JP6565842B2 - フェライト系ステンレス鋼製品の製造方法 - Google Patents
フェライト系ステンレス鋼製品の製造方法 Download PDFInfo
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- JP6565842B2 JP6565842B2 JP2016177568A JP2016177568A JP6565842B2 JP 6565842 B2 JP6565842 B2 JP 6565842B2 JP 2016177568 A JP2016177568 A JP 2016177568A JP 2016177568 A JP2016177568 A JP 2016177568A JP 6565842 B2 JP6565842 B2 JP 6565842B2
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
-
- C—CHEMISTRY; METALLURGY
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
-
- C—CHEMISTRY; METALLURGY
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- C—CHEMISTRY; METALLURGY
- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
- C23C8/38—Treatment of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
-
- C—CHEMISTRY; METALLURGY
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
上記浸炭工程後に、N2ガスを含む雰囲気中で上記フェライト系ステンレス鋼の変態点以上の温度で上記被処理品を加熱することにより上記被処理品の表面に窒化層(3)を形成する窒化工程と、を有しており、
上記浸炭層の形成前の上記被処理品の炭素濃度A質量%と、上記浸炭工程後かつ上記窒化工程前における上記浸炭層の表面炭素濃度X C 質量%及び上記浸炭層の厚さL C mmと、上記窒化工程後の上記浸炭層の厚さL N mmとが、(X C −A)×L C ≦(0.3−A)×L N の関係を満足する、フェライト系ステンレス鋼製品(1)の製造方法にある。
フェライト系ステンレス鋼製品の製造方法の実施形態について、図面を参照して説明する。フェライト系ステンレス鋼製品の製造にあたっては、以下の浸炭工程と窒化工程とを行う。
本実施形態においては、図3に例示される加熱炉4を用いて浸炭工程及び窒化工程を行うことにより、円盤状のフェライト系ステンレス鋼製品1を製造する例である。なお、実施形態2以降において用いた符号のうち、既出の実施形態において用いた符号と同一のものは、特に示さない限り、既出の実施形態におけるものと同様の構成要素等を表す。
本例においては、浸炭工程後に窒化工程を行って作製したフェライト系ステンレス鋼製品(すなわち、実施例品)と、浸炭工程を行うことなく、窒化工程を行って作製したフェライト系ステンレス鋼製品(すなわち、比較例品)の耐食性と硬さの評価を行う。実施例品は、上述の実施形態2と同様にして作製したフェライト系ステンレス鋼製品である。比較例品は、アセチレンガスを導入しなかった点を除いては、上述の実施形態2と同様にして作製したフェライト系ステンレス鋼製品である。
JIS Z2371:2000に準拠して中性塩水噴霧試験を行い、実施例品及び比較例品の耐食性を評価した。塩水の噴霧は連続で行った。試験後、表面の変色の有無を目視にて観察した。実施例品の結果を図4(a)に示し、比較例品の結果を図4(b)に示す。
(1)断面組織観察
円盤状の実施例品及び比較例品を直径方向に二等分するように切断し、その断面組織を倍率100倍の光学顕微鏡にて観察した。実施例品の断面組織写真を図5(a)に示し、比較例品の断面組織写真を図5(b)に示す。なお、図5(a)における矢印は、マルテンサイト相が表面から所定の深さにおける全域に形成された領域を示す。
実施例品及び比較例品の表面からの距離Lとビッカース硬さHv0.1との関係を調べた。ビッカース硬さHvの測定にあたっては、まず、図6(a)に例示される、実施例品の円盤状のフェライト系ステンレス鋼製品1を直径方向に二等分するように切断し、図6(b)に例示される半円盤状の試験片10を得た。その後、図示を省略する樹脂に試験片10を埋込み、切断面101を研磨した後、切断面101のビッカース硬さを測定した。測定は、板厚方向における試験片の表面から内部に向かう向き、すなわち、図6(b)の矢印Aの向きに所定の距離毎に行った。比較例品の測定方法も同様である。実施例品の距離Lとビッカース硬さHv0.1との関係を図7に示し、比較例品の距離Lとビッカース硬さHv0.1との関係を図8に示す。なお、Hv0.1とは、JIS Z 2244:2009に準拠して規定され、圧痕による測定荷重を0.1kgf、すなわち0.98Nに設定した場合のビッカース硬さを示す。
本例においては、浸炭層の形成前の被処理品の炭素濃度A質量%と、浸炭工程後かつ窒化工程前における浸炭層の表面炭素濃度XC質量%と、浸炭工程後かつ窒化工程前における浸炭層の厚さLCmmと、窒化工程後の浸炭層の厚さLNmmとの好ましい関係を調べる。
測定装置:株式会社島津製作所製のEPMA−1610
ACC.V:15kV
ビーム径:3μm
ビーム電流:200nA
サンプリングピッチ:3μm
データポイント:400
サンプリング時間:1秒
また、図11に例示されるように、浸炭工程後の被処理品における炭素濃度分布曲線において、炭素濃度が最表面の1/3となる基準点Pにおける接線Tpと素材炭素濃度Aとの交点までの距離を、浸炭工程後かつ窒化工程前における浸炭層の厚さLcとした。
また、被処理品の素材炭素濃度Aは、上述の浸炭工程や窒化工程を行う前の被処理品のフェライト系ステンレス鋼素材本来の炭素濃度である。
2 被処理品
21 浸炭層
3 窒化層
Claims (5)
- フェライト系ステンレス鋼製の被処理品(2)に浸炭層(21)を形成する浸炭工程と、
