CN104014590B - By the method for the 300mm heavy slab rolling 8mm-10mm deck of boat - Google Patents
By the method for the 300mm heavy slab rolling 8mm-10mm deck of boat Download PDFInfo
- Publication number
- CN104014590B CN104014590B CN201410221737.6A CN201410221737A CN104014590B CN 104014590 B CN104014590 B CN 104014590B CN 201410221737 A CN201410221737 A CN 201410221737A CN 104014590 B CN104014590 B CN 104014590B
- Authority
- CN
- China
- Prior art keywords
- slab
- minutes
- rolling
- cogging
- boat
- Prior art date
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of method of the 300mm heavy slab rolling 8mm-10mm deck of boat, comprising: 300mm heavy slab heats, then heating process comprises bringing-up section and soaking zone again; 300mm heavy slab will be heated again from cogging to 200mm thickness, no more than 3 passages of rolling pass number after dephosphorization; Split 200mm after cool to room temperature from cogging, heat the 200mm heavy slab after segmentation, then heating process comprises bringing-up section and soaking zone, total rethermalization time is 250-350 minute, and during heating, slab translational speed presses control in 10-20 minute/centimetre of again; After dephosphorization, deliver to milling train be rolled, rolling comprises truing phase, broadening stage and high temperature and extends stage, thermal straightening.The present invention adopts the thick stock size slab of 300mm can steady production 8mm-10mm Ultra-thin ship plate.
Description
Technical field
The present invention relates to a kind of hot rolled steel plate technology, specifically, relate to a kind of method of the 300mm heavy slab rolling 8mm-10mm guaranteed cost Thin Specs deck of boat.
Background technology
Deck of boat specification is complicated, and strict to performance requirement.In actual production, slab thickness, width, length dimension are generally limited, and during with the 300mm heavy slab rolling 8mm-10mm Thin Specs deck of boat, because size of plate blank often causes finished steel plate overlength comparatively greatly, cannot normally produce.Factory generally carries out from cogging 300mm heavy slab, is then divided into less slab by from cogging, less slab is rolled down to finished product thickness.But it is defective from the improper low-temperature impact toughness of finished steel plate performance inconsistency lattice, particularly steel plate that often causes of cogging technics.
The patent document of number of patent application 201110047688.5 discloses a kind of method of the rolling thin specification steel plate based on steekle mill, due to process structure different the method and be not suitable for common double frame four-high mill, and in this patent, slab is only 150mm.
The patent document of number of patent application 201310243537.6 discloses a kind of method of rolling thin specification steel plate, but this patent only lays particular emphasis on the plate shape of steel plate, does not pay close attention to the performance of finished steel plate.
The patent document of number of patent application 201310083305.9 discloses a kind of production method of Ultra-thin ultrahigh-strength steel plates, due to process structure different the method and be not suitable for common double frame four-high mill.
At present in disclosed patent, utilize comparatively heavy slab to produce thin specification steel plate majority and see hot continuous rolling production line and steekle mill production line.Report is there is not yet by heavy slab rolling steel-sheet case based on Stand Mill four-high mill production line.
Summary of the invention
Technical problem solved by the invention is to provide one, and by the method for the 300mm heavy slab rolling 8mm-10mm deck of boat, the thick stock size slab of employing 300mm can steady production 8mm-10mm Ultra-thin ship plate.
Technical scheme is as follows:
A method for the 300mm heavy slab rolling 8mm-10mm deck of boat, comprising:
300mm heavy slab heats again, heating-up temperature is 1180-1220 DEG C again, then heating process comprises bringing-up section and soaking zone, and total rethermalization time is 250-350 minute, during heating, slab translational speed presses control in 10-20 minute/centimetre of, and wherein the soaking zone time is 30-60 minute;
To heat 300mm heavy slab after dephosphorization again from cogging to 200mm thickness, start rolling temperature is 1160-1200 DEG C, no more than 3 passages of rolling pass number;
200mm is split from cogging after cool to room temperature, 200mm heavy slab after segmentation is heated again, heating-up temperature is 1180-1220 DEG C again, heating process comprises bringing-up section and soaking zone again, total rethermalization time is 250-350 minute, during heating, slab translational speed presses control in 10-20 minute/centimetre of, and wherein the soaking zone time is 30-60 minute;
To heating the dephosphorization of 200mm heavy slab again, delivering to milling train and being rolled after dephosphorization, rolling comprises truing phase, broadening stage and high temperature and extends the stage, and start rolling temperature is 1160-1200 DEG C;
Carry out thermal straightening to steel plate after rolling, straightening temperature is greater than 1000 DEG C, 20-30 DEG C lower than whole cold red temperature.
