CN104099517B - A kind of manufacture method of 225MPa ranks low-yield building aseismicity steel - Google Patents
A kind of manufacture method of 225MPa ranks low-yield building aseismicity steel Download PDFInfo
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- CN104099517B CN104099517B CN201410335926.6A CN201410335926A CN104099517B CN 104099517 B CN104099517 B CN 104099517B CN 201410335926 A CN201410335926 A CN 201410335926A CN 104099517 B CN104099517 B CN 104099517B
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Abstract
The present invention discloses a kind of manufacture method of 225MPa ranks low-yield building aseismicity steel, and the chemical composition of the steel being related to is by mass percentage：C：≤ 0.03%, Si：≤ 0.1%, Mn：≤ 1%, Al：0.02%～0.06%, P：≤ 0.01%, S：≤ 0.004%, N：≤ 0.004%, Ti：0.01%～0.08%, Nb≤0.05%, remaining is Fe and inevitable impurity.By refine, continuous casting, heating, roughing, electromagnetic induction heating, finish rolling, section cooling, the series of process such as batch so that the yield strength of 225MPa level low-yield building aseismicity steel reaches 200MPa 240MPa levels, elongation percentage>50%, with good plastic deformation and impact flexibility；Cost of alloy is relatively low simultaneously, and technique is easily realized, welding performance and low cycle fatigue property are good.
Description
Technical field
The application is related to steel production technical field, more particularly to a kind of 225MPa ranks low-yield building aseismicity steel
Manufacture method.
Background technology
Low-yield building aseismicity steel is mainly used in building antivibrator, can be effectively protected major bearing structures, reduces
Vibrate the destruction to building.These antishock devices bear seismic (seismal effect prior to body junction component, surrender occur first, by anti-
The delayed absorption seismic energy of multiple load, protects the safety of major structure of construction.Compared with other Energy dissipating materials, with construction letter
List, economy and durability, the advantages of change convenient and highly reliable after shake, can be not only used for the antidetonation of new building, it can also be used to old to build
Build the raising of shock resistance.
Low Yield Point Steel comes from the building aseismicity antivibrator steel of the exploitation nineties in last century, through sending out for decades
Exhibition, the characteristics of defined 100MPa, the trade mark of tri- ranks of 160MPa, 225MPa, its major parameter index, low surrender,
Low tension, high-elongation, high 0 DEG C of impact flexibility, low yield strength ratio, anti-low-cycle fatigue, low work hardening rate, and yield point fluctuation
Narrow range.The chemical composition of original 225MPa ranks mainly with low C, the composition design of Si, Mn, strictly controls N, S, P impurity
Element, adds such as Nb, V, Ti, B etc. and plants alloying element, hot rolled to batch, then obtains through normalizing heat treatment technique.This work
Not only cost of alloy is higher for skill and it is necessary to through heat treatment, increases process costs.
The content of the invention
Invention provides a kind of manufacture method of 225MPa ranks low-yield building aseismicity steel, existing to solve
The higher technical problem of steel production technology cost.
In actual applications, these key performances of low-cycle fatigue, impact flexibility and elongation percentage all with field trash size and
Quantity has substantial connection.The technological improvement that Control and Inclusion Removal is carried out is had：Impurity element is reduced, the amount of inclusions is reduced；Reduce
Slab heating temperature, reduces the formation of fine foreign matter；High temperature coiling, the existing field trash of roughening.It is contemplated that reducing alloy
Content, without Post isothermal treatment, in terms of Control and Inclusion Removal solves technique contradiction using electromagnetic induction heating technology, obtains performance
Stablize the low surrender construction(al)steel of qualified 225MPa ranks.
In specific application, the invention provides a kind of manufacturer of 225MPa ranks low-yield building aseismicity steel
Method, its chemical composition is by mass percentage：C：≤ 0.03%, Si：≤ 0.1%, Mn：≤ 1%, Al：0.02%～
0.06%, P：≤ 0.01%, S：≤ 0.004%, N：≤ 0.004%, Ti：0.01%～0.08%, Nb≤0.05%, remaining is
Fe and inevitable impurity；The technological process of the 225MPa levels low-yield building aseismicity steel includes：Molten steel is by essence
After refining, continuous casting obtains slab；The slab is heated；Carry out roughing；By electromagnetic induction heating；Finish rolling is carried out, to obtain
Obtain hot rolled plate；The hot rolled plate is carried out into section cooling；The hot rolled plate is coiled into into hot rolled coil, wherein, the hot rolled coil
Rolling total deformation is more than 80%.
