CN101921954A - Earthquake-resistant hot rolled ribbed steel bar and production process thereof - Google Patents
Earthquake-resistant hot rolled ribbed steel bar and production process thereof Download PDFInfo
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- CN101921954A CN101921954A CN 201010237699 CN201010237699A CN101921954A CN 101921954 A CN101921954 A CN 101921954A CN 201010237699 CN201010237699 CN 201010237699 CN 201010237699 A CN201010237699 A CN 201010237699A CN 101921954 A CN101921954 A CN 101921954A
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Abstract
The invention relates to an earthquake-resistant hot rolled ribbed steel bar and a production process thereof. The invention is characterized in that the steel bar comprises the following chemical components by weight percent: 0.18-0.23% of C, 0.30-0.55% of Si, 1.30-1.55% of Mn, 0.03-0.05% of Nb, no more than 0.040% of P, no more than 0.040% of S, no more than 0.54% of Ceq and the balance of Fe. The production process of the steel bar comprises the following steps: smelting steel scraps in an electric furnace, and then, refining and adjusting to control the chemical components; carrying out continuous casting by a continuous casting machine, and then, heating in a heating furnace; rolling by a roughing mill group, an intermediate mill group and a finishing mill group; and finally, cooling by a walking beam cooler to obtain the steel bar. The earthquake-resistant hot rolled ribbed steel bar of the invention has a longer stage of uniform deformation after being bent and can absorb more earthquake energy, thereby improving the earthquake-resistant performance. The production process of the invention is simple and reasonable.
Description
Technical field
The present invention relates to a kind of earthquake-resistant hot rolled ribbed steel bar and production technique thereof.
Background technology
Along with developing rapidly of building industry, industrial structures such as Highrise buildings are more and more higher to the reinforcing bar demands for bearing capacity, and anti-seismic problem has also caused common attention.
Summary of the invention
The object of the present invention is to provide a kind of earthquake-resistant hot rolled ribbed steel bar and production technique thereof, this earthquake-resistant hot rolled ribbed steel bar not only intensity is good, also has the ability of good deformability and absorption seismic energy.
Earthquake-resistant hot rolled ribbed steel bar of the present invention, it is characterized in that: the composition of this reinforcing bar includes Fe, C, Si, Mn, Nb, P, S, Ceq, wherein the mass percent of chemical ingredients is: C is 0.18～0.23, Si is 0.30～0.55, Mn is 1.30～1.55, Nb is 0.03～0.05, P for≤0.040, S for≤0.040, Ceq is≤0.54, all the other are Fe.
Earthquake-resistant hot rolled ribbed steel bar production technique of the present invention, it is characterized in that: the composition of this reinforcing bar includes Fe, C, Si, Mn, Nb, P, S, Ceq, wherein the mass percent of chemical ingredients is: C is 0.18～0.23, Si is 0.30～0.55, Mn is 1.30～1.55, Nb is 0.03～0.05, P is≤0.040, S is≤0.040, Ceq is≤0.54, all the other for the production technique of this reinforcing bar of Fe are: carry out the refining adjustment after the smelting of steel scrap electric furnace to control its above-mentioned chemical ingredients, behind continuous caster, carry out the process furnace heating then, milling train group and finishing train are rolled in the roughing unit again, carry out the walking beam cooler cooling at last and finish.
Earthquake-resistant hot rolled ribbed steel bar of the present invention is by its composition, at first realized when guaranteeing that reinforcing bar has certain intensity, improve its plasticity, make its intensity and plasticity reach best fit, has higher unit elongation value, and can when macroseism, absorb more seismic energy, secondly, it has high strong flexor ratio and uniform yield strength, and strong flexor ratio is high more, steel just have more plasticity storage, in addition, there is the long homogeneous deformation stage after the surrender, can absorbs more seismic energy, thereby the raising anti-seismic performance, its production technique is simple, reasonable.
Embodiment
The composition of earthquake-resistant hot rolled ribbed steel bar of the present invention includes Fe, C, Si, Mn, Nb, P, S, Ceq, wherein the mass percent of chemical ingredients is: C is 0.18～0.23, Si is 0.30～0.55, Mn is 1.30～1.55, Nb is 0.03～0.05, P for≤0.040, S for≤0.040, Ceq is≤0.54, all the other are Fe.
