CN103388064A - Manufacturing method for high-strength steel bar - Google Patents
Manufacturing method for high-strength steel bar Download PDFInfo
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- CN103388064A CN103388064A CN2013103614443A CN201310361444A CN103388064A CN 103388064 A CN103388064 A CN 103388064A CN 2013103614443 A CN2013103614443 A CN 2013103614443A CN 201310361444 A CN201310361444 A CN 201310361444A CN 103388064 A CN103388064 A CN 103388064A
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Abstract
The invention discloses a manufacturing method for a high-strength steel bar and aims to provide a manufacturing method of a steel bar with good toughness and high strength. The technical key points are as follows: the manufacturing method for the high-strength steel bar comprises the following steps of: (1) directly continuously casting refined molten steel into a square blank; (2) directly hotly conveying and rolling the square blank in the step (2), wherein an initial rolling temperature is 950 DEG C-1020 DEG C and a final rolling temperature is 720 DEG C-800 DEG C; (3) carrying out multiple length shearing, and cooling the square blank to a room temperature by a cooling bed, and then carrying out fixed length shearing; and (4) detecting a finished product, and packaging and storing. The manufacturing method disclosed by the invention belongs to the field of steel manufacturing.
Description
Technical field
The invention discloses a kind of manufacture method of reinforcing bar, specifically, is a kind of manufacture method of high strength cast iron, belongs to steel and makes field.
Background technology
Along with the fast development of the industry of building, the building iron and steel has become the kind of steel product consumption maximum.Accounted at present more than 20% of China's steel ultimate production.Along with appearance high-rise, the long span building structure, not only require reinforcing bar to have higher intensity, but also have good toughness, meet the property of shockproof requirements.And China's building iron 80% is all HRB335 at present, the reinforcing bar of the HRB400 trade mark, and these intensity are low and use the density of arranging large, and the resource serious waste, be unfavorable for social sustainable development.
In addition, at present in the reinforcing bar production process, steel billet and reinforcing bar rolling are that segmentation is carried out, steel billet is made with steel by steel mill, reinforcing bar rolling factory arrives rolling temperature with heating steel billet again, again carry out reinforcing bar steel rolling, need in rolling process by " high temperature-cooling-tempering " so larger energy and the heat of needs consumption, the production cycle is longer.
Summary of the invention,
, for above-mentioned deficiency, the object of the present invention is to provide the manufacture method that a kind of energy consumption is lower, with short production cycle, can process the reinforcing bar that toughness is good, intensity is higher.
For solving the problems of the technologies described above, technical scheme provided by the invention is such: the manufacture method of this high strength cast iron comprises the steps: successively
1) the direct continuous casting of the molten steel after refining is become square billet;
2) send rolling with the square billet direct heat in step 1), open and prick 950～1020 ℃ of temperature, whole Zha Wendu is 720～800 ℃;
3) the cooling bed room temperature that is cooled to after the multiple length cutting, then cutting to length;
4) finished product detection, the packing warehouse-in.
The manufacture method of above-mentioned high strength cast iron, described molten steel comprises the composition of following mass percent: C0.20～0.25%, Mn1.20～1.50%, Si0.45～0.60%, V0.05～0.12%, surplus is Fe.
Further, the manufacture method of above-mentioned high strength cast iron, described square billet specification is for being 150mm * 150mm * 11-12m side's bar steel billet.
Further, the manufacture method of above-mentioned high strength cast iron, described reinforcing bar detects and adopts omnipotent detector test.
compared with prior art, technical scheme provided by the invention, with the direct continuous casting and rolling of molten steel, do not need to reheat, the energy and heat exhaustion have been saved, shortened the production cycle, improved production efficiency, reduced simultaneously the alloy usage quantity of producing high strength cast iron, improved the over-all properties of reinforcing bar, the reinforcing bar of identical chemical composition is rolled and is produced high strength by controlling cold control, the iron and steel of high tenacity, yield strength has improved 50-80MPa, tensile strength 40-70MPa, yield strength is greater than 630MPa, tensile strength is greater than 810MPa, unit elongation is greater than 17%, minimizing is at the steel using amount 20%-40% of building trade same function and equal floor area of building, energy-saving and emission-reduction, economic benefit and the social benefit of enterprise have been improved.
Embodiment
Below in conjunction with embodiment; claim of the present invention is described in further detail; but become not any limitation of the invention, the modification of anyone makes in the claims in the present invention scope limited number of time, still at claim protection domain of the present invention.
The manufacture method of high strength cast iron provided by the invention, comprise the steps: successively
1) the direct continuous casting of the molten steel after refining is become 150mm * 150mm * 11-12m side's bar steel billet;
Wherein: described molten steel comprises the composition of following mass percent: C0.20～0.25%, Mn1.20～1.50%, and Si0.45～0.60%, V0.05～0.12%, surplus is Fe;
2) send rolling with the square bar steel billet direct heat in step 1), 950～1020 ℃ of start rolling temperatures, finishing temperature is 720～800 ℃;
A plurality of infrared temperature sensors that distribute along the mill milling throughput direction are adopted in the control of rolling temperature, temperature data is inputted the PLC controller, controlling by the PLC controller the cold head that sprays that is arranged on the reinforcing bar top sprays water to reinforcing bar cooling (or local cooling), reach the purpose of controlling the per pass rolling temperature, realize the precision control of rolling temperature, guarantee the mechanical property of reinforcing bar.
3) the cooling bed room temperature that is cooled to after the multiple length cutting, then cutting to length;
4) finished product adopts omnipotent detector to survey detection, the packing warehouse-in.
The manufacture method of high strength cast iron provided by the invention, saved the energy and heat exhaustion, shortened the production cycle, improved production efficiency, reduce simultaneously the alloy usage quantity of producing high strength cast iron, improved the over-all properties of reinforcing bar, improved economic benefit and the social benefit of enterprise.
Embodiment 1
Billet bloom size 150mm * 150mm * 11-12m, utilize continuous thread steel milling train to process the Deformed Steel Bars of Ф 12, rolling process Wei Shiliu road; Finish rolling K1-K6, in roll K7-K10, roughing K11-K16; Start rolling temperature is controlled at 950～1020 ℃, and finishing temperature is controlled at 720～800 ℃, the finished product reinforcing bar of rolling be all three.
Embodiment 2
Billet bloom size 150mm * 150mm * 11-12m, utilize continuous thread steel milling train to process the Deformed Steel Bars of Ф 16, rolling process Wei Shiliu road; Finish rolling K1-K6, in roll K7-K10, roughing K11-K16; Start rolling temperature is controlled at 950～1020 ℃, and finishing temperature is controlled at 720～800 ℃, the finished product reinforcing bar of rolling be all two.
Embodiment 3
Billet bloom size 150mm * 150mm * 11-12m, utilize continuous thread steel milling train to process the Deformed Steel Bars of Ф 18, rolling process Wei Shiliu road; Finish rolling K1-K6, in roll K7-K10, roughing K11-K16; Start rolling temperature is controlled at 950～1020 ℃, and finishing temperature is controlled at 720～800 ℃, the finished product reinforcing bar of rolling be all two.
Embodiment 4
Billet bloom size 150mm * 150mm * 11-12m, utilize continuous thread steel milling train to process the Deformed Steel Bars of Ф 22, rolling process Wei Shiliu road; Finish rolling K1-K6, in roll K7-K10, roughing K11-K16; Start rolling temperature is controlled at 950～1020 ℃, and finishing temperature is controlled at 720～800 ℃, the finished product reinforcing bar of rolling be all one.
, for advantage of the present invention better is described, below provide the mechanical property of each Deformed Steel Bars in embodiment 1 to 4.
| Steel bar mechanics performance | Yield strength | Tensile strength | Unit elongation |
| Embodiment 1 | 680 | 845 | 19.5 |
| Embodiment 2 | 675 | 850 | 19.0 |
| Embodiment 3 | 640 | 815 | 19.0 |
| Embodiment 4 | 630 | 815 | 19.5 |
Claims (4)
1. the manufacture method of a high strength cast iron, is characterized in that, comprises the steps: successively
1) the direct continuous casting of the molten steel after refining is become square billet;
2) send rolling with the square billet direct heat in step 1), 950～1020 ℃ of start rolling temperatures, finishing temperature is 720～800 ℃;
3) the cooling bed room temperature that is cooled to after the multiple length cutting, then cutting to length;
4) finished product detection, the packing warehouse-in.
2. the manufacture method of high strength cast iron according to claim 1, is characterized in that, described molten steel comprises the composition of following mass percent: C0.20～0.25%, Mn1.20～1.50%, and Si0.45～0.60%, V0.05～0.12%, surplus is Fe.
3. the manufacture method of high strength cast iron according to claim 1, is characterized in that, described square billet specification is 150mm * 150mm * 11-12m side's bar steel billet.
4. the manufacture method of high strength cast iron according to claim 1, is characterized in that, described reinforcing bar detects and adopts omnipotent detector test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103614443A CN103388064A (en) | 2013-08-19 | 2013-08-19 | Manufacturing method for high-strength steel bar |
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| CN2013103614443A CN103388064A (en) | 2013-08-19 | 2013-08-19 | Manufacturing method for high-strength steel bar |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745968A (en) * | 2014-12-24 | 2015-07-01 | 福建三宝特钢有限公司 | HRB500E seismic steel bar and preparation method thereof |
| CN108941199A (en) * | 2018-06-27 | 2018-12-07 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar casting system and reinforcing bar casting-rolling method |
| CN108977729A (en) * | 2018-07-10 | 2018-12-11 | 陕钢集团汉中钢铁有限责任公司 | A kind of high strength cast iron and its production method |
| CN109092895A (en) * | 2018-06-27 | 2018-12-28 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar continuous casting and rolling system and reinforcing bar continuous casting and tandem rolling production method |
| CN116984373A (en) * | 2023-09-27 | 2023-11-03 | 陕西钢铁集团有限公司 | Economical green production method of high-strength shock-resistant deformed steel bar |
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| CN102732787A (en) * | 2012-07-20 | 2012-10-17 | 江苏省沙钢钢铁研究院有限公司 | 600MPa level quake-proof twisted steel and manufacturing method thereof |
| CN102851605A (en) * | 2012-09-29 | 2013-01-02 | 莱芜钢铁集团有限公司 | HRB600E reinforcement steel bar and production method thereof |
| CN102864376A (en) * | 2012-09-13 | 2013-01-09 | 莱芜钢铁集团有限公司 | High-strength full-thread equal-strong resin bolting reinforcing bar and production method thereof |
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2013
- 2013-08-19 CN CN2013103614443A patent/CN103388064A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102732787A (en) * | 2012-07-20 | 2012-10-17 | 江苏省沙钢钢铁研究院有限公司 | 600MPa level quake-proof twisted steel and manufacturing method thereof |
| CN102864376A (en) * | 2012-09-13 | 2013-01-09 | 莱芜钢铁集团有限公司 | High-strength full-thread equal-strong resin bolting reinforcing bar and production method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745968A (en) * | 2014-12-24 | 2015-07-01 | 福建三宝特钢有限公司 | HRB500E seismic steel bar and preparation method thereof |
| CN104745968B (en) * | 2014-12-24 | 2017-02-01 | 福建三宝特钢有限公司 | HRB500E seismic steel bar and preparation method thereof |
| CN108941199A (en) * | 2018-06-27 | 2018-12-07 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar casting system and reinforcing bar casting-rolling method |
| CN109092895A (en) * | 2018-06-27 | 2018-12-28 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar continuous casting and rolling system and reinforcing bar continuous casting and tandem rolling production method |
| CN108977729A (en) * | 2018-07-10 | 2018-12-11 | 陕钢集团汉中钢铁有限责任公司 | A kind of high strength cast iron and its production method |
| CN116984373A (en) * | 2023-09-27 | 2023-11-03 | 陕西钢铁集团有限公司 | Economical green production method of high-strength shock-resistant deformed steel bar |
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Application publication date: 20131113 |