CN106636948A - Anti-seismic structural steel with yield strength being 550MPa grade, and production method thereof - Google Patents
Anti-seismic structural steel with yield strength being 550MPa grade, and production method thereof Download PDFInfo
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- CN106636948A CN106636948A CN201610867422.8A CN201610867422A CN106636948A CN 106636948 A CN106636948 A CN 106636948A CN 201610867422 A CN201610867422 A CN 201610867422A CN 106636948 A CN106636948 A CN 106636948A
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- yield strength
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- seismic structure
- structure steel
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
-
- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
-
- 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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to an anti-seismic structural steel with the yield strength being 550MPa grade, and a production method thereof. The anti-seismic structural steel contains the following components in percentage by weight: 0.12 to 0.22 percent of carbon, 0.20 to 0.60 percent of silicon, 1.00 to 1.60 percent of manganese, 0.05 to 0.15 percent of aluminum, 0.20 to 0.60 percent of chromium, and the balance ferrum and impurities. According to the anti-seismic structural steel with the yield strength being 550MPa grade, and the production method thereof provided by the invention, thermal mechanical control processing (TMCP) is carried out based on metallurgy processes such as recrystallization and phase change, and hardening treatments such as solution strengthening, precipitation strengthening, dislocation strengthening and grain refining are completed under the specified deformation and temperature conditions, so that the performance of a steel plate at a rolling state can be optimized.
Description
Technical field
The present invention relates to High-Strength Low-Alloy rolling controlled and cooling controlled steel, is mainly used in the life of anti-seismic structure steel plate, coil of strip and shaped steel
Produce, and in particular to a kind of yield strength 550MPa level anti-seismic structure steel and its production method.
Background technology
Aseismic Design mainly reduces infringement of the earthquake to building structure by reasonable distribution stress.Traditional anti-shock methods
It is that seismic energy antidetonation is absorbed by the deformation of the structural members such as post beam and supporting member, can so causes structural elements to occur damaging
Even collapse.Different from traditional anti-shock methods, the antidetonation that consumes energy in recent years becomes antidetonation new technology and is developed.Low Yield Point Steel
It is the making material of power consumption damped part in power consumption Aseismic Design.The power consumption damping shock proof part occurs to bend prior to other structures part
Clothes, into elastoplasticity and mecystasis, intensively absorb and dissipation seismic energy, the dynamic respons of attenuating structure, so as to protect
The safety of agent structure and building.Although significantly, also many problems require study and solve the technical progress.Such as：
(1) mild steel damper is in the case where shaking strongly, and need to install sufficient amount and just can work.
(2) mild steel damper operationally deforms accumulation, makes steel hardening serious and local buckling, causes the earthquake of structure
Reaction and design grave fault.
In recent years, transformation induced plasticity steel TRIP obtains tremendous development, but until current, is still mainly used in automobile
Industry.Used as automobile steel, TRIP steel is mainly used as anti-collision striker and uses, in collision scenario by being plastically deformed reinforcing
To absorb the energy produced by collision in a large number to protect driver and crew.Can be replaced with the anti-seismic structure steel that the thinking of TRIP steel is developed
It is used as structural member and the supporting members such as post beam for the carbons such as commonly used Q235, Q345, Q460 and low-alloy structural steel, and
Low yield strength and the collaboration of extremely low yield strength steel absorb seismic energy to play function of seismic resistance.
The content of the invention
For above prior art problem, it is an object of the invention to provide a kind of yield strength 550MPa level anti-seismic structure
Steel and its production method, with reference to the principle of TRIP Steel, there is provided new selection setting for anti-seismic structure steel
Meter and production.The topmost characteristic of anti-seismic structure steel is that its stretcher strain curve is dome-shaped, the no remarkable yield platform of circle, is in
Continuous yield characteristics, the ability with very strong deformation and absorption earthquake pounding energy.As tradition belonging to GB700 and GB1591
The replacement of steel, cooperates with low surrender mild steel damper energy consumption type antiseismic structure system, for load-bearing structural member production, can be more
Effectively damping.Concrete technical scheme is as follows：
A kind of yield strength 550MPa level anti-seismic structure steel, contains according to percentage by weight：Carbon 0.12～0.22%, silicon：
0.20～0.60%, manganese：1.00～1.60%, aluminium：0.05～0.15%, chromium 0.20～0.60%, balance of iron and impurity.
Further, also containing copper 0.20～0.40%.
Further, contain according to percentage by weight：Carbon 0.12%, silicon：0.32%, manganese：1.37%, aluminium：0.073%,
Chromium 0.34%, balance of iron and impurity.
The production method of above-mentioned yield strength 550MPa level anti-seismic structure steel, comprises the steps：
(1) prepare according to component and proportioning；
(2) smelt；
(3) cast；
(4) reheat；
(5) roughing and finish rolling；
(6) section cooling.
