CN104379277B - A kind of twin crystal inducing plasticity steel and production method thereof - Google Patents
A kind of twin crystal inducing plasticity steel and production method thereof Download PDFInfo
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- CN104379277B CN104379277B CN201380030717.4A CN201380030717A CN104379277B CN 104379277 B CN104379277 B CN 104379277B CN 201380030717 A CN201380030717 A CN 201380030717A CN 104379277 B CN104379277 B CN 104379277B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 239000013078 crystal Substances 0.000 title claims abstract description 23
- 230000001939 inductive effect Effects 0.000 title claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 35
- 238000009628 steelmaking Methods 0.000 claims abstract description 28
- 238000009749 continuous casting Methods 0.000 claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims abstract description 16
- 238000001953 recrystallisation Methods 0.000 claims abstract description 16
- 238000005097 cold rolling Methods 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 37
- 230000008569 process Effects 0.000 claims description 31
- 229910052799 carbon Inorganic materials 0.000 claims description 27
- 229910052698 phosphorus Inorganic materials 0.000 claims description 22
- 229910052717 sulfur Inorganic materials 0.000 claims description 20
- 238000005204 segregation Methods 0.000 claims description 19
- 239000010955 niobium Substances 0.000 claims description 18
- 239000010936 titanium Substances 0.000 claims description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 16
- 229910052758 niobium Inorganic materials 0.000 claims description 16
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 239000011574 phosphorus Substances 0.000 claims description 16
- 239000002244 precipitate Substances 0.000 claims description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 15
- 229910052719 titanium Inorganic materials 0.000 claims description 15
- 229910052720 vanadium Inorganic materials 0.000 claims description 15
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 15
- 229910052723 transition metal Inorganic materials 0.000 claims description 14
- 150000003624 transition metals Chemical class 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 12
- 239000011572 manganese Substances 0.000 claims description 12
- 239000011593 sulfur Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 238000005275 alloying Methods 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 7
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- AFCIMSXHQSIHQW-UHFFFAOYSA-N [O].[P] Chemical compound [O].[P] AFCIMSXHQSIHQW-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 229910000937 TWIP steel Inorganic materials 0.000 abstract description 24
- 239000000463 material Substances 0.000 description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 229910000765 intermetallic Inorganic materials 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009851 ferrous metallurgy Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 208000020442 loss of weight Diseases 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- NTGONJLAOZZDJO-UHFFFAOYSA-M disodium;hydroxide Chemical compound [OH-].[Na+].[Na+] NTGONJLAOZZDJO-UHFFFAOYSA-M 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001995 intermetallic alloy Chemical group 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/0236—Cold 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
-
- 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
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/02—Superplasticity
-
- 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
- C21D2211/004—Dispersions; Precipitations
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of twin crystal inducing plasticity steel and production method thereof, described production method comprises the following steps: steel-making step, continuous casting step and steel rolling step；Under conditions of protective casting, perform described continuous casting step；Wherein, the condition of described protective casting is: using covering slag, carry out low overheat casting with 5 DEG C 10 DEG C, pulling rate is 0.5 to 1.5 m/min；In described steel rolling step, use cold rolling predeformation, and be by annealing close to perfect recrystallization temperature.Use such scheme, the present invention can provide a kind of yield strength more than 1000MPa, the uniform elongation TWIP steel more than 10%, be particularly suited for the special rolling-mill section application such as automobile, there is the highest market using value.
Description
Technical field
The present invention relates to Ferrous Metallurgy and metal material, in particular, a kind of twin crystal inducing plasticity
Steel and production method thereof.
Background technology
Steel-making is by oxidation reaction decarburization, intensification, the process of alloying, its main task be decarburization,
Deoxidation, heat up, remove gas and nonmetal inclusion, alloying, mainly include molten iron pretreatment, turn
The steps such as stove blowing, alloying, refine, continuous casting steel machine, steel rolling.
For steel, its deformation is divided into elastic deformation (external force is cancelled and can be recovered original form) and moulds
Property deformation (external force is cancelled and can not be recovered original form, and shape changes), when stress exceedes elastic pole
After limit, deformation increases very fast, now in addition to producing elastic deformation, also produces part plastic deformation.
