CN109023115B - hot-rolled template pull sheet steel and manufacturing method thereof - Google Patents
hot-rolled template pull sheet steel and manufacturing method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 18
- 238000009749 continuous casting Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 16
- 238000005266 casting Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000009628 steelmaking Methods 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229910001566 austenite Inorganic materials 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 4
- 238000001953 recrystallisation Methods 0.000 claims description 4
- 238000010583 slow cooling Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 2
- 229910052759 nickel Inorganic materials 0.000 claims 2
- 239000000047 product Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 10
- 238000005097 cold rolling Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910001562 pearlite Inorganic materials 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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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
-
- 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
- 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
- C22C38/04—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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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Abstract
The invention relates to steel for hot-rolled template pull tabs and a manufacturing method thereof, wherein the steel for the hot-rolled template pull tabs comprises, by weight, 0.22-0.75% of C, 0.17-1.60% of Si, 0.20-1.50% of Mn, 0.50-0.85% of C + Si/3+ Mn/6, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.55% of Cr, less than or equal to 0.55% of Ni, less than or equal to 0.20% of Cu, and the balance of iron and inevitable impurities.
Description
Technical Field
The invention belongs to the technical field of steel manufacturing, and particularly relates to types of steel for hot-rolled template pull tabs and a manufacturing method thereof.
Background
Since the 20 th century and the 80 th century, with the domestic rise of high-rise buildings, the building structure in China is shifted from a brick-concrete structure to a cast-in-place concrete structure with good earthquake resistance and fire resistance, less steel consumption and low cost, and the template technology matched with the cast-in-place concrete structure is also developed at a high speed. The aluminum alloy template is rapidly developed by the advantages of light weight, convenient construction, high turnover rate, friendly environmental resources, good concrete surface quality and the like. The template pull piece is used as an important component of an aluminum alloy template system, plays a role in fixing the template, requires enough strength to prevent the template from shifting and expanding, is convenient to install and dismantle, improves the construction efficiency, is low in price and reduces the construction cost. However, at present, the steel for the template pull sheet is lack of specifications, the purchasing raw materials of enterprises have high randomness, performance fluctuation is large, the template is easy to break on a construction site, the template is displaced and expanded, and even a great safety quality accident of template collapse is caused. Therefore, the development of a novel high-performance low-cost steel for a template pull tab, which has a tensile strength of more than 950MPa and is manufactured at a cost close to that of plain carbon steel such as Q345 hot rolled plate, is urgent.
201410152167.X discloses steel for building template pull tabs and a production process thereof, wherein the steel comprises 0.20-0.30% of C, 0.6-1.0% of Si, 1.2-1.6% of Mn, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.25% of residual element Cr in the steel, less than or equal to 0.30% of Ni, less than or equal to 0.15% of Cu, and the balance of iron and inevitable impurities, the production process comprises (1) smelting end point mass percentages of C more than 0.08%, S less than 0.030% and P less than or equal to 0.020%, and (2) casting blank heating temperature of 1200-1300 ℃, rolling temperature of 1120-1180 ℃, rough rolling seven passes, total reduction rate of 78-82%, final rolling temperature of 870-970 ℃, coiling temperature of-720 ℃, total reduction rate of (3) of 48-52%, strip stamping forming and cold rolling after cold rolling, the scheme adopts the idea of designing the steel for high-low-carbon steel for templates, the steel, the production cost of Si is 1-6.48%, and the reduction rate of the high-cold rolling alloy is ensured.
Disclosure of Invention
The invention aims to solve the technical problem of providing types of steel for hot-rolled template pull tabs and a manufacturing method thereof to realize the manufacturing of the template pull tabs with high performance and low cost aiming at the defects in the prior art.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
hot-rolled template pull-tab steel is provided, which comprises, by weight, 0.22-0.75% of C, 0.17-1.60% of Si, 0.20-1.50% of Mn, 0.50-0.85% of C + Si/3+ Mn/6, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.55% of Cr, less than or equal to 0.55% of Ni, less than or equal to 0.20% of Cu, and the balance of iron and inevitable impurities.
Preferably, the steel for the hot-rolled template pull tab comprises the following chemical components in percentage by weight: c: 0.40-0.70%, Si: 0.17-0.61%, Mn: 0.30-0.75%, 0.50-0.85% of C + Si/3+ Mn/6, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.55% of Cr, less than or equal to 0.55% of Ni, less than or equal to 0.20% of Cu, and the balance of iron and inevitable impurities.
