CN113046639A - 460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof - Google Patents
460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN113046639A CN113046639A CN202110258882.1A CN202110258882A CN113046639A CN 113046639 A CN113046639 A CN 113046639A CN 202110258882 A CN202110258882 A CN 202110258882A CN 113046639 A CN113046639 A CN 113046639A
- Authority
- CN
- China
- Prior art keywords
- percent
- equal
- less
- steel
- mpa
- 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
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- C22C38/06—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
- C22C38/18—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
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses 460 MPa-grade hot-rolled steel for a ship structure and a manufacturing method thereof, which relate to the technical field of steel production and comprise the following chemical components in percentage by mass: c: 0.04 to 0.07 percent of Si: 0.20-0.30%, Mn: 1.55 to 1.75 percent of Nb, less than or equal to 0.012 percent of P, less than or equal to 0.0020 percent of S, and the weight ratio of Nb: 0.030-0.050%, V: 0.020-0.040%, Ti: 0.006-0.020%, Cr: 0.10% -0.30%, Ni: 0.30-0.40%, Mo is less than or equal to 0.10%, Cu: 0.20-0.30%, Al: 0.005-0.015%, Mg: 0.0008 to 0.0015 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities. Microalloying improves the cleanliness of molten steel, and a TMCP rolling process is adopted to obtain a steel plate mainly based on acicular ferrite, thereby meeting the performance requirements of the steel for high-strength wide and thick ship plates.
Description
Technical Field
The invention relates to the technical field of steel production, in particular to 460 MPa-grade hot-rolled steel for a ship body structure and a manufacturing method thereof.
Background
The rapid development of economy drives the vigorous development of the marine transportation industry, the development process of ships towards large-scale and high-speed is accelerated continuously, large-scale transportation ships need weldable and formable steel plates with high strength, high toughness and thick specifications, and the development of steel plates with high grade and excellent welding performance requirements becomes the trend of future development. The problems of strength reduction of a welding area, unqualified flaw detection of a welding and heat affected zone and the like frequently occur in the using process of the steel for the thick-specification ship plate, and the problem is brought to product development.
Disclosure of Invention
Aiming at the technical problems, the invention overcomes the defects of the prior art and provides 460 MPa-grade hot-rolled steel for ship structure, which comprises the following chemical components in percentage by mass: c: 0.04 to 0.07 percent of Si: 0.20-0.30%, Mn: 1.55 to 1.75 percent of Nb, less than or equal to 0.012 percent of P, less than or equal to 0.0020 percent of S, and the weight ratio of Nb: 0.030-0.050%, V: 0.020-0.040%, Ti: 0.006-0.020%, Cr: 0.10% -0.30%, Ni: 0.30-0.40%, Mo is less than or equal to 0.10%, Cu: 0.20-0.30%, Al: 0.005-0.015%, Mg: 0.0008 to 0.0015 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
The technical scheme of the invention is further defined as follows:
the 460 MPa-grade hot-rolled steel for the ship structure comprises the following chemical components in percentage by mass: c: 0.04-0.06%, Si: 0.20-0.30%, Mn: 1.55 to 1.65 percent of Nb, less than or equal to 0.010 percent of P, less than or equal to 0.0020 percent of S, and the mass percent of Nb: 0.030-0.040%, V: 0.030-0.040%, Ti: 0.006-0.018%, Cr: 0.10% -0.20%, Ni: 0.30-0.35%, Mo is less than or equal to 0.10%, Cu: 0.20-0.25%, Al: 0.005-0.013%, Mg: 0.0008 to 0.0013 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
The 460 MPa-grade hot-rolled steel for the ship structure comprises the following chemical components in percentage by mass: c: 0.045% -0.065%, Si: 0.20-0.30%, Mn: 1.60-1.70%, P is less than or equal to 0.011%, S is less than or equal to 0.0015%, Nb: 0.035% -0.045%, V: 0.025-0.035%, Ti: 0.008-0.018%, Cr: 0.15% -0.25%, Ni: 0.31-0.38%, Mo is less than or equal to 0.10%, Cu: 0.22-0.28%, Al: 0.006% -0.013%, Mg: 0.0009 to 0.0015 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
The 460 MPa-grade hot-rolled steel for the ship structure comprises the following chemical components in percentage by mass: c: 0.05 to 0.07 percent, Si: 0.20-0.30%, Mn: 1.65-1.75%, P is less than or equal to 0.010%, S is less than or equal to 0.0010%, Nb: 0.040% -0.050%, V: 0.030-0.040%, Ti: 0.008-0.020%, Cr: 0.20-0.30%, Ni: 0.35-0.40%, Mo is less than or equal to 0.10%, Cu: 0.25-0.30%, Al: 0.006-0.015%, Mg: 0.0009 to 0.0015 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
Another object of the present invention is to provide a method for manufacturing a 460 MPa-grade hot-rolled steel for a ship hull structure, comprising:
smelting by adopting an alkaline converter, carrying out LF slagging desulfurization and carrying out vacuum degassing treatment to obtain pure killed steel;
casting by a continuous casting machine, wherein the casting blank is low-power B0.5 grade or better;
and heating the casting blank to 1150-1250 ℃, the rough rolling temperature is 1080-1160 ℃, the secondary opening temperature is 750-850 ℃, the final rolling temperature is 750-820 ℃, the water inlet temperature is 730-760 ℃ and the red returning temperature is 590-630 ℃ through a heating furnace after surface detection.
The manufacturing method of the 460 MPa-grade hot-rolled steel for the ship structure has the advantage that the thickness of a steel plate product is 50-100 mm.
The manufacturing method of the 460 MPa-grade hot-rolled steel for the ship structure adopts a 260-320 mm section arc continuous casting machine.
The invention has the beneficial effects that:
(1) aiming at the characteristics of the steel for the thick-specification ship plate, the microalloying component design is carried out, the cleanliness of the product is improved, the center segregation of a casting blank is reduced, fine-grained acicular ferrite is formed in the rolling process, the grain size of the structure is refined, and the service performance of the steel for the high-strength thick-wall-specification ship plate is improved;
(2) according to the invention, a magnesium microalloying technology is adopted, and the inclusions are effectively modified through vacuum treatment, so that most of nano-scale micro inclusions smaller than 10 mu m are formed in a casting blank, the nano-scale micro inclusions become nucleation quality for structure transformation again in the welding process, and a structure type mainly comprising acicular ferrite is formed in the cooling process, so that the purity of molten steel is effectively improved, and the product performance is effectively improved;
(3) the invention adopts the magnesium alloying technology, reduces the harm of sulfur in steel, effectively spheroidizes A-type inclusions, and improves the internal quality of the steel;
(4) the low-carbon and low-phosphorus and sulfur design is beneficial to improving the core quality of the casting blank and improving the weldability of the product;
(5) the high manganese design is beneficial to refining the structure grain size and promoting the generation of acicular ferrite, the use of Nb, V and Ti is beneficial to refining the structure grain size, the magnesium alloying technology is combined with TMCP rolling and other means, the traditional aluminum refining mode is replaced in the structure grain refinement, the product grain is finer, and the molten steel is cleaner;
(6) the use of Cr, Ni and Cu in the invention is beneficial to improving the strength of products and the strength of welding areas after welding;
(7) the invention adopts thick casting blank section production, which is beneficial to improving the compression ratio, refining the structure grain size and improving the product strength, and the TMCP rolling process is beneficial to refining the structure grain size and promoting the production of acicular ferrite.
Drawings
FIG. 1 is a metallographic structure diagram of example 1 of the present invention.
