CN108359909A - High tough martensite steel method is prepared by thin-belt casting rolling and aging technique - Google Patents
High tough martensite steel method is prepared by thin-belt casting rolling and aging technique Download PDFInfo
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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
- 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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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- 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
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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Abstract
It is that high tough martensite steel method is prepared by thin-belt casting rolling and aging technique the invention belongs to the technical issues that need to address, belongs to metallurgical engineering technical field.It is as follows：(1) it smelts the molten steel of ingredient qualification and is hoisted to ladle turret；(2) molten steel injects specially designed tundish；(3) molten steel flows into double roller gap and starts to solidify and carry out casting；(4) made-up belt after casting carries out online hot rolling, cooling and then cuts off end to end；(5) strip coiling；(6) ageing treatment after uncoiling.Technological process and production time can be greatly shortened in the present invention, greatly reduce energy consumption and improve productivity.Compared with existing automobile martensite steel strip, the quick Solidification Characteristics of the design of microalloy optimizing components and thin-belt casting rolling technique are combined by the present invention, by subsequent ageing treatment the comprehensive mechanical property of martensite steel are further improved.
Description
Technical field
The invention belongs to metallurgical engineering technical field, particularly relate to prepare high tough horse by thin-belt casting rolling and aging technique
Family name's body steel method.More particularly it relates to 1200MPa to 2000MPa tensile strength, 900MPa or more surrenders are strong
Degree, the manufacturing method of the economical Maraging steel strip of elongation percentage 9-20%.
Background technology
Automobile martensite steel is the important representative of advanced high-strength steel (AHSS), and core strengthening mechanism is martensite
Lath structure, corresponding tensile strength range are mainly used as vehicle body side crash protection generally in the section of 1000-1500MPa
And the safety components such as bumper.The production technology of martensite steel strip is usually that cold rolled strip coil heats on continuous annealing line at present
To austenite phase field, then quenching forms martensite.The martensite steel strip that this process route obtains, intensity is very high, but
Plastic finite hampers the steel further applying in vehicle structure.
And widely applied continuous casting process in being produced relative to current steel and iron industry, double roll strip casting roll process is emerging
Environmentally protective production Technology has significantly reduce energy consumption, construction investment is few, floor space is small and production efficiency is high etc.
Plurality of advantages is taken seriously in many industrially developed country.It is thin that Niu Ke iron companies of the U.S. established the first item in the world in 2002
Band casting carbon steel is commercialized producing line Castrip, at present using carbon steel strip as major product.The technology is in addition to energy-saving
Outside advantage, the product technology feature also not available for some continuous casting process.Since the technique just completes steel within a very short time
Liquid realizes preparation of molten steel during crystallization and freezing from liquid metals to solid sheet to the process of solid-state strip, solidification
Cooling rate is more than 1000 DEG C/s, significantly suppresses the alloying element majority of solidifying segregation and solid solution because of the insufficient time
And it can not be precipitated from matrix.Therefore, double-roller rolling technique not only has process advantage, simultaneously because quickly solidification and cooling spy
Point, steel material tissue and performance to develop new bring new possibility.
The present invention is exactly that thin-belt casting rolling technique is made full use of quickly to solidify this technical characterstic, and to martensite steel ingredient weight
New design optimization makes full use of V, Nb microalloying so that the microalloy elements such as V, Nb are still solid-solubilized in horse after casting is batched
In family name's body, nanometer (V, Nb) (C, N) particle of small and dispersed is then precipitated in subsequent ageing treatment, horse can be caused in this way
Family name's body steel intensity in ag(e)ing process does not decline or even can also increase, and simultaneously plasticity be improved significantly.Same
Under gauge thickness, by the Maraging steel strip of thin-belt casting rolling technique productions, with traditional cold rolling martensite steel strip phase
Than shortening not only due to process and energy consumption reducing and the cost of production is brought to decline to a great extent；Meanwhile due also to it integrates mechanics
Performance is also further improved, and extends the steel grade further applying in the car.
