CN102277529A - High-strength high-tenacity ship plate steel and TMCP (Thermal Mechanical Control Process) production technology method thereof - Google Patents
High-strength high-tenacity ship plate steel and TMCP (Thermal Mechanical Control Process) production technology method thereof Download PDFInfo
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Abstract
The invention provides high-strength high-tenacity ship plate steel and a TMCP (Thermal Mechanical Control Process) production technology method thereof. The high-strength high-tenacity ship plate steel comprises the following components in percentage by weight: 0.04-0.08% of C, 0.15-0.40% of Si, 1.30-1.55% of Mn, less than or equal to 0.012% of P, less than or equal to 0.005% of S, 0.025-0.045% of Nb, 0.010-0.020% of Ti, 0.015-0.025% of Ni, 0.020-0.050% of Als, less than or equal to 0.007% of N and the balance of Fe and trace impurities. The invention also provides a ship plate steel plate and a preparation method thereof. The ship plate steel and the ship plate steel plate provided by the invention have low production cost, high production efficiency, stable product properties and small quality fluctuation.
Description
Technical field
The present invention relates to steel and preparation field thereof, relate in particular to a kind of high-intensity high-tenacity deck of boat steel and TMCP producing and manufacturing technique thereof.
Background technology
Ship structure steel plate is one of shipbuilding industry consumption maximum, steel grade various in style.Along with development of global economy, the integration process gradually deeply, the world shipping industry is to develop rapidly, the large-tonnage ships demand increases just year by year, high-level deck of boat steel demand is more and more.Deck of boat steel has the requirement height, and characteristics such as check strictness are one of high added value steel products, and each big manufacturer is put into an important position to the production of deck of boat steel.
TMCP (ThermoMechanicalControlProcess: be exactly in course of hot rolling hot mechanical CONTROL PROCESS), on the basis of control Heating temperature, rolling temperature and draught (ControlRolling), implement the technology general name of air cooling or controlled chilling and acceleration cooling (AcceleratedCooling) again.It is two stage rolling on rolling basically that general TMCP production technique is produced high-intensity high-tenacity deck of boat steel, and promptly the recrystallization zone is rolling rolling with the non-recrystallization district, carries out water-cooled then.Yet high-intensity high-tenacity deck of boat steel is had relatively high expectations to the control accuracy of water-cooled, and cooling wants evenly to guarantee whole steel plate template and uniform performance are preferably arranged.In the operation of rolling because surface of steel plate heat radiation is inhomogeneous, as end to end, limit portion temperature is lower, it is later that afterbody enters water-cooled, adds the generation of transformation stress in the water-cooled process, is difficult to guarantee that steel plate has the performance of good template and whole steel plate even after overcooling.If discharge is the same up and down for steel plate, reason owing to gravity, the speed of cooling of upper surface is greater than the speed of cooling of lower surface, thus the present invention from process of cooling, control steel plate up and down the roller table speed of water when size and steel plate are in water-cooling system guarantee that steel plate has good template and mechanical property uniformly.
Chinese invention patent 200910259321 discloses deck of boat steel with superstrength and impelling strength and preparation method thereof and has related to a kind of deck of boat composition of steel with superstrength and impelling strength and preparation method thereof on May 12nd, 2009.Component and weight percent thereof that this deck of boat ladle contains are respectively: C:0.03～0.05%; Si:0.20～0.30%; Mn:0.80～0.90%; Al:0.03～0.04%; Ni:1.6～1.8%; Cu:1.1～1.3%; Cr:0.4～0.6%; Mo:0.4～0.6%; Nb:0.03～0.05%; Ti:0.01～0.02%; P≤0.01%; The Fe of S≤0.005% and surplus and impurity.This method is: will the continuous casting steel billet identical with above-mentioned deck of boat steel constituent heat successively, insulation, hot rolling, form finished product deck of boat steel through thermal treatment again.Deck of boat steel of the present invention has good intensity and low-temperature flexibility coupling, mechanical property and welding property excellence, and manufacturing process is flexible, flexibility.The present invention is suitable in shipbuilding industry, and particularly intensity and low-temperature flexibility require harsh and have in the deck of boat manufacturing process of weldability to use.But added a large amount of Ni in this invention, also added alloying elements such as Cu, Cr, Mo simultaneously, increased the steel plate cost value greatly.
Summary of the invention
The technical problem to be solved in the present invention is to provide kind of deck of boat steel and deck of boat steel plate and preparation method thereof.Deck of boat steel provided by the invention and deck of boat steel plate production cost are low, the production efficiency height, and product performance are stable, and quality fluctuation is little.
