CN101921968A - Production method of steel-plate with specified dimensions for hull structure - Google Patents
Production method of steel-plate with specified dimensions for hull structure Download PDFInfo
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- CN101921968A CN101921968A CN 201010275269 CN201010275269A CN101921968A CN 101921968 A CN101921968 A CN 101921968A CN 201010275269 CN201010275269 CN 201010275269 CN 201010275269 A CN201010275269 A CN 201010275269A CN 101921968 A CN101921968 A CN 101921968A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 238000005096 rolling process Methods 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims abstract description 3
- 238000009749 continuous casting Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 9
- 238000005496 tempering Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000007669 thermal treatment Methods 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 230000003009 desulfurizing effect Effects 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 238000006477 desulfuration reaction Methods 0.000 abstract 1
- 230000023556 desulfurization Effects 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 229910052717 sulfur Inorganic materials 0.000 abstract 1
- 238000009489 vacuum treatment Methods 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- 229910001563 bainite Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000010955 niobium Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009377 nuclear transmutation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 description 1
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- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a production method of a steel-plate with specified dimensions for a hull structure. The production process comprises the steps of molten iron desulfurization, converter top and bottom blowing, vacuum treatment, continuous casting, controlled rolling and controlled cooling and heat treatment. The steel comprises the following components in percent by weight: 0.02-0.1 percent by weight of C, 0.2-0.4 percent by weight of Si, 0.5-1.5 percent by weight of Mn, 0.02-0.04 percent by weight of Alt, 0.02-0.08 percent by weight of Nb, 0.005-0.1 percent by weight of V, 0.008-0.02 percent of Ti, 0.3-0.7 percent by weight of Cr, 0.2-0.5 percent by weight of Mo, 0.3-1.4 percent by weight of Ni, 0.2-1.2 percent by weight of Cu, 0.001-0.002 percent by weight of B, 0.013 percent of P, 0.005 percent of S, 0.0012 percent of O, 0.0045 percent of N, 0.0015 percent of H and the balance of inevitable impurities. By using the Mo-Cu-Nb-B compound action, the invention allows the steel plate to be endowed with high strength, high toughness and weldability under the condition that a small amount of other alloy elements are added.
Description
Technical field
The invention belongs to Hi-Stren steel and make the field, the thermal treatment of particularly a kind of TMCP+RQ+T(machinery is rolling+modified) processing method of the strong generous specification steel plate of production superelevation.
Background technology
Deck of boat steel will bear complicated dynamic load in-service, and in the construction and assembling process of boats and ships, structural part can produce huge stress, and the navigation of the world-wide of naval vessels will be born the test of position and temperature.In order to make boats and ships can under severe environment, continue navigation, simultaneously, consider from resource and environmental protection, for alleviating hull mass, increase the weight-carrying capacity of boats and ships, improve ship's speed, require deck of boat steel to have high strength, high precision, good low temperature impelling strength, welding property.
Shipping steel generally adopts grain fineness number and the generation carboritride precipitation strength of cooling controlling and rolling controlling process with the control steel, obtains the structured material that optimal mechanical properties such as high strength, high tenacity, high weldability and good processability cooperate under hot-rolled state.After carrying out the controlled rolling and controlled cooling technology, the thermal treatment amount of product significantly reduces, but for the thicker deck of boat, the product that adopts cooling controlling and rolling controlling process to obtain is organized usually inhomogeneous, influences the use of material.Therefore, need carry out later stage thermal treatment, to obtain optimum properties to thicker steel plate.Special thick hull plate is very harsh as a kind of structure iron of special use to its performance requriements, not only will satisfy the index of intensity, plasticity under big thickness specification, also requires good low-temperature flexibility and welding property.
Summary of the invention
The present invention aims to provide more than a kind of yield strength 590MPa, and has the production method of the steel-plate with specified dimensions for hull structure of good low-temperature flexibility.
