CN108405611A - Production method of super-thick homogeneous composite board - Google Patents
Production method of super-thick homogeneous composite board Download PDFInfo
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- CN108405611A CN108405611A CN201810147765.6A CN201810147765A CN108405611A CN 108405611 A CN108405611 A CN 108405611A CN 201810147765 A CN201810147765 A CN 201810147765A CN 108405611 A CN108405611 A CN 108405611A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000002131 composite material Substances 0.000 title claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 239000000498 cooling water Substances 0.000 claims abstract description 5
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000003801 milling Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000000227 grinding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- 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
-
- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a production method of an extra-thick homogeneous composite plate, which comprises the steps of welding, vacuumizing and heating 2-3 continuous casting blanks with the thickness of 250-300 mm, and controlling the in-furnace time to be 400-520 min; reducing the actual temperature of the lower surface by adopting a blowing mode 10-30 min before discharging, and controlling the temperature of the lower surface to be 50-100 ℃ lower than that of the upper surface; the rolling process requirements are as follows: the first 3 passes adopt a small reduction and slow rolling mode, the reduction is controlled within 10-25 mm, the set value of the biting speed of the rolling mill is kept consistent with the set value of the rolling speed, the set range is 2.0-4.5 m/s, and the broadening ratio is controlled between 1.0-1.45; the billet is widened for 3-7 times, wherein the lower surface of the billet is cooled by cooling water before the 3 rd pass, the 5 th pass and the initial rolling of longitudinal rolling, the cooling time is 50-100 s, and the single-pass reduction of the longitudinal rolling pass is more than 20 mm. The success rate of rolling the steel plate reaches 100%, the thickness of the product can be finally produced to be 440mm, and the flaw detection qualification rate exceeds 95%. The strength values meet the performance requirements, and the production cost of the steel billet is 50 percent lower than that of the steel ingot.
Description
Technical field
The present invention relates to steel plate manufacture, more particularly to the production method of a kind of special thick homojunction combined plate of 120mm or more thickness.
Background technology
In recent years, special heavy plate demand was increasing, in order to ensure that compression ratio, traditional handicraft are special thick using molding base production
The disadvantage that the mode of plate is shown is more and more obvious, on the one hand its not only the production cycle it is long, on the other hand also significantly increase
Production cost.With the development of vacuum complex technique, cut deal enterprise continues to optimize processing route and the mode of production, using continuous casting
Base carries out the compound mode of two layers/tri- layers of vacuum, is rolled into special heavy plate finished product through steel rolling mill, greatly reduces cost, reduces
Production cycle.
Invention content
Technical problem to be solved by the invention is to provide a kind of productions producing special thick homojunction combined plate using continuous casting billet
Method, intensity value meet low-alloy performance requirement, and bloom production is at low cost.
To achieve the above object, the present invention is realized using following technical scheme：
A kind of production method of special thick homojunction combined plate, including step in detail below：
1, blank composite demand：It is welded using 2~3 blocks of 250~300mm thickness continuous casting billets, and by gas in steel plate contact surface
It is evacuated to vacuum state；
2, heating requirements：After composite blank welding forming, heated using heating furnace, the control of heating total time 20~
32 hours, wherein low-temperature zone temperature was 600~800 DEG C, and time inside furnace is controlled in 450~600min；Bringing-up section temperature be 700~
1250 DEG C, in 350~800min, bringing-up section heating rate is 0.8 DEG C/s~2.0 DEG C/s for time inside furnace control；Equal temperature section temperature
At 1100~1250 DEG C, time inside furnace is controlled in 400~520min for control；10~30min is reduced using blowing mode before coming out of the stove
Lower surface actual temperature, control underlaying surface temperature are less than 50~100 DEG C of upper surface；
3, rolling mill practice requirement：Preceding 3 passage uses small pressure, rolling mode at a slow speed, drafts control 10~25mm with
It is interior, milling train biting speed setting value and mill speed setting value are consistent, setting range is 2.0~4.5m/s, broadening ratio
Control is between 1.0~1.45；Steel billet broadens 3~7 passages, wherein using cooling before the 3rd passage, the 5th passage and axial rolling open rolling
Water cooling lower surface, cooling time are 50~100s, are upwarped during control steel plate rolling, axial rolling rolling pass single pass
Drafts is in 20mm or more.
