CN112609133B - Vanadium-nitrogen steel bar with good anti-seismic effect for building materials and production method thereof - Google Patents
Vanadium-nitrogen steel bar with good anti-seismic effect for building materials and production method thereof Download PDFInfo
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
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- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
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- E—FIXED CONSTRUCTIONS
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- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
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- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
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Abstract
The invention discloses a vanadium-nitrogen steel bar with good anti-seismic effect for building materials and a production method thereof, and particularly relates to the technical field of steel bar production. The steel bar is provided with a plurality of groups of height-measuring annular steel bodies, which are beneficial to mutual reference when workers insert a plurality of groups of steel bars at the same line surface during building construction, so that the heights of the steel bars of all groups are basically consistent, and the production and construction are convenient.
Description
Technical Field
The invention relates to the technical field of steel bar production, in particular to a vanadium-nitrogen steel bar with good anti-seismic effect for building materials and a production method thereof.
Background
The steel bar is steel for reinforced concrete and prestressed reinforced concrete, and the cross section of the steel bar is circular or square with round corners. The steel bars for reinforced concrete are straight bar or wire rod-shaped steel used for reinforcing the reinforced concrete, the shapes of the steel bars are smooth steel bars and deformed steel bars, and the delivery state is straight bar or wire rod. With the continuous development of city construction and social progress, buildings in all countries of the world are developed to be large-scale at present, and in order to improve the safety of large buildings, hot-rolled ribbed steel bars with good welding performance and high strength are generally adopted in foreign building industries, for example, steel bars with the grade of 500MPa or above are basically adopted in countries of European Union and North America. Compared with 335MPa and 400 MPa-grade steel bars, the 500MPa steel bar has the advantages of high strength, large safety reserve capacity, good anti-seismic performance, steel consumption saving, convenient construction and the like, is more suitable for high-rise, large-span and anti-seismic building structures, and is a novel building material with more saving and higher efficiency.
When the existing steel bars are used in building construction, workers cannot refer to each other when inserting a plurality of groups of steel bars at the same line surface position during building construction, so that the heights of the steel bars of all groups cannot be basically consistent, and the steel bars are inconvenient to produce and construct.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a vanadium-nitrogen steel bar for building materials with good anti-seismic effect and a production method thereof, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
according to one aspect of the invention, the vanadium-nitrogen steel bar for the building materials with good anti-seismic effect comprises a bar body, wherein a plurality of height-measuring annular steel bodies are welded on the bar body, and annular binding grooves are formed in the height-measuring annular steel bodies.
The vanadium-nitrogen steel bar with good anti-seismic effect for the building materials is prepared from the following raw materials in parts by mass:
20-30 parts of carbon, 200 parts of silicon 150, 180 parts of manganese 100, 5-8 parts of vanadium, 1-3 parts of nitrogen, 10-100 parts of chromium, 20-100 parts of molybdenum, 10-25 parts of phosphorus, 10-25 parts of sulfur, 0.01-0.02 part of oxygen and the balance of impurities of iron.
According to another aspect of the invention, the production method of the vanadium-nitrogen steel bar for the building materials with good anti-seismic effect is provided.
The production method of the vanadium-nitrogen steel bar with good anti-seismic effect for building materials comprises the following steps:
s1: preparing materials: preparing raw materials such as impurities of carbon, silicon, manganese, vanadium, nitrogen, chromium, molybdenum, phosphorus, sulfur, oxygen and iron in parts by mass;
s2: continuous casting and blank making: the raw materials are fused and made into molten steel through a steel making furnace, the molten steel is conveyed to a rotary table through a steel containing barrel, the molten steel is divided into a plurality of strands through a molten steel distributor, the strands are respectively injected into casting films with specific shapes, cooling, solidification and forming are started, casting blanks with outer solidified shells and inner molten steel are produced, then the casting blanks are drawn into arc-shaped casting channels, the casting blanks are continuously solidified to be completely solidified through secondary cooling, and then the casting blanks are cut into steel billets after being straightened;
s3: hot rolling of steel billets: feeding the billet into a heating furnace with the furnace temperature of 1100-1200 ℃ at the soaking section, heating for 60-120 minutes to ensure that the initial rolling temperature of the billet is 1050-1100 ℃, and carrying out rough rolling for 6 passes under the rolling condition of the speed of 0.8-1.3 m/s for 50-70 seconds; then, carrying out medium rolling for 6 passes under the rolling condition with the speed of 3.8-4.5 m/s for 60-80 seconds; finally, finish rolling for 2-6 passes under the rolling condition that the speed is 7.0-15.0 m/s, wherein the rolling time is 55-75 seconds in total, and the final rolling temperature is controlled to be 950-980 ℃;
s4: and (3) cooling: naturally cooling the finish rolled steel on a cooling bed to room temperature in an air cooling mode, and obtaining the vanadium-nitrogen reinforcing steel bar for the building material with good anti-seismic effect;
s5: cutting and forming: and cutting and polishing the reinforcing steel bar to manufacture a finished reinforcing steel bar product with standard length for building materials.
