CN110076196B - Production method of crack arrest steel for container ship - Google Patents
Production method of crack arrest steel for container ship Download PDFInfo
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- CN110076196B CN110076196B CN201910405113.2A CN201910405113A CN110076196B CN 110076196 B CN110076196 B CN 110076196B CN 201910405113 A CN201910405113 A CN 201910405113A CN 110076196 B CN110076196 B CN 110076196B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 62
- 239000010959 steel Substances 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000005096 rolling process Methods 0.000 claims abstract description 124
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 83
- 230000035515 penetration Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 12
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 9
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 3
- 230000033764 rhythmic process Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 6
- 238000002791 soaking Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/026—Rolling
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a production method of crack arrest steel for container ships, which reduces rolling passes and increases pass rolling reduction by selecting blanks with different sections for rolling according to different finished product widths; according to the characteristics of special rolling mode and slow rolling rhythm, the planning arrangement utilizes a heating furnace to leave vacant sites to reduce the furnace time, ensure the execution of the heating process and ensure the surface quality; the uniformity of the plate blank in the thickness direction is ensured in the heating process; the rolling process adopts a full longitudinal rolling or full transverse rolling mode as far as possible, and the effective compression ratio is increased; and carrying out ultra-fast cooling on the intermediate blank in order to refine the crystal grains, and setting different cooling processes and determining a finished steel plate cooling process according to specifications. Therefore, the stable production process for accurately and effectively producing the crack arrest steel is realized, the stability of the crack arrest steel production process meets the requirements of batch industrial production, mechanical properties, product quality stability and other indexes, and the production process is easy to control.
Description
Technical Field
The invention relates to a production method of steel, in particular to a production method of crack arrest steel for container ships.
Background
In recent years, with the demand of economic development, the trade volume is increased, the marine material transportation volume is continuously increased in order to improve the marine transportation efficiency, and the container ship develops towards the large-scale, efficient, safe and environment-friendly direction, thereby putting more and higher requirements on the structural design and materials of the ship body. As the parts such as the ship opening coaming, the deck and the like of the large container ship bear complex alternating stress such as heavy load, impact and the like, in order to ensure the safety of the ship structure and prevent brittle fracture, container crack arrest steel with high strength, large thickness and high toughness is required to be adopted to meet the use requirement.
For the crack arrest steel production process of 70-80mm thickness, because of the process particularity, multi-stage low temperature rolling is required, and the intermediate billet needs to pass water many times, the appearance temperature presented in the steel plate rolling process is low, the core temperature is high, the condition that the performance is not right caused by waste in rolling warping and rolling process temperature fluctuation is easy to appear in a wide and thick plate rolling mill, and the one-time yield is very low.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides a production method of crack arrest steel for container ships, so that the stability of the production process of the crack arrest steel meets the requirements of various indexes such as batch industrial production, mechanical property, product quality stability and the like.
The technical scheme is as follows: the invention relates to a production method of crack arrest steel for container ships, which is characterized by comprising the following steps:
(1) when the blank material type is designed, the thickness of the section of the blank is selected to be 320mm, the width section of the blank is selected to be 2070-;
(2) heating the blank: the heating temperature is 1140-; the furnace time of each slab in the heating furnace is controlled to be 320-370 min;
(3) the rolling adopts a full longitudinal rolling or full transverse rolling mode, for the broadening rule, the rolling width is more than 3500mm after steel rotation, and the single-pass reduction is not more than 30 mm; two-stage rolling is adopted, and the thickness of the intermediate blank rolled in the two stages is controlled according to the thickness of a product;
(4) cooling the intermediate blank: cooling with ultra-fast cooling equipment, passing the intermediate blank through water twice, with water ratio of 0.95-1.1, speed of 1.0m/s, acceleration of 0, water temperature controlled at 18-22 deg.C, selecting collecting pipe and flow rate according to thickness and width, setting range using 6-14 groups of high-density nozzle collecting pipes, single group of collecting pipe flow rate controlled at 350-430m3After the first water penetration is finished, manually swinging the roller way for 90 seconds, and forcing boiled water to finish the second water penetration at 60 seconds;
(5) temperature control rolling: the time of returning red is 5.5-8min after the second water penetration is finished, the temperature of returning red is 785-;
(6) cooling by adopting ultra-fast cooling equipment, and setting parameters: water flow 350m for 1-4 groups of slit nozzle collecting pipes3H, water ratio 1.6; 5-14 groups of high-density nozzle header water flow 500m3The water ratio is 1.2, the water temperature is 18-22 ℃, the roller speed is 0.25-0.33m/s, and the temperature of red return is 390-430 ℃.
