CN111139400A - Low-carbon equivalent SA537CL1 steel plate and production method thereof - Google Patents
Low-carbon equivalent SA537CL1 steel plate and production method thereof Download PDFInfo
- Publication number
- CN111139400A CN111139400A CN201911357147.5A CN201911357147A CN111139400A CN 111139400 A CN111139400 A CN 111139400A CN 201911357147 A CN201911357147 A CN 201911357147A CN 111139400 A CN111139400 A CN 111139400A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- sa537cl1
- equal
- rolling
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C22C38/06—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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- 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 Steel (AREA)
Abstract
The invention discloses a low-carbon equivalent SA537CL1 steel plate and a production method thereof, wherein the steel plate comprises the following chemical components in percentage by mass: c: 0.17% -0.20%, Si: 0.20-0.35%, Mn: 0.70-1.35%, P is less than or equal to 0.020%, S is less than or equal to 0.015%, Al: 0.020% -0.050%, Nb: 0.012% -0.020%, V: 0.015-0.030 percent of the total carbon content Ceq, less than or equal to 0.40 percent of the total carbon content Ceq, and the balance of Fe and inevitable impurities. The production process flow comprises the working procedures of molten steel refining, controlled rolling and controlled cooling and normalizing heat treatment. The invention not only ensures that the strength of the steel plate meets the standard requirement, but also has good welding performance, and has excellent impact toughness at the low temperature of minus 30 ℃, thereby having considerable economic benefit and wide social benefit.
Description
Technical Field
The invention belongs to the technical field of metal materials, and particularly relates to a low-carbon equivalent SA537CL1 steel plate and a production method thereof.
Background
Along with the development of national economy, higher and higher requirements are put forward on the safety of equipment, for steel, along with the reduction of carbon equivalent, the weldability of a steel plate is more excellent, and meanwhile, the good low-temperature impact toughness can ensure that the equipment is not easy to break in cold regions, so that the safety of the equipment is improved.
Disclosure of Invention
The invention provides a low-carbon equivalent SA537CL1 steel plate, which comprises the following chemical components in percentage by mass: c: 0.17% -0.20%, Si: 0.20-0.35%, Mn: 0.70-1.35%, P is less than or equal to 0.020%, S is less than or equal to 0.015%, Al: 0.020% -0.050%, Nb: 0.012% -0.020%, V: 0.015-0.030 percent of the total carbon content Ceq, less than or equal to 0.40 percent of the total carbon content Ceq, and the balance of Fe and inevitable impurities.
Note: carbon equivalent Ceq = C + Mn/6+ (Cr + Mo + V)/5 + (Ni + Cu)/15.
The thickness of the steel plate is 10-40 mm.
The yield strength of the steel plate is more than or equal to 345MPa, the tensile strength is 485-620 MPa, the elongation is more than or equal to 22%, and the transverse impact energy at minus 30 ℃ is more than or equal to 60J.
The production process of the steel plate comprises the steps of molten steel refining, billet heating, steel plate rolling, cooling after steel plate rolling and normalizing heat treatment;
the molten steel refining process comprises the following steps: the holding time of the white slag is more than or equal to 25min, and the holding time is more than or equal to 15min when the vacuum degree is below 66 Pa.
A billet heating step of the steel sheet: the maximum heating temperature of the steel billet is 1270 ℃, the soaking temperature is 1240-1260 ℃, and the heating time is more than or equal to 9 min/cm.
The steel plate rolling process comprises the following steps: the two-stage rolling process is adopted, the initial rolling temperature of the first stage is 1030-1100 ℃, the initial rolling temperature of the second stage is 850-880 ℃, the final rolling temperature is 800-840 ℃, and the maximum pass reduction rate is more than or equal to 15%.
The cooling process after the steel plate is rolled comprises the following steps: and (5) after the steel plate is rolled, adding water, and cooling the steel plate to 670-710 ℃ by water.
The steel plate normalizing process comprises the following steps: the heat preservation temperature Ac3+ (30-50) DEG C, and the heat preservation time is 2.0-2.5 min/mm. Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the method controls lower carbon equivalent, increases pass reduction rate of rolling by a strengthening heating and controlled rolling and controlled cooling process under the condition of only adding Nb less than 0.020% and V less than 0.030% of microalloy elements, refines ferrite grains to be more than or equal to 8.5 grade, and cools in water after rolling to prevent the grains from further growing up, obtains refined grain structures, compensates for strength reduction caused by low carbon equivalent, ensures that the strength of the steel plate meets standard requirements, has good welding performance, has excellent impact toughness at the low temperature of-30 ℃, and has good economic benefit and social benefit.
