CN109055651A - A method of 600MPa grades of carriage body steel of hot rolling thin gauge are produced completely without head bar strip continuous casting and rolling flow path based on ESP - Google Patents
A method of 600MPa grades of carriage body steel of hot rolling thin gauge are produced completely without head bar strip continuous casting and rolling flow path based on ESP Download PDFInfo
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- CN109055651A CN109055651A CN201810934119.4A CN201810934119A CN109055651A CN 109055651 A CN109055651 A CN 109055651A CN 201810934119 A CN201810934119 A CN 201810934119A CN 109055651 A CN109055651 A CN 109055651A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention belongs to iron and steel technical fields, specially a kind of method that 600MPa grades of carriage body steel of hot rolling thin gauge are produced completely without head bar strip continuous casting and rolling flow path based on ESP, slab is directly rolled without soaking stove heating under the high pulling rate of this process flow, the technological process of production is short, it is energy saving, reduce cost, belong to low energy consumption green manufacturing process regime, can stable rolling produce 1.2mm~3.5mm thin gauge hot-rolling high-strength steel, the elongated thickness of hot rolled coil is uniform, performance is stablized, properties of product meet yield strength Rp0.2: >=600MPa, tensile strength Rm:650-830MPa, A >=15%, metallographic structure is ferrite and a small amount of granular bainite.
Description
Technical field
The invention belongs to iron and steel technical fields, specially a kind of to be produced based on ESP completely without head bar strip continuous casting and rolling flow path
The method of 600MPa grades of carriage body steel of hot rolling thin gauge.
Background technique
With the development of the automobile industry, it is the bearing capacity for improving automobile, meets energy conservation, section material and safety traffic, light
The demand of quantization uses thin format hot rolled steel plate that cold-rolled steel sheet is replaced to realize and has become development trend with hot Dai Leng, energy-saving and emission-reduction.
Vehicle structure not only wants intensity, plasticity, toughness, good fatigue properties and processability with higher with high-strength steel, simultaneously
Also require higher steel degree of purity, inclusion balling degree height, microscopic structure excellent.
In the prior art, yield strength 600MPa grades, Ultra-thin (h < 2.0mm, width 1500mm) high-strength steel are produced,
The main production technology using slab heating → roughing → finish rolling → smooth, the technological process of production is complicated, and energy-output ratio is big, raw
The steel plate of production cannot be guaranteed that thickness and precision and carriage body are required with steel plate type, and the stability of steel plate is poor.
Technical solution
To solve above-mentioned problems of the prior art, the present invention provides a kind of low cost production high strength steel
The method for manufacturing of RE600XT carriage body steel inexpensive can produce RE600XT carriage body steel using this method, produce
RE600XT carriage body steel, intensity, plasticity, toughness, good fatigue properties and processability with higher.
The specific technical solution of the present invention is as follows:
A kind of side producing 600MPa grades of carriage body steel of hot rolling thin gauge completely without head bar strip continuous casting and rolling flow path based on ESP
Method comprises the following steps that:
(1) raw material is smelted through converter, LF furnace；
(2) continuous casting；
(3) slab directly carries out hot rolling without soaking stove heating；
Hot rolled coil product thickness is 1.2mm~3.5mm；
The carriage body steel product meets yield strength Rp0.2: >=600MPa, tensile strength Rm:650-830MPa, A80
(elongation percentage) >=15%；
The carriage body comprises the following components in parts by weight component with steel: C:0.04%~0.06%, Si:0.15%~
0.50%, Mn:1.2%~1.9%, Als:0.02%~0.04%, Nb:0.015%~0.06%, Ti:0.04%~
0.13%, S :≤0.0010%, P :≤0.015%, N :≤0.005%, surplus Fe.
The process conditions of the converter smelting, LF refining are as follows: converter (300t combined blown converter, equipped with Lower proterozoic group, tapping
Slide plate skimming device) top and bottom combined blown converter smelting, the control of terminal C content is in 0.03-0.05%, and 1630-1660 DEG C of tapping temperature,
The control of steel slag thickness is in 60mm or less out；In 40-60min, refining terminates feed calcium line processing, Calcium treatment the control of LF refining time
Soft blow >=10min afterwards, molten steel composition temperature qualification carry out continuous casting.