Compared with prior art, the beneficial effects of the invention are as follows：
Steel plate rolling success rate of the present invention reaches 100%, and product thickness can finally produce 440mm, and flaw detection qualification rate is more than
95%.Through service check, intensity value meets low-alloy performance requirement, bloom production cost low compared with steel ingot 50%.
Specific implementation mode
With reference to embodiment, the present invention is further described：
The present invention will be described in detail for following embodiment.These embodiments be only to preferred embodiment of the invention into
Row description, does not limit the scope of the present invention.
A kind of production method of special thick homojunction combined plate, including step in detail below：
1, blank composite demand：Low alloyed steel continuous casting base is made steel using 2~3 pieces of 250-300mm thickness, will be adopted after polishing steel plate
It is welded with four ribs of contact surface, and gas in steel plate contact surface is evacuated to vacuum state；
2, heating requirements：It after composite blank welding forming, is heated using batch-type furnace in 30 days, the control of heating total time
System was at 20~32 hours, and wherein low-temperature zone temperature is 600~800 DEG C, and time inside furnace is controlled in 450~600min；Bringing-up section temperature
Degree is 700~1250 DEG C, and in 350~800min, bringing-up section heating rate is 0.8 DEG C/s~2.0 DEG C/s for time inside furnace control；
At 1100~1250 DEG C, time inside furnace is controlled in 400~520min the control of temperature section temperature；10~30min is using blowing before coming out of the stove
Mode reduces lower surface actual temperature, and control underlaying surface temperature is less than 50~100 DEG C of upper surface；
3, rolling mill practice requirement：Preceding 3 passage uses small pressure, rolling mode at a slow speed, drafts control 10~25mm with
It is interior, milling train biting speed setting value and mill speed setting value are consistent, setting range is 2.0~4.5m/s, broadening ratio
Control is between 1.0~1.45；Steel billet broadens 3~7 passages, wherein using cooling before the 3rd passage, the 5th passage and axial rolling open rolling
Water cooling lower surface, cooling time are 50~100s, are upwarped during control steel plate rolling.After ensureing steel plate rolling
Shear strength, axial rolling rolling pass single pass rolling reduction should ensure that in 20mm or more.
Embodiment 1
Trimmed size：The production method of the special thick homojunction combined plates of 150*3500*9250mm, including step in detail below：
1, blank specification：250*2200*L；2 pieces of Q345C materials steel billet is chosen, billet surface is milled to by light using grinding machine
It is sliding, 2 blocks of steel plates are welded using four ribs of contact surface, and gas in steel plate contact surface is evacuated to vacuum state；
2, heating cycle：It heats total time 21h, preheating section temperature is 700 DEG C, keeps the temperature 8h；Bringing-up section temperature is risen by 700 DEG C
To 1200 DEG C, the heating-up time is 6h (average heating speed is 1.38 DEG C/min, and maximum heating rate is 1.46 DEG C/min)；Soaking
Duan Wendu is 1200 DEG C, soaking time 7h；
3, rolling mill practice：Preceding 3 passage uses small pressure, at a slow speed rolling mode, wherein the first reduction in pass is 10mm,
For the control of remaining reduction in pass within 15-25mm, milling train biting speed is set as 3.5m/s with mill speed when rolling, ensures steel
Roll-force and the stability of rolling torsion in the plate operation of rolling.Steel billet uses cooling water cooling before broadening the 3rd passage and axial rolling open rolling
But lower surface, water nozzle number are 3 groups, and cooling time, 60s, was upwarped, axial rolling passage single track in the process with controlling steel plate rolling
Secondary drafts ensures in 20~25mm.Steel plate finishing temperature is 880 DEG C.
