JP5796142B2 - 鋼板材の溶融めっき法 - Google Patents
鋼板材の溶融めっき法 Download PDFInfo
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- JP5796142B2 JP5796142B2 JP2014555957A JP2014555957A JP5796142B2 JP 5796142 B2 JP5796142 B2 JP 5796142B2 JP 2014555957 A JP2014555957 A JP 2014555957A JP 2014555957 A JP2014555957 A JP 2014555957A JP 5796142 B2 JP5796142 B2 JP 5796142B2
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- 229910000831 Steel Inorganic materials 0.000 title claims description 140
- 239000010959 steel Substances 0.000 title claims description 140
- 238000007598 dipping method Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims description 77
- 239000000463 material Substances 0.000 claims description 71
- 238000007747 plating Methods 0.000 claims description 59
- 238000010438 heat treatment Methods 0.000 claims description 33
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 18
- 239000012535 impurity Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- 101100492805 Caenorhabditis elegans atm-1 gene Proteins 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 7
- 238000005097 cold rolling Methods 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 28
- 229910052782 aluminium Inorganic materials 0.000 description 12
- 230000003647 oxidation Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 10
- 239000011701 zinc Substances 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 229910052748 manganese Inorganic materials 0.000 description 8
- 229910000990 Ni alloy Inorganic materials 0.000 description 7
- 238000000137 annealing Methods 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 6
- 229910000599 Cr alloy Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 239000010953 base metal Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910016943 AlZn Inorganic materials 0.000 description 1
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000006388 chemical passivation reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005244 galvannealing Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C21D8/0226—Hot rolling
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
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Description
a) 鋼板材を用意する工程
b) 鋼板材を保持温度まで加熱する工程、
c) 鋼板材を保持温度で保持し、再結晶させる工程
d) 鋼板材をストリップ入口温度まで冷却する工程、および
e) 鋼板材を入口帯を通して溶融浴に送る工程
を含む。
a) 少なくとも2.0重量%のNiおよび少なくとも5.0重量%のCrを含む鋼から製造され、冷間圧延または熱間圧延により得られた鋼板材を用意する工程;
b) 1〜30秒以内、鋼板材を保持温度700〜1100℃に加熱する工程であって、加熱は、−15℃〜+30℃に設定された露点TP1を有し、かつN2および技術的に不可避な不純物のほか、任意に以下の構成成分(体積%単位):H2:1〜50%、CO:0.1〜2.0%、CO2:5.0〜15.0%の1つまたは複数を含む加熱雰囲気下で行われる工程;
c) 加熱された鋼板材を、N2および技術的に不可避な不純物ならびに1.0〜50.0体積%のH2および最大1.0体積%のO2からなり、かつその露点TP2が−30℃〜0℃に設定された保持雰囲気下、10〜120秒の保持時間保持温度で保持する工程;
d) 鋼板材を保持温度から430〜800℃になるストリップ入口温度に冷却する工程;
e) 鋼板材を、鋼板材が溶融浴への進入まで不活性または還元性入口雰囲気下で保持される入口帯を通過させ、その後鋼板材が金属被膜により溶融めっきされる溶融浴を通過させる工程;