After stress reaches B point, plastic strain sharply increases, and the chain-wales of a fluctuation occurs in curve, this
Plant phenomenon and be referred to as surrender.The maximum in this stage, minimum stress are called upper yield point and lower surrender
Point.Owing to the numerical value of lower yield point is relatively stable, therefore using it as the index of material drag, it is referred to as
Yield point or yield strength.
When after steel surrender to a certain extent, owing to internal grain rearranges, its resistance capacity to deformation
Improve again, although now deformation development is quickly, but can only improve along with the raising of stress,
Until stress reaches maximum.Hereafter, the ability of steel resistance to deformation substantially reduces, and at weakness
Bigger plastic deformation occurs, and test specimen cross section reduces rapidly herein, necking phenomenon occurs, until fracture
Destroy.Maximum stress value before steel are broken is referred to as strength degree or tensile strength.Hot strength
Refer to that material produces the stress value of maximum uniform plastic deformation under tensile stress.
The high manganese deformation twin inducing plasticity steel developed in recent years (Twinning Induced Plasticity,
TWIP steel), deformation process produces deformation twin there is TWIP effect, thus possess good
Mechanical performance, as having high tensile and high-ductility simultaneously.At present, in the world to TWIP steel
Research and development include first generation Fe-25Mn-Al-3Si-0.03C series, and second filial generation Fe-23Mn-0.6C system
Row.
Automotive field loss of weight and reduce gas discharge portion part, needs to have good while needing high-yield strength
Good formability, TWIP steel has wide practical use in terms of automobile loss of weight,
But, although TWIP steel has high intensity and a high-ductility, but with other AHSS ferrum
Comparing, the yield strength of TWIP steel is relatively low, about 200～400MPa, this factor limit its
The commercial applications of auto manufacturing.
Therefore, prior art existing defects, need to improve.
Summary of the invention
The technical problem to be solved is to provide a kind of novel twin crystal inducing plasticity steel and life thereof
Product method.
Technical scheme is as follows: the production method of a kind of twin crystal inducing plasticity steel, it include with
Lower step: steel-making step, continuous casting step and steel rolling step；Under conditions of protective casting, perform institute
State continuous casting step；Wherein, the condition of described protective casting is: uses covering slag, enters with 5 DEG C-10 DEG C
Row low overheat is cast, and pulling rate is 0.5 to 1.5 m/min；In described steel rolling step, use cold rolling
Predeformation, and it is being by annealing close to perfect recrystallization temperature.
Preferably, in described production method, in described steel rolling step, employing deflection is 10%-60%
Carry out predeformation cold rolling.
Preferably, in described production method, in described steel rolling step, including replying and partial, re-crystallization
Annealing process, its treatment temperature is between 550 to 700 degrees Celsius, and the process time is 100 to 1000
Second.
Preferably, in described production method, described steel-making step includes sulfur reduction phosphorus oxygen process, described
At the end of steel-making step, sulfur is less than 0.0025%, and phosphorus is less than 0.0025%, and total oxygen content is less than 0.0015%.
Preferably, in described production method, described steel-making step includes alloying process, and it adds total
Mass percent is at least one transition metal following of 0.01-2%: titanium, niobium, vanadium.
Preferably, in described production method, described steel rolling step includes metal precipitation process, described in roll
At the end of steel step, the volume fraction of transition metal precipitate phase is 1%-2%, size be 15nm extremely
150nm；Further, the volume fraction of metal precipitate phase Al (C, N) is 0.2%-0.5%, and size is
15nm to 150nm.
Preferably, in described production method, described protective casting uses covering slag to realize, covering slag
The mass percent of composition is: calcium oxide 30%-40%, silicon dioxide 30%-40%, aluminium sesquioxide
5%-10%, magnesium oxide 5%-10%, and surplus is sodium oxide and fluorine.
Preferably, in described production method, in described continuous casting step, use M-EMS control
System reduces column crystal ratio and increases equiaxed zone ratio, and strand equiaxed zone ratio is more than 70%, and solidification is last
End uses electromagnetic agitation, is used for so that continuous casting billet structure uniformly and reduces carbon, phosphorus and sulphur segregation, carbon center
Degree of segregation controls between 1.0-1.1, and phosphorus, sulfur center segregation degree control respectively between 1.0-1.15,
Manganese center segregation degree controls between 1.0-1.2.