Invention content
It is that high tough martensite steel is prepared by thin-belt casting rolling and aging technique the invention belongs to the technical issues that need to address
Method, to which the process time can be shortened, greatly improving production efficiency, reduce energy consumption, and by optimizing components, further change
The mechanical property of kind Maraging steel.
This method comprises the following steps：
(1) ingredient is smelted to qualified molten steel, and is hoisted to bale panoramic tables, calm 15-25min.
(2) molten steel injects big tundish：Tundish Argon 10-20min drives out of molten steel in packet after air through long nozzle
It is injected into tundish from ladle, controls 30-60 DEG C of the degree of superheat, coverture is added for keeping the temperature and adsorbing folder in molten steel surface
It is miscellaneous.
(3) double-roller rolling：By the small tundish in molten steel injection lower section of step (2) tundish, supplied to dual-roller thin-band conticaster
Molten steel is answered, between the molten steel in small tundish is poured into double roller using submersed nozzle, casting speed control is double in 80-120m/min
Roller spacing is adjustable between 1.5-5mm, and produced Maraging steel strip thickness is 2-4mm.Strip surface shape in order to prevent
At iron scale, small tundish to casting region is atmosphere closed area from below, is protected by argon gas or nitrogen atmosphere.
(4) made-up belt hot rolling：Hot rolling, the online standby drafts of hot rolling installing of casting band are carried out to strip obtained in step (3)
Between 30-50%, control finishing temperature is higher than 900 DEG C.Belt steel thickness is 1-3mm after made-up belt hot rolling, to the strip after hot rolling
200 DEG C are cooled to through fog cooling device to be cut off end to end hereinafter, being then sent to cutter via withdrawing roll.
(5) strip crimps：The strip that step (4) is obtained carries out, in wire reel-up, obtaining finished product thin strip steel coil.
(6) ageing treatment：After the martensite steel thin coiled stock uncoiling that step (5) is obtained, it is heated to 250- in heating furnace
A certain temperature between 600 DEG C carries out timeliness 1-10min processing, obtains final Maraging steel strip product.
2. according to claim 1 prepare high tough martensite steel method by thin-belt casting rolling and aging technique,
It is characterized in that：The chemical composition of molten steel obtained by the step (1) is 0.1-0.3wt%C, 0.5-2.5%Mn, 0.05-0.8wt%
Si, 0.05-0.8wt%Mo, 0.01-0.3wt%V, 0.01-0.09wt%Nb, 0.1-0.8wt%Cr, P≤0.020wt%, S
≤ 0.02wt%, surplus are Fe and inevitable impurity.
3. according to claim 1 prepare high tough martensite steel method by thin-belt casting rolling and aging technique,
It is characterized in that：The step (2) and the double tundish of (3) use, and molten steel surface unprotect slag in the small tundish in lower section, therefore
Slag will not be brought into when being solidified between roller.
4. according to claim 1 prepare high tough martensite steel method by thin-belt casting rolling and aging technique,
It is characterized in that：The pressure of step (3) argon gas or nitrogen is 0.2-0.3MPa.
5. according to claim 1 prepare high tough martensite steel method by thin-belt casting rolling and aging technique,
It is characterized in that：Described its Main Tissues of step (6) are tempered martensite and carbide, may also comprise a small amount of ferrite, bainite
And deformed microstructure.
6. according to claim 1 prepare high tough martensite steel method by thin-belt casting rolling and aging technique,
It is characterized in that：Martensite cold-rolled steel sheet prepared by the step (6), yield strength >=900MPa, tensile strength is in 1200MPa
To the range of 2000MPa, breaking elongation 9-20%.
