CN107099750A - A kind of high intensity Q630GJ steel plates and its production method - Google Patents
A kind of high intensity Q630GJ steel plates and its production method Download PDFInfo
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- CN107099750A CN107099750A CN201710266636.4A CN201710266636A CN107099750A CN 107099750 A CN107099750 A CN 107099750A CN 201710266636 A CN201710266636 A CN 201710266636A CN 107099750 A CN107099750 A CN 107099750A
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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
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
-
- 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
-
- 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
- C21D2211/008—Martensite
Abstract
The invention discloses a kind of high intensity Q630GJ steel plates and its production method, the steel plate uses V Ni Nb Ti microalloy composition designs, and the microalloy chemical composition and weight/mass percentage composition are：V：0.04~0.045%, Ni：0.35~0.45%, Nb：0.02~0.03%, Ti：0.015~0.025%.Production method includes rolling process and heat treatment step.The present invention passes through rational composition design, controlled rolling and controlled cooling and lonneal technique, the high strength steel plate of excellent mechanical performances is obtained, steel plate is organized as being tempered ferrite+martensite+bainite, yield tensile ratio≤0.83, steel plate maximum gauge is 80mm, realizes the production domesticization of quenching and tempering type low yield strength ratio high-strength steel sheet.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of high intensity Q630GJ steel plates and its production method.
Background technology
With increasing, the fast development of steel frame construction building of domestic large-scale tall buildings, high-strength building is utilized
Steel consumption can be greatly lowered with steel, the positive high intensity of steel plate for building, high-performance, maximization direction are developed.High-level building
In short supply with steel domestic market, in short supply, import steel price is universal higher.Under this economic conditions, need of the market to Gao Jiangang
Ask and be continuously increased, and higher requirement is all proposed in intensity and in toughness.External such as nippon JFE, Kobe Steel
Superhigh intensity anti-seismic steel for building plate HT780 has been developed Deng company.
The construction(al)steel national standard of China's reality row《GB/T 19879-2005 steel plate for building structure》The middle superlative degree
Wei not Q460GJ.It can be seen that, the Gao Jiangang that China now produces far can not meet the demand in market.At present, the new national standard of country is begged for
By original text added Q490GJ, Q540GJ, Q580GJ and Q630GJ high-strength building steel trade mark, it is seen that develop and produce and be high-strength
Spend building iron very necessary.
Publication No. CN105132826A Chinese patent discloses think gauge low yield strength ratio high-strength building structural steel
And preparation method thereof, it adds a variety of microalloy elements on composition（V、Cr、Mo、Ti、Nb、Ni、Cu、B）To ensure steel
Intensity and toughness, relatively increase the production cost of steel plate, what the production technology of this high energy consumption produced choice goods in minimizing
It is not dominant in steel market, and Technology for Heating Processing performs quenching+tempering, and complex process, the cycle is long, and cost is high.
Publication No. CN105950849A Chinese patent discloses a kind of life of low yield strength ratio 690MPa grades of high strength steel plates
Production. art, the patent is designed using Cu-Ni-Mo-Cr microalloys composite parts, develops the 690MPa level steel of 40-70mm thickness
Plate.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high intensity Q630GJ steel plates and its production method；By closing
The composition design and controlled rolling and controlled cooling of reason and the production technology of heat treatment, obtain uniformly being tempered ferrite+martensite+bainite,
It ensure that steel plate has favorable comprehensive mechanical property and welding performance, obtain low yield strength ratio and high intensity, production cost is low, city
The field strong steel plate of competitiveness.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of high intensity Q630GJ steel plates, it is described
Steel plate uses V-Ni-Nb-Ti microalloy composition designs, and the microalloy chemical composition and weight/mass percentage composition are：V：0.04~
0.045%, Ni：0.35~0.45%, Nb：0.02~0.03%, Ti：0.015~0.025%.
Steel plate chemical composition composition and weight/mass percentage composition of the present invention are：C≤0.18%, Si≤0.60%, Mn≤
1.70%, P≤0.020%, S≤0.010%, Alt：0.015-0.050%, V：0.04~0.045%, Ni：0.35~0.45%, Nb：
0.02~0.03%, Ti：0.015~0.025%, surplus is Fe and micro inevitable impurity.
Steel plate thickness≤80mm of the present invention.
Steel plate of the present invention is organized as being tempered ferrite+martensite+bainite, yield tensile ratio≤0.83.
Present invention also offers a kind of production method of high intensity Q630GJ steel plates, the production method includes rolling process
And heat treatment step.