Preferably, thickness of strand 90mm-110mm, pulling rate is 4.5m/min~6.0m/ in the continuous casting process
min。
Preferably, in the step 3, hot rolling roughing inlet temperature >=950 DEG C, induction heating heater outlet temperature 1050~
1180 DEG C, 810 DEG C~870 DEG C of exit temperature at finishing, 580 DEG C~660 DEG C of coiling temperature.
Preferably, the carriage body comprises the following components in parts by weight component with steel: C:0.04%~0.06%, Si:0.2%~
0.40%, Mn:1.5%~1.8%, Als:0.025%~0.03%, Nb:0.03%~0.05%, Ti:0.06%~
0.10%, S :≤0.0010%, P :≤0.015%, N :≤0.005%, surplus Fe.
Preferably, the carriage body comprises the following components in parts by weight component with steel: C:0.05%, Si:0.30%, Mn:
1.6%, Als:0.03%, Nb:0.04%, Ti:0.08%, S :≤0.0010%, P :≤0.015%, N :≤0.005%, it is remaining
Amount is Fe.
To make the yield strength of steel plate reach 600MPa grades, while meeting the matched well of toughness, weldability and formability
It is required that steel plate ingredient is designed using low-carbon high-manganese, and micro alloying element Nb, Ti are added in steel.If carbon content mistake in steel
Height, although the intensity of steel can be greatly improved, the plasticity of steel declines, and seriously affects the cold formability energy and weldability of steel, will
Causing to spring back the problems such as excessive is that following process causes difficulty.
Mn content also has an impact to the obdurability of steel, if content is relatively low, it cannot be guaranteed that low-carbon ingredient design when steel it is strong
Degree, if too high levels, influences the cold stamping and welding performance of steel plate, while rolling load being caused to increase.
In addition, the control of P, S are also particularly significant, due to being designed using the ingredient of high Mn, then S easily forms MnS folder in steel
Sundries and segregation, P easily form serious segregated zone, can greatly improve the rank of banded structure, and the sulfide along rolling direction presss from both sides
It is miscellaneous to cause the anisotropy of steel plate to increase with segregation, therefore should as far as possible control P, S content in steel in lower range.
Nb, Ti micro alloying element are added in steel, the recrystallization temperature of steel can be improved, RE600XT carriage body steel is made to exist
The deformed austenite tissue for obtaining storage large deformation energy while rolling is completed under higher temperature, and then obtains tiny phase transformation group
It knits.And using Nb, Ti carbonitride particle precipitation, may also function as precipitation strength effect, finally make steel plate refined crystalline strengthening,
Under the comprehensive function of phase transformation strengthening and precipitation strength, excellent properties are obtained.
Beneficial effect
(1) present invention is used using ESP completely without head bar strip continuous casting and rolling flow path production hot rolling thin gauge RE600XT carriage body
Steel, can stable rolling produce 1.2mm~3.5mm thin gauge hot-rolling high-strength steel, the elongated thickness of hot rolled coil is uniform, performance stablize, produce
Moral character is able to satisfy yield strength Rp0.2: >=600MPa, tensile strength Rm:650-830MPa, A >=15%, and metallographic structure is iron element
Body.The hot-rolled product performance produced is stable, dimensional tolerance is small, and hot-rolled state can reach≤2mm thin gauge band.Production
RE600XT carriage body steel can meet manufacture motor vehicle body steel demand.Ultra-thin strip is able to produce using this technique, reach " with
Bao Daihou " " with hot Dai Leng " energy-saving purpose has very high economic results in society.
(2) ESP produces RE600XT carriage body steel completely without head casting and rolling process, and ESP is completely without head casting and rolling process, steel
Water degree of purity is high, and Composition Control is stablized, and casting blank solidification speed is fast, as-cast structure is more uniform, Segregation of Chemical Composition is small, slab without
Soaking stove heating realizes direct casting, and slab is low in operation of rolling temperature, and rolling time is short, and reduction in pass is big, facilitate into
Step refining crystal grain.ESP thickness of strand 90mm-110mm, hot rolling product thickness 1.2mm-3.5mm, ESP connect completely without head continuous casting
Roll process does not need threading, and the elongated thickness of hot rolled coil is uniform, and dimensional accuracy is high, and plate shape is good, and performance is stablized.