The another technical scheme of the present invention is, a kind of twin crystal inducing plasticity steel, it uses arbitrary above-mentioned life
Prepared by product method, it include carbon 0.2-1.0%, manganese 10-25%, aluminum 0.02-1.0%, phosphorus < 0.0025%,
Sulfur < 0.0025%, nitrogen < 0.003%, and at least one mistake following that gross mass percentage ratio is 0.01-2%
Cross metallic element: titanium, niobium, vanadium, surplus is ferrum element.
Preferably, described twin crystal inducing plasticity steel comprises at least one element following and consumption thereof: titanium
0.01-1.2%, niobium 0.01-1.2%, vanadium 0.01-1.2%.
Using such scheme, the present invention can provide a kind of yield strength more than 1000MPa, uniformly prolongs
The rate of the stretching TWIP steel more than 10%, is particularly suited for the special rolling-mill section application such as automobile, has the highest
Market using value.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of production method of the present invention.
Detailed description of the invention
For the ease of understanding the present invention, below in conjunction with the accompanying drawings and specific embodiment, the present invention is carried out more
Detailed description.Accompanying drawing gives the preferred embodiment of the present invention.But, the present invention can be with
Many different forms realize, however it is not limited to the embodiment described by this specification.On the contrary, carry
Purpose for these embodiments is to make the understanding to the disclosure more thorough comprehensively.
It should be noted that when element is referred to as " being fixed on " another element, and it can directly exist
On another element or element placed in the middle can also be there is.When an element is considered as " connection "
Another element, it can be directly to another element or may be simultaneously present centering elements.
Term " vertical ", " level ", "left", "right" and the similar table that this specification is used
State for illustrative purposes only.
Unless otherwise defined, this specification is used all of technology and scientific terminology with belong to this
The implication that bright those skilled in the art are generally understood that is identical.Saying in the present invention in this specification
Term used in bright book is intended merely to describe the purpose of specific embodiment, is not intended to limit this
Invention.The term "and/or" that this specification is used includes one or more relevant Listed Items
Arbitrary and all of combination.
The invention belongs to Ferrous Metallurgy and metal material field, it is provided that a kind of yield strength exceedes
1000MPa, the uniform elongation TWIP steel production method more than 10%, especially improvement tradition TWIP
The production technology of steel, it is possible to its yield strength is brought up to more than 1000MPa, simultaneously uniform elongation
Production method more than 10%.One embodiment of the present of invention is, the life of a kind of twin crystal inducing plasticity steel
Product method, it comprises the following steps: steel-making step, continuous casting step and steel rolling step；At protective casting
Under conditions of, perform described continuous casting step；Wherein, the condition of described protective casting is: use protection
Slag, carries out low overheat casting with 5 DEG C-10 DEG C, and pulling rate is 0.5 to 1.5 m/min；Further, in institute
State in steel rolling step, use cold rolling predeformation.Preferably, steel-making step select tradition TWIP steel,
Tradition TWIP steel scrap or other materials.
As it is shown in figure 1, one embodiment of the present of invention is, the producer of a kind of twin crystal inducing plasticity steel
Method, it comprises the following steps: steel-making step, continuous casting step and steel rolling step；Continuous casting step is the most continuously
Cast steel step；Under conditions of protective casting, perform described continuous casting step；Wherein, described protection is watered
Casting condition be: use covering slag, carry out low overheat casting with 5 DEG C-10 DEG C, pulling rate be 0.5 to
1.5 m/min；In described steel rolling step, use cold rolling predeformation, and close to perfect recrystallization
Temperature is by annealing.Preferably, in the material of steel-making, including carbon < 1.0%, manganese < 25%,
Aluminum < 1.0%, phosphorus < 0.0025%, sulfur < 0.0025%, nitrogen < 0.003%, and gross mass percentage ratio < 2%
At least one transition metal following: titanium, niobium, vanadium, surplus be ferrum element and other participate in refining
The material of steel.Such as, according to the material of following steel-making goal setting steel-making, steel-making target includes carbon
0.2-1.0%, manganese 10-25%, aluminum 0.02-1.0%, phosphorus < 0.0025%, sulfur < 0.0025%, nitrogen < 0.003%,
And at least one transition metal following that gross mass percentage ratio is 0.01-2%: titanium, niobium, vanadium,
Surplus is ferrum element.
