CN107312972B - The preparation method of the steel construction earthquake-resistant hot rolled H profile steel of Q390KZ - Google Patents
The preparation method of the steel construction earthquake-resistant hot rolled H profile steel of Q390KZ Download PDFInfo
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- CN107312972B CN107312972B CN201710392307.4A CN201710392307A CN107312972B CN 107312972 B CN107312972 B CN 107312972B CN 201710392307 A CN201710392307 A CN 201710392307A CN 107312972 B CN107312972 B CN 107312972B
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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
- C22C38/02—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
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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Abstract
The invention discloses a kind of steel construction preparation methods of the earthquake-resistant hot rolled H profile steel of Q390KZ, in smelting process, molten iron pretreatment control converter enters w [S]≤0.010% in furnace molten iron, when converter smelting, Tapping Temperature of Bof is improved to 1615 DEG C, controls the quantity of slag under converter；The heating time of LF refining furnace and refining time are 25min and 55min, the specific water 0.35L/kg of continuous casting；VD furnace argon blowing time is no less than 15min, and the pulling rate range of conticaster is 0.8m/min~0.85m/min, and the degree of superheat of continuous casting is less than 30 DEG C；In the operation of rolling, billet heating temperature is 1180~1210 DEG C, start rolling temperature≤1180 DEG C, 870~890 DEG C of finishing temperature；Obtain the earthquake-resistant hot rolled H profile steel of Q390KZ.The invention enables materials itself to have good welding performance and low-temperature impact-resistant performance.
Description
Technical field
The present invention relates to a kind of metallurgical material technologies, specifically, are related to a kind of earthquake-resistant hot rolled H profile steel of steel construction Q390KZ
Preparation method.
Background technique
Earthquake is a kind of serious natural calamity that human society faces.According to statistics, the every annual of the earth occurs 5,000,000 times
The earthquake of left and right, wherein 5 grades or more of ruinous earthquake accounts for about 1000 times.Earthquake usually to the mankind bring it is huge economical and
Property loss, the influence generated is remote.Seismic events are sudden strong, and the duration is short, can in several seconds
The injures and deaths and facility for causing personnel are destroyed.
The status of current space structure design both at home and abroad is: generally static analysis is only done, when also doing power to major design
Journey response analysis, but it is mostly confined to linear analysis, the influence to initial geometrical defect, the influence of non-linear factor, rigidity square
The processing of the non-positive definite situation of battle array, Dynamic Stability Analysis is not yet it is considered that further investigate such space structure
Dynamic characteristics, bearing capacity and dynamic instability mechanism are unable to fully the potentiality using structural material, and it is more economical reasonable to design
Structure.Currently, generally acknowledged seismic design of structures principle is " no damage in small earthquake, big shake less than " in the world.To prevent Tall Steel knot
Building, which is built, seriously to be destroyed (as generated larger space residual deformation) or decays under rarely occurred earthquake effect, and structural elasticity modeling need to be carried out
Property seismic response analysis, checks the ultimate deformation of structure.Currently, the change of geological process flowering structure can't be checked completely in the world
Shape force modes.
Currently, it is external more to the anti-seismic performance research of reinforcing bar, steel plate, but standard is carried out to anti-seismic H-type steel not yet
Formulation and research.So being needed to be further studied to anti-seismic H-type steel
Summary of the invention
Technical problem solved by the invention is to provide a kind of earthquake-resistant hot rolled H profile steel of steel construction Q390KZ and its preparation side
Method, so that material itself has good welding performance and low-temperature impact-resistant performance.
Technical solution is as follows:
A kind of steel construction earthquake-resistant hot rolled H profile steel of Q390KZ, chemical component according to mass percent meter, including C 0.16~
0.18%, Si 0.55~0.58%, Mn 1.5~1.7%, P≤0.035%, S≤0.035%, Nb 0.04~0.07%, Ti
0.16~0.18%, remaining is Fe element.
Further, C 0.16~0.18%, Si 0.55~0.58%, Mn 1.5~1.7%, P 0.015~0.032%,
S 0.020~0.035%, Nb 0.04~0.07%, Ti 0.16~0.18%.
