CN107723606A - 780MPa level low-carbon bainite steel plates and its production method - Google Patents
780MPa level low-carbon bainite steel plates and its production method Download PDFInfo
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- CN107723606A CN107723606A CN201710813888.4A CN201710813888A CN107723606A CN 107723606 A CN107723606 A CN 107723606A CN 201710813888 A CN201710813888 A CN 201710813888A CN 107723606 A CN107723606 A CN 107723606A
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D8/02—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
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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
- C21D8/02—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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
780MPa level low-carbon bainite steel plates and its production method, belong to technical field of steel production.The steel plate chemical composition composition is C：0.07~0.09%, Si：0.12~0.22%, Mn：1.2~1.4%, P≤0.010%, S≤0.005%, Ni：0.45~0.6%, Cr：0.4~0.5%, Nb：0.01~0.03%, Al：0.05~0.07%, Mo：0.30~0.40%, V：0.03~0.04%, Ti：0.004~0.007%, B：0.0010~0.0020%, surplus is Fe and inevitable impurity.The production method includes smelting continuous casting, heating, rolling, stacking slow cooling, Tempering and Quenching process.The present invention is using the high Al of low Ti composition design and rational controlled rolling and controlled cooling and Technology for Heating Processing, the excellent in mechanical performance of steel plate.
Description
Technical field
The present invention relates to a kind of 780MPa levels low-carbon bainite steel plate and its production method, belongs to steel production technology neck
Domain.
Background technology
Low-carbon bainite steel be based on molybdenum steel or molybdenum boron steel, while add manganese, chromium, nickel and other microalloyings member
Element（Niobium, titanium, vanadium etc.）, a series of low-carbon bainite steel grades for developing, this kind of steel roll state tissue generally by granular bainite,
Second phase compositions such as acicular ferrite, ferrite bainite and M/A islands.Due to it, that there is high intensity, high tenacity to have concurrently is good
Welding performance, it is widely used in the fields such as engineering machinery, pressure vessel, shipbuilding, aviation and petroleum gas delivering pipe line.Due to
Low-carbon bainite steel carbon content is reduced, and the quenching degree of steel reduces, so low-carbon bainite steel is commonly incorporated into B element to improve quenching for steel
Permeability, while it is also required to add substantial amounts of Ti to fix N element, so as to reduce the generation of BN in steel to increase containing for solid solution boron
Amount, but substantial amounts of TiN field trashes cause the decline of steel impact flexibility in steel.
In patent application CN104988395A, a kind of TMCP states low-carbon bainite steel and its production method are disclosed, in steel
Composition design on add 0.02~0.04% Al, 0.01~0.02% Ti, and the addition of a large amount of Ti elements causes in steel
TiN field trashes are formed, because the Precipitation Temperature of TiN in steel is high, easy agglomeration, bulk TiN field trashes are made in shock loading
It is basically unchanged shape under and fragmentation, thick TiN particles turn into an important factor for reducing steel low-temperature flexibility, and mechanical property of steel plate is equal
Even property and stability problem are difficult to control.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of good 780MPa level low-carbon bainites of low-temperature impact toughness
Steel plate；Present invention also offers a kind of production method of 780MPa levels low-carbon bainite steel plate.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of 780MPa levels low-carbon bainite steel plate,
The steel plate chemical composition and its weight/mass percentage composition are C：0.07~0.09%, Si：0.12~0.22%, Mn：1.2~1.4%, P
≤ 0.010%, S≤0.005%, Ni：0.45~0.6%, Cr：0.4~0.5%, Nb：0.01~0.03%, Al：0.05~0.07%,
Mo：0.30~0.40%, V：0.03~0.04%, Ti：0.004~0.007%, B：0.0010~0.0020%, surplus is for Fe and not
Evitable impurity.
Steel plate thickness≤80mm of the present invention.
