CN115747672A - Peritectic steel and preparation method thereof - Google Patents
Peritectic steel and preparation method thereof Download PDFInfo
- Publication number
- CN115747672A CN115747672A CN202211285634.7A CN202211285634A CN115747672A CN 115747672 A CN115747672 A CN 115747672A CN 202211285634 A CN202211285634 A CN 202211285634A CN 115747672 A CN115747672 A CN 115747672A
- Authority
- CN
- China
- Prior art keywords
- temperature
- steel
- percent
- controlling
- peritectic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 160
- 239000010959 steel Substances 0.000 title claims abstract description 160
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000005266 casting Methods 0.000 claims abstract description 41
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 37
- 239000010936 titanium Substances 0.000 claims abstract description 32
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 31
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000126 substance Substances 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims description 31
- 238000005097 cold rolling Methods 0.000 claims description 27
- 238000005096 rolling process Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000010583 slow cooling Methods 0.000 claims description 24
- 238000002791 soaking Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 14
- 238000000137 annealing Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 6
- 239000010955 niobium Substances 0.000 claims description 6
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 15
- 150000004767 nitrides Chemical class 0.000 abstract description 6
- 239000010960 cold rolled steel Substances 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 12
- 239000012535 impurity Substances 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 239000002253 acid Substances 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The application relates to peritectic steel and a preparation method thereof, wherein the chemical components of the peritectic steel comprise the following components in percentage by mass: titanium: 0.012-0.025 wt% and nitrogen not more than 0.006 wt%. By controlling the nitrogen content in the peritectic steel to be below 0.006 percent and adding 0.012-0.025 percent of titanium, N and Ti can form a compound, nitride and carbide precipitated at deep vibration marks can be reduced, the probability of casting blank cracks is reduced, and the cluster-shaped skin warping defect at the edge of a cold-rolled steel plate is reduced.
Description
Technical Field
The application relates to the field of low-alloy high-strength steel production, in particular to peritectic steel and a preparation method thereof.
Background
The cold rolled finished product coil of 590MPa grade automobile high-strength steel is easy to generate cluster-shaped warping defects, and the finished product delivery rate is seriously influenced. The cluster warping skin is in a cluster thin line shape along the rolling direction, the macroscopic appearance and the macroscopic appearance of the low-power electron microscope show that an obvious thin layer is separated or semi-separated from a matrix on the near-surface layer of the sheet, the defects mostly occur in a 100-300mm area on the edge of the surface of the cold-rolled steel sheet, and the roll passing exists and is distributed discontinuously.
At present, aiming at the cluster warping defect, the precipitation of nitride and carbonitride is mainly reduced by adopting a nitrogen fixation technology in the smelting process, but the solidification uniformity of peritectic steel is not considered, and the cluster warping defect on the surface of the steel coil cannot be completely eliminated only by nitrogen fixation.
Disclosure of Invention
The application provides peritectic steel and a preparation method thereof, which aim to solve the technical problem of poor effect in the existing nitrogen fixation and elimination of cluster warping defects.
In a first aspect, the present application provides a peritectic steel, the chemical composition of which comprises, in mass fraction: titanium: 0.012 to 0.025 percent and nitrogen less than or equal to 0.006 percent.
Further, the chemical components of the peritectic steel further comprise the following components in percentage by mass: niobium: 0.04 to 0.10 percent; carbon: 0.060% -0.150%; silicon: 0.08 to 0.33 percent; manganese: 1.20 to 2.20 percent; aluminum: 0.015 to 0.100 percent.
Further, the chemical components of the peritectic steel further comprise, in mass fraction: phosphorus is less than or equal to 0.020%; sulfur is less than or equal to 0.007 percent.
In a second aspect, the present application provides a method for preparing peritectic steel according to the first aspect, the method comprising:
when molten steel is refined, adding titanium into the molten steel, and controlling the nitrogen content in the molten steel;
when the molten steel is continuously cast, the covering slag adopts slow cooling type covering slag, and the alkalinity R and the viscosity of the covering slag are controlled;
and when the molten steel is continuously cast, controlling the casting blank drawing speed to be the set drawing speed to obtain a plate blank.
Furthermore, the alkalinity R of the casting powder is 1.1-1.4, and the viscosity of the casting powder is 0.08-0.11pa.s.
Further, the set drawing speed is 1.0-1.4m/min.
Further, the width d of the section of the casting blank is less than or equal to 1600mm, and the set pulling speed is 1.2-1.4m/min; the width d of the section of the casting blank is larger than 1600mm, and the set drawing speed is 1.0-1.2m/min.
Further, the preparation method further comprises the following steps:
heating the plate blank, and controlling the charging temperature, the discharging temperature and the heating time;
rolling the heated plate blank, and controlling the finishing temperature and the coiling temperature;
and carrying out cold rolling and annealing on the steel coil rolled by the plate blank, and controlling the total cold rolling compression ratio, the soaking temperature, the slow cooling temperature, the quick cooling temperature and the overaging treatment temperature.