Preferably, it is described that the slab is heated, specially：By the heating of plate blank to 1100 DEG C～1150 DEG C.
Preferably, it is described by electromagnetic induction heating, specially：By electromagnetic induction heating to 1050 DEG C～1100 DEG C.
Preferably, the start rolling temperature of the finish rolling is more than 1000 DEG C.
Preferably, the finishing temperature of the finish rolling is 880 DEG C～950 DEG C.
Preferably, the coiling temperature is 680 DEG C～750 DEG C.
Preferably, it is described the hot rolled plate is coiled into into hot rolled coil after, methods described also includes：By the hot rolled coil
Burial pit is sent into, to be slowly cooled to room temperature.
About the explanation of composition and technique：
C solution strengthening, improves yield strength, reduces elongation percentage；Control is below 0.03%.
Si is deoxidant element, the solution strengthening in steel, is controlled below 0.01%.
Mn conventional solution strengthening element, improves yield strength, controls below 1%.
P easily makes steel become fragile, and affects toughness, controls below 0.01%.
S affects the low-temperature flexibility of steel, controls below 0.004%.
The N of N solid solutions can improve intensity, control below 0.004%.
Al deoxidations must element, while AlN can be formed be mingled with, improve intensity, control in 0.01%-0.06%.
Ti is easily combined with C, N, forms the non-metallic inclusion of Ti (C, N), and appropriate Ti can reduce the C of free state, and N is former
Son, so as to reduce intensity.Add very little, do not have the effect of solid C, N, add excessive easily dispersion-strengtherning, improve intensity.So
Control is in 0.01%-0.08%.The roughening of field trash simultaneously can effectively reduce its pinning effect to crystal boundary, reduce intensity,
Improve elongation percentage.
Nb has solid C, N effect, and appropriate addition can form uniform thick Nb (C, N), to reduce its shadow to yield strength
Ring, addition is excessive, and invigoration effect is obvious.Addition scope control is below 0.03%.
By one or more technical scheme of the present invention, beneficial effects of the present invention are as follows：
The present invention provides a kind of manufacture method of 225MPa ranks low-yield building aseismicity steel, the chemistry of the steel being related to
Composition is by mass percentage：C：≤ 0.03%, Si：≤ 0.1%, Mn：≤ 1%, Al：0.02%～0.06%, P：≤
0.01%, S：≤ 0.004%, N：≤ 0.004%, Ti：0.01%～0.08%, Nb≤0.05%, remaining is Fe and can not keep away
The impurity exempted from.By refine, continuous casting, heating, roughing, electromagnetic induction heating, finish rolling, section cooling, the series of process such as batch,
So that the yield strength of 225MPa level low-yield building aseismicity steel reaches 200MPa-240MPa levels, elongation percentage>50%, tool
There are good plastic deformation and impact flexibility；Simultaneously cost of alloy is relatively low, and technique is easily realized, welding performance and low-cycle fatigue
Can be good.
In addition, the electromagnetic induction heating technique that the present invention is adopted, can improve temperature, within a short period of time to rhythm of production
Impact it is less, solve low temperature heating of plate blank well and the contradiction between high-temperature final rolling is batched, and have in terms of the two
It is roughened beneficial to field trash, ferrite is grown up, so as to reduce intensity, improves elongation percentage.
Description of the drawings
Fig. 1 is the process chart of 2250MPa levels low-yield building aseismicity steel provided in an embodiment of the present invention.
Specific embodiment
In order that the application the technical staff in the technical field is more clearly understood that the application, below in conjunction with the accompanying drawings,
Technical scheme is described in detail by specific embodiment.
Embodiment 1：
The manufacture method of 225MPa levels low-yield building aseismicity steel according to the present invention, the chemical composition of the steel being related to
It is by mass percentage：
C：≤ 0.03%, Si：≤ 0.1%, Mn：≤ 1%, Al：0.02%～0.06%, P：≤ 0.01%, S：≤
0.004%, N：≤ 0.004%, Ti：0.01%～0.08%, Nb≤0.05%, remaining is Fe and inevitable impurity.
Preferably, Fig. 1 is refer to below, and the technological process of the 225MPa levels low-yield building aseismicity steel (is made
Make method) include：
S101, molten steel continuous casting after refine obtain slab.
S102, heats to the slab.