Has the advantages that: according to the production method, the blanks with different sections are selected for rolling according to different finished product widths, so that the rolling passes are reduced, and the pass rolling reduction is increased; according to the characteristics of special rolling mode and slow rolling rhythm, the planning arrangement utilizes a heating furnace to leave vacant sites to reduce the furnace time, ensure the execution of the heating process and ensure the surface quality; the uniformity of the plate blank in the thickness direction is ensured in the heating process; the rolling process adopts a full longitudinal rolling or full transverse rolling mode as far as possible, and the effective compression ratio is increased; and carrying out ultra-fast cooling on the intermediate blank in order to refine the crystal grains, and setting different cooling processes and determining a finished steel plate cooling process according to specifications. Therefore, the stable production process for accurately and effectively producing the crack arrest steel is realized, the stability of the crack arrest steel production process meets the requirements of batch industrial production, mechanical properties, product quality stability and other indexes, and the production process is easy to control.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The production method of the invention is adopted to produce 230 crack arrest steel plates for container ships in total, and comprises the following steps:
(1) the material type design principle reduces rolling passes and increases pass rolling reduction; the thickness of the section of the blank is selected to be 320mm, the section of the width of the blank is selected to be 2070-2770mm, the rolling target width is divided into three sections according to the width requirements of different rolled finished products, wherein the three sections are 2600mm, 3200mm and 3200-3600mm respectively, longitudinal and transverse rolling is selected in the sections, the minimum pass rolling is realized in the way of the rolling width of the length of the blank, and if the rule cannot meet the requirement of selecting the longitudinal and transverse rolling in the sections, the longitudinal and transverse longitudinal rolling mode is selected.
(2) Heating the blank: the heating temperature is 1140-1160 ℃, in order to ensure the uniformity of the steel plate in the thickness direction, the furnace time and the soaking time of the blank are properly controlled, specifically, the ratio of the furnace time to the thickness of the blank is controlled to be more than 1.0min/mm, and the ratio of the soaking time to the thickness of the blank is controlled to be more than or equal to 0.15 min/mm; in addition, 6-8 ironing roller materials are arranged before the crack arrest steel is rolled; because the rolling mode of the steel is special, the rolling rhythm is slow, 20 pieces of steel are loaded in each furnace in the heating furnace for preventing the furnace time from being overlong and ensuring the heating temperature uniformity of each stage, the vacancy of each row of steel is 3.5-3.75m, the furnace time of each plate blank is controlled at 320-370min, and the surface problems of pitted surface and the like are prevented.
(3) The rolling process comprises the following steps: in order to increase the effective compression ratio, a full longitudinal rolling or full transverse rolling mode is adopted, for the widening rule, the rolling width after steel rotation is more than 3500mm, the single-pass reduction is not more than 30mm, and rolling nose is prevented; two-stage rolling is adopted, and the thickness of the intermediate blank rolled in the two stages is controlled according to the thickness of the product, specifically, when the thickness of the product is 70-75mm, the thickness of the intermediate blank is 153-160 mm; when the thickness of the product is 80mm, the thickness of the intermediate blank is 163-170 mm; the second-stage initial rolling temperature is less than or equal to 770 ℃.
