20 | Jfe Steel Corp | Apparatus for removing moisture on steel strip |
| KR101797368B1 (en) * | 2016-06-21 | 2017-11-13 | 현대제철 주식회사 | Manufacturing method of phosphate-treated steel sheet for mixed model production and phosphate-treated steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6927146B2 (en) | 2021-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101910756B1 (en) | Continuous hot-dip metal coating method, galvanized steel strip, and continuous hot-dip metal coating facility | |
| KR20150051840A (en) | HOT DIP Zn-Al-Mg ALLOY PLATED STEEL SHEET HAVING EXCELLENT FORMABILITY AND ADHESION PROPERTY AND METHOD FOR MANUFACTURING THE SAME | |
| WO1992003593A1 (en) | Method for chromate treatment of galvanized sheet iron | |
| JP2019203181A (en) | Method for producing chemically plated steel sheet | |
| CN109622339A (en) | A method of carrying out the resistance and fingerprint resistance processing of galvanized sheet on color-coating line | |
| JP6569618B2 (en) | Method for producing zinc phosphate treated steel sheet | |
| JP2904592B2 (en) | Pretreatment method for chromate treatment of zinc or zinc alloy | |
| JPH0987820A (en) | Hot dip galvanized steel sheet, and coated steel sheet using same | |
| JP3278607B2 (en) | Method for producing hot-dip galvanized steel sheet with good surface properties | |
| JP2021017604A (en) | Production method of nickel coating, and device therefor | |
| JP2008133540A (en) | Phosphate-treated galvanized steel sheet and method for producing the same | |
| JP3183630B2 (en) | Electrogalvanized steel sheet | |
| JP2864822B2 (en) | Aluminum alloy surface treatment method | |
| JP3296241B2 (en) | Chromate treatment method for galvanized steel sheet | |
| KR960011012B1 (en) | Method for producing a zero-spangle galvanized steel plate with an excellent brightness | |
| JP2005152935A (en) | Method for manufacturing hot dip galvanized steel strip, temper rolling apparatus and continuous hot dipping facility | |
| JP2002060960A (en) | Method for producing balackened galvanized steel sheet excellent in color tone stability | |
| JPS6059057A (en) | Production of steel sheet alloyed on one side to different thickness | |
| JPH09263963A (en) | Manufacture of hot-dip galvannealed steel sheet excellent in color tone stability | |
| JPS5937345B2 (en) | Molten metal plating method | |
| JP2000309881A (en) | Production of black color galvanized steel sheet excellent in hue stability | |
| JPH01177345A (en) | Method and apparatus for uniformizing concentration in plating bath | |
| JPS622632B2 (en) | ||
| JPH0353052A (en) | Alloying hot dip galvanized steel sheet excellent in powdering resistance and image clarity after coating | |
| JPS63449A (en) | Production of thinly hot dip zinc coated steel sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20190221 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20190327 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20191220 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20200911 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20201013 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20201130 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20210330 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20210611 |
|
| C60 | Trial request (containing other claim documents, opposition documents) |
Free format text: JAPANESE INTERMEDIATE CODE: C60 Effective date: 20210611 |
|
| A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20210621 |
|
| C21 | Notice of transfer of a case for reconsideration by examiners before appeal proceedings |
Free format text: JAPANESE INTERMEDIATE CODE: C21 Effective date: 20210622 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20210706 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20210719 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6927146 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |