CN110629002A - Method for producing low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP (thermal mechanical control processing) - Google Patents
Method for producing low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP (thermal mechanical control processing) Download PDFInfo
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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
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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
- 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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The invention relates to a method for producing a low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP (thermal mechanical control processing), which comprises the following steps of: molten iron pretreatment → BOF steel making → LF refining → RH vacuum treatment → continuous casting → slow cooling → inspection of casting blank, cleaning, judgment → heating → descaling → water cooling → rolling → water cooling → cold piling → flaw detection → spray printing identification → cutting sampling → warehousing. The deformation penetrates into the core through temperature difference rolling, the tissue form and distribution are precisely controlled through controlled cooling, the tissue uniformity in the thickness direction is improved, the core quality of the steel plate is improved, the mechanical properties of the steel plate meet the yield strength of 305-355 MPa, the tensile strength of 490-540 MPa, the elongation after fracture is 20-25%, the KV2 at the temperature of-40 ℃ is 90-150J, and the reduction of area is 26-45%; expensive micro-alloy elements or precious metals are not added, so that the alloy addition cost is low; the TMCP process is adopted for delivery, heat treatment is not needed, and the production period is short.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a process method for producing a low-compression-ratio lamellar tearing-resistant extra-thick plate based on a continuous casting billet TMCP (thermal mechanical control processing) process.
Background
With the rapid development of the industrialization of China, the demand of fields such as special equipment, building structures, ocean engineering, energy and power and the like for the ultra-thick steel plate is continuously increased, and higher requirements on the mechanical property, the welding property, the lamellar tearing resistance and the like of the steel plate are met. At present, steel plates with the thickness of more than 120mm are produced at home and abroad by methods of steel ingots, composite blanks and the like, but the problems of poor internal quality, low yield, long production period and the like of products cannot be solved.
The invention patent of publication No. CN 102330017A discloses a method for producing an extra-thick steel plate by using a casting blank under the condition of a small compression ratio, wherein the patent adopts a 300mm continuous casting blank to produce a 145mm extra-thick steel plate, and normalizing treatment is required; the adopted compression ratio is large, and meanwhile, a heat treatment process is adopted, so that the production period is long and the cost is high.
The invention patent of publication No. CN 105755375A discloses a super-thick steel plate with low compression ratio and high performance produced by a continuous casting billet and a manufacturing method thereof, wherein the patent adopts a 450mm continuous casting billet to produce a 250mm super-thick steel plate, and micro-alloy elements V are added, wherein the micro-alloy elements V are 0.02-0.05%, and Ni: 0.20-0.50%, and normalizing; in contrast, the adopted compression ratio is close, but the heat treatment is needed, expensive alloy elements V and Ni are added, the production period is long, and the cost is high.
Disclosure of Invention
The invention aims to provide a method for producing a low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP (thermal mechanical control processing), wherein an extra-thick steel plate is produced by adopting a continuous casting billet under the condition of a small compression ratio, and the extra-thick steel plate has the advantages of good internal quality, excellent mechanical property, shorter production period and lower cost.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for producing a low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP (thermal mechanical control processing) comprises the following steps: molten iron pretreatment → BOF steel making → LF refining → RH vacuum treatment → continuous casting → slow cooling → inspection of casting blank, cleaning, judgment → heating → descaling → water cooling → rolling → water cooling → cold piling → flaw detection → spray printing identification → cutting sampling → warehousing. Wherein:
smelting: smelting in a converter, top-bottom combined blowing, and fully decarbonizing and dephosphorizing; reducing the content of harmful elements/impurities by LF/RH refining, and carrying out microalloying;