Embodiment 2
Trimmed size：The production method of the special thick homojunction combined plates of 180*2800*8200mm, including step in detail below：
1, blank specification：250*1800*L；2 pieces of Q345B materials steel billet is chosen, billet surface is milled to by light using grinding machine
It is sliding, 2 blocks of steel plates are welded using four ribs of contact surface, and gas in steel plate contact surface is evacuated to vacuum state；
2, heating cycle：It heats total time 20h, preheating section temperature is 700 DEG C, keeps the temperature 6h；Bringing-up section temperature is risen by 700 DEG C
To 1230 DEG C, the heating-up time is 7h (average heating speed is 1.26 DEG C/min, and maximum heating rate is 1.40 DEG C/min)；Soaking
Duan Wendu is 1230 DEG C, soaking time 7h；
3, rolling mill practice：Preceding 3 passage uses small pressure, at a slow speed rolling mode, wherein the first reduction in pass is 12mm,
For the control of remaining reduction in pass within 15-20mm, milling train biting speed is set as 3.0m/s with mill speed when rolling, ensures steel
Roll-force and the stability of rolling torsion in the plate operation of rolling.Steel billet uses before broadening the 3rd passage, the 5th passage and axial rolling open rolling
Cooling water cooling lower surface, water nozzle number are 3 groups, and cooling time, 50s, was upwarped, axial rolling in the process with controlling steel plate rolling
Passage single pass rolling reduction ensures in 20~25mm.Steel plate finishing temperature is 850 DEG C.
Embodiment 3
Trimmed size：The production method of the special thick homojunction combined plates of 200*3200*11000mm, including step in detail below：
1, blank specification：300*1800*L；2 pieces of Q345B materials steel billet is chosen, billet surface is milled to by light using grinding machine
It is sliding, 2 blocks of steel plates are welded using four ribs of contact surface, and gas in steel plate contact surface is evacuated to vacuum state；
2, heating cycle：It heats total time 23h, preheating section temperature is 650 DEG C, keeps the temperature 8h；Bringing-up section temperature is risen by 650 DEG C
To 1220 DEG C, the heating-up time is 9h (average heating speed is 1.06 DEG C/min, and maximum heating rate is 1.25 DEG C/min)；Soaking
Duan Wendu is 1220 DEG C, soaking time 8h；
3, rolling mill practice：Preceding 3 passage uses small pressure, at a slow speed rolling mode, wherein the first reduction in pass is 10mm,
For the control of remaining reduction in pass within 15-20mm, milling train biting speed is set as 2.5m/s with mill speed when rolling, ensures steel
Roll-force and the stability of rolling torsion in the plate operation of rolling.Steel billet uses before broadening the 3rd passage, the 5th passage and axial rolling open rolling
Cooling water cooling lower surface, water nozzle number are 3 groups, and cooling time, 80s, was upwarped, axial rolling in the process with controlling steel plate rolling
Passage single pass rolling reduction ensures in 20~25mm.Steel plate finishing temperature is 850 DEG C.