(4) Cooling the intermediate blank: because the crack arrest steel needs to ensure strict impact performance and crack arrest performance, needs differential temperature rolling, increases the penetration of the rolling force of the steel plate core in the rolling process to achieve the purpose of refining grains, needs cooling of an intermediate billet to form the temperature difference between the surface and the core, adopts ultra-fast cooling equipment for cooling, leads the intermediate billet to pass through water twice, has the water ratio of 0.95-1.1, the speed of 1.0m/s, the acceleration of 0, controls the water temperature to be 18-22 ℃, selects a collecting pipe and the flow rate according to the thickness and the width, uses 6-14 groups of high-density nozzle collecting pipes within a set range, controls the flow rate of a single group of collecting pipes to be 350-430m3H is used as the reference value. Specifically, the rolling target width is 2600mm from 2000-3H; the rolling target width is 2600-3H; the rolling target width is 3200-3600mm, and the water quantity of 8-14 groups of collecting pipes is selected to be 350-370m3H is used as the reference value. The selection of headers and flows in this example are shown in the following table:
after the first water penetration is finished, the roller way swings for 90 seconds manually, and the boiled water is forced to finish the second water penetration at 60 seconds.
(5) Temperature control rolling: the time of returning red is 5.5-8min after the second water penetration is finished, the temperature of returning red is 785-; when the schedule is arranged, the front rolling of a two-stage machine is selected, so that abnormal rolling caused by uneven cooling of the tail part is prevented.
(6) And (3) cooling: cooling by adopting ultra-fast cooling (DQ + ACC) equipment, and setting parameters: water flow 350m for 1-4 groups of slit nozzle collecting pipes3H, water ratio 1.6; 5-14 groups of high-density nozzle header water flow 500m3The water ratio is 1.2, the water temperature is 18-22 ℃, the roller speed is 0.25-0.33m/s, the cooling roller speed of 80mm steel plate is 0.25m/s, the cooling roller speed of 70mm steel plate is 0.33m/s and the temperature of red return is 390-.
Typical examples in this production are provided below.
Example 1 for producing order crack arrest steel with thickness of 70mm and width of 2060mm, a detailed production scheme needs to be established before production, preparation work for production is well done, and production is optimized according to the following steps after production conditions are confirmed:
1. material type design: the section of the thickest continuous casting billet is 320mm, the full longitudinal rolling mode blank design is selected according to the principle of reducing rolling passes, the target width of the product is 2130mm, the size of the blank is 320 x 2130 x L, and the blank design can be directly rolled transversely, so that the forming passes are reduced, and the effective pass reduction is increased.
2. Heating the blank: as the blank is rolled longitudinally, the heating temperature of the plate blank is limited to 1145-. 6 pieces of hot roller materials are arranged before rolling, in order to prevent long furnace time and ensure the uniformity of heating temperature at each stage, 20 pieces of steel are loaded in each furnace, the vacancy of each row of steel is 3.75m, the furnace time of crack-stopping steel is properly controlled, and the problem of the surface of a pitted pit of a pitted surface is effectively prevented.
3. The rolling process comprises the following steps: directly carrying out full longitudinal rolling before the steel is discharged from the heating furnace, preventing rolling from warping, setting a water passing mode of an intermediate billet, selecting a single-billet rolling mode in the rolling mode, automatically selecting temperature control, carrying out two-stage rolling, setting 4+4+1 in the regulation, namely carrying out 4 times of rough rolling, 4 times of finish rolling and 1 time of leveling, and ensuring that the secondary rolling amount at the end of the rough rolling is more than 35 mm;
4. cooling the intermediate blank: the method comprises the steps of selecting and using ultra-fast cooling equipment for cooling, passing water through an intermediate blank twice, wherein the water ratio is 0.95, the speed is 1.0m/s, the acceleration is 0, using 6-14 groups of high-density nozzle collecting pipes, and the flow rate of a single group of collecting pipes is 380m3After the first automatic water penetration is finished, manually swinging the roller way for 90 seconds, forcibly boiling water at 60 seconds, simultaneously opening air blowing and water blowing, and returning to the automatic state to finish the second water penetration;
5. temperature control rolling: the time of returning red is 7.5min after the second water penetration is finished, strictly less than 7min, the temperature of returning red is 790-800 ℃, the rolling is started before the selector, the rolling temperature in the second stage is 778 ℃, and the final rolling temperature is 760-770 ℃;
6. and (3) cooling: cooling by adopting ultra-fast cooling (DQ + ACC) equipment, and setting parameters: 1-4 slit nozzle header water flow 350m3Water flow rate of 500m in high-density spray nozzle header pipe with water ratio of 1.6, 5-14 groups3The water ratio is 1.2, the water temperature is 19-20 ℃, the roller speed is 0.33m/s, and the temperature of red return is 405-.
Example 2 in order to produce 2880 mm-wide order crack arrest steel with a thickness of 80mm, a detailed production scheme needs to be established before production, preparation work for production is well done, and production is optimized according to the following steps after production conditions are confirmed:
1. material type design: the cross section of the thickest continuous casting slab is 320mm, the full-transverse rolling mode blank design is selected according to the principle of reducing rolling passes, the target width of a product is designed to be 2955mm, the size of the blank is 320 x 2955 x L, and the blank design is used for directly turning steel transverse rolling in the rolling process, reducing forming passes and increasing the effective pass reduction.
2. Heating the blank: the blank is rolled completely and transversely, the upper limit of the heating temperature of the plate blank is 1150-plus-1160 ℃, in order to ensure the uniformity of the thickness direction of the steel plate, the in-furnace time of the heating furnace is controlled to be 320-plus-350 min, and the soaking time is 60-75 min; 7 pieces of hot roll materials are arranged before rolling, in order to prevent long furnace time and ensure the heating temperature uniformity of each stage, 20 pieces of steel are loaded in each furnace, the vacancy of each row of steel is 3.6m, the furnace time of the crack-stopping steel is properly controlled, and the problem of the surface of a pitted pit of a pitted surface is effectively prevented.
3. The rolling process comprises the following steps: directly rotating steel for transverse rolling before the machine after the steel is tapped by the heating furnace, preventing rolling from warping, setting a water passing mode of an intermediate billet, selecting a single-billet rolling mode for the rolling mode, automatically selecting temperature control, and carrying out two-stage rolling, wherein the regulation is set to be 6+6+1, namely 6 passes of rough rolling, 6 passes of finish rolling and 1 pass of leveling, and the rolling reduction of the two passes at the end of the rough rolling is more than 35 mm;
4. cooling the intermediate blank: the method comprises the steps of selecting ultra-fast cooling equipment for cooling, passing water through an intermediate blank twice, enabling the water ratio to be 1.0, the speed to be 1.0m/s and the acceleration to be 0, using 7-14 groups of high-density nozzle collecting pipes, and enabling the flow rate of a single group of collecting pipes to be 390m3After the first automatic water penetration is finished, manually swinging the roller way for 90 seconds, forcibly boiling water at 60 seconds, simultaneously opening air blowing and water blowing, and returning to the automatic state to finish the second water penetration;
5. temperature control rolling: the time of returning red is 8min after the second water penetration is finished, strictly less than 7.5min, the temperature of returning red is up to 792-plus-798 ℃, the rolling is started before the selector, the temperature of the rolling at the second stage is 773 ℃, and the temperature of the final rolling is 760-plus-770 ℃.
6. And (3) cooling: cooling by adopting ultra-fast cooling (DQ + ACC) equipment, and setting parameters: 1-4 slit nozzle header water flow 350m3Water flow rate of 500m in high-density spray nozzle header pipe with water ratio of 1.6, 5-14 groups3The water ratio is 1.2, the water temperature is 19-20 ℃, the roller speed is 0.25m/s, and the temperature of red return is 405-.
Example 3 to produce order crack arrest steel with thickness of 75mm and width of 3250mm, a detailed production scheme needs to be established before production, preparation work for production is well done, and production is optimized according to the following steps after production conditions are confirmed:
1. material type design: the section of the thickest continuous casting billet is 320mm, the full transverse rolling mode blank design is selected according to the principle of reducing rolling passes, the target width of the product is 3475mm, the size of the blank is 320X 3475X L, and the blank design only can select the longitudinal, transverse and longitudinal rolling modes.
