CN111020352A - Production and manufacturing method of weather-resistant and acid-resistant wire rod for animal husbandry - Google Patents
Production and manufacturing method of weather-resistant and acid-resistant wire rod for animal husbandry Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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Abstract
The embodiment of the invention provides a production and manufacturing method of a weather-resistant and acid-resistant wire rod for animal husbandry, which comprises the following steps in sequence: molten iron desulfurization, 150-ton top-bottom combined blowing converter, argon blowing after furnace, LF furnace refining, 165mm × 165mm square billet continuous casting, casting blank heating, high-pressure water descaling, high-speed wire rod rolling and controlled cooling; the weather-resistant and acid-resistant wire rod for the animal husbandry comprises the following chemical components in percentage by weight: less than or equal to 0.07 wt% of carbon C, less than or equal to 0.10 wt% of silicon Si, manganese Mn: 0.20-0.30 wt%, phosphorus P is less than or equal to 0.025 wt%, sulfur S is less than or equal to 0.015 wt%, nickel Ni: 0.15-0.20 wt%, Cr: 0.62 to 0.75 wt%, Cu: 0.25 to 0.32 wt%, antimony Sb: 0.04-0.06 wt%, and the balance of Fe and inevitable trace elements.
Description
Technical Field
The invention belongs to the technical field of steel smelting, and relates to a production method of a weather-resistant and acid-resistant wire rod for animal husbandry.
Background
The cultivation cage has wide application in animal husbandry, especially specialized large-scale farms, and is currently processed by low-carbon steel hot-rolled round strips with the mark Q195, and the production and processing technology is as follows: phi 6.5mm wire rod → mechanical shelling (or acid washing) → coarse drawing → fine drawing → phi 1.85-3.0 mm steel wire → straightening, shearing → welding net forming → surface acid washing → hot dip galvanizing → air drying → grinding burr → cultivation cage finished product.
Because the breeding environment has high humidity and is in contact with weakly acidic poultry excrement, the corrosion speed of steel is high, and the surface of the breeding cage needs to be subjected to antiseptic treatment. At present, domestic breeding cage production enterprises mainly adopt a hot-dip galvanizing surface anticorrosion process, and a steel substrate is isolated from the atmosphere and acidic substances through a thicker zinc layer on the surface, so that the anticorrosion effect is achieved. The thickness of a zinc layer of the culture cage produced by the process is 80-100 mu m, the zinc consumption per unit area is 570-720 g/m2 calculated according to the diameter of a steel wire of 2.0mm, and the zinc consumption per ton of steel is 145-181 kg; the production and processing cost of the process is greatly increased, and the processing cost per ton of steel is up to 3600-4500 yuan calculated according to the unit price of a zinc ingot 25000 yuan per ton; moreover, when the surface zinc layer falls off due to scraping and the like, the culture cage produced by the conventional Q195 low-carbon steel hot-rolled circular strip through the process has the defect that the service life of the culture cage is greatly shortened due to poor atmospheric corrosion resistance and acid corrosion resistance of a steel matrix. With the continuous enhancement of the environmental protection treatment and the continuous increase of the environmental protection pressure, the backward process with high energy consumption and high pollution is inevitably eliminated.
In the process of implementing the invention, the applicant finds that at least the following problems exist in the prior art: the breeding cage manufactured by the existing production and manufacturing method of the breeding cage for animal husbandry has poor atmospheric corrosion resistance and acid corrosion resistance; the production method for manufacturing the culture cage by using the conventional Q195 wire rod has the defects of high energy consumption and high pollution.
Disclosure of Invention
The embodiment of the invention provides a production and manufacturing method of a weather-resistant and acid-resistant wire rod for animal husbandry, which solves the problems of poor atmospheric corrosion resistance and acid corrosion resistance of the wire rod produced by the prior art by redesigning the chemical components of steel and finely controlling the steel making and rolling processes, and the produced wire rod also has the advantages of good drawing performance, strong steel wire resilience and the like.