Further: employing multi-pass is aligned and aligning passage is no more than 3 passages, and steel plate unevenness reaches≤6mm/2m.
Further: dephosphorization adopts dephosphorize by high pressure water, and dephosphorization pressure is not less than 18MPa ~ 25MPa.
Further: the chemical composition of 300mm heavy slab and content are according to weight percent meter, comprise: C0.07-0.10%, Si0.30-0.40%, Mn1.50-1.70%, P≤0.015%, S≤0.005%, Als0.020-0.030%, Nb0.040-0.060%, V0.050-0.070%, Ti0.010-0.015%, surplus is Fe and impurity.
Further: the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of 300mm heavy slab and content are according to weight percent meter, comprise: C0.07%, Si0.40%, Mn1.55%, P0.011%, S0.005%, Als0.020%, Nb0.059%, V0.061%, Ti0.010%, surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH32 deck of boat of thickness 8mm.
Further: the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content are according to weight percent meter, comprise: C0.08%, Si0.40%, Mn1.50%, P0.015%, S0.005%, Als0.030%, Nb0.060%, V0.050%, Ti0.015%, surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH32 deck of boat of thickness 9mm.
Further: the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content are according to weight percent meter, comprise: C0.10%, Si0.36%, Mn1.51%, P0.014%, S0.005%, Als (dissolved aluminum) 0.028%, Nb0.057%, V0.056%, Ti0.011%, surplus is Fe and inevitable impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH32 deck of boat of thickness 10mm.
Further: the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content are according to weight percent meter, comprise: C0.08%, Si0.35%, Mn1.70%, P0.015%, S0.003%, Als0.028%, Nb0.048%, V0.070%, Ti0.014%, surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH40 deck of boat of thickness 8mm.
Further: the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, and the heat time is 260 minutes, and soaking time is 40 minutes; The chemical composition of slab and content, according to weight percent meter, comprising: C0.09%, Si0.31%, Mn1.64%, P0.010%, S0.004%, Als0.027%, Nb0.040%, V0.066%, Ti0.012%, and surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH40 deck of boat of thickness 9mm.
Further: the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content are according to weight percent meter, comprise: C0.10%, Si0.30%, Mn1.62%, P0.013%, S≤0.005%, Als0.029%, Nb0.048%, V0.062%, Ti0.014%, surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH40 deck of boat of thickness 10mm.
Compared with prior art, the technology of the present invention effect comprises:
1, outstanding advantages of the present invention adopts 300mm thick stock size slab steady production 8mm-10mm Ultra-thin ship plate.Check, its excellent in mechanical performance through actual production, the mechanical property of the steel plate of each embodiment meets classification society rule's requirement completely.
2, remarkable economic and social benefits.Ton steel profit more than 500 yuan, produces 1000 tons of calculating, profitable about 50,000 yuan of year by annual.In addition, this product has filled up Baogang and municipal blank.
Accompanying drawing explanation
Fig. 1 is the metallograph of embodiment 1 finished steel plate in the present invention.
Detailed description of the invention
The present invention is based on Stand Mill four-high mill production line, adopt the process of the 300mm thickness stock size slab rolling 8mm-10mm deck of boat.The present invention, by appropriate design cogging technics, successfully develops the Thin Specs deck of boat.Can split slab again by first cogging on the one hand avoids finished steel plate oversize, also can be ensured the performance of finished steel plate on the other hand by rational cogging technics.
