CN107326279A - Thermo-mechanical rolling type special thick easily welding S460M structural steel and irons and production method - Google Patents
Thermo-mechanical rolling type special thick easily welding S460M structural steel and irons and production method Download PDFInfo
- Publication number
- CN107326279A CN107326279A CN201710482286.5A CN201710482286A CN107326279A CN 107326279 A CN107326279 A CN 107326279A CN 201710482286 A CN201710482286 A CN 201710482286A CN 107326279 A CN107326279 A CN 107326279A
- Authority
- CN
- China
- Prior art keywords
- steel
- irons
- rolling
- thermo
- temperature
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of thermo-mechanical rolling type special thick easily welding S460M structural steel and irons and production method, steel plate chemical composition composition and weight/mass percentage composition are：C：0.06 0.08%, Si：0.25 0.50%, Mn：1.40 1.60%, P≤0.015%, S≤0.005%, Ni：0.15 0.25%, Nb：0.060 0.070%, Al：0.030 0.050%, V：0.040 0.050%, surplus is Fe and inevitable impurity；Production method includes smelting, continuous casting, heating, rolling, refrigerating work procedure.Steel plate Design of Chemical Composition uses low C, and Nb, V microalloying are aided with the alloying elements such as Ni, obtain the complex tissue of ferrite, bainite, pearlite, with low-carbon-equivalent and crack-sensitivity type index, the characteristics of low temperature rushes good-toughness, weldability is good.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of special thick easily welding S460M structural steel of thermo-mechanical rolling type
Plate and production method.
Background technology
THE WIND ENERGY RESOURCES IN CHINA is enriched, according to National Energy Board《Wind Power Development report in 2008》, tentatively verify land-based area liftoff
10 meters of height wind energy resources gross reserves are 43.5 hundred million kilowatts, and wherein technical exploitation amount is about 300,000,000 kilowatts, and wind-powered electricity generation is arrived if calculated
Machine unit hub height, the technical exploitation amount of wind energy is about 600,000,000 kilowatts, is mainly distributed on NORTHWEST CHINA area big portion, Hua Beibei
Portion, Northern-Northeast China, Hinterland of Qinghai-Xizang Plateau and coastal area.North China, northwest, three, northeast area are the land wind energy resourceses of China
Most abundant area, Jiangsu Province is one of most abundant area of offshore wind energy resource, and the rapid growth of Wind Power Generation Industry is wind power equipment
Development provides strong support.
Wind-powered electricity generation is mainly wind power equipment industry with the downstream industry of steel.For a long time, China's supply of electric power relies primarily on fire
Electricity.Tenth Five-Year Plan Period, China proposes the strategy of readjusting the energy structure, and actively pushes forward the supply of the clean energy resourcies such as nuclear power, wind-powered electricity generation, changes
Transition relies on the situation of Coal Energy Source.Therefore exploitation easily welding, special thick wind-powered electricity generation is significant with steel.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of special thick easily welding S460M structural steel and irons of thermo-mechanical rolling type；
Present invention also offers a kind of production method of the special thick easily welding S460M structural steel and irons of thermo-mechanical rolling type.
To solve the above problems, the present invention uses the technical scheme to be：A kind of special thick easily welding S460M of thermo-mechanical rolling type
Structural steel and iron, the steel plate chemical composition composition and weight/mass percentage composition are：C：0.06-0.08%, Si：0.25-0.50%, Mn：
1.40-1.60%, P≤0.015%, S≤0.005%, Ni：0.15-0.25%, Nb：0.060-0.070%, Al：0.030-
0.050%, V：0.040-0.050%, surplus is Fe and inevitable impurity.
The Design of Chemical Composition that steel plate of the present invention is used, carbon, manganese solution strengthening；A small amount of Nb, V, Ni crystal grain thinning is added,
Its carbonitride plays dispersion-strengthened action；By subsequently accurately cooling controlling and rolling controlling process, steel plate has good mechanical property；
Wherein, the effect of each component and content in the present invention is：
C：0.06-0.08%, carbon makes a significant impact on the surrender of steel, tensile strength, welding performance；Carbon passes through gap solid solution energy
Armor plate strength is significantly improved, but carbon content is too high, and the welding performance and toughness of steel can be influenceed again.