The welding performance of steel is improved by reducing the carbon equivalent, and the steel has good low-temperature impact toughness, so that the production cost is reduced, and the safety of equipment is improved.
The method has simple production process, low content of alloy elements and micro-alloy, and improves the economic benefit of enterprises.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a metallographic structure diagram (500 times) of a steel sheet prepared in example 2.
FIG. 2 is a metallographic structure diagram (500 times) of a steel sheet prepared in example 6.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The low-carbon equivalent SA537CL1 steel plate and the production method thereof have the thickness specification of 10mm and comprise the following chemical components in percentage by mass: c: 0.17%, Si: 0.25%, Mn: 0.95%, P: 0.012%, S: 0.008%, Al: 0.050%, Nb: 0.012%, V: 0.015, Ceq: 0.375, and the balance of Fe and inevitable impurities.
(1) A refining procedure: the white slag is maintained for 25min, and the vacuum degree is below 66Pa, and the white slag is maintained for 15 min.
(2) A heating procedure: the heating temperature of the steel billet is 1270 ℃ at most, the soaking temperature is 1240 ℃, and the heating time is 9 min/cm.
(3) A rolling procedure: a two-stage rolling process is adopted; the initial rolling temperature of the first stage is 1050 ℃, the initial rolling temperature of the second stage is 880 ℃, the final rolling temperature is 835 ℃, and the maximum pass reduction rate is 15%.
(4) And (3) cooling after rolling: after rolling, the steel is cooled to 705 ℃ by water.
(5) Normalizing: the heat preservation temperature is Ac3+30 ℃, and the heat preservation time is 2.5 min/mm.
The indexes of the steel plate obtained in the embodiment such as mechanical properties are shown in table 1, and the grain size is 9.5 grade.
Example 2
The low-carbon equivalent SA537CL1 steel plate and the production method thereof have the thickness specification of 15mm and comprise the following chemical components in percentage by mass: c: 0.18%, Si: 0.20%, Mn: 1.25%, P: 0.008%, S: 0.005%, Al: 0.020%, Nb: 0.015%, V: 0.025, Ceq: 0.390, and the balance of Fe and inevitable impurities.
(1) A refining procedure: the white slag is maintained for 30min, and the vacuum degree is below 66Pa for 18 min.
(2) A heating procedure: the heating temperature of the steel billet is 1270 ℃ at most, the soaking temperature is 1260 ℃, and the heating time is 10 min/cm.
(3) A rolling procedure: a two-stage rolling process is adopted; the initial rolling temperature of the first stage is 1100 ℃, the initial rolling temperature of the second stage is 865 ℃, the final rolling temperature is 840 ℃, and the maximum pass reduction rate is 16%.
(4) And (3) cooling after rolling: cooling the rolled steel to 670 ℃.
(5) Normalizing: the heat preservation temperature is Ac3+50 ℃, and the heat preservation time is 2.0 min/mm.
The indexes of the steel plate obtained in the embodiment such as mechanical properties are shown in table 1, and the grain size is 8.5 grade.
Example 3
The low-carbon equivalent SA537CL1 steel plate and the production method thereof have the thickness specification of 20mm and comprise the following chemical components in percentage by mass: c: 0.20%, Si: 0.29%, Mn: 0.70%, P: 0.020%, S: 0.003%, Al: 0.025%, Nb: 0.018%, V: 0.030, Ceq: 0.385, and the balance Fe and inevitable impurities.
(1) A refining procedure: the white slag is maintained for 32min, and the vacuum degree is below 66Pa for 16 min.
(2) A heating procedure: the heating temperature of the steel billet is 1270 ℃ at the maximum, the soaking temperature is 1245 ℃, and the heating time is 9 min/cm.
(3) A rolling procedure: a two-stage rolling process is adopted; the initial rolling temperature of the first stage is 1030 ℃, the initial rolling temperature of the second stage is 850 ℃, the final rolling temperature is 800 ℃, and the maximum pass reduction rate is 16%.
(4) And (3) cooling after rolling: after rolling, the steel is cooled to 710 ℃ by water.
(5) Normalizing: the heat preservation temperature is Ac3+35 ℃, and the heat preservation time is 2.3 min/mm.
The indexes of the steel plate obtained in the embodiment, such as mechanical properties, are shown in table 1, and the grain size is 9.0 grade.
Example 4
The low-carbon equivalent SA537CL1 steel plate and the production method thereof have the thickness specification of 30mm and comprise the following chemical components in percentage by mass: c: 0.19%, Si: 0.35%, Mn: 1.12%, P: 0.010%, S: 0.006%, Al: 0.035%, Nb: 0.020%, V: 0.018, Ceq: 0.392, and the balance Fe and unavoidable impurities.