Rolling process of the present invention, using II type controlled rolling process, I-stage ensures axial rolling on earth, and it is 30 to add up drafts
~40%, the steel thickness that dries in the air is H+70mm, and the H is finished steel plate thickness, and unit is mm.
Rolling process of the present invention, II 860~900 DEG C of stage start rolling temperature, 780~820 DEG C of finishing temperature.
Rolling process of the present invention, rolls rear steel plate and enters ACC and quickly cool down, 500~550 DEG C of red temperature.
Heat treatment step of the present invention, carries out temper, 200~260 DEG C of tempering heating-up temperature, total heat time
1.5min/mm × H, the H are finished steel plate thickness, and unit is mm.
Mentality of designing of the present invention：
1st, the present invention uses V-Ni-Nb-Ti microalloy element complex intensifyings, by rational controlled rolling and Technology for Heating Processing, obtains
Good obdurability matching, while not reducing the welding performance of steel plate again；Wherein V element and O, N have very big affinity, are
Carbide, deoxidation, degassing beneficial to steel, makes steel obtain fine and close fine grained texture, improves intensity, its impact property is all
High compared with without V steel, the high degree of dispersion of vanadium carbide prevents weld grain thick in addition, can improve the weldability of steel；Ni elements are played
Improve the effect of plasticity and low-temperature flexibility；Ti elements are strong deoxidiers in steel, and it can make the dense internal organization of steel, and refinement is brilliant
Grain, improves the intensity and toughness of steel, and is acted on S, reduces the hot-short effect of sulphur；Nb is strong solution strengthening element, is increased back
Fiery stability, improves intensity and impact flexibility, and Nb-Ti recombination energies prevent intercrystalline corrosion.
2nd, the present invention uses II type controlled rolling process, is controlled by the high start rolling temperature of non-recrystallization zone and low red temperature,
Crystal grain thinning, improves armor plate strength.
3rd, the present invention is chosen at 200~260 DEG C and lonneal processing, steel sheet interior tissue, reduction is carried out to steel plate
The residual stress and fragility of state tissue are rolled, makes to obtain tempered martensite after tempering, to obtain good comprehensive mechanical property.
High intensity Q630GJ steel plates detection method refers to the related rule in GB/T 19879-2005 steel plate for building structure
It is fixed.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, the present invention is micro- by rational V-Ni-Nb-Ti systems
Alloy element component design, controlled rolling and controlled cooling and lonneal technique, obtain the high intensity Q630GJ steel plates of excellent mechanical performances, steel
Plate is organized as being tempered ferrite+martensite+bainite, and yield tensile ratio≤0.83, steel plate maximum gauge is 80mm, realizes that quenching and tempering type is low
Yield tensile ratio high-strength steel sheet domesticizes.2nd, the every mechanical performance index for obtaining technical conditions requirement is reduced and is produced into again
This, meets the demand of domestic large-scale high-level construction market steel using amount.3rd, high intensity Q630GJ steel plates surrender produced by the invention
- 40 DEG C of transverse direction low-temperature impact toughness >=150J at intensity >=690MPa, tensile strength >=840MPa, thickness of slab 1/4.
Brief description of the drawings
Fig. 1 is the micro-organization chart of 10mm steel plates in the embodiment of the present invention 1；
Fig. 2 is the micro-organization chart of 30mm steel plates in the embodiment of the present invention 2；
Fig. 3 is the micro-organization chart of 50mm steel plates in the embodiment of the present invention 3；
Fig. 4 is the micro-organization chart of 80mm steel plates in the embodiment of the present invention 4；
Fig. 5 is the micro-organization chart of 60mm steel plates in the embodiment of the present invention 5.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
The present embodiment high intensity Q630GJ steel plate thickness is 10mm, using V-Ni-Nb-Ti microalloy composition designs, its chemistry into
It is grouped into and weight/mass percentage composition is：C：0.07%, Si：0.20%, Mn：1.40%, P：0.012%, S：0.005%, Alt：
0.015%, V：0.040%, Ni：0.40%, Nb：0.02%, Ti：0.025%, surplus is Fe and micro inevitable impurity.
The present embodiment high intensity Q630GJ Plate Productions technique includes rolling and is heat-treated, and comprises the following steps that：
（1）Rolling mill practice：Using II type controlled rolling process, I-stage adds up drafts up to 40%, and the steel thickness that dries in the air is 80mm；The II stages open
Roll 900 DEG C of temperature, 780 DEG C of finishing temperature rolls rear steel plate and enters ACC and quickly cools down, 500 DEG C of red temperature.