Si：0.25-0.50%, as reducing agent and deoxidier in steelmaking process, while Si can also play solution strengthening work
With, but during more than 0.5%, the toughness of steel can be caused to decline, reduce the welding performance of steel.
Mn：1.40-1.60%, manganese is with low cost, can increase the toughness, intensity and hardness of steel, improves the quenching degree of steel, changes
The hot-working character of kind steel；Manganese amount is too high, center segregation easily occurs for big thickness steel plate.
P≤0.015%, S≤0.005%, in general, p and ses are all harmful elements in steel, increase the fragility of steel；
Phosphorus makes welding performance degenerate, and reduces plasticity, cold-bending property is degenerated；Sulphur reduces the ductility and toughness of steel, is caused in rolling
Crackle；Therefore should try one's best the content for reducing p and ses in steel.
Al：0.030-0.050%, aluminium is to add a small amount of aluminium in the deoxidier commonly used in steel, steel, can crystal grain thinning, improve
Impact flexibility；Aluminium also has inoxidizability and corrosion resistance, too high then to influence hot-working character, welding performance and the cutting of steel
Processing characteristics.
Nb：0.060-0.070%, the crystal grain refinement for being added to promote steel rolling microscopic structure of niobium, can be improved simultaneously
Intensity and toughness, niobium can be in During Controlled Rollings by suppressing austenite recrystallization, effective refinement microstructure, and pass through precipitation
Strengthen matrix；In welding process, the roughening of austenite crystal when the segregation of niobium atom and precipitation can hinder to heat, and ensure weldering
Relatively fine heat affected area tissue, improving welding property are obtained after connecing.
Ni：0.15-0.25%, nickel is dissolved in austenite, suppresses austenite recrystallization, and fining austenite grains improve steel plate low
Warm toughness.
V：0.040-0.050%, V main function are the alternate precipitation in γ-α transition processes and the analysis in ferrite
Go out reinforcing.
Steel plate carbon equivalent of the present invention（Ceq）For 0.38-0.42%, weld crack sensitivity coefficient（Pcm）For 0.15-
0.18%。
Steel plate of the present invention is organized as the complex tissue of ferrite+bainite+pearlite, and maximum gauge can reach
110mm。
Steel plate yield strength 400-490MPa of the present invention, tensile strength 520-600MPa；The impact of -50 DEG C of thickness of slab center
Work(＞ 70J.
It is described present invention also offers a kind of production method of the special thick easily welding S460M structural steel and irons of thermo-mechanical rolling type
Production method includes smelting, continuous casting, heating, rolling, refrigerating work procedure；The rolling process, using recrystallization zone+Unhydrated cement
Two benches controlled rolling process is rolled.
Rolling process of the present invention, is rolled, first using recrystallization zone+Unhydrated cement two benches controlled rolling process
Stage rolling temperature is 930~1100 DEG C, and this stage single pass rolling reduction is 10~20%, and it is 30~50% to add up reduction ratio；The
Two-stage rolling temperature is 850~880 DEG C, and it is 30~50% to add up reduction ratio.
Smelting procedure of the present invention, molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.7-1.8kg/t steel
Refining, liquid steel temperature reaches that 1530-1550 DEG C is transferred to addition amount of lime before VD stove Fruit storages, VD >=10kg/t steel change
Inclusion morphology, vacuum≤66.6Pa of Fruit storage, vacuum retention time >=20min；Ensure ladle chemistry
Composition and weight/mass percentage composition are：C：0.06-0.08%, Si：0.25-0.50%, Mn：1.40-1.60%, P≤0.015%, S≤
0.005%, Ni：0.15-0.25%, Nb：0.060-0.070%, Al：0.030-0.050%, V：0.040-0.050%, surplus is Fe
With inevitable impurity.
Continuous casting working procedure of the present invention, using 300mm thickness continuous casting billets, steel billet is heated according to 1min/mm.
Heating process of the present invention, 1250 DEG C of steel billet maximum heating temperature, 1220 DEG C of soaking temperature, total heat time >=
300min, soaking zone time inside furnace >=60min.
Refrigerating work procedure of the present invention, uses ACC water coolings, enters 790-810 DEG C of coolant-temperature gage, red temperature 570-600 after rolling
DEG C, obtain finished steel plate.