(1) A refining procedure: the white slag is maintained for 29min, and the vacuum degree is below 66Pa for 20 min.
(2) A heating procedure: the heating temperature of the steel billet is 1270 ℃ at the maximum, the soaking temperature is 1245 ℃, and the heating time is 10 min/cm.
(3) A rolling procedure: a two-stage rolling process is adopted; the initial rolling temperature of the first stage is 1060 ℃, the initial rolling temperature of the second stage is 876 ℃, the final rolling temperature is 810 ℃, and the maximum pass reduction rate is 18%.
(4) And (3) cooling after rolling: after rolling, the steel is cooled to 685 ℃ by water.
(5) Normalizing: the heat preservation temperature is Ac3+45 ℃, and the heat preservation time is 2.2 min/mm.
The indexes of the steel plate obtained in the embodiment such as mechanical properties are shown in table 1, and the grain size is 10.5 grade.
Example 5
The low-carbon equivalent SA537CL1 steel plate and the production method thereof have the thickness specification of 40mm and comprise the following chemical components in percentage by mass: c: 0.17%, Si: 0.32%, Mn: 1.35%, P: 0.007%, S: 0.015%, Al: 0.043%, Nb: 0.015%, V: 0.023, Ceq: 0.400, and the balance of Fe and inevitable impurities.
(1) A refining procedure: the white slag is maintained for 38min, and the vacuum degree is below 66Pa, and the white slag is maintained for 17 min.
(2) A heating procedure: the heating temperature of the steel billet is 1270 ℃ at most, the soaking temperature is 1250 ℃, and the heating time is 11 min/cm.
(3) A rolling procedure: a two-stage rolling process is adopted; the initial rolling temperature of the I stage is 1080 ℃, the initial rolling temperature of the II stage is 862 ℃, the final rolling temperature is 827 ℃, and the maximum pass reduction rate is 18%.
(4) And (3) cooling after rolling: after rolling, the steel is cooled to 690 ℃.
(5) Normalizing: the heat preservation temperature is Ac3+35 ℃, and the heat preservation time is 2.4 min/mm.
The indexes of the steel plate obtained in the embodiment such as mechanical properties are shown in table 1, and the grain size is 8.5 grade.
Example 6
The low-carbon equivalent SA537CL1 steel plate and the production method thereof have the thickness specification of 25mm and consist of the following chemical components in percentage by mass: c: 0.18%, Si: 0.28%, Mn: 1.20%, P: 0.0018%, S: 0.003%, Al: 0.025%, Nb: 0.016%, V: 0.026, Ceq: 0.395, and the balance of Fe and inevitable impurities.
(1) A refining procedure: the white slag is maintained for 35min, and the vacuum degree is below 66Pa for 25 min.
(2) A heating procedure: the heating temperature of the steel billet is 1270 ℃ at most, the soaking temperature is 1240 ℃, and the heating time is 10 min/cm.
(3) A rolling procedure: a two-stage rolling process is adopted; the initial rolling temperature of the first stage is 1050 ℃, the initial rolling temperature of the second stage is 855 ℃, the final rolling temperature is 825 ℃, and the maximum pass reduction rate is 15%.
(4) And (3) cooling after rolling: after rolling, the steel is cooled to 705 ℃ by water.
(5) Normalizing: the heat preservation temperature is Ac3+40 ℃, and the heat preservation time is 2.3 min/mm.
The indexes of the steel plate obtained in the embodiment, such as mechanical properties, are shown in table 1, and the grain size is 10.0 grade.
Example 7
The low-carbon equivalent SA537CL1 steel plate and the production method thereof have the thickness specification of 35mm and comprise the following chemical components in percentage by mass: c: 0.17%, Si: 0.20%, Mn: 1.25%, P: 0.0010%, S: 0.004%, Al: 0.033%, Nb: 0.017%, V: 0.022, Ceq: 0.391, and the balance of Fe and inevitable impurities.
(1) A refining procedure: the white slag is maintained for 30min, and the vacuum degree is below 66Pa for 18 min.
(2) A heating procedure: the heating temperature of the steel billet is 1260 ℃ at most, the soaking temperature is 1240 ℃, and the heating time is 10.5 min/cm.
(3) A rolling procedure: a two-stage rolling process is adopted; the initial rolling temperature of the first stage is 1060 ℃, the initial rolling temperature of the second stage is 865 ℃, the final rolling temperature is 831 ℃, and the maximum pass reduction rate is 16%.
