CN105886902A - 400MPa-level vanadium-containing anti-seismic anti-corrosion rebar and production method thereof - Google Patents
400MPa-level vanadium-containing anti-seismic anti-corrosion rebar and production method thereof Download PDFInfo
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- CN105886902A CN105886902A CN201610406574.8A CN201610406574A CN105886902A CN 105886902 A CN105886902 A CN 105886902A CN 201610406574 A CN201610406574 A CN 201610406574A CN 105886902 A CN105886902 A CN 105886902A
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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
- C21D8/08—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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a 400MPa-level vanadium-containing anti-seismic anti-corrosion rebar and a production method thereof. The rebar is prepared from, by weight, 0.10-0.21% of C, 0.30-0.80% of Si, 1.0-1.60% of Mn, 0.6-1.0% of Cr, 0.05-0.40% of Cu, 0.020-0.10% of V, and the balance Fe and unavoidable impurities, the amount of P is smaller than or equal to 0.030%, and the amount of S is smaller than or equal to 0.030%. The production method includes converter or electric furnace smelting, steel ladle microalloying, external refining, continuous casting, casting blank heating, rolling and cooling bed air cooling. The corrosion resistance of the rebar is improved by controlling the content of Cr and Cu in steel, technological parameters are controlled strictly, the V(C,N) precipitation strengthening effect is promoted under the condition of ensuring steel-plastic tenacity, and the 400MPa-level vanadium-containing anti-seismic anti-corrosion rebar excellent in performance is obtained.
Description
Technical field
The present invention relates to a kind of 400MPa level and contain vanadium antidetonation corrosion-resistant steel bar and production method thereof, belong to metallurgical and Building wood
Material technical field.
Background technology
Along with the development of coastal area urbanization and to the development and utilization of marine resources, in coastal and ocean, build reinforcing bar
Xoncrete structure object has become certainty and has had the trend of extension, but currently used reinforced concrete structure steel bar corrosion feelings
Condition is more serious, and reinforcing bar is shorter for service life, the longest only 10～20 years, and buildings causes bigger potential safety hazard,
Therefore, the corrosive nature of reinforcing bar has become the hot issue that domestic and international project circle is paid close attention to, and exploitation has the steel of good corrosive nature
Muscle has become the major subjects of domestic and international industrialized country research.
For corrosion of reinforcing steel bar, the corrosion-resistant steel bar used the most both at home and abroad mainly have stainless steel rebar, galvanizing steel,
The reinforcing bars such as coated reinforcement.But all there is certain shortcoming, as high in stainless steel rebar production cost, expensive and popularization and application are stranded
Difficult；Galvanizing steel corrosion resistance is limited and welding is difficult；Coated reinforcement uses and requires strict and fragile reinforcing steel bar surface coating, accelerates
The problems such as reinforcement corrosion.
Summary of the invention
The present invention provide a kind of 400MPa level containing vanadium antidetonation corrosion-resistant steel bar and production method thereof, by control in steel Cr and
Cu content improves the corrosion resistance of reinforcing bar, and strictly controls steel-making and steel rolling process parameter, is ensureing steel plasticity and toughness
In the case of, it is to avoid the hot-working cracking that in steel, Cu produces, promote V(C, N) precipitation strength effect, obtain various aspects of performance excellent
400MPa level antidetonation corrosion-resistant steel bar Han vanadium.
The technical solution used in the present invention is:
A kind of 400MPa level antidetonation corrosion-resistant steel bar Han vanadium, count by weight percentage, its chemical composition be C:0.10～
0.21%, Si:0.30～0.80%, Mn:1.0～1.60%, P :≤0.030%, S :≤0.030%, Cr:0.6～1.0%, Cu:0.05
～0.40%, V:0.020～0.10%, remaining is Fe and inevitable impurity.
In reinforcing bar, the effect of chemical element is as follows:
C: be in steel in addition to ferrum topmost element.Carbon content increases, notable by the effect such as solution strengthening and precipitation strength
Improving the intensity of steel, but plasticity, toughness, particularly solderability decline, corrosion resistance, cold-bending property are also remarkably decreased simultaneously.
Si: be important reducing agent and deoxidizer, adds silicon and can significantly improve the elastic limit of steel, yield point and resist in steel
Tensile strength.Silicon and molybdenum, tungsten, chromium etc. combine, and raising corrosion resistance and non-oxidizability are had certain effect, and proper amount of silicon can improve steel
Intensity, and to plasticity, impact flexibility, cold-bending property and solderability without significant harmful effect.