In the present invention, by the method for the 300mm heavy slab rolling 8mm-10mm guaranteed cost Thin Specs deck of boat, its production stage specifically comprises: and 300mm heavy slab heats again → and after cogging → slab segmentation → segmentation, slab heats → dephosphorization → rolling → thermal straightening → shearings → sampling to dephosphorization → slab again, inspection → finished product is put in storage.
Chemical composition and the content (percentage by weight) of the finished product 8mm-10mm guaranteed cost Thin Specs deck of boat can meet classification society rule's requirement.
Step 1:300mm heavy slab heats again;
When continuous casting of molten steel becomes base, temperature is cooled to spend cool to room temperature again 1200 from more than 1500 degree more, and slab heats and refers to that slab is elevated to degree more than 1200 from room temperature again, the heating process that temperature raises again.Slab again heating process carries out in pusher-type furnace or walking beam furnace.The formulation of heating-up temperature depends on the solubility of alloying element again.Heating process requires suitable temperature and rational time, promotes abundant dissolving and composition, the even tissue of alloying element.Generally, the solution temperature of alloying element carbon (nitrogen) compound is about 1150 DEG C-1200 DEG C.
In order to promote the abundant dissolving of alloying element carbon (nitrogen) compound, and consider on-the-spot actual production conditions, heating-up temperature more of the present invention is 1180-1220 DEG C, heating process comprises bringing-up section and soaking zone again, because bringing-up section slab internal-external temperature difference is very large, need finally to carry out soaking even to ensure board briquette.Total rethermalization time that slab heats again is 250-350 minute, and during heating, slab translational speed presses control in 10-20 minute/centimetre of, and wherein the soaking zone time is 30-60 minute.
The chemical composition of 300mm heavy slab and content (percentage by weight) are: C0.07-0.10%, Si0.30-0.40%, Mn1.50-1.70%, P≤0.015%, S≤0.005%, Als (dissolved aluminum) 0.020-0.030%, Nb0.040-0.060%, V0.050-0.070%, Ti0.010-0.015%, and surplus is Fe and inevitable impurity.
Slab thickness 300mm, to the not requirement of width, length, as long as meet finished size.
Step 2: dephosphorization;
Slab seriously can generate iron scale in surface in heating process again, and therefore, slab needs after coming out of the stove to carry out dephosphorization to eliminate its scale on surface.Slab adopts dephosphorize by high pressure water, requires that dephosphorization pressure is not less than 18MPa.Generally dephosphorization pressure is within 25MPa.
Step 3:300mm heavy slab is from cogging;
300mm heavy slab is delivered to roughing mill and is carried out from cogging after dephosphorization.Full axial rolling is carried out from the cogging stage, this stage will give full play to mill capacity, realizes powerful large pressure, 300mm heavy slab is rolled 200mm thick in cogging thickness with minimum road number of times, promotion austenite crystal repeatedly recrystallization, with crystal grain thinning, requires to be no more than 3 roads from cogging stage rolling road number of times.Start rolling temperature from the cogging stage of the present invention is 1160-1200 DEG C, no more than 3 passages of rolling pass number.Frame dephosphorization equipment must be taked to carry out dephosphorization from cogging stage open rolling first passage, follow-up rolling pass carries out dephosphorization flexibly depending on surface of steel plate situation, ensures plate surface quality.
Step 4:200mm is from the segmentation of cogging;
300mm heavy slab is after cogging to 200mm heavy slab, 200mm heavy slab need be carried out process of rolling off the production line, carry out being divided into several piece 200mm heavy slab Deng after slab cool to room temperature by modes such as gas flame cuttiug, the not requirement of block number, as long as size of plate blank can not cause finished steel plate oversize, and slab is easy to shove charge again.
