CN107312972A - Steel construction earthquake-resistant hot rolled H profile steels of Q390KZ and preparation method thereof - Google Patents
Steel construction earthquake-resistant hot rolled H profile steels of Q390KZ and preparation method thereof Download PDFInfo
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- CN107312972A CN107312972A CN201710392307.4A CN201710392307A CN107312972A CN 107312972 A CN107312972 A CN 107312972A CN 201710392307 A CN201710392307 A CN 201710392307A CN 107312972 A CN107312972 A CN 107312972A
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- q390kz
- hot rolled
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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
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of steel construction earthquake-resistant hot rolled H profile steels of Q390KZ, chemical composition is 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 elements.The invention also discloses a kind of preparation method of steel construction with the earthquake-resistant hot rolled H profile steels of Q390KZ.There is good welding performance and low-temperature impact-resistant performance in itself the invention enables material.
Description
Technical field
The present invention relates to a kind of metallurgical material technology, specifically, it is related to a kind of earthquake-resistant hot rolled H profile steels of steel construction Q390KZ
And preparation method thereof.
Background technology
Earthquake is a kind of serious natural calamity that human society faces.According to statistics, the earth occurs 5,000,000 times per annual
The earthquake of left and right, wherein, more than 5 grades of ruinous earthquake is accounted for 1000 times.Earthquake generally to the mankind bring huge economy and
Property loss, its influence produced is remote.Seismic events are sudden strong, and the duration is short, can in several seconds
Cause injures and deaths and the facility destruction of personnel.
Currently the present situation of space structure design is both at home and abroad：Static analysis is only typically done, when also doing power to major design
Journey response analysis, but mostly it is confined to linear analysis, the influence to initial geometrical defect, the influence of non-linear factor, rigidity square
Battle array anon-normal is pledged love the processing of condition, and Dynamic Stability Analysis is not accounted for also, so that such space structure can not be furtherd investigate
Dynamic characteristics, bearing capacity and dynamic instability mechanism, it is impossible to make full use of the potentiality of structural material, design more economical reasonable
Structure.At present, 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
Structure is built under rarely occurred earthquake effect heavy damage (as produced larger space residual deformation) or decayed, and need to carry out structural elasticity modeling
Property seismic response analysis, check structure ultimate deformation.At present, the change of Structures under Earthquake can't be checked completely in the world
Shape force modes.
At present, the external anti-seismic performance research to reinforcing bar, steel plate is more, but does not also carry out standard to anti-seismic H-type steel
Formulation and research.So, it need further research to anti-seismic H-type steel
The content of the invention
Technical problem solved by the invention is to provide a kind of earthquake-resistant hot rolled H profile steels of steel construction Q390KZ and its preparation side
Method so that material has good welding performance and low-temperature impact-resistant performance in itself.
Technical scheme is as follows：
A kind of steel construction earthquake-resistant hot rolled H profile steels of Q390KZ, chemical composition 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 elements.
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 steel construction earthquake-resistant hot rolled H profile steels of Q390KZ, including smelting process, the operation of rolling, smelt
During, molten iron pretreatment control converter enters w [S]≤0.010% in stove molten iron；VD stoves argon blowing time is no less than 15min, continuous casting
The pulling rate scope 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
Spend for 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 steels of Q390KZ
Chemical composition 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 elements.
It is preferred that：During converter smelting, Tapping Temperature of Bof is improved to 1615 DEG C, the quantity of slag under control converter；LF stoves are smart to be added
Hot time and refining time are 25min and 55min, the specific water 0.35L/mg of continuous casting.
It is preferred that：The chemical compositions of the earthquake-resistant hot rolled H profile steels of Q390KZ is obtained 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：
1st, the material for being currently used for building structure aseismatic is mainly reinforcing bar HRB400E, although the earthquake-resistant hot rolled H profile steels of Q390KZ
The main performance such as yield strength and tensile strength is less than HRB400E, but its elongation has obvious advantage.Due to steel knot
The structure earthquake-resistant hot rolled H profile steels of Q390KZ have fabulous ductility, good component connection, reliable node, in reciprocal lotus of low week
Carry the lower hysteresis loop with full stabilization.
2nd, the present invention reduces C content, adds 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 the earthquake-resistant hot rolled H profile steels of Q390KZ are produced, use
Narrow composition design, can meet the earthquake-resistant hot rolled H profile steel yield strengths of Q390KZ and tensile strength, and fluctuation range is smaller.Pass through control
System steel-making and the operation of rolling, can improve the intensity and toughness of H profile steel.
3rd, production technology has the advantages that low-carbon, green, energy-saving and environmental protection, with very strong economic benefit and social benefit,
It is the direction of H profile steel performance development in following steel construction.
Embodiment
Technical solution of the present invention is elaborated below with reference to example embodiment.However, example embodiment can
Implement in a variety of forms, and be 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 conveyed to those skilled in the art by the present invention.
