A method for producing continuous casting billets of low-carbon high-aluminum wear-resistant steel with a strength greater than 1000MPa

Abstract

The present invention discloses a method for producing a low-carbon high-aluminum wear-resistant steel continuous casting billet greater than 1000MPa, and belongs to the field of metallurgical technology. The production method comprises the following steps: molten iron desulfurization step - converter double smelting step - LF refining + RH vacuum treatment step - slab continuous casting step. The converter double smelting step sequentially performs dephosphorization converter smelting and decarbonization converter smelting; the oxygen and nitrogen content of the molten steel in the tundish of the slab continuous casting step is T[O]≤18ppm, [N]≤50ppm, the superheat is 15-20°C, and a high-basicity carbon-free low-silicon covering agent and a special protective slag for low-carbon high-aluminum steel are used. The present invention can realize the production of low-carbon high-aluminum wear-resistant steel continuous casting billets with high cleanliness, high performance uniformity and high surface quality.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a pressure greater than 1000 MPa. Background Art

[0002] Steels with an aluminum (Al) content exceeding 0.5% are generally called high-aluminum steels. The addition of Al elements can expand the two-phase region of ferrite and austenite, increase the flexibility of the heat treatment process, and reduce the hydrogen embrittlement sensitivity and corrosion resistance of the steel, which helps to improve the stability and reproducibility of the performance of wear-resistant steels, and can achieve a good match of high strength and high toughness; at the same time, it can further reduce the weight of wear-resistant parts. Therefore, high-aluminum wear-resistant steels have gradually received widespread attention and development.

[0003] However, due to its own composition characteristics, high-aluminum steel has a strong slag-steel reaction during the production process, secondary oxidation nozzle floccules are prone to occur during the casting process, the protective slag is severely denatured, continuous casting is difficult, and the ingot is prone to defects such as depression and longitudinal cracks, and even steel leakage occurs. Therefore, this type of steel is still in the development stage. Many large steel companies have the production capacity to produce high-aluminum automotive dual-phase steel, but the efficiency of steelmaking and continuous casting is not high, and there are very few reports on the research of key technologies for steelmaking-continuous casting. In addition, high-aluminum wear-resistant steel is mainly bainite and martensite, and the composition system is completely different from high-aluminum automotive dual-phase steel. Its production experience has no reference significance for high-aluminum wear-resistant steel. Therefore, overcoming the production difficulties of high-aluminum wear-resistant steel is the top priority of the development of high-aluminum wear-resistant steel; it is very necessary to carry out research on key technologies for steelmaking-continuous casting of high-aluminum wear-resistant steel. At the same time, low-carbon steel must consider the influence of peritectic reaction, which makes the continuous casting and pouring of low-carbon high-aluminum wear-resistant steel more difficult. In the prior art, there is no method that can effectively solve the above technical problems of low-carbon high-aluminum wear-resistant steel. Summary of the invention

[0004] The purpose of the present invention is to provide a method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a pressure greater than 1000 MPa, so as to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] One of the technical solutions of the present invention is a method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a pressure greater than 1000 MPa, characterized in that it comprises the following steps:

[0007] (1) Hot metal desulfurization process: hot metal is desulfurized to a level where the [S] content is ≤ 0.009 wt %;

[0008] (2) a converter double smelting process: the molten iron after desulfurization treatment is subjected to dephosphorization converter smelting and decarburization converter smelting in sequence, wherein the components of the molten steel at the end of the decarburization converter smelting include [C]: 0.022-0.040wt%, [S]≤0.008wt%, [P]≤0.006wt%, and the end temperature is 1680-1700°C;