Preferably, steelmaking process reduces total oxygen content, and then the quantity of reduction steel grade field trash, simultaneously
S, P mass percent making steel grade controls below 0.0025%, total oxygen content 0.0015% with
Under.Casting process uses low overheat, low pulling rate to cast as far as possible, the degree of superheat control 5 DEG C-10 DEG C it
Between, casting speed control is at 0.5/min-1.2m/min, and casting cycle uses M-EMS means simultaneously,
Making continuous casting billet structure uniform, strand central defect controls in 0-2 level, and equiaxed zone ratio is more than 70%.
The modes such as solidification end electromagnetic agitation cast so that material structure is more uniform, C element center segregation degree
Controlling between 1.0-1.1, two kinds of element center degree of segregation of P, S control between 1.0-1.15, Mn
Element center degree of segregation controls between 1.0-1.2.
Such as, it is achieved the process of low overheat casting includes: controlling steel inclusion, it is low overheated to prevent
The nozzle clogging of degree casting cycle；Accurately control casting process molten steel temperature in tundish stable；Steel-making one
The stability contorting of continuous casting rhythm of production.And for example, the condition of protective casting also includes using immersion protection
Pipe blowing argon gas.
Preferably, in described production method, described steel-making step includes sulfur reduction phosphorus oxygen process, described
At the end of steel-making step, sulfur is less than 0.0025%, and phosphorus is less than 0.0025%, and total oxygen content is less than 0.0015%.
Preferably, in described production method, described steel-making step includes alloying process, the conjunction of steel-making step
Aurification process adds titanium (Ti), niobium (Nb), vanadium (V) one or more than one transition metal,
These three transition elements is that precipitate forms element, forms carboritride analysis with carbon, nitrogen element
Go out thing, crystal grain thinning, improve the yield strength of material, the present invention at least uses one of which element
Forming transition metal precipitate, it adds alloy total mass fraction and controls transition gold in 0.01-2%, steel
The volume fraction belonging to precipitate is 1%-2%, and size is divided into for 15nm-150nm.When its mass fraction is little
In 0.01% time, precipitate amount is very few, and precipitate strengthening DeGrain, when mass fraction is more than 2%
Form substantial amounts of precipitate and deteriorate the plasticity of material.Such as, alloying process adds gross mass percentage ratio
At least one transition metal following for 0.01-2%: titanium, niobium, vanadium.Such as, described steel rolling step
Suddenly metal precipitation process is included, at the end of described steel rolling step, the volume integral of transition metal precipitate phase
Number is 1%-2%, and size is 15nm to 150nm；Further, metal precipitate phase Al (C, N)
Volume fraction is 0.2%-0.5%, and size is 15nm to 150nm.Carbon, nitrogen element are formed with aluminium element
Intermetallic compound Al (C, N) with crystal grain thinning, can improve intensity and plasticity, the aluminium element of material
Mass fraction should control at 0.01-1%, controls the volume fraction of intermetallic compound precipitate in steel and is
0.2%-0.5%, size is divided into for 15nm-100nm, can produce big gage when aluminium element content is more than 1%
Very little bigger field trash deteriorates the physical properties such as formability and the elongation percentage of material.
Preferably, casting process selects the covering slag of CaO/SiO2 type, keeps certain thickness melt cinder
Layer thickness, adds covering slag in time so that strand and crystallizer wall keep good greasy property, anti-
Only occur that bleed-out and the phenomenon such as face crack, slag inclusion occur, the weight percent of the concrete composition of covering slag
Ratio is: calcium oxide (CaO) 30%-40%, silicon dioxide (SiO2) 30%-40%, aluminium sesquioxide
(Al2O3, aluminium oxide) and 5%-10%, magnesium oxide (MgO) 5%-10%, remaining is sodium monoxide
(Na2O, sodium oxide) and fluorine (F).Such as, in described continuous casting step, described protective casting uses
Covering slag realizes, and the mass percent of the composition of covering slag is: calcium oxide 30%-40%, silicon dioxide
30%-40%, aluminium sesquioxide 5%-10%, magnesium oxide 5%-10%, and surplus is sodium oxide and fluorine.