In order to solve the prior art problem, the invention provides a kind of deck of boat steel, by weight percentage, comprise following component: C:0.04～0.08%; Si:0.15～0.40%; Mn:1.30～1.55%; P :≤0.012%; S :≤0.005%; Nb:0.025～0.045%; Ti:0.010～0.020%; Ni:0.015～0.025%; Als:0.020～0.050%; N :≤0.007%; All the other are Fe and trace impurity.
The present invention also provides a kind of deck of boat steel plate, and the thickness that is obtained after roughing, finish rolling by described deck of boat steel is that the thickness of described deck of boat steel plate is 10～50mm, the hot-rolled steel sheet of wide 1500mm～4150mm.
The present invention also provides a kind of preparation method of deck of boat steel plate, comprising:
A) smelt, obtain continuously cast bloom behind the continuous casting according to described deck of boat steel constituent;
B) described continuously cast bloom is carried out obtaining intermediate blank after roughing and the finish rolling;
C) described strip plate is cooled off fast, obtain deck of boat steel plate.
Preferably, step b) is specially:
B1) the thick continuously cast bloom of 250～300mm is heated to 1180 ℃～1220 ℃;
B2) continuously cast bloom after will heating carries out roughing, and the roughing start rolling temperature is 1100～1200 ℃, and intermediate blank thickness is 2.0H～5.0H after the roughing, and wherein H is a finished product thickness;
B2) intermediate blank that obtains after the roughing is carried out finish rolling, the finish rolling start rolling temperature is 840～980 ℃, and finishing temperature is 810～850 ℃.
Preferably, step c) is specially: the strip plate that obtains after the finish rolling is cooled off, and opening cold temperature is 780～840 ℃, and final cooling temperature is 540～600 ℃, and speed of cooling is 8～14 ℃/s, obtains deck of boat steel plate after the cooling.
Preferably, it is rolling that described roughing adopts four roll reversing rollers to come and go 4～7 passages, and start rolling temperature is 1100 ℃～1200 ℃, and the roughing end temp is 1060～1160 ℃.
Preferably, water-cooled is selected in described cooling for use, cool off who up and down the water ratio be 0.76～0.90, the water-cooled roll table accelerating is at 0.10～0.20m/s
2
Preferably, described finish rolling and roughing all use 4～7 times rolling.
Preferably, the thickness of described deck of boat steel plate is 10～50mm,
A kind of hull that uses described deck of boat steel.
The inventive method is controlled between 1180 ℃～1220 ℃ the continuously cast bloom heating, is no less than 300min heat-up time, for the steel grade alloying element obtains abundant solid solution and effectively eliminates the banded structure that is caused by the chemical ingredients segregation.By rational controlled rolling process, the strict control intermediate blank thickness and the temperature in finish rolling stage, accurately water yield ratio about controlled chilling speed and the steel plate is guaranteed when obtaining needed steel plate tissue, guarantees that steel plate has good template; It is poor with steel billet temperature end to end to reduce by control roller table speed acceleration magnitude, realizes steel plate refrigerative homogeneity.The final production that realizes high strength, high low-temperature flexibility deck of boat steel plate; Yield strength is all reached more than the 390MPa, and tensile strength is all above 510MPa, and unit elongation is greater than 20%, and-60 ℃ of ballistic works are greater than 150J, and clod wash is qualified.This technological operation is easy, one-heating forming, and less energy consumption, production cost is low, and plate quality is good, has reduced the waste that causes because of template is bad, has improved lumber recovery.
Description of drawings
The deck of boat surface of steel plate metal structure microgram that Fig. 1, the embodiment of the invention 1 provide;
The deck of boat surface of steel plate metal structure Electronic Speculum figure that Fig. 2, the embodiment of the invention 1 provide;
The deck of boat steel plate 1/4 thickness place metal structure microgram that Fig. 3, the embodiment of the invention 1 provide;
The deck of boat steel plate 1/4 metal structure Electronic Speculum figure of thickness place that Fig. 4, the embodiment of the invention 1 provide;
The deck of boat steel plate 1/2 thickness place metal structure microgram that Fig. 5, the embodiment of the invention 1 provide;
The deck of boat steel plate 1/2 metal structure Electronic Speculum figure of thickness place that Fig. 6, the embodiment of the invention 1 provide.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiments of the invention are described, but should be appreciated that just restriction of these descriptions for further specifying the features and advantages of the present invention rather than patent of the present invention being required.
