CN106119494A - Yield strength >=250MPa level hot-dip galvanizing sheet steel and manufacture method thereof - Google Patents
Yield strength >=250MPa level hot-dip galvanizing sheet steel and manufacture method thereof Download PDFInfo
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- CN106119494A CN106119494A CN201610682812.8A CN201610682812A CN106119494A CN 106119494 A CN106119494 A CN 106119494A CN 201610682812 A CN201610682812 A CN 201610682812A CN 106119494 A CN106119494 A CN 106119494A
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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
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold 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
-
- 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
- C22C38/04—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
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses yield strength >=250MPa level hot-dip galvanizing sheet steel and manufacture method thereof, the chemical composition of steel plate is by weight percentage: C:0.035～0.070%；Si≤0.050%；Mn:0.25～0.45%；P≤0.020%；S≤0.010%；Als:0.025～0.045%；N≤0.0060%, remaining is Fe and inevitable impurity, and steel plate is organized as ferrite, and grain size is 8.0 grades；The manufacture method of steel plate comprises the following steps: (1) molten iron pretreatment；(2) converter smelting；(3) RH stove refine；(4) continuous casting；(5) hot rolling；(6) cold rolling；(7) zinc-plated；The present invention, without adding the alloying elements such as Ti, Nb, coordinates reasonable process, produces low cost, stable performance, the hot-dip galvanizing sheet steel that plate shape is good.
Description
Technical field
The present invention relates to the production field of metallic plate (carrying), be specifically related to yield strength >=250MPa level hot-dip galvanizing sheet steel and
Its manufacture method.
Background technology
Zinc-plated high strength construction steel has good corrosion resistance, processability, weldability and coating performance etc., is widely used in house
Electricity structural member and building trade.Meanwhile, along with the market competition is more and more fierce, user meets use in galvanizing production performance
On the premise of requirement, increasingly harsher requirement be it is also proposed for product cost.
Now the technology of domestic published 200-300Mpa grade high-strength structural steel is made brief analysis.
Such as the Chinese invention patent of Publication No. CN104928576A, to disclose a kind of 260-330MPa level low alloy high-strength
The production method of steel, the weight/mass percentage composition of its chemical composition is: C 0.05～0.09%, Mn 0.15～0.60%, S≤
0.015%, P≤0.020%, Si≤0.50%, Nb≤0.020%, Ti≤0.020%, Als0.020～0.060%, N≤
30ppm, surplus is Fe and inevitable impurity；Described method includes hot rolling, pickling and cold-rolling, bell-type annealing peace bulk wight volume work
Sequence.This method gained low-alloy high-strength steel, yield strength is 260～330MPa, and tensile strength is 350～430MPa, has no progeny and stretches
Long rate is >=26.0%；Intensity and plasticity no-float.This method is mainly designed by the optimization of composition, by add Ti,
The alloying element costly such as Nb realizes the steady production of this product, good to obtain stable mechanical performance and cold forming capability
Cold rolling low-alloy high-strength steel.
Such as the patent of invention of Publication No. CN102719741A, disclose yield strength 220MPa level hot-dip galvanized high-strength steel,
Its chemical composition consists of by weight percentage: C:0.0008～0.003%, Si:0.07～0.10%, Mn:0.35～
0.50%, P:0.04～0.06%, Al:0.015～0.040%, Ti:0.02～0.04%, Nb:0.020～0.035%, B:
0.0005～0.002%, S 0.005%, N 0.004%, O 0.0030%, surplus Fe and inevitable impurity.The present invention
Also provide for the production method of above-mentioned yield strength 220MPa level hot-dip galvanized high-strength steel.The galvanizing high strength steel that the present invention develops
Both there is higher-strength, met the auto industry requirement to vehicle body complex structural member strength and stiffness, there is again good deep-draw
Performance, can smoothly complete complex deformation, and meanwhile, the product of the present invention has preferable anti-secondary processing brittleness ability, its secondary
Processing brittle temperature reaches less than-60 DEG C, it is possible to meet automobile requirements of one's work at low ambient temperatures；And this product has
Good corrosion resistance.
From technology disclosed above, traditional 200-300Mpa grade high-strength structural steel, low Si is generally used to become to set up separately
Meter, improves intensity by adding the alloying elements such as Ti, Nb, although can reach requirement of strength, but its production cost is higher.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that without adding the alloying elements such as Ti, Nb, coordinate even
Continuous rational hot dip galvanizing process, produces low cost, stable performance, yield strength >=250MPa level hot-galvanized steel that plate shape is good
Plate and manufacture method thereof.
