CN108396234A - Production method of EH460 marine container crack arrest steel plate - Google Patents
Production method of EH460 marine container crack arrest steel plate Download PDFInfo
- Publication number
- CN108396234A CN108396234A CN201710064779.7A CN201710064779A CN108396234A CN 108396234 A CN108396234 A CN 108396234A CN 201710064779 A CN201710064779 A CN 201710064779A CN 108396234 A CN108396234 A CN 108396234A
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- Prior art keywords
- temperature
- rolling
- steel plate
- controlled
- crack arrest
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- 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.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005098 hot rolling Methods 0.000 claims abstract description 5
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 13
- 238000009933 burial Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000010583 slow cooling Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention provides a production method of an EH460 marine container crack arrest steel plate, which comprises the following chemical components: 0.05 to 0.07% of C, Si: 0.25 to 0.35%, Mn: 1.15-1.25%, Nb 0.03-0.05%, P less than or equal to 0.01%, S less than or equal to 0.002%, Ni: 0.28-0.32%, Ti: 0.008-0.015%. Controlling the heating temperature, soaking temperature and heating time of the steel billet; the hot rolling adopts four-stage controlled rolling, and the rolling from two stages to four stages ensures that the single-pass reduction rate is more than 15 percent; online ACC cooling is adopted, the water inlet temperature and the red return temperature are controlled, cooling control is controlled in a semi-automatic mode, and cooling control parameters are manually set; and (3) immediately placing the rolled steel plates into a slow cooling pit, and stacking the other hot steel plates and the crack-stopping steel plates at the temperature of more than 300 ℃ alternately for more than or equal to 72 hours. The crack arrest steel plate has the yield strength value of 505-550 MPa, the tensile strength of 655-695 MPa, the elongation of 20-28.3%, the single impact value at-40 ℃ of 125-223J, and the performance qualified rate meeting the product requirement.
Description
Technical field
The invention belongs to metallurgical technology technical field, more particularly to a kind of production of EH460 seatainers crack arrest steel plate
Method
Background technology
In recent years, being continuously increased with marine Material Transportation amount has driven container ship to develop to enlarged direction.Collection
The upper deck of vanning ship has large-scale opening, and for large-scale merchant ship, ship beam cleaved facet bears longitudinal strength maximum, common to do
Method is to increase the thickness of Hatch Opening edge steel plate and upper deck steel plate, the steel plate for generally using thickness to be more than 50mm.
For steel plate, the plane strain state plastic region inside steel plate becomes smaller, under the action of yield stress,
Big stress is easy tod produce inside steel plate and makes crack propagation, to prevent brittle fracture, ensures the safety of ship, to pre- in ship
It surveys the position that brittle fracture may occur and the large-scale significant points being broken may be caused, it is desirable that using has good fracture toughness
With the steel for inhibiting brittle-cracking propagation characteristic.
Currently, the domestic method for generally using crystalline grain refinement improves the crack arrest characteristic of steel, however, with thickness
Increase, this method effect unobvious, when plate thickness reaches 80mm, it is difficult to ensure the crack arrest characteristic of steel.
Certain steel branch company proceeds by the process trial of 80mm or less thickness Es H460, trial-production early period from May, 2015
Steel is mainly burnt using medium temperature, two-stage controlled rolling controls red temperature, rolls four aspects of rear stacking slow cooling and carries out technique control
System.Inspection result shows that low temperature impact properties are discrete, and numerical value is generally relatively low, and component values cannot be satisfied ship less than lower limit requirement
With the performance of container crack arrest steel.
Invention content
The present invention provides a kind of production method of EH460 seatainers crack arrest steel plate, and purpose is intended to improve 40-80mm
The impact property of thick EH460 seatainers crack arrest steel.
For this purpose, the technical solution that the present invention is taken is：
A kind of production method of EH460 seatainers crack arrest steel plate, specially：
(1) chemical component weight percentage is：C:0.05~0.07%, Si：0.25~0.35%, Mn：1.15~
1.25%, Nb:0.03~0.05%, P≤0.01%, S≤0.002%, Ni：0.28-0.32%, Ti：0.008~0.015%,
Remaining is Fe and inevitable impurity.
