JP2017155277A - 黒色めっき鋼板を製造する方法、黒色めっき鋼板を製造する装置および黒色めっき鋼板を製造するシステム - Google Patents
黒色めっき鋼板を製造する方法、黒色めっき鋼板を製造する装置および黒色めっき鋼板を製造するシステム Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 37
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- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 120
- 238000010438 heat treatment Methods 0.000 claims description 39
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- 150000002739 metals Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
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- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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Abstract
【解決手段】本発明は、AlおよびMgを含有する溶融Al、Mg含有Znめっき層を有するめっき鋼板を密閉容器の内部で水蒸気に接触させて黒色めっき鋼板を製造する方法に係る。本発明の方法は、密閉容器の内部に配置した前記めっき鋼板を、露点が常にめっき鋼板温度未満であるガスの存在下で加熱する第1工程と、前記加熱された密閉容器の内部の雰囲気ガスを排気して、前記密閉容器の内部の気体の圧力を70kPa以下にする第2工程と、前記内部の気体の圧力を70kPa以下にした密閉容器の内部に水蒸気を導入して前記めっき層を黒色化する第3工程とを、この順番で行う。
【選択図】図1
Description
本発明に係る黒色めっき鋼板を製造する方法(以下、単に「本発明の方法」ともいう。)は、AlおよびMgを含有する溶融Al、Mg含有Znめっき鋼板を密閉容器の内部で水蒸気に接触させて黒色めっき鋼板を製造する方法である。
第1工程(工程S110)では、密閉容器の内部に配置しためっき鋼板を低水蒸気ガスの存在下で加熱する。
第2工程(工程S120)では、密閉容器の内部の雰囲気ガスを排気して、前記密閉容器の内部の気体の圧力を70kPa以下にする。たとえば、密閉容器外に設置した排気ポンプで、密閉容器の中の雰囲気ガスを排出することで、密閉容器の内部を排気し、密閉容器の内部の気体の圧力を上記範囲にすることができる。本工程において、雰囲気ガスの排気は1回のみ行ってもよいが、密閉容器の内部に残存する水蒸気以外の気体成分の量をより少なくするため、雰囲気ガスの排気と低水蒸気ガスの導入を繰り返し行ってもよい。
第3工程(工程S130)では、密閉容器の内部に水蒸気を導入して前記めっき層を黒色化する。
第4工程(工程S140)では、密閉容器の内部の雰囲気ガスを排気して、前記密閉容器の内部の気体の圧力を70kPa以下にする。たとえば、密閉容器外に設置した排気ポンプで、密閉容器の内部の雰囲気ガスを排出することで、密閉容器の内部の雰囲気ガスを排気して圧力を低くすることができる。
第5工程(工程S150)では、密閉容器の内部に露点が常にめっき鋼板温度未満であるガスを導入して前記めっき鋼板を冷却する。本工程で導入されるガスは、加熱されていないことが好ましいが、必要に応じて、上記密閉容器の内部の雰囲気温度よりも低温に加熱されていてもよい。
上記本発明の方法によれば、水蒸気がめっき鋼板の隙間にまで十分に行きわたり、かつ、めっき鋼板の表面に結露が生じにくいので、めっき鋼板の黒色化すべき領域をより均一に黒色化することができる。
(装置の構成)
本発明に係る黒色めっき鋼板を製造する装置(以下、単に「本発明の装置」ともいう。)100は、その一例を示す模式断面図である図3に示すように、めっき鋼板1を取り外し可能に配置できる配置部を有する密閉容器10と、前記密閉容器の内部を加熱する加熱部20と、前記密閉容器の内部の雰囲気ガスを排気する排気部30と、前記密閉容器の内部に水蒸気を導入する水蒸気導入部40と、を有する。本発明の装置100は、さらに、前記密閉容器の内部にガスを導入するガス導入部50を有していてもよい。本発明の装置100は、さらに、めっき鋼板1の表面の温度を測定する温度計測部60を有していてもよい。本発明の装置100は、さらに、密閉容器10の内部の雰囲気ガスを撹拌する撹拌部70を有していてもよい。本発明の装置100は、さらに、図4に示すように、加熱部20、排気部30および水蒸気導入部40の動作を制御して、密閉容器10の配置部12に配置されためっき鋼板1を密閉容器の内部で水蒸気に接触させて、黒色めっき鋼板を製造させる、制御部80を有していてもよい。本発明の装置100がガス導入部50または撹拌部70を有しているとき、制御部80はガス導入部50の動作を制御して、上記黒色めっき鋼板を冷却させてもよいし、撹拌部70の動作を制御して、密閉容器10の内部の雰囲気ガスを撹拌してもよい。本発明の装置100が後述するドレン配管35およびドレン弁36を有しているとき、制御部80はドレン弁36の動作を制御して、装置内部から外部へ水を排出させてもよい。
以下に、図3および図4を参照して、本発明の装置100の例示的な動作と、黒色めっき鋼板を製造するシステムについて詳しく説明する。