2. Heating the blank: the blank is rolled completely and transversely, the lower limit of the heating temperature of the plate blank is 1140-1150 ℃, in order to ensure the uniformity of the thickness direction of the steel plate, the in-furnace time of the heating furnace is controlled to be 320-370min, and the soaking time is 65-80 min; 8 blocks of hot roller materials are arranged before rolling, in order to prevent long furnace time and ensure the uniformity of heating temperature at each stage, 20 blocks of steel are loaded in each furnace, the vacancy of each row of steel is 3.5m, the furnace time of the crack-stopping steel is properly controlled, and the problem of the surface of a pitted pit of a pitted surface is effectively prevented.
3. The rolling process comprises the following steps: directly rotating steel for transverse rolling before the machine after the steel is tapped by the heating furnace, preventing rolling from warping, setting a water passing mode of an intermediate billet, selecting a single-billet rolling mode for the rolling mode, automatically selecting temperature control, and carrying out two-stage rolling, wherein the regulation is set to be 4+6+1, namely 4 passes of rough rolling, 6 passes of finish rolling and 1 pass of leveling, and the secondary rolling amount at the end of the rough rolling is more than 35 mm;
4. cooling the intermediate blank: the method comprises the steps of selecting and using ultra-fast cooling equipment for cooling, passing water through an intermediate blank twice, wherein the water ratio is 1.1, the speed is 1.0m/s, the acceleration is 0, 8-14 groups of high-density nozzle collecting pipes are used, and the flow of a single group of collecting pipes is 350m3After the first automatic water penetration is finished, manually swinging the roller way for 90 seconds, forcibly boiling water at 60 seconds, simultaneously opening air blowing and water blowing, and returning to the automatic state to finish the second water penetration;
5. temperature control rolling: and the red returning time is 8min after the second water penetration is finished, the red returning temperature is up to 792-.
6. And (3) cooling: cooling by adopting ultra-fast cooling (DQ + ACC) equipment, and setting parameters: 1-4 slit nozzle header water flow 350m3Water flow rate of 500m in high-density spray nozzle header pipe with water ratio of 1.6, 5-14 groups3The water ratio is 1.2, the water temperature is 18-22 ℃, the roller speed is 0.30m/s, and the temperature of red return is 408 ℃ and 415 ℃.
The above examples are specific implementation manners for respectively producing 70mm, 75mm and 80mm crack arrest steels by adopting the method of the invention, 230 steel plates are produced in total, the performance meets the standard requirement, the one-time rolling yield is 98.7%, and the performance qualified rate is 94.7%.
Claims (9)
1. The production method of the crack arrest steel for the container ship is characterized by comprising the following steps:
(1) when the blank material type is designed, the thickness of the section of the blank is selected to be 320mm, the width section of the blank is selected to be 2070-;
(2) heating the blank: the heating temperature is 1140-; the furnace time of each slab in the heating furnace is controlled to be 320-370 min;
(3) the rolling adopts a full longitudinal rolling or full transverse rolling mode, for the broadening rule, the rolling width is more than 3500mm after steel rotation, and the single-pass reduction is not more than 30 mm; two-stage rolling is adopted, and the thickness of the intermediate blank rolled in the two stages is controlled according to the thickness of a product;
(4) cooling the intermediate blank: cooling with ultra-fast cooling equipment, passing the intermediate blank through water twice, with water ratio of 0.95-1.1, speed of 1.0m/s, acceleration of 0, water temperature controlled at 18-22 deg.C, selecting collecting pipe and flow rate according to thickness and width, setting range using 6-14 groups of high-density nozzle collecting pipes, single group of collecting pipe flow rate controlled at 350-430m3After the first water penetration is finished, manually swinging the roller way for 90 seconds, and forcing boiled water to finish the second water penetration at 60 seconds;
(5) temperature control rolling: the time of returning red is 5.5-8min after the second water penetration is finished, the temperature of returning red is 785-;
(6) cooling by adopting ultra-fast cooling equipment, and setting parameters: water flow 350m for 1-4 groups of slit nozzle collecting pipes3H, water ratio 1.6; 5-14 groups of high-density nozzle header water flow 500m3The water ratio is 1.2, the water temperature is 18-22 ℃, the roller speed is 0.25-0.33m/s, and the temperature of red return is 390-430 ℃.