(2) billet heating temperature control is at 1170 ± 20 DEG C, and soaking temperature control is at 1150 ± 20 DEG C, heating time 9
~11min/cm.
(3) hot rolling technology is the controlled rolling of four stages, and the rolling of two-stage to four stages ensures that single pass reduction ratio is more than
15%；Wherein：One 1020~1060 DEG C of stage start rolling temperature, waits for 270~280mm of strip plate thickness；Two-stage start rolling temperature 910~
950 DEG C, wait for 185~235mm of strip plate thickness；Three 850~890 DEG C of stage start rolling temperatures, wait for 85~165mm of strip plate thickness；Quadravalence
740~780 DEG C of start rolling temperature of section, 40~80mm of finished product thickness.
(4) cold technique is controlled：The type of cooling is online ACC coolings, enters 660~680 DEG C of coolant-temperature gage, 100 DEG C of red temperature with
Under, it controls cold using semiautomatic-mode control, the cold parameter of manual setting control, upper 290~310l/ of water (m2* min), lower water 580
~620l/ (m2* min), 0.4~0.6m/s of roller speed.
(5) retarded cooling process：Burial pit is immediately placed in after rolling, using other 300 DEG C or more hot steel plates and crack arrest steel
Plate replaces stacking mode, carries out burial pit heat preservation and furnace cooling, stacking time >=72 hour.
Beneficial effects of the present invention are：
Seatainer crack arrest steel steel plate after 40~80mm that the present invention produces in batches, property indices reach ideal
It is required that.Its mechanical property is：505~550MPa of yield strength value, 655~695MPa of tensile strength, elongation percentage 20~
28.3%, -40 DEG C of 125~223J of single impact value, properties percent of pass meets product requirement.
Specific implementation mode
Embodiment 1：
1, chemical component weight percentage is：C:0.06%, Si：0.30%, Mn：1.20%, Nb:0.04%, P≤
0.01%, S≤0.002%, Ni：0.30%, Ti：0.011%, remaining is Fe and inevitable impurity.
2, billet heating temperature control is at 1170 DEG C, and soaking temperature control is at 1150 DEG C, heating time 10min/cm.
3, hot rolling technology is the controlled rolling of four stages, and the rolling of two-stage to four stages ensures that single pass reduction ratio is respectively
20%, 18%, 16%.One 1040 DEG C of stage start rolling temperature, waits for strip plate thickness 270mm；930 DEG C of two-stage start rolling temperature, it is to be rolled
Base thickness 180mm；Three 870 DEG C of stage start rolling temperatures, wait for strip plate thickness 100mm；Four 760 DEG C of stage start rolling temperatures, finished product thickness
60mm。
4, cold technique is controlled：The type of cooling cools down for online ACC, enters 670 DEG C of coolant-temperature gage, 90 DEG C of red temperature controls cold use
Semiautomatic-mode controls, the cold parameter of manual setting control, upper water 300l/ (m2* min), lower water 600l/ (m2* min), roller speed
0.5m/s。
5, retarded cooling process：It is immediately placed in burial pit after rolling, is replaced with crack arrest steel plate using other 350 DEG C of hot steel plates
Stacking mode carries out burial pit heat preservation and furnace cooling, 75 hours stacking time.
Embodiment 2：
1, chemical component weight percentage is：C:0.065%, Si：0.33%, Mn：1.22%, Nb:0.042%, P≤
0.01%, S≤0.002%, Ni：0.30%, Ti：0.013%, remaining is Fe and inevitable impurity.
2, at 1185 DEG C, soaking temperature control is in 1170 DEG C, heating time for billet heating temperature control
10min/cm。
3, hot rolling technology is the controlled rolling of four stages, and the rolling of two-stage to four stages ensures that single pass reduction ratio is respectively
22%, 20%, 18%.One 1060 DEG C of stage start rolling temperature, waits for strip plate thickness 280mm；950 DEG C of two-stage start rolling temperature, it is to be rolled
Base thickness 230mm；Three 890 DEG C of stage start rolling temperatures, wait for strip plate thickness 155mm；Four 775 DEG C of stage start rolling temperatures, finished product thickness
80mm。
4, cold technique is controlled：The type of cooling cools down for online ACC, enters 685 DEG C of coolant-temperature gage, 100 DEG C of red temperature controls cold use
Semiautomatic-mode controls, the cold parameter of manual setting control, upper water 300l/ (m2* min), lower water 600l/ (m2* min), roller speed
0.5m/s。
5, retarded cooling process：It is immediately placed in burial pit after rolling, is replaced with crack arrest steel plate using other 360 DEG C of hot steel plates
Stacking mode carries out burial pit heat preservation and furnace cooling, 90 hours stacking time.