Preferably, it is described that the slab is heated, specially：By the heating of plate blank to 1100 DEG C～1150 DEG C.
S103, carries out roughing.
S104, by electromagnetic induction heating.
Preferably, it is described by electromagnetic induction heating, specially：By electromagnetic induction heating to 1050 DEG C～1100 DEG C.
S105, carries out finish rolling, to obtain hot rolled plate.
Preferably, the start rolling temperature of the finish rolling is more than 1000 DEG C.
Preferably, the finishing temperature of the finish rolling is 880 DEG C～950 DEG C.The hot rolled plate is carried out laminar flow cold by S106
But.
The hot rolled plate is coiled into hot rolled coil by S107.Wherein, the rolling total deformation of the hot rolled coil is more than 80%.
Preferably, the coiling temperature is 680 DEG C～750 DEG C.
Preferably, it is described the hot rolled plate is coiled into into hot rolled coil after, methods described also includes：By the hot rolled coil
Burial pit is sent into, to be slowly cooled to room temperature.
In actual applications, according to the slab obtained after continuous casting (i.e.：Continuous casting billet) chemical composition it is different, with different
Processing technology, refer to table 1 below, be the main chemical compositions table (%) of continuous casting billet.
Table 1
| Continuous casting billet species | C | Si | Mn | P | S | Als | N | Ti | Nb |
| A-1 | 0.015 | 0.008 | 0.37 | 0.007 | 0.0025 | 0.054 | 0.0028 | 0.013 | 0.023 |
| A-2 | 0.011 | 0.003 | 0.62 | 0.003 | 0.0032 | 0.035 | 0.0034 | 0.021 | 0.013 |
| A-3 | 0.013 | 0.004 | 0.85 | 0.005 | 0.0034 | 0.043 | 0.0024 | 0.015 | 0.03 |
According to the chemical composition of table 1, with process is implemented as follows：
The preparation process of A-1 is as follows：
(1) continuous casting billet of A-1 is sent into into heating stove heat, 1150 DEG C of heating-up temperature.
(2) roughing is carried out after heating, after roughing, Jing electromagnetism is heated rapidly to 1080 DEG C.
(3) finish rolling is carried out, finish rolling start rolling temperature is 1010 DEG C, and finishing temperature is 880 DEG C.
(4) carry out section cooling.
(5) hot rolled coil is coiled into, coiling temperature is 680 DEG C, is then placed in burial pit and is cooled to room temperature, wherein, hot rolled plate
Total reduction>80%, the thickness of hot rolled plate is 6mm.
The preparation process of A-2 is as follows：
(1) continuous casting billet of A-2 is sent into into heating stove heat, 1130 DEG C of heating-up temperature.
(2) roughing is carried out after heating, after roughing, Jing electromagnetism is heated rapidly to 1090 DEG C.
(3) finish rolling is carried out, finish rolling start rolling temperature is 1020 DEG C, and finishing temperature is 900 DEG C.
(4) carry out section cooling.
(5) hot rolled coil is coiled into, coiling temperature is 700 DEG C, is then placed in burial pit and is cooled to room temperature, wherein, hot rolled plate
Total reduction>80%, the thickness of hot rolled plate is 15mm.
The preparation process of A-3 is as follows：
(1) continuous casting billet of A-3 is sent into into heating stove heat, 1120 DEG C of heating-up temperature.
(2) roughing is carried out after heating, after roughing, Jing electromagnetism is heated rapidly to 1060 DEG C.
(3) finish rolling is carried out, finish rolling start rolling temperature is 1040 DEG C, and finishing temperature is 930 DEG C.
(4) carry out section cooling.
(5) hot rolled coil is coiled into, coiling temperature is 730 DEG C, is then placed in burial pit and is cooled to room temperature, wherein, hot rolled plate
Total reduction>80%, the thickness of hot rolled plate is 20mm.
Mechanical property measurement is carried out to the finished product of above-mentioned three groups of continuous casting billets, 2 are shown in Table, is the mechanics of the finished product of three groups of continuous casting billets
Performance table.
