CN109321817A - A kind of steel plate and its manufacturing method suitable for ultra-large linear energy input welding - Google Patents
A kind of steel plate and its manufacturing method suitable for ultra-large linear energy input welding Download PDFInfo
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- CN109321817A CN109321817A CN201710641768.0A CN201710641768A CN109321817A CN 109321817 A CN109321817 A CN 109321817A CN 201710641768 A CN201710641768 A CN 201710641768A CN 109321817 A CN109321817 A CN 109321817A
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- steel plate
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- energy input
- linear energy
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 120
- 239000010959 steel Substances 0.000 title claims abstract description 120
- 238000003466 welding Methods 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 16
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 14
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 13
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 238000003723 Smelting Methods 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 7
- 229910052796 boron Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 6
- 238000009749 continuous casting Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 238000005275 alloying Methods 0.000 claims description 5
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 229910000720 Silicomanganese Inorganic materials 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 3
- 229910007746 Zr—O Inorganic materials 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 229910026161 MgAl2O4 Inorganic materials 0.000 description 1
- 108010038629 Molybdoferredoxin Proteins 0.000 description 1
- 208000035208 Ring chromosome 20 syndrome Diseases 0.000 description 1
- 229910006639 Si—Mn Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 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
Classifications
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- 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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- 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 belongs to Hi-Stren steel technical field, in particular to a kind of steel plate and its manufacturing method suitable for ultra-large linear energy input welding.Steel plate chemical component includes one of C, Si, Mn, Nb, V, Ti, P, S, Cu, Ni, Cr, Mo, B, N, O, Al, Mg and Zr, REM, surplus Fe；By the control to field trash type various sizes of in steel plate, the significant refinement of welding heat affected zone tissue is realized.The adding technology that Ti, Zr, REM, Mg, V, N are controlled in smelting process, forms special inclusion distribution in steel, improves steel plate toughness and tenacity in combination with cooling controlling and rolling controlling process.Steel plate of the present invention is welded suitable for 500~1500kJ/cm ultra-large linear energy input, can meet the needs of fields such as building are to ultra-large linear energy input welding steel.
Description
Technical field
The invention belongs to Hi-Stren steel technical field, in particular to a kind of steel plate suitable for ultra-large linear energy input welding
And its manufacturing method.
Background technique
Medium plate is related to welding sequence mostly in engineer application, to guarantee quality of weld joint, needs welding parameters
Carry out strict control.Conventional thermal weld stress is in 50kJ/cm hereinafter, increasing heat input can be improved welding efficiency, shortening engineering
Manufacturing cycle.Especially for thick steel plate, conventional soldering method needs multi-pass welding fabrication, and it is cumbersome to need to weld preceding and interlayer
Back work, and use Large Heat Input Welding method can a time molding, production efficiency improves at several times or decades of times.Therefore,
In each engineering field, the welded manufacture of large-sized steel is intended to using Large Heat Input Welding method, to significantly reduce system
Cause this raising production efficiency.
The heat input that general high input energy welding steel can be born is in 100~400kJ/cm, but with building, ship etc.
The development of industry proposes further requirement to higher heat input welding technique, and requires steel super in 500~1500kJ/cm
Mechanical property still with higher under large-line energy, to guarantee the security reliability of engineering structure.But current China super large line energy
The production of welding steel is measured there are still difficulty, is badly in need of developing the steel plate suitable for the welding of 500~1500kJ/cm ultra-large linear energy input,
Meet the urgent need in the fields such as building, ship.