The production technique of earthquake-resistant hot rolled ribbed steel bar of the present invention is: carry out the refining adjustment after the smelting of steel scrap electric furnace to control its above-mentioned chemical ingredients, behind continuous caster, carry out the process furnace heating then, milling train group and finishing train are rolled in the roughing unit again, carry out the walking beam cooler cooling at last and finish.
The pulling rate of this reinforcing bar steel rolling in continuous caster is controlled between 2.5～3.2m/min.
The heating of the process furnace that carries out before this steel rolling, Nb micro-alloyed steel Heating temperature is higher 70～90 ℃ than V micro-alloyed steel, and opens and prick temperature and be controlled at 1150-1200 ℃, and temperature fluctuation is between 30-50 ℃.
This roughing operation adopts 17 roads.
This reinforced steel bar strength index and plasticity index that production makes are as follows:
| Yield strength Rel/MPa | Tensile strength Rm/MPa | Unit elongation/% |
| (430-445)/440 | (615-630)/620 | (18.0-20.0)/19.0 |
Its antidetonation index:
To strong flexor ratio, actual measurement yield strength and standard yield strength when the antidetonation indexs such as middle elongation under the maximum stress carry out statistical study, see the following form:
| Strong flexor ratio Rm/Rel | Rel actual measurement/Rel standard | Percentage of total elongation Agt/% under the maximum stress |
| (1.34-1.39)/1.36 | 1.07-1.16/1.11 | 15-17/16 |
Strong flexor ratio satisfies anti-seismic steel bar and equals 1.25 requirement greatly, the actual measurement yield strength of reinforcing bar and standard yield strength ratio satisfy anti-seismic steel bar far away and equal 1.30 requirement for a short time, percentage of total elongation under the maximum, force all is far longer than GB and requires Agt/% to equal 9% regulation greatly, so earthquake-resistant hot rolled ribbed steel bar of the present invention has been realized when guaranteeing that reinforcing bar has certain intensity, improve its plasticity, make its intensity and plasticity reach best fit, has higher unit elongation value, and can when macroseism, absorb more seismic energy, secondly, it has high strong flexor ratio and uniform yield strength, and strong flexor ratio is high more, and steel just have more plasticity storage, in addition, the long homogeneous deformation stage is arranged after the surrender, can absorb more seismic energy, thereby improve anti-seismic performance.
Claims (5)
1. earthquake-resistant hot rolled ribbed steel bar, it is characterized in that: the composition of this reinforcing bar includes Fe, C, Si, Mn, Nb, P, S, Ceq, wherein the mass percent of chemical ingredients is: C is 0.18～0.23, Si is 0.30～0.55, Mn is 1.30～1.55, Nb is 0.03～0.05, P for≤0.040, S for≤0.040, Ceq is≤0.54, all the other are Fe.
2. the production technique of an earthquake-resistant hot rolled ribbed steel bar, it is characterized in that: the composition of this reinforcing bar includes Fe, C, Si, Mn, Nb, P, S, Ceq, wherein the mass percent of chemical ingredients is: C is 0.18～0.23, Si is 0.30～0.55, Mn is 1.30～1.55, Nb is 0.03～0.05, P is≤0.040, S is≤0.040, Ceq is≤0.54, all the other are Fe, the production technique of this reinforcing bar is: carry out the refining adjustment after the smelting of steel scrap electric furnace to control its above-mentioned chemical ingredients, behind continuous caster, carry out the process furnace heating then, milling train group and finishing train are rolled in the roughing unit again, carry out the walking beam cooler cooling at last and finish.
3. the production technique of earthquake-resistant hot rolled ribbed steel bar according to claim 2, it is characterized in that: the pulling rate of described reinforcing bar steel rolling in continuous caster is controlled between 2.5～3.2m/min.
4. the production technique of earthquake-resistant hot rolled ribbed steel bar according to claim 2, it is characterized in that: the process furnace heating of carrying out before the steel rolling, Nb micro-alloyed steel Heating temperature is higher 70～90 ℃ than V micro-alloyed steel, and opens and prick temperature and be controlled at 1150-1200 ℃, and temperature fluctuation is between 30-50 ℃.
