WO2005038059A1 - 光輝焼鈍炉の制御方法 - Google Patents
光輝焼鈍炉の制御方法 Download PDFInfo
- Publication number
- WO2005038059A1 WO2005038059A1 PCT/JP2004/015025 JP2004015025W WO2005038059A1 WO 2005038059 A1 WO2005038059 A1 WO 2005038059A1 JP 2004015025 W JP2004015025 W JP 2004015025W WO 2005038059 A1 WO2005038059 A1 WO 2005038059A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bright annealing
- annealing furnace
- furnace
- atmosphere
- partial pressure
- Prior art date
Links
Classifications
-
- 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
Definitions
- the present invention relates to a method for suppressing generation of white powder in a bright annealing furnace.
- this white powder is accumulated in a large amount in a cooling zone of a bright annealing furnace, a cooler for cooling the atmosphere in the furnace, or the like, and immediately combined with the poor thermal conductivity of the white powder, the bright annealing furnace is used. If the operation continues for a long period of time, the white powder adhering to and accumulating on the cooler for cooling will reduce the cooling performance of the cooler. As a countermeasure, there is a limit to the capacity of the power pump that significantly increases the amount of cooling water, so it was not a preferable solution.
- white powder may hinder the cooling function of the bright annealing furnace or cause a situation in which the product quality is degraded. Therefore, the facilities of the bright annealing furnace have no inconvenience. Nevertheless, for the purpose of simply removing white powder, the bright annealing furnace had to be periodically cooled down and opened and maintenance work such as cleaning had to be performed.
- Patent Document 1 JP-A-10-72624
- the inventor of the present invention has analyzed the components of white powder from the past to the present recovered from actual furnace equipment (hereinafter, referred to as actual equipment). As a result, a mixture of boron oxide was found to be contained in large quantities, and as a result of intensive research on the boron oxide formation process, the formation of boron oxide showed that boron contained in the heat-treated steel strip and residual boron in the bright annealing furnace. The inventors have concluded that the present invention is related to oxygen and moisture, and have completed the present invention. If the formation of the boron oxide sulfide can be suppressed, the above-mentioned situation caused by white powder can be fundamentally solved.
- the present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a method for controlling a bright annealing furnace that suppresses generation of white powder in a bright annealing furnace.
- the method of mosquito ⁇ Cal bright annealing furnace of the present invention is characterized by smaller than the water vapor partial pressure 1 X 10- 5 in the furnace atmosphere of the bright annealing furnace boron oxide is produced . Specifically, by lowering the dew point of the furnace atmosphere, it is preferably smaller than 1 X 10- 5 water vapor partial pressure.
- the bright annealing furnace control method of the present invention is based on the reason that white powder is generated in a large amount in a bright annealing furnace in which heat treatment is performed in a furnace atmosphere that does not oxidize stainless steel or the like and adheres to the inside of the furnace. By being able to locate it, its generation can be effectively suppressed.
- the power of the test results is also understood to be (1) the partial pressure of water vapor was low due to the low dew point, and (2) there was no oxygen source to oxidize boron. This means that the residual water and oxygen did not oxidize with the boron in the heat-treated steel strip, so that the diffusion and desorption of boron did not work.
- the inventor of the present invention concluded that these conditions were not satisfied in the actual machine, that is, since the dew point of the atmosphere in a normal bright annealing furnace was high, residual moisture and oxygen were present in the furnace. Therefore, it was found that they oxidized with boron in the heat-treated steel strip, and as a result, boron oxide was formed and became a causative substance of white powder.
- the present invention is effective only by lowering the dew point.
- two methods have been found to be particularly effective. That is, (1) a method of introducing a gas containing hydrocarbons into the furnace, and (2) a method of adding a compound containing carbon to the furnace atmosphere.
- the gas containing hydrocarbon is a gas, it can be easily added to the atmosphere in the furnace, and can be applied to any bright annealing furnace regardless of the type.
- a solid such as solid carbon
- the method of the present invention can be carried out simply by simply installing it on the heating zone side during inspection and maintenance of the bright annealing furnace.
- Figure 1 Ellingham showed standard free E energy AG Q of G3 ⁇ 4bs of boron oxide which is a main component of white powder diagram
- Figure 2 methane relates Example 1 below, carbon monoxide, water vapor 3 is a logarithmic graph showing the relationship of each partial pressure at 1400K.
- Hydrocarbons are considered to react with trace amounts of water H O and oxygen O present in the bright annealing furnace as follows.
- the pressure P (H) may be considered to be 1 (the same applies hereinafter).
- a method for introducing a compound containing carbon into a furnace will be described. Taking the example of solid carbon (C (solid)) as an example of a compound, it can be explained with a carbonate such as barium carbonate BaCO. In particular, when solid carbon is introduced into the furnace, a reaction similar to that of the solid carburizing method occurs.
