CN110396657A - A kind of cold rolling produces the surface control process of 800MPa grades of dual phase steels - Google Patents
A kind of cold rolling produces the surface control process of 800MPa grades of dual phase steels Download PDFInfo
- Publication number
- CN110396657A CN110396657A CN201910725364.9A CN201910725364A CN110396657A CN 110396657 A CN110396657 A CN 110396657A CN 201910725364 A CN201910725364 A CN 201910725364A CN 110396657 A CN110396657 A CN 110396657A
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- CN
- China
- Prior art keywords
- dual phase
- cold rolling
- furnace
- steel
- control process
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Abstract
The present invention provides the surface control process that a kind of cold rolling produces 800MPa grades of dual phase steels, step includes: by hot rolling of steel billet curling, cold rolling, zinc-plated, it is -25 DEG C~-35 DEG C that dew-point temperature in furnace is controlled in the zincincation, adjusts the volume content that furnace nose humidifies closing and furnace atmosphere hydrogen to 1~3% before producing the dual phase steel.Pass through the control to furnace area dew point situation, furnace nose humidification state and furnace atmosphere etc., solution for cold-rolling galvanization two-phase high-strength steel zinc layers fluctuating problem specifies direction, zinc-plated two-phase high-strength steel zinc layers fluctuating defect problem is well solved, product quality is effectively improved, considerable economic benefit is brought.
Description
Technical field
The invention belongs to metal material processing technical fields, and in particular to a kind of cold rolling produces the table of 800MPa grades of dual phase steels
Face control method.
Background technique
The zinc-plated producing line of Shoudu Iron and Steel Co flat cold-rolled sheet Co., Ltd, in production process, mainly high strength band steel, strip is offline, is depositing
Surface defect.There are the surface defects that zinc layers rise and fall for the dual phase steel belt steel surface of production, reduce product hierarchy, make the economy of company
Benefit has seriously affected the working condition of normal rhythm of production, producing line technology and operator by greater loss.
In recent years, cold-rolling galvanization product surface quality requirement is stepped up with user, Galvanized Dual Phase Steel surface zinc
Layer fluctuating defect seriously affects the coating and further deep processing of user as a kind of typical surface defect, it is difficult to meet high
Hold the requirement of cold-reduced sheet.
Summary of the invention
In view of this, being zinc-plated the present invention provides the surface control process that a kind of cold rolling produces 800MPa grades of dual phase steels
The solution of coil of strip zinc layers two-phase steel surface zinc layers fluctuating problem specifies direction, asks zinc-plated high-strength two-phase steel surface zinc layers fluctuating
Topic is well solved.
A kind of cold rolling produces the surface control process of 800MPa grades of dual phase steels, and step includes: to crimp hot rolling of steel billet, is cold
It rolls, is zinc-plated, it is -25 DEG C~-35 DEG C that dew-point temperature in furnace is controlled in the zincincation, is produced furnace nose before the dual phase steel
Humidification is closed and the volume content of furnace atmosphere hydrogen is adjusted to 1~3%.
Preferably, furnace nose was humidified into closing in 1.5~2.5 hours before producing the dual phase steel.
Preferably, produce 0.5~1.0 hour volume content by furnace atmosphere hydrogen before the dual phase steel adjust to 1~
3%.
Preferably, the temperature control of the curling is 610~630 DEG C.
Compared with prior art, the invention has the following advantages that the present invention by scene tracking, a large amount of data acquisition and
After analysis, by changing dew-point temperature, furnace nose humidified condition and furnace atmosphere in furnace, turn the elements such as Si, Mn by external oxidation
Internal oxidition has been changed to, so that so that cold rolling is produced 800MPa grades of dual phase steels achievees the effect that no zinc layers rise and fall, has been realized zinc-plated high-strength
The raising of dual phase steel product surface quality improves product hierarchy, brings considerable economic benefit, before having good practical application
Scape.
Detailed description of the invention
Attached drawing 1 is the surface condition figure that gained cold rolling produces 800MPa grades of dual phase steels in the embodiment of the present invention 1.
Attached drawing 2 is the surface condition figure of gained Galvanized Dual Phase Steel in comparative example.
Specific embodiment
To facilitate the understanding of the present invention, present invention work more comprehensively, is meticulously described below in conjunction with embodiment, but this hair
Bright protection scope is not limited to embodiment in detail below.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention, can pass through
Market is commercially available or can be prepared by existing method.
A kind of cold rolling produces the surface control process of 800MPa grades of dual phase steels, and step includes: to crimp hot rolling of steel billet, is cold
It rolls, is zinc-plated, it is -25 DEG C~-35 DEG C that dew-point temperature in furnace is controlled in the zincincation, is produced furnace nose before the dual phase steel
Humidification is closed and the volume content of furnace atmosphere hydrogen is adjusted to 1~3%.