To achieve these goals, the technical solution used in the present invention is:
Yield strength >=250MPa level hot-dip galvanizing sheet steel, the chemical composition of steel plate is by weight percentage: C:0.035～
0.070%；Si≤0.050%；Mn:0.25～0.45%；P≤0.020%；S≤0.010%；Als:0.025～0.045%；
N≤0.0060%, remaining is Fe and inevitable impurity；Steel plate is organized as ferrite, and grain size is 8.0 grades.
Preferably one, in the chemical composition of steel plate, the content of C, Si, Mn, P, S and Als is respectively as follows: C:
0.0545%；Si:0.0074%；Mn:0.3786%；P:0.0125%；S:0.0049%；Als:0.042%；N:0.002%.
Preferably one, in the chemical composition of steel plate, the content of C, Si, Mn, P, S and Als is respectively as follows: C:
0.0485%；Si:0.0114%；Mn:0.3085%；P:0.0147%；S:0.0058%；Als:0.035%；N:0.002%,
Remaining is Fe and inevitable impurity.
The mechanical property of hot-dip galvanizing sheet steel is: yield strength >=250MPa, tensile strength ＞ 330MPa, elongation percentage ＞
19%.
The manufacture method of yield strength >=250MPa level hot-dip galvanizing sheet steel, comprises the following steps:
(1) molten iron pretreatment: skim before requirement and after skim, reach target after desulfurizing iron；
(2) converter smelting: tapping process carries out deoxidation and composition adjustment, strengthens tapping pushing off the slag operation, and the bottom blowing of Argon station is stirred
Mix and top slag is tentatively reduced；
(3) RH stove refine: using light tupe, fine setting composition is to desired value, it is ensured that the broken unprecedented net circulation time is the least
In 6min；
(4) continuous casting: tundish temperature controls above 20-35 DEG C of target liquid phase line temperature；
(5) hot rolling: heating-up temperature is 1200 ± 20 DEG C；Finishing temperature is 890 ± 15 DEG C；Coiling temperature is 680 ± 20 DEG C；
(6) cold rolling: to use five passages cold rolling, roll total reduction ratio >=70%；
(7) zinc-plated: annealing temperature is 720 ± 10 DEG C.
In described step (1), reaching target after desulfurizing iron is S≤0.003%.
Preferably one, in described step (5), finishing temperature is 896 DEG C；Coiling temperature is 685 DEG C；Described
In step (6), total reduction ratio is 70%；In described step (7), annealing temperature is 735 DEG C.
The mechanical property of hot-dip galvanizing sheet steel is: yield strength is 288MPa, and tensile strength is 369MPa, and elongation percentage is
35.5%.
Preferably two, in described step (5), finishing temperature is 905 DEG C；Coiling temperature is 695 DEG C；Described
In step (6), total reduction ratio is 70%；In described step (7), annealing temperature is 732 DEG C.
The mechanical property of hot-dip galvanizing sheet steel is: yield strength is 310MPa, and tensile strength is 374MPa, and elongation percentage is
36.5%.
It is an advantage of the current invention that: the present invention, without adding the alloying elements such as Ti, Nb, coordinates hot rolling, pickling, five frames complete
Six roller cold continuous rollings are cold rolling and continuously dip coat zinc technology, design stable performance under low cost process route, and plate shape is good, surrender
The hot-dip galvanized high-strength steel plate of intensity >=250MPa rank.The steel band that the present invention obtains, thickness specification 0.3-2.5mm, mechanical property
Yield strength higher than 250MPa, tensile strength is higher than 330MPa, elongation percentage more than 19%, and tissue, based on ferrite, has
Good tissue and performance, it is possible to meet client and shape requirement.
Accompanying drawing explanation
Labelling in the content of width accompanying drawing each to description of the invention expression below and figure is briefly described:
Fig. 1 is the stress strain curve of the galvanized steel plain sheet that the embodiment of the present invention one obtains.
Fig. 2 is the stress strain curve of the galvanized steel plain sheet that the embodiment of the present invention two obtains.
Fig. 3 is the metallographic structure of the hot-dip galvanizing sheet steel that the embodiment of the present invention one obtains.
Fig. 4 is the metallographic structure of the hot-dip galvanizing sheet steel that the embodiment of the present invention two obtains.
Detailed description of the invention
Below against accompanying drawing, by the description to optimum embodiment, the detailed description of the invention of the present invention is made the most in detail
Thin explanation.