continuous casting: the continuous casting process is characterized by protecting the casting, wherein the casting blank comprises the following chemical components in percentage by weight: c: 0.14 to 0.16%, Si: 0.10-0.40%, Mn: 1.30-1.60%, P is less than or equal to 0.012%, S is less than or equal to 0.003%, Al: 0.01 to 0.05%, Nb: 0.015 to 0.040%, Ti: 0.010-0.025%, less than or equal to 2ppm of [ H ], and the balance of Fe and inevitable impurities. The solidification tail end of the casting blank is pressed down by 8-10% of the total thickness of the casting blank, and the casting blank is slowly cooled for more than 36h after being off line;
heating: rapidly heating the casting blank, wherein the tapping temperature is 1200-1220 ℃, and controlling the central temperature difference of the surface of the tapped casting blank to be within 50 ℃;
rolling and cooling control: the surface temperature of a rough rolling initial rolling casting blank is lower than 1080 ℃, the cooling of the casting blank is accelerated by water in the rolling process, the reduction rate of two continuous passes is more than or equal to 16%, the surface temperature of the rough rolling final rolling casting blank is lower than 1000 ℃, the thickness of an intermediate blank/the thickness of a product is 1.2-1.3, the cooling of the intermediate blank is accelerated by water to the surface temperature of 830 ℃, the surface temperature of the intermediate blank returns to 860 ℃ for second-stage rolling, the water cooling of a rolled steel plate is carried out to 650-680 ℃, and then the steel plate is cooled by stack for more than;
and (3) heat treatment: no heat treatment is required.
Specifically, the thickness of the casting blank is 270mm, a steel plate with the thickness of 155mm is produced by a compression ratio of 1.74, the yield strength is 305-355 MPa, the tensile strength is 460-510 MPa, the elongation after fracture is 20-25%, the KV2 at minus 40 ℃ is 90-150J, and the reduction of area is 26-45%.
The chemical composition is one of the important factors influencing the comprehensive performance of the product, and limits the chemical composition of the invention, and is explained as follows.
C: carbon is one of the main factors influencing the performance of steel, and the strength is improved through solid solution strengthening; the carbon content is increased, so that the austenite critical cooling speed can be obviously reduced, the hardenability of the steel is enhanced, and the plasticity, the low-temperature toughness and the welding performance of the steel are also obviously reduced; in order to ensure the mechanical property and the core cooling effect of the super-thick steel plate and prevent the deterioration of the comprehensive performance, the carbon content is controlled to be 0.14-0.16%.
Si: silicon is one of effective deoxidizing and heat releasing elements in the steel making process, has a certain solid solution strengthening effect, but the surface quality, the welding performance and the low-temperature toughness of steel can be reduced due to the fact that the silicon content is too high, and the silicon content is controlled to be 0.10% -0.40%.
Mn: the manganese can refine grains, the strength and the low-temperature toughness of the steel are effectively improved, the casting blank segregation is easily caused when the manganese content is too high, a rolled strip-shaped structure is formed, and the lamellar tearing resistance is reduced, wherein the manganese content is controlled to be 1.30-1.60%.
P: phosphorus is an easily segregated element, increases the cold brittleness of steel, deteriorates the welding performance, and the content of phosphorus in steel should be strictly controlled.
S: sulfur causes hot shortness of steel, reduces ductility and toughness of steel, and the sulfur content in steel should be strictly controlled.
Al: the aluminum is one of effective deoxidizing elements in the steelmaking process, can effectively reduce the content of inclusions in steel and refine grains, but the content is too high, so that cracks are easily generated on the surface of a casting blank, and the content of the aluminum is controlled to be 0.01-0.05%.
Nb: niobium is one of the important elements for fine grain strengthening. 1. The austenite recrystallization temperature is increased, austenite recrystallization is prevented, grain growth is inhibited, and austenite grains are refined; 2. niobium carbonitride precipitates on dislocation and austenite grain boundary partialization, and strength and toughness are improved. But the content of niobium is too high, so that the casting blank is easy to generate surface cracks and the welding performance is deteriorated, and the content of niobium is controlled to be 0.015-0.040%.
Ti: the method produces strong precipitation strengthening and medium-level grain refining effects, improves the cold forming performance and the welding performance of steel, and controls the titanium content to be 0.010-0.025%.