The special thickness S60M structural steel and iron product standards of easily welding of the invention refer to EN10025-4.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, the Design of Chemical Composition of steel plate of the invention is used
Low C, it is ensured that the good weldability of steel plate, is designed, being aided with the alloying elements such as Ni ensures steel plate toughness, obtains using Nb, V microalloying
To ferrite, bainite, pearlite complex tissue.2nd, steel plate maximum gauge of the present invention can reach 110mm.3rd, the present invention passes through
The steel plate of thermo-mechanical rolling technique productions production, carbon equivalent（Ceq）0.38-0.42%, weld crack sensitivity coefficient（Pcm）
0.15-0.18%, yield strength 400-490MPa, tensile strength 520-600MPa, -50 DEG C of thickness of slab center ballistic work are more than 70J.
4th, the thick easily welding S460M structural steel and irons of spy produced using the inventive method have low-carbon-equivalent and crack-sensitivity type index, have
There is the characteristics of low temperature rushes good-toughness, weldability is good.
Brief description of the drawings
Fig. 1 is the micro-organization chart of the steel plate of embodiment 1；
Fig. 2 is the micro-organization chart of the steel plate of embodiment 2；
Fig. 3 is the micro-organization chart of the steel plate of embodiment 3；
Fig. 4 is the micro-organization chart of the steel plate of embodiment 4；
Fig. 5 is the micro-organization chart of the steel plate of embodiment 5；
Fig. 6 is the micro-organization chart of the steel plate of embodiment 6；
Fig. 7 is the micro-organization chart of the steel plate of embodiment 7；
Fig. 8 is the micro-organization chart of the steel plate of embodiment 8.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Easily welding spy's thickness S60M structural steel and irons are produced using following methods：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.7-1.8kg/t steel refinings, molten steel temperature
Degree reaches that 1530-1550 DEG C is transferred to addition amount of lime before VD stove Fruit storages, VD >=10kg/t steel change inclusion morphology,
Vacuum≤66.6Pa of Fruit storage, vacuum retention time >=20min；Ensure ladle chemistry composition and quality hundred
Point content is：C：0.06-0.08%, Si：0.25-0.50%, Mn：1.40-1.60%, P≤0.015%, S≤0.005%, Ni：
0.15-0.25%, Nb：0.060-0.070%, Al：0.030-0.050%, V：0.040-0.050%, surplus is Fe and inevitable
Impurity.
（2）Continuous casting working procedure：Using 300mm thickness continuous casting billets, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of steel billet maximum heating temperature, 1220 DEG C of soaking temperature, total heat time >=300min,
Soaking zone time inside furnace >=60min.
（4）Rolling process：Rolled using recrystallization zone+Unhydrated cement two benches controlled rolling process, the first stage rolls
Temperature processed is 930~1100 DEG C, and this stage single pass rolling reduction is 10~20%, and it is 30~50% to add up reduction ratio；Second stage
Rolling temperature is 850~880 DEG C, and it is 30~50% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 790 DEG C -810 DEG C of coolant-temperature gage, 570~600 DEG C of red temperature is obtained
To finished steel plate.
Embodiment 1
It is 70mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in Table
1。
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, and feeding LF refining furnace feeding Al line 1.7kg/t steel refinings, liquid steel temperature reaches
It is transferred to before VD stove Fruit storages, VD and is added at amount of lime 10kg/t steel change inclusion morphology, vacuum outgas to 1540 DEG C
The vacuum 66.6Pa of reason, vacuum retention time 20min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 331min, soaking zone
Time inside furnace 63min.
（4）Rolling process：First stage rolling temperature is 1030 DEG C, and single pass rolling reduction is 20%, and accumulative reduction ratio is
50%；Second stage rolling temperature is 855 DEG C, and it is 30% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 799 DEG C of coolant-temperature gage, 577 DEG C of red temperature.
The mechanical property of special thickness S60M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 435MPa, tension
Intensity 582MPa, the average 168J of -50 DEG C of ballistic works；Fig. 1 sees in micro-organization chart, as seen from Figure 1 steel plate be ferrite+bainite+
The complex tissue of pearlite.
Embodiment 2
It is 80mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in Table
1。
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.72kg/t steel refinings, liquid steel temperature
Reach that 1542 DEG C are transferred to addition amount of lime 10.2kg/t steel change inclusion morphology before VD stove Fruit storages, VD, vacuum takes off
The vacuum 61Pa of gas disposal, vacuum retention time 22min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 324min, soaking zone
Time inside furnace 67min.