Table 2
By one or more embodiment of the present invention, beneficial effects of the present invention are as follows：
The present invention provides a kind of manufacture method of 225MPa ranks low-yield building aseismicity steel, the chemistry of the steel being related to
Composition is by mass percentage：C：≤ 0.03%, Si：≤ 0.1%, Mn：≤ 1%, Al：0.02%～0.06%, P：≤
0.01%, S：≤ 0.004%, N：≤ 0.004%, Ti：0.01%～0.08%, Nb≤0.05%, remaining is Fe and can not keep away
The impurity exempted from.By refine, continuous casting, heating, roughing, electromagnetic induction heating, finish rolling, section cooling, the series of process such as batch,
So that the yield strength of 225MPa level low-yield building aseismicity steel reaches 200MPa-240MPa levels, elongation percentage>50%, tool
There are good plastic deformation and impact flexibility；Simultaneously cost of alloy is relatively low, and technique is easily realized, welding performance and low-cycle fatigue
Can be good.
In addition, the electromagnetic induction heating technique that the present invention is adopted, can improve temperature, within a short period of time to rhythm of production
Impact it is less, solve low temperature heating of plate blank well and the contradiction between high-temperature final rolling is batched, and have in terms of the two
It is roughened beneficial to field trash, ferrite is grown up, so as to reduce intensity, improves elongation percentage.
Although having been described for the preferred embodiment of the application, one of ordinary skilled in the art once knows substantially
Creative concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to bag
Include preferred embodiment and fall into the had altered of the application scope and change.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising these changes and modification.
Claims (4)
1. a kind of manufacture method of 225MPa ranks low-yield building aseismicity steel, it is characterised in that the 225MPa ranks
The chemical composition of low-yield building aseismicity steel is by mass percentage：C：≤ 0.03%, Si：≤ 0.1%, Mn：≤
1%, Al：0.054%～0.06%, P：≤ 0.01%, S：≤ 0.0025%, N：≤ 0.004%, Ti：0.013%～
0.08%, Nb≤0.05%, remaining is Fe and inevitable impurity；
The technological process of the 225MPa levels low-yield building aseismicity steel includes：
After refine, continuous casting obtains slab to molten steel；
To the heating of plate blank to 1100 DEG C～1150 DEG C；
Carry out roughing；
By electromagnetic induction heating to 1050 DEG C～1100 DEG C；
Finish rolling is carried out, to obtain hot rolled plate, the start rolling temperature of the finish rolling is more than 1000 DEG C；
The hot rolled plate is carried out into section cooling；
The hot rolled plate is coiled into into hot rolled coil, wherein, the rolling total deformation of the hot rolled coil is more than 80%.
2. the manufacture method of 225MPa ranks low-yield building aseismicity steel according to claim 1, it is characterised in that
The finishing temperature of the finish rolling is 880 DEG C～950 DEG C.
3. the manufacture method of 225MPa ranks low-yield building aseismicity steel according to claim 1, it is characterised in that
The coiling temperature is 680 DEG C～750 DEG C.
4. the manufacture method of 225MPa ranks low-yield building aseismicity steel according to claim 1, it is characterised in that
It is described the hot rolled plate is coiled into into hot rolled coil after, methods described also includes：
The hot rolled coil is sent into into burial pit, to be slowly cooled to room temperature.
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| CN201410335926.6A CN104099517B (en) | 2014-07-15 | 2014-07-15 | A kind of manufacture method of 225MPa ranks low-yield building aseismicity steel |
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| CN106148831B (en) * | 2015-03-28 | 2017-12-05 | 鞍钢股份有限公司 | Steel with ultralow yield point for seismic resistance and production method thereof |
| CN105420606B (en) * | 2015-12-14 | 2017-11-21 | 武汉钢铁有限公司 | Yield strength 550MPa grade high-strength high-tenacities hot rolling yoke steel and production method |
| CN107574296B (en) * | 2017-09-23 | 2019-03-19 | 武钢集团昆明钢铁股份有限公司 | A kind of 225MPa grades of low-yield point damper steel plates of low cost and strip production methods |
| CN107574387B (en) * | 2017-09-23 | 2019-07-16 | 武钢集团昆明钢铁股份有限公司 | A kind of 225MPa grades of weather-proof low-yield point damper steel plate and strip production methods |
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| CN1225561C (en) * | 2003-07-08 | 2005-11-02 | 东北大学 | Production method of low yield strength ratio refactory hot continuously-rolled strip for building |
| CN101775536A (en) * | 2009-01-13 | 2010-07-14 | 宝山钢铁股份有限公司 | 225MPa earthquake-proof low yield strength steel and manufacturing method thereof |
| CN101781736B (en) * | 2010-03-09 | 2011-06-29 | 武汉钢铁(集团)公司 | Yield strength 225MPa-level earthquake-resistant construction steel and production method thereof |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
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