The invention has the following beneficial effects: the method adopts a clean steel production technology, enables deformation to permeate into the core through temperature difference rolling, precisely controls the tissue form and distribution through controlled cooling, improves the tissue uniformity in the thickness direction, and improves the core quality of the steel plate, the mechanical properties of the steel plate meet the yield strength of 305-355 MPa, the tensile strength of 490-540 MPa, the elongation after fracture of 20-25%, the KV2 at the temperature of-40 ℃ is 90-150J, and the reduction of area is 26-45%; expensive micro-alloy elements or precious metals are not added, so that the alloy addition cost is low; the TMCP process is adopted for delivery, heat treatment is not needed, and the production period is short.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the scope of the present invention is not limited to these examples. All changes, modifications and equivalents that do not depart from the spirit of the invention are intended to be included within the scope thereof.
Example 1
The prepared ultra-thick laminated tear-resistant plate with the thickness of 155mm comprises the following chemical components: c: 0.16%, Si: 0.25%, Mn: 1.50%, P: 0.010%, S: 0.002%, Al: 0.035%, Nb: 0.035%, Ti: 0.018%, [ H ]: 1.5ppm, the balance being Fe and unavoidable impurities.
Smelting by a converter, refining by LF and RH, protecting and casting in the whole continuous casting process, wherein the gravity reduction rate of the solidified tail end of a casting blank is 9.5%, the thickness of the casting blank is 271.5mm, and performing heap cooling for 36 h.
Tapping the casting blank from a regenerative heating furnace to 1215 ℃, and calculating the temperature difference between the surface and the core of the casting blank by using a model to be 40 ℃.
Controlled rolling and controlled cooling process: the surface temperature of a rough rolling initial rolling casting blank is 1020 ℃, the cooling of the casting blank is accelerated by water in the rolling process, the temperature of the last rolling is 980 ℃, and the pass reduction rate is 16.0%; the thickness of the intermediate billet is 190mm, the cooling of the intermediate billet is directly accelerated by water to the surface temperature of 832 ℃, the intermediate billet moves on a roller way, the second stage rolling is started when the surface temperature reaches 862 ℃, the finish rolling temperature is 848 ℃, the steel plate is cooled by a vibration water cooling model after rolling, the surface temperature of the steel plate is 660 ℃, and then the steel plate is cooled for 48 hours.
And after the cooling is finished, sampling, inspecting the performance of the steel plate and carrying out nondestructive inspection, wherein the inspection meets the first-level inspection requirement in GB/T2970-2016, and the specific performance result of the steel plate is shown in tables 1-2.
Example 2
The prepared lamellar tearing resistant extra-thick plate with the thickness of 160mm comprises the following chemical components: c: 0.15%, Si: 0.30%, Mn: 1.55%, P: 0.011%, S: 0.002%, Al: 0.034%, Nb: 0.032%, Ti: 0.020%, [ H ]: 1.5ppm, the balance being Fe and unavoidable impurities.
The method comprises the following steps of smelting by a converter, refining by LF and RH, protective casting in the whole continuous casting process, 9.8% of the reduction ratio of the solidified tail end of a casting blank, 270.6mm of the thickness of the casting blank, and cooling by heaps for 37 h.
And (3) tapping the casting blank from the regenerative heating furnace to 1210 ℃, and calculating the temperature difference between the surface and the core of the casting blank by using the model to be 25 ℃.
Controlled rolling and controlled cooling process: the surface temperature of a rough rolling initial rolling casting blank is 1010 ℃, the cooling of the casting blank is accelerated by water in the rolling process, the temperature of the last rolling is 985 ℃, and the pass reduction rate is 16.2%; the thickness of the intermediate billet is 190mm, the cooling of the intermediate billet is directly accelerated by water to 830 ℃ of surface temperature, the intermediate billet moves on a roller way, the second-stage rolling is started when the surface temperature reaches 858 ℃, the final rolling temperature is 844 ℃, the steel plate is cooled by a vibration water cooling model after rolling, the surface temperature of the steel plate is cooled 658 ℃, and then the steel plate is cooled for 48 hours.