The patent of invention of Publication No. CN101045976A discloses one kind can ultra-large linear energy input welding thick steel plate for low temperature use
And its manufacturing method, it is characterized in that properly increasing the content of Als, C/Mn based on using low C- high Mn-Nb series low-alloy steel
=0.02~0.05, Ti-B microalloying, Ca or REM processing, Ti/N=3~3.5 optimize TMCP technique, realize large-line energy
Welding, but it is unsuitable for 500~1500kJ/cm ultra-large linear energy input.The patent of invention of Publication No. CN102080193A discloses one
Kind of structural steel for welding with ultra-great heat input and its manufacturing method, it is characterized in that by refining stage control alloy adding method come pair
Field trash type, size and quantity in steel are controlled, and are manufactured using cooling controlling and rolling controlling process, and 400~1000kJ/ can be born
Cm thermal weld stress.The patent of invention of Publication No. CN105714193A disclose a kind of oxide it is enhanced can high heat-input weldering
Steel plate is connect, it is characterized in that forming big gage in steel plate by the proportionate relationship between rationally control Ti, Al, Mg, O, N element
Very little is 0.2~2 μm of TiOx-MgAl2O4Composite oxide particle can bear 400~1000kJ/cm thermal weld stress.Publication number
A kind of production method of high-intensitive ultra-large linear energy input welded hull steel is disclosed for the patent of invention of CN103805880A, it is special
Sign is that vanadium iron, ferronickel, ferrotianium are added in stokehold with steel scrap, and ferrochrome and molybdenum-iron is added in refining latter stage, is set using low alloyed element
Meter can bear >=500kJ/cm ultra-large linear energy input welding.The patent of invention of Publication No. CN101818304A discloses a kind of super
Large Heat Input Welding high-strength steel and its production method, it is characterized in that by reasonable component and proportion, low alloyed element design is adopted
With Si-Mn deoxidation and controlled rolling and controlled cooling, >=500kJ/cm ultra-large linear energy input welding can be born.
It is analyzed according to the prior art, realizes that the technological means of Large Heat Input Welding includes: alloying component optimization design, used
Low-alloy and low-carbon-equivalent design improve welding performance；Refinement crystal grain ruler is precipitated using TiN in the proportionate relationship for controlling each element
It is very little；The distribution of special oxide is controlled, structure refinement is promoted；Using Controlled Rolling And Controlled Cooling, high-strength tenacity energy is realized.But super
Under the conditions of Large Heat Input Welding, heat affected area high-temperature residence time is long, and cooling velocity is slow, easily coarse micro- of formation size
Tissue reduces impact flexibility.The prior art can't well solve this problem, it is therefore desirable to develop new technique means
Meets the needs of to ultra-large linear energy input welding steel.
Summary of the invention
The object of the present invention is to provide a kind of steel plates and its manufacturing method suitable for ultra-large linear energy input welding, solve steel plate and exist
The problem of there is the microscopic structure of refinement under ultra-large linear energy input welding condition and keep good impact flexibility, institute's invention steel plate energy
Adapt to the welding of 500~1500kJ/cm ultra-large linear energy input.
The present invention adopts the following technical scheme that:
It is a kind of suitable for ultra-large linear energy input welding steel plate, by mass percentage, steel plate chemical component include: C 0.06~
0.16%, Si 0.1~0.3%, Mn 1.0~2.0%, Nb 0.01~0.05%, V 0.02~0.12%, Ti 0.005~
0.025%, P 0.001~0.008%, S 0.001~0.005%, Cu 0.01~0.5%, Ni 0.01~0.5%, Cr
0.01~0.5%, Mo 0.01~0.5%, B 0.0001~0.003%, N 0.005~0.01%, O 0.001~
0.005%, Al 0.001~0.015%, Mg 0.0005~0.005% and Zr 0.001~0.025%, REM 0.001
One of~0.025%, surplus Fe；Having a size of in 0.5~5 μm of field trash in steel plate, Ti-Mg-M-O-Mn-S is compound
The amount of inclusions accounts for 10% or more, and wherein M is one of Zr, REM.
The described steel plate for being suitable for ultra-large linear energy input welding, having a size of in 0.02~0.5 μm of field trash in steel plate, MgO
Type the amount of inclusions accounts for 10% or more.
The described steel plate for being suitable for ultra-large linear energy input welding, it is preferred that having a size of 0.02~0.5 μm of field trash in steel plate
In, MgO type the amount of inclusions accounts for 20~50%.