2. The method for producing the crack arrest steel for container ships according to claim 1, characterized in that in step (1), if the regulations cannot meet the requirement of selecting the longitudinal and transverse rolling within the interval, the longitudinal and transverse longitudinal rolling mode is selected.
3. The method for producing the crack arrest steel for container ships according to claim 1, characterized in that, in the step (2), the heating furnace is filled with 20 slabs per furnace, and each row of steel leaves a vacant space of 3.5-3.75 m.
4. The method for producing the crack arrest steel for container ships as claimed in claim 1, wherein, in the step (3), when the thickness of the product is 70-75mm, the thickness of the intermediate billet is 153-160 mm; when the thickness of the product is 80mm, the thickness of the intermediate blank is 163-170 mm.
5. The method for producing the crack arrest steel for container ships as claimed in claim 1, wherein in the step (4), the rolling target width is 2600mm, and the water amount of the 6-14 groups of headers is 380 mm3H; the rolling target width is 2600-3H; the rolling target width is 3200-3600mm, and the water quantity of 8-14 groups of collecting pipes is selected to be 350-370m3/h。
6. The method for producing the crack arrest steel for container ships according to claim 5, characterized in that, in step (4), for a product with a thickness of 80 mm: when the rolling target width is 2000-2600mm, the water ratio is 0.95, 6-14 groups of high-density nozzle headers are used, and the flow rate of a single group of headers is controlled to be 430m3H; when the rolling target width is 2600-3H; when the rolling target width is 3200-3600mm, the water ratio is 1.1, 8-14 groups of high-density nozzle collecting pipes are used, and the flow rate of the single group of collecting pipes is controlled to be 370m3/h。
7. The method for producing crack arrest steel for container ships according to claim 5, characterized in that, in step (4), for products with a thickness of 70 or 75 mm: when the rolling target width is 2000-2600mm, the water ratio0.95, 6-14 groups of high-density nozzle headers are used, and the flow rate of the single group of headers is controlled to be 380m3H; when the rolling target width is 2600-3H; when the rolling target width is 3200-3600mm, the water ratio is 1.1, 8-14 groups of high-density nozzle collecting pipes are used, and the flow rate of the single group of collecting pipes is controlled to be 350m3/h。
8. The method for producing the crack arrest steel for container ships according to claim 1, characterized in that in step (5), the temperature controlled rolling is performed by selecting two-stage pre-rolling during schedule arrangement.
9. The method for producing crack stop steel for container ships as defined in claim 1, wherein in the step (6), the roll speed is set in accordance with the thickness of the sheet, and the roll speed for cooling the sheet of 80mm is 0.25m/s and the roll speed for cooling the sheet of 70mm is 0.33 m/s.
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| CN201910405113.2A CN110076196B (en) | 2019-05-15 | 2019-05-15 | Production method of crack arrest steel for container ship |
| KR1020217037938A KR102356461B1 (en) | 2019-05-15 | 2019-12-04 | Production method of crack-stopping steel for container ships |
| PCT/CN2019/122907 WO2020228303A1 (en) | 2019-05-15 | 2019-12-04 | Method for producing crack arrest steel for container ship |
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| CN110076196B (en) * | 2019-05-15 | 2020-05-22 | 南京钢铁股份有限公司 | Production method of crack arrest steel for container ship |
| CN110756580B (en) * | 2019-10-15 | 2021-03-30 | 南京钢铁股份有限公司 | Rolling method of wide and thin 6Mo super austenitic stainless steel plate |
| CN113263050A (en) * | 2021-04-14 | 2021-08-17 | 首钢集团有限公司 | Method for producing high-surface-quality strip steel |