Detailed Description
Example 1
The 460 MPa-grade hot-rolled steel for ship structure provided by the embodiment has a product thickness of 55mm, and comprises the following chemical components by mass percent: c: 0.046%, Si: 0.23%, Mn: 1.56%, P: 0.008%, S: 0.0012%, Nb: 0.033%, V: 0.039%, Ti: 0.016%, Cr: 0.12%, Ni: 0.31%, Mo: 0.10%, Cu: 0.23%, Al: 0.009%, Mg: 0.0011%, B: 0.0002%, N: 0.0033%, Ca is not added, and the balance is Fe and inevitable impurities.
The steel sheet manufacturing method includes:
smelting by adopting an alkaline converter, carrying out LF slagging desulfurization and carrying out vacuum degassing treatment to obtain low-carbon, low-phosphorus and low-sulfur pure killed steel;
casting by adopting an arc-shaped continuous casting machine with a section of 260mm, wherein the casting blank is low-power B0.5 grade;
after the surface inspection of the casting blank, the casting blank is heated to 1180 ℃ by a heating furnace, the rough rolling temperature is 1110 ℃, the secondary opening temperature is 836 ℃, the final rolling temperature is 815 ℃, the temperature of the entering water is 755 ℃, and the temperature of the re-reddening is 610 ℃.
Example 2
The 460 MPa-grade hot-rolled steel for ship structure provided by the embodiment has a product thickness of 70mm, and comprises the following chemical components by mass percent: c: 0.051%, Si: 0.21%, Mn: 1.67%, P: 0.010%, S: 0.0013%, Nb: 0.039%, V: 0.0295%, Ti: 0.009%, Cr: 0.19%, Ni: 0.37%, Mo: 0.008%, Cu: 0.26%, Al: 0.007%, Mg: 0.0013%, B: 0.0003%, N: 0.0039%, Ca is not added, and the balance is Fe and inevitable impurities.
The steel sheet manufacturing method includes:
smelting by adopting an alkaline converter, carrying out LF slagging desulfurization and carrying out vacuum degassing treatment to obtain low-carbon, low-phosphorus and low-sulfur pure killed steel;
casting by using a 320mm section arc continuous casting machine, wherein the casting blank is C0.5 grade;
after surface inspection, the casting blank is heated to 1171 ℃ by a heating furnace, the rough rolling temperature is 1096 ℃, the secondary opening temperature is 789 ℃, the final rolling temperature is 773 ℃, the water inlet temperature is 750 ℃ and the re-reddening temperature is 603 ℃.
Example 3
The 460 MPa-grade hot-rolled steel for ship structure provided by the embodiment has a product thickness of 86mm, and comprises the following chemical components in percentage by mass: c: 0.069%, Si: 0.29%, Mn: 1.73%, P: 0.006%, S: 0.0009%, Nb: 0.049%, V: 0.036%, Ti: 0.013%, Cr: 0.29%, Ni: 0.39%, Mo: 0.009%, Cu: 0.29%, Al: 0.011%, Mg: 0.0012%, B: 0.0001%, N: 0.0043%, Ca is not added, and the balance is Fe and inevitable impurities.
The steel sheet manufacturing method includes:
smelting by adopting an alkaline converter, carrying out LF slagging desulfurization and carrying out vacuum degassing treatment to obtain low-carbon, low-phosphorus and low-sulfur pure killed steel;
casting by using a 320mm section arc continuous casting machine, wherein the casting blank is of a C1.0 level;
and heating the casting blank to 1215 ℃ through a heating furnace after surface detection, wherein the rough rolling temperature is 1150 ℃, the secondary opening temperature is 778 ℃, the final rolling temperature is 760 ℃, the water inlet temperature is 745 ℃, and the re-reddening temperature is 598 ℃.