A kind of preparation method of the steel construction earthquake-resistant hot rolled H profile steel of Q390KZ, including smelting process, the operation of rolling are smelted
In the process, molten iron pretreatment control converter enters w [S]≤0.010% in furnace molten iron；VD furnace argon blowing time is no less than 15min, continuous casting
The pulling rate range of machine is 0.8m/min~0.85m/min, and the degree of superheat of continuous casting is less than 30 DEG C；In the operation of rolling, heating steel billet temperature
Degree is 1180~1210 DEG C, start rolling temperature≤1180 DEG C, 870~890 DEG C of finishing temperature；Obtain the earthquake-resistant hot rolled H profile steel of Q390KZ
Chemical component according to mass percent meter, including C 0.16~0.18%, Si 0.55~0.58%, Mn 1.5~1.7%, P
≤ 0.035%, S≤0.035%, Nb 0.04~0.07%, Ti 0.16~0.18%, remaining is Fe element.
It is preferred: when converter smelting, to improve Tapping Temperature of Bof to 1615 DEG C, control the quantity of slag under converter；LF refining furnace
Heating time and refining time are 25min and 55min, the specific water 0.35L/kg of continuous casting.
It is preferred: obtain the chemical component of the earthquake-resistant hot rolled H profile steel of Q390KZ according to mass percent meter, C 0.16~
0.18%, Si 0.55~0.58%, Mn 1.5~1.7%, P 0.015~0.032%, S 0.020~0.035%, Nb
0.04~0.07%, Ti 0.16~0.18%.
Compared with prior art, the technology of the present invention effect includes:
1, the material for being currently used for building structure aseismatic is mainly reinforcing bar HRB400E, although the earthquake-resistant hot rolled H profile steel of Q390KZ
The main performances such as yield strength and tensile strength are less than HRB400E, but its elongation has apparent advantage.Due to steel knot
The structure earthquake-resistant hot rolled H profile steel of Q390KZ has fabulous ductility, good component connection, reliable node, in low week reciprocal lotus
It carries lower with full stable hysteresis loop.
2, the present invention reduces C content, increases the alloying elements such as Nb and Ti, make material in the design process of material
Itself has good welding performance and low-temperature impact-resistant performance；During production Q390KZ earthquake-resistant hot rolled H profile steel, use
Narrow ingredient design, can satisfy the earthquake-resistant hot rolled H profile steel yield strength of Q390KZ and tensile strength, fluctuation range is smaller.Pass through control
System steel-making and the operation of rolling, can be improved the intensity and toughness of H profile steel.
3, production technology has many advantages, such as low-carbon, green, energy-saving and environmental protection, has very strong economic benefit and social benefit,
It is the direction that H profile steel service performance develops in the following steel construction.
Specific embodiment
It elaborates below with reference to example embodiment to technical solution of the present invention.However, example embodiment can
Implement in a variety of forms, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively communicated to those skilled in the art by the present invention.
From the angle of social sustainable development, traditional brick mixes the production method of reinforced concrete structure, not
Adapt to the needs of architectural development, and steel structure system has and is easy to implement standardization, component, industrialization, production and operation one
Body, and energy saving, water-saving, the features such as saving land, saving material, is reusable, sufficiently present the glamour of " economizing type building ", are
The ideal architecture form for promoting China's modernization of the housing industry, can fundamentally solve and change the production and operation side of existing house
Formula.
The preparation method of the steel construction earthquake-resistant hot rolled H profile steel of Q390KZ, including smelting process and the operation of rolling, specifically include
Following steps:
One, smelting process
1, molten iron pre-processes；
Control converter enters w [S]≤0.010% in furnace molten iron；
2, converter smelting；
Tapping Temperature of Bof is improved to 1615 DEG C or so, controls the quantity of slag under converter.
3, LF refining；
Extend LF furnace refining time and the low pulling rate casting of continuous casting.Heating time and refining time are 25min and 55min.
4, VD vacuum refining；
VD furnace argon blowing time is no less than 15min, and the pulling rate range of conticaster is 0.8m/min~0.85m/min.
5, continuous casting.
The degree of superheat is less than 30 DEG C, specific water 0.35L/kg.Produce up-to-standard continuous casting billet.
Two, the operation of rolling
Rolling mill practice are as follows: Hot Metal in Beam Blank → stepped heating stove heating → high pressure water dephosphorization → BD1 rolling → CCS tandem rolling → saw
Cut → sample → cold bed pre-bending → crop end → aligning → inspection → bundling → storage.
In the operation of rolling, billet heating temperature is 1180~1210 DEG C, start rolling temperature≤1180 DEG C, finishing temperature 870~
890℃。
The finished product steel construction earthquake-resistant hot rolled H profile steel of Q390KZ, chemical component is according to mass percent meter, comprising: C
0.16~0.18%, Si 0.55~0.60%, Mn 1.5~1.7%, P≤0.035%, S≤0.035%, Nb 0.04~
0.07%, Ti 0.16~0.18%, remaining is Fe element, mass fraction 100%.
