CN102828113A - 100MPa high-performance mild steel for building structure and manufacturing method thereof - Google Patents
100MPa high-performance mild steel for building structure and manufacturing method thereof Download PDFInfo
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- CN102828113A CN102828113A CN2011101601026A CN201110160102A CN102828113A CN 102828113 A CN102828113 A CN 102828113A CN 2011101601026 A CN2011101601026 A CN 2011101601026A CN 201110160102 A CN201110160102 A CN 201110160102A CN 102828113 A CN102828113 A CN 102828113A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 238000009749 continuous casting Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 13
- 238000009825 accumulation Methods 0.000 claims description 2
- 238000007669 thermal treatment Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 229910000746 Structural steel Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention provides a 100MPa high-performance mild steel for a building structure and a manufacturing method thereof, wherein the steel comprises the following chemical components: 0.001-0.0045% of C, less than or equal to 0.05% of Si, 0.009-0.048% of Mn, 0.011-0.045% of Tis, 0.004-0.070% of Als, and the balance of Fe and inevitable impurities. The manufacturing method comprises smelting, continuous casting, billet heating and two-stage controlled rolling, and is characterized in that the billet heating temperature is 1100-1280 ℃, and the heating time is 60-110 s/mm; the rough rolling and final rolling temperature is 950-1080 ℃; the initial rolling temperature of finish rolling is 900-1050 ℃, the finishing rolling temperature is 820-960 ℃, and the accumulated deformation is more than 45%; and naturally cooling the rolled steel plate. The steel has simple chemical components and low cost; the yield strength fluctuation range of the steel plate is 80-120 MPa, and the longitudinal low-temperature toughness at-20 ℃ is more than 80J.
Description
Technical field
The invention belongs to the metallic substance technical field, relate in particular to a kind of 100MPa rank high-performance anti-seismic shock insulation building structure low-yield mild steel and method of manufacture thereof.
Background technology
The seismic design notion of Modern Steel Structure, the whole antidetonation from steelwork changes the shock-mitigating device that some member designs is become structure into, makes it when big shake, at first surrender power consumption, and all the other steelwork then are in elastic stage.Reparation problem for the earthquake after strain that solves steel house begins the shock insulation building structure of development and utilization antidetonation more and more low-yield mild steel vibroshock both at home and abroad as shock-mitigating device.
The relevant 100MPa rank low-yield building structural steel technology of having had only day disclosure at present; Like publication number is JP10324918A, and the Japanese Patent of " the low-yield structure is with the method for manufacture of steel plate " by name discloses the method for manufacture of a kind of yield-point less than the 100MPa steel plate.It is a kind of low C, Mn, Al, Ti, Nb, B alloy system, does not add elements such as other alloy in the steel.Can make the ys of steel be controlled at 80～180N/mm through hot rolling or heat-treating methods
2In the scope, unit elongation is greater than 40%.But because the ys variation range is bigger; Be unfavorable for the design and the manufacturing of mild steel shock-damping structure, and lower from visible its finishing temperature of embodiment, between 700～850 ℃; Lower finishing temperature is higher to the Capability Requirement of milling train, influences rhythm of production and production efficiency.Adopt 800～900 ℃ of roughening treatments that are annealed to 500 ℃ of air coolings to improve performance after the hot rolling, annealing and roughening treatment have increased production cost and have reduced production efficiency, and complex process.Adopt alloying elements such as Nb, B to be unfavorable for the control of cost simultaneously, the adding of B also possibly cause the deterioration of impelling strength.
Be not difficult to find out that from above patent and art technology Status of development mainly there is following problem in low-yield mild steel vibroshock with the production of steel plate at present:
1) major part needs to cooperate normalizing, annealing or high tempering, and production cost is higher;
2) to require be 0 ℃ to low-temperature flexibility basically, is difficult to satisfy design and the construction needs to steelwork in northern low temp area winter;
3) the ys variation range is bigger, in the 100MPa scope, is unfavorable for the design and the manufacturing of mild steel shock-damping structure;
4) adopt alloying elements such as Nb, B to be unfavorable for the control of cost, the adding of B also possibly cause the deterioration of impelling strength.
Summary of the invention
The objective of the invention is to overcome the deficiency that above-mentioned prior art exists, a kind of cost is low, low-temperature flexibility good, the ys fluctuation range is little low-yield building structural steel and method of manufacture thereof are provided.
100MPa high-performance building structure of the present invention uses the chemical component weight per-cent of mild steel to be: C0.001%～0.0045%, Si≤0.05%, Mn 0.009%～0.048%, Ti 0.011%～0.045%, Als 0.004%～0.070%, surplus is Fe and unavoidable impurities.