Further, the charging temperature is 300-500 ℃, the discharging temperature is 1250-1300 ℃, and the heating time is 180-240 min; and/or
The finishing temperature is 830-910 ℃; and/or
The coiling temperature is 500-600 ℃; and/or
The cold rolling total compression ratio is 50-85%, the soaking temperature is 750-810 ℃, the slow cooling temperature is 600-660 ℃, and the fast cooling and overaging treatment temperature is 270-330 ℃.
In a third aspect, the present application provides an automotive high-strength steel made from the peritectic steel of the first aspect.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the peritectic steel provided by the embodiment of the application comprises the following chemical components in percentage by mass: titanium: 0.012% -0.025% of nitrogen, which is less than or equal to 0.006%; the nitrogen content in the peritectic steel is controlled to be below 0.006 percent, and 0.012 percent to 0.025 percent of titanium is added at the same time, so that N and Ti can form a compound, nitride and carbide precipitated at deep vibration marks can be reduced, the probability of casting blank cracks is reduced, and the cluster-shaped peeling defect at the edge of a cold-rolled steel plate is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a surface view of a peritectic steel and a slab obtained by a preparation method thereof provided in example 1 of the present application;
FIG. 2 is a surface view of peritectic steel obtained by the peritectic steel and the preparation method thereof provided in example 1 of the present application;
FIG. 3 is a surface view of a peritectic steel and a slab obtained by the method according to example 2 of the present application;
FIG. 4 is a surface view of peritectic steel obtained by the peritectic steel and the preparation method thereof provided in example 2 of the present application;
FIG. 5 is a schematic flow chart of a method for preparing peritectic steel according to an embodiment of the present disclosure;
FIG. 6 is a surface view of peritectic steel obtained by the peritectic steel and the preparation method thereof according to comparative example 1 of the present application;
FIG. 7 is a surface view of peritectic steel obtained by the peritectic steel and the preparation method thereof provided in comparative example 2 of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present application are commercially available or can be prepared by an existing method.
The 590MPa grade automobile high-strength steel cold-rolled finished product coil is easy to generate cluster-shaped skin-raising defects, and the finished product delivery rate is seriously influenced. The cluster warping skin is a cluster thin line shape along the rolling direction, the macroscopic appearance and the macroscopic appearance of the cluster warping skin show that an obvious thin layer is separated or semi-separated from a matrix on the surface layer of the plate, the defects mostly occur in a 100-300mm area at the edge of the surface of the cold-rolled steel plate, and the coil is continuously distributed.
At present, aiming at the cluster warping defect, the precipitation of nitride and carbonitride is mainly reduced by adopting a nitrogen fixation technology in the smelting process, but the solidification uniformity of peritectic steel is not considered, and the cluster warping defect on the surface of the steel coil cannot be completely eliminated only by nitrogen fixation.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
in a first aspect, the present application provides a peritectic steel, the chemical composition of which comprises, in mass fraction: titanium: 0.012-0.025 wt% and nitrogen not more than 0.006 wt%.
The peritectic steel provided by the embodiment of the application comprises the following chemical components in percentage by mass: titanium: 0.012 to 0.025 percent of nitrogen and less than or equal to 0.006 percent of nitrogen; the nitrogen content in the peritectic steel is controlled to be below 0.006 percent, and 0.012-0.025 percent of titanium is added at the same time, so that N and Ti can form a compound, nitride and carbide precipitated at deep vibration marks can be reduced, the probability of casting blank cracks is reduced, and the cluster-shaped skin warping defect at the edge of a cold-rolled steel plate is reduced.
The chemical composition of peritectic steel of the present application further includes Fe and unavoidable impurities.
As an implementation manner of the embodiment of the present invention, the chemical components of the peritectic steel further include, in terms of mass fraction: niobium: 0.04 to 0.10 percent; carbon: 0.060% -0.150%; silicon: 0.08 to 0.33 percent; manganese: 1.20 to 2.20 percent; aluminum: 0.015 to 0.100 percent.
In the application, in order to ensure the strength of peritectic steel, 0.04-0.10 percent of niobium is contained, the niobium is a strong carbon and nitrogen compound forming element, the precipitation of second phase particles formed by the niobium plays a role in grain refinement, but the second phase particles are precipitated in a large quantity along grain boundaries in a straightening region, and a pro-eutectoid ferrite (alpha phase) net film precipitated along the gamma grain boundaries in a gamma grain boundary and a gamma + alpha two-phase region weakens the bonding force of the grain boundaries, deteriorates high-temperature plasticity, enables a casting blank to generate surface cracks, mainly transverse cracks, and can effectively reduce the cracks by controlling the quantity of titanium and nitrogen. C is the most effective solid solution strengthening element and is the most important element for ensuring the hard phase content of the steel, si and Mn are solid solution strengthening elements, the strength of the steel can be obviously improved along with the increase of the content, but the excessively high Mn content can influence the plasticity and the impact property of the steel, the excessively high Si content can cause the cold formability and the welding property of the steel to be reduced, an oxide layer is easily formed on the surface of a steel plate to deteriorate the surface quality, and in order to ensure the strength, the formability and the welding property of the low-alloy high-strength steel, the C content is controlled to be 0.060-0.150%, the Si content is controlled to be 0.08-0.33%, and the Mn content is controlled to be 1.20-2.20%. Aluminum is a deoxidizing element, and the aluminum in the application represents the total aluminum content in steel, wherein the excessive content of the aluminum hardly meets the deoxidizing condition, and the excessive content of the aluminum deteriorates the weldability, so the Al content is controlled to be 0.015-0.100%.