Such as, the mass percent of the composition of covering slag is: calcium oxide 32%, silicon dioxide 38%, three oxygen
Change two aluminum 8%, magnesium oxide 10%, and sodium oxide 10% and fluorine 2%.And for example, the composition of covering slag
Mass percent be: calcium oxide 39%, silicon dioxide 34%, aluminium sesquioxide 5%, magnesium oxide
9%, and sodium oxide 4% and fluorine 9%.Preferably, in described continuous casting step, use crystallizer electromagnetism
Mixing control reduce column crystal ratio increase equiaxed zone ratio, strand equiaxed zone ratio more than 70%,
Solidification end uses electromagnetic agitation, is used for so that continuous casting billet structure uniformly and reduces carbon, phosphorus and sulphur segregation,
Carbon center's degree of segregation controls between 1.0-1.1, and phosphorus, sulfur center segregation degree control respectively at 1.0-1.15
Between, manganese center segregation degree controls between 1.0-1.2.
Preferably, in described production method, in described steel rolling step, employing deflection is 10%-60%
Carry out predeformation cold rolling.Due to the super-high-plasticity of TWIP steel, increase prestrain and sacrifice a certain amount of moulding
Property to improve TWIP steel yield strength be a kind of effective strengthening means, cold rolling by 10%-60%
Prestrain can significantly improve the yield strength of material, during more than 60% prestrain, can cause two problems,
One is that the work hardening rate of material drastically reduces, and the plasticity of material such as elongation percentage reduces, and two is material
Anisotropic increases, thus the processability of material weakens.Preferably, using deflection is 50% to enter
Row predeformation is cold rolling.
And/or, in described steel rolling step, including replying and partial, re-crystallization annealing process, it processes temperature
Degree is between 550 to 700 degrees Celsius, and the process time is 100 to 1000 seconds.In order to reduce prestrain
The counter productive brought to material property, is replied by increase and partial, re-crystallization continuous annealing operation is come
Improve material property, reply and partial, re-crystallization annealing temperature is between 550 DEG C-700 DEG C, close
The perfect recrystallization lowest temperature of steel, the process time is 100s-1000s.After process terminates, die portions
Recrystallization, in crystal, dislocation density drastically declines, owing to mechanical twin has preferable heat stability,
Change hardly in this temperature range, it will obtain optimal yield strength and elongation percentage.Temperature
During more than 700 DEG C, being susceptible to perfect recrystallization, work hardening rate reduces, and the yield strength of material is anxious
Reducing sharply few, when temperature is less than less than 550 DEG C, in crystal, dislocation density is too high, the plasticity of material with become
Shape is the most poor.