Preferably, in some embodiment of the invention, using the ingredient of steel billet are as follows: by percentage to the quality, C:0.145
~0.175%, Mn:1.85~1.95%, Si:0.45~0.55%, P≤0.015%, S≤0.007%, Alt:0.02~
0.07%, N≤0.005%, surplus are Fe and inevitable impurity.
Preferably, the advanced row heating of plate blank before hot rolling of steel billet, heating temperature are 1210~1300 DEG C.
Preferably, the finishing temperature control of the hot rolling is 870~910 DEG C.
Preferably, the temperature control of the curling is 610~630 DEG C.The coiling temperature that the present invention uses is compared to routine
It batches and decreases, the iron scale for cooperating the reduction of coiling temperature to be formed is lighter in conjunction with matrix, in hot rolling production process more
It is easy to remove, iron scale will be dealt with more clean, arrive the zinc-plated stage, and material matrix surface is more smooth clean, zinc layers
The improvement of fluctuating can be more obvious.Subsequent technique cooperates the adjustment of coiling temperature, and collective effect, which can play, further to be changed
The effect that kind zinc layers rise and fall.
More preferred, it is described in order to make oiler temperature control in above-mentioned section in some embodiment of the invention
The temperature of curling is set as 620 DEG C, and controls the temperature fluctuation of steel toe tail within 10 DEG C.
Preferably, pickling is carried out to hot rolled plate before cold rolling, it can pickling-free or deficient pickling.
Preferably, the pushing rate control of the cold rolling is 54.5-71.6%, according to different material thickness and width reduction ratio
It is adjusted.
Preferably, furnace nose was humidified into closing in 1.5~2.5 hours before producing the dual phase steel.It is zinc-plated to be produced as continuously arranging
Production is generated, refers to and is seen according to production planning and sequencing, furnace nose is humidified and closed by production to 1.5~2.5 hours before dual phase steel.
Preferably, produce 0.5~1.0 hour volume content by furnace atmosphere hydrogen before the dual phase steel adjust to 1~
3%.
The granule surface contral side of 800MPa grades of dual phase steels is produced to cold rolling provided by the present application below in conjunction with specific embodiment
Method is described in detail.
Embodiment 1
A kind of surface control process of 800MPa grades of dual phase steels of cold rolling production is present embodiments provided, step includes:
After the completion of smelting procedure, by heating steel billet, heating temperature is 1250 DEG C.The steel billet ingredient of use is as shown in table 1.
The finishing temperature of hot rolling is set as 890 DEG C by then hot rolling.
Then it crimps, the temperature of the curling is set as 620 DEG C, and control the temperature fluctuation of steel toe tail within 10 DEG C,
To guarantee the practical control of coiling temperature at 610~630 DEG C.
Cold rolling after pickling, cold rolling pushing rate are 55%.
Furnace nose humidification is closed in advance before producing the dual phase steel, is produced 0.5 before the dual phase steel by hot galvanizing for 2 hours
Hour the volume content of furnace atmosphere hydrogen is adjusted to 2%, it is -30 DEG C that dew-point temperature in furnace is controlled in zincincation.
The surface of 800MPa grades of dual phase steels of gained is as shown in Fig. 1, it can be seen from figure 1 that product surface quality is outstanding, no zinc layers
Contoured surface defect.
1 steel billet component list of table
| C | Si | Mn | P ,≤ | S ,≤ | Alt | N ,≤ | |
| Determine | 0.145-0.175 | 0.45-0.55 | 1.85-1.95 | 0.015 | 0.007 | 0.02-0.07 | 0.005 |
| Target | 0.150-0.160 | 0.50 | 1.90 | 0.012 | 0.005 | 0.05 | 0.004 |
Comparative example
This comparative example provides a kind of cold rolling production dual phase steel technique, and step includes:
After the completion of smelting procedure, by heating steel billet, heating temperature is 1250 DEG C.The steel billet ingredient and embodiment 1 one of use
It causes, as shown in table 1.
Then hot rolling, the finishing temperature of hot rolling are 890 DEG C.
Then it crimps, the temperature of curling is set as 670 DEG C.
Cold rolling after pickling, cold rolling pushing rate are 55%.
Hot galvanizing produces the dual phase steel forehearth nose humidification and does not close in advance, before production dual phase steel in half an hour furnace
Atmosphere hydrogen content is 8%, and it is -50 DEG C that dew-point temperature in furnace is controlled in zincincation.
The surface of gained two-phase steel product is as shown in Fig. 2, lacks as it is clear from fig. 2 that product surface has apparent zinc layers to rise and fall
It falls into.
Embodiment 2
A kind of surface control process of 800MPa grades of dual phase steels of cold rolling production is present embodiments provided, step includes:
After the completion of smelting procedure, by heating steel billet, heating temperature is 1250 DEG C.The steel billet ingredient and embodiment 1 one of use
It causes, as shown in table 1.
Then hot rolling, the finishing temperature of hot rolling are 890 DEG C.
Then it crimps, the temperature of the curling is controlled at 615~625 DEG C.