As an implementation manner of the embodiment of the present invention, the chemical components of the peritectic steel further include, in mass fraction: phosphorus is less than or equal to 0.020%; sulfur is less than or equal to 0.007 percent.
In the present application, phosphorus is likely to significantly reduce the plasticity and toughness of steel, and therefore the content is required to be as low as possible, and the content of P by weight needs to be controlled to 0.02% or less. S is a harmful impurity element in the steel, so that the steel generates hot brittleness, the ductility and the toughness of the steel are reduced, cracks are caused during forging and rolling, and the weight percentage of the S is controlled to be less than 0.007%.
In the application, the steel plate with the specification has a good surface and no cluster warping, the performance reaches the yield strength Rel (300-450) MPa, the tensile strength Rm (590-700) MPa and the elongation El is more than or equal to 16%.
In a second aspect, the present application provides a method for preparing peritectic steel according to the first aspect, wherein the method comprises:
when molten steel is refined, adding titanium into the molten steel, and controlling the nitrogen content in the molten steel;
when the molten steel is continuously cast, the covering slag adopts slow-cooling type covering slag, and the alkalinity R and the viscosity of the covering slag are controlled;
and when the molten steel is continuously cast, controlling the casting blank drawing speed to be the set drawing speed to obtain a plate blank.
In the application, the refining process adopts N control and micro Ti treatment, so that N and Ti form a compound, nitrides and carbides separated out at deep vibration marks are reduced, high-temperature plasticity is improved, and casting blank cracks are reduced.
In the application, the peritectic steel primary blank shell is not uniformly solidified, and the temperature of the position corresponding to the discharge hole is high, so that the blank shell is firstly contacted with the copper plate and then separated from the copper plate, a large air gap is formed, and irregular deep vibration marks are generated. The vibration mark position forms a frequent position of a crack, and because crystal grains are coarse at the vibration mark position and elements such as P, S and the like are enriched, the deformation resistance is relatively low, and in addition, a notch effect is easily formed under the action of external force. Therefore, the uniformity of the primary solidified shell is improved by adopting the slow cooling type covering slag during the continuous casting of the molten steel and controlling the alkalinity R and the viscosity of the covering slag, thereby reducing the depth of the vibration mark.
In the application, the casting blank in the straightening area is under the action of straightening force, the inner arc is under the action of tensile stress, the casting blank is straightened by avoiding the low-plasticity area through optimizing the casting blank pulling speed, the precision of the casting machine is improved, and the action of additional stress is avoided.
As an implementation manner of the embodiment of the invention, the alkalinity R of the casting powder is 1.1-1.4, and the viscosity of the casting powder is 0.08-0.11pa.
In the application, the alkalinity R of the covering slag ranges from 1.1 to 1.4, the proportion of a glass body can be reduced, heat transfer is slowed down, and the purpose of reducing the depth of vibration marks is achieved. The viscosity of the covering slag is 0.08-0.11pa.s, the viscosity of the covering slag is low, the amount of the inflowing slag is large, the thickness of the formed slag film is favorable for increasing the thermal resistance, but the too low viscosity easily causes the uneven slag film flowing between the blank shell and the copper plate and the uneven heat conduction of the crystallizer, thereby causing the uneven thickness of the blank shell in a local area.
As an implementation manner of the embodiment of the invention, the set drawing speed is 1.0-1.4m/min.
As an implementation mode of the embodiment of the invention, the width d of the section of the casting blank is less than or equal to 1600mm, and the set pulling speed is 1.2-1.4m/min; the width d of the section of the casting blank is larger than 1600mm, and the set drawing speed is 1.0-1.2m/min.
In the application, the casting blank pulling speed is matched according to the casting blank section width d.
As an implementation manner of the embodiment of the present invention, the preparation method further includes:
heating the plate blank, and controlling the charging temperature, the discharging temperature and the heating time;
rolling the heated plate blank, and controlling the finish rolling temperature and the coiling temperature;
and carrying out cold rolling and annealing on the steel coil rolled by the plate blank, and controlling the total cold rolling compression ratio, the soaking temperature, the slow cooling temperature, the quick cooling temperature and the overaging treatment temperature.
In the application, the hot rolling adopts controlled rolling and controlled cooling processes to obtain a fine and uniformly dispersed second phase, and the hot rolled strip steel is rapidly cooled after final rolling to prevent crystal grains from growing and refine hot rolled crystal grains, so that the strength of a finished product is improved, but the size of the crystal grains is too fine, and the elongation of a cold rolled finished product can be reduced. In the cold rolling process, the steel plate is subjected to plastic deformation under the action of rolling force, the work hardening caused by the cold rolling plastic deformation is eliminated by adopting continuous annealing, the cold rolling texture is eliminated, the hardness and dislocation density of the transformed strengthening phase in the steel are reduced by overaging, and the comprehensive mechanical property of the optimized steel is improved.