（4）Rolling process：First stage rolling temperature is 1035 DEG C, and single pass rolling reduction is 12%, and accumulative reduction ratio is
46%；Second stage rolling temperature is 870 DEG C, and it is 35% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 805 DEG C of coolant-temperature gage, 585 DEG C of red temperature.
The mechanical property of special thickness S60M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 455MPa, tension
Intensity 572MPa, the average 121J of -50 DEG C of ballistic works；Fig. 2 sees in micro-organization chart, as seen from Figure 2 steel plate be ferrite+bainite+
The complex tissue of pearlite.
Embodiment 3
It is 90mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in Table
1。
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.74kg/t steel refinings, liquid steel temperature
Reach that 1540 DEG C are transferred to addition amount of lime 10.3kg/t steel change inclusion morphology before VD stove Fruit storages, VD, vacuum takes off
The vacuum 66.6Pa of gas disposal, vacuum retention time 20min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 333min, soaking zone
Time inside furnace 62min.
（4）Rolling process：First stage rolling temperature is 1033 DEG C, and single pass rolling reduction is 20%, and accumulative reduction ratio is
50%；Second stage rolling temperature is 866 DEG C, and it is 30% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 809 DEG C of coolant-temperature gage, 592 DEG C of red temperature.
The mechanical property of special thickness S60M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 453MPa, tension
Intensity 592MPa, the average 123J of -50 DEG C of ballistic works；Fig. 3 sees in micro-organization chart, as seen from Figure 3 steel plate be ferrite+bainite+
The complex tissue of pearlite.
Embodiment 4
It is 100mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in
Table 1.
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.75kg/t steel refinings, liquid steel temperature
Reach that 1535 DEG C are transferred to addition amount of lime 10.4kg/t steel change inclusion morphology before VD stove Fruit storages, VD, vacuum takes off
The vacuum 62Pa of gas disposal, vacuum retention time 24min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 315min, soaking zone
Time inside furnace 67min.
（4）Rolling process：First stage rolling temperature is 1043 DEG C, and single pass rolling reduction is 19%, and accumulative reduction ratio is
36%；Second stage rolling temperature is 855 DEG C, and it is 42% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 792 DEG C of coolant-temperature gage, 575 DEG C of red temperature.
The mechanical property of special thickness S60M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 463MPa, tension
Intensity 599MPa, the average 143J of -50 DEG C of ballistic works；Fig. 4 sees in micro-organization chart, as seen from Figure 4 steel plate be ferrite+bainite+
The complex tissue of pearlite.
Embodiment 5
It is 110mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in
Table 1.
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.78kg/t steel refinings, liquid steel temperature
Reach that 1543 DEG C are transferred to addition amount of lime 10.5kg/t steel change inclusion morphology before VD stove Fruit storages, VD, vacuum takes off
The vacuum 65Pa of gas disposal, vacuum retention time 22min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 338min, soaking zone
Time inside furnace 62min.
（4）Rolling process：First stage rolling temperature is 1033 DEG C, and single pass rolling reduction is 16%, and accumulative reduction ratio is
45%；Second stage rolling temperature is 875 DEG C, and it is 35% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 805 DEG C of coolant-temperature gage, 585 DEG C of red temperature.
The mechanical property of special thickness S60M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 453MPa, tension
Intensity 592MPa, the average 123J of -50 DEG C of ballistic works；Fig. 5 sees in micro-organization chart, as seen from Figure 5 steel plate be ferrite+bainite+
The complex tissue of pearlite.
Embodiment 6
It is 85mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in Table
1。
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.79kg/t steel refinings, liquid steel temperature
Reach that 1535 DEG C are transferred to addition amount of lime 10.6kg/t steel change inclusion morphology before VD stove Fruit storages, VD, vacuum takes off
The vacuum 60Pa of gas disposal, vacuum retention time 28min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 340min, soaking zone
Time inside furnace 68min.
（4）Rolling process：First stage rolling temperature is 1050 DEG C, and single pass rolling reduction is 17%, and accumulative reduction ratio is
35%；Second stage rolling temperature is 865 DEG C, and it is 45% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 795 DEG C of coolant-temperature gage, 585 DEG C of red temperature.
The mechanical property of special thickness S60M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 476MPa, tension
Intensity 583MPa, the average 133J of -50 DEG C of ballistic works；Fig. 6 sees in micro-organization chart, as seen from Figure 6 steel plate be ferrite+bainite+
The complex tissue of pearlite.