Further, comprise the steps：In austenite recrystallization area and Unhydrated cement multiple tracks secondary control in step (5)
Rolling, including：
(5-1) heat at 1180～1250 DEG C；
(5-2) 950～1050 DEG C complete breaking down；
(5-3) 920 DEG C～820 DEG C complete finish rolling；
(5-4) 600 DEG C～450 DEG C complete quick cooling.
Further, roughing and finish rolling are completed into two frame Experimental Rolling Mills in step (5).
Further, thickness specification 9.0mm anti-seismic structure steel band is obtained after step (6) cooling.
Further, cooling velocity is more than 15 DEG C/S in step (6).
Compared with currently available technology, thermo-mechanical rolling (TMCP) of the present invention is to be with metallurgical technologies such as recrystallization, phase transformations
Basis, completes at the hardening such as solution strengthening, precipitation strength, dislocation strengthening and crystal grain refinement under the deformation of regulation and temperature conditionss
Reason, so that as-rolled condition plate property reaches optimization.To economize on resources, the addition of alloying element is reduced, obtain intensity
With the Proper Match of toughness, rolling and the cooling capacity of seven frame hot tandems are given full play to, shock resisting steel adopts controlled rolling
Produce with the mode for accelerating to cool down, it passes through high temperature austenite area Deformation recrystallization, the deformation of low temperature austenite Unhydrated cement
And the acceleration after rolling cools down to obtain optimum efficiency.Specifically：
1) shock resisting steel of the invention has the plastic deformation ability of high intensity, protrusion, and stress strain curve is dome-shaped in circle, has
Continuous surrender.
2) antidetonation steel microscopic structure of the invention is uniform, without obvious preferred orientation.
3) combination property of shock resisting steel of the invention：ReL：550～600MPa, Rm：650～700MPa, Rt0.5/Rm≤
0.85, homogeneous deformation elongation UEL >=6%.
Description of the drawings
Fig. 1 is the first metallographic structure；
Fig. 2 is second metallographic structure；
Fig. 3 is stress strain curve figure.
Specific embodiment
Describe the present invention below according to accompanying drawing, it is a kind of preferred reality in numerous embodiments of the present invention
Apply example.
In a preferred embodiment, under TMCP process systems, by rational composition design, controlled rolling and control
Cooling obtains the heterogeneous structure based on tiny bainite or ' bainite+voxel volume ' so as to while high intensity also
With prominent plastic deformation ability, it is mainly used in the manufacture of anti-seismic structure part.
This patent designs the main thought of anti-seismic structure steel：First, widely used alloy relatively cheap using price
Element, produces and uses with being easy to large-scale low-cost, in addition to C, Mn, essential element use Cr and Al, not including or it is not intentional
The elements such as addition Nb, V, Ti, Mo, Ni；Second, design rolling, cooling technique lay particular stress on phase-change organization's intensifying method, obtain with shellfish
Microscopic structure based on family name's body or ' bainite+ferrite ', while improving intensity and plasticity；3rd, rationally reduce S by smelting
With the content of P, reduce manganese sulfide inclusion to improve toughness properties.
The chemical composition of shock resisting steel is：
Carbon 0.12～0.22%；Silicon：0.20～0.60%；Manganese：1.00～1.60%；Aluminium：0.05～0.15%；Chromium 0.20
～0.60%；
Can select to add copper：0.20～0.40%；
Iron and trace impurity：Surplus.
The cooling controlling and rolling controlling process system of shock resisting steel is：
1. rolling pass distribution：In austenite recrystallization area and Unhydrated cement multi-pass controlled rolling, (1180～1250
DEG C) -950～1050 DEG C of heating completes breaking down-(920 DEG C～820 DEG C) and complete finish rolling-(600 DEG C～450 DEG C) to complete quickly
Cooling.
2. the type of cooling：Cooling velocity is more than 15 DEG C/S.
In a further advantageous embodiment, according to the chemical composition ranges of shock resisting steel of the present invention, Jing smelts, casting, then adds
After heat, into two frame Experimental Rolling Mills roughing and finish rolling are completed.Jing section coolings after rolling, obtain thickness specification 9.0mm antidetonation knot
Structure steel band.
Antidetonation steel chemical composition is shown in Table 1, TMCP process systems and is shown in Table 2, and mechanical performance is shown in Table 3, and microscopic structure is shown in Fig. 1 and Tu
2, stress strain curve is shown in Fig. 3.
The chemical composition (%) of the embodiment anti-seismic structure steel SM555 of table 1.
| The trade mark | C | Si | Mn | P | S | Als | Cr |
| SM555 | 0.12 | 0.32 | 1.37 | 0.010 | 0.002 | 0.073 | 0.34 |
The TMCP process systems of table 2.
| Grade of steel | Heating-up temperature/DEG C | Roughing finishing temperature/DEG C | Entry temperature at finishing/DEG C | Finishing temperature/DEG C | Coiling temperature/DEG C | Cooling rate/DEG C/s |
| SM555 | 1200 | 1020 | 1000 | 830 | 500 | 15-30 |
The anti-seismic structure steel SM555 mechanical properties test results of table 3
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that the present invention is implemented and do not receive aforesaid way
Restriction, as long as employing method of the present invention design and the various improvement that carry out of technical scheme, or not improved direct application
In other occasions, within protection scope of the present invention.