As an implementation manner of the embodiment of the invention, the charging temperature is 300-500 ℃, the discharging temperature is 1250-1300 ℃, and the heating time is 180-240 min; and/or
The finishing temperature is 830-910 ℃; and/or
The coiling temperature is 500-600 ℃; and/or
The cold rolling total compression ratio is 50-85%, the soaking temperature is 750-810 ℃, the slow cooling temperature is 600-660 ℃, and the fast cooling and overaging treatment temperature is 270-330 ℃.
In the application, the cold rolling total compression ratio is 50-85% so as to achieve high forming performance. Increasing the coiling temperature promotes sufficient precipitation of precipitated phases, which is advantageous for lowering the recrystallization temperature, but high temperature coiling causes coarsening of the crystal grains of the hot rolled coil.
In a third aspect, the present application provides an automotive high-strength steel made from the peritectic steel of the first aspect.
In the application, the strength of the high-strength automobile steel prepared from the peritectic steel can reach 590MPa level.
The present application is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present application. The experimental methods of the following examples, which are not specified under specific conditions, are generally determined according to national standards. If there is no corresponding national standard, it is carried out according to the universal international standard, the conventional conditions, or the conditions recommended by the manufacturer.
Example 1
The schematic flow diagram of peritectic steel and the preparation method thereof is shown in fig. 5, and specifically comprises the following steps:
(1) The peritectic steel comprises the following chemical components in percentage by mass: c:0.11%, si:0.22%, mn:1.71%, P:0.011%, S:0.001%, alt:0.038%, nb:0.043%, ti:0.02%, N:0.0045 percent, and the balance of Fe and inevitable impurities;
(2) The preparation method comprises the following steps:
when molten steel is refined, adding titanium into the molten steel to ensure that the mass percent of the titanium in the molten steel is 0.02 percent, and controlling the nitrogen content in the molten steel to be 0.0045 percent;
when the refined molten steel is continuously cast, slow cooling type covering slag is adopted, and the alkalinity R of the covering slag is controlled to be 1.2, and the viscosity is controlled to be 0.10pa.s;
when molten steel is continuously cast, the width d of the section of a casting blank is 1500mm, and the casting speed of the casting blank is controlled to be 1.3m/min, so that a plate blank is obtained;
heating the plate blank, and controlling the charging temperature to be 350 ℃, the heating section temperature to be 1270 ℃, the soaking section temperature to be 1275 ℃, the discharging temperature to be 1280 ℃ and the heating time to be 190min;
rolling the heated plate blank by adopting 7-pass finish rolling, controlling the finish rolling temperature to be 888 ℃ and the coiling temperature to be 515 ℃;
carrying out acid washing, cold rolling and annealing on the steel coil rolled by the plate blank, and controlling the total cold rolling reduction ratio to be 50-85%, the soaking temperature to be 800 ℃, the slow cooling temperature to be 650 ℃, and the fast cooling and overaging treatment temperatures to be 295 ℃;
(3) And (3) performance testing: the size of the peritectic steel plate is 1.5mm multiplied by 1500mm, the yield strength is 380MPa, the tensile strength is 650MPa, and the elongation is 18%.
The surface pattern of the slab obtained in this example is shown in fig. 1, and the surface pattern of the peritectic steel obtained is shown in fig. 2.
Example 2
The schematic flow diagram of peritectic steel and the preparation method thereof is shown in fig. 5, and specifically comprises the following steps:
(1) The peritectic steel comprises the following chemical components in percentage by mass: c:0.11%, si:0.22%, mn:1.71%, P:0.011%, S:0.001%, alt:0.038%, nb:0.043%, ti:0.02%, N:0.0045 percent, and the balance of Fe and inevitable impurities;
(2) The preparation method comprises the following steps:
when molten steel is refined, adding titanium into the molten steel to ensure that the mass percent of the titanium in the molten steel is 0.02 percent, and controlling the nitrogen content in the molten steel to be 0.0045 percent;
when the refined molten steel is continuously cast, slow cooling type covering slag is adopted, and the alkalinity R of the covering slag is controlled to be 1.2, and the viscosity is controlled to be 0.08pa.s;
when molten steel is continuously cast, the width d of the section of a casting blank is 1700mm, and the casting blank drawing speed is controlled to be 1.0m/min, so that a plate blank is obtained;
heating the plate blank, and controlling the charging temperature to be 440 ℃, the soaking section temperature of the plate blank to be 1280 ℃, the discharging temperature to be 1297 ℃ and the heating time to be 210min;
rolling the heated plate blank by adopting 7-pass finish rolling, controlling the finish rolling temperature to be 900 ℃, and controlling the coiling temperature to be 520 ℃; (ii) a
Carrying out acid washing, cold rolling and annealing on a steel coil rolled by the plate blank, and controlling the total cold rolling reduction ratio to be 65%, the annealing temperature to be 800 ℃, the slow cooling temperature to be 650 ℃, and the fast cooling and overaging treatment temperatures to be 295 ℃;
(3) And (3) performance testing: the obtained peritectic steel plate has the dimensions of 2.0mm multiplied by 1700mm, the yield strength of 388MPa, the tensile strength of 667MPa and the elongation of 17.5 percent.
