CN108517459A - A kind of boracic low-carbon hot-rolling acid-cleaning plate and its production method - Google Patents
A kind of boracic low-carbon hot-rolling acid-cleaning plate and its production method Download PDFInfo
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- CN108517459A CN108517459A CN201810300246.9A CN201810300246A CN108517459A CN 108517459 A CN108517459 A CN 108517459A CN 201810300246 A CN201810300246 A CN 201810300246A CN 108517459 A CN108517459 A CN 108517459A
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- cleaning plate
- rolling acid
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to hot rolling acid-cleaning plate fields, specifically a kind of boracic low-carbon hot-rolling acid-cleaning plate and preparation method thereof, boron content 0.0010~0.0030% is added in the low-carbon hot-rolling acid-cleaning plate of 2.0mm≤thickness≤6.0mm, it obtains in desired tissue performance basis, the measure of various control surface quality can be taken, the problem of efficiently solving steel plate mixed crystal, especially improving rolled edge mixed crystal.Boron is added in low-carbon hot-rolling acid-cleaning plate, austenite is reduced to ferrite transformation temperature, so that structural transformation does not occur when 840~860 DEG C of hot rolling stage finishing temperature, i.e. no mixed crystal defect, uniform structure property is finally obtained, while certainly scale defect creates advantage for a large amount of de-scalings hydrolysis of hot rolling stage input.
Description
Technical field
The present invention relates to hot rolling acid-cleaning plate fields, and in particular to a kind of boracic low-carbon hot-rolling acid-cleaning plate and its production method.
Background technology
As steel rolling process technology is constantly progressive, the performance forward direction cold-reduced sheet of hot rolling acid-cleaning plate is close, makes " with hot Dai Leng "
Technically it is achieved.Hot rolling acid-cleaning plate is a kind of higher product of the cost performance between cold-reduced sheet and hot rolled plate, is had
Good market development foreground.Low-carbon hot-rolling acid-cleaning plate is most widely used, and mesh is mainly used in automobile industry, compressor row
Industry, machine industry, zero match processing industry and variously-shaped stamping parts etc..
Low-carbon hot-rolling acid-cleaning plate when hot rolling stage produces should control surface quality, control structure property, the two again
It is required to certain temperature, there are certain contradictions for the temperature control both in practical control.Quality control on the surface needs hot rolling
Stage, which takes, is easy to remove iron scale control measure, such as distribution and pressure, the heating temperature of de-scaling water, and these measures
The finishing temperature of steel plate can be caused relatively low, the rolled edge temperature of especially steel plate is too low, and relatively low finishing temperature is to will appear mixed crystal
Often there is mixed crystal defect in the rolled edge of defect, steel plate.
The finishing temperature setting range of low-carbon hot-rolling acid-cleaning plate hot rolling stage is generally 870~930 DEG C at present, but for low
Carbon hot rolling acid-cleaning plate, the finishing temperature are more difficult to control.Using the method for addition trace B, finishing temperature is reduced to 840~860
DEG C, the problem of efficiently solving steel plate mixed crystal, especially improve rolled edge mixed crystal.
Invention content
The object of the present invention is to provide a kind of boracic low-carbon hot-rolling acid-cleaning plate and its production method, 2.0mm≤thickness≤
Boron content 0.0010~0.0030% is added in the low-carbon hot-rolling acid-cleaning plate of 6.0mm, is obtained in desired tissue performance basis, can be adopted
The measure for taking various control surface quality, the problem of efficiently solving steel plate mixed crystal, especially improve rolled edge mixed crystal.Low-carbon heat
It rolls and adds boron in acid-cleaning plate, reduce austenite to ferrite transformation temperature so that when 840~860 DEG C of hot rolling stage finishing temperature
Structural transformation does not occur, i.e., no mixed crystal defect finally obtains uniform structure property, while largely being removed for hot rolling stage input
Certainly scale defect creates advantage for squama hydrolysis.
A kind of boracic low-carbon hot-rolling acid-cleaning plate, boracic low-carbon hot-rolling acid-cleaning plate continuous casting billet contain the object of following weight percent
Material：C：0.01%~0.08%, Si≤0.07%, Mn：0.10%~0.40%, P≤0.020%, S≤0.015%, Alt：
0.020%~0.070%, B：0.0010%~0.0030%, N≤0.0060%；Surplus is iron and inevitable impurity.