Preferably, the finished reinforcing steel bar comprises the following chemical components: carbon: 0.20 to 0.30 wt%, silicon: 1.50-2.00 wt%, manganese: 1.00-1.80 wt%, vanadium: 0.05 to 0.08 wt%, nitrogen: 0.01 to 0.03 wt%, chromium: 0.10-1.00 wt%, molybdenum: 0.02 to 1.00 wt%, phosphorus: 0.01 to 0.025 wt%, sulfur: 0.01 to 0.025 wt%, oxygen: 0.0001-0.0002 wt%, and the balance of Fe impurity.
Preferably, the hot rolling time and the hot rolling pass of the billet steel can be determined according to equipment model matching.
The invention has the technical effects and advantages that: the vanadium-nitrogen steel bar for building materials with good anti-seismic effect is provided with a plurality of groups of height-measuring annular steel bodies on the bar body, which is beneficial for workers to mutually refer when inserting a plurality of groups of steel bars at the same line surface position during the construction, so that the heights of the steel bars of all groups are basically consistent, thereby facilitating the construction of production and construction, the annular binding groove arranged on the height-measuring annular steel body is convenient for the workers to bind the steel bars of the groups together by using iron wires, facilitating the operation of the workers and increasing the construction efficiency, after a proper amount of vanadium-nitrogen alloy and a small amount of nitriding reinforcing agent are added in the steelmaking process to obtain a required steel billet, the beginning rolling temperature, the final rolling temperature, the rolling speed, the rolling pass and the rolling time are controlled by a hot rolling process, the precipitation strengthening effect and the grain refining effect of V can be fully exerted, the strength of the steel bar is obviously improved, and better plasticity and toughness are kept, the vanadium-nitrogen steel bar for building materials produced by the invention has stable process mechanical property, better extensibility, weldability, low strain timeliness and strong anti-seismic performance.
Drawings
Fig. 1 is a schematic view of the overall structure of the tendon body of the present invention.
FIG. 2 is a schematic structural view of the height measuring annular steel body and the annular binding groove.
FIG. 3 is a flow chart of the method of the present invention.
The reference signs are: 1. a tendon body; 2. measuring the height of the annular steel body; 3. and (5) annularly binding a groove.
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.
The vanadium-nitrogen steel bar for the building materials with good anti-seismic effect, as shown in the attached figures 1-2, comprises a bar body 1, wherein a plurality of height-measuring annular steel bodies 2 are welded on the bar body 1, and annular binding grooves 3 are formed in the height-measuring annular steel bodies 2.
The vanadium-nitrogen steel bar with good anti-seismic effect for building materials is prepared from the following raw materials in parts by mass:
20-30 parts of carbon, 200 parts of silicon 150, 180 parts of manganese 100, 5-8 parts of vanadium, 1-3 parts of nitrogen, 10-100 parts of chromium, 20-100 parts of molybdenum, 10-25 parts of phosphorus, 10-25 parts of sulfur, 0.01-0.02 part of oxygen and the balance of impurities of iron.
Further, the feed comprises the following raw materials in parts by mass: 20-25 parts of carbon, 150 parts of silicon, 180 parts of manganese, 150 parts of manganese, 5-7 parts of vanadium, 1-2 parts of nitrogen, 10-60 parts of chromium, 20-65 parts of molybdenum, 10-20 parts of phosphorus, 10-20 parts of sulfur, 0.01-0.015 part of oxygen and the balance of impurities of iron.