Embodiment 7
It is 95mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in Table
1。
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, and feeding LF refining furnace feeding Al line 1.8kg/t steel refinings, liquid steel temperature reaches
It is transferred to 1530 DEG C before VD stove Fruit storages, VD and adds amount of lime 10.9kg/t steel change inclusion morphology, vacuum outgas
The vacuum 66.6Pa of processing, vacuum retention time 20min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 300min, soaking zone
Time inside furnace 60min.
（4）Rolling process：First stage rolling temperature is 930 DEG C, and single pass rolling reduction is 10%, and accumulative reduction ratio is
30%；Second stage rolling temperature is 850 DEG C, and it is 50% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 790 DEG C of coolant-temperature gage, 570 DEG C of red temperature.
The mechanical property of special thickness S60M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 405MPa, tension
Intensity 523MPa, the average 103J of -50 DEG C of ballistic works；Fig. 7 sees in micro-organization chart, as seen from Figure 7 steel plate be ferrite+bainite+
The complex tissue of pearlite.
Embodiment 8
It is 105mm that the present embodiment, which easily welds special thickness S60M structural steel and irons thickness, and its chemical composition composition and weight/mass percentage composition are shown in
Table 1.
The present embodiment, which easily welds special thickness S60M structural steel and irons production method, includes smelting, continuous casting, heating, rolling, bosher
Sequence, concrete technology step is as described below：
（1）Smelting procedure：Molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.73kg/t steel refinings, liquid steel temperature
Reach that 1550 DEG C are transferred to addition amount of lime 11kg/t steel change inclusion morphology, vacuum outgas before VD stove Fruit storages, VD
The vacuum 66Pa of processing, vacuum retention time 25min；Ladle chemistry is constituted and weight/mass percentage composition is shown in Table 1.
（2）Continuous casting working procedure：Using the continuous casting billet of 300mm thickness, steel billet is heated according to 1min/mm.
（3）Heating process：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heat time 310min, soaking zone
Time inside furnace 70min.
（4）Rolling process：First stage rolling temperature is 1100 DEG C, and single pass rolling reduction is 15%, and accumulative reduction ratio is
40%；Second stage rolling temperature is 880 DEG C, and it is 40% to add up reduction ratio.
（5）Refrigerating work procedure：ACC water coolings are used after rolling, enter 810 DEG C of coolant-temperature gage, 600 DEG C of red temperature.
The mechanical property of special thickness S460M structure wind-powered electricity generation steel plates is easily welded obtained by the present embodiment：Yield strength 486MPa, tension
Intensity 589MPa, the average 128J of -50 DEG C of ballistic works；Fig. 8 sees in micro-organization chart, as seen from Figure 8 steel plate be ferrite+bainite+
The complex tissue of pearlite.
The embodiment 1-8 light plates of table 1 and ladle chemistry composition and weight/mass percentage composition（%）
Above example is only used to illustrative and not limiting technical scheme, although entering with reference to above-described embodiment to the present invention
Go detailed description, it will be understood by those within the art that：Still the present invention can be modified or equally replaced
Change, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover will in right of the invention
Ask among scope.
Claims (10)
1. a kind of special thick easily welding S460M structural steel and irons of thermo-mechanical rolling type, it is characterised in that the steel plate chemical composition composition
And weight/mass percentage composition is：C：0.06-0.08%, Si：0.25-0.50%, Mn：1.40-1.60%, P≤0.015%, S≤
0.005%, Ni：0.15-0.25%, Nb：0.060-0.070%, Al：0.030-0.050%, V：0.040-0.050%, surplus is Fe
With inevitable impurity.
2. the special thick easily welding S460M structural steel and irons of a kind of thermo-mechanical rolling type according to claim 1, it is characterised in that
The steel plate carbon equivalent Ceq is 0.38-0.42%, and weld crack sensitivity coefficient Pcm is 0.15-0.18%.
3. the special thick easily welding S460M structural steel and irons of a kind of thermo-mechanical rolling type according to claim 1, it is characterised in that
The steel plate is organized as the complex tissue of ferrite+bainite+pearlite, and maximum gauge can reach 110mm.