- C solid carbon
- BaCO barium carbonate
- FIG. 2 is a logarithmic graph showing the relationship between each partial pressure of methane, carbon monoxide, and water vapor at 1400 K.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Furnace Details (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/574,637 US20070107817A1 (en) | 2003-10-17 | 2004-10-12 | Method for controlling bright annealing furnace |
EP04792269A EP1679385A4 (en) | 2003-10-17 | 2004-10-12 | METHOD FOR CONTROLLING A BLANK GLOWING STATION |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-358078 | 2003-10-17 | ||
JP2003358078A JP2005120448A (ja) | 2003-10-17 | 2003-10-17 | 光輝焼鈍炉の制御方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005038059A1 true WO2005038059A1 (ja) | 2005-04-28 |
Family
ID=34463278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/015025 WO2005038059A1 (ja) | 2003-10-17 | 2004-10-12 | 光輝焼鈍炉の制御方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070107817A1 (ja) |
EP (1) | EP1679385A4 (ja) |
JP (1) | JP2005120448A (ja) |
CN (1) | CN1867686A (ja) |
TW (1) | TWI338052B (ja) |
WO (1) | WO2005038059A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010131375A1 (ja) * | 2009-05-11 | 2010-11-18 | 中外炉工業株式会社 | 連続焼鈍炉 |
CN102534182A (zh) * | 2012-02-23 | 2012-07-04 | 中冶南方工程技术有限公司 | 一种用于罩式退火炉工艺的控制*** |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013146520A1 (ja) * | 2012-03-27 | 2013-10-03 | 関東冶金工業株式会社 | 熱処理方法および熱処理装置、並びに熱処理システム |
CN105018714B (zh) * | 2014-04-17 | 2017-02-22 | 宝山钢铁股份有限公司 | 连续退火炉内气氛增湿方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53110909A (en) * | 1977-03-10 | 1978-09-28 | Oriental Engineering Co | Control method of furnace atomosphere |
JPS5735620A (en) * | 1980-08-07 | 1982-02-26 | Oriental Eng Kk | Method for controlling furnace gas in bright heat treatment |
JPH1072624A (ja) * | 1996-08-30 | 1998-03-17 | Nisshin Steel Co Ltd | 光輝焼鈍炉におけるホワイトパウダーの削減方法 |
JPH11158559A (ja) * | 1997-11-27 | 1999-06-15 | Sumitomo Metal Ind Ltd | 連続焼鈍炉の炉内雰囲気制御方法 |
JP2003247787A (ja) * | 2002-02-22 | 2003-09-05 | Chugai Ro Co Ltd | 連続焼鈍炉におけるホワイトパウダー除去装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3733884A1 (de) * | 1987-10-07 | 1989-04-27 | Linde Ag | Verfahren zum gluehen von metallteilen in durchlaufoefen |
JPH032317A (ja) * | 1989-05-29 | 1991-01-08 | Sumitomo Metal Ind Ltd | 光輝焼鈍炉の雰囲気ガス調整方法 |
DE4010102A1 (de) * | 1990-03-29 | 1991-10-02 | Linde Ag | Verfahren zum gluehen von staehlernem gluehgut |
JP2530580Y2 (ja) * | 1991-06-12 | 1997-03-26 | 日本酸素株式会社 | 熱処理雰囲気炉 |
AT1469U1 (de) * | 1996-04-10 | 1997-05-26 | E & E Elektronik Gmbh | Verfahren zum ermitteln der absoluten luftfeuchtigkeit |
JPH1150202A (ja) * | 1997-07-29 | 1999-02-23 | Sumitomo Metal Ind Ltd | 耐銹性に優れたフェライト系ステンレス鋼光輝焼鈍材およびその製造方法 |
GB9800528D0 (en) * | 1998-01-12 | 1998-03-11 | Boc Group Plc | Furnace atmosphere dew point control |
JP3882470B2 (ja) * | 2000-06-06 | 2007-02-14 | 住友金属工業株式会社 | オーステナイト系ステンレス鋼板の製造方法 |
-
2003
- 2003-10-17 JP JP2003358078A patent/JP2005120448A/ja active Pending
-
2004
- 2004-09-30 TW TW093129553A patent/TWI338052B/zh not_active IP Right Cessation
- 2004-10-12 WO PCT/JP2004/015025 patent/WO2005038059A1/ja active Application Filing
- 2004-10-12 EP EP04792269A patent/EP1679385A4/en not_active Ceased
- 2004-10-12 US US10/574,637 patent/US20070107817A1/en not_active Abandoned
- 2004-10-12 CN CNA2004800305822A patent/CN1867686A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53110909A (en) * | 1977-03-10 | 1978-09-28 | Oriental Engineering Co | Control method of furnace atomosphere |
JPS5735620A (en) * | 1980-08-07 | 1982-02-26 | Oriental Eng Kk | Method for controlling furnace gas in bright heat treatment |
JPH1072624A (ja) * | 1996-08-30 | 1998-03-17 | Nisshin Steel Co Ltd | 光輝焼鈍炉におけるホワイトパウダーの削減方法 |
JPH11158559A (ja) * | 1997-11-27 | 1999-06-15 | Sumitomo Metal Ind Ltd | 連続焼鈍炉の炉内雰囲気制御方法 |
JP2003247787A (ja) * | 2002-02-22 | 2003-09-05 | Chugai Ro Co Ltd | 連続焼鈍炉におけるホワイトパウダー除去装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1679385A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010131375A1 (ja) * | 2009-05-11 | 2010-11-18 | 中外炉工業株式会社 | 連続焼鈍炉 |
JP2010261089A (ja) * | 2009-05-11 | 2010-11-18 | Chugai Ro Co Ltd | 連続焼鈍炉 |
CN102534182A (zh) * | 2012-02-23 | 2012-07-04 | 中冶南方工程技术有限公司 | 一种用于罩式退火炉工艺的控制*** |
Also Published As
Publication number | Publication date |
---|---|
US20070107817A1 (en) | 2007-05-17 |
EP1679385A4 (en) | 2007-05-30 |
CN1867686A (zh) | 2006-11-22 |
JP2005120448A (ja) | 2005-05-12 |
TWI338052B (en) | 2011-03-01 |
TW200526790A (en) | 2005-08-16 |
EP1679385A1 (en) | 2006-07-12 |
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