[0009] (3) LF refining (ladle refining) + RH vacuum treatment (molten steel vacuum cycle degassing) process: the composition of LF refining slag is controlled to be SiO2≤2wt%, MgO 8-10wt%, Al2O340wt%, and CaO50wt%; the composition of molten steel after RH vacuum treatment includes [C]: 0.13-0.15wt%, [Si]: 0.40-0.60wt%, [Als]: 0.50-0.60wt%, [Mn]: 1.30-1.50wt%, [Nb]: 0.01-0.03wt%, [Ti]: 0.01-0.03wt%, [S]≤0.003wt%, [P]≤0.008wt%, and [N]≤0.005wt%; wherein [Als] represents acid-soluble aluminum;

[0010] (4) Slab continuous casting process: The tundish molten steel uses a high-basicity carbon-free, low-silicon covering agent, wherein the composition of the high-basicity carbon-free, low-silicon covering agent is SiO2: 3.5-3.7wt%, CaO: 48.0-50.0wt%, MgO: 3.8-4.0wt%, Al2O3: 41.0-42.0wt%, MnO: 0.3-0.4wt%, TFe: 1.60-1.70wt% and the remainder of impurities; the protective slag uses a special protective slag for low-carbon high-aluminum steel, wherein the special protective slag for low-carbon high-aluminum steel is 1.60-1.70wt%. The protective slag has the following components: SiO2: 35.0-41.0wt%, CaO: 21.0-27.0wt%, MgO: 1.0-1.5wt%, Al2O3: 1.4-3.4wt%, Na2O: 9.0-11.5wt%, F: 10-12.0wt%, MnO2: 2.0-4.0wt% and the remaining impurities; the oxygen and nitrogen content of the tundish steel water is T[O]≤18ppm, [N]≤50ppm (mass content), and the superheat is 15-20°C. T[O] represents the total oxygen content, and TFe represents the total iron content; the contents of the various components in the high-basicity carbon-free low-silicon covering agent and the protective slag for low-carbon high-aluminum steel are all the pure substance contents of the various components.

[0011] The high basicity carbon-free and low-silicon covering agent of the present invention does not contain carbon and has a low SiO2 content, thereby preventing C and Si elements from being introduced into molten steel to affect the original components.

[0012] The protective slag component system for low carbon high aluminum steel of the present invention adopts the CaO-SiO2 system. The MnO2 and MgO added to the protective slag can improve the fluidity of the protective slag. The MnO2 added to the protective slag can also protect SiO2 from being reduced, weaken the reactivity and reduce the initial viscosity. The protective slag of the present invention has a high basicity and a good ability to control heat transfer, and can avoid the occurrence of peritectic reaction during continuous casting.

[0013] Furthermore, the molten iron is pre-slaged before the desulfurization treatment so that the exposed surface of the molten iron is ≥18%, and after the desulfurization treatment, the slag on the surface of the molten iron is scraped off so that the exposed surface of the molten iron is ≥88%.

[0014] Furthermore, the desulfurization treatment of the molten iron is specifically to use a desulfurizer to desulfurize the molten iron, and the composition of the desulfurizer is 90wt% lime, 5wt% fluorite, and the remainder is impurities.

[0015] Furthermore, the oxygen supply in the dephosphorization converter smelting stage is 20-30% of the total oxygen supply in the converter double smelting process; the basicity in the dephosphorization converter smelting stage is controlled to be 2.2-2.4, the pouring temperature is 1420-1460°C, and the slag pouring amount is 30-65%.

[0016] Furthermore, in the converter double smelting process, a front and rear double-block process is adopted when tapping steel from the converter, the front block adopts a slag blocking plug, and the rear block adopts a slide plate and a slag blocking mark combined with slag blocking, and the slag thickness is ≤18mm; alloy and slag-making materials are added when 1 / 5 of the molten steel is tapped, and the order of adding materials is lime→steel grit aluminum→ferrosilicon→high carbon ferromanganese→high carbon ferrochrome, and the alloy and slag-making materials are added before 4 / 5 of the steel is tapped, and the tapping time is ≥3min.