Steel plate yield strength >=690MPa of the present invention, 770~930MPa of tensile strength, elongation after fracture >=17% ,-
40 DEG C of ballistic work >=100J, welding cold cracking Sensitivity Index Pcm≤0.23.
Present invention also offers a kind of production method of 780MPa levels low-carbon bainite steel plate, the production method includes smelting
Continuous casting, heating, rolling, stacking slow cooling, Tempering and Quenching process are refined, it is described to smelt Chemical Composition in Cast Billet and its matter in continuous casting working procedure
Amount percentage composition is C：0.07~0.09%, Si：0.12~0.22%, Mn：1.2~1.4%, P≤0.010%, S≤0.005%, Ni：
0.45~0.6%, Cr：0.4~0.5%, Nb：0.01~0.03%, Al：0.05~0.07%, Mo：0.30~0.40%, V：0.03~
0.04%, Ti：0.004~0.007%, B：0.0010~0.0020%, surplus is Fe and inevitable impurity.
Heating process described in the inventive method heats for 4th area, and strand heats Ith area in heating furnace and is heated to 780 ± 10
DEG C, the heat time is 1h ± 20min；Heat IIth area and be heated to 1100 DEG C ± 10 DEG C, the heat time is 2h ± 20min；Heating III
Area is heated to 1220 ± 10 DEG C, and the heat time is 2h ± 20min；IVth area is soaking zone, and temperature is 1220 ± 10 DEG C, soaking time
For 1h ± 10min.
Rolling process described in the inventive method, roughing start rolling temperature are 1150 ± 30 DEG C, and finishing temperature is 1050 ± 20 DEG C,
Single pass reduction ratio is 11~16%, and total reduction is 50~58.7%；Finish rolling start rolling temperature is 840 ± 20 DEG C, and finishing temperature is
800 ± 20 DEG C, single pass reduction ratio is 11~16%, and total reduction is 46.7~56.4%.
Stacking slow cooling process described in the inventive method, the steel plate after finish rolling is cooled to 3~6 DEG C/s cooling velocity
680 ± 20 DEG C, stacking processing afterwards, the stacking time is 24 ± 2h.
Tempering and Quenching process described in the inventive method, steel plate is heated to 930 ± 15 DEG C, quenched after being incubated 40 ± 10min
Fire, then it is tempered, 620~650 DEG C of temperature, tempering insulation time is 70 ± 10min.
The mentality of designing of the present invention：
The requirement of the intensity of low-carbon bainite steel plate, plasticity, toughness and welding performance is considered, using " the low high Al " of Ti composition
Design, the effect that Ti elements fix N element can be suitably played, while the raising of Al elements also plays the work of fixed N element
With reducing the influence of TiN field trash steel plate impact flexibility, steel plate has good quenching degree；Using rational controlled rolling and controlled cooling
And Technology for Heating Processing, it is final to obtain the tempered sorbite tissue with excellent toughness, plasticity and higher-strength, ensure the property of steel plate
It can require.
Wherein, the effect of each chemical composition and content in the present invention is：
C：Effect in steel is solution strengthening, but unfavorable to welding performance.Content is higher, and welding performance is poorer, in low weldering
In the composition design for connecing crack sensitivity water-power steel plate, in order that steel plate has good welding performance, therefore by steel
Carbon content control is between 0.07~0.09%.
Si：Effect in steel is solution strengthening, can also improve the quenching degree of steel, Si contents Gao Shihui make steel plasticity and
Welding performance is reduced, and therefore, Si content is controlled in 0.12~0.0.22%.
Mn：Effect in steel is solution strengthening and improves quenching degree, but too high levels will make steel cause crystalline substance at high temperature
Grain roughening, and Mn is too high improves carbon equivalent, it is also unfavorable to weldability.Mn too high levels also can give to smelt simultaneously comes with rolled bands
Difficulty, it is also unfavorable to the toughness of steel.Therefore, the control of Mn contents is in the range of 1.2~1.4%.
Ni：Belong to the element being all dissolved in steel, have the function that substantially to reduce Cold Brittleness Transition Temperature, to improving steel
Low-temperature impact toughness plays an important role, but Ni is noble metal, answers its content of suitable control, therefore, the control of Ni amounts 0.45~
In the range of 0.6%.