上記本発明の装置によれば、水蒸気をめっき鋼板の隙間にまで十分に行きわたらせることができ、かつ、めっき鋼板の表面に結露を生じさせにくいので、めっき鋼板の黒色化すべき領域をより均一に黒色化することができる。
10 密閉容器
11 底部フレーム
12 配置部
13 内カバー
14 外カバー
20 加熱部
30 排気部
31 排気配管
32 排気弁
33 排気ポンプ
35 ドレン配管
36 ドレン弁
40 水蒸気導入部
41 水蒸気供給配管
42 水蒸気供給弁
43 水蒸気供給源
44 水蒸気ヒーター
50 ガス導入部
51 ガス導入配管
52 ガス導入弁
60 温度計測部
70 撹拌部
71 羽根車
72 駆動モーター
80 制御部
Claims (19)
- 基材鋼板と、基材鋼板の表面に形成された溶融Al、Mg含有Znめっき層と、を有するめっき鋼板を密閉容器の内部で水蒸気に接触させて、黒色めっき鋼板を製造する方法であって、
密閉容器の内部に配置した前記めっき鋼板を、露点が常にめっき鋼板温度未満であるガスの存在下で加熱する第1工程と、
前記加熱された密閉容器の内部の前記雰囲気ガスを排気して、前記密閉容器の内部の気体の圧力を70kPa以下にする第2工程と、
前記密閉容器の内部に水蒸気を導入して前記めっき層を黒色化する第3工程とを、
この順番で行う、黒色めっき鋼板を製造する方法。 - さらに、前記第3工程の後に、
前記めっき層を黒色化した黒色めっき鋼板が配置された密閉容器の内部の雰囲気ガスを排気して、前記密閉容器の内部の気体の圧力を70kPa以下にする第4工程と、
前記密閉容器の内部に露点が常にめっき鋼板温度未満であるガスを導入して前記めっき鋼板を冷却する第5工程とを
この順番で行う、請求項1に記載の黒色めっき鋼板を製造する方法。 - 前記めっき鋼板の形状は、コイル状である、請求項1または2に記載の黒色めっき鋼板を製造する方法。
- 前記コイル状のめっき鋼板は、アイアップで前記密閉容器の内部に配置される、請求項3に記載の黒色めっき鋼板を製造する方法。
- 2個以上の前記コイル状のめっき鋼板が、いずれもアイアップで前記密閉容器の内部に配置され、前記2個以上のめっき鋼板は、重ねて配置される、請求項3または4に記載の黒色めっき鋼板を製造する方法。
- 前記めっき鋼板は、加工されためっき鋼板である、請求項1または2に記載の黒色めっき鋼板を製造する方法。
- 前記第1工程において、前記ガスは大気である、請求項1〜6のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 前記第1工程において、前記加熱は、前記めっき層の最冷点が、水蒸気との接触によってめっき層が黒色化される温度に達するまで行う、請求項1〜7のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 前記第1工程において、前記密閉容器の内部で前記ガスを攪拌しながら前記めっき鋼板を加熱する、請求項1〜8のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 前記第3工程において、前記密閉容器の内部の雰囲気温度は105℃以上であり、前記密閉容器の内部の相対湿度は80%以上である、請求項1〜9のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 前記第3工程において、前記密閉容器の内部を加熱する、請求項1〜10のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 前記第3工程において、前記密閉容器の内部に水蒸気を導入した後に、前記密閉容器の内部から一定量の雰囲気ガスを排出し、かつ、前記密閉容器に水蒸気をさらに導入する、請求項1〜11のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 前記第3工程において、前記密閉容器の内部に水蒸気を導入した後に、前記密閉容器の内部の雰囲気ガスを撹拌する、請求項1〜12のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 前記溶融Al、Mg含有Znめっき層は、Alを0.1質量%以上60質量%以下の量で含有し、Mgを0.01質量%以上10質量%以下の量で含有する、請求項1〜13のいずれか1項に記載の黒色めっき鋼板を製造する方法。
- 基材鋼板と、基材鋼板の表面に形成された溶融Al、Mg含有Znめっき層と、を有するめっき鋼板を配置可能な配置部を有する密閉容器と、
前記密閉容器の内部を加熱する加熱部と、
前記密閉容器の内部の雰囲気ガスを排気して、前記密閉容器の内部の気体の圧力を70kPa以下にする排気部と、
前記密閉容器の内部に水蒸気を導入する水蒸気導入部と、
を有する、黒色めっき鋼板を製造する装置。 - さらに攪拌部を有する、請求項15に記載の黒色めっき鋼板を製造する装置。
- 請求項15または16に記載の黒色めっき鋼板を製造する装置と、
前記加熱部、前記排気部および前記水蒸気導入部の動作を制御して、前記密閉容器の前記配置部に配置されためっき鋼板を前記密閉容器の内部で水蒸気に接触させて、黒色めっき鋼板を製造させる制御部とを有する、
黒色めっき鋼板を製造するシステム。 - 前記制御部は、前記攪拌部の動作を制御して、前記密閉容器の内部の雰囲気ガスを撹拌させる、請求項17に記載の黒色めっき鋼板を製造するシステム。
- 前記溶融Al、Mg含有Znめっき層は、Alを0.1質量%以上60質量%以下の量で含有し、Mgを0.01質量%以上10質量%以下の量で含有する、請求項17または18に記載の黒色めっき鋼板を製造するシステム。
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