The described steel plate for being suitable for ultra-large linear energy input welding has the carbonitride of V in steel plate on 30% or more field trash
Precipitation.
The steel plate for being suitable for ultra-large linear energy input welding, it is preferred that have the carbon of V in steel plate on 40~70% field trash
Nitrides precipitate is precipitated.
The described steel plate for being suitable for ultra-large linear energy input welding, it is preferred that having a size of in 0.5~5 μm of field trash in steel plate,
Ti-Mg-M-O-Mn-S complex inclusion quantity accounts for 30~60%.
The described steel plate for being suitable for ultra-large linear energy input welding, steel plate thickness are 50~150mm, yield strength 300~
500MPa, under 500~1500kJ/cm weld heat input, base material and -20 DEG C of heat affected area impact flexibility >=70J.
The manufacturing method of the steel plate for being suitable for ultra-large linear energy input welding, smelting molten steel use silicomanganese aluminium pre- de- in the process
Oxygen, determine oxygen be 20~200ppm when be added Ti and V, further determine within 1~10min oxygen be 10~100ppm when addition Zr or
Determine that Mg is added when oxygen is 5~50ppm again after one of REM, 10~60min, is eventually adding 0.005~0.01wt%'s
N；Ti, V, Mg, Zr or REM are added in a manner of alloy block or line feeding, and N is added in the form of nitrided ferromanganese, ferro-silicon nitride or vanadium nitride
Add；Stirring molten steel makes in steel having a size of in 0.5~5 μm of field trash, Ti-Mg-Zr-O or Ti-Mg-REM-O complex inclusion number
Amount accounts for 10% or more, having a size of 5 μm or more of the amount of inclusions≤105A/cm3；Other alloys are adjusted according to steel plate component requirements
Constituent content, ingredient qualification molten steel are cast into continuous casting billet or ingot casting；Continuous casting billet or ingot casting are heated to 1150~1250 DEG C, heat preservation 60
~240min is rolled using austenite recrystallization area and Unhydrated cement two-stage control, rolls rear steel plate watering cooling, cooling speed
Spend >=10 DEG C/s, 500~700 DEG C of final cooling temperature.
The manufacturing method of the steel plate for being suitable for ultra-large linear energy input welding, steel plate carry out normalizing or Tempering and Quenching.
The manufacturing method of the steel plate for being suitable for ultra-large linear energy input welding, it is preferred that steel plate thickness is 60~100mm,
350~450MPa of yield strength, under 500~1500kJ/cm weld heat input, base material and -20 DEG C of heat affected area impact flexibility
100~200J.
Design philosophy of the invention is:
Under ultra-large linear energy input welding condition, coarse grain boundary ferrite and side lath structure are easily formed in HAZ, cause to impact
Toughness reduces.For the improvement for realizing ultra-large linear energy input HAZ toughness, it is necessary to while inhibiting AUSTENITE GRAIN COARSENING, reducing crystal boundary iron
Ferritic forms, inhibits ferrite side plate to grow up and Intragranular Acicular Ferrite is promoted to change.However, in the prior art can't be fine
Solve the problems, such as this, can not achieve HAZ tissue comprehensive regulation.For this target, emphasis of the present invention passes through smelting process
With the Special controlling of field trash, the complex inclusion and precipitate of different type, size and number are introduced in steel, is carried out simultaneously
The ultra-large linear energy input welding of super-thick steel plate is realized in the optimization of alloying component and the optimization for rolling cooling technique.
The invention has the advantages and beneficial effects that:
1, the present invention forms specific type folder by the control of optimizing components design and crucial smelting process for production in steel
Sundries distribution；Promote acicular ferrite nucleating using the composite oxides of the micron order size containing Ti, Zr or REM；Using containing
There is the oxide of the submicron-scale of MgO to inhibit AUSTENITE GRAIN COARSENING；It is significantly improved by the compound precipitation of the carbonitride of V
The nucleation ability of Intragranular Acicular Ferrite；Welding heat affected zone microscopic structure significantly refines, and ultra-large linear energy input welding performance, which is stablized, to be improved.