Step 5:200mm heavy slab heats again;
Slab again heating process carries out in pusher-type furnace or walking beam furnace.The formulation of heating-up temperature depends on the solubility of alloying element again.Heating process requires suitable temperature and rational time, promotes abundant dissolving and composition, the even tissue of alloying element.Generally, the solution temperature of alloying element carbon (nitrogen) compound is about 1150 DEG C-1200 DEG C.In order to promote the abundant dissolving of alloying element carbon (nitrogen) compound, and consider on-the-spot actual production conditions, heating-up temperature more of the present invention is 1180-1220 DEG C, heating process comprises bringing-up section and soaking zone again, because bringing-up section slab internal-external temperature difference is very large, need finally to carry out soaking even to ensure board briquette.Total rethermalization time that slab heats again is 250-350 minute, and during heating, slab translational speed presses control in 10-20 minute/centimetre of, and wherein the soaking zone time is 30-60 minute.
Step 6: dephosphorization;
Slab seriously can generate iron scale in surface in heating process again, and therefore, slab needs after coming out of the stove to carry out dephosphorization to eliminate its scale on surface.Slab adopts dephosphorize by high pressure water, requires that dephosphorization pressure is not less than 18MPa.Generally dephosphorization pressure is within 25MPa.
Step 7: rolling;
Slab is delivered to milling train and is rolled after dephosphorization.Rolling is divided into three phases: truing phase, broadening stage and high temperature extend the stage.Truing phase eliminates the defect such as uneven of steel slab surface, and promotes that slab thickness is even, and this stage total reduction is about 10%, and a point 1-2 passage completes.Width of plate slab is mainly increased to finished width by the broadening stage, and this stage total reduction is depending on slab broadening degree, and a point 2-4 passage completes.It is generally acknowledged, truing phase and broadening stage can not produce obviously impact to plate property.High temperature extends the stage and will give full play to mill capacity, realizes powerful large pressure, with minimum road number of times by slab rolling to finished product thickness with crystal grain thinning.The start rolling temperature of rolling of the present invention is 1160-1200 DEG C.Rolling sequence open rolling first passage, turn steel after the first passage frame dephosphorization equipment must be taked to carry out dephosphorization, high temperature extend the stage carry out dephosphorization flexibly depending on surface of steel plate situation, ensure plate surface quality.
Step 9: thermal straightening;
Need to carry out thermal straightening process after steel plate rolling, to make steel plate, there is good profile, consider steel plates straightening difficulty and thermal straightening machine ability, require that steel plates straightening temperature is 400-1000 DEG C.If steel plate a time can not leveling, multi-pass can be adopted to align, but be no more than 3 passages in principle, steel plate unevenness reaches≤6mm/2m.The specification that steel plate after thermal straightening becomes to require by shearing aft-loaded airfoil.
Straightening temperature is greater than 1000 DEG C, and temperature is too high, and straightener cannot work, because straightener cooling itself is limited in one's ability, straightener can be scorched, and after the very high aligning of temperature, steel plate also can be out of shape, and loses the meaning of aligning.Temperature is too hard lower than 400 DEG C of steel plates, and thermal straightening machine is " rectifying motionless " limited in one's ability also.Straightening temperature determines primarily of steel plate final cooling temperature, just starts aligning after steel plate goes out ACC (acceleration cooling system) after about about 1 minute, general straightening temperature 20-30 DEG C lower than whole cold red temperature.
Step 10: the steel plate of finished product is sampled, checked.The finished product warehouse-in be up to the standards, delivery.
On the whole the invention is characterized in:
(1) finished steel plate thickness is 8mm-10mm;
(2) adopt 300mm thick stock size slab rolling Ultra-thin steel plate, can not produce the normal group of manufacturing enterprise and bring impact;
(3) there is strict demand to slab from the large soft reduction process in cogging stage, ensure that finished steel plate has good mechanical property;
Below in conjunction with embodiment, technical solution of the present invention will be further described.
Embodiment 1
The slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, and the heat time is 260 minutes, and soaking time is 40 minutes; The chemical composition of slab and content (percentage by weight) are: C0.07%, Si0.40%, Mn1.55%, P0.011%, S0.005%, Als (dissolved aluminum) 0.020%, Nb0.059%, V0.061%, Ti0.010%, and surplus is Fe and inevitable impurity.With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split thick for 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes.Be rolled into the EH32 deck of boat of thickness 8mm, detailed rolling mill practice is in table 1, and its mechanical property is in table 2.
As shown in Figure 1, be the metallograph of embodiment 1 finished steel plate in the present invention.