A kind of preparation method of boracic low-carbon hot-rolling acid-cleaning plate, includes the following steps：
(1) thickness≤6mm boracic low-carbon hot-rolling acid-cleaning plate continuous casting billets contain the material of following weight percent：C：0.01%
~0.08%, Si≤0.07%, Mn：0.10%~0.40%, P≤0.020%, S≤0.015%, Alt：0.020%~
0.070%, B：0.0010%~0.0030%, N≤0.0060%；Surplus is iron and inevitable impurity；
(2) continuous casting billet is placed in walking beam furnace and is heated, 40-80min is kept the temperature at 1170-1270 DEG C；Strand is come out of the stove
After laggard horizontal high voltage water de-scaling, rolled into roughing mill, 1080 DEG C -1150 DEG C of start rolling temperature；Intermediate base temperature >=950 after roughing
DEG C, subsequently enter mm finishing mill unit rolling, 840 DEG C -860 DEG C of finishing temperature；It is batched after section cooling, 600 DEG C -700 of coiling temperature
℃；Coils of hot-rolled steel it is hot rolled it is smooth after in pickling lines carry out pickling, oiling, final production goes out hot rolling acid-cleaning coiled sheet, 2.0mm
≤ thickness≤6.0mm.
Beneficial effects of the present invention：
Rolled edge mixed crystal problem is solved, plate property is promoted：Boron reduces austenite to ferrite transformation temperature, rolled edge
When being slightly less than 870 DEG C structural transformation does not also occur for temperature, makes steel plate even tissue, no mixed crystal defect.
It improves hot rolling and produces operability：Since acid-cleaning plate surface quality requirements are high, after the art of this patent, Ke Yi
The a large amount of measure for improving surface quality of hot rolling stage input, is convenient for the relationship of match surface quality and structure property, improves
Hot rolling produces operability.
Specific implementation mode
Embodiment 1
In the present embodiment, by weight percentage, thickness is that 2.0mm boracic low-carbon hot-rolling acid-cleaning plate alloying components are：C：
0.027%, Si：0.01%, Mn：0.25%, P：0.014%, S：0.006%, Alt (full aluminium)：0.030%, B：0.0011%,
N：0.0036%, surplus is iron and inevitable impurity.
In the present embodiment, thickness is that the production method of 2.0mm boracic low-carbon hot-rolling acid-cleaning plates is as follows：
1) molten steel according to a conventional method, pours into strand；
2) strand is placed in walking beam furnace and is heated, 60min is kept the temperature at 1180 DEG C；Strand is come out of the stove laggard horizontal high voltage water
It after de-scaling, is rolled into roughing mill, roughing de-scaling water input, 1110 DEG C of start rolling temperature；Intermediate 1060 DEG C of base temperature after roughing, with
Enter mm finishing mill unit afterwards to roll, 860 DEG C of finishing temperature；It is batched after section cooling, 670 DEG C of coiling temperature.It is organized as uniform in size
Ferrite, product yield strength (ReL) 246MPa, tensile strength (Rm) 333MPa, elongation after fracture (A50) 38.5%.
Embodiment 2
In the present embodiment, by weight percentage, thickness is that 4.0mm boracic low-carbon hot-rolling acid-cleaning plate alloying components are：C：
0.04%, Si：0.012%, Mn：0.21%, P：0.013%, S：0.008%, Alt (full aluminium)：0.040%, B：0.0016%,
N：0.0048%, surplus is iron and inevitable impurity.
In the present embodiment, thickness is that the production method of 4.0mm boracic low-carbon hot-rolling acid-cleaning plates is as follows：
1) smelting molten steel according to a conventional method, pours into strand；
2) strand is placed in walking beam furnace and is heated, 60min is kept the temperature at 1200 DEG C；Strand is come out of the stove laggard horizontal high voltage water
It after de-scaling, is rolled into roughing mill, roughing de-scaling water input, 1130 DEG C of start rolling temperature；Intermediate 1050 DEG C of base temperature after roughing, with
Enter mm finishing mill unit afterwards to roll, 840 DEG C of finishing temperature；It is batched after section cooling, 620 DEG C of coiling temperature.It is organized as uniform in size
Ferrite, product yield strength (ReL) 239MPa, tensile strength (Rm) 338MPa, elongation after fracture (A50) 48%.