(4) And (3) cooling after rolling: after rolling, the steel is cooled to 685 ℃ by water.
(5) Normalizing: the heat preservation temperature is Ac3+35 ℃, and the heat preservation time is 2.2 min/mm.
The indexes of the steel plate obtained in the embodiment such as mechanical properties are shown in table 1, and the grain size is 9.5 grade.
TABLE 1 mechanical Properties of the steel sheets of the examples
Experiments prove that: the production method of the steel plate has the advantages of simple manufacturing process, lower contents of alloy elements and micro-alloy, low production cost, good welding performance and low-temperature toughness of the steel plate, capability of completely meeting the standard and safety requirements, realization of batch production and good economic benefit and social benefit.
Claims (7)
1. The low-carbon equivalent SA537CL1 steel plate is characterized by comprising the following chemical components in percentage by mass: c: 0.17% -0.20%, Si: 0.20-0.35%, Mn: 0.70-1.35%, P is less than or equal to 0.020%, S is less than or equal to 0.015%, Al: 0.020% -0.050%, Nb: 0.012% -0.020%, V: 0.015-0.030 percent of the total carbon content Ceq, less than or equal to 0.40 percent of the total carbon content Ceq, and the balance of Fe and inevitable impurities.
2. The low carbon equivalent SA537CL1 steel plate according to claim 1, wherein the steel plate has a thickness of 10-40 mm.
3. The low-carbon-equivalent SA537CL1 steel plate according to claim 1, wherein the yield strength of the steel plate is not less than 345MPa, the tensile strength is 485-620 MPa, the elongation is not less than 22%, and the transverse impact energy at-30 ℃ is not less than 60J.
4. The method for producing the low carbon equivalent SA537CL1 steel plate according to any one of claims 1 to 3, characterized in that the steel plate production process comprises molten steel refining, billet heating, steel plate rolling, steel plate post-rolling cooling and normalizing heat treatment process;
the steel plate rolling process comprises the following steps: a two-stage rolling process is adopted, wherein the initial rolling temperature of the first stage is 1030-1100 ℃, the initial rolling temperature of the second stage is 850-880 ℃, the final rolling temperature is 800-840 ℃, and the maximum pass reduction rate is more than or equal to 15%;
the cooling process after the steel plate is rolled comprises the following steps: and (5) after the steel plate is rolled, adding water, and cooling the steel plate to 670-710 ℃ by water.
5. The method for producing the SA537CL1 steel plate with low carbon equivalent according to claim 4, wherein the molten steel refining process: the holding time of the white slag is more than or equal to 25min, and the holding time is more than or equal to 15min when the vacuum degree is below 66 Pa.
6. The method for producing the SA537CL1 steel plate with a low carbon equivalent weight as set forth in claim 4, wherein the billet heating step of the steel plate comprises: the maximum heating temperature of the steel billet is 1270 ℃, the soaking temperature is 1240-1260 ℃, and the heating time is more than or equal to 9 min/cm.
7. The method for producing the SA537CL1 steel plate with low carbon equivalent according to claim 4, characterized in that the steel plate normalizing process comprises the following steps: the heat preservation temperature Ac3+ (30-50) DEG C, and the heat preservation time is 2.0-2.5 min/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357147.5A CN111139400A (en) | 2019-12-25 | 2019-12-25 | Low-carbon equivalent SA537CL1 steel plate and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357147.5A CN111139400A (en) | 2019-12-25 | 2019-12-25 | Low-carbon equivalent SA537CL1 steel plate and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111139400A true CN111139400A (en) | 2020-05-12 |
Family
ID=70520009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911357147.5A Pending CN111139400A (en) | 2019-12-25 | 2019-12-25 | Low-carbon equivalent SA537CL1 steel plate and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111139400A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51126320A (en) * | 1975-04-28 | 1976-11-04 | Nippon Steel Corp | Process for producing high tensile strength steel plate with excellent weldability and bendability |
| JPS61139648A (en) * | 1984-12-11 | 1986-06-26 | Kawasaki Steel Corp | Low carbon extremely thick steel plate superior in strength and weldability |
| CN101323929A (en) * | 2007-06-14 | 2008-12-17 | 舞阳钢铁有限责任公司 | High strength steel plate for big thickness tall building structure and production method thereof |
| CN101956130A (en) * | 2010-09-25 | 2011-01-26 | 舞阳钢铁有限责任公司 | Large-thickness rolled steel plate instead of case one for large-sized ball mill and production method thereof |