Impurity element in the steel according to the invention is controlled at P≤0.015%, S≤0.005%, [N]≤0.0030%, [O]≤0.0020%.
100MPa high-performance building structure of the present invention uses the chemical ingredients of mild steel to be essential characteristic with low C, low Ti content and alloying element simplicity of design.For the intensity that guarantees steel needs the C content more than 0.001%, welding property and the low-temperature flexibility of while in order to guarantee steel, the content of C should not surpass 0.0045%; For the extension property that guarantees that steel grade is higher, the content of Si is controlled at less than 0.05%; The main effect of Mn is solution strengthening and deoxidation, can make intensity too high in the time of too much; It is grain growth when suppressing heating that Ti, Al mainly act on, and plays solid solution and precipitation strength simultaneously, and it is too much that Ti, Al cooperate deoxidation can reduce the increase of intensity, the beneficial effect of enhancing Ti deoxidation products.
The technological process of production of low-yield building structural steel of the present invention is: smelting-continuous casting-steel billet heating-two stage controlled rolling-air coolings-(normalizing).
Smelting technology characteristic of the present invention: carry out hot metal pretreatment, adopt converter smelting, through top blast or top bottom blowing, carry out refining treatment, and carry out microalloying, foreign matter content is in the mentioned component scope in the control steel; According to oxygen level in the molten steel, control ALs content adds the Ti microalloying 0.004%～0.070%; Continuous casting adopts induction stirring to reduce element segregation.
Rolling technology characteristic of the present invention: the operation of rolling adopts the recrystallize controlled rolling process.1100～1280 ℃ of billet heating temperature are controlled at 60～110s/mm heat-up time; Adopt the controlled rolling of two stages, purpose is to control finishing temperature, and control organizes grain fineness number, roughing finishing temperature to be controlled at 950～1080 ℃; Subordinate phase finish rolling start rolling temperature is 900～1050 ℃, and finishing temperature is 820～960 ℃; The rolling accumulation of distortion amount in subordinate phase recrystallization zone is greater than 45%; Roll back steel plate naturally cooling.
For obtaining better effect, the present invention can further carry out 760～920 ℃ of homogenizing thermal treatments to said cooled steel plate.In heat treatment process, adjust the intensity of steel, improve the toughness and the plasticity of steel simultaneously.
The low-yield steel plate for building structure that adopts the present invention to produce has following beneficial effect:
1. the ys fluctuation range is less, is 80～120MPa;
2.-20 ℃ vertical low-temperature flexibility can satisfy the demand of BUILDINGS IN COLD AREAS industry damping design and construction greater than 80J;
3. production technique is simple, and hot rolling attitude air cooling or cooperation normalizing can obtain good template and performance;
4. chemical ingredients is simple, except that fundamental element, and only a small amount of Ti that adds, cost is lower.
Embodiment
Through embodiment the present invention is further described below.
The chemical ingredients of embodiment of the invention steel grade is seen table 1, and the production technique of embodiment of the invention steel is seen table 2, and the service check result of embodiment of the invention steel sees table 3.
The chemical ingredients of table 1, embodiment of the invention steel grade (wt%)
| Embodiment | C | Si | Mn | P | S | Ti | Als | N | [O] |
| 1 | 0.0033 | 0.026 | 0.009 | 0.014 | 0.005 | 0.023 | 0.037 | 0.0026 | 0.0017 |
| 2 | 0.0022 | 0.017 | 0.041 | 0.013 | 0.004 | 0.015 | 0.065 | 0.0022 | 0.0015 |
| 3 | 0.0023 | 0.021 | 0.048 | 0.009 | 0.005 | 0.032 | 0.026 | 0.0022 | 0.0016 |
| 4 | 0.0042 | 0.037 | 0.025 | 0.011 | 0.003 | 0.045 | 0.004 | 0.0029 | 0.0016 |
| 5 | 0.0010 | 0.042 | 0.021 | 0.010 | 0.004 | 0.027 | 0.044 | 0.0017 | 0.0013 |
| 6 | 0.0021 | 0.016 | 0.037 | 0.015 | 0.005 | 0.011 | 0.018 | 0.0019 | 0.0015 |
The processing parameter of table 2, embodiment of the invention steel
The mechanical property of table 3, embodiment of the invention steel
Claims (4)
1. a 100MPa high-performance building structure is used mild steel; The chemical component weight per-cent that it is characterized in that steel is: C 0.001%～0.0045%, Si≤0.05%, Mn 0.009%～0.048%, Ti 0.011%～0.045%, Als 0.004%～0.070%, surplus is Fe and unavoidable impurities.