[0017] Furthermore, the specific operation of the RH vacuum treatment is: at 80-100 Nm 3 After 5 minutes of vacuum circulation with an increase in gas flow rate of / h, the molten steel composition is adjusted with titanium and the final alloy composition, and then the pure degassing time is maintained at ≥ 8 minutes.

[0018] Furthermore, the melting point of the special protective slag for low-carbon high-aluminum steel is 950-960° C., and the viscosity is 1.50-1.55 poise.

[0019] Furthermore, the water distribution of the crystallizer in the slab continuous casting process adopts a slow cooling mode, with a wide surface water volume of 3500-3600L / min and a narrow surface flow rate of 480-500L / min; a long water inlet and argon gas seal are used from the ladle to the tundish to protect the molten steel, and the crystallizer liquid level fluctuation is controlled to be ≤±3mm; after the continuous casting billet is off the line, the surface is cleaned by flame cleaning or slab grinding machine, with a depth of 2-3mm.

[0020] Furthermore, after the continuous casting billet is off the production line, the continuous casting billet is also subjected to hot rolling and pickling treatment, and finally a low-carbon high-aluminum wear-resistant steel product with uniform performance and high surface quality is obtained after pickling.

[0021] The present invention discloses the following technical effects:

[0022] The present invention significantly improves the cleanliness of molten steel through reasonable component design and fine control of the entire process of converter, LF, RH and continuous casting. Combined with flame cleaning or ingot grinding, low-carbon high-aluminum wear-resistant steel continuous casting ingots that meet the requirements of subsequent processing and use are produced, thereby achieving the production of continuous casting ingots with high cleanliness, uniform structure and high surface quality.

[0023] The present invention develops a special protective slag for low-carbon high-aluminum steel, and the continuous casting process is stable; the composition of low-carbon high-aluminum wear-resistant steel and the refined slag system are optimized to ensure the cleanliness control of molten steel. During continuous casting, the total oxygen of molten steel in the tundish can be controlled within 18ppm, and the inclusions are controlled within 20μm; through the production control of the whole process, the problem of continuous casting of low-carbon high-aluminum wear-resistant steel is solved, and currently 15 furnaces of continuous casting can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is the surface quality diagram of the 15th furnace of continuous casting slab produced in Example 1. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0027] It should be understood that the terms described in the present invention are only for describing a particular embodiment and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. The intermediate value in any stated value or stated range, and each smaller range between any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0028] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0029] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary only.

[0030] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0031] The present invention provides a method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a strength of more than 1000 MPa, comprising the following steps: a molten iron desulfurization step - a converter dual smelting step - a LF refining + RH vacuum treatment step - a slab continuous casting step. The present invention has no special restrictions on the processing capacity of each step and the specifications of the continuous casting billet.

[0032] The component contents involved in the present invention all refer to mass contents, and the "%" involved all represent mass percentage.

[0033] In order to further illustrate the production method of the continuous casting billet of low-carbon high-aluminum wear-resistant steel with a capacity greater than 1000MPa of the present invention, by changing the main parameters of each process within the scope defined by the claims, specific embodiments 1-10 are formed to conduct a detailed exploration of the process and corresponding results.

[0034] Examples 1-10

[0035] A method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a pressure greater than 1000 MPa, comprising the following steps:

[0036] (1) Hot metal desulfurization process: Before desulfurization, pre-slag is removed to make the exposed surface of the hot metal ≥18%. The hot metal is desulfurized using a desulfurizer (90% lime + 5% fluorite + residual impurities). After desulfurization, the slag on the surface of the hot metal is removed to make the exposed surface of the hot metal ≥88%. The [S] content of the hot metal entering the converter is ensured to be ≤0.009%. The specific process parameter control of each embodiment is shown in Table 1.