| CN106591723A (en) * | 2016-12-14 | 2017-04-26 | 舞阳钢铁有限责任公司 | SA516Gr70 steel plate meeting high mold welding conditions and production method thereof |
| CN107245652A (en) * | 2017-05-23 | 2017-10-13 | 舞阳钢铁有限责任公司 | The big high die welding performance SA516Gr60 steel plates of thickness and its production method |
| CN108385027A (en) * | 2018-01-26 | 2018-08-10 | 舞阳钢铁有限责任公司 | A kind of E grades of ship structure steel plates of controlled rolling type and its production method |
-
2019
- 2019-12-25 CN CN201911357147.5A patent/CN111139400A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51126320A (en) * | 1975-04-28 | 1976-11-04 | Nippon Steel Corp | Process for producing high tensile strength steel plate with excellent weldability and bendability |
| JPS61139648A (en) * | 1984-12-11 | 1986-06-26 | Kawasaki Steel Corp | Low carbon extremely thick steel plate superior in strength and weldability |
| CN101323929A (en) * | 2007-06-14 | 2008-12-17 | 舞阳钢铁有限责任公司 | High strength steel plate for big thickness tall building structure and production method thereof |
| CN101956130A (en) * | 2010-09-25 | 2011-01-26 | 舞阳钢铁有限责任公司 | Large-thickness rolled steel plate instead of case one for large-sized ball mill and production method thereof |
| CN106591723A (en) * | 2016-12-14 | 2017-04-26 | 舞阳钢铁有限责任公司 | SA516Gr70 steel plate meeting high mold welding conditions and production method thereof |
| CN107245652A (en) * | 2017-05-23 | 2017-10-13 | 舞阳钢铁有限责任公司 | The big high die welding performance SA516Gr60 steel plates of thickness and its production method |
| CN108385027A (en) * | 2018-01-26 | 2018-08-10 | 舞阳钢铁有限责任公司 | A kind of E grades of ship structure steel plates of controlled rolling type and its production method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103014554B (en) | Low-yield-ratio high-tenacity steel plate and manufacture method thereof | |
| CN101649420B (en) | Ultra-strength, high toughness and low yield ratio steel and steel plate and manufacturing method thereof | |
| CN103352167A (en) | Low-yield ratio and high-strength steel for bridges and manufacturing method thereof | |
| CN111304531B (en) | Hot-rolled H-shaped steel with yield strength of 550MPa and production method thereof | |
| WO2022011935A1 (en) | High-strength container thick plate having excellent core toughness, and manufacturing method | |
| CN114657472B (en) | Marine ultrahigh-strength low-temperature steel with excellent fatigue performance and manufacturing method thereof | |
| CN114574665B (en) | Marine high-strength and high-toughness low-temperature steel with excellent fatigue performance and manufacturing method | |
| CN110306117B (en) | High-uniformity steel plate for super-thick structure and manufacturing method thereof | |
| CN110863135B (en) | High-nickel steel for low-temperature container and manufacturing method thereof | |
| CN110358971B (en) | Low-carbon ultrahigh-strength steel with 1300 MPa-grade yield strength and preparation method thereof | |
| WO2013044641A1 (en) | High-strength and high-toughness steel plate with yield strength being 700 mpa and manufacturing method thereof | |
| CN103882294A (en) | Ni-saving type low-temperature steel plate and preparation method thereof | |
| CN103014553B (en) | High-strength and high-toughness steel plate with 630 Mpa-level yield strength and preparation method of steel plate | |
| CN109487163B (en) | Direct quenching type 800 MPa-level yield structural steel plate and production method thereof | |
| CN109988968B (en) | Low-carbon equivalent large-thickness Q690E-grade high-strength steel plate and production method thereof | |
| CN114737130B (en) | 355MPa low-temperature steel and manufacturing method thereof | |
| JPS6059018A (en) | Production of cu-added steel having excellent weldability and low-temperature toughness | |
| CN111500938B (en) | Channel steel with yield strength of 420MPa for bridge and production method | |
| CN111139400A (en) | Low-carbon equivalent SA537CL1 steel plate and production method thereof | |
| CN103014538B (en) | A kind of yield strength 960MPa grade high-strength steel plate and manufacture method thereof | |
| CN110964985A (en) | Molybdenum-free low-alloy wear-resistant steel plate and production method thereof | |
| CN111647813B (en) | TMCP process ultrahigh-strength steel with yield strength of more than 800MPa and production method thereof | |
| JPH07173534A (en) | Production of ni-containing steel sheet excellent in toughness and workability | |
| CN116200662B (en) | Tempered high-performance bridge weathering steel with low yield ratio and manufacturing method thereof | |
| CN116574978B (en) | Multi-stage heat treatment fine grain pressure vessel steel plate and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200512 |