Further, the feed comprises the following raw materials in parts by mass: 25-30 parts of carbon, 200 parts of silicon 170-containing material, 180 parts of manganese 130-containing material, 6-8 parts of vanadium, 2-3 parts of nitrogen, 50-100 parts of chromium, 55-100 parts of molybdenum, 15-25 parts of phosphorus, 15-25 parts of sulfur, 0.015-0.02 part of oxygen and the balance of impurities of iron.
The production method of the vanadium-nitrogen steel bar for the building materials with good anti-seismic effect, which is shown in the attached figure 3, comprises the following steps:
preparation of S1 material: preparing raw materials such as impurities of carbon, silicon, manganese, vanadium, nitrogen, chromium, molybdenum, phosphorus, sulfur, oxygen and iron in parts by mass;
s2 continuous casting blank making: the raw materials are fused and made into molten steel through a steel making furnace, the molten steel is conveyed to a rotary table through a steel containing barrel, the molten steel is divided into a plurality of strands through a molten steel distributor, the strands are respectively injected into casting films with specific shapes, cooling, solidification and forming are started, casting blanks with outer solidified shells and inner molten steel are produced, then the casting blanks are drawn into arc-shaped casting channels, the casting blanks are continuously solidified to be completely solidified through secondary cooling, and then the casting blanks are cut into steel billets after being straightened;
s3 hot rolling of steel billet: feeding the billet into a heating furnace with the furnace temperature of 1100-1200 ℃ at the soaking section, heating for 60-120 minutes to ensure that the initial rolling temperature of the billet is 1050-1100 ℃, and carrying out rough rolling for 6 passes under the rolling condition of the speed of 0.8-1.3 m/s for 50-70 seconds; then, carrying out medium rolling for 6 passes under the rolling condition with the speed of 3.8-4.5 m/s for 60-80 seconds; finally, finish rolling for 2-6 passes under the rolling condition that the speed is 7.0-15.0 m/s, wherein the rolling time is 55-75 seconds in total, and the final rolling temperature is controlled to be 950-980 ℃;
s4, cooling: naturally cooling the finish rolled steel on a cooling bed to room temperature in an air cooling mode, and obtaining the vanadium-nitrogen reinforcing steel bar for the building material with good anti-seismic effect;
s5 cutting and forming: and cutting and polishing the reinforcing steel bar to manufacture a finished reinforcing steel bar product with standard length for building materials.
Further, the finished reinforcing steel bar comprises the following chemical components: carbon: 0.20 to 0.30 wt%, silicon: 1.50-2.00 wt%, manganese: 1.00-1.80 wt%, vanadium: 0.05 to 0.08 wt%, nitrogen: 0.01 to 0.03 wt%, chromium: 0.10-1.00 wt%, molybdenum: 0.02 to 1.00 wt%, phosphorus: 0.01 to 0.025 wt%, sulfur: 0.01 to 0.025 wt%, oxygen: 0.0001-0.0002 wt%, and the balance of Fe impurity.
Further, the hot rolling time and the hot rolling pass of the steel billet can be determined according to the matching of the equipment models.
Example one
A vanadium-nitrogen steel bar with good anti-seismic effect for building materials is prepared from the following raw materials in parts by mass:
20g of carbon, 150g of silicon, 100g of manganese, 5g of vanadium, 1g of nitrogen, 10g of chromium, 20g of molybdenum, 10g of phosphorus, 10g of sulfur, 0.01g of oxygen and the balance of impurities of iron.