Seen by Fig. 1, steel plate be organized as ferritic-pearlitic, pearlite disperse, be uniformly distributed, generally speaking ferrite crystal grain is comparatively thin, becomes block-shape morphology, facilitates the lifting of steel plate toughness.
Embodiment 2
The slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, and the heat time is 260 minutes, and soaking time is 40 minutes; The chemical composition of slab and content (percentage by weight) are: C0.08%, Si0.35%, Mn1.70%, P0.015%, S0.003%, Als (dissolved aluminum) 0.028%, Nb0.048%, V0.070%, Ti0.014%, and surplus is Fe and inevitable impurity.With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split thick for 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes.Be rolled into the EH40 deck of boat of thickness 8mm, detailed rolling mill practice is in table 1, and its mechanical property is in table 2.
Embodiment 3
The slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, and the heat time is 260 minutes, and soaking time is 40 minutes; The chemical composition of slab and content (percentage by weight) are: C0.08%, Si0.40%, Mn1.50%, P0.015%, S0.005%, Als (dissolved aluminum) 0.030%, Nb0.060%, V0.050%, Ti0.015%, and surplus is Fe and inevitable impurity.With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split thick for 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes.Be rolled into the EH32 deck of boat of thickness 9mm, detailed rolling mill practice is in table 1, and its mechanical property is in table 2.
Embodiment 4
The slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, and the heat time is 260 minutes, and soaking time is 40 minutes; The chemical composition of slab and content (percentage by weight) are: C0.09%, Si0.31%, Mn1.64%, P0.010%, S0.004%, Als (dissolved aluminum) 0.027%, Nb0.040%, V0.066%, Ti0.012%, and surplus is Fe and inevitable impurity.With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split thick for 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes.Be rolled into the EH40 deck of boat of thickness 9mm, detailed rolling mill practice is in table 1, and its mechanical property is in table 2.
Embodiment 5
The slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, and the heat time is 260 minutes, and soaking time is 40 minutes; The chemical composition of slab and content (percentage by weight) are: C0.10%, Si0.36%, Mn1.51%, P0.014%, S0.005%, Als (dissolved aluminum) 0.028%, Nb0.057%, V0.056%, Ti0.011%, and surplus is Fe and inevitable impurity.With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split thick for 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes.Be rolled into the EH32 deck of boat of thickness 10mm, detailed rolling mill practice is in table 1, and its mechanical property is in table 2.
Embodiment 6
The slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content (percentage by weight) are: C0.10%, Si0.30%, Mn1.62%, P0.013%, S≤0.005%, Als (dissolved aluminum) 0.029%, Nb0.048%, V0.062%, Ti0.014%, and surplus is Fe and inevitable impurity.With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split thick for 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes.Be rolled into the EH40 deck of boat of thickness 10mm, detailed rolling mill practice is in table 1, and its mechanical property is in table 2.
The technological parameter of table 1 embodiment 1 ~ 4
The mechanical property of table 2 embodiment 1 ~ 4
Claims (10)
1., by a method for the 300mm heavy slab rolling 8mm-10mm deck of boat, comprising:
300mm heavy slab heats again, heating-up temperature is 1180-1220 DEG C again, then heating process comprises bringing-up section and soaking zone, and total rethermalization time is 250-350 minute, during heating, slab translational speed presses control in 10-20 minute/centimetre of, and wherein the soaking zone time is 30-60 minute;
To heat 300mm heavy slab after dephosphorization again from cogging to 200mm thickness, start rolling temperature is 1160-1200 DEG C, no more than 3 passages of rolling pass number;
200mm is split from cogging after cool to room temperature, 200mm heavy slab after segmentation is heated again, heating-up temperature is 1180-1220 DEG C again, heating process comprises bringing-up section and soaking zone again, total rethermalization time is 250-350 minute, during heating, slab translational speed presses control in 10-20 minute/centimetre of, and wherein the soaking zone time is 30-60 minute;
To heating the dephosphorization of 200mm heavy slab again, delivering to milling train and being rolled after dephosphorization, rolling comprises truing phase, broadening stage and high temperature and extends the stage, and start rolling temperature is 1160-1200 DEG C;
Carry out thermal straightening to steel plate after rolling, straightening temperature is greater than 1000 DEG C, 20-30 DEG C lower than whole cold red temperature.
2. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 1, it is characterized in that: employing multi-pass is aligned and aligning passage is no more than 3 passages, and steel plate unevenness reaches≤6mm/2m.
3. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 1, it is characterized in that: dephosphorization adopts dephosphorize by high pressure water, and dephosphorization pressure is not less than 18MPa ~ 25MPa.
4. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 1, it is characterized in that, the chemical composition of 300mm heavy slab and content are according to weight percent meter, comprise: C0.07-0.10%, Si0.30-0.40%, Mn1.50-1.70%, P≤0.015%, S≤0.005%, Als0.020-0.030%, Nb0.040-0.060%, V0.050-0.070%, Ti0.010-0.015%, surplus is Fe and impurity.
5. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 4, it is characterized in that, the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of 300mm heavy slab and content are according to weight percent meter, comprise: C0.07%, Si0.40%, Mn1.55%, P0.011%, S0.005%, Als0.020%, Nb0.059%, V0.061%, Ti0.010%, surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH32 deck of boat of thickness 8mm.
6. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 4, it is characterized in that, the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content, according to weight percent meter, comprising: C0.08%, Si0.40%, Mn1.50%, P0.015%, S0.005%, Als0.030%, Nb0.060%, V0.050%, Ti0.015%, and surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH32 deck of boat of thickness 9mm.
7. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 4, it is characterized in that, the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content are according to weight percent meter, comprise: C0.10%, Si0.36%, Mn1.51%, P0.014%, S0.005%, Als (dissolved aluminum) 0.028%, Nb0.057%, V0.056%, Ti0.011%, surplus is Fe and inevitable impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH32 deck of boat of thickness 10mm.
8. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 4, it is characterized in that, the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content, according to weight percent meter, comprising: C0.08%, Si0.35%, Mn1.70%, P0.015%, S0.003%, Als0.028%, Nb0.048%, V0.070%, Ti0.014%, and surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH40 deck of boat of thickness 8mm.
9. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 4, it is characterized in that, the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, and the heat time is 260 minutes, and soaking time is 40 minutes; The chemical composition of slab and content, according to weight percent meter, comprising: C0.09%, Si0.31%, Mn1.64%, P0.010%, S0.004%, Als0.027%, Nb0.040%, V0.066%, Ti0.012%, and surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH40 deck of boat of thickness 9mm.
10. use the method for the 300mm heavy slab rolling 8mm-10mm deck of boat as claimed in claim 4, it is characterized in that, the slab of the thick plan rolling of 300mm after smelting, continuous casting is put into heating furnace, heat time is 260 minutes, soaking time is 40 minutes, the chemical composition of slab and content, according to weight percent meter, comprising: C0.10%, Si0.30%, Mn1.62%, P0.013%, S≤0.005%, Als0.029%, Nb0.048%, V0.062%, Ti0.014%, and surplus is Fe and impurity; With 3 passages by thick to 200mm from cogging for 300mm heavy slab, split by 200mm from cogging, the shove charge again of the slab after segmentation, the heat time is 260 minutes, and soaking time is 40 minutes, is rolled into the EH40 deck of boat of thickness 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410221737.6A CN104014590B (en) | 2014-05-23 | 2014-05-23 | By the method for the 300mm heavy slab rolling 8mm-10mm deck of boat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410221737.6A CN104014590B (en) | 2014-05-23 | 2014-05-23 | By the method for the 300mm heavy slab rolling 8mm-10mm deck of boat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104014590A CN104014590A (en) | 2014-09-03 |
| CN104014590B true CN104014590B (en) | 2016-04-13 |
Family
