JP4956417B2 - 雰囲気熱処理装置及びその運転方法 - Google Patents
雰囲気熱処理装置及びその運転方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 18
- 238000010438 heat treatment Methods 0.000 title description 39
- 238000005255 carburizing Methods 0.000 claims description 171
- 239000007789 gas Substances 0.000 claims description 95
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 34
- 229910052760 oxygen Inorganic materials 0.000 claims description 34
- 239000001301 oxygen Substances 0.000 claims description 34
- 238000010791 quenching Methods 0.000 claims description 32
- 238000002485 combustion reaction Methods 0.000 claims description 19
- 230000000171 quenching effect Effects 0.000 description 29
- 238000009792 diffusion process Methods 0.000 description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 12
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000007670 refining Methods 0.000 description 4
- 238000005256 carbonitriding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000005121 nitriding Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/0016—Chamber type furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Materials 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
また,本発明によれば,変成ガスが供給される浸炭室の入口側から内部雰囲気を排気する入口側排気路と,出口側から排気する出口側排気路を設け,前記入口側排気路の開度を調整する開度調整蓋を装着し,前記出口側排気路の一部もしくは全部を,所定の内径を有するパイプで構成した連続ガス浸炭装置であって,前記浸炭室の入口側に,前記浸炭室にワークを搬入する搬入室を設け,この搬入室に前記入口側排気路を設け,前記浸炭室の出口側に,ワークを油焼き入れする油槽室を設け,この油槽室に,外気を取り入れる外気取入れ路を設け,前記外気取り入れ路を開閉させる開閉機構を備え,前記出口側排気路を前記開閉機構に取り付け,前記出口側排気路の入口端を,前記開閉機構と前記外気取入れ路の出口端との間に設け,前記外気取入れ路から取り入れられる外気中の酸素を燃焼に消費させるバーナを設け,前記開閉機構を前記バーナと前記外気取入れ路の出口端との間に備え,前記出口側排気路の出口端を,前記バーナと前記開閉機構との間に設けたことを特徴とする,連続ガス浸炭装置が提供される。
1 連続ガス浸炭装置
10 浸炭室
11 搬入室
12 油槽室
15 予熱ゾーン
16 浸炭ゾーン
17 拡散ゾーン
18 焼き入れ加熱ゾーン
25 給気路
26 入口側排気路
28 開度調整蓋
35 外気取入れ路
36 出口側排気路
40 蓋
41 バーナ
46 円筒パイプ
50 パイロットバーナ
62 開閉機構
出口側排気路36の出口端である開口36bを外気取入れ路35に接続せず,外気に開放させた構成とし,その他の点については上記連続ガス浸炭装置1とほぼ同様の構成を有する連続ガス浸炭装置において,ワークの浸炭処理を実施した。その結果,油槽室12内の酸素濃度は,約1.5%〜1.8%であり,上記実施例1と比較して高い濃度であった。浸炭処理後のワークには,全体的に黒い変色がみられた。
Claims (5)
- 変成ガスが供給される浸炭室の入口側から内部雰囲気を排気する入口側排気路と,出口側から排気する出口側排気路を設け,
前記入口側排気路の開度を調整する開度調整蓋を装着し,
前記出口側排気路の一部もしくは全部を,所定の内径を有するパイプで構成した連続ガス浸炭装置であって,
前記浸炭室の入口側に,前記浸炭室にワークを搬入する搬入室を設け,この搬入室に前記入口側排気路を設け,
前記浸炭室の出口側に,ワークを油焼き入れする油槽室を設け,この油槽室に,外気を取り入れる外気取入れ路を設け,前記外気取り入れ路を開閉させる開閉機構を備え,
前記出口側排気路の入口端を,前記開閉機構と前記外気取入れ路の出口端との間において,前記外気取り入れ路に接続し,
前記外気取入れ路から取り入れられる外気中の酸素を燃焼に消費させるバーナを設け,
前記開閉機構を前記バーナと前記外気取入れ路の出口端との間に備え,
前記出口側排気路の出口端を,前記バーナと前記開閉機構との間において,前記外気取り入れ路に接続したことを特徴とする,連続ガス浸炭装置。 - 変成ガスが供給される浸炭室の入口側から内部雰囲気を排気する入口側排気路と,出口側から排気する出口側排気路を設け,
前記入口側排気路の開度を調整する開度調整蓋を装着し,
前記出口側排気路の一部もしくは全部を,所定の内径を有するパイプで構成した連続ガス浸炭装置であって,
前記浸炭室の入口側に,前記浸炭室にワークを搬入する搬入室を設け,この搬入室に前記入口側排気路を設け,
前記浸炭室の出口側に,ワークを油焼き入れする油槽室を設け,この油槽室に,外気を取り入れる外気取入れ路を設け,前記外気取り入れ路を開閉させる開閉機構を備え,
前記出口側排気路を前記開閉機構に取り付け,
前記出口側排気路の入口端を,前記開閉機構と前記外気取入れ路の出口端との間に設け,
前記外気取入れ路から取り入れられる外気中の酸素を燃焼に消費させるバーナを設け,