This yield strength >=250MPa level hot-dip galvanizing sheet steel, the chemical composition of steel plate is by weight percentage: C:0.035～
0.070%；Si≤0.050%；Mn:0.25～0.45%；P≤0.020%；S≤0.010%；Als:0.025～0.045%；
N≤0.0060%, remaining is Fe and inevitable impurity.
The manufacture method of yield strength >=250MPa level hot-dip galvanizing sheet steel, comprises the following steps:
(1) molten iron pretreatment: skim before requirement and after skim, reach target after desulfurizing iron；
(2) converter smelting: tapping process adds ferro-aluminum, mid-carbon fe-mn alloy carries out deoxidation and composition adjustment, strengthens tapping
Pushing off the slag operates, and top slag is tentatively reduced by Argon station Bottom Argon Stirring；
(3) RH stove refine: using light tupe, fine setting composition is to desired value, it is ensured that the broken unprecedented net circulation time is the least
In 6min；
(4) continuous casting: tundish temperature controls above 20-35 DEG C of target liquid phase line temperature；
(5) hot rolling: heating-up temperature is 1200 ± 20 DEG C；Finishing temperature is 890 ± 15 DEG C；Coiling temperature is 680 ± 20 DEG C；
(6) cold rolling: to use five passages cold rolling, roll total reduction ratio >=70%；
(7) zinc-plated: annealing temperature is 720 ± 10 DEG C.
In described step (1), reaching target after desulfurizing iron is S≤0.003%.
By accurately controlling the composition in steel, and by hot rolling, the complete six roller cold continuous rollings of five frames and continuous annealing, finishing work
Sequence produces high strength structure galvanized steel plain sheet；The steel band that the present invention obtains, hot-galvanized steel plate thickness is 0.3-2.5mm, hot-dip galvanizing sheet steel
Mechanical property be: yield strength >=250MPa, tensile strength ＞ 330MPa, elongation percentage ＞ 19%.
Now by optimum embodiment, the present invention is described.
Embodiment one
This yield strength >=250MPa level hot-dip galvanizing sheet steel and manufacture method thereof, the chemical composition of steel plate is by weight percentage
For: C:0.0545%；Si:0.0074%；Mn:0.3786%；P:0.0125%；S:0.0049%；Als:0.042%；N:
0.002%, remaining is Fe and inevitable impurity.
The manufacture method of steel plate comprises the following steps:
(1) molten iron pretreatment: skim before requirement and after skim, reach target after desulfurizing iron；
(2) converter smelting: tapping process adds ferro-aluminum, mid-carbon fe-mn alloy carries out deoxidation and composition adjustment, strengthens tapping
Pushing off the slag operates, and top slag is tentatively reduced by Argon station Bottom Argon Stirring；
(3) RH stove refine: using light tupe, fine setting composition is to desired value, it is ensured that the broken unprecedented net circulation time is the least
In 6min；
(4) continuous casting: tundish temperature controls more than target liquid phase line temperature 28 DEG C；
(5) hot rolling: heating-up temperature is 1200 DEG C；Finishing temperature is 899 DEG C；Coiling temperature is 685 DEG C；
(6) cold rolling: to use five passages cold rolling, rolling total reduction ratio is 70%；
(7) zinc-plated: annealing temperature is 735 DEG C.
In described step (1), reach after desulfurizing iron target be S be 0.003%.
The mechanical property of hot-dip galvanizing sheet steel is: yield strength is 288MPa, and tensile strength is 369MPa, and elongation percentage is
35.5%.
Embodiment two
This yield strength >=250MPa level hot-dip galvanizing sheet steel and manufacture method thereof, the chemical composition of steel plate is by weight percentage
For: C:0.0485%；Si:0.0114%；Mn:0.3085%；P:0.0147%；S:0.0058%；Als:0.035%；N:
0.002%, remaining is Fe and inevitable impurity.
The manufacture method of steel plate comprises the following steps:
(1) molten iron pretreatment: skim before requirement and after skim, reach target after desulfurizing iron；
(2) converter smelting: tapping process adds ferro-aluminum, mid-carbon fe-mn alloy carries out deoxidation and composition adjustment, strengthens tapping
Pushing off the slag operates, and top slag is tentatively reduced by Argon station Bottom Argon Stirring；
(3) RH stove refine: using light tupe, fine setting composition is to desired value, it is ensured that the broken unprecedented net circulation time is the least
In 6min；
(4) continuous casting: tundish temperature controls more than target liquid phase line temperature 35 DEG C；
(5) hot rolling: heating-up temperature is 1220 DEG C；Finishing temperature is 905 DEG C；Coiling temperature is 695 DEG C；
(6) cold rolling: to use five passages cold rolling, rolling total reduction ratio is 70%；
(7) zinc-plated: annealing temperature is 732 DEG C.