The results of the mechanical property tests of the products of example 1, example 2 and example 3 are shown in the following table:
the steel plate of the invention adopts a microalloying process to obtain pure molten steel of nano-scale oxides, and a rolling cooling process is adopted to obtain the steel plate mainly comprising acicular ferrite, as shown in figure 1, thereby meeting the requirements of large-line energy welding of products and customers.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. A460 MPa-grade hot-rolled steel for ship structure is characterized in that: the chemical components and the mass percentage are as follows: c: 0.04 to 0.07 percent of Si: 0.20-0.30%, Mn: 1.55 to 1.75 percent of Nb, less than or equal to 0.012 percent of P, less than or equal to 0.0020 percent of S, and the weight ratio of Nb: 0.030-0.050%, V: 0.020-0.040%, Ti: 0.006-0.020%, Cr: 0.10% -0.30%, Ni: 0.30-0.40%, Mo is less than or equal to 0.10%, Cu: 0.20-0.30%, Al: 0.005-0.015%, Mg: 0.0008 to 0.0015 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
2. The 460MPa grade steel for hot rolled hull structures according to claim 1, wherein: the chemical components and the mass percentage are as follows: c: 0.04-0.06%, Si: 0.20-0.30%, Mn: 1.55 to 1.65 percent of Nb, less than or equal to 0.010 percent of P, less than or equal to 0.0020 percent of S, and the mass percent of Nb: 0.030-0.040%, V: 0.030-0.040%, Ti: 0.006-0.018%, Cr: 0.10% -0.20%, Ni: 0.30-0.35%, Mo is less than or equal to 0.10%, Cu: 0.20-0.25%, Al: 0.005-0.013%, Mg: 0.0008 to 0.0013 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
3. The 460MPa grade steel for hot rolled hull structures according to claim 1, wherein: the chemical components and the mass percentage are as follows: c: 0.045% -0.065%, Si: 0.20-0.30%, Mn: 1.60-1.70%, P is less than or equal to 0.011%, S is less than or equal to 0.0015%, Nb: 0.035% -0.045%, V: 0.025-0.035%, Ti: 0.008-0.018%, Cr: 0.15% -0.25%, Ni: 0.31-0.38%, Mo is less than or equal to 0.10%, Cu: 0.22-0.28%, Al: 0.006% -0.013%, Mg: 0.0009 to 0.0015 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
4. The 460MPa grade steel for hot rolled hull structures according to claim 1, wherein: the chemical components and the mass percentage are as follows: c: 0.05 to 0.07 percent, Si: 0.20-0.30%, Mn: 1.65-1.75%, P is less than or equal to 0.010%, S is less than or equal to 0.0010%, Nb: 0.040% -0.050%, V: 0.030-0.040%, Ti: 0.008-0.020%, Cr: 0.20-0.30%, Ni: 0.35-0.40%, Mo is less than or equal to 0.10%, Cu: 0.25-0.30%, Al: 0.006-0.015%, Mg: 0.0009 to 0.0015 percent, less than or equal to 0.0005 percent of B, less than or equal to 0.0050 percent of N, no Ca, and the balance of Fe and inevitable impurities.
5. A manufacturing method of 460 MPa-level hot-rolled steel for ship structure is characterized in that: application to any one of claims 1 to 4, comprising:
smelting by adopting an alkaline converter, carrying out LF slagging desulfurization and carrying out vacuum degassing treatment to obtain pure killed steel;
casting by a continuous casting machine, wherein the casting blank is low-power B0.5 grade or better;
and heating the casting blank to 1150-1250 ℃, the rough rolling temperature is 1080-1160 ℃, the secondary opening temperature is 750-850 ℃, the final rolling temperature is 750-820 ℃, the water inlet temperature is 730-760 ℃ and the red returning temperature is 590-630 ℃ through a heating furnace after surface detection.
6. The manufacturing method of the 460 MPa-grade hot-rolled steel for ship hull structures according to claim 5, characterized in that: the thickness of the steel plate product is 50-100 mm.