, the steel for the hot-rolled template pull tab preferably comprises, by weight, 0.50-0.65% of C, 0.17-0.37% of Si, 0.36-0.61% of Mn, 0.50-0.85% of C + Si/3+ Mn/6, 0.035% or less of P, 0.035% or less of S, 0.55% or less of Cr, 0.55% or less of Ni, 0.20% or less of Cu, and the balance of iron and inevitable impurities.
The function of each element in the invention is as follows:
carbon mainly plays a role in improving the strength of steel, carbon mainly forms a pearlite structure during hot rolling, the pearlite is subjected to deformation strengthening after cold rolling, partial carbide is decomposed, the carbon permeates into ferrite and strengthens the ferrite through solid solution, the carbon content is too low, the strength does not meet the requirement, and the carbon enters a peritectic zone to easily generate continuous casting billet cracks, meanwhile, the plasticity and the toughness of the steel are reduced due to the increase of carbon element, so that the pulling piece is favorable for the removal work of the pulling piece.
Si is a main deoxidizer, and the content of Si in the steel is more than %, so that the preferable range of Si content is controlled to be 0.17-0.61%, and the further step is limited to be 0.17-0.37%.
Mn is a good deoxidizer and is contained in 0.20-1.50% like , but Mn is easily subjected to center segregation of a plate blank in the continuous casting process to reduce the stamping performance of the material, so that the preferable range of Mn content is 0.30-0.75%, and the further step is limited to be 0.36-0.61%.
C. The three elements of Si and Mn can improve the strength and increase the cold processing hardening, but the efficiency is different, and the effect is obvious when the three elements are mutually matched, so that the control is required to be between 0.50 and 0.85 percent according to the formula C + Si/3+ Mn/6.
The invention also provides a manufacturing method of the steel for the hot-rolled template pull sheet, which mainly comprises the following process steps of steel making, continuous casting, heating, hot rolling, cooling and forming, wherein the process requirements of each stage are as follows:
1) smelting: the steel-making components meet the component design, and the steel-making components are continuously cast into a casting blank, wherein: the continuous casting steel casting temperature is 1499-1542 ℃, and the thickness of the continuous casting billet is 50-150 mm;
2) the continuous casting blank enters a heating furnace before complete austenite transformation, the heating temperature is 1100-1280 ℃, and the time of the casting blank in the furnace is 20-150 min;
3) carrying out 0-4 times of rough rolling in the complete recrystallization area, wherein the reduction rate of each time is 45-55%, the thickness of the final finish rolling is 2.0mm, the reduction rate is less than 10%, and the final rolling temperature is 820-915 ℃;
4) carrying out laminar cooling, coiling and slow cooling, wherein the termination temperature of the laminar cooling is 500-710 ℃, the cooling rate is more than or equal to 30 ℃/s, and the coiling temperature is 500-650 ℃;
5) and (6) stamping and forming.
The hot-rolled template pull sheet steel has the beneficial effects that 1, the steel product for the hot-rolled template pull sheet provided by the invention has the structure of bainite + pearlite or pearlite + ferrite, the yield strength is 821-902 MPa, the tensile strength is 990-1153 MPa, the elongation is 5-7%, 180-degree cold bending cracking is beneficial to the removal of a template and belongs to favorable performance, and the requirements of conventional products like are just opposite, the performance fluctuation among product batches is small, the manufacturing method is beneficial to the processing and manufacturing process of the product, meanwhile, the damage and failure in the using process are reduced, and the use accidents are avoided.2. the manufacturing method realizes that the total manufacturing time from molten iron to a steel plate raw material is shortened from three to five days to 3 hours by short-process steel rolling and laminar cooling control performance, the total production period is shortened from ten days to five days, the manufacturing period is shortened by half, and meanwhile, the process flows of acid pickling, multi-pass cold rolling annealing, spheroidization and the like are reduced by removing the cold rolling process, and the process cost is reduced by.
Drawings
FIG. 1 is an SEM photograph of a hot-rolled sheet steel product for a template tab prepared in example 3 of the present invention;
fig. 2 is an OM view of the hot rolled sheet steel product for template pull as prepared in example 5.
Detailed Description
In order to make the technical solution of the present invention better understood, the present invention is further described in detail with reference to the attached drawings.
The steel for the hot-rolled template pull tab comprises the following chemical components in percentage by weight: c: 0.22-0.75%, Si: 0.17-1.60%, Mn: 0.20-1.50%, 0.50-0.85% of C + Si/3+ Mn/6, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.55% of Cr, less than or equal to 0.55% of Ni, less than or equal to 0.20% of Cu, and the balance of iron and inevitable impurities.