2. 100MPa high-performance building structure according to claim 1 is used mild steel, it is characterized in that P in the said impurity≤0.015%, S≤0.005%, [N]≤0.0030%, [O]≤0.0020%.
3. claim 1 or 2 said 100MPa high-performance building structures are with the method for manufacture of mild steel; Comprise smelting, continuous casting, steel billet heating and the controlled rolling of two stages; It is characterized in that billet heating temperature is 1100～1280 ℃, be 60～110s/mm heat-up time; Fs roughing finishing temperature is controlled at 950～1080 ℃; Subordinate phase finish rolling start rolling temperature is 900～1050 ℃, and finishing temperature is 820～960 ℃, and the accumulation of distortion amount is greater than 45%; Roll back steel plate naturally cooling.
4. 100MPa high-performance building structure according to claim 3 is characterized in that carrying out 760～920 ℃ homogenizing thermal treatment after the said steel plate cooling with the method for manufacture of mild steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110160102.6A CN102828113B (en) | 2011-06-14 | 2011-06-14 | 100MPa high-performance mild steel for building structure and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110160102.6A CN102828113B (en) | 2011-06-14 | 2011-06-14 | 100MPa high-performance mild steel for building structure and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN102828113A true CN102828113A (en) | 2012-12-19 |
| CN102828113B CN102828113B (en) | 2015-08-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266213A (en) * | 2013-06-11 | 2013-08-28 | 鞍钢股份有限公司 | Production method of ultralow-yield-point anti-seismic steel |
| CN103882300A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | 160MPa high-performance mild steel for building structure and manufacturing method thereof |
| CN106148831A (en) * | 2015-03-28 | 2016-11-23 | 鞍钢股份有限公司 | Steel with ultralow yield point for seismic resistance and production method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10324918A (en) * | 1997-05-26 | 1998-12-08 | Sumitomo Metal Ind Ltd | Manufacture of steel plate of low yield point for structural purpose |
| JPH11172367A (en) * | 1997-12-05 | 1999-06-29 | Nippon Steel Corp | Steel for structural purpose low in yield strength and small in anisotropy of yield strength and its production |
| JP2002012937A (en) * | 2000-06-29 | 2002-01-15 | Nippon Steel Corp | Structural steel low in yield strength and excellent in toughness, and its production method |
| CN101514426A (en) * | 2008-02-21 | 2009-08-26 | 宝山钢铁股份有限公司 | Yield strength 100MPa grade building earthquake-resistance low-yield strength steel and method for producing same |
| CN101748327A (en) * | 2008-12-12 | 2010-06-23 | 鞍钢股份有限公司 | High-performance steel plate for building structure and manufacturing method thereof |
| CN101775542A (en) * | 2010-03-09 | 2010-07-14 | 武汉钢铁(集团)公司 | Quake-proof construction steel with yield strength of 100MPa and production method thereof |
-
2011
- 2011-06-14 CN CN201110160102.6A patent/CN102828113B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10324918A (en) * | 1997-05-26 | 1998-12-08 | Sumitomo Metal Ind Ltd | Manufacture of steel plate of low yield point for structural purpose |
| JPH11172367A (en) * | 1997-12-05 | 1999-06-29 | Nippon Steel Corp | Steel for structural purpose low in yield strength and small in anisotropy of yield strength and its production |
| JP2002012937A (en) * | 2000-06-29 | 2002-01-15 | Nippon Steel Corp | Structural steel low in yield strength and excellent in toughness, and its production method |
| CN101514426A (en) * | 2008-02-21 | 2009-08-26 | 宝山钢铁股份有限公司 | Yield strength 100MPa grade building earthquake-resistance low-yield strength steel and method for producing same |
| CN101748327A (en) * | 2008-12-12 | 2010-06-23 | 鞍钢股份有限公司 | High-performance steel plate for building structure and manufacturing method thereof |
| CN101775542A (en) * | 2010-03-09 | 2010-07-14 | 武汉钢铁(集团)公司 | Quake-proof construction steel with yield strength of 100MPa and production method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882300A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | 160MPa high-performance mild steel for building structure and manufacturing method thereof |
| CN103882300B (en) * | 2012-12-21 | 2016-05-11 | 鞍钢股份有限公司 | 160MPa high-performance mild steel for building structure and manufacturing method thereof |
| CN103266213A (en) * | 2013-06-11 | 2013-08-28 | 鞍钢股份有限公司 | Production method of ultralow-yield-point anti-seismic steel |
| CN106148831A (en) * | 2015-03-28 | 2016-11-23 | 鞍钢股份有限公司 | Steel with ultralow yield point for seismic resistance and production method thereof |
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| CN102828113B (en) | 2015-08-05 |
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