7. according to claim 1 prepare high tough martensite steel method by thin-belt casting rolling and aging technique,
It is characterized in that：Separately it is subject to a kind of lower or multiple element in strand or ingot casting obtained by the step (1), can obtains similar
Performance or performance further increase：Ni:0.1-3.0wt%, Cu:0.5-2.0wt%, [N]:0.002-0.25wt%, B:
0.001-0.004wt%, RE (rare earth):0.002-0.005wt%, Ca:0.005-0.03wt%.Wherein addition Ni can be further
Improve the quenching degree or low-temperature impact toughness of steel；Add the intensity that Cu etc. improves steel by precipitation strength；It adds [N] and adjusts Ovshinsky
The stability of body.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
Double roll strip casting roll process is different from traditional continuous casting and hot rolling technique, the technique productions flow is shorter, efficiency more
Height has evaded a series of intervening process steps in traditional strip production, and product specification is thin, can significantly reduce energy consumption and temperature
Room gas discharge, thus it is more environmentally protective.Under same gauge thickness, pass through the martensite ag(e)ing of thin-belt casting rolling technique productions
Steel strip shortens not only due to process compared with traditional cold rolling martensite steel strip and energy consumption reduces and brings production
Cost declines to a great extent；Meanwhile due also to by the quick solidification of V, Nb microalloying of martensite steel and thin band continuous casting technique and cold
But feature is combined, and (V, Nb) (C, N) nanometer phase can be precipitated in ag(e)ing process, is improved while maintaining intensity not decline
Plasticity so that the comprehensive mechanical property of martensite steel strip further improves, and extends the steel grade further answering in the car
With.
Description of the drawings
Fig. 1 is the integrated artistic flow diagram of the present invention.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides through thin-belt casting rollings and aging technique to prepare high tough martensite steel method, includes the following steps：
(1) molten steel of ingredient qualification is hoisted to bale panoramic tables：By the Maraging steel molten steel after LF ladle refinings
It is hoisted to bale panoramic tables, calm 15-25min.
(2) molten steel injects big tundish：Tundish Argon 20min drives out of molten steel in packet after air through long nozzle from steel
Packet is injected into tundish, controls 30-60 DEG C of the degree of superheat, and coverture is added in molten steel surface is mingled with for keeping the temperature and adsorbing.
(3) double-roller rolling：By the small tundish in molten steel injection lower section of step (2) tundish, supplied to dual-roller thin-band conticaster
Molten steel is answered, between the molten steel in small tundish is poured into double roller using submersed nozzle, casting speed control is produced in 90m/min
Maraging steel strip thickness is 2.5mm.Strip surface forms iron scale in order to prevent, and argon is carried out to the strip produced
Gas atmosphere protection.
(4) made-up belt hot rolling：Hot rolling, the online standby drafts of hot rolling installing of casting band are carried out to strip obtained in step (3)
Between 50%, control finishing temperature is higher than 900 DEG C.Belt steel thickness is 1.3mm after made-up belt hot rolling, to the strip after hot rolling through fog
Cooling device is cooled to 200 DEG C and is cut off end to end hereinafter, being then sent to cutter via withdrawing roll.
(5) strip crimps：The strip that step (4) obtains is crimped online, there are two coiling machines to carry out batching acquisition
Finished product thin strip steel coil.
(6) ageing treatment：After the martensite steel thin coiled stock uncoiling that step (5) is obtained, 250-600 is controlled in heating furnace
A certain temperature between DEG C carries out timeliness 3-10min processing, obtains final Maraging steel strip product.
Embodiment
The chemical composition (wt%) of 1 martensite ag(e)ing steel plate of table
| Embodiment | C | Si | Mn | Mo | Cr | V | Nb | Fe |
| 1 | 0.13 | 0.22 | 1.65 | 0.15 | 0.18 | 0.14 | 0.03 | Rest |
| 2 | 0.23 | 0.49 | 2.25 | 0.52 | 0.43 | 0.23 | 0.07 | Rest |
Embodiment 1
The present embodiment experiment is as follows using chemical composition, implementation steps shown in embodiment 1 in table 1：
(1) molten steel of ingredient qualification is hoisted to bale panoramic tables：By the Maraging steel molten steel after LF ladle refinings
It is hoisted to bale panoramic tables, calm 20min.