In described step (1), reach after desulfurizing iron target be S be 0.0028%.
The mechanical property of hot-dip galvanizing sheet steel is: yield strength is 310MPa, and tensile strength is 374MPa, and elongation percentage is
36.5%.
The chemical composition of the molten steel of embodiment one and embodiment two is shown in Table 1, and remaining is Fe and inevitable impurity element.
Table 1 embodiment chemical composition, wt%
| Embodiment | C | Si | Mn | P | S | Als | N |
| 1 | 0.0545 | 0.0074 | 0.3786 | 0.0125 | 0.0049 | 0.042 | 0.002 |
| 2 | 0.0485 | 0.0114 | 0.3085 | 0.0147 | 0.0058 | 0.035 | 0.002 |
In embodiment one and embodiment two, the technological parameter of manufacture method is shown in Table 2.
Table 2 product processes
The mechanical property of the product that embodiment one and embodiment two obtain is shown in Table three.
Table 3 product mechanical property
Above example one and two, after molten steel continuous casting, through CSP hot rolling, pickling and cold-rolling and continuous annealing, galvanizing by dipping,
Finishing operation produces galvanizing steel plate, and its metallograph is refering to explanation accompanying drawing 1 and accompanying drawing 2.
Accompanying drawing 1 metallograph understands, the steel band that embodiment one obtains, and it is organized as ferrite, and grain size number is 8.0
Level.
Accompanying drawing 2 metallograph understands, the steel band that embodiment two obtains, and it is organized as ferrite, and grain size number is 8.0
Level.
The present invention passes through rational Design of Chemical Composition, it is not necessary to add the alloying element such as Ti, Nb, coordinate hot rolling, pickling, five
The complete six roller cold continuous rollings of frame are cold rolling and continuously dip coat zinc technology, design stable performance under low cost process route, and plate shape is good
Good, the hot-dip galvanized high-strength steel plate of yield strength >=250MPa rank.The steel band that the present invention obtains, thickness specification 0.3-2.5mm, power
The yield strength learning performance more than 19%, is organized as ferrite higher than 330MPa, elongation percentage higher than 250MPa, tensile strength, tool
There are good tissue and performance, it is possible to meet client and shape requirement.
Obviously the present invention implements and is not subject to the restrictions described above, as long as have employed method design and the skill of the present invention
The improvement of the various unsubstantialities that art scheme is carried out, all within protection scope of the present invention.
Claims (10)
1. yield strength >=250MPa level hot-dip galvanizing sheet steel, it is characterised in that: the chemical composition of steel plate is by weight percentage: C:
0.035～0.070%；Si≤0.050%；Mn:0.25～0.45%；P≤0.020%；S≤0.010%；Als:0.025～
0.045%；N≤0.0060%, remaining is Fe and inevitable impurity；Steel plate is organized as ferrite, and grain size is 8.0 grades.
2. yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 1, it is characterised in that: the chemical composition of steel plate
The content of middle C, Si, Mn, P, S and Als is respectively as follows: C:0.0545%；Si:0.0074%；Mn:0.3786%；P:0.0125%；
S:0.0049%；Als:0.042%；N:0.002%.
3. yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 1, it is characterised in that: the chemical composition of steel plate
The content of middle C, Si, Mn, P, S and Als is respectively as follows: C:0.0485%；Si:0.0114%；Mn:0.3085%；P:0.0147%；
S:0.0058%；Als:0.035%；N:0.002%, remaining is Fe and inevitable impurity.
4. yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 1, it is characterised in that: the power of hot-dip galvanizing sheet steel
Performance is: yield strength >=250MPa, tensile strength ＞ 330MPa, elongation percentage ＞ 19%.
5. the manufacture method of the yield strength described in any one of claim 1-4 >=250MPa level hot-dip galvanizing sheet steel, its feature exists
In: comprise the following steps:
(1) molten iron pretreatment: skim before requirement and after skim, reach target after desulfurizing iron；
(2) converter smelting: tapping process carries out deoxidation and composition adjustment, strengthens tapping pushing off the slag operation, Argon station bottom blowing stirring pair
Top slag tentatively reduces；
(3) RH stove refine: using light tupe, fine setting composition is to desired value, it is ensured that the broken unprecedented net circulation time is not less than
6min；
(4) continuous casting: tundish temperature controls above 20-35 DEG C of target liquid phase line temperature；
(5) hot rolling: heating-up temperature is 1200 ± 20 DEG C；Finishing temperature is 890 ± 15 DEG C；Coiling temperature is 680 ± 20 DEG C；
(6) cold rolling: to use five passages cold rolling, roll total reduction ratio >=70%；
(7) zinc-plated: annealing temperature is 720 ± 10 DEG C.