Invention realizes the technical scheme of purpose:
The production method of steel-plate with specified dimensions for hull structure, production technique comprise desulfurizing iron, converter top and bottom blowing, vacuum-treat, continuous casting, controlled rolling and controlled cooling, thermal treatment, it is characterized in that:
The composition quality per-cent (Wt%) of steel is: C 0.02～0.1, and Si 0.2～0.4, and Mn 0.5～1.5, Alt 0.02～0.04, Nb 0.02～0.08, and V 0.005～0.1, and Ti 0.008～0.02, Cr 0.3～0.7, Mo 0.2～0.5, and Ni 0.3～1.4, and Cu 0.2～1.2, B 0.001～0.002, P
0.013, S
0.005, O
0.0012, N
0.0045, H
0.00015 all the other are Fe and unavoidable impurities;
Processing step and parameter are:
(1) will satisfy the molten steel casting that chemical ingredients requires and become 220～300mm heavy slab, and roll the luggage stove heating of advancing, heating zone and soaking zone temperature are 1250 ℃, rate of heating 8～10min/cm, heat-up time 250～350min;
(2) in the roughing operation, start rolling temperature is 1100～1180 ℃, the roughing finishing temperature
990 ℃, intermediate blank treats that temperature thickness is 100～150mm, 840～890 ℃ of finish rolling start rolling temperatures, 790～830 ℃ of finish rolling finishing temperatures;
(3) it is cold to enter ACC control after the finish rolling fast, 8～15 ℃/s of cooling rate;
(4) return 430～660 ℃ of red temperature;
(5) quenching temperature is 900～960 ℃, time 90～180min, 500～700 ℃ of tempering temperatures, time 90～180min.
Inventive principle:
Good weldability is most important to hull steel.Be to guarantee the good welds of hull with steel, the carbon content in the steel should be reduced to below 0.10%, so just can guarantee to weld not preheating substantially or preheating temperature is lower.Nickel is the important element in the high strength hull steel.Add nickel in the steel and be mainly used in the malleableize matrix, improve the low-temperature flexibility of the toughness, particularly steel of steel.Along with the increase of nickel content in the steel, ductile-brittle transition temperature significantly reduces, and low-temperature flexibility is improved significantly.Therefore, for guaranteeing development steel good low-temperature flexibility under big thickness, it is necessary adding high-load nickel in the steel.Chromium is another important element in the steel.It is mainly used in corrosion resistance nature and the hardening capacity that improves steel.Molybdenum is the important element that improves intensity, hardening capacity and the temper resistance of steel, and vanadium is to improve the intensity of steel and the important element of temper resistance.Add the vanadium in the steel, the intensity of steel is significantly improved by the precipitation strength interaction energy.Under the prerequisite of the weldability of taking all factors into consideration steel and low-temperature flexibility, the vanadium that adds in the steel should not be higher than 0.10%.
The combined action of molybdenum, niobium, copper and boron: ferritic transformation is significantly postponed in molybdenum and boron combined action; Niobium and boron are mutually promoted, the compound transition temperature that adds fashionable reduction bainite, and further thinning microstructure improves dislocation desity in the matrix; The proeutectoid ferrite that copper and boron federation further suppress before the bainite transformation generates; Copper can make the carbide high-temp strain of niobium induce and separate out acceleration, and recrystallize stops temperature and raises, and helps carrying out controlled rolling of non-recrystallization zone and further refinement phase transmutation product.
Beneficial effect of the present invention:, comprise that adjustment is quenched and tempering process obtains optimum properties by innovation prescription and improvement production technique.By Mo-Cu-Nb-B compound action, can realize high strength, high tenacity and weldability a small amount of the interpolation under other alloying element conditions, the product of producing possesses good comprehensive mechanical properties, Rel〉590MPa, Rm〉670MPa, cross direction elongation A50〉20% ,-40 ℃ of summers are than the horizontal value of impact absorbing energy〉100J, all more than 35%, cold-bending property is good for the longitudinal stretching relative reduction in area.
Embodiment
Embodiment 1: the production method of steel-plate with specified dimensions for hull structure.The composition quality per-cent (Wt%) of steel is: C 0.07, and Si 0.23, and Mn 1.28, and P 0.009, and S 0.002, Alt 0.033, and Nb 0.027, and V 0.06, and Ti 0.015, and Cr 0.45, Mo 0.34, and Ni 0.83, and Cu 0.89, and B 0.001, and all the other are Fe and inevitable impurity.
