CN112605360A - High-pulling-speed production method of sub-peritectic steel slab - Google Patents
High-pulling-speed production method of sub-peritectic steel slab Download PDFInfo
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- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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- B22D11/18—Controlling or regulating processes or operations for pouring
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- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/051—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having oscillating walls
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- 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
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- B22D11/111—Treating the molten metal by using protecting powders
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- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C—CHEMISTRY; METALLURGY
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The invention discloses a high-pulling-speed production method of a sub-peritectic steel plate blank, which sequentially comprises the steps of conveying liquid molten steel with qualified chemical components and temperature to a plate blank for continuous casting → the molten steel enters a tundish → the molten steel enters a crystallizer with periphery cooling and vibration → a casting flow with a liquid core enters a fan-shaped section at a certain speed, and runs while cooling → is completely solidified into a solid casting blank with a certain shape; the production method can realize stable production of the sub-peritectic steel plate blank when the high drawing speed is 1.6m/min, no steel leakage accident occurs, the surface of the casting blank has no longitudinal crack and dent defect, the center segregation of the casting blank is stably controlled to be B0.5-C1.5, the surface quality and the performance of the hot rolled coil are good, and the production requirement of the casting blank quality is met. In addition, the invention optimizes the rhythm matching of smelting-continuous casting-heating-rolling production and releases the productivity of the casting machine; meanwhile, the stable control of the quality of the casting blank and the cost reduction and efficiency improvement are promoted.
Description
Technical Field
The invention relates to the technical field of continuous casting steel in the metallurgical industry, in particular to a high-pulling-speed production method of a sub-peritectic steel slab.
Background
Along with the aggravation of steel enterprise homogenization competition, the cost control directly influences the market competitiveness of products, the aim of realizing high quality, high efficiency and high benefit is the perpetual pursuit of each large steel enterprise, and the realization of high drawing speed casting of the hypo-peritectic steel is one of important ways for improving the production efficiency and realizing cost reduction and efficiency improvement, wherein the hypo-peritectic steel mainly refers to steel grades with equivalent carbon Ceq between 0.08 and 0.15 percent, Mn more than or equal to 0.80 percent and containing microalloy elements such as Nb, V, Ti, Cu, P and the like; because the peritectic reaction occurs in the solidification process of the steel types with the components, the primary solidified shell shrinks violently; the quality defects such as surface cracks, deflection angle depressions and the like are easy to occur, and meanwhile, production accidents such as steel leakage and the like are easy to occur under the condition of high drawing speed, and the high drawing speed of the hypo-peritectic steel plate blank is one of the problems of stable production of a plate blank continuous casting machine;
the article research entitled "improving the influence of the pulling speed of the hypo-peritectic steel slab on the heat transfer of a crystallizer" shows that when the pulling speed is improved from 1.3m/min to 1.5m/min, the average heat flow is increased by about 0.1MW/m2, and the local heat flow in a wide-side meniscus area is increased by 0.13MW/m2The left and the right are both in a reasonable range; but the average heat flow ratio of the narrow surface/the wide surface of the crystallizer exceeds 0.9, the taper of the crystallizer is properly reduced, the thickness of the wide surface blank shell is reduced by about 4mm on average, and the heat transfer strength of the crystallizer is strictly controlled to ensure the stability of the continuous casting process and the quality of a casting blank. The paper shows that when the drawing speed of the hypo-peritectic steel slab reaches 1.5m/min, the casting risk and quality risk are not practically applied due to insufficient thickness of a solidified slab shell and overlarge heat flow ratio of the narrow surface/the wide surface of a crystallizer, so that the technology belongs to the blank field for the field.
Disclosure of Invention
The invention aims to provide a high-pulling-speed production method of a sub-peritectic steel plate blank, which can realize stable production when the high-pulling speed of the sub-peritectic steel plate blank is 1.6m/min, and the quality of a casting blank meets the production requirement; meanwhile, the method promotes the stable control of the quality of the casting blank and the cost reduction and efficiency improvement so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-pulling-speed production method of a sub-peritectic steel slab comprises the following steps:
s1: conveying the chemical components of the sub-peritectic steel and the liquid molten steel with qualified temperature to a slab for continuous casting by using a ladle;
s2: molten steel enters a tundish;
s3: molten steel enters a crystallizer with cooling and vibrating periphery;
s4: the casting flow with the liquid core enters a fan-shaped section of a slab caster at a certain speed, and is cooled while running;
s5: the solid casting blank with a certain shape is completely solidified at the tail section of the slab caster.