And after the cooling is finished, sampling, inspecting the performance of the steel plate and carrying out nondestructive inspection, wherein the inspection meets the first-level inspection requirement in GB/T2970-2016, and the specific performance result of the steel plate is shown in tables 1-2.
Example 3
The prepared 153 mm-thick lamellar tearing-resistant extra-thick plate comprises the following chemical components: c: 0.14%, Si: 0.10%, Mn: 1.60%, P: 0.012%, S: 0.003%, Al: 0.05%, Nb: 0.015%, Ti: 0.010%, [ H ]: 2ppm, the balance being Fe and unavoidable impurities.
Smelting by a converter, refining by LF and RH, protecting and casting in the whole continuous casting process, wherein the reduction ratio of the solidified tail end of a casting blank is 8 percent, the thickness of the casting blank is 271.0mm, and cooling by heaping for 36 h.
And (3) tapping the casting blank from the regenerative heating furnace to 1200 ℃, and calculating the temperature difference between the surface and the core of the casting blank by using a model to be 30 ℃.
Controlled rolling and controlled cooling process: the surface temperature of a rough rolling initial rolling casting blank is 1050 ℃, the cooling of the casting blank is accelerated by water in the rolling process, the temperature of the last rolling is 990 ℃, and the pass reduction rate is 16.5%; the thickness of the intermediate billet is 199mm, the intermediate billet is directly accelerated to be cooled to the surface temperature of 832 ℃ by water, the intermediate billet moves on a roller way, the second stage rolling is started when the surface temperature reaches 862 ℃, the finish rolling temperature is 848 ℃, the steel plate is cooled by a vibration water cooling model after the rolling, the surface temperature of the steel plate is finally cooled to 650 ℃, and then the steel plate is cooled for 48 hours.
And after the cooling is finished, sampling, inspecting the performance of the steel plate and carrying out nondestructive inspection, wherein the inspection meets the first-level inspection requirement in GB/T2970-2016, and the specific performance result of the steel plate is shown in tables 1-2.
Example 4
The chemical components of the prepared 156 mm-thick lamellar tearing-resistant extra-thick plate are as follows: c: 0.14%, Si: 0.10%, Mn: 1.60%, P: 0.012%, S: 0.003%, Al: 0.05%, Nb: 0.015%, Ti: 0.010%, [ H ]: 2ppm, the balance being Fe and unavoidable impurities.
Smelting by a converter, refining by LF and RH, protecting and casting in the whole continuous casting process, wherein the gravity reduction rate of the solidified tail end of a casting blank is 10%, the thickness of the casting blank is 270.5mm, and performing heap cooling for 36 h.
And (3) tapping the casting blank from a regenerative heating furnace to 1220 ℃, and calculating the temperature difference between the surface and the core of the casting blank by using a model to be 35 ℃.
Controlled rolling and controlled cooling process: the surface temperature of a rough rolling initial rolling casting blank is 1030 ℃, the cooling of the casting blank is accelerated by water in the rolling process, the temperature of the last rolling is 975 ℃, and the pass reduction rate is 16.4%; the thickness of the intermediate billet is 195mm, the cooling of the intermediate billet is directly accelerated by water to the surface temperature of 832 ℃, the intermediate billet moves on a roller way, the second stage rolling is started when the surface temperature reaches 862 ℃, the finish rolling temperature is 848 ℃, the steel plate is cooled by a vibration water cooling model after the rolling, the surface temperature of the steel plate is finally cooled by 680 ℃, and then the steel plate is cooled for 48 hours.
And after the cooling is finished, sampling, inspecting the performance of the steel plate and carrying out nondestructive inspection, wherein the inspection meets the first-level inspection requirement in GB/T2970-2016, and the specific performance result of the steel plate is shown in tables 1-2.