C content is lower in the steel grade, in earthquake-resistant hot rolled H profile steel manufacturing process, it is made to have good welding performance.
Si can play the role of solution strengthening in the material, increase its intensity.Mn element can be dissolved in ferrite, and it is strong to play solid solution
The effect of change increases the intensity of H profile steel, and the addition that Nb and Ti element is added in the material plays the role of refined crystalline strengthening to steel grade,
Not only the intensity of material had been increased but also had increased the moulding of material, in addition this steel grade is designed using narrow ingredient, it can be ensured that anti-seismic H-type steel
Strong flexor ratio stablize, fluctuation range is smaller.
Four batches are sampled, specific ingredient is as shown in table 1.
1 each example ingredient (mass percent/%) of table
Impact test uses 10mmxl0mmx55mm Charpy v-notch sample, and test temperature is -20 DEG C 5 DEG C of soil, experiment knot
Fruit is as shown in table 2.
Each example mechanical property of table 2
From table 2 it can be seen that each example has good strength, toughness and mechanical property.
Term used herein is explanation and term exemplary, and not restrictive.Since the present invention can be with a variety of
Form be embodied without departing from invention spirit or essence, it should therefore be appreciated that above-described embodiment be not limited to it is any above-mentioned
Details, and should widely explaining within the spirit and scope of the appended claims, thus fall into claim or its etc.
Whole change and modification in effect range all should be appended claims and be covered.
Claims (2)
1. a kind of steel construction preparation method of the earthquake-resistant hot rolled H profile steel of Q390KZ, including smelting process, the operation of rolling, feature
Be: in smelting process, molten iron pretreatment control converter enters w [S]≤0.010% in furnace molten iron, when converter smelting, improves converter
Tapping temperature controls the quantity of slag under converter to 1615 DEG C；The heating time of LF refining furnace and refining time are 25min and 55min, even
The specific water 0.35L/kg of casting；VD furnace argon blowing time is no less than 15min, and the pulling rate range of conticaster is 0.8m/min~0.85m/
Min, the degree of superheat of continuous casting is less than 30 DEG C；In the operation of rolling, billet heating temperature is 1180~1210 DEG C, start rolling temperature≤1180
DEG C, 870~890 DEG C of finishing temperature；The chemical component of the earthquake-resistant hot rolled H profile steel of Q390KZ is obtained according to mass percent meter, including C
0.16~0.18%, Si 0.55~0.58%, Mn 1.5~1.7%, P≤0.035%, S≤0.035%, Nb 0.04~
0.07%, Ti 0.16~0.18%, remaining is Fe element.
2. the steel construction as described in claim 1 preparation method of the earthquake-resistant hot rolled H profile steel of Q390KZ, it is characterised in that: obtain
The chemical component of the earthquake-resistant hot rolled H profile steel of Q390KZ is according to mass percent meter, C 0.16~0.18%, Si 0.55~0.58%,
Mn 1.5~1.7%, P 0.015~0.032%, S 0.020~0.035%, Nb 0.04~0.07%, Ti 0.16~
0.18%.
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| CN107312972B true CN107312972B (en) | 2019-01-29 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1952199A (en) * | 2005-10-17 | 2007-04-25 | 马鞍山钢铁股份有限公司 | Niobium titanium -combined microalloying steel for cooling-control reinforced bar and method for producing same |
| CN102345056A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | Structural steel S420ML medium and heavy plate and production method thereof |
| CN102363833A (en) * | 2011-10-28 | 2012-02-29 | 东北大学 | A method for on-line manufacturing phase transformation induced plasticity steel seamless pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3520632B2 (en) * | 1995-11-10 | 2004-04-19 | Ｊｆｅスチール株式会社 | Hot-rolled high-strength steel sheet excellent in fatigue characteristics and workability and method for producing the same |
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- 2017-05-27 CN CN201710392307.4A patent/CN107312972B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952199A (en) * | 2005-10-17 | 2007-04-25 | 马鞍山钢铁股份有限公司 | Niobium titanium -combined microalloying steel for cooling-control reinforced bar and method for producing same |
| CN102345056A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | Structural steel S420ML medium and heavy plate and production method thereof |
| CN102363833A (en) * | 2011-10-28 | 2012-02-29 | 东北大学 | A method for on-line manufacturing phase transformation induced plasticity steel seamless pipe |
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