Another example is, one has yield strength more than 1000MPa, uniform elongation 10% with
On TWIP steel production method, by harm element, total oxygen content being controlled, even at steelmaking process
Casting process uses protective casting, selects suitable component covering slag, uses transition metal and intermetallic alloy
Form precipitate strengthening and cold rolling predeformation, come close to techniques such as perfect recrystallization temperature degeneration process
Improve the comprehensive mechanical property of TWIP.Wherein, TWIP steel controls at steelmaking process terminal S
Less than 0.0025%, P control below 0.0025%, and total oxygen content controls below 0.0015%.Excellent
Choosing, TWIP steel uses 5 DEG C of-10 DEG C of low overheats casting in casting process, takes protective casting to arrange
Executing, using M-EMS to control to reduce column crystal ratio increases equiaxed zone ratio, strand isometry
Brilliant ratio is more than 70%, and solidification end uses electromagnetic agitation so that continuous casting billet structure is uniform, subtracts simultaneously
Few carbon, phosphorus and sulphur segregation, strand central defect macroscopic view is graded at 0-2 level, C element center segregation degree
Controlling between 1.0-1.1, two kinds of element segregation degree of P, S control between 1.0-1.15, Mn element
Center segregation degree controls between 1.0-1.2.Wherein, it is preferred that TWIP steel is carrying out deflection
10%-60% cold rolling predeformation process, this process significantly improves the yield strength of TWIP steel.Wherein,
Preferably, it is 0.2%-0.5% that TWIP steel has volume fraction, and size distribution is that 10-150 nanometer is at base
Equally distributed transition intermetallic compounds precipitate phase Al (C, N) in soma.Wherein, it is preferred that
TWIP steel has volume fraction to be 1%-2%, and size distribution is that 10-100 nanometer is uniform in matrix
Distribution intermetallic compound precipitate phase Ti Nb V (C, N).Wherein, it is preferred that reply and portion
Point recrystallization annealing treatment temperature is between 550 DEG C-700 DEG C, at a temperature of the perfect recrystallization of steel
Limit, the process time is 100s-1000s.Preferably, the chemical composition of TWIP steel represents with mass fraction
For: carbon (C): 0.2-1.0%, manganese (Mn): 10-25%, aluminum (Al): 0.02-1.0%, phosphorus (P)
< 0.0025%, sulfur (S) < 0.0025%, nitrogen (< 0.003%), containing at least one alloying element following:
Titanium (Ti): 0.01-1.2%, niobium (Nb): 0.01-1.2, vanadium (V): 0.01-1.2%, remaining is ferrum
Element.
And for example, the invention belongs to Ferrous Metallurgy and metal material field, it is provided that a kind of yield strength exceedes
1000MPa, the simultaneously uniform elongation TWIP steel production method more than 10%.It is in steel-making step
Controlling harm element and total oxygen content, casting process selects suitable component covering slag, and uses protection to water
Casting and low overheat low pulling rate casting process, use transition metal and intermetallic compound precipitation strength with
And cold rolling predeformation, improve TWIP's close to techniques such as perfect recrystallization temperature continuous annealing process
Mechanical property so that it is yield strength is more than 1000MPa, and uniform elongation is more than 10%.
The most again for an embodiment, it is with chemical composition as Fe-22%Mn-0.6%C-1%Al-0.5%V
TWIP steel be objective for implementation, steelmaking process makes S, P element mass fraction control respectively
0.0025%, casting process uses low overheat to be 10 DEG C, pulling rate is that 0.8m/min carries out protective casting,
Continuous casting billet is placed in the heating furnace of 1200 DEG C heating 1 hour, and then carrying out finishing temperature is 900 DEG C
Hot rolling, rolls the thin plate of 3.5mm, and coiling temperature is 650 DEG C, then carries out pre edformation 60%
Cold-rolled process, lamella thickness becomes 1.4mm, carries out at continuous annealing in the continuous annealing furnace of 750 DEG C
Reason 1000s, materialses on cold rolling base and carries out the experiment of traditional One Dimensional Quasi static stretch and microstructure
Characterize.
Test records the hot strength of sample more than 1150MPa, and yield strength, more than 1000MPa, is prolonged
Rate of stretching, more than 15%, is distributed in steel matrix group by tem observation to a size of 20-100 nano-diffusion
Knitting middle V (C, N) and Al (C, N) precipitate, its volume fraction is respectively 1.2% and 0.3%.So
After carry out 5%, 8%, 12%, the tension test of 15% 4 kind of differently strained level, characterize strain deformation
After microstructure, find that the deformation process under differently strained level has the deformation twin of certain density
Produce, microstructure does not finds after stretcher strain martensite, shows that sample draw-texture process only produces
Having given birth to deformation twin, martensitic phase transformation does not occur, this steel mechanical property and microstructure meet automobile
Requirement by high crash energy absorption.Compared with traditional TWIP steel production method, the present embodiment obtains
The TWIP steel arrived, increase substantially the yield strength of material to more than 1000MPa, simultaneously material
Uniform elongation controls more than 10%, is a kind of ideal auto industry material, also can be wide
General it is applied to in other demand industries of special steel material.