4. the special thick easily welding S460M structural steel and irons of a kind of thermo-mechanical rolling type according to claim 1, it is characterised in that
The steel plate yield strength 400-490MPa, tensile strength 520-600MPa；- 50 DEG C of thickness of slab center ballistic work ＞ 70J.
5. based on a kind of special thick easily welding S460M structural steel and irons of thermo-mechanical rolling type described in claim 1-4 any one
Production method, it is characterised in that the production method includes smelting, continuous casting, heating, rolling, refrigerating work procedure；The rolling work
Sequence, is rolled using recrystallization zone+Unhydrated cement two benches controlled rolling process.
6. a kind of production method of the special thick easily welding S460M structural steel and irons of thermo-mechanical rolling type according to claim 5, its
It is characterised by, the rolling process, is rolled using recrystallization zone+Unhydrated cement two benches controlled rolling process, the first stage
Rolling temperature is 930~1100 DEG C, and this stage single pass rolling reduction is 10~20%, and it is 30~50% to add up reduction ratio；Second-order
Section rolling temperature is 850~880 DEG C, and it is 30~50% to add up reduction ratio.
7. a kind of production method of the special thick easily welding S460M structural steel and irons of thermo-mechanical rolling type according to claim 5, its
It is characterised by, the smelting procedure, molten steel is first through electric furnace smelting, feeding LF refining furnace feeding Al line 1.7-1.8kg/t steel, molten steel
Temperature reaches that 1530-1550 DEG C is transferred to addition amount of lime before VD stove Fruit storages, VD >=10kg/t steel change field trash shape
State, vacuum≤66.6Pa of Fruit storage, vacuum retention time >=20min；Ensure ladle chemistry composition and matter
Measuring percentage composition is：C：0.06-0.08%, Si：0.25-0.50%, Mn：1.40-1.60%, P≤0.015%, S≤0.005%, Ni：
0.15-0.25%, Nb：0.060-0.070%, Al：0.030-0.050%, V：0.040-0.050%, surplus is Fe and inevitable
Impurity.
8. the special thickness of a kind of thermo-mechanical rolling type according to claim 5-7 any one easily welds S460M structural steel and irons
Production method, it is characterised in that the continuous casting working procedure, using 300mm thickness continuous casting billets, steel billet is heated according to 1min/mm.
9. the special thickness of a kind of thermo-mechanical rolling type according to claim 5-7 any one easily welds S460M structural steel and irons
Production method, it is characterised in that the heating process, 1250 DEG C of steel billet maximum heating temperature, 1220 DEG C of soaking temperature, total heating
Time >=300min, soaking zone time inside furnace >=60min.
10. the special thickness of a kind of thermo-mechanical rolling type according to claim 5-7 any one easily welds S460M structural steel and irons
Production method, it is characterised in that the refrigerating work procedure, uses ACC water coolings, enters 790-810 DEG C of coolant-temperature gage, red temperature after rolling
570-600 DEG C, obtain finished steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482286.5A CN107326279A (en) | 2017-06-22 | 2017-06-22 | Thermo-mechanical rolling type special thick easily welding S460M structural steel and irons and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482286.5A CN107326279A (en) | 2017-06-22 | 2017-06-22 | Thermo-mechanical rolling type special thick easily welding S460M structural steel and irons and production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107326279A true CN107326279A (en) | 2017-11-07 |
Family
ID=60194317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710482286.5A Pending CN107326279A (en) | 2017-06-22 | 2017-06-22 | Thermo-mechanical rolling type special thick easily welding S460M structural steel and irons and production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107326279A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103407A (en) * | 2018-01-31 | 2018-06-01 | 舞阳钢铁有限责任公司 | Surrender 450MPa grades of sour environment military service Pipeline Steel Plates and its production method |
| CN115244205A (en) * | 2020-03-13 | 2022-10-25 | 日本制铁株式会社 | Steel sheet for wind power generation facility and method for producing same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932063A (en) * | 2005-09-12 | 2007-03-21 | 鞍钢股份有限公司 | Thick steel plate with high strength and low welding crack sensitivity and its production process |
| CN104357742A (en) * | 2014-11-10 | 2015-02-18 | 舞阳钢铁有限责任公司 | 420MPa high-thickness hot-rolled steel sheet for ocean engineering and production method thereof |