（2）Technology for Heating Processing：Temper is carried out to steel plate, tempering heating-up temperature is 200 DEG C, and total heat time is
15min。
The mechanical property and microstructure of gained steel plate are shown in Table 1；Microscopic structure is shown in Fig. 1.
Embodiment 2
The present embodiment high intensity Q630GJ steel plate thickness is 30mm, using V-Ni-Nb-Ti microalloy composition designs, its chemistry into
It is grouped into and weight/mass percentage composition is：C：0.10%, Si：0.30%, Mn：1.45%, P：0.010%, S：0.010%, Alt：
0.045%, V：0.041%, Ni：0.45%, Nb：0.025%, Ti：0.015%, surplus is Fe and micro inevitable impurity.
The present embodiment high intensity Q630GJ Plate Productions technique includes rolling and is heat-treated, and comprises the following steps that：
（1）Rolling mill practice：Using II type controlled rolling process, I-stage adds up drafts up to 35%, and the steel thickness that dries in the air is 100mm；The II stages
890 DEG C of start rolling temperature, 815 DEG C of finishing temperature rolls rear steel plate and enters ACC and quickly cools down, 532 DEG C of red temperature.
（2）Technology for Heating Processing：Temper is carried out to steel plate, tempering heating-up temperature is 240 DEG C, and total heat time is
45min。
The mechanical property and microstructure of gained steel plate are shown in Table 1；Microscopic structure is shown in Fig. 2.
Embodiment 3
The present embodiment high intensity Q630GJ steel plate thickness is 50mm, using V-Ni-Nb-Ti microalloy composition designs, its chemistry into
It is grouped into and weight/mass percentage composition is：C：0.14%, Si：0.60%, Mn：0.95%, P：0.020%, S：0.003%, Alt：
0.040%, V：0.044%, Ni：0.38%, Nb：0.028%, Ti：0.018%, surplus is Fe and micro inevitable impurity.
The present embodiment high intensity Q630GJ Plate Productions technique includes rolling and is heat-treated, and comprises the following steps that：
（1）Rolling mill practice：Using II type controlled rolling process, I-stage adds up drafts up to 36%, and the steel thickness that dries in the air is 120mm；The II stages
870 DEG C of start rolling temperature, 810 DEG C of finishing temperature rolls rear steel plate and enters ACC and quickly cools down, 550 DEG C of red temperature.
（2）Technology for Heating Processing：Temper is carried out to steel plate, tempering heating-up temperature is 250 DEG C, and total heat time is
75min。
The mechanical property and tissue of gained steel plate are shown in Table 1；Microscopic structure is shown in Fig. 3.
Embodiment 4
The present embodiment high intensity Q630GJ steel plate thickness is 80mm, using V-Ni-Nb-Ti microalloy composition designs, its chemistry into
It is grouped into and weight/mass percentage composition is：C：0.18%, Si：0.40%, Mn：1.30%, P：0.009%, S：0.008%, Alt：
0.050%, V：0.041%, Ni：0.35%, Nb：0.026%, Ti：0.025%, surplus is Fe and micro inevitable impurity.
The present embodiment high intensity Q630GJ Plate Productions technique includes rolling and is heat-treated, and comprises the following steps that：
（1）Steel plate rolling technique：Using II type controlled rolling process, I-stage adds up drafts up to 38%, and the steel thickness that dries in the air is 150mm；II
860 DEG C of stage start rolling temperature, 790 DEG C of finishing temperature rolls rear steel plate and enters ACC and quickly cools down, 546 DEG C of red temperature.
（2）Technology for Heating Processing：Temper is carried out to steel plate, tempering heating-up temperature is 260 DEG C, and total heat time is
120min。
The mechanical property and tissue of gained steel plate are shown in Table 1；Microscopic structure is shown in Fig. 4.
Embodiment 5
The present embodiment high intensity Q630GJ steel plate thickness is 60mm, using V-Ni-Nb-Ti microalloy composition designs, its chemistry into
It is grouped into and weight/mass percentage composition is：C：0.08%, Si：0.25%, Mn：1.70%, P：0.017%, S：0.002%, Alt：
0.035%, V：0.045%, Ni：0.39%, Nb：0.03%, Ti：0.020%, surplus is Fe and micro inevitable impurity.