Claims (8)
1. a kind of yield strength 550MPa level anti-seismic structure steel, it is characterised in that contain according to percentage by weight：Carbon 0.12～
0.22%, silicon：0.20～0.60%, manganese：1.00～1.60%, aluminium：0.05～0.15%, chromium 0.20～0.60% is balance of
Iron and impurity.
2. yield strength 550MPa level anti-seismic structure steel as claimed in claim 1, it is characterised in that also containing copper 0.20～
0.40%.
3. yield strength 550MPa level anti-seismic structure steel as claimed in claim 1, it is characterised in that contain according to percentage by weight
Have：Carbon 0.12%, silicon：0.32%, manganese：1.37%, aluminium：0.073%, chromium 0.34%, balance of iron and impurity.
4. as described in claim 1-3 yield strength 550MPa level anti-seismic structure steel production method, it is characterised in that include as
Lower step：
(1) carry out component according to one in claim 1-3 and proportioning prepares；
(2) smelt；
(3) cast；
(4) reheat；
(5) roughing and finish rolling；
(6) section cooling.
5. the production method of yield strength 550MPa level anti-seismic structure steel as claimed in claim 4, it is characterised in that including as follows
Step：In austenite recrystallization area and Unhydrated cement multi-pass controlled rolling in step (5), including：
(5-1) heat at 1180～1250 DEG C；
(5-2) 950～1050 DEG C complete breaking down；
(5-3) 920 DEG C～820 DEG C complete finish rolling；
(5-4) 600 DEG C～450 DEG C complete quick cooling.
6. as described in claim 4 or 5 yield strength 550MPa level anti-seismic structure steel production method, it is characterised in that step
(5) roughing and finish rolling are completed into two frame Experimental Rolling Mills in.
7. as described in claim 4-6 yield strength 550MPa level anti-seismic structure steel production method, it is characterised in that step
(6) thickness specification 9.0mm anti-seismic structure steel band is obtained after cooling down.
8. as described in claim 4-7 yield strength 550MPa level anti-seismic structure steel production method, it is characterised in that step
(6) cooling velocity is more than 15 DEG C/S in.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867422.8A CN106636948A (en) | 2016-09-29 | 2016-09-29 | Anti-seismic structural steel with yield strength being 550MPa grade, and production method thereof |
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| CN201610867422.8A CN106636948A (en) | 2016-09-29 | 2016-09-29 | Anti-seismic structural steel with yield strength being 550MPa grade, and production method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008261046A (en) * | 2007-03-19 | 2008-10-30 | Kobe Steel Ltd | High-tensile steel excellent in weldability and plastic deformability, and cold-formed steel pipe formed therefrom |
| CN101497969A (en) * | 2009-03-13 | 2009-08-05 | 武汉钢铁(集团)公司 | High-performance weather-resisting anti-seismic steel for building and production method thereof |
| CN101705423A (en) * | 2009-11-25 | 2010-05-12 | 首钢总公司 | Low-cost steel plate for building structure and manufacturing method thereof |
| CN102676919A (en) * | 2012-04-17 | 2012-09-19 | 马钢(集团)控股有限公司 | Method for cooling low-alloy hot-rolled H-shaped steel with yield strength of 550MPa after rolling |
| CN104451410A (en) * | 2014-12-18 | 2015-03-25 | 马钢(集团)控股有限公司 | Steel for 600MPa-level high-strength steel bars and thermal mechanical rolling method thereof |
-
2016
- 2016-09-29 CN CN201610867422.8A patent/CN106636948A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008261046A (en) * | 2007-03-19 | 2008-10-30 | Kobe Steel Ltd | High-tensile steel excellent in weldability and plastic deformability, and cold-formed steel pipe formed therefrom |
| CN101497969A (en) * | 2009-03-13 | 2009-08-05 | 武汉钢铁(集团)公司 | High-performance weather-resisting anti-seismic steel for building and production method thereof |
| CN101705423A (en) * | 2009-11-25 | 2010-05-12 | 首钢总公司 | Low-cost steel plate for building structure and manufacturing method thereof |
| CN102676919A (en) * | 2012-04-17 | 2012-09-19 | 马钢(集团)控股有限公司 | Method for cooling low-alloy hot-rolled H-shaped steel with yield strength of 550MPa after rolling |
| CN104451410A (en) * | 2014-12-18 | 2015-03-25 | 马钢(集团)控股有限公司 | Steel for 600MPa-level high-strength steel bars and thermal mechanical rolling method thereof |
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Application publication date: 20170510 |