CN112522627A - 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and production process thereof - Google Patents
600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and production process thereof Download PDFInfo
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- CN112522627A CN112522627A CN202011426674.XA CN202011426674A CN112522627A CN 112522627 A CN112522627 A CN 112522627A CN 202011426674 A CN202011426674 A CN 202011426674A CN 112522627 A CN112522627 A CN 112522627A
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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
- C21—METALLURGY OF IRON
- 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
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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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- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Abstract
The invention belongs to the technical field of steel production, and particularly relates to a 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar which comprises the following components in percentage by weight: 0.25% of C, 0.5% of Si, 1.35% of Mn, 0.07% of V, 0.04% of Ti, 0.016% of N, 0.45% of Gr, 0.025% of P, 0.025% of S, 97.264% of Fe and inevitable impurities. Electric furnace smelting, external refining, continuous casting, heating, rolling control, controlled cooling after rolling and cooling by a cooling bed; the heating temperature is 1200 ℃, the soaking temperature is 1140 ℃, the initial rolling temperature is 1025 ℃, the final rolling temperature is 1000 ℃, the controlled cooling pressure is 06MPa, the temperature of the deformed steel bar on a cooling bed is 880 ℃, and the tissue transformation time is 460 s. On the premise of reducing the use amount of the noble alloy, the comprehensive performance of the product is stabilized, and the hydrogen oxide corrosion resistance is improved.
Description
Technical Field
The invention belongs to the technical field of steel production, and particularly relates to a 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and a production process thereof.
Background
With the recent heavy use and popularization of high-strength thread steel bars in national key projects, steel bars with higher strength grades are required to be used as technical reserves, 600 MPa-grade hot-rolled ribbed steel bars are firstly compiled into GB/T1499.2-2018 standards, and at present, production processes of various production enterprises are different, so that the HRB 600-grade steel bars have unstable characteristic indexes such as yield ratio, elongation and the like, and the resistance to hydrogen oxide corrosion is not solved. In order to solve the problems, the alloy addition control structure is optimized from the smelting process to the rolling process, and various performance indexes are improved on the premise of reducing the use amount of the precious alloy. Therefore, it is very necessary to design a 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and a production process thereof.
Disclosure of Invention
The invention aims to provide a 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and a production process thereof. On the premise of reducing the use amount of the noble alloy, the comprehensive performance of the product is stabilized, and the hydrogen oxide corrosion resistance is improved.
The technical scheme adopted by the invention is as follows: a600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar comprises the following components in percentage by weight: 0.23-0.27% of C, 0.4-0.6% of Si, 1.25-1.45% of Mn, 0.06-0.08% of V, 0.03-0.05% of Ti, 0.012-0.02% of N, 0.4-0.5% of Gr, less than or equal to 0.035% of P, less than or equal to 0.035% of S, and the balance of Fe and inevitable impurities.
Further, the steel bar comprises the following components in percentage by weight: 0.23% of C, 0.4% of Si, 1.25% of Mn, 0.06% of V, 0.03% of Ti, 0.012% of N, 0.4% of Gr, 0.015% of P, 0.015% of S, 97.588% of Fe and inevitable impurities.
Further, the steel bar comprises the following components in percentage by weight: 0.25% of C, 0.5% of Si, 1.35% of Mn, 0.07% of V, 0.04% of Ti, 0.016% of N, 0.45% of Gr, 0.025% of P, 0.025% of S, 97.264% of Fe and inevitable impurities.
Further, the steel bar comprises the following components in percentage by weight: 0.27% of C, 0.6% of Si, 1.45% of Mn, 0.08% of V, 0.05% of Ti, 0.02% of N, 0.5% of Gr, 0.035% of P, 0.035% of S, 96.96% of Fe and inevitable impurities.