The present embodiment high intensity Q630GJ Plate Productions technique includes rolling and is heat-treated, and comprises the following steps that：
（1）Rolling mill practice：Using II type controlled rolling process, I-stage adds up drafts up to 30%, and the steel thickness that dries in the air is 130mm；The II stages
875 DEG C of start rolling temperature, 820 DEG C of finishing temperature rolls rear steel plate and enters ACC and quickly cools down, 530 DEG C of red temperature.
（2）Technology for Heating Processing：Temper is carried out to steel plate, tempering heating-up temperature is 215 DEG C, and total heat time is
90min。
The mechanical property and tissue of gained steel plate are shown in Table 1；Microscopic structure is shown in Fig. 5.
The mechanical property of table 1 and tissue
Above example is only used to illustrative and not limiting technical scheme, although entering with reference to above-described embodiment to the present invention
Go detailed description, it will be understood by those within the art that：Still the present invention can be modified or equally replaced
Change, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover will in right of the invention
Ask among scope.
Claims (9)
1. a kind of high intensity Q630GJ steel plates, it is characterised in that the steel plate uses V-Ni-Nb-Ti microalloy composition designs, institute
State microalloy chemical composition and weight/mass percentage composition is：V：0.04~0.045%, Ni：0.35~0.45%, Nb：0.02~
0.03%, Ti：0.015~0.025%.
2. a kind of high intensity Q630GJ steel plates according to claim 1, it is characterised in that the steel plate chemical composition composition
And weight/mass percentage composition is：C≤0.18%, Si≤0.60%, Mn≤1.70%, P≤0.020%, S≤0.010%, Alt：0.015-
0.050%, V：0.04~0.045%, Ni：0.35~0.45%, Nb：0.02~0.03%, Ti：0.015~0.025%, surplus is Fe
With micro inevitable impurity.
3. a kind of high intensity Q630GJ steel plates according to claim 1 or 2, it is characterised in that the steel plate thickness≤
80mm。
4. a kind of high intensity Q630GJ steel plates according to claim 1 or 2, it is characterised in that the steel plate is organized as back
Fiery ferrite+martensite+bainite, yield tensile ratio≤0.83.
5. the production method based on a kind of high intensity Q630GJ steel plates described in claim 1-4 any one, it is characterised in that
The production method includes rolling process and heat treatment step.
6. a kind of production method of high intensity Q630GJ steel plates according to claim 5, it is characterised in that the rolling work
Sequence, using II type controlled rolling process, I-stage ensures axial rolling on earth, and it is 30~40% to add up drafts, and the steel thickness that dries in the air is H+70mm, institute
H is stated for finished steel plate thickness, unit is mm.
7. a kind of production method of high intensity Q630GJ steel plates according to claim 5, it is characterised in that the rolling work
Sequence, II 860~900 DEG C of stage start rolling temperature, 780~820 DEG C of finishing temperature.
8. a kind of production method of high intensity Q630GJ steel plates according to claim 5-7 any one, it is characterised in that
The rolling process, rolls rear steel plate and enters ACC and quickly cool down, 500~550 DEG C of red temperature.
9. a kind of production method of high intensity Q630GJ steel plates according to claim 5-7 any one, it is characterised in that
The heat treatment step, carries out temper, 200~260 DEG C of tempering heating-up temperature, total heat time 1.5min/mm × H, institute
H is stated for finished steel plate thickness, unit is mm.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888565A (en) * | 2012-09-22 | 2013-01-23 | 内蒙古包钢钢联股份有限公司 | High-strength steel plate with yield strength at 690MPa level and manufacture method thereof |
| CN103436784A (en) * | 2013-09-17 | 2013-12-11 | 济钢集团有限公司 | Steel plate for offshore platform and preparation method thereof |
| CN106282774A (en) * | 2016-08-31 | 2017-01-04 | 南京钢铁股份有限公司 | A kind of high transverse and longitudinal impact ratio big thickness Q690E high-strength steel production method |
-
2017
- 2017-04-21 CN CN201710266636.4A patent/CN107099750A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888565A (en) * | 2012-09-22 | 2013-01-23 | 内蒙古包钢钢联股份有限公司 | High-strength steel plate with yield strength at 690MPa level and manufacture method thereof |
| CN103436784A (en) * | 2013-09-17 | 2013-12-11 | 济钢集团有限公司 | Steel plate for offshore platform and preparation method thereof |
| CN106282774A (en) * | 2016-08-31 | 2017-01-04 | 南京钢铁股份有限公司 | A kind of high transverse and longitudinal impact ratio big thickness Q690E high-strength steel production method |
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Application publication date: 20170829 |