Furthermore, the chemical components of the hypo-peritectic steel in S1 are as follows by weight percentage: c: 0.10-0.12%, Si: 0.20 to 0.40 percent of,Mn：1.10-1.30％，P≤0.020，S≤0.015％，Als: 0.030 to 0.050%, Nb + Ti: 0.030-0.050%; the section specification of the continuous casting billet is as follows: 230 x (950-2。
Further, the degree of superheat of the tundish in S2 was 15 to 25 ℃.
Furthermore, the cooling water amount of the crystallizer in S3 is 4050-.
Further, the inverse conicity value of the crystallizer is 1-1.2%.
Furthermore, the vibration frequency and the vibration range of the crystallizer are reversely changed along with the pulling speed, the vibration range (S) is 2+4 x the pulling speed (v), and the frequency (f) is 160-10 x the pulling speed (v).
Furthermore, the crystallizer protection slag comprises the following chemical components in percentage by weight: SiO 22：28-34％，MgO：0.5-1.0％，CaO：38-42％，Al2O3：3.0-3.7％，R2O：8.5-9.5％，F-：10.5-12％，H2O is less than or equal to 0.5 percent, C: 4 to 5 percent; wherein the alkalinity R corresponds to CaO/SiO21.29 plus or minus 0.02 percent; the melting point is 1110-1150 ℃.
Furthermore, the narrow-face foot roller device of the crystallizer is arranged as follows:
a) each pair of foot rollers are set to be different in width according to different thicknesses and strengths of blank shells, and the width of each foot roller is set as follows: the narrow side dimension of the slab is W, and the width W of the first pair of foot rolls1W/2 +/-5 mm, and the width W of the second pair of foot rollers2＝W1+20mm, third pair of foot rolls W3＝W2+20mm；
b) The distance between the central lines of the first pair of foot rollers and the lower opening of the narrow copper plate is L1-W1, L2-L3-W2 + W3)/2;
c) the first pair of foot rollers and the second pair of foot rollers are rigidly supported, the third pair of foot rollers are elastically supported foot rollers, a disc spring is used as a support, and the magnitude of the support force is set according to the hydrostatic pressure of molten steel and the strength of a blank shell.
Further, the secondary cooling ratio water amount in S4 is: 0.61 plus or minus 0.05L/Kg; the casting speed is 1.0-1.6 m/min.
Further, the board in S5The billet continuous casting machine adopts a dynamic soft reduction process: the total pressure is 3.5-6.0 mm; the reduction interval is the solid phase fraction fS30% -70%; wherein the reduction amount is 0.6-0.8mm at the temperature range of 50-70 ℃ below the solidus temperature; the reduction rate is 0.7-1.2 mm/m.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a high-pulling-speed production method of a sub-peritectic steel plate blank, which sequentially comprises the steps of conveying liquid molten steel with qualified chemical components and temperature to a plate blank for continuous casting → the molten steel enters a tundish → the molten steel enters a crystallizer with cooling and vibration on the periphery → a casting flow with a liquid core enters a fan-shaped section at a certain speed, and runs while cooling → is completely solidified into a solid casting blank with a certain shape; the production method can realize stable production of the sub-peritectic steel plate blank when the high drawing speed is 1.6m/min, no steel leakage accident occurs, the surface of the casting blank has no longitudinal crack and dent defect, the center segregation of the casting blank is stably controlled to be B0.5-C1.5, the surface quality and the performance of the hot rolled coil are good, and the production requirement of the casting blank quality is met.
2. The high-pulling-speed production method of the sub-peritectic steel plate blank optimizes the rhythm matching of smelting, continuous casting, heating and rolling production and releases the capacity of a casting machine; meanwhile, the stable control of the quality of the casting blank and the cost reduction and efficiency improvement are promoted.
Drawings
FIG. 1 is a schematic view of a slab casting process of the present invention;
FIG. 2 is a graph of the variation of the frequency with the pull rate;
FIG. 3 is a graph showing the variation of negative slip time under different pull rates in accordance with the present invention;
FIG. 4 is a diagram of a foot roller device for narrow side of crystallizer according to the present invention;
FIG. 5 is a schematic diagram of the mushy zone of the solid-liquid two-phase zone of the present invention;
FIG. 6 is a diagram of a foot roller device with narrow side of a crystallizer for high pulling speed of 230mm thick hypo-peritectic steel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Referring to fig. 1, in the embodiment of the present invention: the high-pulling-speed production method of the sub-peritectic steel slab comprises the following steps:
the first step is as follows: conveying the chemical components of the sub-peritectic steel and the liquid molten steel with qualified temperature to a slab for continuous casting by using a ladle;
the second step is that: molten steel enters a tundish;
the third step: molten steel enters a crystallizer with cooling and vibrating periphery;
the fourth step: the casting flow with the liquid core enters a fan-shaped section of a slab caster at a certain speed, and is cooled while running;
the fifth step: the solid casting blank with a certain shape is completely solidified at the tail section of the slab caster.