Further, the production process comprises the following steps: smelting in a converter or an electric furnace, refining outside the furnace, continuous casting (protective casting), heating, controlled rolling, controlled cooling after rolling and air cooling in a cooling bed; the heating temperature is 1150-1240 ℃, the soaking temperature is 1100-1180 ℃, the initial rolling temperature is 1000-1050 ℃, the final rolling temperature is 970-1030 ℃, the controlled cooling pressure is 0.4-0.8MPa, the temperature of the upper cooling bed of the deformed steel bar is 850-920 ℃, and the tissue transformation time is 370-560 s.
The invention has the beneficial effects that: provides a 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and a production process thereof. On the premise of reducing the use amount of the noble alloy, the comprehensive performance of the product is stabilized, and the hydrogen oxide corrosion resistance is improved. Realizing the control of narrow components of micro-alloy elements; targeting and positioning the content range of N in the steel; matching the whole process in the rolling process; the grain size of the structure F + P is stabilized at 8.5-9.5 levels according to different specifications, and the corrosion resistance is improved. The yield strength is 630-700MPa, the tensile strength is 750-900MPa, the yield ratio is 1.26-1.36, and the elongation after fracture is 17% -24%. The formation and precipitation of V (C, N) and Ti (C, N) fine particles are promoted by controlling the contents of V, Ti and N in steel, the process parameters of steelmaking and steel rolling are strictly controlled, the strength and the corrosion resistance of the steel bar are obviously improved, and all indexes of the steel bar meet the requirements of anti-seismic steel bars, so that the steel bar has practical significance of energy conservation, emission reduction, safety and environmental protection.
The specific implementation mode is as follows:
example one
A600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar comprises the following components in percentage by weight: 0.23% of C, 0.4% of Si, 1.25% of Mn, 0.06% of V, 0.03% of Ti, 0.012% of N, 0.4% of Gr, 0.015% of P, 0.015% of S, 97.588% of Fe and inevitable impurities.
Example two
A600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar comprises the following components in percentage by weight: 0.25% of C, 0.5% of Si, 1.35% of Mn, 0.07% of V, 0.04% of Ti, 0.016% of N, 0.45% of Gr, 0.025% of P, 0.025% of S, 97.264% of Fe and inevitable impurities.
EXAMPLE III
A600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar comprises the following components in percentage by weight: 0.27% of C, 0.6% of Si, 1.45% of Mn, 0.08% of V, 0.05% of Ti, 0.02% of N, 0.5% of Gr, 0.035% of P, 0.035% of S, 96.96% of Fe and inevitable impurities.
Example four
A production process of a 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar comprises the following steps: smelting in a converter or an electric furnace, refining outside the furnace, continuous casting (protective casting), heating, controlled rolling, controlled cooling after rolling and air cooling in a cooling bed; the heating temperature is 1200 ℃, the soaking temperature is 1140 ℃, the initial rolling temperature is 1025 ℃, the final rolling temperature is 1000 ℃, the controlled cooling pressure is 06MPa, the temperature of the deformed steel bar on a cooling bed is 880 ℃, and the tissue transformation time is controlled at 460 s.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, which are not to be construed as limiting the invention to the specific embodiments described above. Numerous other simplifications or substitutions may be made without departing from the spirit of the invention as defined in the claims and the general concept thereof, which shall be construed to be within the scope of the invention.
Claims (5)
1. The 600 MPa-level high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar is characterized in that: the steel bar comprises the following components in percentage by weight: 0.23-0.27% of C, 0.4-0.6% of Si, 1.25-1.45% of Mn, 0.06-0.08% of V, 0.03-0.05% of Ti, 0.012-0.02% of N, 0.4-0.5% of Gr, less than or equal to 0.035% of P, less than or equal to 0.035% of S, and the balance of Fe and inevitable impurities.
2. The 600MPa grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar according to claim 1, wherein: the steel bar comprises the following components in percentage by weight: 0.23% of C, 0.4% of Si, 1.25% of Mn, 0.06% of V, 0.03% of Ti, 0.012% of N, 0.4% of Gr, 0.015% of P, 0.015% of S, 97.588% of Fe and inevitable impurities.