Embodiment 1-3 mechanical property of steel plate is shown in Table 1；
Table 1：
Claims (2)
1. a kind of production method of special thick homojunction combined plate, which is characterized in that including step in detail below：
1) blank composite demand：It is welded using 2~3 blocks of 250~300mm thickness continuous casting billets, and gas in steel plate contact surface is evacuated to
Vacuum state；
2) heating requirements：It after composite blank welding forming, is heated using heating furnace, the control of heating total time is small 20~32
When, wherein low-temperature zone temperature is 600~800 DEG C, and time inside furnace is controlled in 450~600min；Bringing-up section temperature is 700~1250
DEG C, in 350~800min, bringing-up section heating rate is 0.8 DEG C/s~2.0 DEG C/s for time inside furnace control；Equal temperature section temperature control
At 1100~1250 DEG C, time inside furnace is controlled in 400~520min；10~30min reduces following table using blowing mode before coming out of the stove
Face actual temperature, control underlaying surface temperature are less than 50~100 DEG C of upper surface；
3) rolling mill practice requirement：Preceding 3 passage is controlled using small pressure, at a slow speed rolling mode, drafts within 10~25mm, will
Milling train biting speed setting value is consistent with mill speed setting value, and setting range is 2.0~4.5m/s, and broadening ratio control exists
Between 1.0~1.45；Steel billet broadens 3~7 passages, wherein using cooling water cooling before the 3rd passage, the 5th passage and axial rolling open rolling
Lower surface, cooling time are 50~100s, are upwarped during control steel plate rolling, axial rolling rolling pass single pass rolling reduction
In 20mm or more.
2. a kind of production method of special thick homojunction combined plate according to claim 1, which is characterized in that homojunction combined plate
Thickness is in 120mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147765.6A CN108405611A (en) | 2018-02-13 | 2018-02-13 | Production method of super-thick homogeneous composite board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147765.6A CN108405611A (en) | 2018-02-13 | 2018-02-13 | Production method of super-thick homogeneous composite board |
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| Publication Number | Publication Date |
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| CN108405611A true CN108405611A (en) | 2018-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810147765.6A Pending CN108405611A (en) | 2018-02-13 | 2018-02-13 | Production method of super-thick homogeneous composite board |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482457A (en) * | 2020-04-08 | 2020-08-04 | 鞍钢股份有限公司 | Thin material rolling method for high-carbon steel tandem rolling blank |
| CN111687234A (en) * | 2020-05-06 | 2020-09-22 | 山西太钢不锈钢股份有限公司 | Method for manufacturing stainless steel extra-thick plate |
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|---|---|---|---|---|
| CN105274433A (en) * | 2014-07-16 | 2016-01-27 | 鞍钢股份有限公司 | Super-thick steel plate and composite production method thereof |
| CN105312842A (en) * | 2014-07-16 | 2016-02-10 | 鞍钢股份有限公司 | Manufacturing method of super-thick steel plate with excellent Z-direction performance |
| CN105710152A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Production method of steel plate for ultra-thick hydrogen-contacting equipment |
| CN105855685A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | Method for producing extra-thick plate by vacuum electron beam horizontal hybrid welding |
| CN106694549A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Production method of super-thick carbon die steel plate |
| CN106695102A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Vacuum electronic welding method for ferromagnetic steel ultra-thick composite plate |
-
2018
- 2018-02-13 CN CN201810147765.6A patent/CN108405611A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274433A (en) * | 2014-07-16 | 2016-01-27 | 鞍钢股份有限公司 | Super-thick steel plate and composite production method thereof |
| CN105312842A (en) * | 2014-07-16 | 2016-02-10 | 鞍钢股份有限公司 | Manufacturing method of super-thick steel plate with excellent Z-direction performance |
| CN105710152A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Production method of steel plate for ultra-thick hydrogen-contacting equipment |
| CN105855685A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | Method for producing extra-thick plate by vacuum electron beam horizontal hybrid welding |
| CN106694549A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Production method of super-thick carbon die steel plate |
| CN106695102A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Vacuum electronic welding method for ferromagnetic steel ultra-thick composite plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482457A (en) * | 2020-04-08 | 2020-08-04 | 鞍钢股份有限公司 | Thin material rolling method for high-carbon steel tandem rolling blank |
| CN111482457B (en) * | 2020-04-08 | 2022-02-15 | 鞍钢股份有限公司 | Thin material rolling method for high-carbon steel tandem rolling blank |
| CN111687234A (en) * | 2020-05-06 | 2020-09-22 | 山西太钢不锈钢股份有限公司 | Method for manufacturing stainless steel extra-thick plate |
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