The surface pattern of the slab obtained in this example is shown in fig. 3, and the surface pattern of the peritectic steel obtained is shown in fig. 4.
Example 3
The schematic flow diagram of peritectic steel and the preparation method thereof is shown in fig. 5, and specifically comprises the following steps:
(1) The peritectic steel comprises the following chemical components in percentage by mass: c:0.06%, si:0.08%, mn:1.2%, P:0.02%, S:0.007%, alt:0.01%, nb:0.04%, ti:0.012%, N:0.004%, and the balance of Fe and inevitable impurities;
(2) The preparation method comprises the following steps:
when molten steel is refined, adding titanium into the molten steel to ensure that the mass percent of the titanium in the molten steel is 0.012 percent, and controlling the nitrogen content in the molten steel to be 0.004 percent;
when the refined molten steel is continuously cast, slow cooling type covering slag is adopted, and the alkalinity R of the covering slag is controlled to be 1.1, and the viscosity is controlled to be 0.08pa.s;
when molten steel is continuously cast, the width d of the section of a casting blank is 1600mm, and the casting blank drawing speed is controlled to be 1.2m/min to obtain a plate blank;
heating the plate blank, and controlling the charging temperature to be 300 ℃, the discharging temperature to be 1250 ℃ and the heating time to be 180min;
rolling the heated plate blank, controlling the finishing temperature to be 830 ℃, and controlling the coiling temperature to be 500 ℃;
performing acid pickling, cold rolling and annealing on the steel coil rolled by the plate blank, and controlling the total cold rolling reduction ratio to be 50%, the soaking temperature to be 750%, the slow cooling temperature to be 600 and the fast cooling and overaging treatment temperatures to be 270;
example 4
A schematic flow chart of peritectic steel and a preparation method thereof is shown in fig. 5, and specifically comprises the following steps:
(1) The peritectic steel comprises the following chemical components in percentage by mass: c:0.15%, si:0.33%, mn:2.2%, P:0.015%, S:0.006%, alt:0.1%, nb:0.1%, ti:0.025%, N:0.006 percent, and the balance of Fe and inevitable impurities;
(2) The preparation method comprises the following steps:
when molten steel is refined, adding titanium into the molten steel to ensure that the mass percent of the titanium in the molten steel is 0.025 percent, and controlling the nitrogen content in the molten steel to be 0.006 percent;
when the refined molten steel is continuously cast, slow cooling type covering slag is adopted, and the alkalinity R of the covering slag is controlled to be 1.4, and the viscosity is controlled to be 0.11pa.s;
when molten steel is continuously cast, the width d of the section of a casting blank is 1700mm, and the casting blank drawing speed is controlled to be 1.1m/min, so that a plate blank is obtained;
heating the plate blank, and controlling the charging temperature to be 500 ℃, the discharging temperature to be 1300 ℃ and the heating time to be 240min;
rolling the heated plate blank, controlling the finishing temperature to be 910 ℃ and the coiling temperature to be 600 ℃;
carrying out acid washing, cold rolling and annealing on a steel coil rolled by the plate blank, and controlling the total cold rolling reduction ratio to be 85%, the soaking temperature to be 810 ℃, the slow cooling temperature to be 660 ℃, and the fast cooling and overaging treatment temperatures to be 330 ℃;
example 5
The schematic flow diagram of peritectic steel and the preparation method thereof is shown in fig. 5, and specifically comprises the following steps:
(1) The peritectic steel comprises the following chemical components in percentage by mass: c:0.12%, si:0.1%, mn:2.0%, P:0.01%, S:0.004%, alt:0.05%, nb:0.07%, ti:0.018%, N:0.004%, and the balance of Fe and inevitable impurities;
(2) The preparation method comprises the following steps:
when molten steel is refined, adding titanium into the molten steel to enable the mass percent of the titanium in the molten steel to be 0.018%, and controlling the nitrogen content in the molten steel to be 0.004%;
when the refined molten steel is continuously cast, slow cooling type covering slag is adopted, and the alkalinity R of the covering slag is controlled to be 1.3, and the viscosity is controlled to be 0.10pa.s;
when molten steel is continuously cast, the width d of the section of a casting blank is 1400mm, and the casting blank pulling speed is controlled to be 1.4m/min, so that a plate blank is obtained;
heating the plate blank, and controlling the charging temperature to be 400 ℃, the discharging temperature to be 1275 ℃ and the heating time to be 210min;
rolling the heated plate blank, controlling the finish rolling temperature to be 870 ℃, and controlling the coiling temperature to be 550 ℃;
carrying out acid washing, cold rolling and annealing on the steel coil rolled by the plate blank, and controlling the total cold rolling reduction ratio to be 65%, the soaking temperature to be 780 ℃, the slow cooling temperature to be 630 ℃, and the fast cooling and overaging treatment temperatures to be 300 ℃;
comparative example 1
The schematic flow diagram of peritectic steel and the preparation method thereof is shown in fig. 5, and specifically comprises the following steps:
(1) The peritectic steel comprises the following chemical components in percentage by mass: c:0.12%, si:0.1%, mn:2.0%, P:0.01%, S:0.004%, alt:0.05%, nb:0.07%, ti:0.01%, N:0.007% and the balance of Fe and inevitable impurities;
(2) The preparation method comprises the following steps:
when molten steel is refined, adding titanium into the molten steel to ensure that the mass percent of the titanium in the molten steel is 0.01 percent, and controlling the nitrogen content in the molten steel to be 0.007 percent;