Smelt and be cast into the 300mm heavy slab by above composition; Slab is sent into process furnace, 1250 ± 10 ℃ of Heating temperatures, heat-up time 300min; Tapping temperature
1180 ℃, the roughing start rolling temperature is 1160 ℃, the roughing finishing temperature
990 ℃; Intermediate blank is treated temperature thickness 150mm; 840 ℃ of finish rolling start rolling temperatures, 800 ℃ of finish rolling finishing temperatures; It is cold to enter the ACC control after the finish rolling fast, 8～12 ℃/s of cooling rate; Return 450 ℃ of red temperature, product thickness 60mm.This slab is quenched 680 ℃ of tempering temperatures, tempering time 180min behind 940 ℃ of insulation 150min.
Product is 632MPa along the yield strength at thickness of slab direction 1/4 place, and 1/2 place's yield strength is 597MPa, the tensile strength 706MPa at 1/4 place, the tensile strength 677MPa at 1/2 place, unit elongation
20% ,-40 ℃ of summers, all more than 179J, all more than 35%, cold-bending property was good to the stretching relative reduction in area for Z than the horizontal value of impact absorbing energy.
Embodiment 2: the production method of steel-plate with specified dimensions for hull structure.The composition quality per-cent (Wt%) of steel is: C 0.05, and Si 0.24, and Mn 1.35, and P 0.009, and S 0.001, and Alt 0.044, Nb 0.029, and V 0.051, and Ti 0.015, and Cr 0.47, and Mo 0.45, Ni 0.87, and Cu 0.85, and N 0.005, and B 0.0012, and all the other are Fe and inevitable impurity.
Smelt and be cast into the 300mm heavy slab by above composition; Slab is sent into process furnace, 1250 ± 10 ℃ of Heating temperatures, heat-up time 300min; Tapping temperature
1180 ℃, the roughing start rolling temperature is 1160 ℃, the roughing finishing temperature
990 ℃; Intermediate blank is treated temperature thickness 150mm; 840 ℃ of finish rolling start rolling temperatures, 800 ℃ of finish rolling finishing temperatures; It is cold to enter the ACC control after the finish rolling fast, cooling rate 8-12 ℃/s; Return 460 ℃ of red temperature, product thickness 60mm.Behind 940 ℃ of insulation 150min, quench 680 ℃ of tempering temperatures, tempering time 180min.
Product is 677MPa along the yield strength at thickness of slab direction 1/4 place, and 1/2 place's yield strength is 661MPa, the tensile strength 712MPa at 1/4 place, the tensile strength 703MPa at 1/2 place, unit elongation
21% ,-40 ℃ of summers, all more than 122J, all more than 35%, cold-bending property was good to the stretching relative reduction in area for Z than the horizontal value of impact absorbing energy.
Chemical examination top layer metallographic structure figure shows that the surface of steel plate metallographic structure is granular bainite and ferrite bainite mixed structure; The metallographic structure figure of heart portion shows that the surface of steel plate metallographic structure is acicular ferrite, granular bainite and ferrite bainite mixed structure.
Claims (1)
1. the production method of steel-plate with specified dimensions for hull structure, production technique comprises desulfurizing iron, converter top and bottom blowing, vacuum-treat, continuous casting, controlled rolling and controlled cooling, thermal treatment, it is characterized in that:
The composition quality per-cent (Wt%) of steel is: C 0.02～0.1, and Si 0.2～0.4, and Mn 0.5～1.5, Alt 0.02～0.04, Nb 0.02～0.08, and V 0.005～0.1, and Ti 0.008～0.02, Cr 0.3～0.7, Mo 0.2～0.5, and Ni 0.3～1.4, and Cu 0.2～1.2, B 0.001～0.002, P
0.013, S
0.005, O
0.0012, N
0.0045, H
0.00015 all the other are Fe and inevitable impurity;
Processing step and parameter are:
(1) will satisfy the molten steel casting that chemical ingredients requires and become 220～300mm heavy slab, and roll the luggage stove heating of advancing, heating zone and soaking zone temperature are 1250 ℃, rate of heating 8～10min/cm, heat-up time 250～350min;
(2) in the roughing operation, start rolling temperature is 1100～1180 ℃, the roughing finishing temperature
990 ℃, intermediate blank treats that temperature thickness is 100～150mm, 840～890 ℃ of finish rolling start rolling temperatures, 790～830 ℃ of finish rolling finishing temperatures;