Cr：Cr elements and Fe elements form continuous solid solution, and form a variety of carbide with C element.It is solid-solubilized in steel
Cr elements and Cr carbide can improve the intensity of steel plate.The increase of Cr contents, can form thicker carbide, so as to deteriorate steel
The impact property of plate.Therefore, the control of Cr contents is in the range of 0.4~0.5%.
Mo：Mo elements are solid-solubilized in steel in austenitizing, are realized carefully in cooling procedure by suppressing diffusion Interface Motion
Change final tissue.Mo elements are expensive alloying elements simultaneously, to ensure plate property and cost, the control of Mo contents 0.3~
In the range of 0.4%.
Nb：Effects of the Nb in steel, on the one hand to reach the purpose of crystal grain thinning and increase steel plate thickness, on the other hand it is
Two-phase control rolling is realized, i.e., non-recrystallization zone lower temperature rolling is to improve dislocation density inside austenite, in subsequent cooling
During form the tissue of refinement.Nb contents are higher to form thicker NbC precipitations in drawing process, so as to reduce steel plate
Low-temperature impact work, therefore, Nb contents control in the range of 0.01~0.03%.
V：V is combined in steel with N and C, is formed fine precipitation particles, is played precipitation enhancement.V and Cu in steel all
It has been precipitation enhancement, but for relative Cu, V need to only add minimal amount of, you can reach equal precipitation strength effect.
Therefore, V content control is in the range of 0.03~0.04%.
B：B element adds the quenching degree that steel plate can be improved in steel, forms bainite or martensitic structure.B content is higher
When, B atoms can be enriched with crystal boundary, reduced crystal boundary and combined energy, so as to occur to be broken when by percussion along crystalline substance dissociation.Cause
This, B content is controlled in the range of 0.001~0.002%.
Ti：Ti elements can play the effect such as crystal grain thinning and precipitation strength, solution strengthening, while add Ti elements and can consolidate
N element is determined, so as to reduce the generation of BN in steel to increase the content of solid solution boron in steel.But substantial amounts of Ti elements also result in steel
The generation of a large amount of TiN field trashes, the low temperature impact properties of steel plate are reduced, therefore the control of Ti contents is in 0.004~0.007% scope
It is interior.
Al：Al elements form tiny AlN precipitation in high temperature, suppress austenite crystal in heating of plate blank austenitizing
Grow up, reach fining austenite grains, improve the purpose of the toughness of steel at low temperature.In addition, properly increasing Al content, may be used also
The generation of BN in steel is further reduced, increases the content that boron is dissolved in steel, Al is too high to cause larger Al oxides to be formed, drop
The low temperature impact properties and detection capability of low steel plate.Therefore, Al content control is in the range of 0.05~0.07%.
It is using beneficial effect caused by above-mentioned technical proposal：The present invention by using " the low high Al " of Ti into setting up separately
Meter and rational controlled rolling and controlled cooling and Technology for Heating Processing, it is final to obtain with excellent toughness, plasticity, the tempered sorbite of higher-strength
Tissue, ensure the excellent in mechanical performance of steel plate, -40 DEG C of ballistic work >=100J, far beyond index specified in engineer applied, surrender
Intensity >=690MPa, tensile strength are 770~930MPa, elongation after fracture >=17%.
Brief description of the drawings
Fig. 1 is the metallographic structure figure of the low-carbon bainite steel plate of the embodiment of the present invention 1；
Fig. 2 is the metallographic structure figure of the low-carbon bainite steel plate of the embodiment of the present invention 2；
Fig. 3 is the metallographic structure figure of the low-carbon bainite steel plate of the embodiment of the present invention 3；
Fig. 4 is the metallographic structure figure of the low-carbon bainite steel plate of the embodiment of the present invention 4；
Fig. 5 is the metallographic structure figure of the low-carbon bainite steel plate of the embodiment of the present invention 5.
Embodiment
With reference to embodiment, the present invention is further detailed explanation.
