CN109988893A - A kind of continuous annealing process for reducing nano-oxide and generating - Google Patents
A kind of continuous annealing process for reducing nano-oxide and generating Download PDFInfo
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- CN109988893A CN109988893A CN201910344073.5A CN201910344073A CN109988893A CN 109988893 A CN109988893 A CN 109988893A CN 201910344073 A CN201910344073 A CN 201910344073A CN 109988893 A CN109988893 A CN 109988893A
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- steel
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- protective atmosphere
- dew point
- annealing process
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- 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
- C21D1/26—Methods of annealing
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- 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
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The present invention relates to a kind of continuous annealing process that reduction nano surface oxide generates.The technique obtains the heating process curve, the ingredient of protective atmosphere and the content of protective atmosphere of steel continuous annealing according to the corresponding continuous annealing process rules of steel, and the dew point of protective atmosphere is formulated according to the type of steel.Beneficial effects of the present invention: under conditions of not changing heating process; the technique can control the generation of cold rolling steel nano surface oxide during continuous annealing from source; it avoids steel from entering hardening slot rear surface and pore occurs; guarantee that the total quality of steel is high, the dew point of protective atmosphere is to be easier to control during continuous annealing.
Description
Technical field
The present invention relates to a kind of continuous annealing process that reduction nano surface oxide generates.
Background technique
Cold rolling production unit is the molding important procedure of steel products in steel and iron industry production, according to steel mill's product quality in recent years
It counts, there is nearly 50 percent, belt steel product surface quality shakiness related with its surface quality in belt steel product quality objection
Fixed reason is: steel can inevitably be formed on its surface oxide particle during continuous annealing, these oxides
Particle has part when steel plate enters hardening slot and falls in hardening slot, since continuous annealing unit is an automated production
Assembly line, if things go on like this, the oxide particle in hardening slot will be more and more, the final surface quality for influencing steel.
Nippon, South Korea Pu etc. all there is a problem that it is this similar, from the information being currently known, Japan's new day
Tie Jun saliva factory continuous annealing unit has the post processing mode of pickling and flash after annealing furnace, thus can effectively slow down strip table
The dirty defect in face；The super-high strength steel of Pu Xiang steel mill, South Korea is produced by different annealing units respectively from automobile exterior panel, is surpassed simultaneously
Also there is the post processing mode of pickling and flash after high-strength steel unit annealing furnace, the dirty lacuna of belt steel surface is not serious, can
Certain relaxation effect is played, above method is mainly by the subsequent processing to steel oxidation object and to the place of hardening slot water quality
For reason to alleviate quality problems caused by steel, these methods have one to the pore and other issues for solving the subsequent appearance of steel plate
Fixed effect, but all do not consider from the formation angle for reducing surface of steel plate oxide.
Summary of the invention
The purpose of the present invention is to provide a kind of continuous annealing process that reduction nano surface oxide generates, and can add not changing
Under conditions of thermal process, the generation of steel surface oxide is effectively reduced, guarantees that the total quality of steel is high.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of continuous annealing process for reducing nano surface oxide and generating, comprising the following steps:
Step 1: according to the corresponding continuous annealing process rules of steel, heating process curve, the protection of steel continuous annealing are obtained
The ingredient of atmosphere and the content of protective atmosphere；
Step 2: according to the protective atmosphere ingredient of the heating process curve of steel continuous annealing and setting, the continuous of steel is formulated
Annealing process；
Step 3: the dew point of protective atmosphere during continuous annealing is formulated according to the type of steel；
Step 4: according to the corresponding continuous annealing process rules of steel, numerical value required by the dew point of protective atmosphere is obtained；
Step 5: according to established continuous annealing heating process curve, the ingredient of obtained protective atmosphere and established
The dew point of protective atmosphere carries out the continuous annealing process of steel.
As further scheme of the invention, in step 3, when steel type is that HSS steel or Mn content are relatively high
Steel when, the dew point of protective atmosphere is established as the minimum value in reasonable dew point.
As further scheme of the invention, in step 3, when steel type is that IF steel or Mn content are relatively low
Steel when, the dew point of protective atmosphere is established as the maximum value in reasonable dew point.