2, technical solution of the present invention principle and technique are clear, and feasibility is strong, significant effect, are conducive to promote and apply, can expire
Demand of each field of foot to ultra-large linear energy input welding steel.
Detailed description of the invention
Fig. 1 is typical field trash pattern and its at being grouped as figure in 2 steel of embodiment.
Specific embodiment
In the following, being further elaborated on by embodiment and attached drawing to the present invention.
Embodiment 1
In the present embodiment, suitable for the steel plate of ultra-large linear energy input welding, chemical component includes: C by weight percentage
0.1%, Si 0.2%, Mn 1.1%, Nb 0.015%, V 0.025%, Ti 0.025%, P 0.003%, S 0.003%,
Cu 0.02%, Ni 0.1%, Cr 0.1%, Mo 0.05%, B 0.0001%, N 0.005%, O 0.002%, Al
0.005%, Mg 0.001%, Zr 0.01%, surplus Fe；Having a size of in 0.5~5 μm of field trash in steel plate, Ti-Mg-
Zr-O-Mn-S complex inclusion quantity accounts for 40%；Having a size of in 0.02~0.5 μm of field trash in steel plate, MgO type field trash
Quantity accounts for 35%；There are the carbonitride precipitates of V to be precipitated in steel plate on the field trash of 35% quantity.
The manufacturing method of above-mentioned steel plate: using silicomanganese aluminium pre-deoxidation during smelting molten steel, determines that Ti is added when oxygen is 20ppm
And V, further determine that Zr is added when oxygen is 10ppm in 1.5min, Mg be added when determining oxygen after 10min again for 5ppm, finally plus
Enter 0.005% N；Ti, V, Mg, Zr are added in the form of nitrided ferromanganese with the addition of alloy block mode, N；Stirring molten steel makes in steel
Having a size of in 0.5~5 μm of field trash, Ti-Mg-Zr-O complex inclusion quantity accounts for 55%, having a size of 5 μm or more of field trash
Quantity (2~5) × 104A/cm3；Other alloying element contents such as Nb, Cu, Ni, Cr, Mo are adjusted according to steel plate component requirements, at
Division lattice molten steel is cast into continuous casting billet；Continuous casting billet is heated to 1150 DEG C, keeps the temperature 240min, using austenite recrystallization area and not again
Two-stage control rolling in crystal region is rolled rear steel plate watering and is cooled down, 10 DEG C/s of cooling velocity, and 600 DEG C of final cooling temperature.
Steel plate thickness is 50mm, yield strength 435MPa, under 500~1500kJ/cm weld heat input, base material and hot shadow
Ring -20 DEG C of area 100~200J of impact flexibility.
Embodiment 2
In the present embodiment, suitable for the steel plate of ultra-large linear energy input welding, chemical component includes: C by weight percentage
0.15%, Si 0.1%, Mn 2.0%, Nb 0.05%, V 0.1%, Ti 0.015%, P 0.002%, S 0.005%, Cu
0.5%, Ni 0.5%, Cr 0.01%, Mo 0.5%, B 0.002%, N 0.008%, O 0.005%, Al 0.015%, Mg
0.0005%, REM (rare earth element) 0.01%, surplus Fe；Having a size of in 0.5~5 μm of field trash in steel plate, Ti-Mg-
REM-O-Mn-S complex inclusion quantity accounts for 30%；Having a size of in 0.02~0.5 μm of field trash in steel plate, MgO type field trash
Quantity account for 15%；There are the carbonitride precipitates of V to be precipitated in steel plate on the field trash of 50% quantity.