7. The manufacturing method of the 460 MPa-grade hot-rolled steel for ship hull structures according to claim 5, characterized in that: an arc-shaped continuous casting machine with a section of 260-320 mm is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110258882.1A CN113046639A (en) | 2021-03-11 | 2021-03-11 | 460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110258882.1A CN113046639A (en) | 2021-03-11 | 2021-03-11 | 460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113046639A true CN113046639A (en) | 2021-06-29 |
Family
ID=76511006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110258882.1A Pending CN113046639A (en) | 2021-03-11 | 2021-03-11 | 460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113046639A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113444975A (en) * | 2021-07-02 | 2021-09-28 | 东北大学 | Pre-heating-free high-strength hydroelectric steel with low carbon equivalent weight of 600MPa grade before welding and manufacturing method thereof |
| CN114855085A (en) * | 2022-05-19 | 2022-08-05 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN114892082A (en) * | 2022-04-28 | 2022-08-12 | 湖南华菱湘潭钢铁有限公司 | Large-thickness 460 MPa-grade steel plate for ocean engineering and production method thereof |
| WO2023087979A1 (en) * | 2021-11-22 | 2023-05-25 | 南京钢铁股份有限公司 | X80-grade hot-bent elbow having excellent welding performance, and manufacturing method therefor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11193441A (en) * | 1997-12-26 | 1999-07-21 | Nippon Steel Corp | Steel plate for hull with excellent shock absorption capacity |
| JP2007177299A (en) * | 2005-12-28 | 2007-07-12 | Kobe Steel Ltd | Steel material superior in corrosion resistance and brittle fracture initiation property for ship |
| CN102482751A (en) * | 2009-11-20 | 2012-05-30 | 新日本制铁株式会社 | Thick steel plate for ship hull and process for production thereof |
| CN102534371A (en) * | 2012-01-04 | 2012-07-04 | 莱芜钢铁集团有限公司 | Mg-containing steel plate for TMCP (Thermal Mechanical Control Processing) type E460 ultrahigh-strength ship structure and production method thereof |
| JP2013049894A (en) * | 2011-08-31 | 2013-03-14 | Jfe Steel Corp | High toughness steel for heavy heat input welding and method for manufacturing the same |
| CN109321817A (en) * | 2017-07-31 | 2019-02-12 | 东北大学 | A kind of steel plate suitable for ultra-large line energy welding and its manufacturing method |
| CN111440986A (en) * | 2020-04-22 | 2020-07-24 | 河钢股份有限公司 | High heat input welding EH460 grade ship plate steel and preparation method thereof |
| CN111926259A (en) * | 2020-08-20 | 2020-11-13 | 钢铁研究总院 | Low alloy steel for high heat input welding and preparation method thereof |
-
2021
- 2021-03-11 CN CN202110258882.1A patent/CN113046639A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11193441A (en) * | 1997-12-26 | 1999-07-21 | Nippon Steel Corp | Steel plate for hull with excellent shock absorption capacity |
| JP2007177299A (en) * | 2005-12-28 | 2007-07-12 | Kobe Steel Ltd | Steel material superior in corrosion resistance and brittle fracture initiation property for ship |
| CN102482751A (en) * | 2009-11-20 | 2012-05-30 | 新日本制铁株式会社 | Thick steel plate for ship hull and process for production thereof |
| JP2013049894A (en) * | 2011-08-31 | 2013-03-14 | Jfe Steel Corp | High toughness steel for heavy heat input welding and method for manufacturing the same |
| CN102534371A (en) * | 2012-01-04 | 2012-07-04 | 莱芜钢铁集团有限公司 | Mg-containing steel plate for TMCP (Thermal Mechanical Control Processing) type E460 ultrahigh-strength ship structure and production method thereof |
| CN109321817A (en) * | 2017-07-31 | 2019-02-12 | 东北大学 | A kind of steel plate suitable for ultra-large line energy welding and its manufacturing method |
| CN111440986A (en) * | 2020-04-22 | 2020-07-24 | 河钢股份有限公司 | High heat input welding EH460 grade ship plate steel and preparation method thereof |