を提供し、
加熱雰囲気の露点TP1は保持雰囲気の露点TP2より高く、露点TP2は入口雰囲気の露点TP4より高い。言い換えれば:TP1>TP2>TP4である。
TP1>TP2>TP4
に従い、あるいは過時効処理を行う場合には、
TP1>TP2>TP3≧TP4
に従い設定することにより、それぞれの加熱雰囲気(露点TP1)、保持雰囲気(露点TP2)、任意に存在する過時効雰囲気(露点TP3)および入口雰囲気(露点TP4)の酸化力は、いずれの場合もそれぞれのプロセス工程において存在する鋼ストリップ温度に最適に適合される。加熱中に維持される加熱雰囲気を高い露点TP1にすると、卑金属合金元素の内部酸化物の最初の形成が増加する。その後の高い保持温度での保持においては、鋼表面上で最適な還元結果を達成し、FeおよびNiの酸化を防止するため、露点TP2を下げることにより保持雰囲気の酸化力を低下させる。
2 通路炉1の炉帯(加熱ゾーン)
3 通路炉1の炉帯(保持ゾーン)
4 通路炉1の炉帯(冷却ゾーン)
5 通路炉1の炉帯(過時効ゾーン)
6 通路炉1の炉帯(入口)
7 溶融浴釜
A 溶融めっきプラント
B 溶融浴
F 進行方向
G ガス流
S 鋼板材(冷間圧延、圧延硬化ストリップ鋼)
Claims (14)
- 金属保護めっきによる鋼板材(S)の溶融めっき法であって、
a) 少なくとも2.0重量%のNiおよび少なくとも5.0重量%のCrを含む鋼から製造され、冷間圧延または熱間圧延により得られた鋼板材(S)を用意する工程;
b) 1〜30秒以内、前記鋼板材(S)を保持温度700〜1100℃に加熱する工程であって、加熱は、−15℃〜+30℃に設定された露点TP1を有し、かつN2および技術的に不可避な不純物のほか、任意に以下の構成成分(体積%単位):
H2 : 1〜50%、
CO : 0.1〜2.0%、
CO2: 5.0〜15.0%;
の1つまたは複数を含む加熱雰囲気(Atm1)下で行われる工程;
c) 前記加熱された鋼板材(S)を、N2および技術的に不可避な不純物ならびに1.0〜50.0体積%のH2および最大1.0体積%のO2からなり、かつ露点TP2が−30℃〜0℃に設定される保持雰囲気下(Atm2)、10〜120秒の保持時間、前記保持温度で保持する工程;
d) 前記鋼板材(S)を前記保持温度から430〜800℃であるストリップ入口温度に冷却する工程;
e) 前記鋼板材(S)を、前記鋼板材(S)が溶融浴(B)への進入まで不活性または還元性入口雰囲気(Atm4)下で保持される入口帯(6)を通過させ、その後前記鋼板材(S)が前記金属めっきにより溶融めっきされる溶融浴(B)を通過させる工程;
を含み、
前記加熱雰囲気(Atm1)の前記露点TP1は前記保持雰囲気(Atm2)の前記露点TP2より高く、前記露点TP2は前記入口雰囲気(Atm4)の露点TP4より高い
方法。 - 保持温度は700〜850℃であることを特徴とする、請求項1に記載の方法。
- 前記加熱雰囲気(Atm1)は1.0〜5.0体積%のH2を含むことを特徴とする、請求項1または2に記載の方法。
- 前記加熱は直接加熱される炉帯で行われ、前記加熱雰囲気(Atm1)は、N2およびH2のほか、0.1〜2.0体積%のCOおよび5.0〜15.0体積%のCO2を含むことを特徴とする、請求項1〜3の何れか1項に記載の方法。
- 前記保持雰囲気(Atm2)の前記H2含有量は1.0〜5.0体積%であることを特徴とする、請求項1〜4の何れか1項に記載の方法。
- 前記保持雰囲気(Atm2)の前記露点TP2は−30℃〜−10℃であることを特徴とする、請求項1〜5の何れか1項に記載の方法。
- 前記保持雰囲気(Atm2)の前記O2含有量は最大0.1体積%であることを特徴とする、請求項1〜6の何れか1項に記載の方法。
- 前記ストリップ入口温度への冷却(プロセス工程d))後、前記鋼板材(S)はプロセス工程d’)として、前記鋼板材(S)が過時効雰囲気(Atm3)下、前記ストリップ入口温度で1〜30秒間保持される過時効処理を受ける工程であって、前記過時効雰囲気(Atm3)はN2および技術的に不可避な不純物のほか、任意に1〜50体積%のH2を含み、かつ前記過時効雰囲気(Atm3)の露点TP3は−50℃〜−25℃に設定されること特徴とする、請求項1〜7の何れか1項に記載の方法。
- 前記過時効雰囲気(Atm3)の前記H2含有量は1.0〜5.0体積%であることを特徴とする、請求項8に記載の方法。
- 前記露点TP1、TP2、TP3およびTP4に対し、以下の条件:
TP1>TP2>TP3≧TP4
を適用することを特徴とする、請求項8または9に記載の方法。 - 前記入口雰囲気(Atm4)はN2および技術的に不可避な不純物ならびに任意に1.0〜50.0体積%のH2からなり、その露点TP4は−80℃〜−25℃であることを特徴とする、請求項1〜10の何れか1項に記載の方法。
- 前記鋼板材(S)は前記溶融浴(B)を1〜10秒以内で通板することを特徴とする、請求項1〜11の何れか1項に記載の方法。
- 前記加熱雰囲気(Atm1)、前記保持雰囲気(Atm2)、前記過時効雰囲気(Atm3)または前記入口雰囲気(Atm4)の前記露点の前記設定は、いずれの場合も任意に湿った媒体の添加により行われることを特徴とする、請求項1〜12の何れか1項に記載の方法。
- 前記鋼板材(S)が製造される前記鋼は鉄および不可避な不純物のほか(重量%):
Cr: 5.0〜30.0%
Ni: 2.0〜30.0%
Mn: ≦6.0%
Mo: ≦5.0%
Si: ≦2.0%
Cu: ≦2.0%
Ti: ≦1.0%
Nb: ≦1.0%
V: ≦0.5%
N: ≦0.2%
Al: ≦2.0%
C: ≦0.5%
を含むことを特徴とする、請求項1〜13の何れか1項に記載の方法。
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DE102014109943B3 (de) | 2014-07-16 | 2015-11-05 | Thyssenkrupp Ag | Stahlprodukt mit einer Korrosionsschutzbeschichtung aus einer Aluminiumlegierung sowie Verfahren zu dessen Herstellung |
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