ID=51431750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410221737.6A Withdrawn - After Issue CN104014590B (en) | 2014-05-23 | 2014-05-23 | By the method for the 300mm heavy slab rolling 8mm-10mm deck of boat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104014590B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876664B (en) * | 2020-06-19 | 2022-04-12 | 江阴兴澄特种钢铁有限公司 | Manufacturing method of 50CrVA hot-rolled wide spring steel plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290186A (en) * | 2013-06-14 | 2013-09-11 | 首钢总公司 | Manufacturing method of corrosion-proof steel plate used for crude oil tanker cargo oil hold inner bottom plate and steel plate |
| CN103789612A (en) * | 2012-11-02 | 2014-05-14 | 无锡市金荡机械厂 | Preparation method of bainite structural steel plate with yield strength exceeding 1,100MPa |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005296978A (en) * | 2004-04-08 | 2005-10-27 | Nippon Steel Corp | Method and equipment for manufacturing thick steel plate |
| JP2006000866A (en) * | 2004-06-15 | 2006-01-05 | Nippon Steel Corp | Method for straightening thick steel plate with scale |
-
2014
- 2014-05-23 CN CN201410221737.6A patent/CN104014590B/en not_active Withdrawn - After Issue
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789612A (en) * | 2012-11-02 | 2014-05-14 | 无锡市金荡机械厂 | Preparation method of bainite structural steel plate with yield strength exceeding 1,100MPa |
| CN103290186A (en) * | 2013-06-14 | 2013-09-11 | 首钢总公司 | Manufacturing method of corrosion-proof steel plate used for crude oil tanker cargo oil hold inner bottom plate and steel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104014590A (en) | 2014-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104525560B (en) | Effective control method of the 30mm cut deal pitted skins of straight carbon steel/Nb bearing steel 20 | |
| CN103757544B (en) | A kind of economical Micro Alloying microalloyed plastic-mould steel plate and manufacture method thereof | |
| CN102247985B (en) | Method for producing steel for stirring tank with limit specification through hot rolling | |
| CN101704026B (en) | Method for controlling pitting on surface of medium steel plate | |
| CN103484643B (en) | Method for preventing hot rolling edge fractures in oriented silicon steel | |
| CN105057356A (en) | Process for producing screw-thread steel through two-stage rolling control and after-rolling cooling control | |
| CN103469106B (en) | Directly produce big thickness rack steel plate and manufacture method thereof with continuous casting billet | |
| CN103741028B (en) | Low yield strength ratio low temperature weldless steel tube and production method thereof | |
| CN105177422B (en) | Ultra-long thin EH36 steel and production method of ultra-long thin EH36 steel on steckle mill | |
| CN101289732A (en) | Fine grain hot-rolled ribbed bar and method for preparing same | |
| CN102319734A (en) | Method for effectively controlling small pockmark defects on surface of medium plate | |
| CN104531964A (en) | Production method of high performance duplex stainless steel hot rolled coil | |
| KR102704654B1 (en) | Rolling method of high-strength, low-alloy steel | |
| WO2020228303A1 (en) | Method for producing crack arrest steel for container ship | |
| CN105755238A (en) | Rolling technology and heat treatment method of pre-hardening type plastic die steel | |
| CN109013711B (en) | A method of improving special heavy plate center portion quality and flaw detection qualification rate | |
| CN103317319A (en) | Production processing method for edge-digging scissors made of Cr12Mo1V1 | |
| CN104018060B (en) | The thick production method protecting flaw detection guaranteed cost Q345B steel plate of 150mm | |
| CN103643017B (en) | Improve the production method of yield strength 345MPa level Plate Steel toughness | |
| CN102151693A (en) | Method for rolling low-hardness small-sized spring steel | |
| CN105177423A (en) | Large-wall-thickness X65M pipeline steel plate and manufacturing method thereof | |
| CN104018063A (en) | Low alloy and high strength Q420C medium steel plate and production method thereof | |
| CN102534152A (en) | Rolling method capable of preventing pockmarks on surface of ship plate | |
| CN104014590B (en) | By the method for the 300mm heavy slab rolling 8mm-10mm deck of boat | |
| CN104801563A (en) | Preparation method of medium carbon non-quenched and tempered steel for crankshafts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160413 Effective date of abandoning: 20220712 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160413 Effective date of abandoning: 20220712 |