Another embodiment of the present invention is, a kind of twin crystal inducing plasticity steel, it include carbon 0.2-1.0%,
Manganese 10-25%, aluminum 0.02-1.0%, phosphorus < 0.0025%, sulfur < 0.0025%, nitrogen < 0.003%, Yi Jizong
Mass percent is at least one transition metal following of 0.01-2%: titanium, niobium, vanadium, surplus is
Ferrum element；Such as, gross weight is 1000kg, containing the carbon of 2 to 10kg, and the manganese of 100 to 250kg,
By that analogy.Ratio involved by various embodiments of the present invention, if no special instructions, is mass percent.
And for example, a kind of twin crystal inducing plasticity steel, it uses arbitrary aforementioned production method to prepare, and it includes carbon
0.2-1.0%, manganese 10-25%, aluminum 0.02-1.0%, phosphorus < 0.0025%, sulfur < 0.0025%, nitrogen < 0.003%,
And at least one transition metal following that gross mass percentage ratio is 0.01-2%: titanium, niobium, vanadium,
Surplus is ferrum element.Preferably, described twin crystal inducing plasticity steel comprise at least one element following and
Consumption: titanium 0.01-1.2%, niobium 0.01-1.2%, vanadium 0.01-1.2%, such as, comprise 0.1% titanium,
The niobium of 0.5% and the vanadium of 0.63%；And for example, comprise the titanium of 1.1% and the niobium of 0.8%, and for example, comprise
The niobium of 1.0% and the vanadium of 0.2%.Titanium, niobium, the oeverall quality percentage ratio of vanadium are 0.01-2%.
Further, embodiments of the invention it is also possible that each technical characteristic of the various embodiments described above,
It is mutually combined twin crystal inducing plasticity steel and the production method thereof of formation.
It should be noted that above-mentioned each technical characteristic continues to be mutually combined, formed the most enumerated above
Various embodiments, are accordingly to be regarded as the scope that description of the invention is recorded；Further, to ordinary skill
For personnel, can be improved according to the above description or be converted, and all these modifications and variations are all
The protection domain of claims of the present invention should be belonged to.
Claims (6)
1. the production method of a twin crystal inducing plasticity steel, it is characterised in that comprise the following steps: steel-making step, continuous casting step and steel rolling step；
Under conditions of protective casting, perform described continuous casting step；Wherein, the condition of described protective casting is: using covering slag, carry out low overheat casting with 5 DEG C-10 DEG C, pulling rate is 0.5 to 1.5 m/min；
In described steel rolling step, use cold rolling predeformation, and make annealing treatment when close to perfect recrystallization temperature；
In described steel rolling step, deflection is used to be that 10%-60% carries out predeformation cold rolling；
In described steel rolling step, including replying and partial, re-crystallization annealing process, its treatment temperature is between 550 to 700 degrees Celsius, and the process time is 100 to 1000 seconds；
The chemical composition of described steel-making step objective for implementation is: 22%Mn, 0.6%C, 1%Al, 0.5%V, 0.0025%S, 0.0025%P, and surplus is ferrum element.
Production method the most according to claim 1, it is characterised in that described steel-making step includes sulfur reduction phosphorus oxygen process, at the end of described steel-making step, sulfur is less than 0.0025%, and phosphorus is less than 0.0025%, and total oxygen content is less than 0.0015%.
Production method the most according to claim 1, it is characterised in that described steel-making step includes alloying process, its interpolation gross mass percentage ratio is at least one transition metal following of 0.01-2%: titanium, niobium, vanadium.
Production method the most according to claim 3, it is characterised in that described steel rolling step includes metal precipitation process, at the end of described steel rolling step, the volume fraction of transition metal precipitate phase is 1%-2%, and size is 15nm to 150nm；Further, the volume fraction of metal precipitate phase Al (C, N) is 0.2%-0.5%, and size is 15nm to 150nm.
Production method the most according to claim 1; it is characterized in that; described protective casting uses covering slag to realize; the mass percent of the composition of covering slag is: calcium oxide 30%-40%, silicon dioxide 30%-40%, aluminium sesquioxide 5%-10%, magnesium oxide 5%-10%, and surplus is sodium oxide and fluorine.