[0037] (2) Dual converter smelting process: dephosphorization converter smelting and decarburization converter smelting processes are adopted, and the components and mass percentages in the molten steel at the end of smelting include [C]: 0.022-0.040%, [S]≤0.008%, [P]≤0.006%, and the end temperature is 1680-1700°C; the converter tapping adopts a front and rear double-block process, the front block adopts a slag blocking plug, and the rear block adopts a slide plate and a slag blocking mark to block the slag, and the lower slag thickness is ≤18mm; when 1 / 5 of the molten steel is tapped, the material is added (alloy and slag-making material are added according to the refined slag system composition to be achieved in the LF refining + RH vacuum treatment process and the component composition of the molten steel when it leaves the station), and the order of adding materials is lime→steel grit aluminum→ferrosilicon→high carbon ferromanganese→high carbon ferrochrome, and the alloy and slag-making material are added before 4 / 5 of the steel is tapped, and the tapping time is ≥3min. The specific process parameter control of each embodiment is shown in Table 1.

[0038] Among them, the oxygen supply in the dephosphorization converter smelting stage is the total oxygen supply of the dephosphorization converter smelting and the decarbonization converter smelting (28000m 3 / h) of 20-30%, lime is added in the dephosphorization converter smelting stage to control the basicity to 2.2-2.4, the pouring temperature is 1420-1460°C, and the slag pouring amount is 30-65%. The specific process parameters of the dephosphorization converter smelting stage of each embodiment are shown in Table 2.

[0039] Table 1 Parameters of hot metal desulfurization process and converter dual smelting process in various embodiments

[0040]

[0041]

[0042] Table 2 Process parameters of dephosphorization converter smelting stage in each embodiment

[0043] Example Oxygen supply / % Alkalinity Furnace pouring temperature / ℃ Slag discharge amount / % 1 22 2.3 1422 62 2 23 2.2 1432 63 3 28 2.2 1455 65 4 30 2.4 1460 58 5 22 2.3 1420 56 6 23 2.3 1458 30 7 20 2.4 1460 42 8 25 2.3 1428 45 9 27 2.2 1436 38 10 29 2.3 1438 49

[0044] (3) LF refining + RH vacuum treatment process: the main components of the refined slag are controlled within the range of SiO2 about 2%, MgO about 8%, Al2O3 about 40%, and CaO about 50%; the composition and mass percentage of the molten steel when leaving the RH station are [C]: 0.13-0.15%, [Si]: 0.40-0.60%, [Als]: 0.50-0.60%, [Mn]: 1.30-1.50%, [Nb]: 0.01-0.03%, [Ti]: 0.01-0.03%, [S] ≤ 0.003%, [P] ≤ 0.008%, [N] ≤ 0.005% and the balance iron; the RH lifting gas flow rate is 80-100 Nm 3 / h; after 5 minutes of vacuum circulation, the molten steel composition is adjusted with titanium, niobium and the final alloy composition, and then the pure degassing time is maintained for ≥ 8 minutes. The specific parameter control of the LF refining + RH vacuum treatment process in each embodiment is shown in Table 3.

[0045] Table 3 LF refining + RH vacuum treatment process parameter control of each embodiment

[0046]

[0047] (4) Slab continuous casting process: The tundish molten steel uses a high-basicity carbon-free and low-silicon covering agent, and the covering agent has the following components: SiO2: 3.5-3.7%, CaO: 48.0-50.0%, MgO: 3.8-4.0%, Al2O3: 41.0-42.0%, MnO: 0.3-0.4%, TFe: 1.60-1.70% and the remainder of impurities; the protective slag uses a special protective slag for low-carbon and high-aluminum steel, and the components and weight ratio of the special protective slag are SiO2: 35.0-41.0%, CaO: 21.0-27.0%, MgO: 1.0-1.5%, Al2O3: 1.4-3.4%, Na2O: 9.0-11.5%, F: 10-12.0%, MnO2: 2.0-4.0% and the remainder of impurities. The melting point of the protective slag for low carbon high aluminum steel is 950-960°C, and the viscosity is 1.50-1.55 poise; the mass number of oxygen and nitrogen content in the tundish molten steel is controlled to be T[O]≤18ppm, [N]≤50ppm, and the superheat is controlled at 15-20°C. The composition of the tundish covering agent and the composition of the molten steel in the slab continuous casting process of each embodiment are shown in Table 4. The composition, weight content and viscosity index of the protective slag in the slab continuous casting process of each embodiment are shown in Table 5.