(3) it is cold to enter ACC control after the finish rolling fast, 8～15 ℃/s of cooling rate;
(4) return 430～660 ℃ of red temperature;
(5) quenching temperature is 900～960 ℃, time 90～180min, 500～700 ℃ of tempering temperatures, time 90～180min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010275269 CN101921968A (en) | 2010-09-08 | 2010-09-08 | Production method of steel-plate with specified dimensions for hull structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010275269 CN101921968A (en) | 2010-09-08 | 2010-09-08 | Production method of steel-plate with specified dimensions for hull structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101921968A true CN101921968A (en) | 2010-12-22 |
Family
ID=43337178
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|---|---|---|---|
| CN 201010275269 Pending CN101921968A (en) | 2010-09-08 | 2010-09-08 | Production method of steel-plate with specified dimensions for hull structure |
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| CN (1) | CN101921968A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643960A (en) * | 2012-04-23 | 2012-08-22 | 湖南华菱湘潭钢铁有限公司 | Heat treatment method for improving mechanical property of low-carbon hardened and tempered steel |
| CN103540865A (en) * | 2013-11-12 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of tempered high-strength Q620D super-thick steel plate |
| CN103555911A (en) * | 2013-11-12 | 2014-02-05 | 湖南华菱湘潭钢铁有限公司 | Production method of quenched and tempered high-strength Q890E super-thick steel plate |
| CN106435368A (en) * | 2016-11-26 | 2017-02-22 | 湖南华菱湘潭钢铁有限公司 | Production method of anti-delayed-fracture and superhigh-strength steel plate |
| CN108588564A (en) * | 2018-06-13 | 2018-09-28 | 合肥信亚达智能科技有限公司 | A kind of security protection isolation rail anticollision high strength steel |
| CN114855085A (en) * | 2022-05-19 | 2022-08-05 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN117845122A (en) * | 2024-01-04 | 2024-04-09 | 新疆八一钢铁股份有限公司 | Multi-process-adaptive high-strength structural steel plate flexible production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101497971A (en) * | 2008-10-31 | 2009-08-05 | 湖南华菱湘潭钢铁有限公司 | High-strength hardened and tempered steel and production method thereof |
| CN101775559A (en) * | 2010-03-17 | 2010-07-14 | 北京科技大学 | Easily welded high-strength-and-toughness ship plate steel and production process |
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2010
- 2010-09-08 CN CN 201010275269 patent/CN101921968A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497971A (en) * | 2008-10-31 | 2009-08-05 | 湖南华菱湘潭钢铁有限公司 | High-strength hardened and tempered steel and production method thereof |
| CN101775559A (en) * | 2010-03-17 | 2010-07-14 | 北京科技大学 | Easily welded high-strength-and-toughness ship plate steel and production process |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643960A (en) * | 2012-04-23 | 2012-08-22 | 湖南华菱湘潭钢铁有限公司 | Heat treatment method for improving mechanical property of low-carbon hardened and tempered steel |
| CN103540865A (en) * | 2013-11-12 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of tempered high-strength Q620D super-thick steel plate |
| CN103555911A (en) * | 2013-11-12 | 2014-02-05 | 湖南华菱湘潭钢铁有限公司 | Production method of quenched and tempered high-strength Q890E super-thick steel plate |
| CN103540865B (en) * | 2013-11-12 | 2015-06-10 | 湖南华菱湘潭钢铁有限公司 | Production method of tempered high-strength Q620D super-thick steel plate |
| CN106435368A (en) * | 2016-11-26 | 2017-02-22 | 湖南华菱湘潭钢铁有限公司 | Production method of anti-delayed-fracture and superhigh-strength steel plate |
| CN108588564A (en) * | 2018-06-13 | 2018-09-28 | 合肥信亚达智能科技有限公司 | A kind of security protection isolation rail anticollision high strength steel |
| CN114855085A (en) * | 2022-05-19 | 2022-08-05 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN114855085B (en) * | 2022-05-19 | 2023-08-15 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN117845122A (en) * | 2024-01-04 | 2024-04-09 | 新疆八一钢铁股份有限公司 | Multi-process-adaptive high-strength structural steel plate flexible production method |
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Application publication date: 20101222 |