The invention provides a kind of deck of boat steel, by weight percentage, comprise following component: C:0.04～0.08%; Si:0.15～0.40%; Mn:1.30～1.55%; P :≤0.012%; S :≤0.005%; Nb:0.025～0.045%; Ti:0.010～0.020%; Ni:0.015～0.025%; Als:0.020～0.050%; N :≤0.007%; All the other are Fe and trace impurity.
Deck of boat steel provided by the invention does not use alloying elements such as Cr, Mo, Cu, in the cost that has reduced deck of boat steel, has added N, Als, has guaranteed the performance of deck of boat steel.
The present invention also provides a kind of deck of boat steel plate, and a kind of preparation method of deck of boat steel plate, comprising:
The thickness that is obtained after roughing, finish rolling by described deck of boat steel is that the thickness of described deck of boat steel plate is 10～50mm, the hot-rolled steel sheet of wide 1500mm～4150mm.
The preparation method of deck of boat steel plate comprises:
A) smelt, obtain continuously cast bloom behind the continuous casting according to described deck of boat steel constituent;
B) described continuously cast bloom is carried out obtaining intermediate blank after roughing and the finish rolling;
C) described strip plate is cooled off fast, obtain deck of boat steel plate.
Further preferred processing condition are as follows:
1, roughing
It is rolling that roughing adopts four roll reversing rollers to come and go 4～7 passages, start rolling temperature is preferably 1100 ℃～1200 ℃, temperature when steel is thrown in roughing is between 1060 ℃～1160 ℃ (roughing extreme trace time temperature), the single pass draft of last 3 passages of roughing otherwise less than 15%.
2, intermediate blank thickness
Deck of boat steel plate thickness is between 10～16mm the time, and intermediate blank thickness is preferably 4.0H (H is a deck of boat steel plate thickness); When deck of boat steel plate thickness was 16～25mm, intermediate blank thickness was preferably 3.5H; When product thickness was 25～40mm, intermediate blank thickness was preferably 3.0H; When deck of boat steel plate thickness was 40～50mm, intermediate blank thickness was preferably 2.5H.Suitably regulate intermediate blank thickness, depressing of austenite recrystallization stage and non-recrystallization stage carried out properly distributed, thus the advantage of performance controlled rolling process, and it is tiny to obtain crystal grain, well behaved thick steel plates product.
3, finish rolling
Controlled rolling is adopted in finish rolling, and when deck of boat steel plate thickness was 10～16mm, the finish rolling start rolling temperature was 960～980 ℃, and finishing temperature is controlled to be 810～840 ℃; When deck of boat steel plate thickness was 16～25mm, the finish rolling start rolling temperature was 910～930 ℃, and finishing temperature is controlled to be 810～840 ℃; When deck of boat steel plate thickness was 25～40mm, the finish rolling start rolling temperature was 880～900 ℃, and finishing temperature is controlled to be 810～840 ℃; When deck of boat steel plate thickness was 40～50mm, the finish rolling start rolling temperature was 860～880 ℃, and finishing temperature is controlled to be 820～850 ℃.
4, cooling
When steel plate entered water-cooling system, roller-way kept quickening operation, reduces the afterbody steel plate air cooling time.When deck of boat steel plate thickness is 10～16mm, opens cold temperature and be preferably 780～810 ℃, final cooling temperature is preferably 560～600 ℃, and speed of cooling is preferably 10～14 ℃/s, and the water ratio is preferably 0.85～0.88, and roll table accelerating is preferably 0.17～0.18m/s
2
When deck of boat steel plate thickness is 16～25mm, open cold temperature and be preferably 790～820 ℃, final cooling temperature is preferably 560～600 ℃, and speed of cooling is preferably 10～14 ℃/s, speed of cooling is preferably water and selects 0.83～0.86 than preferential, and roll table accelerating is preferably 0.15～0.16m/s
2
When deck of boat steel plate thickness is 25～40m, opens cold temperature and be preferably 790～830 ℃, final cooling temperature is preferably 540～580 ℃, and speed of cooling is preferably 8～12 ℃/s, and water selects 0.81～0.84 than preferential, and roll table accelerating is preferably 0.13～0.14m/s
2
When deck of boat steel plate thickness is 40～50m, opens cold temperature and be preferably 790～840 ℃, final cooling temperature is preferably 540～580 ℃, and speed of cooling is preferably 8～12 ℃/s, and water selects 0.78～0.82 than preferential, and roll table accelerating is preferably 0.11～0.12m/s
2
The inventive method is controlled between 1180 ℃～1220 ℃ the continuously cast bloom heating, is no less than 300min heat-up time, for the steel grade alloying element obtains abundant solid solution and effectively eliminates the banded structure that is caused by the chemical ingredients segregation.By rational controlled rolling process, the strict control intermediate blank thickness and the temperature in finish rolling stage, accurately water yield ratio about controlled chilling speed and the steel plate is guaranteed when obtaining needed steel plate tissue, guarantees that steel plate has good template; It is poor with steel billet temperature end to end to reduce by control roller table speed acceleration magnitude, realizes steel plate refrigerative homogeneity.The final production that realizes high strength, high low-temperature flexibility deck of boat steel plate; Yield strength is all reached more than the 390MPa, and tensile strength is all above 510MPa, and unit elongation is greater than 20%, and-60 ℃ of ballistic works are greater than 150J, and clod wash is qualified.This technological operation is easy, one-heating forming, and less energy consumption, production cost is low, and plate quality is good, has reduced the waste that causes because of template is bad, has improved lumber recovery.
