CN104379791A - Manganese-containing steel and production method therefor - Google Patents
Manganese-containing steel and production method therefor Download PDFInfo
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- CN104379791A CN104379791A CN201380030742.2A CN201380030742A CN104379791A CN 104379791 A CN104379791 A CN 104379791A CN 201380030742 A CN201380030742 A CN 201380030742A CN 104379791 A CN104379791 A CN 104379791A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000011572 manganese Substances 0.000 title claims abstract description 19
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 title abstract description 20
- 239000010959 steel Substances 0.000 title abstract description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010936 titanium Substances 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 239000010955 niobium Substances 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 13
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 13
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000005864 Sulphur Substances 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 239000011574 phosphorus Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 53
- 238000000137 annealing Methods 0.000 claims description 31
- 229910000617 Mangalloy Inorganic materials 0.000 claims description 28
- 238000005096 rolling process Methods 0.000 claims description 26
- 238000005098 hot rolling Methods 0.000 claims description 25
- 239000004411 aluminium Substances 0.000 claims description 13
- 238000005097 cold rolling Methods 0.000 claims description 13
- 238000005275 alloying Methods 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910001566 austenite Inorganic materials 0.000 claims description 8
- 229910001563 bainite Inorganic materials 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 238000010306 acid treatment Methods 0.000 claims description 3
- 230000003811 curling process Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 229910000937 TWIP steel Inorganic materials 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 229910000734 martensite Inorganic materials 0.000 description 13
- 230000009466 transformation Effects 0.000 description 13
- 239000002244 precipitate Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 229910000794 TRIP steel Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000003381 stabilizer Substances 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses manganese-containing steel and a production method therefor. The manganese-containing steel comprises the following components, by weight, 0.2-1.0% of carbon, 5-15% of manganese, 0.02-1.0% of aluminum, phosphorus of being less than 0.025%, sulphur of being less than 0.025%, nitrogen of being less than 0.03% and 0.03%-2% of silicon. The manganese-containing steel also comprises at least one of the following alloy elements: 0.01-1.2% of titanium, 0.01-1.2% of niobium, 0.01-1.2% of vanadium, and the balance being iron element. The above scheme is employed, the steel material with TWI and TRIP effects is provided. Compared with present TWIP steel, the manganese-containing steel has a low manganese content, has advantages of high intensity, high plasticity and low cost, and has high market application values.
Description
Technical field
The present invention relates to ferrous metallurgy, in particular, a kind of containing manganese steel and production method thereof.
Background technology
High mangaenese steel mechanical twin induction high-ductility (the Twinning Induced Plasticity developed in recent years, TWIP) steel, in deformation process, produce mechanical twin there is TWIP effect, thus there is good mechanical property, as there is high-strength high-plasticity simultaneously, be applicable to manufacturing automotive field loss of weight and reducing gaseous emission parts, its shortcoming is that high Mn content can cause crackle in course of hot rolling to produce in a large number, further, because manganese is precious metal, thus increase production cost simultaneously.
Phase-change induced plastic (Transformation of Retained Austenite Induced Plasticity, TRIP) steel is in deformation process, martensitic transformation occurs and has TRIP effect, residual austenite, to martensitic transformation, increases intensity and the plasticity of this steel grade.This steel grade has good work hardening capacity simultaneously, there is good strain distribution and good deep drawability, the energy absorption capability that higher work hardening capacity and higher physical strength make this steel grade have, improve collision performance, its shortcoming is that yield strength and tensile strength are not high enough, unit elongation is also not as good as TWIP steel, and comprehensive process cementation index is high not as TWIP steel.
Therefore, be necessary to produce the steel simultaneously with TWIP and TRIP effect.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of newly containing manganese steel and production method thereof, there is TWIP and TRIP effect simultaneously.
Technical scheme of the present invention is as follows: a kind of containing manganese steel, it comprises following component by mass percentage: carbon 0.2-1.0%, manganese 5-15%, aluminium 0.02-1.0%, phosphorus <0.025%, sulphur <0.025%, nitrogen <0.03%, silicon 0.03-2%; Further, following at least one alloying element is also comprised: titanium 0.01-1.2%, niobium 0.01-1.2%, vanadium 0.01-1.2%; Surplus is ferro element.