TABLE 1 tensile Properties of Steel sheets according to examples of the invention
| Examples | Thickness/mm | Yield strength/MPa | Tensile strength/MPa | Elongation after break/% |
| Example 1 | 155 | 315 | 490 | 26 |
| Example 2 | 160 | 318 | 500 | 26 |
| Example 3 | 153 | 355 | 540 | 24 |
| Example 4 | 156 | 324 | 520 | 25 |
TABLE 2 Low temperature toughness and reduction of area of Steel plates according to examples of the invention
Claims (3)
1. A method for producing a low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP is characterized by comprising the following steps: molten iron pretreatment → BOF steel making → LF refining → RH vacuum treatment → continuous casting → slow cooling → heating → rolling → water cooling → heap cooling; wherein the content of the first and second substances,
smelting and continuous casting: smelting through a converter, refining by LF and RH, protecting and casting in the whole continuous casting process, pressing 8-10% of the total thickness of a casting blank at the solidification tail end of the casting blank, and slowly cooling for more than 36h after the casting blank is discharged;
heating: rapidly heating the casting blank, wherein the tapping temperature is 1200-1220 ℃, and controlling the central temperature difference of the surface of the tapped casting blank to be within 50 ℃;
rolling and cooling control: the surface temperature of a rough rolling initial rolling casting blank is lower than 1080 ℃, the cooling of the casting blank is accelerated by water in the rolling process, the reduction rate of two continuous passes is more than or equal to 16%, the surface temperature of the rough rolling final rolling casting blank is lower than 1000 ℃, the thickness of an intermediate blank/the thickness of a product is 1.2-1.3, the cooling of the intermediate blank is accelerated by water to the surface temperature of 830 ℃, the surface temperature of the intermediate blank returns to 860 ℃ for second-stage rolling, the water cooling of a rolled steel plate is carried out to 650-680 ℃, and then the steel plate is cooled by stack for more than;
and (3) heat treatment: no heat treatment is required.
2. The method for producing the low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP (thermal mechanical control processing) according to claim 1, wherein the thickness of the casting blank is 270mm, the steel plate with the thickness of 155mm is produced at the compression ratio of 1.74, the yield strength is 305-355 MPa, the tensile strength is 460-510 MPa, the elongation after fracture is 20-25%, the KV2 at the temperature of-40 ℃ is 90-150J, and the reduction of area is 26-45%.
3. The method for producing the ultra-thick sheet with low compression ratio and laminar tear resistance based on TMCP according to claim 1, wherein the casting blank comprises the following chemical components in percentage by weight: 0.14 to 0.16%, Si: 0.10-0.40%, Mn: 1.30-1.60%, P is less than or equal to 0.012%, S is less than or equal to 0.003%, Al: 0.01 to 0.05%, Nb: 0.015 to 0.040%, Ti: 0.010-0.025%, less than or equal to 2ppm of [ H ], and the balance of Fe and inevitable impurities.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111748678A (en) * | 2020-07-08 | 2020-10-09 | 宝钢湛江钢铁有限公司 | Low-compression-ratio large-thickness lamellar tearing-resistant steel plate and manufacturing method thereof |
| CN111961967A (en) * | 2020-07-31 | 2020-11-20 | 天津钢铁集团有限公司 | Steel plate for small-compression-ratio thick-specification controlled rolling type Q345GJE building structure and production method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967597A (en) * | 2010-10-10 | 2011-02-09 | 舞阳钢铁有限责任公司 | Method for producing high-thickness Z-direction steel plate |