Mn: be good deoxidizer and desulfurizing agent, acts primarily as solution strengthening effect in steel, is important intensified element,
Also being austenite former, appropriate manganese can be effectively improved steel strength simultaneously, eliminates sulfur, the oxygen hot-short impact on steel,
Improve steel heat processing characteristics, and improve the cold short tendency of steel, do not significantly reduce the plasticity of steel, impact flexibility, manganese simultaneously
The corrosion resistance of steel is affected little.
P/S: be easily formed harmful field trash in steel, reduces toughness and the plasticity of steel.The corrosion resisting property of steel is had necessarily by phosphorus
Benefit, part weathering steel uses the design of Cu-P set member, but its corrosion resisting property improves limited, and only for atmospheric corrosion.
Cr: non-oxidizability, decay resistance, through hardening performance, yield strength, tensile strength can be improved in steel.But non-
In Oxidant, the effect of Cr is not so good as molybdenum, nickel, individually adds chromium element and can not improve the sea water corrosion resistant of steel greatly,
And easily increasing spot corrosion tendency, Cr content is unfavorable for welding performance time higher simultaneously, therefore wants its scope of conservative control.
Cu: the decay resistance in non-oxidizing acid can be improved, particularly there is the ability of atmospheric corrosion resistance.Copper energy
Enough improve intensity and toughness, but easily produce when hot-working hot-short, when copper content is less, the welding performance of steel is affected
Less, and when copper content is higher, the plasticity and toughness of steel significantly reduce, and can produce hot-working cracking, and it is unfavorable for welding performance, because of
This wants its scope of conservative control.
V: can refine the grain structure of steel, improves the intensity of steel, and toughness and wearability, when vanadium fuses into austenite at high temperature
Time, the quenching degree of steel can be increased, when vanadium is present in steel with carbon formation carbide, then can reduce the quenching degree of steel, but at height
Can improve the resistant to hydrogen corrosive power of steel under temperature high pressure, the corrosion resistance of steel is affected little by vanadium.
Present invention also offers the above-mentioned 400MPa level production method containing vanadium antidetonation corrosion-resistant steel bar, including converter or electric furnace
Smelting, ladle microalloying, external refining, continuous casting, strand heating, rolling and cold bed air cooling.
In converter or electric furnace smelting step, during adding steel scrap, add copper billet or copper coin carries out copper alloy, converter
Terminal composition quality percentage composition controls as C:0.06%-0.12%, P≤0.020%, converter terminal temperature 1650～1680 DEG C.
In ladle microalloying step, add silicomangan or ferromanganese, ferrosilicon, ferrochrome and VN alloy carry out manganese, silicon, chromium
And vanadium alloying.
In external refining step, refine terminal feed calcium iron wire carry out Calcium treatment, refine ensure after terminating soft argon blowing time >=
8min, refine lifting temperature is 1570～1590 DEG C.
In continuous casting step, using the casting of continuous casting whole process protection, middle bag stability contorting is at 1525～1540 DEG C；Pulling rate is 1.7
～2.0m/min；Two cold specific waters are 0.9～1.3L/kg steel, use casting blank stacking slow cooling.
In strand heating steps, heating-up temperature is 1050 ± 50 DEG C.
In milling step, start rolling temperature is 1000～1050 DEG C, and finishing temperature is 950～1000 DEG C.