Below will set forth the present invention program with specific embodiment:
The thick FH40 deck of boat of embodiment 1:10mm steel industrial production
Converter smelting FH40 deck of boat steel, the weight percent of the chemical ingredients of steel is: C:0.05%, Si:0.36%, Mn:1.38%, S:0.002%, P:0.011%, Nb:0.033%, Ni:0.19%, Ti:0.018%, Als:0.028, N:0.006, with conventional continuous cast method steel is cast into the thick continuous casting steel billet of 250mm, slab is delivered on the 4300mm wide and heavy plate mill and is rolled, and heating, the rolling whole process of carrying out are controlled.
The hot rolling technology controlling and process is as follows:
Control continuous casting steel billet heating tapping temperature is 1193 ℃; Slab carries out roughing at 1170 ℃, and it is rolling that roughing adopts 6 passages to come and go, and it is 1141 ℃ that roughing finishes back steel temperature; Intermediate blank thickness is 40mm after the roughing; D, finish rolling start rolling temperature are 996 ℃; It is rolling that e, finish rolling adopt 5 passages to come and go; G, finish rolling end temp are 838 ℃; Opening cold temperature is 801 ℃, and final cooling temperature is 591 ℃, and speed of cooling is 13 ℃/s, and the water ratio is 0.88 up and down, and roll table accelerating is 0.18m/s
2
The rigidity of present embodiment can be listed in the table 1.Performance test methods adopts international method.
The thick FH40 deck of boat of embodiment 2:20mm steel industrial production
Converter smelting FH40 deck of boat steel, the weight percent of the chemical ingredients of steel is: C:0.06%, Si:0.32%, Mn:1.43%, S:0.003%, P:0.010%, Nb:0.031%, Ni:0.21%, Ti:0.016%, Als:0.032, N:0.005, with conventional continuous cast method steel is cast into the thick continuous casting steel billet of 250mm, slab is delivered on the 4300mm wide and heavy plate mill and is rolled, and heating, the rolling whole process of carrying out are controlled.
The hot rolling technology controlling and process is as follows:
A, control continuous casting steel billet heating tapping temperature are 1193 ℃; B, slab carry out roughing at 1171 ℃, and it is rolling that roughing adopts 6 passages to come and go, and it is 1105 ℃ that roughing finishes back steel temperature.Intermediate blank thickness is 70mm after the roughing; D, finish rolling start rolling temperature are 921 ℃; It is rolling that e, finish rolling adopt 6 passages to come and go; G, finish rolling end temp are 826 ℃; Opening cold temperature is 808 ℃, and final cooling temperature is 587 ℃, and speed of cooling is 12 ℃/s, and the water ratio is 0.85 up and down, and roll table accelerating is 0.16m/s
2
The rigidity of present embodiment can be listed in the table 1.Performance test methods adopts international method.
The thick FH40 deck of boat of embodiment 3:35mm steel industrial production
Converter smelting FH40 deck of boat steel, the weight percent of the chemical ingredients of steel is: C:0.08%, Si:0.33%, Mn:1.41%, S:0.002%, P:0.008%, Nb:0.033%, Ni:0.23%, Ti:0.018%, Als:0.031, N:0.002, with conventional continuous cast method steel is cast into the thick continuous casting steel billet of 250mm, slab is delivered on the 4300mm wide and heavy plate mill and is rolled, and heating, the rolling whole process of carrying out are controlled.