The manufacturing method of above-mentioned steel plate: using silicomanganese aluminium pre-deoxidation during smelting molten steel, determines to be added when oxygen is 200ppm
Ti and V further determines that REM is added when oxygen is 90ppm in 8min, determines that Mg is added when oxygen is 50ppm again after 50min, most
0.008% N is added afterwards；Ti, V, Mg, REM are added in a manner of line feeding, and N is added in the form of ferro-silicon nitride；Stirring molten steel makes steel
In having a size of in 0.5~5 μm of field trash, Ti-Mg-REM-O complex inclusion quantity accounts for 45%, having a size of 5 μm or more of folder
Sundries quantity (4~6) × 104A/cm3；Other alloying elements such as Nb, Cu, Ni, Cr, Mo are adjusted according to steel plate component requirements to contain
Amount, ingredient qualification molten steel are cast into steel ingot；Heating Steel Ingots keep the temperature 100min, using austenite recrystallization area and not to 1250 DEG C
Two-stage control rolling in recrystallization zone is rolled rear steel plate watering and is cooled down, 10 DEG C/s of cooling velocity, and 700 DEG C of final cooling temperature；Steel plate carries out
Normalizing heat treatment, 950 DEG C of normalizing heating temperature, soaking time 30min.
Steel plate thickness is 100mm, yield strength 365MPa, under 500~1500kJ/cm weld heat input, base material and heat
- 20 DEG C of the zone of influence 100~200J of impact flexibility.
Typical field trash pattern and its at being grouped as shown in Figure 1, shape in steel as can be seen from Figure 1 in 2 steel of embodiment
It is precipitated at the composite precipitation of Ti-Mg-REM-O-Mn-S type complex inclusion and V carbonitride, shown field trash effectively promotees
Change into Intragranular Acicular Ferrite forming core, improves ultra-large linear energy input welding heat influence area toughness.
Embodiment the result shows that, the present invention pass through the control to field trash type various sizes of in steel plate, realize welding
Heat affected zone organization significantly refines.The adding technology that Ti, Zr, REM, Mg, V, N are controlled in smelting process is formed special in steel
Different inclusion distribution improves steel plate toughness and tenacity in combination with cooling controlling and rolling controlling process.Steel plate of the present invention be suitable for 500~
The welding of 1500kJ/cm ultra-large linear energy input, can meet the needs of fields such as building are to ultra-large linear energy input welding steel.
Claims (10)
1. a kind of steel plate suitable for ultra-large linear energy input welding, which is characterized in that by mass percentage, steel plate chemical component packet
It includes: C 0.06~0.16%, Si 0.1~0.3%, Mn 1.0~2.0%, Nb 0.01~0.05%, V 0.02~0.12%,
Ti 0.005~0.025%, P 0.001~0.008%, S 0.001~0.005%, Cu 0.01~0.5%, Ni 0.01~
0.5%, Cr 0.01~0.5%, Mo 0.01~0.5%, B 0.0001~0.003%, N 0.005~0.01%, O 0.001
~0.005%, Al 0.001~0.015%, Mg 0.0005~0.005% and Zr 0.001~0.025%, REM
One of 0.001~0.025%, surplus Fe；Having a size of in 0.5~5 μm of field trash in steel plate, Ti-Mg-M-O-Mn-S
Complex inclusion quantity accounts for 10% or more, and wherein M is one of Zr, REM.
2. the steel plate according to claim 1 suitable for ultra-large linear energy input welding, which is characterized in that having a size of 0.02 in steel plate
In~0.5 μm of field trash, MgO type the amount of inclusions accounts for 10% or more.
3. the steel plate according to claim 2 suitable for ultra-large linear energy input welding, which is characterized in that preferred, ruler in steel plate
In the very little field trash for being 0.02~0.5 μm, MgO type the amount of inclusions accounts for 20~50%.
4. the steel plate according to claim 1 suitable for ultra-large linear energy input welding, which is characterized in that 30% or more in steel plate
There are the carbonitride precipitates of V to be precipitated on field trash.
5. the steel plate according to claim 4 suitable for ultra-large linear energy input welding, which is characterized in that it is preferred, 40 in steel plate
There are the carbonitride precipitates of V to be precipitated on~70% field trash.