In the first step, the hypo-peritectic steel comprises the following chemical components in percentage by weight: c: 0.10-0.12%, Si: 0.20-0.40%, Mn: 1.10-1.30%, P is less than or equal to 0.020%, S is less than or equal to 0.015%, and Als: 0.030 to 0.050%, Nb + Ti: 0.030-0.050%, see table 1 below; the section specification of the continuous casting billet is as follows: 230 x (950-2。
TABLE 1 typical chemical composition (%)
In the second step, the superheat degree of the tundish is 15-25 ℃.
In the third step, the cooling water amount of the crystallizer on the wide surface is 4050-; the inverse conicity value of the crystallizer is 1-1.2%.
In the third step, the vibration frequency and the vibration range of the crystallizer are set to be changed reversely with the pulling speed, the vibration range (S) is 2+4 x the pulling speed (v), and the frequency (f) is 160-10 x the pulling speed (v); as shown in fig. 2, the forward slipping time is increased, the consumption of the mold flux is increased, the lubrication is improved, and the sticking and the breakout are prevented; meanwhile, the negative slip time is kept stable and unchanged at 0.15 second, as shown in figure 3, the molten crystallizer casting powder can be ensured to uniformly flow into a gap between a solidified shell and a copper plate, so that the solidified shell in the crystallizer can be uniformly cooled, the occurrence probability of surface cracks of a casting blank is reduced, and the surface quality of the casting blank is improved.
In the third step, the crystallizer casting powder comprises the following chemical components in percentage by weight: SiO 22：28-34％，MgO：0.5-1.0％，CaO：38-42％，Al2O3：3.0-3.7％，R2O：8.5-9.5％，F-：10.5-12％，H2O is less than or equal to 0.5 percent, C: 4-5%, as shown in table 2; wherein the alkalinity R corresponds to CaO/SiO21.29 plus or minus 0.02 percent; the melting point is 1110-1150 ℃.
TABLE 2 chemical composition of crystallizer casting slag for hypo-peritectic steel
Wherein, the alkalinity R value of the crystallizer casting powder is too large, the proportion of the crystalline phase in the solid slag film is too high, the lubricating function is affected, and steel leakage accidents are easy to occur; if the R value is too small, the proportion of crystalline phases in the solid slag film is too small, the heat transfer control function is reduced, and the casting blank has crack defects.
In step three, the foot roller device on the narrow side of the crystallizer is arranged as follows, please refer to fig. 4:
a) each pair of foot rollers are set to be different in width according to different thicknesses and strengths of blank shells, and the width of each foot roller is set as follows: the narrow side dimension of the slab is W, and the width W of the first pair of foot rolls1W/2 +/-5 mm, and the width W of the second pair of foot rollers2＝W1+20mm, third pair of foot rolls W3＝W2+20mm；
b) The distance between the central lines of the first pair of foot rollers and the lower opening of the narrow copper plate is L1-W1, L2-L3-W2 + W3)/2;
c) the first pair of foot rollers and the second pair of foot rollers are rigidly supported, the third pair of foot rollers are elastically supported foot rollers, the disc springs are used as supports, the magnitude of the supporting force is set according to the hydrostatic pressure of molten steel and the strength of a blank shell, the disc springs can retract to play a role in protection after overload occurs, and the foot rollers are prevented from being damaged.
Through the arrangement, the narrow-surface billet shell of the slab can be effectively supported through the change of the widths of the foot rolls at different positions under the condition of high drawing speed, and the bulging of the narrow surface of the casting billet is reduced; when overload occurs, the elastic foot roller can retract, so that a protection effect is achieved, and the whole foot roller device is prevented from being pulled off; the reasonable arrangement provides different supporting conditions at different positions, and the service life of the foot roller is prolonged.
In the fourth step, the second cooling ratio water quantity is as follows: 0.61 plus or minus 0.05L/Kg; the pouring speed is 1.0-1.6 m/min; the secondary cooling ratio water quantity is too large, the casting blank is easy to generate longitudinal crack defects, the casting blank is too small, the casting blank is not cooled sufficiently, internal segregation caused by bulging of the casting blank is easy to occur, and the casting blank stagnation accident occurs in serious cases; the casting speed is too low, the production efficiency of the casting machine is reduced, the casting speed is too high, the consumption of the crystallizer casting powder is insufficient, and the breakout accident is caused.