The production method of this 780MPa level low-carbon bainite steel plates, the production method include smelting continuous casting, heat, roll
System, stacking slow cooling, Tempering and Quenching process, each operation technique are as described below：
（1）Smelt continuous casting working procedure：Smelting molten steel simultaneously casts the strand that thickness is 300mm, stacks of blanks cooling more than 48h, blank
Fed to boiler is examined through scafing in surface.
（2）Heating process：Heated for 4th area, strand heats Ith area in heating furnace and is heated to 780 ± 10 DEG C, the heat time
For 1h ± 20min；Heat IIth area and be heated to 1100 ± 10 DEG C, the heat time is 2h ± 20min；Heat IIIth area be heated to 1220 ±
10 DEG C, the heat time is 2h ± 20min；IVth area is soaking zone, and temperature is 1220 ± 10 DEG C, and soaking time is 1h ± 10min.
（3）Rolling process：Roughing start rolling temperature is 1150 ± 30 DEG C, and finishing temperature is 1050 ± 20 DEG C, single pass pressure
Rate is 11~16%, and total reduction is 50~58.7%；Finish rolling start rolling temperature is 840 ± 20 DEG C, and finishing temperature is 800 ± 20 DEG C,
Single pass reduction ratio is 11~16%, and total reduction is 46.7~56.4%.
（4）Stacking slow cooling process：Steel plate after finish rolling is cooled to 680 ± 20 DEG C with 3~6 DEG C/s cooldown rate, it
Stacking is handled afterwards, and the stacking time is 24 ± 2h.
（5）Tempering and Quenching process：Steel plate is heated to 930 ± 15 DEG C, quenches after being incubated 40 ± 10min, then carries out
Tempering, 620~650 DEG C of temperature, tempering insulation time is 70 ± 10min.
Embodiment 1-10：The production method of this 780MPa level low-carbon bainite steel plates uses following concrete technologies.
（1）Steel plate composition：The composition of steel plate is shown in Table 1 obtained by each embodiment.
Table 1：Steel plate composition（wt%）
In table 1, surplus is Fe and inevitable impurity.
（2）Technical process：Each embodiment heating, rolling, stacking slow cooling, the technological parameter of Tempering and Quenching process be shown in Table 2,
3、4。
Table 2：The technological parameter of heating process
Table 3：The technological parameter of rolling process
Table 4：The technological parameter of stacking slow cooling, Tempering and Quenching process
（3）Properties of product：Ultra-low temperature surroundings obtained by each embodiment are shown in Table 5 with the thickness and mechanical performance index of high manganese steel sheet.
Table 5：Steel plate thickness and mechanical property
In table 5, impact specimen size used is 10 × 10 × 55mm when detecting -40 DEG C of ballistic works.
Claims (9)
1. a kind of 780MPa levels low-carbon bainite steel plate, it is characterised in that the steel plate chemical composition and its weight/mass percentage composition
For C：0.07~0.09%, Si：0.12~0.22%, Mn：1.2~1.4%, P≤0.010%, S≤0.005%, Ni：0.45~
0.6%, Cr：0.4~0.5%, Nb：0.01~0.03%, Al：0.05~0.07%, Mo：0.30~0.40%, V：0.03~0.04%,
Ti：0.004~0.007%, B：0.0010~0.0020%, surplus is Fe and inevitable impurity.
2. 780MPa levels low-carbon bainite steel plate according to claim 1, it is characterised in that the steel plate thickness≤
80mm。
3. 780MPa levels low-carbon bainite steel plate according to claim 1 or 2, it is characterised in that the steel plate surrender is strong
Degree >=690MPa, 770~930MPa of tensile strength, elongation after fracture >=17%, -40 DEG C of ballistic work >=100J, welding cold cracking are quick
Feel indices P cm≤0.23.