The 400MPa level that the present invention provides is containing vanadium antidetonation corrosion-resistant steel bar, common HRB400 reinforcing bar and the HRB400 reinforcing bar Han vanadium
Performance comparison data are shown in Table 1.Corrosion rate detects: testing equipment: cyclic corrosion case；Test period: 72h；NaCl concentration: 5%；
Temperature: 35 DEG C；Salt fog settling amount: 1.0ml/h 80cm2。
Table 1 reinforcing bar of the present invention, common HRB400 reinforcing bar and the HRB400 reinforcement property correction data Han vanadium
| Project | Rm/MPa | Rel/MPa | Rm/Rel | Rel/Rel0 | A/% | Agt/% | Corrosion rate/g/ (m2·h) |
| Reinforcing bar of the present invention | 590-690 | 460-510 | ≥1.27 | ≤1.24 | ≥18 | ≥11 | 0.217-0.432 |
| Common HRB400E reinforcing bar | ≥540 | ≥400 | ≥1.25 | ≤1.30 | ≥17 | ≥10 | 0.861-1.521 |
| Containing vanadium HRB400E reinforcing bar | 570-670 | 435-490 | ≥1.26 | ≤1.26 | ≥17 | ≥11 | 0.376-0.668 |
The present invention improves the corrosion resistance of reinforcing bar by controlling Cr and the Cu content in steel, by controlling V content in steel, promotes
V(C, N) precipitation strength effect, improves intensity and the resistant to hydrogen corrosive nature of steel, it is thus achieved that 400MPa level of the present invention antidetonation corrosion resistant Han vanadium
Erosion reinforcing bar, compared with other corrosion-resistant steel bars (such as galvanizing steel, stainless steel rebar etc.), the reinforcing bar of the present invention has excellent, steady
Fixed corrosion-resistant and mechanical property.Being shown by salt spray corrosion test, the decay resistance of the present invention is the 3 of common anti-seismic steel bar
～4 times, it is 1.5～2.0 times containing vanadium anti-seismic steel bar, mechanical property, welding performance are superior to common anti-seismic steel bar, resist with containing vanadium
Shake reinforcing bar is suitable.
The present invention is by the strict control to steel-making and steel rolling process parameter, and steel grade chemical composition stability, fluctuation range is relatively
Little, ensureing in the case of steel plasticity and toughness, it is to avoid the hot-working cracking that in steel, Cu produces, promoting V(C, N) precipitation strength effect,
Steel Bar Tensile Strength controls at 640 ± 50MPa, and yield strength controls at 480 ± 30MPa, and other all reach anti-seismic steel bar standard
Requirement, reinforcement property is the best.
Use and have the beneficial effects that produced by technique scheme:
The present invention improves the corrosion resistance of reinforcing bar by controlling Cr and Cu content in steel, and enters steel-making and steel rolling process parameter
Row is strict controls, in the case of ensureing steel plasticity and toughness, it is to avoid the hot-working cracking that in steel, Cu produces, and promotes V(C, N) separate out strong
Change effect, obtains 400MPa level antidetonation corrosion-resistant steel bar Han vanadium that various aspects of performance is excellent.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further；
In embodiment 1-6, the technological process containing vanadium antidetonation corrosion-resistant steel bar of the 400MPa level is: converter or electric furnace smelting → ladle are micro-
Alloying → external refining → continuous casting → strand heating → rolling → cold bed air cooling, concrete operation step is:
(1) smelt: molten iron is carried out together with steel scrap, copper billet or copper coin, slag material etc. decarburization dephosphorization smelting, wherein copper billet or copper
Plate is used for copper alloy, and the percentage by weight of aim carbon controls 0.06～0.12%, weight percentage P≤0.020% of phosphorus,
Outlet temperature controls at 1650～1680 DEG C.
(2) ladle microalloying: add silicomangan or ferromanganese, ferrosilicon, ferrochrome and vanadium nitrogen in step (1) tapping process
Alloy carries out manganese, silicon, chromium and vanadium alloying, and tapping process whole process Argon stirs.
(3) external refining: step (2) molten steel is delivered to LF stove and carries out refine, become more meticulous control to liquid steel temperature, composition
System, refine overall process Bottom Argon Stirring, promote inclusion floating, calcium iron wire regulation field trash type fed by molten steel by refine terminal,
And soft blow more than argon 8min, promote inclusion floating, improve steel performance；Refine lifting temperature is 1570～1590 DEG C.
(4) continuous casting: step 3 is sent to continuous casting production, continuous casting whole process protection casts, tundish temperature control 1525～
1540 DEG C, pulling rate is 1.7～2.0m/min, and two cold specific waters are 0.9～1.3L/kg, and strand uses stacking slow cooling.
(5) strand heating and rolling: by step 4 strand heating and thermal insulation at a temperature of 1050 ± 50 DEG C, control start rolling temperature
At 1000～1050 DEG C, finishing temperature is at 950～1000 DEG C.
(6) cold bed air cooling: by gained steel natural air cooling on walking beam cooler, carries out fixed size scissors the most as requested
Cut, put in storage.
The technological parameter of embodiment 1-6 is shown in Table 2:
The technological parameter of table 2 embodiment 1-6
In embodiment 1-6 and comparative example 1-2, the composition of steel is shown in Table 3.Comparative example 1 commonly wears water antidetonation for industrial
HRB400E reinforcing bar；Comparative example 2 is industrial containing vanadium antidetonation HRB400E reinforcing bar.