The hot rolling technology controlling and process is as follows:
A, control continuous casting steel billet heating tapping temperature are 1197 ℃; B, slab carry out roughing at 1173 ℃, and it is rolling that roughing adopts 6 passages to come and go, and it is 1115 ℃ that roughing finishes back steel temperature.Intermediate blank thickness is 105mm after the roughing; D, finish rolling start rolling temperature are 891 ℃; It is rolling that e, finish rolling adopt 6 passages to come and go; G, finish rolling end temp are 827 ℃; Opening cold temperature is 818 ℃, and final cooling temperature is 567 ℃, and speed of cooling is 10 ℃/s, and the water ratio is 0.82 up and down, and roll table accelerating is 0.13m/s
2
The rigidity of present embodiment can be listed in the table 1.Performance test methods adopts international method.
The thick FH40 deck of boat of embodiment 4:50mm steel industrial production
Converter smelting FH40 deck of boat steel, the weight percent of the chemical ingredients of steel is: C:0.08%, Si:0.36%, Mn:1.49%, S:0.002%, P:0.008%, Nb:0.037%, Ni:0.23%, Ti:0.017%, Als:0.036, N:0.003 are cast into the thick continuous casting steel billet of 300mm with conventional continuous cast method with steel, slab is delivered on the 4300mm wide and heavy plate mill and is rolled, and heating, the rolling whole process of carrying out are controlled.
The hot rolling technology controlling and process is as follows:
A, control continuous casting steel billet heating tapping temperature are 1188 ℃; B, slab carry out roughing at 1157 ℃, and it is rolling that roughing adopts 6 passages to come and go, and it is 1111 ℃ that roughing finishes back steel temperature.Intermediate blank thickness is 125mm after the roughing; D, finish rolling start rolling temperature are 874 ℃; It is rolling that e, finish rolling adopt 6 passages to come and go; G, finish rolling end temp are 838 ℃; Opening cold temperature is 821 ℃, and final cooling temperature is 541 ℃, and speed of cooling is 9 ℃/s, and the water ratio is 0.79 up and down, and roll table accelerating is 0.11m/s
2。
The rigidity of present embodiment can be listed in the table 1.Performance test methods adopts international method.
Table 1: the mechanical property of the high-intensity high-tenacity deck of boat steel of embodiment of the invention preparation
As can be seen from the above table, the special thick high-strength ship plates of the present invention's preparation satisfies each surveying society's standard-required fully, and bigger performance surplus capacity is arranged.
Drawings attached 1 to Fig. 3 as can be seen, steel plate is organized as sago cycas body+perlite, surface layer grain has the elongation phenomenon, this is subjected to from relevant greatly to tensile stress with the steel plate top layer, thickness of slab 1/4 and 1/2 place's crystal grain do not have to find the phenomenon be elongated.Whole thickness of slab direction crystal grain is comparatively tiny evenly, for the performance of steel plate provides the favorable tissue basis.
More than a kind of deck of boat steel provided by the invention and deck of boat steel plate and preparation method thereof are described in detail; having used specific case herein sets forth principle of the present invention and embodiment; the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. a deck of boat steel is characterized in that, by weight percentage, comprises following component: C:0.04～0.08%; Si:0.15～0.40%; Mn:1.30～1.55%; P :≤0.012%; S :≤0.005%; Nb:0.025～0.045%; Ti:0.010～0.020%; Ni:0.015～0.025%; Als:0.020～0.050%; N :≤0.007%; All the other are Fe and trace impurity.
2. a deck of boat steel plate is characterized in that, the thickness that is obtained after roughing, finish rolling by the described deck of boat steel of claim 1 is that the thickness of described deck of boat steel plate is 10～50mm, the hot-rolled steel sheet of wide 1500mm～4150mm.
3. the preparation method of a deck of boat steel plate is characterized in that, comprising:
A) smelt, obtain continuously cast bloom behind the continuous casting according to the described component of claim 1;
B) described continuously cast bloom is carried out obtaining intermediate blank after roughing and the finish rolling;
C) described strip plate is cooled off fast, obtain deck of boat steel plate.
4. preparation method according to claim 3 is characterized in that step b) is specially:
B1) the thick continuously cast bloom of 250～300mm is heated to 1180 ℃～1220 ℃;
B2) continuously cast bloom after will heating carries out roughing, and the roughing start rolling temperature is 1100～1200 ℃, and intermediate blank thickness is 2.0H～5.0H after the roughing, and wherein H is a finished product thickness;
B2) intermediate blank that obtains after the roughing is carried out finish rolling, the finish rolling start rolling temperature is 840～980 ℃, and finishing temperature is 810～850 ℃.