4. based on the production method of the 780MPa level low-carbon bainite steel plates described in claim 1-3 any one, its feature exists
In the production method includes smelting continuous casting, heating, rolling, stacking slow cooling, Tempering and Quenching process, the smelting continuous casting work
Chemical Composition in Cast Billet and its weight/mass percentage composition are C in sequence：0.07~0.09%, Si：0.12~0.22%, Mn：1.2~1.4%, P
≤ 0.010%, S≤0.005%, Ni：0.45~0.6%, Cr：0.4~0.5%, Nb：0.01~0.03%, Al：0.05~0.07%,
Mo：0.30~0.40%, V：0.03~0.04%, Ti：0.004~0.007%, B：0.0010~0.0020%, surplus is for Fe and not
Evitable impurity.
5. the production method of 780MPa levels low-carbon bainite steel plate according to claim 4, it is characterised in that：The heating
Process heats for 4th area, and strand heats Ith area in heating furnace and is heated to 780 ± 10 DEG C, and the heat time is 1h ± 20min；Heating
IIth area is heated to 1100 ± 10 DEG C, and the heat time is 2h ± 20min；Heat IIIth area and be heated to 1220 ± 10 DEG C, the heat time is
2h±20min；IVth area is soaking zone, and temperature is 1220 ± 10 DEG C, and soaking time is 1h ± 10min.
6. the production method of 780MPa levels low-carbon bainite steel plate according to claim 4, it is characterised in that：The rolling
Process, roughing start rolling temperature are 1150 ± 30 DEG C, and finishing temperature is 1050 ± 20 DEG C, and single pass reduction ratio is 11~16%, stagnation pressure
Lower rate is 50~58.7%.
7. the production method of 780MPa levels low-carbon bainite steel plate according to claim 5, it is characterised in that：The rolling
Process, finish rolling start rolling temperature are 840 ± 20 DEG C, and finishing temperature is 800 ± 20 DEG C, and single pass reduction ratio is 11~16%, under stagnation pressure
Rate is 46.7~56.4%.
8. the production method of the 780MPa level low-carbon bainite steel plates according to claim 4-6 any one, its feature exist
In：The stacking slow cooling process, the steel plate after finish rolling is cooled to 680 ± 20 DEG C with 3~6 DEG C/s cooling velocity, Zhi Houdui
Pile processing, the stacking time is 24 ± 2h.
9. the production method of the 780MPa level low-carbon bainite steel plates according to claim 4-6 any one, its feature exist
In：The Tempering and Quenching process, steel plate is heated to 930 ± 15 DEG C, quenches after being incubated 40 ± 10min, is then tempered,
620~650 DEG C of temperature, tempering insulation time are 70 ± 10min.
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| CN201710813888.4A CN107723606A (en) | 2017-09-11 | 2017-09-11 | 780MPa level low-carbon bainite steel plates and its production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388775A (en) * | 2021-06-03 | 2021-09-14 | 南京钢铁股份有限公司 | Production method of 1000 MPa-grade high-strength steel plate for hydroelectric engineering |
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|---|---|---|---|---|
| CN104711488A (en) * | 2015-02-12 | 2015-06-17 | 舞阳钢铁有限责任公司 | Large-thickness high-strength steel plate for F690 ocean engineering and manufacturing method of steel plate |
| CN106834925A (en) * | 2017-01-12 | 2017-06-13 | 河钢股份有限公司 | A kind of 780MPa grades of quenching and tempering type water-power steel plate and production method |
-
2017
- 2017-09-11 CN CN201710813888.4A patent/CN107723606A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104711488A (en) * | 2015-02-12 | 2015-06-17 | 舞阳钢铁有限责任公司 | Large-thickness high-strength steel plate for F690 ocean engineering and manufacturing method of steel plate |
| CN106834925A (en) * | 2017-01-12 | 2017-06-13 | 河钢股份有限公司 | A kind of 780MPa grades of quenching and tempering type water-power steel plate and production method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388775A (en) * | 2021-06-03 | 2021-09-14 | 南京钢铁股份有限公司 | Production method of 1000 MPa-grade high-strength steel plate for hydroelectric engineering |
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Application publication date: 20180223 |