(2) molten steel injects big tundish：Tundish Argon 15min drives out of molten steel in packet after air through long nozzle from steel
Packet is injected into tundish, controls 40 DEG C of the degree of superheat, and coverture is added in molten steel surface is mingled with for keeping the temperature and adsorbing.
(3) double-roller rolling：By the small tundish in molten steel injection lower section of step (2) tundish, supplied to dual-roller thin-band conticaster
Molten steel is answered, between the molten steel in small tundish is poured into double roller using submersed nozzle, casting speed control is between 100m/min, double roller
Away from 2.5mm or so, produced Maraging steel strip thickness is 2mm.Strip surface forms iron scale in order to prevent, to institute
The strip of production carries out argon gas or nitrogen atmosphere protection.
(4) made-up belt hot rolling：Hot rolling, the online hot rolling drafts 30% of casting band, control are carried out to strip obtained in step (3)
950 DEG C of finishing temperature processed.Belt steel thickness is 1.4mm after made-up belt hot rolling, is cooled to through fog cooling device to the strip after hot rolling
200 DEG C are cut off end to end hereinafter, being then sent to cutter via withdrawing roll.
(5) strip crimps：The strip that step (4) obtains is crimped online, there are two coiling machines to carry out batching acquisition
Finished product thin strip steel coil.
(6) ageing treatment：After the martensite steel thin coiled stock uncoiling that step (5) is obtained, 250-600 is controlled in heating furnace
Timeliness 1-10min processing between DEG C obtains final Maraging steel strip product mechanical property and is shown in Table 2.
Embodiment 2
The present embodiment experiment is as follows using chemical composition, implementation steps shown in embodiment 2 in table 1：
(1) molten steel of ingredient qualification is hoisted to bale panoramic tables：By the Maraging steel molten steel after LF ladle refinings
It is hoisted to bale panoramic tables, calm 20min.
(2) molten steel injects big tundish：Tundish Argon 20min drives out of molten steel in packet after air through long nozzle from steel
Packet is injected into tundish, controls 60 DEG C of the degree of superheat, and coverture is added in molten steel surface is mingled with for keeping the temperature and adsorbing.
(3) double-roller rolling：By the small tundish in molten steel injection lower section of step (2) tundish, supplied to dual-roller thin-band conticaster
Molten steel is answered, between the molten steel in small tundish is poured into double roller using submersed nozzle, casting speed control is produced in 90m/min
Maraging steel strip thickness is 1.8mm.Strip surface forms iron scale in order to prevent, and argon is carried out to the strip produced
Gas atmosphere protection.
(4) made-up belt hot rolling：Hot rolling, the online hot rolling drafts 30% of casting band, control are carried out to strip obtained in step (3)
Finishing temperature processed is higher than 900 DEG C.Belt steel thickness is 1.3mm after made-up belt hot rolling, cold through fog cooling device to the strip after hot rolling
But it is cut off end to end to 200 DEG C hereinafter, being then sent to cutter via withdrawing roll.
(5) strip crimps：The strip that step (4) obtains is crimped online, there are two coiling machines to carry out batching acquisition
Finished product thin strip steel coil.
(6) ageing treatment：After the martensite steel thin coiled stock uncoiling that step (5) is obtained, 250-600 is controlled in heating furnace
A certain temperature between DEG C carries out timeliness 3-10min processing, obtains final its mechanical property of Maraging steel strip product
It is shown in Table 2.