5. preparation method according to claim 3 is characterized in that step c) is specially: the strip plate that obtains after the finish rolling is cooled off, opening cold temperature is 780～840 ℃, final cooling temperature is 540～600 ℃, and speed of cooling is 8～14 ℃/s, obtains deck of boat steel plate after the cooling.
6. preparation method according to claim 3 is characterized in that it is rolling that described roughing adopts four roll reversing rollers to come and go 4～7 passages, and start rolling temperature is 1100 ℃～1200 ℃, and the roughing end temp is 1060～1160 ℃.
7. preparation method according to claim 5 is characterized in that water-cooled is selected in described cooling for use, cool off who up and down the water ratio be 0.76～0.90, the water-cooled roll table accelerating is at 0.10～0.20m/s
2
8. preparation method according to claim 3 is characterized in that, described finish rolling and roughing all use 4～7 times rolling.
9. preparation method according to claim 3 is characterized in that, the thickness of described deck of boat steel plate is 10～50mm,
10. hull that uses the described deck of boat steel of claim 1.
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| CN105018838A (en) * | 2015-07-23 | 2015-11-04 | 舞阳钢铁有限责任公司 | Large, thick, high-strength and high-toughness TMCP type steel plate and production method thereof |
| CN105112782A (en) * | 2015-09-16 | 2015-12-02 | 南京钢铁股份有限公司 | Low-temperature ferrite LT-FH40 steel plate applied to hot-rolled ships and production method thereof |
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| CN109759445A (en) * | 2019-01-25 | 2019-05-17 | 舞阳钢铁有限责任公司 | Control the production method of TMCP shape steel plate performance difference end to end |
| CN111945064A (en) * | 2020-07-31 | 2020-11-17 | 山东钢铁股份有限公司 | 355 MPa-level low-temperature-resistant hot-rolled H-shaped steel for ocean engineering and preparation method thereof |
| CN112280958A (en) * | 2020-10-29 | 2021-01-29 | 江苏沙钢集团有限公司 | Method for reducing rolling temperature difference of ultra-long TMCP (thermal mechanical control processing) plate |
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| CN103627868A (en) * | 2013-11-29 | 2014-03-12 | 内蒙古包钢钢联股份有限公司 | Production method for improving toughness of 10-12mm thick steel plate with yield strength of 345MPa grade |
| CN105018838B (en) * | 2015-07-23 | 2017-05-17 | 舞阳钢铁有限责任公司 | Large, thick, high-strength and high-toughness TMCP type steel plate and production method thereof |
| CN105018838A (en) * | 2015-07-23 | 2015-11-04 | 舞阳钢铁有限责任公司 | Large, thick, high-strength and high-toughness TMCP type steel plate and production method thereof |
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| CN109642285A (en) * | 2016-08-29 | 2019-04-16 | 株式会社神户制钢所 | Thick steel plate and its manufacturing method |
| CN108517463A (en) * | 2018-04-11 | 2018-09-11 | 东北大学 | A kind of FH500 grade ship steels of high ductibility and preparation method thereof |
| CN109759445A (en) * | 2019-01-25 | 2019-05-17 | 舞阳钢铁有限责任公司 | Control the production method of TMCP shape steel plate performance difference end to end |
| CN111945064A (en) * | 2020-07-31 | 2020-11-17 | 山东钢铁股份有限公司 | 355 MPa-level low-temperature-resistant hot-rolled H-shaped steel for ocean engineering and preparation method thereof |
| WO2022022040A1 (en) * | 2020-07-31 | 2022-02-03 | 山东钢铁股份有限公司 | Low temperature-resistant hot-rolled h-type steel for 355mpa marine engineering and preparation method therefor |
| CN112280958A (en) * | 2020-10-29 | 2021-01-29 | 江苏沙钢集团有限公司 | Method for reducing rolling temperature difference of ultra-long TMCP (thermal mechanical control processing) plate |
| CN114410895A (en) * | 2021-12-29 | 2022-04-29 | 舞阳钢铁有限责任公司 | Method for reducing quenching deformation of alloy steel |
| CN114410895B (en) * | 2021-12-29 | 2024-01-23 | 舞阳钢铁有限责任公司 | Method for reducing quenching deformation of alloy steel |
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