5. the production technique of earthquake-resistant hot rolled ribbed steel bar according to claim 2, it is characterized in that: the roughing operation adopts 17 roads.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010237699 CN101921954A (en) | 2010-07-27 | 2010-07-27 | Earthquake-resistant hot rolled ribbed steel bar and production process thereof |
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| CN 201010237699 CN101921954A (en) | 2010-07-27 | 2010-07-27 | Earthquake-resistant hot rolled ribbed steel bar and production process thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534407A (en) * | 2012-01-13 | 2012-07-04 | 首钢水城钢铁（集团）有限责任公司 | Production method for HRB600 hot-rolled ribbed steel bars |
| CN112080707A (en) * | 2020-08-07 | 2020-12-15 | 江苏联峰实业有限公司 | Low-niobium deformed steel bar and production method thereof |
| CN113528938A (en) * | 2021-06-10 | 2021-10-22 | 广西柳钢华创科技研发有限公司 | HRB600E normal speed hot rolled ribbed steel bar with yield ratio more than 1.26 and production method thereof |
| CN114836674A (en) * | 2022-05-07 | 2022-08-02 | 山东莱钢永锋钢铁有限公司 | Production method of hot-rolled ribbed steel bar HRB500E |
| CN118237394A (en) * | 2024-03-28 | 2024-06-25 | 安徽工业大学 | Production process of cold-rolled anti-seismic steel bar |
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| CN1260404A (en) * | 1999-08-05 | 2000-07-19 | 江苏苏钢集团有限公司 | Low-alloy coiled deformed steel bar and manufacturing process thereof |
| CN1900325A (en) * | 2006-07-04 | 2007-01-24 | 水城钢铁（集团）有限责任公司 | Composite reinforced producing method for high strength steel |
| CN101323929A (en) * | 2007-06-14 | 2008-12-17 | 舞阳钢铁有限责任公司 | High strength steel plate for big thickness tall building structure and production method thereof |
| CN101748333A (en) * | 2009-12-25 | 2010-06-23 | 舞阳钢铁有限责任公司 | Low-carbon-equivalent high-strength wear-resistant steel plate and production method thereof |
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Patent Citations (4)
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| CN1260404A (en) * | 1999-08-05 | 2000-07-19 | 江苏苏钢集团有限公司 | Low-alloy coiled deformed steel bar and manufacturing process thereof |
| CN1900325A (en) * | 2006-07-04 | 2007-01-24 | 水城钢铁（集团）有限责任公司 | Composite reinforced producing method for high strength steel |
| CN101323929A (en) * | 2007-06-14 | 2008-12-17 | 舞阳钢铁有限责任公司 | High strength steel plate for big thickness tall building structure and production method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534407A (en) * | 2012-01-13 | 2012-07-04 | 首钢水城钢铁（集团）有限责任公司 | Production method for HRB600 hot-rolled ribbed steel bars |
| CN102534407B (en) * | 2012-01-13 | 2013-08-07 | 首钢水城钢铁（集团）有限责任公司 | Production method for HRB600 hot-rolled ribbed steel bars |
| CN112080707A (en) * | 2020-08-07 | 2020-12-15 | 江苏联峰实业有限公司 | Low-niobium deformed steel bar and production method thereof |
| CN113528938A (en) * | 2021-06-10 | 2021-10-22 | 广西柳钢华创科技研发有限公司 | HRB600E normal speed hot rolled ribbed steel bar with yield ratio more than 1.26 and production method thereof |
| CN113528938B (en) * | 2021-06-10 | 2022-04-29 | 广西柳钢华创科技研发有限公司 | HRB600E normal speed hot rolled ribbed steel bar with yield ratio more than 1.26 and production method thereof |
| CN114836674A (en) * | 2022-05-07 | 2022-08-02 | 山东莱钢永锋钢铁有限公司 | Production method of hot-rolled ribbed steel bar HRB500E |
| CN118237394A (en) * | 2024-03-28 | 2024-06-25 | 安徽工业大学 | Production process of cold-rolled anti-seismic steel bar |
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Application publication date: 20101222 |