when the refined molten steel is continuously cast, slow cooling type covering slag is adopted, and the alkalinity R of the covering slag is controlled to be 0.9, and the viscosity is controlled to be 0.10pa.s;
when molten steel is continuously cast, the width d of the section of a casting blank is 1400mm, and the casting blank pulling speed is controlled to be 1.4m/min, so that a plate blank is obtained;
heating the plate blank, and controlling the charging temperature to be 400 ℃, the discharging temperature to be 1275 ℃ and the heating time to be 210min;
rolling the heated plate blank, and controlling the finish rolling temperature to be 870 ℃ and the coiling temperature to be 500 ℃;
pickling, cold rolling and annealing the steel coil rolled by the plate blank, controlling the total rolling reduction ratio to be 70%, and the soaking temperature to carry out pickling, cold rolling and annealing, and controlling the total rolling reduction ratio to be 65%, the soaking temperature to be 800 ℃, the slow cooling temperature to be 630 ℃, and the fast cooling and overaging treatment temperatures to be 290 ℃;
the edge warping defect of the actually produced finished steel coil is shown in fig. 6.
Comparative example 2
A schematic flow chart of peritectic steel and a preparation method thereof is shown in fig. 5, and specifically comprises the following steps:
(1) The peritectic steel comprises the following chemical components in percentage by mass: c:0.12%, si:0.1%, mn:1.8%, P:0.01%, S:0.004%, alt:0.05%, nb:0.07%, ti:0.01%, N:0.005% and the balance of Fe and inevitable impurities;
(2) The preparation method comprises the following steps:
when molten steel is refined, adding titanium into the molten steel to ensure that the mass percent of the titanium in the molten steel is 0.01 percent, and controlling the nitrogen content in the molten steel to be 0.005 percent;
when the refined molten steel is continuously cast, slow cooling type covering slag is adopted, and the alkalinity R of the covering slag is controlled to be 1.5, and the viscosity is controlled to be 0.13pa.s;
when molten steel is continuously cast, the width d of the section of a casting blank is 1450mm, and the casting blank drawing speed is controlled to be 1.4m/min, so that a plate blank is obtained;
heating the plate blank, and controlling the charging temperature to be 400 ℃, the discharging temperature to be 1275 ℃ and the heating time to be 210min;
rolling the heated plate blank, controlling the finish rolling temperature to be 880 ℃, and controlling the coiling temperature to be 500 ℃;
carrying out acid washing, cold rolling and annealing on a steel coil rolled by the plate blank, and controlling the total cold rolling reduction ratio to be 70%, the soaking temperature to be 800 ℃, the slow cooling temperature to be 630 ℃, and the fast cooling and overaging treatment temperatures to be 300 ℃;
the edge warping defect of the actually produced finished steel coil is shown in figure 7.
In summary, the peritectic steel and the preparation method thereof disclosed by the application are based on the surface cluster warping defect forming mechanism, comprehensively from the angles of improving the high-temperature plasticity and the solidification uniformity of a casting blank and improving the precision of a casting machine, and combined with process optimization regulation, 590 MPa-level automobile high-strength steel products with surface cluster warping and high surface quality are produced, the products have good surfaces and no cluster warping, the performance reaches the yield strength Rel (300-450) MPa, the tensile strength Rm (590-700) MPa, and the elongation El is more than or equal to 16%.
Various embodiments of the present application may exist in a range of forms; it is to be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the application; accordingly, the described range descriptions should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, it is contemplated that the description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the stated range, such as 1, 2, 3, 4, 5, and 6, as applicable regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any number (fractional or integer) recited within the range so indicated.
In the present application, unless otherwise specified, the use of directional words such as "upper" and "lower" specifically refer to the orientation of the figures in the drawings. In addition, in the description of the present specification, the terms "include", "includes" and the like mean "including but not limited to". In this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Herein, "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. As used herein, "at least one" means one or more, and "a plurality" means two or more. "at least one," "at least one of the following," or similar expressions, refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (one) of a, b, or c," or "at least one (one) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. Peritectic steel is characterized by comprising the following chemical components in percentage by mass: titanium: 0.012 to 0.025 percent and nitrogen less than or equal to 0.006 percent.
2. The peritectic steel according to claim 1, wherein the chemical composition of the peritectic steel further comprises, in mass fraction: niobium: 0.04 to 0.10 percent; carbon: 0.060% -0.150%; silicon: 0.08 to 0.33 percent; manganese: 1.20 to 2.20 percent; aluminum: 0.015% -0.100%.
3. Peritectic steel according to claim 1 or 2, characterized in that the chemical composition of the peritectic steel further comprises, in mass fraction: phosphorus is less than or equal to 0.020%; sulfur is less than or equal to 0.007%.