| CN102041432A (en) * | 2010-12-21 | 2011-05-04 | 南阳汉冶特钢有限公司 | Q420GJD-Z35 steel plate with thickness of less than or equal to 60 millimeters for high-rise building and production method thereof |
| CN102080184A (en) * | 2010-12-21 | 2011-06-01 | 南阳汉冶特钢有限公司 | 75-mm Z15 series steel plate prepared by rolling 250-mm casting blank and production method of 75-mm Z15 series steel plate |
| CN102330017A (en) * | 2011-09-29 | 2012-01-25 | 莱芜钢铁集团有限公司 | Production method of superthick steel plate by using continuous casting billet in condition of small compression ratio |
| CN102851591A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | High-strength high-toughness low temperature steel for ship and manufacture method thereof |
| CN104451379A (en) * | 2014-11-06 | 2015-03-25 | 南京钢铁股份有限公司 | High-strength low-alloy niobium-vanadium structural steel and preparation method thereof |
| CN104451375A (en) * | 2014-11-18 | 2015-03-25 | 南京钢铁股份有限公司 | Q235C super-thick steel plate having thickness of 160mm and low compression ratio and preparation method of steel plate |
| CN105908086A (en) * | 2016-06-30 | 2016-08-31 | 江阴兴澄特种钢铁有限公司 | Extremely-thick low-alloy steel plate with low compression ratio and preparation method thereof |
| CN108070789A (en) * | 2018-01-17 | 2018-05-25 | 山东钢铁集团日照有限公司 | The special thick steel of not less than 480MPa grades Ultra-fine Graineds of yield strength and preparation method |
| CN109252108A (en) * | 2018-09-28 | 2019-01-22 | 唐山中厚板材有限公司 | A kind of 150mm thickness low compression ratio Z-direction performance steel plate and its production method |
| CN109576466A (en) * | 2018-11-09 | 2019-04-05 | 江阴兴澄特种钢铁有限公司 | A kind of special thick low temperature structure steel plate of low compression ratio and its manufacturing method |
-
2019
- 2019-10-17 CN CN201910986955.1A patent/CN110629002A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967597A (en) * | 2010-10-10 | 2011-02-09 | 舞阳钢铁有限责任公司 | Method for producing high-thickness Z-direction steel plate |
| CN102041432A (en) * | 2010-12-21 | 2011-05-04 | 南阳汉冶特钢有限公司 | Q420GJD-Z35 steel plate with thickness of less than or equal to 60 millimeters for high-rise building and production method thereof |
| CN102080184A (en) * | 2010-12-21 | 2011-06-01 | 南阳汉冶特钢有限公司 | 75-mm Z15 series steel plate prepared by rolling 250-mm casting blank and production method of 75-mm Z15 series steel plate |
| CN102851591A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | High-strength high-toughness low temperature steel for ship and manufacture method thereof |
| CN102330017A (en) * | 2011-09-29 | 2012-01-25 | 莱芜钢铁集团有限公司 | Production method of superthick steel plate by using continuous casting billet in condition of small compression ratio |
| CN104451379A (en) * | 2014-11-06 | 2015-03-25 | 南京钢铁股份有限公司 | High-strength low-alloy niobium-vanadium structural steel and preparation method thereof |
| CN104451375A (en) * | 2014-11-18 | 2015-03-25 | 南京钢铁股份有限公司 | Q235C super-thick steel plate having thickness of 160mm and low compression ratio and preparation method of steel plate |
| CN105908086A (en) * | 2016-06-30 | 2016-08-31 | 江阴兴澄特种钢铁有限公司 | Extremely-thick low-alloy steel plate with low compression ratio and preparation method thereof |
| CN108070789A (en) * | 2018-01-17 | 2018-05-25 | 山东钢铁集团日照有限公司 | The special thick steel of not less than 480MPa grades Ultra-fine Graineds of yield strength and preparation method |
| CN109252108A (en) * | 2018-09-28 | 2019-01-22 | 唐山中厚板材有限公司 | A kind of 150mm thickness low compression ratio Z-direction performance steel plate and its production method |
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| CN111961967B (en) * | 2020-07-31 | 2021-09-21 | 天津钢铁集团有限公司 | Steel plate for small-compression-ratio thick-specification controlled rolling type Q345GJE building structure and production method thereof |
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Application publication date: 20191231 |