| CN106591718A (en) * | 2016-12-02 | 2017-04-26 | 舞阳钢铁有限责任公司 | High-toughness antiacid quenched and tempered pipe steel plate with yield strength being 420 MPa grade and production method |
-
2017
- 2017-06-22 CN CN201710482286.5A patent/CN107326279A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932063A (en) * | 2005-09-12 | 2007-03-21 | 鞍钢股份有限公司 | Thick steel plate with high strength and low welding crack sensitivity and its production process |
| CN104357742A (en) * | 2014-11-10 | 2015-02-18 | 舞阳钢铁有限责任公司 | 420MPa high-thickness hot-rolled steel sheet for ocean engineering and production method thereof |
| CN106591718A (en) * | 2016-12-02 | 2017-04-26 | 舞阳钢铁有限责任公司 | High-toughness antiacid quenched and tempered pipe steel plate with yield strength being 420 MPa grade and production method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103407A (en) * | 2018-01-31 | 2018-06-01 | 舞阳钢铁有限责任公司 | Surrender 450MPa grades of sour environment military service Pipeline Steel Plates and its production method |
| CN115244205A (en) * | 2020-03-13 | 2022-10-25 | 日本制铁株式会社 | Steel sheet for wind power generation facility and method for producing same |
| CN115244205B (en) * | 2020-03-13 | 2023-11-03 | 日本制铁株式会社 | Steel sheet for wind power plant and method for producing same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111996437B (en) | Production method of large-thickness high-toughness ultrahigh-strength steel plate with yield strength of 1100MPa | |
| CN102277540B (en) | igh temperature PWHT softening and production method thereof | |
| CN104911503B (en) | A kind of special thick quenched ocean engineering EH40 steel and preparation method thereof | |
| CN102732789A (en) | High-performance ocean platform steel and its production method | |
| CN109504897A (en) | A kind of big thickness water power steel of 80kg grades of low-carbon-equivalent low-crackle sensitive and its manufacturing method | |
| CN110079740A (en) | A kind of 530MPa grades of automobile cold stamping axle housing steel plates of high tenacity hot rolling and its manufacturing method | |
| CN109652733B (en) | 690 MPa-grade super-thick steel plate and manufacturing method thereof | |
| CN113249641B (en) | 100-120 mm Q460D super-thick high-strength steel and preparation method thereof | |
| CN107557668A (en) | TMCP types surrender 345MPa level Weather-resistance bridge steel plates and production method | |
| CN107904488B (en) | Super-thick high-strength high-toughness lamellar tearing-resistant Q550 steel plate and manufacturing method thereof | |
| CN107385358A (en) | A kind of TMCP types surrender 420MPa bridge steel plates and its production method | |
| CN105908086A (en) | Extremely-thick low-alloy steel plate with low compression ratio and preparation method thereof | |
| CN104372257A (en) | Low-alloy high-strength middle-thickness plate capable of utilizing self-tempering waste heat to improve toughness and preparation method of low-alloy high-strength middle-thickness plate | |
| CN107937807A (en) | 770MPa grades of low-welding crack-sensitive pressure vessel steels and its manufacture method | |
| CN108950387B (en) | steel with excellent high-temperature performance and thick specification for nuclear power safety injection box and manufacturing method thereof | |
| CN106591718A (en) | High-toughness antiacid quenched and tempered pipe steel plate with yield strength being 420 MPa grade and production method | |
| CN109628828A (en) | A kind of low yield strength ratio super thick water power high-strength steel sheet and its manufacturing method | |
| CN107557690A (en) | The super-thick steel plate and its manufacture method of a kind of low temperature resistant and anti-lamellar tearing | |
| CN107557662A (en) | Quenching and tempering type 800MPa levels low-cost and easy-to welds steel plate and its production method | |
| CN110184534B (en) | 100-150 mm thick super-thick steel plate with excellent performance after die welding treatment and production method thereof | |
| CN107267862A (en) | 570MPa grades of special thick high-toughness and low-temperature military service pipe fitting steel plates and production method | |
| CN107488812A (en) | Surrender 485MPa grade low-temp environment military service pipe fitting steel plates and its production method | |
| CN110106445A (en) | One kind is for ocean platform cast node high intensity high/low temperature toughness steel and preparation method thereof | |
| CN111270169A (en) | Ni-containing alloy steel plate with excellent low-temperature toughness and production method thereof | |
| CN113832387B (en) | Low-cost ultra-thick 1000 MPa-grade steel plate and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171107 |