In order to achieve the above object, an embodiment of the present invention provides a method for manufacturing a weather-resistant and acid-resistant wire rod for animal husbandry, comprising: the production process of the weather-resistant and acid-resistant steel wire rod sequentially comprises the following steps: molten iron desulfurization, 150-ton top-bottom combined blowing converter, argon blowing after furnace, LF furnace refining, 165mm × 165mm square billet continuous casting, casting blank heating, high-pressure water descaling, high-speed wire rod rolling and controlled cooling; the weather-resistant and acid-resistant wire rod for the animal husbandry comprises the following chemical components in percentage by weight: less than or equal to 0.07 wt% of carbon C, less than or equal to 0.10 wt% of silicon Si, manganese Mn: 0.20-0.30 wt%, phosphorus P is less than or equal to 0.025 wt%, sulfur S is less than or equal to 0.015 wt%, nickel Ni: 0.15-0.20 wt%, Cr: 0.62 to 0.75 wt%, Cu: 0.25 to 0.32 wt%, antimony Sb: 0.04-0.06 wt%, and the balance of Fe and inevitable trace elements.
Further, the binary alkalinity of the converter final slag in the 150-ton top-bottom combined blowing converter is controlled within the range of 2.5-3.5, the carbon C content at the blowing end point is 0.03-0.06 wt%, the phosphorus P content is less than or equal to 0.020 wt%, the steel is discharged for 30 s-3 min for deoxidation and alloying in a steel ladle, 1.28-2.56 kg/t of low-carbon ferromanganese, 11.5-13.8 kg/t of low-carbon ferrochrome, 1.61-2.15 kg/t of nickel plate, 2.66-3.18 kg/t of copper plate, 0.42-0.63 kg/t of antimony ingot, 1.33-2.80 kg/t of steel core aluminum, 0.67-2.07 kg/t of silicon calcium barium, 0.34-2.07 kg/t of silicon aluminum calcium barium, and the steel is transferred to a post-converter blowing station after the steel discharge.
Further, the argon blowing after the furnace is strong argon blowing, and the flow of the argon is more than or equal to 21m3The time is 3-5 min.
Further, the LF refining is that slag making materials are added at the early stage of the LF refining: 2.0-1.0 kg/t of lime, 0.5-2.0 kg/t of quartz sand and 0.5-2.0 kg/t of multifunctional deoxidizer, calcium treatment is carried out after refining, 0.86-1.8 m/t of pure calcium line is fed, and the flow of soft argon-blowing argon is less than or equal to 9m3The time is 8-10 min, the aluminum Als in the steel is controlled within the range of 0.0040-0.0060 wt%, and the oxygen O is controlled within the range of 0.0010-0.0025 wt%.
Furthermore, the secondary cooling specific water amount of the 165mm × 165mm square billet continuous casting is 1.2L/kg, and the drawing speed is 2.4-2.8 m/min.
Further, a casting blank low-temperature short-time heating process is adopted in the casting blank heating step, the casting blank is hot-fed and hot-charged, the temperature of the casting blank in a heating furnace is more than 450 ℃, the heating temperature is 1050 ℃, and the heating time is less than or equal to 90 min.
Furthermore, in the high-speed wire rod rolling step, the opening rolling temperature is 1000 ℃, the finish rolling temperature is 970 ℃, and the spinning temperature is 960 ℃.
Furthermore, the controlled cooling adopts a slow cooling process, and the cooling speed is controlled to be below 0.40 ℃/s.