Table 3 embodiment 1-6 and the composition of steel of comparative example 1-2
The reinforcing bar producing embodiment 1-6 and comparative example 1-2 carries out performance detection, and testing result is shown in Table 4；
The reinforcement property that table 4 embodiment 1-6 and comparative example 1-2 produce
| Numbering | Rm/MPa | Rel/MPa | Rm/Rel | Rel/Rel0 | A/% | Agt/% | Corrosion rate/g/ (m2·h) |
| Embodiment 1 | 630 | 480 | 1.31 | 1.20 | 23 | 14 | 0.219 |
| Embodiment 2 | 630 | 465 | 1.35 | 1.16 | 18 | 12 | 0.256 |
| Embodiment 3 | 615 | 475 | 1.29 | 1.19 | 19 | 14 | 0.337 |
| Embodiment 4 | 650 | 485 | 1.34 | 1.21 | 20 | 14 | 0.431 |
| Embodiment 5 | 611 | 469 | 1.23 | 1.15 | 21 | 13 | 0.341 |
| Embodiment 6 | 641 | 479 | 1.30 | 1.19 | 20 | 14 | 0.421 |
| Comparative example 1 | 560 | 425 | 1.31 | 1.06 | 22 | 14 | 0.921 |
| Comparative example 2 | 585 | 455 | 1.29 | 1.14 | 24 | 15 | 0.496 |
As shown in Table 4, the reinforcing bar decay resistance of the present invention and mechanical property are substantially better than common antidetonation HRB400E reinforcing bar, power
Learn performance and welding performance suitable with containing vanadium antidetonation HRB400E reinforcing bar, corrosion-resistant and good mechanical performance.
Claims (8)
1. 400MPa level antidetonation corrosion-resistant steel bar Han vanadium, it is characterised in that: count by weight percentage, its chemical composition is
C:0.10～0.21%, Si:0.30～0.80%, Mn:1.0～1.60%, P :≤0.030%, S :≤0.030%, Cr:0.6～
1.0%, Cu:0.05～0.40%, V:0.020～0.10%, remaining is Fe and inevitable impurity.
A kind of 400MPa level the most according to claim 1 production method containing vanadium antidetonation corrosion-resistant steel bar, it is characterised in that:
Including converter or electric furnace smelting, ladle microalloying, external refining, continuous casting, strand heating, rolling and cold bed air cooling.
A kind of 400MPa level the most according to claim 2 is containing vanadium antidetonation corrosion-resistant steel bar and production method thereof, and its feature exists
In: in described converter or electric furnace smelting step, adding copper billet or copper coin carries out copper alloy during adding steel scrap, converter is eventually
Point composition quality percentage composition controls as C:0.06%-0.12%, P≤0.020%, converter terminal temperature 1650～1680 DEG C.
A kind of 400MPa level the most according to claim 2 production method containing vanadium antidetonation corrosion-resistant steel bar, it is characterised in that:
In described ladle microalloying step, add silicomangan or ferromanganese, ferrosilicon, ferrochrome and VN alloy carry out manganese, silicon, chromium and vanadium
Alloying.
A kind of 400MPa level the most according to claim 2 production method containing vanadium antidetonation corrosion-resistant steel bar, it is characterised in that:
In described external refining step, refine terminal is fed calcium iron wire and is carried out Calcium treatment, and refine ensures soft argon blowing time >=8min after terminating,
Refine lifting temperature is 1570～1590 DEG C.
A kind of 400MPa level the most according to claim 2 production method containing vanadium antidetonation corrosion-resistant steel bar, it is characterised in that:
In described continuous casting step, using the casting of continuous casting whole process protection, middle bag stability contorting is at 1525～1540 DEG C；Pulling rate be 1.7～
2.0m/min；Two cold specific waters are 0.9～1.3L/kg steel, use casting blank stacking slow cooling.
A kind of 400MPa level the most according to claim 2 production method containing vanadium antidetonation corrosion-resistant steel bar, it is characterised in that
In described strand heating steps, heating-up temperature is 1050 ± 50 DEG C.