Compared with prior art, the present invention it is a kind of reduce the continuous annealing process that oxide on surface generates have it is following a little: it is logical
The dew point of protective atmosphere during controlling continuous annealing is crossed, alleviates its surface after steel enter hardening slot and generates asking for pore
Topic, controls the generation of cold rolling steel nano surface oxide during continuous annealing from source；In continuous annealing
The dew point control of Cheng Zhong, protective atmosphere are to be easier to realize.
Detailed description of the invention
Fig. 1 is the heating process curve of continuous annealing in the embodiment of the present invention.
Fig. 2 is the schematic diagram for the HSS steel surface oxide that Mn content is high in the embodiment of the present invention.
Fig. 3 is the schematic diagram for the IF steel surface oxide that Mn content is low in the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, technical solution in the embodiment of the present invention is described.
A kind of continuous annealing process for reducing nano surface oxide and generating, comprising the following steps:
Step 1: according to the corresponding continuous annealing process rules of steel, heating process curve, the protection of steel continuous annealing are obtained
The ingredient of atmosphere and the content of protective atmosphere；
Step 2: according to the protective atmosphere ingredient of the heating process curve of steel continuous annealing and setting, the continuous of steel is formulated
Annealing process；
Step 3: the dew point of protective atmosphere during continuous annealing is formulated according to the type of steel；
Step 4: according to the corresponding continuous annealing process rules of steel, numerical value required by the dew point of protective atmosphere is obtained；
Step 5: according to established continuous annealing heating process curve, the ingredient of obtained protective atmosphere and established
The dew point of protective atmosphere carries out the continuous annealing process of steel.
The present embodiment use a kind of Mn content for 1.7% HSS steel and a kind of IF steel that Mn content is 0.15%, HSS steel and
The cut size of IF steel is 120mmX220mm, is made after both using the grease stain of ultrasonic wave acetone clean the surface, cleaning to finish
With alcohol washes, drying operation is then carried out, and is protected using rust-preventing film, Fig. 3 is the heater according to continuous annealing
Continuous annealing heating process curve obtained from skill rules, the H that continuous annealing process can be 2% with content2The N for being 98% with content2
HSS steel and IF steel are tested for the ingredient of protective atmosphere, simulated annealing experiment in, HSS steel choose dew point of atmosphere be-
40 degrees Celsius, the dew point of atmosphere that IF steel is chosen is 0 degree Celsius.
After simulated annealing experiment, pass through the surface of electron microscope observation HSS steel and the surface of IF steel, Fig. 2 performance
Oxide on surface under HSS steel is -40 degrees Celsius in dew point of atmosphere out significantly reduces, and it is 0 that Fig. 3, which shows IF steel in atmosphere drop point,
Oxide on surface under degree Celsius significantly reduces.
Claims (3)
1. a kind of continuous annealing process for reducing nano surface oxide and generating, it is characterized in that the following steps are included:
Step 1: according to the corresponding continuous annealing process rules of steel, heating process curve, the protection of steel continuous annealing are obtained
The ingredient of atmosphere and the content of protective atmosphere；
Step 2: according to the protective atmosphere ingredient of the heating process curve of steel continuous annealing and setting, the continuous of steel is formulated
Annealing process；
Step 3: the dew point of protective atmosphere during continuous annealing is formulated according to the type of steel；
Step 4: according to the corresponding continuous annealing process rules of steel, numerical value required by the dew point of protective atmosphere is obtained；
Step 5: according to established continuous annealing heating process curve, the ingredient of obtained protective atmosphere and established
The dew point of protective atmosphere carries out the continuous annealing process of steel.
2. the continuous annealing process according to claim 1 for reducing nano surface oxide and generating, it is characterized in that in step 3,
When steel type is HSS steel or the relatively high steel of Mn content, the dew point of protective atmosphere is established as reasonable dew point
Interior minimum value.
3. the continuous annealing process according to claim 1 for reducing nano surface oxide and generating, it is characterized in that in step 3,
When steel type is IF steel or the relatively low steel of Mn content, the dew point of protective atmosphere is established as in reasonable dew point
Maximum value.