[0048] Table 4 Composition of tundish covering agent and molten steel in slab continuous casting process of each embodiment

[0049]

[0050] Table 5 Composition, weight content and viscosity index of mold slag in slab continuous casting process of each embodiment

[0051]

[0052]

[0053] Moreover, in the slab continuous casting process, the water distribution of the crystallizer adopts the slow cooling mode, the water volume of the wide surface is 3500-3600L / min, and the narrow surface flow rate is 480-500L / min; the long water inlet from the ladle to the tundish is sealed with argon to protect the molten steel, and the crystallizer liquid level fluctuation is controlled to be ≤±3mm; after the continuous casting billet is off the line, the surface is cleaned by a slab grinding machine, with a depth of 2-3mm. The process parameters of the continuous casting process of each embodiment are shown in Table 6.

[0054] Table 6 Process parameters of continuous casting process in various embodiments

[0055]

[0056] The surface quality of the 15th furnace continuous casting billet produced in Example 1 (before the surface cleaning is performed off the line) is shown in the figure below: Figure 1 As shown, the surface quality of the 15th furnace continuous casting billet (before surface cleaning) produced by Example 2-9 is basically the same as that of Example 1. The continuous casting billets produced by Example 1-10 according to the above process have no surface defects such as longitudinal cracks and depressions after cold inspection, which can well meet the requirements of subsequent hot rolling process.

[0057] The inclusions of the slabs of the 15th continuous casting furnace of Example 1 were fully scanned and analyzed. The results showed that the inclusions were mainly fine Al2O3, and the rest were sulfides, aluminosilicates and a small amount of TiN. The scanning area was 20.5mm 2 The total number of inclusions is 115, the size of the inclusions is mainly concentrated below 5 μm, the maximum size of the inclusions is 20 μm, and the total number and size of the inclusions are significantly lower than the control level of other steel grades. The surface quality of the 15th furnace continuous casting billet produced in Example 2-10 is basically the same as that in Example 1.

[0058] The continuous casting slab produced in the 15th furnace of Example 1-10 after being off the line and surface cleaned by the slab grinding machine was sampled, water quenched and tempered, and the mechanical properties of the final product were tested. The results are shown in Table 7:

[0059] Table 7 Mechanical properties of wear-resistant steel products obtained in Examples 1-10

[0060]

[0061] Comparative Examples 1-3

[0062] The same as Example 1, the only difference is that the composition of the protective slag is different from that of Example 1. The protective slag components, weight contents and viscosity indicators of Comparative Examples 1-3 are shown in Table 8. After pouring, the nozzle is severely bonded and there are turbulent objects, which cannot meet the requirements of multi-furnace continuous pouring.

[0063] Table 8 Composition, weight content and viscosity index of mold slag in slab continuous casting process of each comparative example

[0064]