Claims (1)
1. a kind of production method of EH460 seatainers crack arrest steel plate, it is characterised in that：
(1) chemical component weight percentage is：C:0.05~0.07%, Si：0.25~0.35%, Mn：1.15~1.25%,
Nb:0.03~0.05%, P≤0.01%, S≤0.002%, Ni：0.28-0.32%, Ti：0.008~0.015%, remaining is
Fe and inevitable impurity；
(2) billet heating temperature control is at 1170 ± 20 DEG C, soaking temperature control at 1150 ± 20 DEG C, heating time is 9~
11min/cm；
(3) hot rolling technology is the controlled rolling of four stages, and the rolling of two-stage to four stages ensures that single pass reduction ratio is more than 15%；
Wherein：One 1020~1060 DEG C of stage start rolling temperature, waits for 270~280mm of strip plate thickness；Two-stage start rolling temperature 910~950
DEG C, wait for 185~235mm of strip plate thickness；Three 850~890 DEG C of stage start rolling temperatures, wait for 85~165mm of strip plate thickness；Four stages opened
Roll 740~780 DEG C of temperature, 40~80mm of finished product thickness；
(4) cold technique is controlled：The type of cooling cools down for online ACC, enters 660~680 DEG C of coolant-temperature gage, and 100 DEG C of red temperature is hereinafter, control
It is cold to be controlled using semiautomatic-mode, the cold parameter of manual setting control, upper 290~310l/ of water (m2* min), lower water 580~
620l/(m2* min), 0.4~0.6m/s of roller speed；
(5) retarded cooling process：It is immediately placed in burial pit after rolling, is handed over using other 300 DEG C or more hot steel plates and crack arrest steel plate
For the mode of stacking, burial pit heat preservation and furnace cooling, stacking time >=72 hour are carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710064779.7A CN108396234A (en) | 2017-02-05 | 2017-02-05 | Production method of EH460 marine container crack arrest steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710064779.7A CN108396234A (en) | 2017-02-05 | 2017-02-05 | Production method of EH460 marine container crack arrest steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108396234A true CN108396234A (en) | 2018-08-14 |
Family
ID=63093405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710064779.7A Pending CN108396234A (en) | 2017-02-05 | 2017-02-05 | Production method of EH460 marine container crack arrest steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108396234A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257703A (en) * | 2019-06-25 | 2019-09-20 | 鞍钢股份有限公司 | Production method of thin-gauge high-strength container steel plate |
| CN113549846A (en) * | 2021-07-13 | 2021-10-26 | 鞍钢股份有限公司 | 550 MPa-grade marine steel with excellent low-temperature performance and manufacturing method thereof |
| WO2022160529A1 (en) * | 2021-01-26 | 2022-08-04 | 南京钢铁股份有限公司 | High-toughness heat-resistant flat-bulb steel for ship and preparation method for flat-bulb steel |
-
2017
- 2017-02-05 CN CN201710064779.7A patent/CN108396234A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257703A (en) * | 2019-06-25 | 2019-09-20 | 鞍钢股份有限公司 | Production method of thin-gauge high-strength container steel plate |
| WO2022160529A1 (en) * | 2021-01-26 | 2022-08-04 | 南京钢铁股份有限公司 | High-toughness heat-resistant flat-bulb steel for ship and preparation method for flat-bulb steel |
| CN113549846A (en) * | 2021-07-13 | 2021-10-26 | 鞍钢股份有限公司 | 550 MPa-grade marine steel with excellent low-temperature performance and manufacturing method thereof |
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Application publication date: 20180814 |