The technical scheme has the following beneficial effects: through the chemical composition system designed by the invention and the control of the steelmaking, continuous casting and steel rolling processes, the produced phi 6.5mm weather-resistant and acid-resistant wire rod is proved to have obviously better atmospheric and acid corrosion resistance than the common Q195 wire rod through an artificial atmosphere corrosion test (salt spray test). Wherein, after 168-hour neutral salt spray test (NSS), the weight loss rate of the weather-resistant and acid-resistant wire rod is 0.52 percent, and the weight loss rate of the Q195 wire rod is 1.46 percent; after 168 hours of copper accelerated acetate spray test (CASS), the weight loss rate of the weather-resistant and acid-resistant wire rod is 0.80%, and the weight loss rate of the Q195 wire rod is 2.66%. In addition, the weather-resistant and acid-resistant wire rod produced by the method has good surface quality, and does not have surface defects such as cracks, scars and the like; the wire rod produced by the method of the invention is drawn to phi 1.85 mm-phi 3.0mm without wire breakage; the finished steel wire has good rebound resilience, and the egg breaking rate is reduced from more than 5% to less than 1% after the finished steel wire is applied to breeding enterprises.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a drawing of the acid pickling of a casting blank in the production process of a weather-resistant and acid-resistant steel wire rod with the designation of LGQ195NHS
FIG. 2 is a surface quality diagram of a weather-resistant and acid-resistant steel wire rod with the mark of LGQ195NHS of the invention
FIG. 3 is a metallographic structure drawing of a weather-resistant and acid-resistant steel wire rod of LGQ195NHS of the present invention at 100 times magnification
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 embodiment of the invention provides a production and manufacturing method of a weather-resistant and acid-resistant wire rod for animal husbandry, which comprises the following steps: the production process of the weather-resistant and acid-resistant steel wire rod sequentially comprises the following steps: molten iron desulfurization, 150-ton top-bottom combined blown converter, argon blowing after furnace, LF furnace refining, 165mm × 165mm square billet continuous casting, casting blank heating, high-pressure water descaling, high-speed wire rod rolling, controlled cooling, coil collecting, inspection, packaging and warehousing;
copper, chromium and nickel are elements which are necessary for the production of the general weathering steel. The copper element plays a role of an active cathode in the corrosion process of the steel to ensure that the steel generates anode passivation and reacts with sulfur in the steel to generateTo Cu2The S passivation film inhibits the cathode and the anode from generating chemical reaction; chromium element can form a compact oxide film on the surface of steel; the nickel can change the self-corrosion potential of the steel to the positive direction, and the stability of the steel is improved. The addition of the elements ensures that the steel has the characteristic of atmospheric corrosion resistance, but in order to meet the service requirements of atmospheric corrosion resistance and acid corrosion resistance, the component design of the invention is added with the antimony element, the addition of the antimony element can inhibit the anode reaction and form Cu on the surface of the steel2Sb film, which has good anticorrosion effect on weak acid.
On the basis of meeting the requirements of atmospheric corrosion resistance and acid corrosion resistance, the influences of the drawing performance of a wire rod, the resilience performance of a steel wire, the economical efficiency of alloy and four corrosion-resistant elements on the performance of steel are considered, and finally, the chemical components are designed as follows:
the weather-resistant and acid-resistant wire rod for the animal husbandry comprises the following chemical components in percentage by weight: less than or equal to 0.07 wt% of carbon C, less than or equal to 0.10 wt% of silicon Si, manganese Mn: 0.20-0.30 wt%, phosphorus P is less than or equal to 0.025 wt%, sulfur S is less than or equal to 0.015 wt%, nickel Ni: 0.15-0.20 wt%, Cr: 0.62 to 0.75 wt%, Cu: 0.25 to 0.32 wt%, antimony Sb: 0.04-0.06 wt%, and the balance of Fe and inevitable trace elements.
Further, the binary alkalinity (calcium oxide CaO/silicon dioxide SiO) of the converter final slag in the 150-ton top-bottom combined blown converter2) Controlling the range of 2.5-3.5, controlling the carbon C content at the blowing end point to be 0.03-0.06 wt%, the phosphorus P content to be less than or equal to 0.020 wt%, deoxidizing and alloying in a steel ladle after tapping for 30 s-3 min, respectively adding 1.28-2.56 kg/t of low-carbon ferromanganese, 11.5-13.8 kg/t of low-carbon ferrochromium, 1.61-2.15 kg/t of nickel plate, 2.66-3.18 kg/t of copper plate, 0.42-0.63 kg/t of antimony ingot, 1.33-2.80 kg/t of steel core aluminum, 0.67-2.07 kg/t of silicon calcium barium and 0.34-2.07 kg/t of silicon aluminum calcium barium, and transferring to an argon blowing station after tapping.
