JP4672267B2 - 窒化処理方法及びそれに用いる窒化処理装置 - Google Patents
窒化処理方法及びそれに用いる窒化処理装置 Download PDFInfo
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- JP4672267B2 JP4672267B2 JP2004027471A JP2004027471A JP4672267B2 JP 4672267 B2 JP4672267 B2 JP 4672267B2 JP 2004027471 A JP2004027471 A JP 2004027471A JP 2004027471 A JP2004027471 A JP 2004027471A JP 4672267 B2 JP4672267 B2 JP 4672267B2
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- Prior art keywords
- nitriding
- chamber
- oxygen concentration
- oxygen
- gas
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- 238000005121 nitriding Methods 0.000 title claims description 153
- 238000000034 method Methods 0.000 title claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 90
- 239000001301 oxygen Substances 0.000 claims description 90
- 229910052760 oxygen Inorganic materials 0.000 claims description 90
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 68
- 239000007789 gas Substances 0.000 claims description 46
- 239000012298 atmosphere Substances 0.000 claims description 41
- 229910021529 ammonia Inorganic materials 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 7
- 229910001882 dioxygen Inorganic materials 0.000 claims description 7
- 150000004767 nitrides Chemical class 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 79
- 239000002184 metal Substances 0.000 description 46
- 229910052751 metal Inorganic materials 0.000 description 46
- 229910052757 nitrogen Inorganic materials 0.000 description 29
- 229910001873 dinitrogen Inorganic materials 0.000 description 21
- 150000004820 halides Chemical class 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 9
- 229910001240 Maraging steel Inorganic materials 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000003483 aging Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Description
Claims (3)
- 窒化処理装置が第1置換室、予熱室、窒化処理室、冷却室、及び第2置換室を含み、該窒化処理室で連続して窒化処理を行う場合に、該窒化処理室内に、少なくともアンモニアと酸素とを所定の濃度で含む雰囲気を導入し、鋼材を該雰囲気下、所定の処理温度範囲に所定の処理時間保持して窒化処理する窒化処理方法において、
該窒化処理室内に、少なくともアンモニアと酸素とを所定の濃度で含む雰囲気を導入する工程と、
該窒化処理室内を所定の温度範囲に加熱する工程と、
該窒化処理室内の酸素濃度を測定する工程と、
測定された酸素濃度に基づいて該窒化処理室内の酸素濃度を調整する工程とを備えることを特徴とする窒化処理方法。 - 前記窒化処理室内の酸素濃度の調整は、予め求められた鋼材の表面硬度と該窒化処理室内の酸素濃度との関係に基づいて、所定の表面硬度を得るために必要な該窒化処理室内の酸素濃度の範囲を設定し、
測定された酸素濃度が設定された酸素濃度の範囲より大きければ該窒化処理室内に導入される酸素の量を低減し、
測定された酸素濃度が設定された酸素濃度の範囲より小さければ該窒化処理室内に導入される酸素の量を増加することにより行うことを特徴とする請求項1記載の窒化処理方法。 - 第1置換室、予熱室、窒化処理室、冷却室、及び第2置換室を含み、該窒化処理室で連続して窒化処理を行う場合に、鋼材を、該窒化処理室内にて少なくともアンモニアと酸素とを所定の濃度で含む雰囲気下、所定の温度範囲に所定時間保持して窒化処理する窒化処理装置において、
該窒化処理室内を加熱して所定の処理温度範囲に保持する加熱手段と、アンモニアガスを該窒化処理室内に導入するアンモニアガス導入手段と、酸素ガスを該窒化処理室内に導入する酸素ガス導入手段と、該窒化処理室内の酸素濃度を検出する酸素濃度検出手段と、該酸素濃度測定手段により検出された酸素濃度に基づいて該窒化処理室内の酸素濃度を調整する酸素濃度調整手段とを備えることを特徴とする窒化処理装置。
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JP2005220386A JP2005220386A (ja) | 2005-08-18 |
JP4672267B2 true JP4672267B2 (ja) | 2011-04-20 |
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DE102014116929B3 (de) | 2014-11-19 | 2015-11-05 | Thyssenkrupp Ag | Verfahren zur Herstellung eines aufgestickten Verpackungsstahls, kaltgewalztes Stahlflachprodukt und Vorrichtung zum rekristallisierenden Glühen und Aufsticken eines Stahlflachprodukts |
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