前記開閉機構を前記バーナと前記外気取入れ路の出口端との間に備え,
前記出口側排気路の出口端を,前記バーナと前記開閉機構との間に設けたことを特徴とする,連続ガス浸炭装置。 - 変成ガスが供給される浸炭室の入口側から内部雰囲気を排気する入口側排気路と,出口側から排気する出口側排気路を設け,
前記入口側排気路の開度を調整する開度調整蓋を装着し,
前記出口側排気路の一部もしくは全部を,所定の内径を有するパイプで構成した連続ガス浸炭装置を運転する方法であって,
前記浸炭室の入口側に,前記浸炭室にワークを搬入する搬入室を設け,この搬入室に前記入口側排気路を設け,
前記浸炭室の出口側に,ワークを油焼き入れする油槽室を設け,この油槽室に前記出口側排気路を設け,
前記開度調整蓋によって前記入口側排気路の開度を調整することにより,前記浸炭室内の圧力を所望の炉圧に調整した際の,変成ガスの供給量Aに対する,前記出口側排気路からの排気量Bと前記入口側排気路からの排気量Cとの比B:Cの関係を予め調べておき,
ワークを処理する際には,前記変成ガスの供給量Aと炉圧を調整して,前記出口側排気路からの排気量Bと前記入口側排気路からの排気量Cとの比B:Cを所望の範囲に制御することを特徴とする,連続ガス浸炭装置の運転方法。 - 前記連続ガス浸炭装置は,外気を取り入れる外気取入れ路を備え,
前記外気取入れ路を開いたとき,外気中の酸素を燃焼に消費させてから,前記外気取入れ路を通じて前記外気を取り入れることを特徴とする,請求項3の連続ガス浸炭装置の運転方法。 - 装置内が負圧になったときに前記出口側排気路を通じて前記装置内に外気が流入する際,前記出口側排気路に流入する外気中の酸素を燃焼に消費させることを特徴とする,請求項3の連続ガス浸炭装置の運転方法。
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JP2007501618A JP4956417B2 (ja) | 2005-02-03 | 2006-02-02 | 雰囲気熱処理装置及びその運転方法 |
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JP2005027542 | 2005-02-03 | ||
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PCT/JP2006/301764 WO2006082891A1 (ja) | 2005-02-03 | 2006-02-02 | 雰囲気熱処理装置及びその運転方法 |
JP2007501618A JP4956417B2 (ja) | 2005-02-03 | 2006-02-02 | 雰囲気熱処理装置及びその運転方法 |
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JPWO2006082891A1 JPWO2006082891A1 (ja) | 2008-06-26 |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5330651B2 (ja) * | 2007-02-26 | 2013-10-30 | Dowaサーモテック株式会社 | 熱処理方法 |
DE102008029001B3 (de) * | 2008-06-20 | 2009-09-17 | Ipsen International Gmbh | Verfahren und Einrichtung zur Wärmebehandlung von metallischen Werkstoffen |
JP5701038B2 (ja) * | 2010-12-14 | 2015-04-15 | 光洋サーモシステム株式会社 | 熱処理炉およびその運転方法 |
CN102787291A (zh) * | 2011-05-16 | 2012-11-21 | 钱佼佼 | 一种热处理渗碳炉的预热区改良结构 |
JP7189115B2 (ja) * | 2019-12-05 | 2022-12-13 | 株式会社日本テクノ | ガス浸炭方法およびガス浸炭装置 |
CN111349882B (zh) * | 2020-04-30 | 2024-07-02 | 海盐联众紧固件有限公司 | 一种高强度推力杆防松螺母用渗碳炉 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6364766U (ja) * | 1986-10-17 | 1988-04-28 | ||
JPH111759A (ja) * | 1997-06-06 | 1999-01-06 | Dowa Mining Co Ltd | ガス浸炭方法及びその装置 |
JP2004010945A (ja) * | 2002-06-05 | 2004-01-15 | Koyo Seiko Co Ltd | 連続浸炭炉 |
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JPS6095428U (ja) * | 1983-11-30 | 1985-06-29 | 東京熱処理工業株式会社 | 雰囲気炉の炉圧調整排ガス燃焼装置 |
JP2809318B2 (ja) * | 1990-06-20 | 1998-10-08 | 同和鉱業株式会社 | 雰囲気炉のガス通し方法 |
JPH0651904B2 (ja) * | 1990-07-03 | 1994-07-06 | 同和鉱業株式会社 | ガス浸炭方法 |
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- 2006-02-02 JP JP2007501618A patent/JP4956417B2/ja active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS6364766U (ja) * | 1986-10-17 | 1988-04-28 | ||
JPH111759A (ja) * | 1997-06-06 | 1999-01-06 | Dowa Mining Co Ltd | ガス浸炭方法及びその装置 |
JP2004010945A (ja) * | 2002-06-05 | 2004-01-15 | Koyo Seiko Co Ltd | 連続浸炭炉 |
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