| CN113102500B (en) * | 2021-04-27 | 2022-04-19 | 南京钢铁股份有限公司 | Rolling method of impact Q345R at-40 DEG C |
| CN114289529B (en) * | 2021-12-14 | 2023-06-20 | 张家港宏昌钢板有限公司 | Header opening method under controlled cooling after rolling |
| CN114713627A (en) * | 2022-02-21 | 2022-07-08 | 南京钢铁股份有限公司 | Rolling method for improving thick plate structure uniformity by using intermediate blank water penetrating device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368251A (en) * | 2008-09-28 | 2009-02-18 | 舞阳钢铁有限责任公司 | Steel plate for large-thickness hydrogen-contacting equipment and its production technology |
| CN103572023A (en) * | 2013-10-24 | 2014-02-12 | 南京钢铁股份有限公司 | Method for producing ultra-fine grains on surface layer of thick/ultra-thick low-alloy steel plate |
| CN104404214A (en) * | 2014-11-06 | 2015-03-11 | 新余钢铁集团有限公司 | Making method of high strength and toughness lamellar tearing-resistant steel plate with thickness of 50-80mm |
| CN106311776A (en) * | 2016-08-22 | 2017-01-11 | 南京钢铁股份有限公司 | Intermediate billet inclined jet flow cooling and shape control method |
| CN108660389A (en) * | 2017-03-29 | 2018-10-16 | 鞍钢股份有限公司 | High-strength thick steel plate with excellent crack resistance and manufacturing method thereof |
| CN109338213A (en) * | 2018-09-29 | 2019-02-15 | 南京钢铁股份有限公司 | The strain resistant pipe line steel in the deep-sea X80M and rolling mill practice |
| CN109576585A (en) * | 2018-12-25 | 2019-04-05 | 江阴兴澄特种钢铁有限公司 | A kind of van container EH47 crack arrest steel peculiar to vessel and its manufacturing method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005097694A (en) * | 2003-09-26 | 2005-04-14 | Jfe Steel Kk | Method for manufacturing non-heat-treated high-strength thick steel plate superior in brittle crack arrestability |
| JP5396758B2 (en) * | 2007-07-27 | 2014-01-22 | Ｊｆｅスチール株式会社 | Hot-rolled section steel for ship ballast tank and manufacturing method thereof |
| JP5337412B2 (en) * | 2008-06-19 | 2013-11-06 | 株式会社神戸製鋼所 | Thick steel plate excellent in brittle crack propagation stopping characteristics and method for producing the same |
| WO2014155440A1 (en) * | 2013-03-26 | 2014-10-02 | Ｊｆｅスチール株式会社 | High strength thick steel plate for high heat input welding with excellent brittle crack arrestability and manufacturing method therefor |
| CN105200215B (en) * | 2015-10-09 | 2017-12-29 | 天津钢铁集团有限公司 | A kind of 50 100mm microalloy Heavy plate production methods |
| CN111361235B (en) * | 2018-12-26 | 2022-06-28 | 宝山钢铁股份有限公司 | High-corrosion-resistance composite steel plate for ship and manufacturing method thereof |
| CN110076196B (en) * | 2019-05-15 | 2020-05-22 | 南京钢铁股份有限公司 | Production method of crack arrest steel for container ship |
-
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368251A (en) * | 2008-09-28 | 2009-02-18 | 舞阳钢铁有限责任公司 | Steel plate for large-thickness hydrogen-contacting equipment and its production technology |
| CN103572023A (en) * | 2013-10-24 | 2014-02-12 | 南京钢铁股份有限公司 | Method for producing ultra-fine grains on surface layer of thick/ultra-thick low-alloy steel plate |
| CN104404214A (en) * | 2014-11-06 | 2015-03-11 | 新余钢铁集团有限公司 | Making method of high strength and toughness lamellar tearing-resistant steel plate with thickness of 50-80mm |
| CN106311776A (en) * | 2016-08-22 | 2017-01-11 | 南京钢铁股份有限公司 | Intermediate billet inclined jet flow cooling and shape control method |
| CN108660389A (en) * | 2017-03-29 | 2018-10-16 | 鞍钢股份有限公司 | High-strength thick steel plate with excellent crack resistance and manufacturing method thereof |
| CN109338213A (en) * | 2018-09-29 | 2019-02-15 | 南京钢铁股份有限公司 | The strain resistant pipe line steel in the deep-sea X80M and rolling mill practice |
| CN109576585A (en) * | 2018-12-25 | 2019-04-05 | 江阴兴澄特种钢铁有限公司 | A kind of van container EH47 crack arrest steel peculiar to vessel and its manufacturing method |
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| CN110076196A (en) | 2019-08-02 |
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