(3) slab is directly rolled without soaking stove heating under the high pulling rate of this process flow, and the technological process of production is short, section
The about energy reduces cost, belongs to low energy consumption green manufacturing process regime.The hot-rolled product performance produced is stable, plate shape is good,
Dimensional tolerance is small, and hot-rolled state can reach≤2mm thin gauge band, reaches the mesh energy-saving " with hot Dai Leng " " with Bao Daihou "
's.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of 1 gained carriage body steel of embodiment.
Specific embodiment
Embodiment 1
A kind of side producing 600MPa grades of carriage body steel of hot rolling thin gauge completely without head bar strip continuous casting and rolling flow path based on ESP
Method comprises the following steps that:
(1) raw material is smelted through converter, LF furnace, process conditions are as follows: converter 300t top and bottom combined blown converter smelting, terminal C content
Control is in 0.03-0.05%, and 1630-1660 DEG C of tapping temperature, the control of steel slag thickness is in 60mm or less out；The control of LF refining time exists
40-60min, refining terminate feed calcium line processing, soft blow >=10min after Calcium treatment, and molten steel composition, temperature qualification carry out continuous casting
Casting.
(2) continuous casting: pulling rate degree is 5.5m/min, thickness of strand 90mm.
(3) slab directly carries out hot rolling without soaking stove heating；Hot rolling roughing inlet temperature >=950 DEG C, induction heater
1050 DEG C of outlet temperature, 810 DEG C of exit temperature at finishing, 630 DEG C of coiling temperature.
The carriage body comprises the following components in parts by weight component with steel: C:0.05%, Si:0.30%, Mn:1.6%, Als:
0.03%, Nb:0.04%, Ti:0.08%, S :≤0.0010%, P :≤0.015%, N :≤0.005%, surplus Fe.
Gained hot rolled coil product thickness is 1.2mm, and properties of product meet yield strength Rp0.2: >=600MPa, tensile strength
Rm:650MPa, A >=15%, metallographic structure are ferrite.
Embodiment 2
A kind of side producing 600MPa grades of carriage body steel of hot rolling thin gauge completely without head bar strip continuous casting and rolling flow path based on ESP
Method comprises the following steps that:
(1) raw material is smelted through converter, LF furnace, process conditions are as follows: converter 300t top and bottom combined blown converter smelting, terminal C content
Control is in 0.03-0.05%, and 1630-1660 DEG C of tapping temperature, the control of steel slag thickness is in 60mm or less out；The control of LF refining time exists
40-60min, refining terminate feed calcium line processing, soft blow >=10min after Calcium treatment, and molten steel composition temperature qualification carries out continuous casting
Casting.
(2) continuous casting: pulling rate degree is 5.0m/min, thickness of strand 110mm.
(3) slab directly carries out hot rolling without soaking stove heating；Hot rolling roughing inlet temperature >=950 DEG C, induction heater
1180 DEG C of outlet temperature, 870 DEG C of exit temperature at finishing, 620 DEG C of coiling temperature.
The carriage body comprises the following components in parts by weight component with steel: C:0.04%, Si:0.2%, Mn:1.5%, Als:
0.025%, Nb:0.03%, Ti:0.06%, S :≤0.0010%, P :≤0.015%, N :≤0.005%, surplus Fe.
Gained hot rolled coil product thickness is 3.5mm, and properties of product meet yield strength Rp0.2: >=600MPa, tensile strength
Rm:830MPa, A >=15%, metallographic structure are ferrite.
Embodiment 3
A kind of side producing 600MPa grades of carriage body steel of hot rolling thin gauge completely without head bar strip continuous casting and rolling flow path based on ESP
Method comprises the following steps that:
(1) raw material is smelted through converter, LF furnace, process conditions are as follows: converter 300t top and bottom combined blown converter smelting, terminal C content
Control is in 0.03-0.05%, and 1630-1660 DEG C of tapping temperature, the control of steel slag thickness is in 60mm or less out；The control of LF refining time exists
40-60min, refining terminate feed calcium line processing, soft blow >=10min after Calcium treatment, and molten steel composition temperature qualification carries out continuous casting
Casting.