A kind of 400MPa level the most according to claim 2 production method containing vanadium antidetonation corrosion-resistant steel bar, it is characterised in that
In described milling step, heating start rolling temperature is 1000～1050 DEG C, and finishing temperature is 950～1000 DEG C.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756518A (en) * | 2017-02-24 | 2017-05-31 | 河钢股份有限公司承德分公司 | A kind of 500MPa grades of corrosion-resistant steel bar and production method |
| CN106957991A (en) * | 2017-05-08 | 2017-07-18 | 钢铁研究总院 | A kind of precipitation Controlled cooling process of hot-rolled microalloy reinforcing bar |
| CN107254639A (en) * | 2017-06-01 | 2017-10-17 | 马鞍山钢铁股份有限公司 | A kind of control method of the effective steel of ultra supercritical high-pressure boiler and its continuous casting billet centre burst |
| CN107604261A (en) * | 2017-07-18 | 2018-01-19 | 河钢股份有限公司承德分公司 | Mark SD345 spirals with ribbing and its production method a kind of day |
| CN107866538A (en) * | 2017-11-24 | 2018-04-03 | 南京钢铁股份有限公司 | A kind of billet continuous casting production method of the nitrogenous microalloying peritectic steel containing vanadium |
| CN108441782A (en) * | 2018-02-28 | 2018-08-24 | 河钢股份有限公司承德分公司 | A kind of carbon equivalent high corrosion-resistant steel bar and its heat treatment method |
| CN108950135A (en) * | 2018-09-03 | 2018-12-07 | 包头钢铁（集团）有限责任公司 | The production method of HRB400 reinforcing bar and HRB400 reinforcing bar |
| CN109295390A (en) * | 2018-11-16 | 2019-02-01 | 河钢股份有限公司承德分公司 | A kind of superelevation strong corrosion resistant reinforcing bar and its production method |
| CN110453136A (en) * | 2019-09-11 | 2019-11-15 | 莱芜泰铼经贸有限公司 | A kind of hot rolling antirust reinforcing bar and its production method |
| CN110952037A (en) * | 2019-11-18 | 2020-04-03 | 阳春新钢铁有限责任公司 | 400MPa hot-rolled refractory steel bar and manufacturing method thereof |
| CN111088463A (en) * | 2020-01-21 | 2020-05-01 | 鞍钢股份有限公司 | Steel bar resistant to corrosion in low-temperature atmospheric environment and production method thereof |
| CN113278868A (en) * | 2021-05-07 | 2021-08-20 | 石横特钢集团有限公司 | Smelting process and production method of blank for chloride ion corrosion resistant steel bar |
| CN113293334A (en) * | 2021-05-25 | 2021-08-24 | 宁夏钢铁(集团)有限责任公司 | Preparation method of 400 MPa-grade industrial atmospheric corrosion resistant steel bar |
| CN113802067A (en) * | 2020-06-13 | 2021-12-17 | 阳春新钢铁有限责任公司 | Production method of molybdenum-vanadium series refractory high-strength steel bar |
| CN114196884A (en) * | 2021-12-13 | 2022-03-18 | 芜湖新兴铸管有限责任公司 | 400 MPa-grade microalloyed corrosion-resistant reinforcing steel bar and production method thereof |
| CN114855089A (en) * | 2022-05-25 | 2022-08-05 | 湖南华菱湘潭钢铁有限公司 | Production method of 400 MPa-grade high-corrosion-resistance hot-rolled ribbed steel bar |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756518A (en) * | 2017-02-24 | 2017-05-31 | 河钢股份有限公司承德分公司 | A kind of 500MPa grades of corrosion-resistant steel bar and production method |
| CN106957991A (en) * | 2017-05-08 | 2017-07-18 | 钢铁研究总院 | A kind of precipitation Controlled cooling process of hot-rolled microalloy reinforcing bar |
| CN106957991B (en) * | 2017-05-08 | 2018-07-03 | 钢铁研究总院 | A kind of precipitation Controlled cooling process of hot-rolled microalloy reinforcing bar |
| CN107254639A (en) * | 2017-06-01 | 2017-10-17 | 马鞍山钢铁股份有限公司 | A kind of control method of the effective steel of ultra supercritical high-pressure boiler and its continuous casting billet centre burst |
| CN107254639B (en) * | 2017-06-01 | 2019-03-15 | 马鞍山钢铁股份有限公司 | A kind of control method of the effective steel of ultra supercritical high-pressure boiler and its continuous casting billet centre burst |
| CN107604261A (en) * | 2017-07-18 | 2018-01-19 | 河钢股份有限公司承德分公司 | Mark SD345 spirals with ribbing and its production method a kind of day |
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Application publication date: 20160824 |