In the fifth step, the slab caster adopts a dynamic soft reduction process: the total pressure is 3.5-6.0 mm; the reduction interval is the solid phase fraction fS30% -70%; wherein the reduction amount is 0.6-0.8mm at the temperature range of 50-70 ℃ below the solidus temperature; the reduction rate is 0.7-1.2mm/m, as shown in FIG. 5:
the total reduction is too large, the external force borne by the casting blank is too large, so that middle cracks are easily generated in the casting blank, and the casting blank cannot move in serious cases; and if the temperature is too low, the natural shrinkage caused by temperature reduction cannot be compensated, the enriched molten steel cannot be compressed and flowed, and the center segregation quality of the casting blank is reduced.
The production method can realize the stable production of the sub-peritectic steel plate blank at the drawing speed of 1.6m/min, no steel leakage accident, no longitudinal crack and depression defect on the surface of the casting blank, stable control of the center segregation of the casting blank at B0.5-C1.5, and good surface quality and performance of a hot-rolled coil.
In order to further illustrate the invention, the following specific examples are also provided:
the first embodiment is as follows:
the production specification is 230mm x 1300mm, the chemical composition of the middle package is shown in table 3, the crystallizer is equipped with a narrow-face foot roller device shown in fig. 6:
TABLE 3 typical chemical composition of hypo-peritectic steels (%)
In the embodiment, the water amount of the cooling wide surface of the crystallizer is 4500L/min, and the water amount of the cooling narrow surface of the crystallizer is 490L/min; the inverse conicity value of the crystallizer is 1.1 percent; the superheat degree of the tundish is 20 ℃; the crystallizer vibration mode adopts a reverse vibration mode that the vibration frequency and the amplitude are reversely changed along with the pulling speed, and the negative slip time is 0.15 second; the secondary cooling water ratio is as follows: 0.63L/Kg; the pouring speed is 1.6 m/min; alkalinity R (CaO/SiO) of crystallizer covering slag2) Is 1.29; the melting point is 1110 ℃; the slab caster adopts a dynamic soft reduction process: the total reduction is 4.5 mm; wherein the reduction amount is 0.6mm at a temperature range of 50-70 deg.C below solidus temperature, and the reduction range is solid fraction (f)S) 30% -70%; the reduction rate was 1.1 mm/m.
The subcontracting steel plate blank is stably produced at the drawing speed of 1.6m/min, no steel leakage accident occurs, the surface of the casting blank has no longitudinal crack and dent defect, the center segregation of the casting blank is stably controlled at B0.5, and the surface quality and the performance of a hot-rolled coil are good.
Example two:
the production specification is 230mm x 1600mm, the chemical composition of the middle package is shown in table 4, and the crystallizer is equipped with a narrow-face foot roller device shown in fig. 6.
TABLE 4 typical chemical composition of hypo-peritectic steels (%)
In this embodiment, the amount of water in the wide cooling surface of the crystallizer is 4400L/min, and the amount of water in the narrow cooling surface is 500L/min; the inverse conicity value of the crystallizer is 1.1 percent; the superheat degree of the tundish is 15 ℃; the crystallizer vibration mode adopts a reverse vibration mode that the vibration frequency and the amplitude are reversely changed along with the pulling speed, and the negative slip time is 0.15 second; IIThe cold specific water quantity is as follows: 0.65L/Kg; the pouring speed is 1.5 m/min; alkalinity R (CaO/SiO) of crystallizer covering slag2) Is 1.30; the melting point is 1150 ℃; the slab caster adopts a dynamic soft reduction process: the total reduction is 4.0 mm; wherein the reduction amount is 0.8mm at a temperature range of 50-70 deg.C below solidus temperature, and the reduction range is solid fraction (f)S) 30% -70%; the reduction rate was 1.0 mm/m.
The subcontracting steel plate blank is stably produced at the drawing speed of 1.5m/min, no steel leakage accident occurs, the surface of the casting blank has no longitudinal crack and dent defect, the center segregation of the casting blank is stably controlled at C1.5, and the surface quality and the performance of a hot-rolled coil are good.
In summary, the following steps: the high-pulling-speed production method of the sub-peritectic steel plate blank provided by the invention can realize stable production when the high-pulling speed of the sub-peritectic steel plate blank is 1.6m/min, the quality of the casting blank meets the production requirement, and in addition, the rhythm matching of smelting, continuous casting, heating and rolling production is optimized, and the capacity of a casting machine is released; meanwhile, the stable control of the casting blank quality and the cost reduction and efficiency improvement are promoted.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. A high-pulling-speed production method of a sub-peritectic steel slab is characterized by comprising the following steps:
s1: conveying the chemical components of the sub-peritectic steel and the liquid molten steel with qualified temperature to a slab for continuous casting by using a ladle;
s2: molten steel enters a tundish;
s3: molten steel enters a crystallizer with cooling and vibrating periphery;
s4: the casting flow with the liquid core enters a fan-shaped section of a slab caster at a certain speed, and is cooled while running;
s5: the solid casting blank with a certain shape is completely solidified at the tail section of the slab caster.