The mechanical property of thin-belt casting rolling Maraging steel made from Examples 1 and 2 is as shown in table 2, it is seen that current process
Excellent performance is realized with composition design, i.e., under the design of alloy of relatively economical, can get the tensile strength of strip
Within the scope of 1200MPa-2000MPa, yield strength is in 900MPa or more, while elongation percentage is within the scope of 9-20%, same
Under intensity rank, the plasticity now invented is significantly better than existing martensite steel strip.
The mechanical property of thin-belt casting rolling Maraging steel in 2 Examples 1 and 2 of table
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications, and relevant improvement and profit can also be made
Decorations are regarded as protection scope of the present invention.
Claims (7)
1. preparing high tough martensite steel method by thin-belt casting rolling and aging technique, belong to metallurgical engineering technical field, it is special
Sign is to include the following steps：
(1) ingredient is smelted to qualified molten steel, and is hoisted to bale panoramic tables, calm 15-25min.
(2) molten steel injects big tundish：Tundish Argon 10-20min drives out of molten steel in packet after air through long nozzle from steel
Packet is injected into tundish, controls 30-60 DEG C of the degree of superheat, and coverture is added in molten steel surface is mingled with for keeping the temperature and adsorbing.
(3) double-roller rolling：By the small tundish in molten steel injection lower section of step (2) tundish, steel is supplied to dual-roller thin-band conticaster
Water, between the molten steel in small tundish is poured into double roller using submersed nozzle, casting speed control is between 80-120m/min, double roller
Away from adjustable between 1.5-5mm, produced Maraging steel strip thickness is 2-4mm.Strip surface forms oxygen in order to prevent
Change iron sheet, small tundish to casting region is atmosphere closed area from below, is protected by argon gas or nitrogen atmosphere.
(4) made-up belt hot rolling：Hot rolling is carried out to strip obtained in step (3), the online standby drafts of hot rolling installing of casting band is in 30-
Between 50%, control finishing temperature is higher than 900 DEG C.Belt steel thickness is 1-3mm after made-up belt hot rolling, to the strip after hot rolling through fog
Cooling device is cooled to 200 DEG C and is cut off end to end hereinafter, being then sent to cutter via withdrawing roll.
(5) strip crimps：The strip that step (4) is obtained carries out, in wire reel-up, obtaining finished product thin strip steel coil.
(6) ageing treatment：After the martensite steel thin coiled stock uncoiling that step (5) is obtained, it is heated to 250-600 DEG C in heating furnace
Between a certain temperature carry out timeliness 1-10min processing, obtain final Maraging steel strip product.
2. according to claim 1 prepare high tough martensite steel method, feature by thin-belt casting rolling and aging technique
It is：The chemical composition of molten steel obtained by the step (1) is 0.1-0.3wt%C, 0.5-2.5%Mn, 0.05-0.8wt%Si,
0.05-0.8wt%Mo, 0.01-0.3wt%V, 0.01-0.09wt%Nb, 0.1-0.8wt%Cr, P≤0.020wt%, S≤
0.02wt%, surplus are Fe and inevitable impurity.
3. according to claim 1 prepare high tough martensite steel method, feature by thin-belt casting rolling and aging technique
It is：The step (2) and (3) use double tundish, and molten steel surface unprotect slag in the small tundish in lower section, therefore between roller
Slag will not be brought when solidification into.
4. according to claim 1 prepare high tough martensite steel method, feature by thin-belt casting rolling and aging technique
It is：The pressure of step (3) argon gas or nitrogen is 0.2-0.3MPa.
5. according to claim 1 prepare high tough martensite steel method, feature by thin-belt casting rolling and aging technique
It is：Described its Main Tissues of step (6) are tempered martensite and carbide, may also comprise a small amount of ferrite, bainite and shape
Become tissue.
6. according to claim 1 prepare high tough martensite steel method, feature by thin-belt casting rolling and aging technique
It is：Martensite cold-rolled steel sheet prepared by the step (6), yield strength >=900MPa, tensile strength are arrived in 1200MPa
The range of 2000MPa, breaking elongation 9-20%.