From the angle of social sustainable development, traditional brick mixes the mode of production of reinforced concrete structure, not
The need for adapting to architectural development, and steel structure system have be easy to implement standardization, component, industrialization, production and operation one
Body, and save, economize on water, saving land, saving the features such as material, repeatable utilization, the glamour of " economizing type building " is fully presented, is
The ideal architecture form of China's modernization of the housing industry is promoted, the production and operation side of existing house can be fundamentally solved and change
Formula.
The preparation method of the steel construction earthquake-resistant hot rolled H profile steels of Q390KZ, including smelting process and the operation of rolling, are specifically included
Following steps：
First, smelting process
1st, molten iron is pre-processed；
Control converter enters w [S]≤0.010% in stove molten iron；
2nd, converter smelting；
Tapping Temperature of Bof is improved to 1615 DEG C or so, the quantity of slag under control converter.
3rd, LF refining；
Extend LF stoves refining time and the low pulling rate cast of continuous casting.Heat time and refining time are 25min and 55min.
4th, VD vacuum refinings；
VD stoves argon blowing time is no less than 15min, and the pulling rate scope of conticaster is 0.8m/min~0.85m/min.
5th, continuous casting.
The degree of superheat is less than 30 DEG C, specific water 0.35L/mg.Produce up-to-standard continuous casting billet.
2nd, the operation of rolling
Rolling mill practice is：Hot Metal in Beam Blank → stepped heating stove heat → water under high pressure dephosphorization → BD1 rollings → CCS tandem rollings → 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 steels of Q390KZ, its chemical composition according to mass percent meter, including：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 elements, and mass fraction is 100%.
C content is relatively low in the steel grade, in earthquake-resistant hot rolled H profile steel manufacturing process, it is possessed good welding performance.
Si can play a part of solution strengthening in the material, make the increase of its intensity.Mn elements can be dissolved in ferrite, play solid solution strong
The effect of change, increases the intensity of H profile steel, and refined crystalline strengthening effect is played in the addition that Nb and Ti elements are added in the material to steel grade,
Not only the intensity of material had been increased but also had added the moulding of material, this steel grade uses narrow composition design in addition, it can be ensured that anti-seismic H-type steel
Strong flexor ratio it is stable, fluctuation range is smaller.
Four batches are sampled, specific composition is as shown in table 1.
Each example composition of table 1 (mass percent/%)
Impact test uses 10mmxl0mmx55mm Charpy v-notch samples, and test temperature is -20 DEG C of 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 exemplary and nonrestrictive term.Because the present invention can be with a variety of
Form specific implementation without departing from the spiritual or substantive of invention, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and should widely being explained in the spirit and scope that appended claims are limited, thus fall into claim or its etc.
Whole changes and remodeling in the range of effect all should be appended claims and covered.
Claims (5)
1. a kind of steel construction earthquake-resistant hot rolled H profile steels of Q390KZ, it is characterised in that：Chemical composition is according to mass percent meter, bag
Include 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 elements.
2. the steel construction as claimed in claim 1 earthquake-resistant hot rolled H profile steels of Q390KZ, it is characterised in that：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%.
3. a kind of steel construction preparation method of the earthquake-resistant hot rolled H profile steels of Q390KZ, including smelting process, the operation of rolling, its feature
It is：In smelting process, molten iron pretreatment control converter enters w [S]≤0.010% in stove molten iron；VD stove argon blowing times are no less than
15min, the pulling rate scope 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 Q390KZ antidetonations
Hot rolled H-shaped chemical composition is 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 elements.
4. the steel construction as claimed in claim 3 preparation method of the earthquake-resistant hot rolled H profile steels of Q390KZ, it is characterised in that：Converter smelting
During refining, Tapping Temperature of Bof is improved to 1615 DEG C, the quantity of slag under control converter；The heat time of LF stoves essence and refining time are
25min and 55min, the specific water 0.35L/mg of continuous casting.
5. the steel construction as claimed in claim 3 preparation method of the earthquake-resistant hot rolled H profile steels of Q390KZ, it is characterised in that：Obtain
The chemical composition of the earthquake-resistant hot rolled H profile steels 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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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09137249A (en) * | 1995-11-10 | 1997-05-27 | Kawasaki Steel Corp | Hot rolled hightensile strength steel plate excellent in fatigue characteristic and workability and its production |
| 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 | Method for manufacturing transformation induced plasticity steel seamless tube on line |
-
2017
- 2017-05-27 CN CN201710392307.4A patent/CN107312972B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09137249A (en) * | 1995-11-10 | 1997-05-27 | Kawasaki Steel Corp | Hot rolled hightensile strength steel plate excellent in fatigue characteristic and workability and its production |
| 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 | Method for manufacturing transformation induced plasticity steel seamless tube on line |
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