Preferably, described containing in manganese steel, the total mass per-cent of described alloying element is no more than 2%.Described containing in manganese steel, such as, comprise the titanium of 0.1%, the niobium of 0.5% and 0.63% vanadium; 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%.The oeverall quality per-cent of titanium, niobium, vanadium is 0.01-2%.
Preferably, described containing in manganese steel, there is under normal temperature the phases such as austenite, bainite, ferrite matrix.
Another technical scheme of the present invention is, a kind of production method containing manganese steel, and it comprises the following steps: S1, continuously cast bloom are heated to 1050 DEG C to 1300 DEG C in process furnace, carry out hot rolling, and the finishing temperature of described hot rolling is at 800 DEG C to 1000 DEG C; S2, in the continuous annealing furnace of 850 DEG C to 950 DEG C, carry out intercritical annealing process; S3, curling process at temperature is no more than 700 DEG C; S4, at 200 DEG C to 400 DEG C temperature, carry out the warm-rolling that deflection is 10%-50%; S5, carry out the cold rolling of deflection 10%-50%; S6, carry out the continuous annealing process of more than 600 DEG C of temperature.
Preferably, in described production method, put step S2, S3 mutually.
Preferably, in described production method, in step S1, described continuously cast bloom is placed in the process furnace of 1200 DEG C and heats 1 hour.
Preferably, in described production method, in step S1, described hot rolling finishing temperature is 900 DEG C.
Preferably, in described production method, in step S3, described curling temperature is 650 DEG C.
Preferably, in described production method, in step S4, at 300 DEG C, carry out the warm-rolling of 20%-40% amount of rolling.
Preferably, in described production method, after step S4, also cleanup acid treatment is performed.
Adopt such scheme, the invention provides the steel simultaneously with TWIP and TRIP effect, relative to existing TWIP steel, its manganese content is low, has the advantage of high strength, high-ductility and low cost, has very high market using value.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of production method of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
A kind of containing manganese steel, it comprises following component by mass percentage: carbon 0.2-1.0%, manganese 5-15%, aluminium 0.02-1.0%, phosphorus <0.025%, sulphur <0.025%, nitrogen <0.03%, silicon 0.03-2%; Further, following at least one alloying element is also comprised: titanium 0.01-1.2%, niobium 0.01-1.2%, vanadium 0.01-1.2%; Surplus is ferro element.Such as, carbon (C): 0.2-1.0%, when carbon content is less than 0.2%, easy generation martensite, easily to crack in continuous casting and the operation of rolling and the plasticity of steel grade declines to some extent, when carbon content higher than 1.0% time, stacking fault energy increases sharply, and the deformation mechanism of material becomes dislocation glide by martensitic transformation and mechanical twin; In other words, when carbon content higher than 1.0% time, stacking fault energy increases sharply, and can not produce martensitic transformation in material deformation process, does not namely possess TRIP effect.Preferably, carbon content is 0.5 to 0.8%.Manganese (Mn): 5-15%, Fe content, in 5-15% scope, when Fe content is more than 15%, can causes crackle in course of hot rolling to produce in a large number, because manganese is precious metal, if the content of manganese is too high, increase production cost.Preferably, Fe content is 8 to 12%.Aluminium (Al): 0.02-1.0%, the content of aluminium element should control at 0.02-1.0%, because aluminium element is ferritic stabilizer, increases the plasticity that aluminium content improves material, increases the stacking fault energy of material simultaneously; Preferably, aluminium content is 0.1 to 0.85%.Phosphorus (P) <0.025%, sulphur (S) <0.025%, phosphoric and element sulphur are all harmful elements, should control below 0.025%.Nitrogen (<0.03%), nitrogen element and aluminium element form intermetallic compound AlxNy can crystal grain thinning, improve the intensity of material and plasticity, a large amount of intermetallic compound AlxNy can be produced when nitrogen element content is more than 0.04% and worsen the material physical properties such as the plasticity of material and unit elongation.Silicon (Si) 0.03-2%, element silicon is strong deoxidant element, play the effect of solution strengthening simultaneously, yield strength and the tensile strength of material can be improved, when its massfraction is more than 2%, to the attribute of material be reduced, and produce a large amount of oxide skins at material surface in the hot rolling, cannot remove at acid cleaning process afterwards.Preferably, silicone content is 0.1 to 1.7%.And, also containing following at least one alloying element: titanium (Ti): 0.01-1.2%, niobium (Nb): 0.01-1.2%, vanadium (V): 0.01-1.2%, titanium (Ti), niobium (Nb), vanadium (V) three kinds of elements are precipitate forming elements, with carbon, nitrogen element forms carbon nitrogen precipitate, crystal grain thinning, improve the yield strength of material, wherein a kind of element is at least used to form precipitate in the present invention, titanium (Ti) massfraction controls at 0.01-1.2%, when its massfraction is less than 0.01%, vanadium (V) controls below 1.2%, total mass Fractional domination less than 2%, precipitate amount is very few, precipitate strengthening effect is not obvious, when the precipitate that massfraction is a large amount of more than 1.2% formation worsens the plasticity of material.Such as, the size control of precipitate is at 15 nanometer-200 ran, and the strengthening effect of precipitate is the most obvious.Preferably, the size control of precipitate is in 50 nanometer to 100 nanometers.All the other are ferro element.Preferably, also containing molybdenum (Mo) 0.01-1.2%, it should be noted that ratio involved by various embodiments of the present invention if no special instructions, is mass percent.