7. according to claim 1 prepare high tough martensite steel method, feature by thin-belt casting rolling and aging technique
It is：Separately it is subject to a kind of lower or multiple element in strand or ingot casting obtained by the step (1), similar performance can be obtained
Or performance further increases：Ni:0.1-3.0wt%, Cu:0.5-2.0wt%, [N]:0.002-0.25wt%, B:0.001-
0.004wt%, RE (rare earth):0.002-0.005wt%, Ca:0.005-0.03wt%.Wherein addition Ni can further improve steel
Quenching degree or low-temperature impact toughness；Add the intensity that Cu etc. improves steel by precipitation strength；It adds [N] and adjusts the steady of austenite
It is qualitative.
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| CN201810512844.2A CN108359909B (en) | 2018-05-25 | 2018-05-25 | Method for preparing high-strength and high-toughness martensitic steel through thin strip casting and rolling and aging process |
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| CN201810512844.2A CN108359909B (en) | 2018-05-25 | 2018-05-25 | Method for preparing high-strength and high-toughness martensitic steel through thin strip casting and rolling and aging process |
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| CN111558701A (en) * | 2020-06-23 | 2020-08-21 | 中南大学 | Manufacturing method of fine-grain high-strength microalloy martensitic steel thin strip |
| CN112522573A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | B-containing martensite steel strip and manufacturing method thereof |
| CN112522633A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | Thin-gauge martensitic steel strip and manufacturing method thereof |
| CN112522580A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | Martensitic steel strip and manufacturing method thereof |
| CN112522571A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | Method for producing martensite steel strip by twin-roll thin-strip continuous casting |
| CN112522581A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | Method for producing 30CrMo hot rolled steel plate/strip by strip continuous casting |
| WO2021052312A1 (en) | 2019-09-19 | 2021-03-25 | 宝山钢铁股份有限公司 | Martensitic steel strip and manufacturing method therefor |
| CN113751680A (en) * | 2021-09-09 | 2021-12-07 | 中南大学 | Method for manufacturing ultra-fine grain maraging steel thin strip |
| CN115287551A (en) * | 2022-07-04 | 2022-11-04 | 宁波祥路中天新材料科技股份有限公司 | Hot rolled strip steel with tensile strength of more than or equal to 1800MPa produced by TSR production line and method |
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| CN112522580A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | Martensitic steel strip and manufacturing method thereof |
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| CN113751680B (en) * | 2021-09-09 | 2022-05-06 | 中南大学 | Method for manufacturing ultra-fine grain maraging steel thin strip |
| CN113751680A (en) * | 2021-09-09 | 2021-12-07 | 中南大学 | Method for manufacturing ultra-fine grain maraging steel thin strip |
| CN115287551A (en) * | 2022-07-04 | 2022-11-04 | 宁波祥路中天新材料科技股份有限公司 | Hot rolled strip steel with tensile strength of more than or equal to 1800MPa produced by TSR production line and method |
| CN115491593B (en) * | 2022-09-01 | 2024-04-02 | 宁波祥路中天新材料科技股份有限公司 | Hot rolled thin strip steel with tensile strength more than or equal to 1800MPa and produced by adopting TSR production line and method |
| CN115491593A (en) * | 2022-09-01 | 2022-12-20 | 宁波祥路中天新材料科技股份有限公司 | Hot-rolled thin strip steel with tensile strength of more than or equal to 1800MPa produced by TSR production line and method |
| CN115478203A (en) * | 2022-09-27 | 2022-12-16 | 张家港中美超薄带科技有限公司 | Method for producing hot-rolled thin strip steel based on thin strip casting and rolling and ultrahigh-strength part |
| CN117431374A (en) * | 2023-11-29 | 2024-01-23 | 张家港中美超薄带科技有限公司 | Method for producing martensitic steel based on double-roller casting and rolling process |
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