2. The high-pulling-speed production method of the sub-peritectic steel slab as claimed in claim 1, wherein the chemical components of the sub-peritectic steel in S1 are as follows by weight percent: c: 0.10-0.12%, Si: 0.20-0.40%, Mn: 1.10-1.30%, P is less than or equal to 0.020%, S is less than or equal to 0.015%, and Als: 0.030 to 0.050%, Nb + Ti: 0.030-0.050%; the section specification of the continuous casting billet is as follows: 230 x (950-2。
3. The high-pulling-rate production method of the sub-peritectic steel slab as claimed in claim 1, wherein the superheat degree of the tundish in S2 is 15-25 ℃.
4. The method as claimed in claim 1, wherein the cooling water flow rate of the crystallizer in S3 is 4050-.
5. The high-pulling-speed production method of the sub-peritectic steel slab as claimed in claim 4, wherein the inverted conicity value of the crystallizer is 1% -1.2%.
6. The method for producing the hypo-peritectic steel slab at the high pulling speed according to claim 5, wherein the vibration mode of the crystallizer is that the vibration frequency and the vibration range are inversely changed with the pulling speed, the vibration range (S) is 2+4 x the pulling speed (v), and the frequency (f) is 160-10 x the pulling speed (v).
7. The high-pulling-speed production method of the sub-peritectic steel slab as claimed in claim 6, wherein the crystallizer casting powder comprises the following chemical components in percentage by weight: SiO 22：28-34％，MgO：0.5-1.0％，CaO：38-42％，Al2O3：3.0-3.7％，R2O：8.5-9.5％，F-：10.5-12％，H2O is less than or equal to 0.5 percent, C: 4 to 5 percent; wherein the alkalinity R corresponds to CaO/SiO21.29 plus or minus 0.02 percent; the melting point is 1110-1150 ℃.
8. The high-pulling-speed production method of the sub-peritectic steel slab as claimed in claim 7, wherein the arrangement mode of the narrow-face foot roller device of the crystallizer is as follows:
a) each pair of foot rollers are set to be different in width according to different thicknesses and strengths of blank shells, and the width of each foot roller is set as follows: the narrow side dimension of the slab is W, and the width W of the first pair of foot rolls1W/2 +/-5 mm, and the width W of the second pair of foot rollers2＝W1+20mm, third pair of foot rolls W3＝W2+20mm；
b) The distance between the central lines of the first pair of foot rollers and the lower opening of the narrow copper plate is L1-W1, L2-L3-W2 + W3)/2;
c) the first pair of foot rollers and the second pair of foot rollers are rigidly supported, the third pair of foot rollers are elastically supported foot rollers, a disc spring is used as a support, and the magnitude of the support force is set according to the hydrostatic pressure of molten steel and the strength of a blank shell.
9. The high-pulling-speed production method of the sub-peritectic steel slab as claimed in claim 1, wherein the secondary cooling ratio water amount in S4 is as follows: 0.61 plus or minus 0.05L/Kg; the casting speed is 1.0-1.6 m/min.
10. The high-pulling-speed production method of the sub-peritectic steel slab as claimed in claim 1, wherein the slab caster in S5 adopts a dynamic soft reduction process: the total pressure is 3.5-6.0 mm; the reduction interval is the solid phase fraction fS30% -70%; wherein the reduction amount is 0.6-0.8mm at the temperature range of 50-70 ℃ below the solidus temperature; the reduction rate is 0.7-1.2 mm/m.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113351842A (en) * | 2021-05-19 | 2021-09-07 | 天津荣程联合钢铁集团有限公司 | Efficient and stable continuous casting production process for large-section plate blank |
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| CN114734010B (en) * | 2022-03-18 | 2024-05-10 | 首钢京唐钢铁联合有限责任公司 | Production method of thin slab continuous casting and rolling online thinned casting blank |
| CN115415489A (en) * | 2022-09-05 | 2022-12-02 | 东北大学 | Aluminum/aluminum alloy thin slab continuous casting equipment and process |
| CN115415489B (en) * | 2022-09-05 | 2024-02-13 | 东北大学 | Continuous casting equipment and process for aluminum/aluminum alloy sheet billet |
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