3. The 600MPa grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar according to claim 1, wherein: the steel bar comprises the following components in percentage by weight: 0.25% of C, 0.5% of Si, 1.35% of Mn, 0.07% of V, 0.04% of Ti, 0.016% of N, 0.45% of Gr, 0.025% of P, 0.025% of S, 97.264% of Fe and inevitable impurities.
4. The 600MPa grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar according to claim 1, wherein: the steel bar comprises the following components in percentage by weight: 0.27% of C, 0.6% of Si, 1.45% of Mn, 0.08% of V, 0.05% of Ti, 0.02% of N, 0.5% of Gr, 0.035% of P, 0.035% of S, 96.96% of Fe and inevitable impurities.
5. The production process of the 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar according to claim 1, characterized by comprising the following steps of: the production process comprises the following steps: smelting in a converter or an electric furnace, refining outside the furnace, continuous casting, heating, controlled rolling, controlled cooling after rolling and air cooling in a cooling bed; the heating temperature is 1150-1240 ℃, the soaking temperature is 1100-1180 ℃, the initial rolling temperature is 1000-1050 ℃, the final rolling temperature is 970-1030 ℃, the controlled cooling pressure is 0.4-0.8MPa, the temperature of the upper cooling bed of the deformed steel bar is 850-920 ℃, and the tissue transformation time is 370-560 s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011426674.XA CN112522627A (en) | 2020-12-09 | 2020-12-09 | 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and production process thereof |
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| CN202011426674.XA CN112522627A (en) | 2020-12-09 | 2020-12-09 | 600 MPa-grade high-strength hot-rolled ribbed anti-seismic corrosion-resistant reinforcing steel bar and production process thereof |
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| CN112522627A true CN112522627A (en) | 2021-03-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113481440A (en) * | 2021-09-08 | 2021-10-08 | 北京科技大学 | Corrosion-resistant and anti-seismic steel, steel bar and preparation method thereof |
| CN114293093A (en) * | 2021-11-17 | 2022-04-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 600 MPa-grade vanadium-titanium micro-alloying hot-rolled steel bar and production method thereof |
| CN115449711A (en) * | 2022-09-13 | 2022-12-09 | 佛冈达味特钢有限公司 | Corrosion-resistant hot-rolled steel bar and preparation method thereof |
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| JP2006089785A (en) * | 2004-09-22 | 2006-04-06 | Jfe Bars & Shapes Corp | High-strength steel with excellent toughness for stabilizer, and method for manufacturing stabilizer |
| CN106282780A (en) * | 2016-09-29 | 2017-01-04 | 马钢(集团)控股有限公司 | A kind of 630MPa level high-strength hot-rolled steel bar steel and preparation method thereof |
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- 2020-12-09 CN CN202011426674.XA patent/CN112522627A/en active Pending
Patent Citations (2)
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| JP2006089785A (en) * | 2004-09-22 | 2006-04-06 | Jfe Bars & Shapes Corp | High-strength steel with excellent toughness for stabilizer, and method for manufacturing stabilizer |
| CN106282780A (en) * | 2016-09-29 | 2017-01-04 | 马钢(集团)控股有限公司 | A kind of 630MPa level high-strength hot-rolled steel bar steel and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113481440A (en) * | 2021-09-08 | 2021-10-08 | 北京科技大学 | Corrosion-resistant and anti-seismic steel, steel bar and preparation method thereof |
| CN113481440B (en) * | 2021-09-08 | 2021-11-30 | 北京科技大学 | Corrosion-resistant and anti-seismic steel, steel bar and preparation method thereof |
| CN114293093A (en) * | 2021-11-17 | 2022-04-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 600 MPa-grade vanadium-titanium micro-alloying hot-rolled steel bar and production method thereof |
| CN115449711A (en) * | 2022-09-13 | 2022-12-09 | 佛冈达味特钢有限公司 | Corrosion-resistant hot-rolled steel bar and preparation method thereof |
| CN115449711B (en) * | 2022-09-13 | 2023-05-09 | 佛冈达味特钢有限公司 | Corrosion-resistant hot-rolled steel bar and preparation method thereof |
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