The manufacturing method comprises the following process steps:
1) smelting: the steel-making components meet the component design, and the steel-making components are continuously cast into a casting blank, wherein: the continuous casting steel casting temperature is 1499-1542 ℃, and the thickness of the continuous casting billet is 50-150 mm;
2) the continuous casting blank enters a heating furnace before complete austenite transformation, the heating temperature is 1100-1280 ℃, and the time of the casting blank in the furnace is 20-150 min;
3) carrying out 0-4 times of rough rolling in the complete recrystallization zone, wherein the reduction rate of each time is 45-55%, the thickness of the final finish rolling is 2.0mm, the reduction rate is less than 10%, and the final rolling temperature is 820-;
4) carrying out laminar cooling, coiling and slow cooling, wherein the termination temperature of the laminar cooling is 500-710 ℃, the cooling rate is more than or equal to 30 ℃/s, and the coiling temperature is 500-650 ℃;
5) and (6) stamping and forming.
Two low-carbon steels and medium-carbon steels were used as comparative examples 1 to 3.
The chemical compositions of the steel for hot-rolled stencil sheets of examples 1 to 6 and comparative examples 1 to 3 are shown in Table 1 (in weight percent), the manufacturing process conditions are shown in Table 2, and the properties of the steel products thus produced are shown in Table 3.
TABLE 1 List of the main components of the steel products prepared in examples 1-6 and comparative examples 1-3
| Steel product | C(％) | Si(％) | Mn(％) | P(％) | S(％) | C+Si/3+Mn/6(％) |
| Example 1 | 0.22 | 1.0 | 1.0 | 0.018 | 0.008 | 0.72 |
| Example 2 | 0.3 | 1.0 | 0.9 | 0.018 | 0.008 | 0.78 |
| Example 3 | 0.4 | 0.61 | 0.75 | 0.018 | 0.008 | 0.73 |
| Example 4 | 0.5 | 0.37 | 0.61 | 0.018 | 0.008 | 0.73 |
| Example 5 | 0.65 | 0.37 | 0.36 | 0.018 | 0.008 | 0.83 |
| Example 6 | 0.7 | 0.17 | 0.30 | 0.018 | 0.008 | 0.81 |
| Comparative example 1 | 0.06 | 0.18 | 0.45 | 0.018 | 0.008 | 0.20 |
| Comparative example 2 | 0.05 | 0.36 | 0.54 | 0.018 | 0.008 | 0.26 |
| Comparative example 3 | 0.4 | 0.17 | 0.20 | 0.018 | 0.008 | 0.49 |
TABLE 2 production Process conditions for examples 1-6 and comparative examples 1-3
TABLE 3 Properties of the Steel products prepared in examples 1-6 and comparative examples 1-3
As shown in fig. 1, which is an SEM photograph of the steel product prepared in example 3, it can be seen that the structure thereof is bainite + pearlite, and the performance requirement that the tensile strength is greater than 950MPa is achieved; as shown in fig. 2, which is an OM diagram of the steel product prepared in example 5, it can be seen that the metallographic structure thereof is pearlite + a small amount of ferrite, and the performance requirement that the tensile strength is greater than 950MPa is also achieved; meanwhile, the steel products can be guaranteed to be smoothly disconnected in the cold bending process, and the smooth process of removing the template after construction is guaranteed. The steel products prepared in comparative examples 1 and 2 can not meet the performance requirements, and the cold bending fracture can not be guaranteed; while comparative example 3 satisfied the cold bend fracture requirements, the performance was slightly lower and failed to meet the strength requirements.
From the above results, the steel product provided by the present embodiment can satisfy the performance and the use requirements, and compared with the prior art, the present embodiment eliminates the cold rolling process in the manufacturing process flow, thereby reducing the processes of pickling, annealing, cold rolling and the like, and realizing the reduction of the manufacturing cycle by half and the reduction of the manufacturing cost by 1000 yuan/ton.