(2) continuous casting: pulling rate degree is 5.2m/min, slab thickness 100mm.
(3) slab directly carries out hot rolling without soaking stove heating；Hot rolling roughing inlet temperature >=950 DEG C, induction heater
1100 DEG C of outlet temperature, 850 DEG C of exit temperature at finishing, 600 DEG C of coiling temperature.
The carriage body comprises the following components in parts by weight component with steel: C:0.06%, Si:0.40%, Mn:1.8%, Als:
0.03%, Nb:0.05%, Ti:0.10%, S :≤0.0010%, P :≤0.015%, N :≤0.005%, surplus Fe.
Gained hot rolled coil product thickness is 2mm, and properties of product meet yield strength Rp0.2: >=600MPa, tensile strength
Rm:750MPa, A >=15%, metallographic structure are ferrite.
Claims (7)
1. a kind of side for producing 600MPa grades of carriage body steel of hot rolling thin gauge completely without head bar strip continuous casting and rolling flow path based on ESP
Method, which is characterized in that comprise the following steps that:
(1) raw material is successively through converter smelting, LF refining；
(2) continuous casting；
(3) slab directly carries out hot rolling without soaking stove heating；
Hot rolled coil product thickness is 1.2mm~3.5mm；
The carriage body steel product meets yield strength Rp0.2: >=600MPa, tensile strength Rm:650-830MPa, A >=15%；
The carriage body comprises the following components in parts by weight component with steel: C:0.04%~0.06%, Si:0.15%~0.50%, Mn:
1.2%~1.9%, Als:0.02%~0.04%, Nb:0.015%~0.06%, Ti:0.04%~0.13%, S :≤
0.0010%, P :≤0.015%, N :≤0.005%, surplus Fe.
2. producing 600MPa grades of hot rolling thin gauge completely without head bar strip continuous casting and rolling flow path based on ESP according to described in claim 1
The method of carriage body steel, which is characterized in that the process conditions of the converter smelting, LF refining are as follows: converter 300t top and bottom complex blowing turns
Furnace is smelted, and the control of terminal C content is in 0.03-0.05%, and 1630-1660 DEG C of tapping temperature, the control of steel slag thickness is in 60mm or less out；
In 40-60min, refining terminates feed calcium line processing, soft blow >=10min after Calcium treatment, molten steel composition the control of LF refining time
Temperature qualification carries out continuous casting.
3. according to claim 1 produce hot rolling thin gauge 600MPa completely without head bar strip continuous casting and rolling flow path based on ESP
The method of grade carriage body steel, which is characterized in that in the continuous casting process, thickness of strand 90mm-110mm.
4. according to claim 1 produce hot rolling thin gauge 600MPa completely without head bar strip continuous casting and rolling flow path based on ESP
The method of grade carriage body steel, which is characterized in that in the continuous casting process, pulling rate is 4.5m/min~6.0m/min.
5. according to claim 1 produce hot rolling thin gauge 600MPa completely without head bar strip continuous casting and rolling flow path based on ESP
The method of grade carriage body steel, which is characterized in that in the step 3, roughing inlet temperature >=950 DEG C, induction heating outlet of still temperature
1050~1180 DEG C, 810 DEG C~870 DEG C of exit temperature at finishing, 580 DEG C~660 DEG C of coiling temperature of degree.
6. according to claim 1 produce hot rolling thin gauge 600MPa completely without head bar strip continuous casting and rolling flow path based on ESP
The method of grade carriage body steel, which is characterized in that the carriage body comprises the following components in parts by weight component with steel: C:0.04%~
0.06%, Si:0.2%~0.40%, Mn:1.5%~1.8%, Als:0.025%~0.03%, Nb:0.03%~
0.05%, Ti:0.06%~0.10%, S :≤0.0010%, P :≤0.015%, N :≤0.005%, surplus Fe.