Production method the most according to claim 1, it is characterized in that, in described continuous casting step, using M-EMS to control to reduce column crystal ratio and increase equiaxed zone ratio, strand equiaxed zone ratio is more than 70%, and solidification end uses electromagnetic agitation, for making continuous casting billet structure uniformly and reducing carbon, phosphorus and sulphur segregation, carbon center's degree of segregation controls between 1.0-1.1, and phosphorus, sulfur center segregation degree control respectively between 1.0-1.15, and manganese center segregation degree controls between 1.0-1.2.
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| CN106929756B (en) * | 2015-12-29 | 2020-03-17 | 香港大学深圳研究院 | Bearing steel and preparation method thereof |
| WO2017203314A1 (en) * | 2016-05-24 | 2017-11-30 | Arcelormittal | Twip steel sheet having an austenitic matrix |
| CN108624741B (en) * | 2017-03-23 | 2019-10-22 | 中国科学院金属研究所 | Have both high thermal stability, high intensity, high-ductility multiphase TWIP steel preparation method |
| CN111383861B (en) * | 2018-12-28 | 2022-06-17 | 东莞科力线材技术有限公司 | Magnetic conductive material for electromagnetic relay and preparation method thereof |
| FR3100144B1 (en) * | 2019-09-04 | 2021-10-01 | Safran Aircraft Engines | PROCESS FOR MANUFACTURING A METAL PART LIMITING THE APPEARANCE OF RECRISTALLIZED GRAINS IN THE SAID PART |
| CN112233735B (en) * | 2020-09-07 | 2022-04-19 | 包头钢铁（集团）有限责任公司 | Design method for chemical components of pearlitic rail steel |
| CN113684411A (en) * | 2021-08-26 | 2021-11-23 | 江苏联峰实业有限公司 | Method for solving 400 MPa-level Nb-containing steel bar non-yield platform |
| CN114703417B (en) * | 2022-04-11 | 2022-12-02 | 常州大学 | Method for preparing superfine-grain high-toughness medium manganese steel based on TWIP effect and microalloy precipitation |
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| KR101130718B1 (en) * | 2004-12-28 | 2012-03-28 | 주식회사 포스코 | Method for manufacturing high Manganese steel by the twin roll strip casting process |
| EP2090668A1 (en) * | 2008-01-30 | 2009-08-19 | Corus Staal BV | Method of producing a high strength steel and high strength steel produced thereby |
| CN101543837B (en) * | 2008-03-24 | 2012-02-29 | 宝山钢铁股份有限公司 | Method for manufacturing Fe-Mn-C series high-manganese steel thin strip by continuous casting and tandem rolling |
| KR101020546B1 (en) * | 2008-07-18 | 2011-03-09 | 현대자동차주식회사 | Ultra-high strength twip steel sheets and the method thereof |
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| CN102400036B (en) * | 2010-09-07 | 2014-07-09 | 鞍钢股份有限公司 | Twin induced plastic steel with high elongation percentage and high hole expansion rate and manufacture method thereof |
| CN102312158B (en) * | 2011-09-13 | 2013-11-20 | 上海交通大学 | Nb, Ti alloyed low-carbon high-intensity high-plasticity TWIP steel and preparation method thereof |
| CN102330019A (en) * | 2011-10-28 | 2012-01-25 | 上海大学 | Preparation method for vanadium-containing twin crystal induced plastic steel with low carbon, high strength and high plasticity |
| CN102392183A (en) * | 2011-10-31 | 2012-03-28 | 柳州钢铁股份有限公司 | Method for producing niobium-containing micro alloy steel |
| KR101371959B1 (en) * | 2011-11-15 | 2014-03-10 | 주식회사 포스코 | Mold flux for casting TWIP with high Al content and method for producing TWIP using the same |
| CN102690936A (en) * | 2012-06-06 | 2012-09-26 | 上海大学 | Method for increasing strength and yield ratio of carbon-containing twin induced plasticity steel |
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| CN103060685A (en) * | 2013-01-08 | 2013-04-24 | 舞阳钢铁有限责任公司 | 17MnNiVNbDR steel plate for tank car, and its production method |
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