Preferably, described containing in manganese steel, the total mass per-cent of described alloying element is no more than 2%.
Preferably, described containing in manganese steel, there is under normal temperature the phases such as austenite, bainite, ferrite matrix, be multi-phase Steels.
As shown in Figure 1, another embodiment of the present invention is, a kind of production method containing manganese steel, and it can produce the High-strength high-plasticity low cost Medium Manganese Steel simultaneously with TWIP and TRIP effect; This production method comprises the following steps.
S1, continuously cast bloom are heated to 1050 DEG C to 1300 DEG C in process furnace, carry out hot rolling, and the finishing temperature of described hot rolling is at 800 DEG C to 1000 DEG C; Such as, described continuously cast bloom is placed in the process furnace of 1050 DEG C to 1300 DEG C and heats 0.8 to 1.5 hour.And for example, described continuously cast bloom is placed in the process furnace of 1200 DEG C and heats 1 hour.Preferably, described hot rolling finishing temperature is 900 DEG C.Preferably, described continuously cast bloom comprises following component by mass percentage: carbon >0.2%, manganese >5%, aluminium >0.02%, phosphorus <0.025%, sulphur <0.025%, nitrogen <0.03%, silicon >0.03%; Further, following at least one alloying element is also comprised: titanium >0.01%, niobium >0.01% and/or vanadium >0.01%; Surplus is ferro element.Such as, described continuously cast bloom comprises following component by mass percentage: carbon 0.2-1.0%, manganese 5-15%, aluminium 0.02-1.0%, phosphorus <0.025%, sulphur <0.025%, nitrogen <0.03%, silicon 0.03-2%; Further, following at least one alloying element is also comprised: titanium 0.01-1.2%, niobium 0.01-1.2%, vanadium 0.01-1.2%; Surplus is ferro element.
Such as, continuously cast bloom is heated to 1050 DEG C to 1250 DEG C in process furnace, and temperature is more than 1250 DEG C, grain growth, casting billet surface forms oxide compound and will reduce the intensity of this steel grade, is heated beyond 125 DEG C containing manganese steel simultaneously, strand column crystal crystal boundary produces liquid phase, can crack in course of hot rolling.Heating temperature lower than 1050 DEG C, can not can not implement the hot rolling finishing temperature of rear operation simultaneously, and increases the burden of warm rolling stage, and the difficulty making to be rolled down to thickness in advance increases.
S2, in the continuous annealing furnace of 850 DEG C to 950 DEG C, carry out intercritical annealing process.
S3, curling process at temperature is no more than 700 DEG C; Such as, described curling temperature is 650 DEG C.An embodiment is, in described production method, puts step S2, S3 mutually.That is, the execution sequence of step S2, S3 is exchanged.Coiling temperature can not more than 700 DEG C, and more than 700 DEG C, hot-rolled sheet top layer forms thick oxide compound, is difficult to be removed at pickling process.