6. the manufacture method of yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 5, it is characterised in that: described
In step (1), reaching target after desulfurizing iron is S≤0.003%.
7. the manufacture method of yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 5, it is characterised in that: described
In step (5), finishing temperature is 896 DEG C；Coiling temperature is 685 DEG C；In described step (6), total reduction ratio is 70%；Described
In step (7), annealing temperature is 735 DEG C.
8. the manufacture method of yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 7, it is characterised in that: hot dip
The mechanical property of zinc steel plate is: yield strength is 288MPa, and tensile strength is 369MPa, and elongation percentage is 35.5%.
9. the manufacture method of yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 5, it is characterised in that: described
In step (5), finishing temperature is 905 DEG C；Coiling temperature is 695 DEG C；In described step (6), total reduction ratio is 70%；Described
In step (7), annealing temperature is 732 DEG C.
10. the manufacture method of yield strength >=250MPa level hot-dip galvanizing sheet steel as claimed in claim 7, it is characterised in that: heat
The mechanical property of galvanized steel plain sheet is: yield strength is 310MPa, and tensile strength is 374MPa, and elongation percentage is 36.5%.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774715A (en) * | 2018-06-28 | 2018-11-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dip galvanizing sheet steel and its manufacturing method |
| CN110551946A (en) * | 2019-10-11 | 2019-12-10 | 马鞍山钢铁股份有限公司 | Production method of economical 350 MPa-grade high-toughness structural steel |
| CN112899562A (en) * | 2021-01-15 | 2021-06-04 | 山东钢铁集团日照有限公司 | Micro-carbon hot-dip galvanized steel strip with stable yield strength control and production method thereof |
| CN113528960A (en) * | 2021-07-09 | 2021-10-22 | 马鞍山钢铁股份有限公司 | Steel wire for mask nose bridge clamp and production method thereof |
| CN113718166A (en) * | 2020-05-25 | 2021-11-30 | 上海梅山钢铁股份有限公司 | Hot-dip aluminum-zinc steel plate with yield strength of 320MPa and manufacturing method thereof |
| CN114703426A (en) * | 2022-04-08 | 2022-07-05 | 马鞍山钢铁股份有限公司 | Zinc-aluminum-magnesium coating high-strength steel plate and method for efficiently producing high-strength steel plates with different strength levels |
| CN115094343A (en) * | 2022-05-26 | 2022-09-23 | 安阳钢铁集团有限责任公司 | Ultrathin wide-width high-strength continuous hot-dip galvanized steel for household appliances and production method thereof |
| CN116219278A (en) * | 2022-12-21 | 2023-06-06 | 本钢板材股份有限公司 | Hot galvanizing low-carbon high-strength steel for ton barrels and manufacturing method thereof |
| CN116623082A (en) * | 2023-05-17 | 2023-08-22 | 包头钢铁（集团）有限责任公司 | 250 MPa-grade hot galvanizing high-strength structural steel for container barrels and production method thereof |
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| CN113528960A (en) * | 2021-07-09 | 2021-10-22 | 马鞍山钢铁股份有限公司 | Steel wire for mask nose bridge clamp and production method thereof |
| CN114703426A (en) * | 2022-04-08 | 2022-07-05 | 马鞍山钢铁股份有限公司 | Zinc-aluminum-magnesium coating high-strength steel plate and method for efficiently producing high-strength steel plates with different strength levels |
| CN115094343A (en) * | 2022-05-26 | 2022-09-23 | 安阳钢铁集团有限责任公司 | Ultrathin wide-width high-strength continuous hot-dip galvanized steel for household appliances and production method thereof |
| CN116219278A (en) * | 2022-12-21 | 2023-06-06 | 本钢板材股份有限公司 | Hot galvanizing low-carbon high-strength steel for ton barrels and manufacturing method thereof |
| CN116623082A (en) * | 2023-05-17 | 2023-08-22 | 包头钢铁（集团）有限责任公司 | 250 MPa-grade hot galvanizing high-strength structural steel for container barrels and production method thereof |
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Application publication date: 20161116 |