| CN111926259A (en) * | 2020-08-20 | 2020-11-13 | 钢铁研究总院 | Low alloy steel for high heat input welding and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113444975A (en) * | 2021-07-02 | 2021-09-28 | 东北大学 | Pre-heating-free high-strength hydroelectric steel with low carbon equivalent weight of 600MPa grade before welding and manufacturing method thereof |
| WO2023087979A1 (en) * | 2021-11-22 | 2023-05-25 | 南京钢铁股份有限公司 | X80-grade hot-bent elbow having excellent welding performance, and manufacturing method therefor |
| CN114892082A (en) * | 2022-04-28 | 2022-08-12 | 湖南华菱湘潭钢铁有限公司 | Large-thickness 460 MPa-grade steel plate for ocean engineering and production method thereof |
| CN114855085A (en) * | 2022-05-19 | 2022-08-05 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN114855085B (en) * | 2022-05-19 | 2023-08-15 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113046639A (en) | 460 MPa-grade hot-rolled steel for ship structure and manufacturing method thereof | |
| CN112048664B (en) | Normalized-state delivery FH36 steel plate for 100-one 120 mm-thick offshore wind power pipe pile and preparation method thereof | |
| CN113046655B (en) | Wide and thick pipeline steel with excellent low-temperature toughness and manufacturing method thereof | |
| CN112877601B (en) | A low yield strength ratio marine steel plate with excellent low temperature toughness and its manufacturing method | |
| EP3789508A1 (en) | Yield strength 460 mpa grade hot-rolled high-toughness low-temperature-resistant h-beam and preparation method therefor | |
| CN108070789B (en) | Ultrafine grain super-thick steel with yield strength not less than 480MPa and preparation method thereof | |
| CN109338215B (en) | High-strength steel plate with thickness of 8-25 mm and low yield ratio for tank car and manufacturing method thereof | |
| CN111286676A (en) | Production method of high crack-arresting marine steel plate | |
| WO2023097979A1 (en) | Corrosion-resistant high-strength steel sheet weldable with high heat input and used for ocean engineering, and preparation method therefor | |
| CN109518087B (en) | Low-temperature low-alloy high-strength corrosion-resistant oil field valve body and forging process thereof | |
| WO2021189621A1 (en) | S355g10+n-thickness steel plate for offshore structure and production method therefor | |
| CN116791009B (en) | Large-thickness steel plate suitable for ultra-large heat input welding and production method thereof | |
| CN104032212B (en) | Steel for railway vehicle and preparation method of steel | |
| CN113549828A (en) | A kind of ultra-high strength marine steel with low yield ratio and manufacturing method thereof | |
| CN113249638A (en) | Manufacturing method of thick-wall high-strength ship plate steel for high heat input welding | |
| CN111349859B (en) | A kind of composite billet rolling large thickness 500MPa grade high Z-direction layered performance low temperature container steel plate and its manufacturing method | |
| CN114959418B (en) | A kind of anti-seawater corrosion fatigue high-strength steel for ships and its manufacturing method | |
| CN111411302A (en) | 690 MPa-grade steel for pressure vessel for high heat input welding and manufacturing method thereof | |
| CN113046653B (en) | Pipeline steel with excellent high heat input welding performance and manufacturing method thereof | |
| CN115216711A (en) | Thick steel plate for normalizing Q345-grade pressure vessel and production method thereof | |
| CN112853218B (en) | Steel for high-speed bullet train bogie and manufacturing method thereof | |
| CN107675097B (en) | High-strength steel Q690D steel plate with good side bending performance and production method thereof | |
| CN113528958A (en) | Hot-rolled wire rod for high-strength wear-resistant steel welding wire and production method thereof | |
| CN116426831A (en) | Steel for thick-wall low-temperature deep sea pipeline and production method thereof | |
| CN113755759A (en) | Thick-specification high-toughness low-alloy high-strength structural steel and production 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 |
Application publication date: 20210629 |
|
| RJ01 | Rejection of invention patent application after publication |