Cold rolling after pickling, cold rolling pushing rate are 60%.
Hot galvanizing closes furnace nose humidification in 2.5 hours in advance before producing the dual phase steel, half small before production dual phase steel
When start furnace atmosphere hydrogen content and adjust to 1%, it is -35 DEG C that dew-point temperature in furnace is controlled in zincincation.
The surface defects such as 800MPa grades of dual phase steel product surface qualities of gained and embodiment 1 are consistent, and no zinc layers rise and fall.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (6)
1. a kind of cold rolling produces the surface control process of 800MPa grades of dual phase steels, step include: by hot rolling of steel billet curling, cold rolling,
Zinc-plated, it is -25 DEG C~-35 DEG C that dew-point temperature in furnace is controlled in the zincincation, adds furnace nose before producing the dual phase steel
The volume content of wet closing and furnace atmosphere hydrogen is adjusted to 1~3%.
2. the surface control process that cold rolling as described in claim 1 produces 800MPa grades of dual phase steels, it is characterised in that: production institute
Furnace nose was humidified into closing in 1.5~2.5 hours before stating dual phase steel.
3. the surface control process that cold rolling as described in claim 1 produces 800MPa grades of dual phase steels, it is characterised in that: the volume
Bent temperature control is 610~630 DEG C.
4. the surface control process that cold rolling as claimed in claim 3 produces 800MPa grades of dual phase steels, it is characterised in that: the volume
Bent temperature is set as 620 DEG C, and controls the temperature fluctuation of steel toe tail within 10 DEG C.
5. the surface control process that cold rolling as described in claim 1 produces 800MPa grades of dual phase steels, it is characterised in that: production institute
0.5~1.0 hour volume content by furnace atmosphere hydrogen is adjusted to 1~3% before stating dual phase steel.
6. the surface control process that cold rolling as described in claim 1 produces 800MPa grades of dual phase steels, it is characterised in that: the steel
Base ingredient are as follows: by percentage to the quality, C:0.145~0.175%, Mn:1.85~1.95%, Si:0.45~0.55%, P≤
0.015%, S≤0.007%, Alt:0.02~0.07%, N≤0.005%, surplus are Fe and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910725364.9A CN110396657A (en) | 2019-08-07 | 2019-08-07 | A kind of cold rolling produces the surface control process of 800MPa grades of dual phase steels |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910725364.9A CN110396657A (en) | 2019-08-07 | 2019-08-07 | A kind of cold rolling produces the surface control process of 800MPa grades of dual phase steels |
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| CN110396657A true CN110396657A (en) | 2019-11-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2290111A1 (en) * | 2009-08-31 | 2011-03-02 | Hyundai Hysco | Dual phase steel sheet and method of manufacturing the same |
| CN102712171A (en) * | 2009-12-21 | 2012-10-03 | 塔塔钢铁艾默伊登有限责任公司 | High strength hot dip galvanised steel strip |
| CN102719751A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | High-strength cold-rolled hot-galvanized dual-phase steel plate and manufacture method thereof |
| CN103160654A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Manufacturing method of ultrahigh strength surface-active steel plate and the steel plate |
| CN108823507A (en) * | 2018-06-28 | 2018-11-16 | 武汉钢铁有限公司 | A kind of tensile strength 800MPa grades of hot-dip galvanized high-strength steels and its minimizing production method |
| CN109097705A (en) * | 2018-09-26 | 2018-12-28 | 武汉钢铁有限公司 | A kind of 800MPa grade cold rolling hot dip galvanizing dual phase steel and its production method |
| CN109385592A (en) * | 2018-10-09 | 2019-02-26 | 北京首钢冷轧薄板有限公司 | A kind of furnace nose zinc gray control system |
-
2019
- 2019-08-07 CN CN201910725364.9A patent/CN110396657A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2290111A1 (en) * | 2009-08-31 | 2011-03-02 | Hyundai Hysco | Dual phase steel sheet and method of manufacturing the same |
| CN102712171A (en) * | 2009-12-21 | 2012-10-03 | 塔塔钢铁艾默伊登有限责任公司 | High strength hot dip galvanised steel strip |
| CN102719751A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | High-strength cold-rolled hot-galvanized dual-phase steel plate and manufacture method thereof |
| CN103160654A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Manufacturing method of ultrahigh strength surface-active steel plate and the steel plate |
| CN108823507A (en) * | 2018-06-28 | 2018-11-16 | 武汉钢铁有限公司 | A kind of tensile strength 800MPa grades of hot-dip galvanized high-strength steels and its minimizing production method |
| CN109097705A (en) * | 2018-09-26 | 2018-12-28 | 武汉钢铁有限公司 | A kind of 800MPa grade cold rolling hot dip galvanizing dual phase steel and its production method |
| CN109385592A (en) * | 2018-10-09 | 2019-02-26 | 北京首钢冷轧薄板有限公司 | A kind of furnace nose zinc gray control system |
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Application publication date: 20191101 |
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