Embodiment 3
In the present embodiment, by weight percentage, thickness is that 3.0mm boracic low-carbon hot-rolling acid-cleaning plate alloying components are：C：
0.038%, Si：0.02%, Mn：0.23%, P：0.010%, S：0.010%, Alt (full aluminium)：0.020%, B：0.0020%,
N：0.0038%, surplus is iron and inevitable impurity.
In the present embodiment, thickness is that the production method of 3.0mm boracic low-carbon hot-rolling acid-cleaning plates is as follows：
1) smelting molten steel according to a conventional method, pours into strand；
2) strand is placed in walking beam furnace and is heated, 60min is kept the temperature at 1210 DEG C；Strand is come out of the stove laggard horizontal high voltage water
It after de-scaling, is rolled into roughing mill, roughing de-scaling water input, 1130 DEG C of start rolling temperature；Intermediate 1050 DEG C of base temperature after roughing, with
Enter mm finishing mill unit afterwards to roll, 852 DEG C of finishing temperature；It is batched after section cooling, 640 DEG C of coiling temperature.It is organized as uniform in size
Ferrite, product yield strength (ReL) 221MPa, tensile strength (Rm) 321MPa, elongation after fracture (A50) 40.5%.
Although having been combined the preferred embodiment of the present invention above shows that the present invention, those skilled in the art will
It will be appreciated that without departing from the spirit and scope of the present invention, can carry out various modifications, replace and change to the present invention
Become.Therefore, the present invention should not be limited by above-described embodiment, and should be limited by appended claims and its equivalent.
Claims (5)
1. a kind of boracic low-carbon hot-rolling acid-cleaning plate, which is characterized in that the alloy of thickness≤6.0mm boracic low-carbon hot-rolling acid-cleaning plates at
It is divided into：C：0.01%~0.08%, Si≤0.07%, Mn：0.10%~0.40%, P≤0.020%, S≤0.015%, Alt
(full aluminium)：0.020%~0.070%, B：0.0010%~0.0030%, N≤0.0060%；Surplus is for iron and inevitably
Impurity.
2. a kind of boracic low-carbon hot-rolling acid-cleaning plate according to claim 1, which is characterized in that thickness is that 2.0mm boracics are low
Carbon hot rolling acid-cleaning plate alloying component is：C：0.027%, Si：0.01%, Mn：0.25%, P：0.014%, S：0.006%, Alt
(full aluminium)：0.030%, B：0.0011%, N：0.0036%, surplus is iron and inevitable impurity.
3. a kind of boracic low-carbon hot-rolling acid-cleaning plate according to claim 1, which is characterized in that by weight percentage, thick
Degree is that 3.0mm boracic low-carbon hot-rolling acid-cleaning plate alloying components are：C：0.038%, Si：0.02%, Mn：0.23%, P：
0.010%, S：0.010%, Alt (full aluminium)：0.020%, B：0.0020%, N：0.0038%, surplus is iron and inevitable
Impurity.
4. a kind of boracic low-carbon hot-rolling acid-cleaning plate according to claim 1, which is characterized in that by weight percentage, thick
Degree is that 4.0mm boracic low-carbon hot-rolling acid-cleaning plate alloying components are：C：0.04%, Si：0.012%, Mn：0.21%, P：
0.013%, S：0.008%, Alt (full aluminium)：0.040%, B：0.0016%, N：0.0048%, surplus is iron and inevitable
Impurity.