S4, at 200 DEG C to 400 DEG C temperature, carry out the warm-rolling that deflection is 10% to 50%; Carry out, in deflection 10%-50% rolling (warm-rolling) process, the mechanical twin of certain density being produced at 200 DEG C of-400 DEG C of temperature containing manganese steel.Preferably, at 300 DEG C, carry out the warm-rolling of 20% to 40% amount of rolling.Warm-rolling temperature is at 200 DEG C-400 DEG C, and the too high or too low stacking fault energy that all can make of temperature, not in the scope of 10kJ/m-35kJ/m, makes can not produce mechanical twin in rolling deformation process.Preferably, in described production method, after step S4, also cleanup acid treatment is performed.Pickling, remove cause because of hot rolling show oxide skin, then carry out cold rolling, according to the final mechanics of product, carry out the cold-rolled process of deflection 10%-50%, improve the yield strength of steel.
S5, carry out the cold rolling of deflection 10% to 50%.
S6, carry out the continuous annealing process of more than 600 DEG C of temperature.Cold rolling rear continuous annealing process is carried out on 600 DEG C, and when critical zone, continuous annealing temperature is too low, is difficult to obtain better working ability.Due at high temperature can not martensitic transformation be there is, tradition can be used for reference higher than anneal in recrystallization temperature in continuous annealing process, obtain higher thermal working ability.
Adopt above-mentioned steps, yield strength can be made more than 700MPa, tensile strength more than 950MPa, unit elongation be 20%-50% containing manganese steel.
An example is, should be containing production process of manganese steel: process furnace homogenizes process, hot rolling, intercritical annealing process, curling, warm-rolling, cold rolling, continuous annealing process.Such as, first continuously cast bloom carries out high temperature homogenization process at process furnace, then carries out hot rolling, and next carries out intercritical annealing process, then carries out curling, subsequently carries out warm-rolling, subsequently carries out cold rolling, finally carries out critical zone continuous annealing process.
Another example is, continuously cast bloom is placed in the process furnace of 1200 DEG C and heats 1 hour, then hot rolling is carried out, hot rolling finishing temperature is 900 DEG C, continuous annealing process is carried out in the continuous annealing furnace of 850 DEG C, coiling temperature is 650 DEG C, warm-rolling temperature carries out 20%-40% amount of rolling at 300 DEG C, then acid cleaning process is carried out, finally carry out deflection be 10% cold rolling, in the continuous annealing furnace of 850 DEG C, carry out continuous annealing process, on cold rolling base, sampling is carried out traditional unidimentional stretch experiment and is surrounded and watched the sign of tissue, the stretching of cold rolling drawn samples.
Another example is, continuously cast bloom is placed in the process furnace of 1250 DEG C and heats 0.9 hour, then hot rolling is carried out, hot rolling finishing temperature is 950 DEG C, in the continuous annealing furnace of 900 DEG C, carry out continuous annealing process, and coiling temperature is 680 DEG C, warm-rolling temperature carries out 22%-43% amount of rolling at 320 DEG C, then carry out acid cleaning process, finally carry out deflection be 20% cold rolling, in the continuous annealing furnace of 750 DEG C, carry out continuous annealing process.
Another example is, continuously cast bloom is placed in the process furnace of 1080 DEG C and heats 1.3 hours, then hot rolling is carried out, hot rolling finishing temperature is 830 DEG C, in the continuous annealing furnace of 920 DEG C, carry out continuous annealing process, and coiling temperature is 660 DEG C, warm-rolling temperature carries out 21%-39% amount of rolling at 240 DEG C, then carry out acid cleaning process, finally carry out deflection be 40% cold rolling, in the continuous annealing furnace of 790 DEG C, carry out continuous annealing process.
Another example is, performs following steps: (A) continuously cast bloom is heated to 1050 DEG C to 1300 DEG C in process furnace, then carries out hot rolling technology, and hot rolling finishing temperature is at 800 DEG C to 1000 DEG C, and coiling temperature can not more than 700 DEG C; (B) intercritical annealing process is carried out in the continuous annealing furnace of 850 DEG C-950 DEG C; (C) rolling that deflection is 10%-50% is carried out at 200 DEG C of-400 DEG C of temperature; (D) deflection 10%-50%'s is cold rolling; (E) the continuous annealing process more than 600 DEG C of temperature.