7. according to claim 1 produce hot rolling thin gauge 600MPa completely without head bar strip continuous casting and rolling flow path based on ESP
The method of grade carriage body steel, which is characterized in that the carriage body comprises the following components in parts by weight component with steel: C:0.05%, Si:
0.30%, Mn:1.6%, Als:0.03%, Nb:0.04%, Ti:0.08%, S :≤0.0010%, P :≤0.015%, N :≤
0.005%, surplus Fe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934119.4A CN109055651A (en) | 2018-08-16 | 2018-08-16 | A method of 600MPa grades of carriage body steel of hot rolling thin gauge are produced completely without head bar strip continuous casting and rolling flow path based on ESP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934119.4A CN109055651A (en) | 2018-08-16 | 2018-08-16 | A method of 600MPa grades of carriage body steel of hot rolling thin gauge are produced completely without head bar strip continuous casting and rolling flow path based on ESP |
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| CN109055651A true CN109055651A (en) | 2018-12-21 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680219A (en) * | 2019-01-31 | 2019-04-26 | 日照钢铁控股集团有限公司 | A kind of production method of the 500MPa grade car hot radical without spangle high-strength galvanizing plate based on ESP production line |
| CN110004370A (en) * | 2019-04-30 | 2019-07-12 | 日照钢铁控股集团有限公司 | A method of 4.0mm S550GD+Z heat zinc coating plate is produced based on ESP producing line |
| CN113308646A (en) * | 2021-05-28 | 2021-08-27 | 攀钢集团攀枝花钢铁研究院有限公司 | High-fatigue-performance 700 MPa-grade hot-rolled automobile crossbeam steel strip and preparation method thereof |
| CN113322413A (en) * | 2021-05-28 | 2021-08-31 | 攀钢集团攀枝花钢铁研究院有限公司 | High-fatigue-performance 900 MPa-grade hot-rolled automobile beam steel strip and preparation method thereof |
| CN113322416A (en) * | 2021-05-31 | 2021-08-31 | 攀钢集团攀枝花钢铁研究院有限公司 | 800 MPa-grade hot-rolled automobile beam steel strip with high fatigue performance and preparation method thereof |
| CN113373375A (en) * | 2021-05-26 | 2021-09-10 | 攀钢集团攀枝花钢铁研究院有限公司 | 600 MPa-grade hot-rolled automobile beam steel strip with high fatigue performance and preparation method thereof |
| CN114645188A (en) * | 2022-02-08 | 2022-06-21 | 包头钢铁（集团）有限责任公司 | Method for efficiently producing hot-rolled steel strip for 2-4 mm extreme thin-specification high-quality stirring tank with tensile strength of 650MPa |
-
2018
- 2018-08-16 CN CN201810934119.4A patent/CN109055651A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680219A (en) * | 2019-01-31 | 2019-04-26 | 日照钢铁控股集团有限公司 | A kind of production method of the 500MPa grade car hot radical without spangle high-strength galvanizing plate based on ESP production line |
| CN110004370A (en) * | 2019-04-30 | 2019-07-12 | 日照钢铁控股集团有限公司 | A method of 4.0mm S550GD+Z heat zinc coating plate is produced based on ESP producing line |
| CN113373375A (en) * | 2021-05-26 | 2021-09-10 | 攀钢集团攀枝花钢铁研究院有限公司 | 600 MPa-grade hot-rolled automobile beam steel strip with high fatigue performance and preparation method thereof |
| CN113308646A (en) * | 2021-05-28 | 2021-08-27 | 攀钢集团攀枝花钢铁研究院有限公司 | High-fatigue-performance 700 MPa-grade hot-rolled automobile crossbeam steel strip and preparation method thereof |
| CN113322413A (en) * | 2021-05-28 | 2021-08-31 | 攀钢集团攀枝花钢铁研究院有限公司 | High-fatigue-performance 900 MPa-grade hot-rolled automobile beam steel strip and preparation method thereof |
| CN113322416A (en) * | 2021-05-31 | 2021-08-31 | 攀钢集团攀枝花钢铁研究院有限公司 | 800 MPa-grade hot-rolled automobile beam steel strip with high fatigue performance and preparation method thereof |
| CN114645188A (en) * | 2022-02-08 | 2022-06-21 | 包头钢铁（集团）有限责任公司 | Method for efficiently producing hot-rolled steel strip for 2-4 mm extreme thin-specification high-quality stirring tank with tensile strength of 650MPa |
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Application publication date: 20181221 |
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