Claims (4)
- The steel for the hot-rolled template pull tab is characterized by comprising, by weight, 0.22-0.75% of C, 0.17-1.60% of Si, 0.20-1.50% of Mn, 0.50-0.85% of C + Si/3+ Mn/6=0.50, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.55% of Cr, less than or equal to 0.55% of Ni, less than or equal to 0.20% of Cu, and the balance of iron and inevitable impurities;the manufacturing method mainly comprises the following process steps of steel making, continuous casting, heating, hot rolling, cooling and forming, and the process requirements of each stage are as follows:1) smelting: the steel-making components meet the component design, and the steel-making components are continuously cast into a casting blank, wherein: the continuous casting steel casting temperature is 1499-1542 ℃, and the thickness of the continuous casting billet is 50-150 mm;2) the continuous casting blank enters a heating furnace before complete austenite transformation, the heating temperature is 1100-1280 ℃, and the time of the casting blank in the furnace is 20-150 min;3) carrying out 0-4 times of rough rolling in the complete recrystallization area, wherein the reduction rate of each time is 45-55%, the thickness of the final finish rolling is 2.0mm, the reduction rate is less than 10%, and the final rolling temperature is 820-915 ℃;4) carrying out laminar cooling, coiling and slow cooling, wherein the termination temperature of the laminar cooling is 500-710 ℃, the cooling rate is more than or equal to 30 ℃/s, and the coiling temperature is 500-650 ℃;5) and (6) stamping and forming.
- 2. The steel for a hot-rolled template pull tab according to claim 1, characterized by comprising the following chemical components in percentage by weight: c: 0.40-0.70%, Si: 0.17-0.61%, Mn: 0.30-0.75%, C + Si/3+ Mn/6= 0.50-0.85%, P is less than or equal to 0.035%, S is less than or equal to 0.035%, Cr is less than or equal to 0.55%, Ni is less than or equal to 0.55%, Cu is less than or equal to 0.20%, and the balance of iron and inevitable impurities.
- 3. The steel for hot-rolled template tabs according to claim 2, characterized by comprising the following chemical components in percentage by weight: c: 0.50-0.65%, Si: 0.17 to 0.37%, Mn: 0.36-0.61%, C + Si/3+ Mn/6= 0.50-0.85%, P is less than or equal to 0.035%, S is less than or equal to 0.035%, Cr is less than or equal to 0.55%, Ni is less than or equal to 0.55%, Cu is less than or equal to 0.20%, and the balance of iron and inevitable impurities.
- 4, A method for manufacturing a steel for a hot-rolled form panel as claimed in any of claims 1-3, wherein the main process steps include steel making, continuous casting, heating, hot rolling, cooling and forming, and the process requirements of each stage are as follows:1) smelting: the steel-making components meet the component design, and the steel-making components are continuously cast into a casting blank, wherein: the continuous casting steel casting temperature is 1499-1542 ℃, and the thickness of the continuous casting billet is 50-150 mm;2) the continuous casting blank enters a heating furnace before complete austenite transformation, the heating temperature is 1100-1280 ℃, and the time of the casting blank in the furnace is 20-150 min;3) carrying out 0-4 times of rough rolling in the complete recrystallization area, wherein the reduction rate of each time is 45-55%, the thickness of the final finish rolling is 2.0mm, the reduction rate is less than 10%, and the final rolling temperature is 820-915 ℃;4) carrying out laminar cooling, coiling and slow cooling, wherein the termination temperature of the laminar cooling is 500-710 ℃, the cooling rate is more than or equal to 30 ℃/s, and the coiling temperature is 500-650 ℃;5) and (6) stamping and forming.
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| CN109763065A (en) * | 2019-01-04 | 2019-05-17 | 武汉钢铁有限公司 | A kind of template pulling-on piece hot-rolled steel and production method |
| CN109778063B (en) * | 2019-01-04 | 2020-09-08 | 武汉钢铁有限公司 | Steel for cold-rolled template pull sheet produced by CSP and method |
| CN110592350A (en) * | 2019-10-23 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Rolling method of high-strength hot-rolled steel sheet |
| CN110578096B (en) * | 2019-10-24 | 2021-04-30 | 广东韶钢松山股份有限公司 | Non-quenched and tempered steel for crankshaft, crankshaft forging and preparation process thereof |
| CN116121657A (en) * | 2022-11-25 | 2023-05-16 | 重庆钢铁股份有限公司 | A kind of fine structure uniformity 50 fine carbon steel strip and its production method |
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| JPH0813033A (en) * | 1994-06-29 | 1996-01-16 | Sumitomo Metal Ind Ltd | Method for manufacturing high strength hot rolled steel sheet |
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| JP2018121912A (en) * | 2017-02-01 | 2018-08-09 | 日新製鋼株式会社 | Steel sheet for golf club face, golf club face and manufacturing method thereof, and golf club head |
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