According to metallic substance fault energy calculation formula, above-mentioned each example containing the stacking fault energy under manganese steel material normal temperature at 5-2mJ/m
2, ensure that material is at normal temperatures in deformation process, and martensitic transformation occurs, residual austenite is to martensitic transformation, and produce TRIP effect, the stacking fault energy under 200 DEG C of-400 DEG C of high temperature is at 25-40mJ/m
2, ensure under this temperature range warm-rolling condition, material deformation process is by martensitic transformation to deformation twin transformation, and produce TWIP effect, warm-rolling terminates the mechanical twin producing certain density.
Adopt the various embodiments described above, can obtain intensity more than 950Mpa, yield strength more than 850Mpa, unit elongation more than 40% containing manganese steel, it has high crash energy absorption ability; Normal temperature undertissue is the phases such as residual austenite, bainite, ferrite matrix; Further, under normal temperature, deformation process can produce martensitic transformation, and residual austenite is to martensitic transformation.Find the mechanical twin of certain density in microtexture, find martensite after tensile deformation in microtexture, show that sample draw-texture process there occurs martensitic transformation, the steel of this performance meets the requirement of automobile by high crash energy absorption.
Compared with pure TWIP steel, what the various embodiments described above provided contains manganese steel, significantly reduces Fe content, aluminium content and silicone content, reduces raw materials cost and production cost, surface quality also obtains raising, and comparatively the former decreases for yield strength, tensile strength, unit elongation.Compared with pure TRIP steel, because produce mechanical twin in deformation process, improve work hardening rate and the plasticity of steel, compared to TRIP steel, its intensity and plasticity all significantly improve.
Further, embodiments of the invention can also be, a kind of containing manganese steel, it adopts arbitrary aforementioned production method to prepare, and it comprises following component by mass percentage: carbon 0.2-1.0%, manganese 5-15%, aluminium 0.02-1.0%, phosphorus <0.025%, sulphur <0.025%, nitrogen <0.03%, silicon 0.03-2%; Further, following at least one alloying element is also comprised: titanium 0.01-1.2%, niobium 0.01-1.2%, vanadium 0.01-1.2%; Surplus is ferro element.
Further, embodiments of the invention can also be, each technical characteristic of the various embodiments described above, be mutually combined to form containing manganese steel, and containing the production method of manganese steel, and adopt this production method to prepare containing manganese steel.
It should be noted that, above-mentioned each technical characteristic continues combination mutually, is formed not in above-named various embodiment, is all considered as the scope that specification sheets of the present invention is recorded; Further, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (10)
1., containing a manganese steel, it is characterized in that, comprise following component by mass percentage:
Carbon 0.2-1.0%, manganese 5-15%, aluminium 0.02-1.0%, phosphorus <0.025%, sulphur <0.025%, nitrogen <0.03%, silicon 0.03-2%;
Further, following at least one alloying element is also comprised: titanium 0.01-1.2%, niobium 0.01-1.2%, vanadium 0.01-1.2%;
Surplus is ferro element.
2., according to claim 1 containing manganese steel, it is characterized in that, the total mass per-cent of described alloying element is no more than 2%.
3., according to claim 2 containing manganese steel, it is characterized in that there is under normal temperature the phases such as austenite, bainite, ferrite matrix.
4., containing a production method for manganese steel, it is characterized in that, comprise the following steps:
S1, continuously cast bloom are heated to 1050 DEG C to 1300 DEG C in process furnace, carry out hot rolling, and the finishing temperature of described hot rolling is at 800 DEG C to 1000 DEG C;
S2, in the continuous annealing furnace of 850 DEG C to 950 DEG C, carry out intercritical annealing process;
S3, curling process at temperature is no more than 700 DEG C;
S4, at 200 DEG C to 400 DEG C temperature, carry out the warm-rolling that deflection is 10%-50%;
S5, carry out the cold rolling of deflection 10%-50%;
S6, carry out the continuous annealing process of more than 600 DEG C of temperature.
5. production method according to claim 4, is characterized in that, put step S2, S3 mutually.
6. production method according to claim 4 or 5, is characterized in that, in step S1, described continuously cast bloom is placed in the process furnace of 1200 DEG C and heats 1 hour.