[0065] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a strength greater than 1000 MPa, characterized in that: Including the following processes: (1) Hot metal desulfurization process: hot metal is desulfurized to a level where the [S] content is ≤ 0.009 wt%; (2) a converter double smelting process: the molten iron after desulfurization treatment is subjected to dephosphorization converter smelting and decarburization converter smelting in sequence, wherein the components of the molten steel at the end of the decarburization converter smelting include [C]: 0.022-0.040wt%, [S]≤0.008wt%, [P]≤0.006wt%, and the end temperature is 1680-1700°C; (3) LF refining + RH vacuum treatment process: the composition of LF refining slag is controlled to be SiO2≤2wt%, MgO 8-10wt%, Al2O3 40wt%, CaO 50wt%; the composition of molten steel after RH vacuum treatment includes [C]: 0.13-0.15wt%, [Si]: 0.40-0.60wt%, [Als]: 0.50-0.60wt%, [Mn]: 1.30-1.50wt%, [Nb]: 0.01-0.03wt%, [Ti]: 0.01-0.03wt%, [S]≤0.003wt%, [P]≤0.008wt%, [N]≤0.005wt%; (4) Slab continuous casting process: The tundish molten steel uses a high-basicity carbon-free, low-silicon covering agent, wherein the composition of the high-basicity carbon-free, low-silicon covering agent is SiO2: 3.5-3.7wt%, CaO: 48.0-50.0wt%, MgO: 3.8-4.0wt%, Al2O3: 41.0-42.0wt%, MnO: 0.3-0.4wt%, TFe: 1.60-1.70wt% and the remainder of impurities; the protective slag uses a special protective slag for low-carbon high-aluminum steel, wherein the low-carbon high-aluminum The components of the special protective slag for steel are SiO2: 35.0-41.0wt%, CaO: 21.0-27.0wt%, MgO: 1.0-1.5wt%, Al2O3: 1.4-3.4wt%, Na2O: 9.0-11.5wt%, F: 10-12.0wt%, MnO2: 2.0-4.0wt% and the remainder of impurities; the oxygen and nitrogen contents of the molten steel in the tundish are T[O]≤18ppm, [N]≤50ppm, and the superheat is 15-20°C; The oxygen supply in the dephosphorization converter smelting stage is 20-30% of the total oxygen supply in the converter double smelting process; the basicity in the dephosphorization converter smelting stage is controlled to be 2.2-2.4, the pouring temperature is 1420-1460°C, and the slag pouring amount is 30-65%; The converter duplex smelting process adopts a front and rear double-blocking process when tapping steel from the converter, wherein the front block adopts a slag blocking plug, and the rear block adopts a slide plate and a slag blocking mark to block the slag, and the slag thickness is ≤18mm; alloy and slag-making materials are added when 1 / 5 of the molten steel is tapped, and the order of adding materials is lime→steel grit aluminum→ferrosilicon→high carbon ferromanganese→high carbon ferrochrome, and alloy and slag-making materials are added before 4 / 5 of the molten steel is tapped, and the tapping time is ≥3min; The specific operation of the RH vacuum treatment is: 3 After 5 minutes of vacuum circulation with a gas flow rate of / h, the molten steel composition is adjusted with titanium and the final alloy composition, and then the pure degassing time is maintained for ≥8 minutes; The water distribution of the crystallizer in the slab continuous casting process adopts a slow cooling mode, with a wide surface water volume of 3500-3600L / min and a narrow surface flow rate of 480-500L / min; a long water inlet and argon gas seal are used from the ladle to the tundish to protect the molten steel, and the crystallizer liquid level fluctuation is controlled to be ≤±3mm; after the continuous casting billet is off the line, it is surface cleaned by flame cleaning or slab grinding machine, with a depth of 2-3mm.

2. The method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a strength of more than 1000 MPa as claimed in claim 1, characterized in that: Before the desulfurization treatment, the molten iron is pre-slag-scraped to make the exposed surface of the molten iron ≥18%. After the desulfurization treatment, the slag on the surface of the molten iron is scraped clean to make the exposed surface of the molten iron ≥88%.

3. The method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a strength of more than 1000 MPa as claimed in claim 1, characterized in that: The special protective slag for low carbon high aluminum steel has a melting point of 950-960° C. and a viscosity of 1.50-1.55 poise.

4. The method for producing a continuous casting billet of low-carbon high-aluminum wear-resistant steel with a strength of more than 1000 MPa as claimed in claim 1, characterized in that: After the continuous casting billet comes off the production line, it also undergoes hot rolling and pickling treatments.

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