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| CN201910344073.5A CN109988893A (en) | 2019-04-26 | 2019-04-26 | A kind of continuous annealing process for reducing nano-oxide and generating |
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| CN201910344073.5A CN109988893A (en) | 2019-04-26 | 2019-04-26 | A kind of continuous annealing process for reducing nano-oxide and generating |
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Citations (9)
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|---|---|---|---|---|
| BE1014997A3 (en) * | 2001-03-28 | 2004-08-03 | Ct Rech Metallurgiques Asbl | Continuous annealing of steel strip prior to galvanising using direct flame preheating to form an oxide film followed by full annealing and reduction stages to mature this oxide film |
| CN101287854A (en) * | 2005-10-14 | 2008-10-15 | 新日本制铁株式会社 | Continuous annealing hot-dip coating method and continuous annealing hot-dip coating device for Si-containing steel sheet |
| CN103261453A (en) * | 2010-12-17 | 2013-08-21 | 杰富意钢铁株式会社 | Method for continuously annealing steel strip and hot-ip galvanization method |
| JP5655955B2 (en) * | 2012-06-13 | 2015-01-21 | Ｊｆｅスチール株式会社 | Steel strip continuous annealing method, steel strip continuous annealing device, hot dip galvanized steel strip manufacturing method and hot dip galvanized steel strip manufacturing device |
| CN106244923A (en) * | 2016-08-30 | 2016-12-21 | 宝山钢铁股份有限公司 | A kind of phosphorus characteristic and the excellent cold rolling high strength steel plate of forming property and manufacture method thereof |
| CN106987790A (en) * | 2017-04-10 | 2017-07-28 | 唐山钢铁集团有限责任公司 | The continuous zinc coating method of high-silicon high-manganese galvanized steel strip |
| CN107164624A (en) * | 2017-04-10 | 2017-09-15 | 首钢总公司 | A kind of method for controlling phosphorous cold rolling high-strength steel surface pit defect |
| US20180100209A1 (en) * | 2015-04-22 | 2018-04-12 | Cockerill Maintenance & Ingenierie S.A. | Method and device for reaction control |
| CN108203789A (en) * | 2016-12-16 | 2018-06-26 | 宝山钢铁股份有限公司 | The high-strength IF steel and its manufacturing method of a kind of fine corrosion resistance |
-
2019
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|---|---|---|---|---|
| BE1014997A3 (en) * | 2001-03-28 | 2004-08-03 | Ct Rech Metallurgiques Asbl | Continuous annealing of steel strip prior to galvanising using direct flame preheating to form an oxide film followed by full annealing and reduction stages to mature this oxide film |
| CN101287854A (en) * | 2005-10-14 | 2008-10-15 | 新日本制铁株式会社 | Continuous annealing hot-dip coating method and continuous annealing hot-dip coating device for Si-containing steel sheet |
| CN103261453A (en) * | 2010-12-17 | 2013-08-21 | 杰富意钢铁株式会社 | Method for continuously annealing steel strip and hot-ip galvanization method |
| JP5655955B2 (en) * | 2012-06-13 | 2015-01-21 | Ｊｆｅスチール株式会社 | Steel strip continuous annealing method, steel strip continuous annealing device, hot dip galvanized steel strip manufacturing method and hot dip galvanized steel strip manufacturing device |
| US20180100209A1 (en) * | 2015-04-22 | 2018-04-12 | Cockerill Maintenance & Ingenierie S.A. | Method and device for reaction control |
| CN106244923A (en) * | 2016-08-30 | 2016-12-21 | 宝山钢铁股份有限公司 | A kind of phosphorus characteristic and the excellent cold rolling high strength steel plate of forming property and manufacture method thereof |
| CN108203789A (en) * | 2016-12-16 | 2018-06-26 | 宝山钢铁股份有限公司 | The high-strength IF steel and its manufacturing method of a kind of fine corrosion resistance |
| CN106987790A (en) * | 2017-04-10 | 2017-07-28 | 唐山钢铁集团有限责任公司 | The continuous zinc coating method of high-silicon high-manganese galvanized steel strip |
| CN107164624A (en) * | 2017-04-10 | 2017-09-15 | 首钢总公司 | A kind of method for controlling phosphorous cold rolling high-strength steel surface pit defect |
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Application publication date: 20190709 |