上記浸炭工程後に、N2ガスを含む雰囲気中で上記フェライト系ステンレス鋼の変態点以上の温度で上記被処理品を加熱することにより上記被処理品の表面に窒化層(3)を形成する窒化工程と、を有しており、
上記浸炭層の形成前の上記被処理品の炭素濃度A質量%と、上記浸炭工程後かつ上記窒化工程前における上記浸炭層の表面炭素濃度X C 質量%及び上記浸炭層の厚さL C mmと、上記窒化工程後の上記浸炭層の厚さL N mmとが、(X C −A)×L C ≦(0.3−A)×L N の関係を満足する、フェライト系ステンレス鋼製品(1)の製造方法。 - 上記窒化層を有する上記被処理品の焼き入れを行う冷却工程を有する、請求項1に記載のフェライト系ステンレス鋼製品(1)の製造方法。
- 上記浸炭層の形成前の上記被処理品の炭素濃度A質量%と、上記浸炭工程後かつ上記窒化工程前における上記浸炭層の表面炭素濃度XC質量%及び上記浸炭層の厚さLCmmと、上記窒化工程後の上記浸炭層の厚さLNmmとが、(0.2−A)×LN≦(XC−A)×LCの関係を満足する、請求項1または2に記載のフェライト系ステンレス鋼製品の製造方法。
- 上記浸炭工程においては、上記被処理品を内部に配置した減圧条件下の加熱炉内を浸炭温度まで加熱し、上記加熱炉内に浸炭ガスを供給することにより、上記浸炭層を形成する、請求項1〜3のいずれか1項に記載のフェライト系ステンレス鋼製品の製造方法。
- 上記浸炭ガスは、不飽和炭化水素ガスを少なくとも含有する、請求項4に記載のフェライト系ステンレス鋼製品の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2016177568A JP6565842B2 (ja) | 2016-09-12 | 2016-09-12 | フェライト系ステンレス鋼製品の製造方法 |
DE112017004574.6T DE112017004574T5 (de) | 2016-09-12 | 2017-09-08 | Verfahren zur Herstellung eines ferritischen Edelstahlprodukts |
CN201780054974.XA CN109689918B (zh) | 2016-09-12 | 2017-09-08 | 铁素体系不锈钢制品的制造方法 |
PCT/JP2017/032412 WO2018047934A1 (ja) | 2016-09-12 | 2017-09-08 | フェライト系ステンレス鋼製品の製造方法 |
US16/294,016 US10508331B2 (en) | 2016-09-12 | 2019-03-06 | Method for manufacturing ferritic stainless steel product |
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JP2016177568A JP6565842B2 (ja) | 2016-09-12 | 2016-09-12 | フェライト系ステンレス鋼製品の製造方法 |
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JP2018044187A5 JP2018044187A5 (ja) | 2018-10-11 |
JP6565842B2 true JP6565842B2 (ja) | 2019-08-28 |
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JP (1) | JP6565842B2 (ja) |
CN (1) | CN109689918B (ja) |
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WO (1) | WO2018047934A1 (ja) |
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JPS59107028A (ja) * | 1982-12-13 | 1984-06-21 | Nisshin Steel Co Ltd | 高炭素ステンレス鋼帯の製造方法 |
JP3442737B2 (ja) | 2000-12-11 | 2003-09-02 | 中外炉工業株式会社 | Cr及び/又はMn含有鋼材部品の真空浸炭方法 |
JP4523736B2 (ja) * | 2001-04-20 | 2010-08-11 | 大豊工業株式会社 | 鉄系摺動部材 |
EP1454998B1 (en) * | 2001-12-13 | 2010-02-10 | Koyo Thermo Systems Co., Ltd. | Vacuum carbo-nitriding method |
JP4378773B2 (ja) | 2005-05-16 | 2009-12-09 | 独立行政法人物質・材料研究機構 | ステンレス鋼製製品の製造方法とそのステンレス鋼製製品 |
JP5835256B2 (ja) | 2013-03-21 | 2015-12-24 | 株式会社デンソー | フェライト系ステンレス鋼製品の製造方法 |
JP2015067876A (ja) | 2013-09-30 | 2015-04-13 | トヨタ自動車株式会社 | 排気系部品の製造方法 |
JP6536881B2 (ja) | 2015-03-20 | 2019-07-03 | カシオ計算機株式会社 | 表示装置及び情報表示方法、情報表示プログラム |
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DE112017004574T5 (de) | 2019-06-13 |
JP2018044187A (ja) | 2018-03-22 |
CN109689918A (zh) | 2019-04-26 |
US20190203331A1 (en) | 2019-07-04 |
CN109689918B (zh) | 2021-04-02 |
WO2018047934A1 (ja) | 2018-03-15 |
US10508331B2 (en) | 2019-12-17 |
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