4. A method for producing peritectic steel according to any one of claims 1 to 3, characterized in that it comprises:
when molten steel is refined, adding titanium into the molten steel, and controlling the nitrogen content in the molten steel;
when the molten steel is continuously cast, the covering slag adopts slow-cooling type covering slag, and the alkalinity R and the viscosity of the covering slag are controlled;
and when the molten steel is continuously cast, controlling the casting blank drawing speed to be the set drawing speed to obtain a plate blank.
5. The preparation method according to claim 4, wherein the basicity R of the mold flux is 1.1-1.4, and the viscosity of the mold flux is 0.08-0.11pa.s.
6. The production method according to claim 4, wherein the set draw rate is 1.0 to 1.4m/min.
7. The preparation method according to claim 6, wherein the width d of the cross section of the casting blank is not more than 1600mm, and the set drawing speed is 1.2-1.4m/min; the width d of the section of the casting blank is larger than 1600mm, and the set drawing speed is 1.0-1.2m/min.
8. The method of manufacturing according to claim 4, further comprising:
heating the plate blank, and controlling the charging temperature, the discharging temperature and the heating time;
rolling the heated plate blank, and controlling the finish rolling temperature and the coiling temperature;
and carrying out cold rolling and annealing on the steel coil rolled by the plate blank, and controlling the total cold rolling compression ratio, the soaking temperature, the slow cooling temperature, the quick cooling temperature and the overaging treatment temperature.
9. The preparation method according to claim 8, wherein the charging temperature is 300 ℃ to 500 ℃, the discharging temperature is 1250 ℃ to 1300 ℃, and the heating time is 180min to 240min; and/or
The finishing temperature is 830-910 ℃; and/or
The coiling temperature is 500-600 ℃; and/or
The cold rolling total compression ratio is 50-85%, the soaking temperature is 750-810 ℃, the slow cooling temperature is 600-660 ℃, and the fast cooling and overaging treatment temperature is 270-330 ℃.
10. A high-strength steel for automobiles, characterized in that it is made of peritectic steel according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211285634.7A CN115747672A (en) | 2022-10-20 | 2022-10-20 | Peritectic steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211285634.7A CN115747672A (en) | 2022-10-20 | 2022-10-20 | Peritectic steel and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115747672A true CN115747672A (en) | 2023-03-07 |
Family
ID=85352264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211285634.7A Pending CN115747672A (en) | 2022-10-20 | 2022-10-20 | Peritectic steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115747672A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036939A (en) * | 2007-04-20 | 2007-09-19 | 攀枝花钢铁(集团)公司 | Control method for transverse cracks of vanadium-containing high-nitrogen steel continuous casting slab corners |
| KR20110088158A (en) * | 2010-01-28 | 2011-08-03 | 현대제철 주식회사 | Cold rolled steel sheet and manufacturing method thereof |
| CN103898407A (en) * | 2014-04-09 | 2014-07-02 | 武汉钢铁(集团)公司 | 600MPa hot-rolled ribbed steel bar and preparation method thereof |
| WO2015043411A1 (en) * | 2013-09-29 | 2015-04-02 | 宝山钢铁股份有限公司 | Cold-rolled duplex strip steel with high formability and preparation method therefor |
| CN106906409A (en) * | 2015-12-23 | 2017-06-30 | 本钢板材股份有限公司 | A kind of method for preventing cold rolling low-alloy high-strength steel edge upwarping defect |
| CN107385136A (en) * | 2017-06-15 | 2017-11-24 | 宝钢集团新疆八钢铁有限公司 | Axle housing steel BQK580 precipitate control methods |
| CN107838390A (en) * | 2017-10-27 | 2018-03-27 | 舞阳钢铁有限责任公司 | A kind of method for improving big cross section peritectic steel continuous casting billet quality |
| CN108070779A (en) * | 2016-11-13 | 2018-05-25 | 广东韶钢松山股份有限公司 | A kind of solderable fine grain, high strength degree structural steel and iron and its production method |
| CN110735080A (en) * | 2019-10-10 | 2020-01-31 | 南京钢铁股份有限公司 | Production method of steel multi-stage special container steel blank |
| CN112080690A (en) * | 2020-08-24 | 2020-12-15 | 马鞍山钢铁股份有限公司 | DC06 automobile plate hot-rolled strip steel and control method for edge warping defect thereof |
| CN112813355A (en) * | 2019-11-15 | 2021-05-18 | 上海梅山钢铁股份有限公司 | Method for reducing corner cracks of titanium-containing peritectic steel continuous casting slab |
| CN114182169A (en) * | 2021-11-22 | 2022-03-15 | 燕山大学 | Thick-wall large-caliber X80M-grade plate for hot-bending elbow and manufacturing method thereof |
-
2022
- 2022-10-20 CN CN202211285634.7A patent/CN115747672A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036939A (en) * | 2007-04-20 | 2007-09-19 | 攀枝花钢铁(集团)公司 | Control method for transverse cracks of vanadium-containing high-nitrogen steel continuous casting slab corners |