The argon blowing after the furnace is strong argon blowing, and the argon flow is more than or equal to 21m3And h, the time is 3-5 min, so that the alloy added into the molten steel is fully and uniformly stirred.
Further, the LF refining is that slag making materials are added at the early stage of the LF refining: 2.0-1.0 kg/t lime, 0.5-2.0 kg/t quartz sand, 0.5-2.0 kg/t multifunctional deoxidizer, and refiningCalcium treatment is carried out, 0.86-1.8 m/t of pure calcium line is fed, argon is blown softly, and the flow of argon is less than or equal to 9m3The time is 8-10 min, the aluminum Als in the steel is controlled within the range of 0.0040-0.0060 wt%, and the oxygen O is controlled within the range of 0.0010-0.0025 wt%.
Furthermore, the secondary cooling specific water amount in the continuous casting of the 165mm × 165mm square billet is 1.2L/kg, the drawing speed is 2.4-2.8 m/min, and the phenomenon that the copper Cu and antimony Sb elements generate grain boundary segregation to cause net cracks on the surface of the casting blank is avoided.
Further, a casting blank low-temperature short-time heating process is adopted in the casting blank heating step, the casting blank is hot-fed and is heated in a heating furnace at the temperature of more than 450 ℃ and the heating temperature of 1050 ℃, long-time heating is avoided, and the heating time is less than or equal to 90 min; the method prevents the serious enrichment of Cu and Sb elements at an oxide layer and a crystal boundary, and avoids the generation of reticular cracks on the surface of a casting blank in the high-temperature deformation process when the casting blank is heated at high temperature and for a long time.
Furthermore, in the high-speed wire rod rolling step, the opening rolling temperature is 1000 ℃, the finish rolling temperature is 970 ℃, and the spinning temperature is 960 ℃.
Further, after spinning, a slow cooling process is adopted for controlling cooling, the stelmor roller speed is 10m/min, the heat-insulating cover and the fan are all closed, the cooling speed is controlled to be below 0.40 ℃/s, uniform ferrite tissues are ensured to be obtained, mixed crystal tissues are avoided, and the drawing performance of the wire rod and the rebound resilience of finished steel wires are improved.
The embodiment provided by the invention is to use the invention to produce the weather-resistant and acid-resistant steel wire rod with the mark of LGQ195NHS, and the chemical components are shown in the table 2. The production process of the wire rod comprises the following steps: preparing smelting raw materials according to the chemical composition of LGQ195NHS weather-resistant and acid-resistant steel wire rods, and sequentially carrying out KR molten iron pre-desulfurization treatment → 150 tons of top-bottom combined blowing converter → argon blowing behind the converter → LF furnace refining → 165mm multiplied by 165mm square billet continuous casting → casting blank heating → high-pressure water descaling → high-speed wire rolling → controlled cooling → coil collection → inspection, packaging and warehousing. The target superheat degree of molten steel in continuous casting is controlled to be 20-30 ℃, the secondary cooling specific water quantity is 1.22L/kg, the drawing speed is 2.62-2.70 m/min, the temperature of a casting blank in the straightening process is 680-710 ℃, and a high-temperature brittle zone of 725-825 ℃ is avoided. The casting blank is subjected to acid cleaning inspection, and no net cracks appear on the surface, as shown in figure 1.
Heating the continuous casting slab in a heating furnace in a neutral atmosphere to 1050 +/-15 ℃, preserving heat for 80-90 min, removing scale from the slab out of the heating furnace by using high-pressure water, rolling the slab to phi 6.5mm specification by using a 28-stand rolling mill, controlling the rolling temperature to 1000 +/-15 ℃, the finish rolling temperature to 970 +/-15 ℃, the spinning temperature to 960 +/-15 ℃, the stelmor roller speed to 10m/min, completely closing a heat preservation cover and a fan, controlling the cooling speed to be below 0.40 ℃/s, wherein the finished wire rod has no surface defects such as cracks, scabs and the like, the metallographic structure is uniform ferrite 2+ a little pearlite 1, the grain size grade is 9.5-10, the surface quality of the wire rod is shown in figure 2, and the surface of the wire rod is smooth and has no surface defects such as net cracks, transverse cracks, scabs, pits and the like. The metallographic structure is shown in figure 3, and the mechanical properties of the wire rod are shown in table 3.