The production method of the vanadium-nitrogen steel bar with good anti-seismic effect for the building materials comprises the following steps:
s1: preparing materials: preparing raw materials such as impurities of carbon, silicon, manganese, vanadium, nitrogen, chromium, molybdenum, phosphorus, sulfur, oxygen and iron in parts by mass;
s2: continuous casting and blank making: the raw materials are fused and made into molten steel through a steel making furnace, the molten steel is conveyed to a rotary table through a steel containing barrel, the molten steel is divided into a plurality of strands through a molten steel distributor, the strands are respectively injected into casting films with specific shapes, cooling, solidification and forming are started, casting blanks with outer solidified shells and inner molten steel are produced, then the casting blanks are drawn into arc-shaped casting channels, the casting blanks are continuously solidified to be completely solidified through secondary cooling, and then the casting blanks are cut into steel billets after being straightened;
s3: hot rolling of steel billets: feeding the billet into a heating furnace with the furnace temperature of 1100-1200 ℃ at the soaking section, heating for 60-120 minutes to ensure that the initial rolling temperature of the billet is 1050-1100 ℃, and carrying out rough rolling for 6 passes under the rolling condition of the speed of 0.8-1.3 m/s for 50-70 seconds; then, carrying out medium rolling for 6 passes under the rolling condition with the speed of 3.8-4.5 m/s for 60-80 seconds; finally, finish rolling for 2-6 passes under the rolling condition that the speed is 7.0-15.0 m/s, wherein the rolling time is 55-75 seconds in total, and the final rolling temperature is controlled to be 950-980 ℃;
s4: and (3) cooling: naturally cooling the finish rolled steel on a cooling bed to room temperature in an air cooling mode, and obtaining the vanadium-nitrogen reinforcing steel bar for the building material with good anti-seismic effect;
s5: cutting and forming: and cutting and polishing the reinforcing steel bar to manufacture a finished reinforcing steel bar product with standard length for building materials.
Example two:
a vanadium-nitrogen steel bar with good anti-seismic effect for building materials is prepared from the following raw materials in parts by mass:
30g of carbon, 200g of silicon, 180g of manganese, 8g of vanadium, 3g of nitrogen, 8g of chromium, 100g of molybdenum, 25g of phosphorus, 25g of sulfur, 0.02g of oxygen and the balance of impurities of iron.
The production method of the vanadium-nitrogen steel bar with good anti-seismic effect for the building materials comprises the following steps:
s1: preparing materials: preparing raw materials such as impurities of carbon, silicon, manganese, vanadium, nitrogen, chromium, molybdenum, phosphorus, sulfur, oxygen and iron in parts by mass;
s2: continuous casting and blank making: the raw materials are fused and made into molten steel through a steel making furnace, the molten steel is conveyed to a rotary table through a steel containing barrel, the molten steel is divided into a plurality of strands through a molten steel distributor, the strands are respectively injected into casting films with specific shapes, cooling, solidification and forming are started, casting blanks with outer solidified shells and inner molten steel are produced, then the casting blanks are drawn into arc-shaped casting channels, the casting blanks are continuously solidified to be completely solidified through secondary cooling, and then the casting blanks are cut into steel billets after being straightened;
s3: hot rolling of steel billets: feeding the billet into a heating furnace with the furnace temperature of 1100-1200 ℃ at the soaking section, heating for 60-120 minutes to ensure that the initial rolling temperature of the billet is 1050-1100 ℃, and carrying out rough rolling for 6 passes under the rolling condition of the speed of 0.8-1.3 m/s for 50-70 seconds; then, carrying out medium rolling for 6 passes under the rolling condition with the speed of 3.8-4.5 m/s for 60-80 seconds; finally, finish rolling for 2-6 passes under the rolling condition that the speed is 7.0-15.0 m/s, wherein the rolling time is 55-75 seconds in total, and the final rolling temperature is controlled to be 950-980 ℃;
s4: and (3) cooling: naturally cooling the finish rolled steel on a cooling bed to room temperature in an air cooling mode, and obtaining the vanadium-nitrogen reinforcing steel bar for the building material with good anti-seismic effect;
s5: cutting and forming: and cutting and polishing the reinforcing steel bar to manufacture a finished reinforcing steel bar product with standard length for building materials.
Example three:
a vanadium-nitrogen steel bar with good anti-seismic effect for building materials is prepared from the following raw materials in parts by mass:
25g of carbon, 175g of silicon, 140g of manganese, 6g of vanadium, 2g of nitrogen, 55g of chromium, 60g of molybdenum, 18g of phosphorus, 18g of sulfur, 0.015g of oxygen and the balance of impurities of iron.