| KR20110088158A (en) * | 2010-01-28 | 2011-08-03 | 현대제철 주식회사 | Cold rolled steel sheet and manufacturing method thereof |
| WO2015043411A1 (en) * | 2013-09-29 | 2015-04-02 | 宝山钢铁股份有限公司 | Cold-rolled duplex strip steel with high formability and preparation method therefor |
| CN103898407A (en) * | 2014-04-09 | 2014-07-02 | 武汉钢铁(集团)公司 | 600MPa hot-rolled ribbed steel bar and preparation method thereof |
| CN106906409A (en) * | 2015-12-23 | 2017-06-30 | 本钢板材股份有限公司 | A kind of method for preventing cold rolling low-alloy high-strength steel edge upwarping defect |
| CN108070779A (en) * | 2016-11-13 | 2018-05-25 | 广东韶钢松山股份有限公司 | A kind of solderable fine grain, high strength degree structural steel and iron and its production method |
| CN107385136A (en) * | 2017-06-15 | 2017-11-24 | 宝钢集团新疆八钢铁有限公司 | Axle housing steel BQK580 precipitate control methods |
| CN107838390A (en) * | 2017-10-27 | 2018-03-27 | 舞阳钢铁有限责任公司 | A kind of method for improving big cross section peritectic steel continuous casting billet quality |
| CN110735080A (en) * | 2019-10-10 | 2020-01-31 | 南京钢铁股份有限公司 | Production method of steel multi-stage special container steel blank |
| CN112813355A (en) * | 2019-11-15 | 2021-05-18 | 上海梅山钢铁股份有限公司 | Method for reducing corner cracks of titanium-containing peritectic steel continuous casting slab |
| CN112080690A (en) * | 2020-08-24 | 2020-12-15 | 马鞍山钢铁股份有限公司 | DC06 automobile plate hot-rolled strip steel and control method for edge warping defect thereof |
| CN114182169A (en) * | 2021-11-22 | 2022-03-15 | 燕山大学 | Thick-wall large-caliber X80M-grade plate for hot-bending elbow and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 包燕平，王敏: "超低碳钢RH真空处理技术基础及应用", 30 November 2021, 冶金工业出版社, pages: 225 * |
| 本书编辑委员会: "《品种钢优特钢连铸900问》", 31 August 2010, 中国科学技术出版社, pages: 249 - 85 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104593674B (en) | Galvanizing ultra-low carbon baking hardening steel and its production method | |
| CN104928569B (en) | A kind of low density steel of 800MPa level high ductibility and its manufacture method | |
| CN110073024B (en) | Ultrahigh-strength steel sheet having excellent bending workability and method for producing same | |
| CN104726768B (en) | The excellent high tensile hot rolled steel sheet of surface quality and its manufacture method | |
| KR101461740B1 (en) | Hot rolled steel sheet having low deviation of mechanical property and thickness and excellent coating detachment resistance and method for manufacturing the same | |
| CN108796363A (en) | The great surface quality for adapting to large deformation and punch process covers aluminum substrate steel and its production method | |
| CN111424211B (en) | Weather-resistant steel for wide 700 MPa-grade hot-rolled container and manufacturing method thereof | |
| TW201315819A (en) | High-strength cold-rolled steel sheet with excellent deep-drawability and in-coil uniformity in material properties and method for manufacturing the same | |
| CN107385319A (en) | Yield strength 400MPa level Precision Welded Pipe steel plates and its manufacture method | |
| JP7482231B2 (en) | Low carbon, low cost, ultra-high strength multi-phase steel sheet/strip and manufacturing method thereof | |
| JP3879440B2 (en) | Manufacturing method of high strength cold-rolled steel sheet | |
| CN107513669A (en) | A kind of high-strength cold rolling square and rectangular pipe steel and its manufacture method | |
| JP5228963B2 (en) | Cold rolled steel sheet and method for producing the same | |
| CN108474084B (en) | Hot-rolled plated steel sheet having excellent workability and method for producing same | |
| KR101403262B1 (en) | Ultra high strength hot-dip plated steel sheet and method for manufacturing the same | |
| JP2024526248A (en) | TRIP steel and its manufacturing method, cold rolled steel sheet and hot-dip galvanized steel sheet | |
| JP5071125B2 (en) | High-strength cold-rolled steel sheet excellent in square tube drawing formability and shape freezing property, manufacturing method thereof, and automotive parts excellent in product shape | |
| CN114717478A (en) | Light high-strength steel and production method thereof | |
| CN107937811A (en) | Low temperature resistant 410MPa grades of steel plate for tall building of normalizing state | |
| CN115747672A (en) | Peritectic steel and preparation method thereof | |
| CN112400033B (en) | Hot-rolled plated steel sheet having high strength, high formability, and excellent bake hardenability, and method for producing same | |
| JP2001207244A (en) | Cold rolled ferritic stainless steel sheet excellent in ductility, workability and ridging resistance, and its manufacturing method | |
| CN107829025B (en) | thin-gauge dual-phase steel with good hole expanding performance and processing method thereof | |
| CN115852245B (en) | Cold-rolled bainite type weathering steel and preparation method thereof | |
| CN110541123B (en) | Cold-rolled strip steel for battery case and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |