CN106636917A - HRB600E vanadium-containing high-strength hot-rolled earthquake-resistant reinforced bar and production method thereof - Google Patents
HRB600E vanadium-containing high-strength hot-rolled earthquake-resistant reinforced bar and production method thereof Download PDFInfo
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- CN106636917A CN106636917A CN201611104442.6A CN201611104442A CN106636917A CN 106636917 A CN106636917 A CN 106636917A CN 201611104442 A CN201611104442 A CN 201611104442A CN 106636917 A CN106636917 A CN 106636917A
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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
- 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
- C22C38/02—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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Abstract
The invention discloses an HRB600E vanadium-containing high-strength hot-rolled earthquake-resistant reinforced bar and a production method thereof. The reinforced bar comprises the following chemical components in percentage by weight: 0.23-0.30% of C, 0.5-0.8% of Si, 1.20-1.60% of Mn, 0.15-0.20% of V, no more than 0.035% of P, no more than 0.030% of S, 0.015-0.025% of N and the balance of Fe and inevitable impurities. The production method comprises the following steps: performing converter or electric furnace smelting, performing external refining, performing continuous casting, heating a casting blank, rolling and performing air cooling on a cooling bed. According to the invention, the V and N contents in steel are controlled, thereby promoting formation and precipitation of V (C, N) fine particles; steel making and steel rolling process parameters are strictly controlled, thereby obviously enhancing the strength of the reinforced bar and having certain hydrogen corrosion resistance; indicators of the reinforced bar meets the requirements of an earthquake-resistant reinforced bar; and the reinforced bar has the practical meanings of energy saving, emission reduction, high safety and environment friendliness.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of HRB600E is containing the high-strength hot-rolled anti-seismic steel bar of vanadium and life
Product method.
Background technology
With developing rapidly for building industry, the engineering structure such as Municipal engineering and skyscraper is wanted to reinforcement property
More and more higher is sought, the security of building structure, antidetonation sex chromosome mosaicism cause common concern, and improve building safety and shock resistance
Key be improve reinforcing bar intensity and combination property.Advocate energetically under energy-saving and emission-reduction, the background of environmental protection in country, as
The building industry of resource consumption rich and influential family, regular tenacity reinforcing bar cannot meet the need of development as the situation of construction(al)steel main material
Will, develop low-cost and high-performance reinforcing bar and study the problem that its engineer applied has become in the urgent need to address.Therefore, develop a kind of
High and good combination property the reinforcing bar of intensity, is inexorable trend that following reinforced concrete structure develops in building engineering field.It is many
Nian Lai, China is popularization and application high tensile reinforcement, takes specification revision, carries out the multinomial measures such as demonstration project, but high-strength steel
Muscle still suffers from many problems in practical engineering application.At present, compared with developed countries, reinforced steel bar strength used by China's building trade
Universal low 1～2 grade.Therefore, in order to improve the integral level of current building industry, the office that China's construction(al)steel falls behind is reversed
Face, promote and the use of high tensile reinforcement is the inexorable trend of China's architectural development.
Compared with HRB335, HRB400, HRB500 level reinforcing bar being currently mainly used, can Saving steel amount 73.3%,
44.4% and 19.5%.Simultaneously popularization and application high tensile reinforcement can also obtain huge indirect economic effect.Materials with High Strength should
With, it is possible to resolve fat beams and columns problem in building structure, can not only so increase building usable floor area, it is also possible to make structure design more
Plus flexibly, improve building and use function.Additionally, construction quality can be improved using Materials with High Strength, extend service life, reduce dimension
Shield cost of use.Therefore, high and good combination property the high-strength quake-proof reinforcing steel bar of intensity is researched and developed, is the following steel of iron and steel enterprise's reply
The inexorable trend that tendon concrete structure develops in building engineering field.
The content of the invention
The present invention provides a kind of HRB600E containing the high-strength hot-rolled anti-seismic steel bar of vanadium and production method, the HRB600E for being produced
The features such as reinforcing bar has high intensity, plasticity and toughness and good anti-seismic performance, combination property is stable, realizes the purpose of energy-conserving and environment-protective.
The technical solution used in the present invention is：A kind of HRB600E high-strength hot-rolled anti-seismic steel bars containing vanadium, the reinforcing bar
Study point and weight percentage is as follows：C：0.23～0.30%, Si：0.5～0.8%, Mn：1.20～1.60%, V：0.15～
0.20%, P≤0.035%, S≤0.030%, N：0.015～0.025%, remaining is Fe and inevitable impurity.
630～720MPa of reinforcement yielding intensity of the present invention, 790～910MPa of tensile strength.
Reinforcing bar strong flexor ratio >=1.25 of the present invention, elongation after fracture A >=15%, maximum elongation rate Agt >=10%,
The present invention also provides a kind of production methods of above-mentioned HRB600E containing the high-strength hot-rolled anti-seismic steel bar of vanadium, the production method
Including converter or electric furnace smelting operation, external refining operation, continuous casting working procedure, heating strand operation, rolling process and cold bed air cooling
Operation.
Converter of the present invention or electric furnace smelting operation, terminal Ingredients Weight percentage composition is controlled to C >=0.08%, and P≤
0.020%, 1650～1680 DEG C of outlet temperature.
External refining operation of the present invention, refining ensures soft argon blowing time >=8min after terminating, refining lifting temperature is
1570～1590 DEG C.
Continuous casting working procedure of the present invention, is cast using continuous casting whole process protection, and middle bag stability contorting is at 1520～1540 DEG C；Draw
Speed is 1.7～1.9m/min；Water Rate for Secondary Cooling Water is 0.9～1.3L/kg steel.
Heating strand operation of the present invention, heating-up temperature is 1050 ± 50 DEG C.
Rolling process of the present invention, start rolling temperature is 1020～1080 DEG C, and finishing temperature is 950～1000 DEG C.
Converter of the present invention or electric furnace smelting operation, tapping process adds ferrosilicon, nitrided ferromanganese, silicomangan and vanadium nitrogen
Alloy carries out silicon, manganese, vanadium alloying；The external refining operation, refining terminal is fed calcium iron wire and carries out Calcium treatment.
Present invention also offers above-mentioned HRB600E containing the high-strength hot-rolled anti-seismic steel bar of vanadium production method, including converter or
Electric furnace smelting, external refining, continuous casting, heating strand, rolling and cold bed air cooling.
In the converter or electric furnace smelting step, terminal Ingredients Weight percentage composition is controlled to C：>=0.08%, P≤
0.020%, 1650～1680 DEG C of outlet temperature, tapping process adds ferrosilicon, nitrided ferromanganese, silicomangan and VN alloy to carry out
Silicon, manganese, vanadium alloying.
In external refining step, refining terminal is fed calcium iron wire and carries out Calcium treatment, refining ensure after terminating soft argon blowing time >=
8min, refining lifting temperature is 1570～1590 DEG C.
In continuous casting step, cast using continuous casting whole process protection, middle bag stability contorting is at 1520～1540 DEG C；Pulling rate is 1.7
～1.9m/min；Water Rate for Secondary Cooling Water is 0.9～1.3L/kg steel.
In heating strand step, heating-up temperature is 1050 ± 50 DEG C.
In milling step, start rolling temperature is 1020～1080 DEG C, and finishing temperature is 950～1000 DEG C.
It is using the beneficial effect produced by above-mentioned technical proposal：
, by the strict control to steel-making and steel rolling process parameter, steel grade chemical composition stability, fluctuation range is less, together for the present invention
When, V, the N content in adding nitrided ferromanganese, VN alloy to carry out alloying so as to control steel in steel promotes V（C,N）Carefully
Short grained formation and precipitation, improve utilization rate of the vanadium in steel, and Austenite Grain Growth is prevented in the hot rolling, tool
There are stronger precipitation precipitation strength and refined crystalline strengthening effect, significantly improve the intensity of HRB600E antidetonation spirals and have
Certain hydrogen attack resistance.
HRB600E of the present invention high-strength hot-rolled anti-seismic steel bars containing vanadium have intensity high, plasticity and toughness and anti-seismic performance good etc.
Feature, wherein, yield strength Rel is 630～720MPa, and tensile strength Rm is 790～910MPa, and strong flexor ratio >=1.25 are had no progeny
Elongation A >=15%, maximum elongation rate Agt >=10% has reached anti-seismic steel bar requirement.The present invention HRB600E anti-seismic steel bars with
400MPa, 500MPa level anti-seismic steel bar is compared, and because intensity is improved, can save steel, and the row's of reduction muscle density reduces being built into
This, increases the intensity of structure, safety reservation is increased, with energy-saving and emission-reduction, the realistic meaning of safety and environmental protection.
Specific embodiment
The present invention is described further with reference to embodiment；
HRB600E is containing the technological process of the high-strength hot-rolled anti-seismic steel bar of vanadium in embodiment 1-7：Converter or electric furnace smelting → stove
Outer refining → continuous casting → heating strand → rolling → cold bed air cooling, concrete operation step is：
（1）Smelt：Decarburization dephosphorization smelting, the percentage by weight control of aim carbon will be carried out together with molten iron and steel scrap, slag material etc.
0.08～0.14%, weight percentage P≤0.020% of phosphorus, outlet temperature is controlled at 1640～1680 DEG C, in tapping process
Nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy is added to carry out manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And more than soft blow argon 8min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1570～1590 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, the casting of continuous casting whole process protection, tundish temperature control 1520～
1540 DEG C, pulling rate is 1.7～1.9m/min, and Water Rate for Secondary Cooling Water is 0.9～1.3L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1050 ± 50 DEG C heating and thermal insulation, control start rolling temperature
At 1020～1080 DEG C, finishing temperature is at 950～1000 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
Embodiment 1
HRB600E is shown in Table 1 containing the high-strength hot-rolled anti-seismic steel bar chemical composition of vanadium and percentage composition, and performance parameter is shown in Table 2.
Technological process is as follows：
（1）Smelt：Decarburization dephosphorization smelting, aim carbon 0.10%, terminal phosphorus will be carried out together with molten iron and steel scrap, slag material etc.
0.014%, outlet temperature is controlled at 1650 DEG C, adds nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy to enter in tapping process
Row manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And soft blow argon 10min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1580 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, continuous casting whole process protection casting, tundish temperature is controlled at 1530 DEG C,
Pulling rate is 1.9m/min, and Water Rate for Secondary Cooling Water is 1.1L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1050 DEG C heating and thermal insulation, control start rolling temperature exist
1020 DEG C, finishing temperature is at 950 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
Embodiment 2
HRB600E is shown in Table 1 containing the high-strength hot-rolled anti-seismic steel bar chemical composition of vanadium and percentage composition, and performance parameter is shown in Table 2.
Technological process is as follows：
（1）Smelt：Decarburization dephosphorization smelting, aim carbon 0.08%, terminal phosphorus will be carried out together with molten iron and steel scrap, slag material etc.0.018%, outlet temperature is controlled at 1680 DEG C, adds nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy to enter in tapping process
Row manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And soft blow argon 11min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1570 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, continuous casting whole process protection casting, tundish temperature is controlled at 1525 DEG C,
Pulling rate is 1.8m/min, and Water Rate for Secondary Cooling Water is 1.0L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1000 DEG C heating and thermal insulation, control start rolling temperature exist
1030 DEG C, finishing temperature is at 980 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
Embodiment 3
HRB600E is shown in Table 1 containing the high-strength hot-rolled anti-seismic steel bar chemical composition of vanadium and percentage composition, and performance parameter is shown in Table 2.
Technological process is as follows：
（1）Smelt：Decarburization dephosphorization smelting, aim carbon 0.14%, terminal phosphorus will be carried out together with molten iron and steel scrap, slag material etc.
0.015%, outlet temperature is controlled at 1670 DEG C, adds nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy to enter in tapping process
Row manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And soft blow argon 9min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1590 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, continuous casting whole process protection casting, tundish temperature is controlled at 1535 DEG C,
Pulling rate is 1.9m/min, and Water Rate for Secondary Cooling Water is 0.9L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1100 DEG C heating and thermal insulation, control start rolling temperature exist
1025 DEG C, finishing temperature is at 1000 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
Embodiment 4
HRB600E is shown in Table 1 containing the high-strength hot-rolled anti-seismic steel bar chemical composition of vanadium and percentage composition, and performance parameter is shown in Table 2.
Technological process is as follows：
（1）Smelt：Decarburization dephosphorization smelting, aim carbon 0.08%, terminal phosphorus will be carried out together with molten iron and steel scrap, slag material etc.
0.012%, outlet temperature is controlled at 1660 DEG C, adds nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy to enter in tapping process
Row manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And soft blow argon 8min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1575 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, continuous casting whole process protection casting, tundish temperature is controlled at 1540 DEG C,
Pulling rate is 1.7m/min, and Water Rate for Secondary Cooling Water is 1.3L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1080 DEG C heating and thermal insulation, control start rolling temperature exist
1045 DEG C, finishing temperature is at 990 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
Embodiment 5
HRB600E is shown in Table 1 containing the high-strength hot-rolled anti-seismic steel bar chemical composition of vanadium and percentage composition, and performance parameter is shown in Table 2.
Technological process is as follows：
（1）Smelt：Decarburization dephosphorization smelting, aim carbon 0.14%, terminal phosphorus will be carried out together with molten iron and steel scrap, slag material etc.
0.020%, outlet temperature is controlled at 1665 DEG C, adds nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy to enter in tapping process
Row manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And soft blow argon 12min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1570 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, continuous casting whole process protection casting, tundish temperature is controlled at 1528 DEG C,
Pulling rate is 1.8m/min, and Water Rate for Secondary Cooling Water is 1.2L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1030 DEG C heating and thermal insulation, control start rolling temperature exist
1040 DEG C, finishing temperature is at 960 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
Embodiment 6
HRB600E is shown in Table 1 containing the high-strength hot-rolled anti-seismic steel bar chemical composition of vanadium and percentage composition, and performance parameter is shown in Table 2.
Technological process is as follows：
（1）Smelt：Decarburization dephosphorization smelting, aim carbon 0.12%, terminal phosphorus will be carried out together with molten iron and steel scrap, slag material etc.
0.013%, outlet temperature is controlled at 1655 DEG C, adds nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy to enter in tapping process
Row manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And soft blow argon 10min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1575 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, continuous casting whole process protection casting, tundish temperature is controlled at 1520 DEG C,
Pulling rate is 1.7m/min, and Water Rate for Secondary Cooling Water is 1.0L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1090 DEG C heating and thermal insulation, control start rolling temperature exist
1080 DEG C, finishing temperature is at 965 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
Embodiment 7
HRB600E is shown in Table 1 containing the high-strength hot-rolled anti-seismic steel bar chemical composition of vanadium and percentage composition, and performance parameter is shown in Table 2.
Technological process is as follows：
（1）Smelt：Decarburization dephosphorization smelting, aim carbon 0.13%, terminal phosphorus will be carried out together with molten iron and steel scrap, slag material etc.
0.014%, outlet temperature is controlled at 1675 DEG C, adds nitrided ferromanganese, ferrosilicon, silicomangan and VN alloy to enter in tapping process
Row manganese, silicon and vanadium alloying, tapping process whole process Argon stirring.
（2）External refining：By step（1）Molten steel is delivered to LF stoves and is refined, and to liquid steel temperature, composition the control that becomes more meticulous is carried out
System, refines overall process Bottom Argon Stirring, promotes inclusion floating, refining terminal to feed calcium iron wire to molten steel and adjust field trash type,
And soft blow argon 14min, promote inclusion floating, improve steel performance；Refining lifting temperature is 1585 DEG C.
（3）Continuous casting：Step 2 is sent to into continuous casting production, continuous casting whole process protection casting, tundish temperature is controlled at 1538 DEG C,
Pulling rate is 1.9m/min, and Water Rate for Secondary Cooling Water is 1.2L/kg steel.
（4）Heating strand and rolling：By step 3 strand at a temperature of 1020 DEG C heating and thermal insulation, control start rolling temperature exist
1070 DEG C, finishing temperature is at 995 DEG C.
（5）Cold bed air cooling：By gained steel on walking beam cooler natural air cooling, carry out fixed size scissors as requested afterwards
Cut, put in storage.
The HRB600E composition of steel of embodiment 1-7 is shown in Table 1.
HRB600E composition of steel/the % of embodiment 1-7 of table 1
| Numbering | Specification | C | Si | Mn | P | S | V | N |
| Embodiment 1 | Φ18 | 0.24 | 0.55 | 1.48 | 0.017 | 0.006 | 0.156 | 0.0196 |
| Embodiment 2 | Φ22 | 0.25 | 0.60 | 1.32 | 0.023 | 0.012 | 0.158 | 0.0187 |
| Embodiment 3 | Φ25 | 0.25 | 0.66 | 1.51 | 0.019 | 0.015 | 0.164 | 0.0215 |
| Embodiment 4 | Φ28 | 0.26 | 0.76 | 1.56 | 0.015 | 0.008 | 0.178 | 0.0236 |
| Embodiment 5 | Φ32 | 0.27 | 0.72 | 1.54 | 0.024 | 0.004 | 0.188 | 0.0223 |
| Embodiment 6 | Φ18 | 0.23 | 0.50 | 1.60 | 0.035 | 0.009 | 0.200 | 0.025 |
| Embodiment 7 | Φ22 | 0.30 | 0.80 | 1.20 | 0.025 | 0.030 | 0.150 | 0.015 |
Performance detection is carried out to the HRB600E reinforcing bars of embodiment 1-7, testing result is shown in Table 2；
The HRB600E reinforcement properties of embodiment 1-7 of table 2
| Numbering | Specification | Rel/MPa | Rm/MPa | Rm/Rel | Rel/Rel0 | A/% | Agt/% |
| Embodiment 1 | Φ18 | 630 | 800 | 1.27 | 1.05 | 17 | 15 |
| Embodiment 2 | Φ22 | 655 | 825 | 1.26 | 1.09 | 19 | 13 |
| Embodiment 3 | Φ25 | 680 | 870 | 1.28 | 1.13 | 16 | 11 |
| Embodiment 4 | Φ28 | 700 | 890 | 1.27 | 1.17 | 20 | 16 |
| Embodiment 5 | Φ32 | 720 | 910 | 1.26 | 1.20 | 18 | 12.5 |
| Embodiment 6 | Φ18 | 634 | 812 | 1.28 | 1.06 | 19 | 14 |
| Embodiment 7 | Φ22 | 712 | 905 | 1.27 | 1.18 | 16 | 12 |
As shown in Table 2, HRB600E of the present invention high-strength hot-rolled anti-seismic steel bars containing vanadium have high intensity, plasticity and toughness and anti-seismic performance
The features such as good, wherein, yield strength Rel is 630～720MPa, and tensile strength Rm is 790～910MPa, strong flexor ratio >=
1.25, elongation after fracture A >=15%, maximum elongation rate Agt >=10% has reached anti-seismic steel bar requirement.
Claims (10)
1. a kind of HRB600E high-strength hot-rolled anti-seismic steel bars containing vanadium, it is characterised in that the reinforcing bar chemical composition and weight percent
Content is as follows：C：0.23～0.30%, Si：0.5～0.8%, Mn：1.20～1.60%, V：0.15～0.20%, P≤0.035%, S
≤ 0.030%, N：0.015～0.025%, remaining is Fe and inevitable impurity.
2. a kind of HRB600E according to claim 1 high-strength hot-rolled anti-seismic steel bars containing vanadium, it is characterised in that the steel
Muscle 630～720MPa of yield strength, 790～910MPa of tensile strength.
3. a kind of HRB600E according to claim 1 high-strength hot-rolled anti-seismic steel bars containing vanadium, it is characterised in that the steel
Muscle strong flexor ratio >=1.25, elongation after fracture A >=15%, maximum elongation rate Agt >=10%.
4. based on a kind of producers of the HRB600E described in claim 1-3 any one containing the high-strength hot-rolled anti-seismic steel bar of vanadium
Method, it is characterised in that the production method includes that converter or electric furnace smelting operation, external refining operation, continuous casting working procedure, strand add
Thermal technology's sequence, rolling process and cold bed air cooling operation.
5. a kind of HRB600E according to claims 4 contains the production method of the high-strength hot-rolled anti-seismic steel bar of vanadium, its feature
It is, the converter or electric furnace smelting operation that terminal Ingredients Weight percentage composition is controlled to C >=0.08%, P≤0.020%, terminal
1650～1680 DEG C of temperature.
6. a kind of HRB600E according to claims 4 contains the production method of the high-strength hot-rolled anti-seismic steel bar of vanadium, its feature
It is, the external refining operation that refining ensures soft argon blowing time >=8min after terminating, refining lifting temperature is 1570～1590
℃。
7. a kind of HRB600E according to claims 4 contains the production method of the high-strength hot-rolled anti-seismic steel bar of vanadium, its feature
It is, the continuous casting working procedure to be cast using continuous casting whole process protection, middle bag stability contorting is at 1520～1540 DEG C；Pulling rate be 1.7～
1.9m/min；Water Rate for Secondary Cooling Water is 0.9～1.3L/kg steel.
8. productions of a kind of HRB600E according to claims 4-7 any one containing the high-strength hot-rolled anti-seismic steel bar of vanadium
Method, it is characterised in that the heating strand operation, heating-up temperature is 1050 ± 50 DEG C.
9. productions of a kind of HRB600E according to claims 4-7 any one containing the high-strength hot-rolled anti-seismic steel bar of vanadium
Method, it is characterised in that the rolling process, start rolling temperature is 1020～1080 DEG C, and finishing temperature is 950～1000 DEG C.
10. productions of a kind of HRB600E according to claims 4-7 any one containing the high-strength hot-rolled anti-seismic steel bar of vanadium
Method, it is characterised in that the converter or electric furnace smelting operation, tapping process adds ferrosilicon, nitrided ferromanganese, silicomangan and vanadium
Nitrogen alloy carries out silicon, manganese, vanadium alloying；The external refining operation, refining terminal is fed calcium iron wire and carries out Calcium treatment.
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