6. the steel plate according to claim 1 suitable for ultra-large linear energy input welding, which is characterized in that preferred, ruler in steel plate
In the very little field trash for being 0.5~5 μm, Ti-Mg-M-O-Mn-S complex inclusion quantity accounts for 30~60%.
7. it is according to claim 1 suitable for ultra-large linear energy input welding steel plate, which is characterized in that steel plate thickness be 50~
150mm, 300~500MPa of yield strength, under 500~1500kJ/cm weld heat input, base material and the punching of -20 DEG C of heat affected area
Hit toughness >=70J.
8. a kind of manufacturing method suitable for the steel plate of ultra-large linear energy input welding as described in claim 1, it is characterised in that: molten steel
The pre-deoxidation of silicomanganese aluminium is used in smelting process, determines that Ti and V is added when oxygen is 20~200ppm, it is further fixed within 1~10min
One of Zr or REM are added when oxygen is 10~100ppm, determines that Mg is added when oxygen is 5~50ppm again after 10~60min,
It is eventually adding the N of 0.005~0.01wt%；Ti, V, Mg, Zr or REM are added in a manner of alloy block or line feeding, N with nitrided ferromanganese,
The addition of the form of ferro-silicon nitride or vanadium nitride；Stirring molten steel makes in steel having a size of in 0.5~5 μm of field trash, Ti-Mg-Zr-O
Or Ti-Mg-REM-O complex inclusion quantity accounts for 10% or more, having a size of 5 μm or more of the amount of inclusions≤105A/cm3；Root
Other alloying element contents are adjusted according to steel plate component requirements, ingredient qualification molten steel is cast into continuous casting billet or ingot casting；Continuous casting billet or casting
Ingot is heated to 1150~1250 DEG C, 60~240min is kept the temperature, using austenite recrystallization area and Unhydrated cement two-stage control
Rolling is rolled rear steel plate watering and is cooled down, cooling velocity >=10 DEG C/s, and 500~700 DEG C of final cooling temperature.
9. it is according to claim 8 suitable for ultra-large linear energy input welding steel plate manufacturing method, which is characterized in that steel plate into
Row normalizing or Tempering and Quenching.
10. the manufacturing method of the steel plate according to claim 8 suitable for ultra-large linear energy input welding, which is characterized in that preferably
, steel plate thickness is 60~100mm, 350~450MPa of yield strength, under 500~1500kJ/cm weld heat input, base material
With -20 DEG C of heat affected area 100~200J of impact flexibility.
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Cited By (3)
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| CN112176147A (en) * | 2020-10-13 | 2021-01-05 | 五矿营口中板有限责任公司 | Manufacturing method of normalized thick steel plate suitable for large-wire welding |
| CN113046639A (en) * | 2021-03-11 | 2021-06-29 | 南京钢铁股份有限公司 | 460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof |
| CN114293097A (en) * | 2021-11-17 | 2022-04-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 500 MPa-grade niobium-titanium microalloyed weather-resistant B-shaped steel and production method thereof |
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| CN106756543A (en) * | 2016-12-12 | 2017-05-31 | 南京钢铁股份有限公司 | A kind of TMCP states low cost Large Heat Input Welding strength ship plate steel high and its manufacture method |
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| CN112176147A (en) * | 2020-10-13 | 2021-01-05 | 五矿营口中板有限责任公司 | Manufacturing method of normalized thick steel plate suitable for large-wire welding |
| CN112176147B (en) * | 2020-10-13 | 2021-06-08 | 五矿营口中板有限责任公司 | Manufacturing method of normalized thick steel plate suitable for large-wire welding |
| CN113046639A (en) * | 2021-03-11 | 2021-06-29 | 南京钢铁股份有限公司 | 460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof |
| CN114293097A (en) * | 2021-11-17 | 2022-04-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 500 MPa-grade niobium-titanium microalloyed weather-resistant B-shaped steel and production method thereof |
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