7. production method according to claim 6, it is characterized in that, in step S1, described hot rolling finishing temperature is 900 DEG C.
8. production method according to claim 7, it is characterized in that, in step S3, described curling temperature is 650 DEG C.
9. production method according to claim 8, is characterized in that, in step S4, carry out the warm-rolling of 20%-40% amount of rolling at 300 DEG C.
10. production method according to claim 9, is characterized in that, after step S4, also perform cleanup acid treatment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/087912 WO2015077932A1 (en) | 2013-11-27 | 2013-11-27 | Manganese steel and production method thereof |
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| Publication Number | Publication Date |
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| CN104379791A true CN104379791A (en) | 2015-02-25 |
| CN104379791B CN104379791B (en) | 2016-11-09 |
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| CN201380030742.2A Expired - Fee Related CN104379791B (en) | 2013-11-27 | 2013-11-27 | A kind of containing manganese steel and production method thereof |
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| CN (1) | CN104379791B (en) |
| WO (1) | WO2015077932A1 (en) |
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| CN105256229A (en) * | 2015-10-29 | 2016-01-20 | 中北大学 | High-nitrogen nanometer bainite steel and preparing method thereof |
| CN106011637A (en) * | 2015-03-25 | 2016-10-12 | 纳米及先进材料研发院有限公司 | Transformation induced plasticity steel and manufacturing method thereof |
| CN106498292A (en) * | 2016-10-31 | 2017-03-15 | 东北大学 | One kind is containing manganese automotive sheet in V, Ti and Nb and preparation method thereof |
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| WO2022068201A1 (en) * | 2020-10-02 | 2022-04-07 | The University Of Hong Kong | Strong and ductile medium manganese steel and method of making |
| CN114438421A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Phase-change induced plasticity steel, and preparation method and application thereof |
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| CN106011637A (en) * | 2015-03-25 | 2016-10-12 | 纳米及先进材料研发院有限公司 | Transformation induced plasticity steel and manufacturing method thereof |
| CN105256229A (en) * | 2015-10-29 | 2016-01-20 | 中北大学 | High-nitrogen nanometer bainite steel and preparing method thereof |
| US11186890B2 (en) | 2016-08-24 | 2021-11-30 | The University Of Hong Kong | Two-phase steel and method for the fabrication of the same |
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| CN106498292A (en) * | 2016-10-31 | 2017-03-15 | 东北大学 | One kind is containing manganese automotive sheet in V, Ti and Nb and preparation method thereof |
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| CN108929991A (en) * | 2017-05-26 | 2018-12-04 | 宝山钢铁股份有限公司 | A kind of hot-dip potassium steel and its manufacturing method |
| CN107574376A (en) * | 2017-09-07 | 2018-01-12 | 北京科技大学 | A kind of high manganese TWIP/TRIP effects symbiosis steel of high strength and low cost plastotype and preparation method thereof |
| CN111321351A (en) * | 2020-04-23 | 2020-06-23 | 东北大学 | High-strength high-plasticity two-stage warm-rolling medium manganese steel and preparation method thereof |
| CN111893393A (en) * | 2020-08-20 | 2020-11-06 | 山东华星新材料科技有限公司 | Mo-Ti alloy wear-resistant medium manganese steel and preparation method thereof |
| WO2022068201A1 (en) * | 2020-10-02 | 2022-04-07 | The University Of Hong Kong | Strong and ductile medium manganese steel and method of making |
| CN114438421A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Phase-change induced plasticity steel, and preparation method and application thereof |
| CN112410681A (en) * | 2020-11-26 | 2021-02-26 | 燕山大学 | High-strength-ductility medium manganese steel and preparation method thereof |
| CN114703417A (en) * | 2022-04-11 | 2022-07-05 | 常州大学 | Method for preparing superfine-grain high-toughness medium manganese steel based on TWIP effect and microalloy precipitation |
| CN117551937A (en) * | 2023-11-17 | 2024-02-13 | 齐鲁工业大学(山东省科学院) | High-strength plastic product Fe-Mn-Al-Nb medium manganese steel and preparation method thereof |
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| Publication number | Publication date |
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| CN104379791B (en) | 2016-11-09 |
| WO2015077932A1 (en) | 2015-06-04 |
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