5. preparing a kind of method of boracic low-carbon hot-rolling acid-cleaning plate as described in claim 1, which is characterized in that including walking as follows
Suddenly：(1) thickness≤6mm boracic low-carbon hot-rolling acid-cleaning plate continuous casting billets contain the material of following weight percent：C：0.01%~
0.08%, Si≤0.07%, Mn：0.10%~0.40%, P≤0.020%, S≤0.015%, Alt：0.020%~
0.070%, B：0.0010%~0.0030%, N≤0.0060%；Surplus is iron and inevitable impurity；
(2) continuous casting billet is placed in walking beam furnace and is heated, 40-80min is kept the temperature at 1170-1270 DEG C；Strand is come out of the stove laggard
After horizontal high voltage water de-scaling, rolled into roughing mill, 1080 DEG C -1150 DEG C of start rolling temperature；Intermediate base temperature >=950 DEG C after roughing,
Subsequently enter mm finishing mill unit rolling, 840 DEG C -860 DEG C of finishing temperature；It is batched after section cooling, 600 DEG C -700 DEG C of coiling temperature；
Coils of hot-rolled steel it is hot rolled it is smooth after in pickling lines carry out pickling, oiling, final production goes out hot rolling acid-cleaning coiled sheet, 2.0mm≤
Thickness≤6.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810300246.9A CN108517459A (en) | 2018-04-04 | 2018-04-04 | A kind of boracic low-carbon hot-rolling acid-cleaning plate and its production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810300246.9A CN108517459A (en) | 2018-04-04 | 2018-04-04 | A kind of boracic low-carbon hot-rolling acid-cleaning plate and its production method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852891A (en) * | 2017-11-30 | 2019-06-07 | 上海梅山钢铁股份有限公司 | A kind of low-carbon boron-containing steel continuous casting steel billet corner crack control method |
| CN111254366A (en) * | 2020-03-19 | 2020-06-09 | 本钢板材股份有限公司 | Production method of steel for hot-rolled boron-containing steel pipe |
| CN112501513A (en) * | 2020-11-30 | 2021-03-16 | 日照宝华新材料有限公司 | Low-carbon acid-pickled steel with excellent formability and surface quality and production method thereof |
| CN112501502A (en) * | 2020-10-31 | 2021-03-16 | 日照宝华新材料有限公司 | Hot-rolled pickled thin plate strip and transverse fold control method thereof |
| CN114645195A (en) * | 2020-10-31 | 2022-06-21 | 日照宝华新材料有限公司 | Hot-rolled pickled sheet band without transverse crease defect |
| CN115449712A (en) * | 2022-09-14 | 2022-12-09 | 浙江东南新材科技有限公司 | High-strength pickled plate and preparation method thereof |
| CN115505817A (en) * | 2021-06-07 | 2022-12-23 | 上海梅山钢铁股份有限公司 | Production method of low-thickness low-carbon B-containing hot rolled steel plate |
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| CN103572164A (en) * | 2012-07-31 | 2014-02-12 | 攀钢集团攀枝花钢钒有限公司 | Hot-rolled pickled plate and production method thereof |
| CN106756568A (en) * | 2017-02-23 | 2017-05-31 | 本钢板材股份有限公司 | Without niobium low cost S 355MC hot rolling acid-cleaning plates and its production method |
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| JP2009249714A (en) * | 2008-04-09 | 2009-10-29 | Nippon Steel Corp | Method for producing hot-rolled steel sheet excellent in surface-processing property |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852891A (en) * | 2017-11-30 | 2019-06-07 | 上海梅山钢铁股份有限公司 | A kind of low-carbon boron-containing steel continuous casting steel billet corner crack control method |
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| CN111254366A (en) * | 2020-03-19 | 2020-06-09 | 本钢板材股份有限公司 | Production method of steel for hot-rolled boron-containing steel pipe |
| CN112501502A (en) * | 2020-10-31 | 2021-03-16 | 日照宝华新材料有限公司 | Hot-rolled pickled thin plate strip and transverse fold control method thereof |
| CN114645195A (en) * | 2020-10-31 | 2022-06-21 | 日照宝华新材料有限公司 | Hot-rolled pickled sheet band without transverse crease defect |
| CN114645195B (en) * | 2020-10-31 | 2023-01-31 | 日照宝华新材料有限公司 | Hot-rolled pickled sheet band without transverse crease defect |
| CN112501513A (en) * | 2020-11-30 | 2021-03-16 | 日照宝华新材料有限公司 | Low-carbon acid-pickled steel with excellent formability and surface quality and production method thereof |
| CN112501513B (en) * | 2020-11-30 | 2022-05-13 | 日照宝华新材料有限公司 | Low-carbon acid-pickled steel with excellent formability and surface quality and production method thereof |
| CN115505817A (en) * | 2021-06-07 | 2022-12-23 | 上海梅山钢铁股份有限公司 | Production method of low-thickness low-carbon B-containing hot rolled steel plate |
| CN115449712A (en) * | 2022-09-14 | 2022-12-09 | 浙江东南新材科技有限公司 | High-strength pickled plate and preparation method thereof |
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