JP4175285B2 - 被膜形成方法 - Google Patents
被膜形成方法 Download PDFInfo
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- JP4175285B2 JP4175285B2 JP2004119243A JP2004119243A JP4175285B2 JP 4175285 B2 JP4175285 B2 JP 4175285B2 JP 2004119243 A JP2004119243 A JP 2004119243A JP 2004119243 A JP2004119243 A JP 2004119243A JP 4175285 B2 JP4175285 B2 JP 4175285B2
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- Prior art keywords
- furnace
- pipe
- heat treatment
- gas
- tube
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
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- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 description 22
- 238000010828 elution Methods 0.000 description 21
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- 238000000576 coating method Methods 0.000 description 20
- 239000011651 chromium Substances 0.000 description 19
- 238000005482 strain hardening Methods 0.000 description 19
- 229910001220 stainless steel Inorganic materials 0.000 description 18
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- 239000003921 oil Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 229910052801 chlorine Inorganic materials 0.000 description 9
- 229910052804 chromium Inorganic materials 0.000 description 9
- 238000011109 contamination Methods 0.000 description 9
- 229910021645 metal ion Inorganic materials 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 230000003746 surface roughness Effects 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 239000002585 base Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
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- 238000005406 washing Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
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- 238000010248 power generation Methods 0.000 description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical compound [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
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- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 150000002431 hydrogen Chemical group 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010731 rolling oil Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000005069 Extreme pressure additive Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- BIJOYKCOMBZXAE-UHFFFAOYSA-N chromium iron nickel Chemical compound [Cr].[Fe].[Ni] BIJOYKCOMBZXAE-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Description
『冷間加工した金属管に酸化被膜を形成する被膜形成方法であって、脱脂した後、炉入口から加熱帯の被熱処理管が最高温度となる位置までの炉内圧力が2段階以上で順次高くなり、被熱処理管が加熱されて500℃となる管進行方向位置での炉内圧力が、炉外圧よりも高く、かつ炉内最大圧力よりも低い圧力となる連続熱処理炉を用い、露点を−50℃から+50℃の範囲内に調節した非酸化性ガスを連続熱処理炉内に導入して、酸化被膜を形成することを特徴とする被膜形成方法。』
前記被膜形成方法において、油潤滑処理を行って冷間加工し、アルカリに浸漬し温水で洗浄することにより脱脂した後、熱処理し酸化被膜を形成することとすれば、酸洗による脱脂の必要がなく、腐食により粗さが劣化せず、欠陥がなく薄くて密着した被膜が得られ、望ましい。
〔表面粗さ〕
管の内面3箇所の表面粗さを中心線平均粗さRa(μm)で表示し、その平均値が0.5μm以下であれば「◎印(極めて良好)」、0.5μm超え1μm以下であれば「○印(良好)」、1μm超えであれば「×印(不良)」とした。
管内に非脱気純水を封入し、215℃で100時間保持した後、封入水中のFe、CrおよびNiの量を誘導結合プラズマ発光分光分析装置(ICP−MS)で定量し、封入水量と管内の表面積から単位表面積当たり溶出量(mg/m2)を算出した。
被膜処理(熱処理)後の管について、炉幅方向3箇所(管の直径方向両端および中央)と長さ方向3箇所(管の先端、中央および後端)の計9箇所からサンプリングし、内外表面の色を目視にて観察した。
管内に純水を封入し、内面の付着物を溶出させた後、封入水中のClイオン、SO4イオンの濃度をイオンクロマトグラフィーにより求め、封入水量と管内の表面積から単位表面積当たりの塩化物量(mg/m2)、および硫化物量(mg/m2)を算出した。塩化物および硫化物の合計量が1mg/m2以下であれば「○印」、1mg/m2超えであれば「×印」とした。
2:加熱帯
3:冷却帯
4:出口帯
5a、5a′、5b、5c、5d:シールカーテン
6a、6b、6c、6d、6e:金属管
7:予熱器
8:円筒型加熱炉
9:ステンレス鋼管
Claims (4)
- 冷間加工した金属管に酸化被膜を形成する被膜形成方法であって、脱脂した後、炉入口から加熱帯の被熱処理管が最高温度となる位置までの炉内圧力が2段階以上で順次高くなり、被熱処理管が加熱されて500℃となる管進行方向位置での炉内圧力が、炉外圧よりも高く、かつ炉内最大圧力よりも低い圧力となる連続熱処理炉を用い、露点を−50℃から+50℃の範囲内に調節した非酸化性ガスを連続熱処理炉内に導入して、酸化被膜を形成することを特徴とする被膜形成方法。
- 油潤滑処理を行って冷間加工し、アルカリに浸漬し温水で洗浄することにより脱脂した後、熱処理し酸化被膜を形成することを特徴とする請求項1に記載の被膜形成方法。
- 非酸化性ガスが水素であることを特徴とする請求項1または2に記載の被膜形成方法。
- 非酸化性ガスが水素を主成分とし、窒素、ヘリウム、アルゴンのうち少なくとも1種を含有することを特徴とする請求項3に記載の被膜形成方法。
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JP2004119243A JP4175285B2 (ja) | 2004-04-14 | 2004-04-14 | 被膜形成方法 |
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JP2004119243A JP4175285B2 (ja) | 2004-04-14 | 2004-04-14 | 被膜形成方法 |
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JP2005298934A JP2005298934A (ja) | 2005-10-27 |
JP4175285B2 true JP4175285B2 (ja) | 2008-11-05 |
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JP2004119243A Expired - Lifetime JP4175285B2 (ja) | 2004-04-14 | 2004-04-14 | 被膜形成方法 |
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Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN116970896B (zh) * | 2023-09-22 | 2024-02-02 | 成都先进金属材料产业技术研究院股份有限公司 | 一种提高Ni-Cr电热合金产品预氧化效果的方法 |
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