The production method of the vanadium-nitrogen steel bar with good anti-seismic effect for the building materials comprises the following steps:
s1: preparing materials: preparing raw materials such as impurities of carbon, silicon, manganese, vanadium, nitrogen, chromium, molybdenum, phosphorus, sulfur, oxygen and iron in parts by mass;
s2: continuous casting and blank making: the raw materials are fused and made into molten steel through a steel making furnace, the molten steel is conveyed to a rotary table through a steel containing barrel, the molten steel is divided into a plurality of strands through a molten steel distributor, the strands are respectively injected into casting films with specific shapes, cooling, solidification and forming are started, casting blanks with outer solidified shells and inner molten steel are produced, then the casting blanks are drawn into arc-shaped casting channels, the casting blanks are continuously solidified to be completely solidified through secondary cooling, and then the casting blanks are cut into steel billets after being straightened;
s3: hot rolling of steel billets: feeding the billet into a heating furnace with the furnace temperature of 1100-1200 ℃ at the soaking section, heating for 60-120 minutes to ensure that the initial rolling temperature of the billet is 1050-1100 ℃, and carrying out rough rolling for 6 passes under the rolling condition of the speed of 0.8-1.3 m/s for 50-70 seconds; then, carrying out medium rolling for 6 passes under the rolling condition with the speed of 3.8-4.5 m/s for 60-80 seconds; finally, finish rolling for 2-6 passes under the rolling condition that the speed is 7.0-15.0 m/s, wherein the rolling time is 55-75 seconds in total, and the final rolling temperature is controlled to be 950-980 ℃;
s4: and (3) cooling: naturally cooling the finish rolled steel on a cooling bed to room temperature in an air cooling mode, and obtaining the vanadium-nitrogen reinforcing steel bar for the building material with good anti-seismic effect;
s5: cutting and forming: and cutting and polishing the steel bar to manufacture a finished product of the building material steel bar with standard length.
The vanadium-nitrogen steel bars 1 to 3 prepared in the above embodiments are respectively prepared into samples from different raw materials, and then are subjected to comparison evaluation and analysis, and the seven indexes of yield strength, tensile strength, yield strength, uniform extensibility, extensibility after fracture, gray scale and shock resistance of the vanadium-nitrogen steel bars are monitored for the evaluation and absorption effects under the same conditions; the monitoring results are shown in table 1 below:
table 1 vanadium-nitrogen steel bars 1-3 samples prepared from different weight parts of raw materials were subjected to a comparison effect table under the same conditions.
| Item | Yield strength | Tensile strength | Yield strength | Uniform extensibility | Elongation after fracture | Grey scale | Shock resistance | Composite score |
| Example 1 | 437 | 587 | 74 | 9 | 19 | 9 | 99 | 1234 |
| Example 2 | 435 | 590 | 73 | 9.5 | 18 | 9.5 | 98 | 1233 |
| Example 3 | 440 | 580 | 75 | 9 | 17.5 | 8.5 | 99 | 1229 |
The working principle of the invention is as follows: the vanadium-nitrogen steel bar for building materials with good anti-seismic effect is provided with a plurality of groups of height-measuring annular steel bodies 2 on a bar body 1, which is helpful for workers to mutually refer when inserting a plurality of groups of steel bars at the same line surface position during building construction, so that the heights of the steel bars of all groups are basically consistent, and the construction of production construction is convenient, the annular binding groove 3 arranged on the height-measuring annular steel body 2 is convenient for workers to bind the steel bars of the groups together by iron wires, the operation of the workers is convenient, and the building construction efficiency is increased. The vanadium-nitrogen reinforcing steel bar for building materials produced by the method has the characteristics of stable process mechanical property, better extensibility, weldability, low strain timeliness and strong anti-seismic property.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (5)
1. The production method of the vanadium-nitrogen steel bar for the building materials with good anti-seismic effect comprises a bar body (1), and is characterized in that: the rib body (1) is welded with a plurality of height measurement annular steel bodies (2), an annular binding groove (3) is formed in each height measurement annular steel body (2), and the rib body (1) is made of the following raw materials in parts by mass:
20-30 parts of carbon, 200 parts of 150 parts of silicon, 180 parts of 100 parts of manganese, 5-8 parts of vanadium, 1-3 parts of nitrogen, 10-100 parts of chromium, 20-100 parts of molybdenum, 10-25 parts of phosphorus, 10-25 parts of sulfur, 0.01-0.02 part of oxygen and the balance of impurities of iron;
the finished product of the steel bar comprises the following chemical components: carbon: 0.20 to 0.30 wt%, silicon: 1.50-2.00 wt%, manganese: 1.00-1.80 wt%, vanadium: 0.05 to 0.08 wt%, nitrogen: 0.01 to 0.03 wt%, chromium: 0.10-1.00 wt%, molybdenum: 0.02 to 1.00 wt%, phosphorus: 0.01 to 0.025 wt%, sulfur: 0.01 to 0.025 wt%, oxygen: 0.0001-0.0002 wt% of iron, the balance being iron impurities;
the method comprises the following steps:
s1: preparing materials: preparing the impurity raw materials of carbon, silicon, manganese, vanadium, nitrogen, chromium, molybdenum, phosphorus, sulfur, oxygen and iron in parts by mass;
s2: continuous casting and blank making: the raw materials are fused and made into molten steel through a steel making furnace, the molten steel is conveyed to a rotary table through a steel containing barrel, the molten steel is divided into a plurality of strands through a molten steel distributor, the strands are respectively injected into casting films with specific shapes, cooling, solidification and forming are started, casting blanks with outer solidified shells and inner molten steel are produced, then the casting blanks are drawn into arc-shaped casting channels, the casting blanks are continuously solidified to be completely solidified through secondary cooling, and then the casting blanks are cut into steel billets after being straightened;
s3: hot rolling of steel billets: feeding the billet into a heating furnace with the furnace temperature of 1100-1200 ℃ at the soaking section, heating for 60-120 minutes to ensure that the initial rolling temperature of the billet is 1050-1100 ℃, and carrying out rough rolling for 6 passes under the rolling condition of the speed of 0.8-1.3 m/s for 50-70 seconds; then, carrying out medium rolling for 6 passes under the rolling condition with the speed of 3.8-4.5 m/s for 60-80 seconds in total; finally, finish rolling is carried out for 2-6 passes under the rolling condition that the speed is 7.0-15.0 m/s, the rolling time is 55-75 seconds in total, and the final rolling temperature is controlled to be 950-980 ℃;
s4: and (3) cooling: naturally cooling the finish rolled steel on a cooling bed to room temperature in an air cooling mode, and obtaining the vanadium-nitrogen reinforcing steel bar for the building material with good anti-seismic effect;
s5: cutting and forming: and cutting and polishing the reinforcing steel bar to manufacture a finished reinforcing steel bar product with standard length for building materials.
2. The method for producing vanadium-nitrogen steel bars for building materials with good earthquake resistance according to claim 1, wherein the hot rolling time and hot rolling pass of the steel billet are determined according to the matching of equipment models.
3. A vanadium-nitrogen reinforcing steel bar for building materials with good anti-seismic effect, which is manufactured by the method of claim 1 or 2, and is characterized in that: the vanadium-nitrogen steel bar with good anti-seismic effect for the building materials is prepared from the following raw materials in parts by mass:
20-25 parts of carbon, 150 parts of silicon, 180 parts of manganese, 150 parts of manganese, 5-7 parts of vanadium, 1-2 parts of nitrogen, 10-60 parts of chromium, 20-65 parts of molybdenum, 10-20 parts of phosphorus, 10-20 parts of sulfur, 0.01-0.015 part of oxygen and the balance of impurities of iron.
4. A vanadium-nitrogen reinforcing steel bar for building materials with good anti-seismic effect, which is manufactured by the method of claim 1 or 2, and is characterized in that: the vanadium-nitrogen steel bar with good anti-seismic effect for the building materials is prepared from the following raw materials in parts by mass:
25-30 parts of carbon, 200 parts of silicon 170-containing material, 180 parts of manganese 130-containing material, 6-8 parts of vanadium, 2-3 parts of nitrogen, 50-100 parts of chromium, 55-100 parts of molybdenum, 15-25 parts of phosphorus, 15-25 parts of sulfur, 0.015-0.02 part of oxygen and the balance of impurities of iron.
5. A vanadium-nitrogen reinforcing steel bar for building materials with good anti-seismic effect, which is manufactured by the method of claim 1 or 2, and is characterized in that: the vanadium-nitrogen steel bar with good anti-seismic effect for building materials is prepared from the following raw materials in parts by mass:
25 parts of carbon, 175 parts of silicon, 140 parts of manganese, 6 parts of vanadium, 2 parts of nitrogen, 55 parts of chromium, 60 parts of molybdenum, 18 parts of phosphorus, 18 parts of sulfur, 0.015 part of oxygen and the balance of impurities of iron.
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