Through the chemical composition system designed by the invention and the control of the steelmaking, continuous casting and steel rolling processes, the produced phi 6.5mm weather-resistant and acid-resistant wire rod is proved to have obviously better atmospheric and acid corrosion resistance than the common Q195 wire rod through an artificial neutral atmosphere corrosion test (salt spray test). The results of 168 hour neutral salt spray test (NSS) and copper accelerated acetate spray test (CASS) are shown in table 4, wherein the weight loss rate of the weather-resistant and acid-resistant wire rod is 0.51% and the weight loss rate of the Q195 wire rod is 1.46% through the 168 hour neutral salt spray test (NSS); after 168 hours of copper accelerated acetate spray test (CASS), the weight loss of the weather-resistant and acid-resistant wire rod is 0.81%, and the weight loss of the Q195 wire rod is 2.66%. The test proves that the atmospheric and acid corrosion resistance of the LGQ195NHS weather-resistant and acid-resistant steel wire rod is obviously superior to that of the common Q195 wire rod.
In addition, the weather-resistant and acid-resistant wire rod produced by the method has good surface quality, and does not have surface defects such as cracks, scars and the like; the downstream user does not break the wire when drawing to phi 1.85 mm-phi 3.0 mm; the finished steel wire has good rebound resilience, and the egg breaking rate is reduced from more than 5% to less than 1% after the finished steel wire is applied to breeding enterprises.
TABLE 2 chemical composition
TABLE 3 mechanical Properties of the wire rod
TABLE 4 comparison of salt spray tests
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A production and manufacturing method of weather-resistant and acid-resistant wire rod for animal husbandry is characterized by comprising the following steps:
the manufacturing method comprises the following steps which are carried out in sequence: molten iron desulfurization, 150-ton top-bottom combined blowing converter, argon blowing after furnace, LF furnace refining, 165mm × 165mm square billet continuous casting, casting blank heating, high-pressure water descaling, high-speed wire rod rolling and controlled cooling; the weather-resistant and acid-resistant wire rod for the animal husbandry comprises the following chemical components in percentage by weight: less than or equal to 0.07 wt% of carbon C, less than or equal to 0.10 wt% of silicon Si, manganese Mn: 0.20-0.30 wt%, phosphorus P is less than or equal to 0.025 wt%, sulfur S is less than or equal to 0.015 wt%, nickel Ni: 0.15-0.20 wt%, Cr: 0.62 to 0.75 wt%, Cu: 0.25 to 0.32 wt%, antimony Sb: 0.04-0.06 wt%, and the balance of Fe and inevitable trace elements.
2. The method for manufacturing the weather-resistant and acid-resistant wire rod for animal husbandry according to claim 1, wherein the manufacturing method comprises the following steps:
the binary alkalinity of the converter final slag in the 150-ton top-bottom combined blowing converter is controlled within the range of 2.5-3.5, the carbon C content at the blowing end point is 0.03-0.06 wt%, the phosphorus P content is less than or equal to 0.020 wt%, steel tapping is carried out for 30 s-3 min, deoxidation and alloying are carried out in a steel ladle, 1.28-2.56 kg/t of low-carbon ferromanganese, 11.5-13.8 kg/t of low-carbon ferrochrome, 1.61-2.15 kg/t of nickel plate, 2.66-3.18 kg/t of copper plate, 0.42-0.63 kg/t of antimony ingot, 1.33-2.80 kg/t of steel core aluminum, 0.67-2.07 kg/t of silicon calcium barium, 0.34-2.07 kg/t of silicon aluminum calcium barium are respectively added, and the converter final slag is transferred to a post-furnace argon blowing station after the steel.
3. The method for manufacturing the weather-resistant and acid-resistant wire rod for animal husbandry according to claim 1, wherein the manufacturing method comprises the following steps:
the argon blowing after the furnace is strong argon blowing, and the argon flow is more than or equal to 21m3The time is 3-5 min.
4. The method for manufacturing the weather-resistant and acid-resistant wire rod for animal husbandry according to claim 1, wherein the manufacturing method comprises the following steps:
the LF refining is characterized in that a slag making material is added at the early stage of the LF refining: 2.0-1.0 kg/t of lime, 0.5-2.0 kg/t of quartz sand and 0.5-2.0 kg/t of multifunctional deoxidizer, calcium treatment is carried out after refining, 0.86-1.8 m/t of pure calcium line is fed, argon is blown softly, and the flow of argon is less than or equal to 9m3The time is 8-10 min, the aluminum Als in the steel is controlled within the range of 0.0040-0.0060 wt%, and the oxygen O is controlled within the range of 0.0010-0.0025 wt%.
5. The method for manufacturing the weather-resistant and acid-resistant wire rod for animal husbandry according to claim 1, wherein the manufacturing method comprises the following steps:
the secondary cooling specific water amount in the 165mm x 165mm square billet continuous casting is 1.2L/kg, and the drawing speed is 2.4-2.8 m/min.
6. The method for manufacturing the weather-resistant and acid-resistant wire rod for animal husbandry according to claim 1, wherein the manufacturing method comprises the following steps:
the casting blank heating step adopts a casting blank low-temperature short-time heating process, the casting blank is hot-fed and hot-charged, the temperature of the casting blank in a heating furnace is more than 450 ℃, the heating temperature is 1050 ℃, and the heating time is less than or equal to 90 min.
7. The method for manufacturing the weather-resistant and acid-resistant wire rod for animal husbandry according to claim 1, wherein the manufacturing method comprises the following steps:
in the high-speed wire rod rolling step, the open rolling temperature is 1000 ℃, the finish rolling temperature is 970 ℃, and the spinning temperature is 960 ℃.
8. The method for manufacturing the weather-resistant and acid-resistant wire rod for animal husbandry according to claim 1, wherein the manufacturing method comprises the following steps:
the controlled cooling adopts a slow cooling process, and the cooling speed is controlled to be below 0.40 ℃/s.
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| CN113118405A (en) * | 2021-03-10 | 2021-07-16 | 首钢集团有限公司 | Small square billet continuous casting method of antimony-containing weather-resistant bolt steel |
| CN113351654A (en) * | 2021-06-29 | 2021-09-07 | 新疆天山钢铁巴州有限公司 | Control method for slow cooling process of high-speed wire air-cooled roller way |
| CN114574766A (en) * | 2022-03-04 | 2022-06-03 | 武安市裕华钢铁有限公司 | Ni-RE series corrosion-resistant low-carbon hot-rolled steel strip and production process thereof |
| CN115572909A (en) * | 2022-10-28 | 2023-01-06 | 本钢板材股份有限公司 | Preparation method of hot-rolled wire rod for blasting lead |
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| CN103667877A (en) * | 2013-12-16 | 2014-03-26 | 天津钢铁集团有限公司 | Production method for wire rod for steel wool |
| CN105200349A (en) * | 2015-10-28 | 2015-12-30 | 天津钢铁集团有限公司 | Method for producing sulfuric acid dew-point corrosion-resistant round steel 09CrCuSb |
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| CN113118405A (en) * | 2021-03-10 | 2021-07-16 | 首钢集团有限公司 | Small square billet continuous casting method of antimony-containing weather-resistant bolt steel |
| CN113351654A (en) * | 2021-06-29 | 2021-09-07 | 新疆天山钢铁巴州有限公司 | Control method for slow cooling process of high-speed wire air-cooled roller way |
| CN114574766A (en) * | 2022-03-04 | 2022-06-03 | 武安市裕华钢铁有限公司 | Ni-RE series corrosion-resistant low-carbon hot-rolled steel strip and production process thereof |
| CN115572909A (en) * | 2022-10-28 | 2023-01-06 | 本钢板材股份有限公司 | Preparation method of hot-rolled wire rod for blasting lead |
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