CN107794355A - Production method of 250mm super-thick high-strength steel for ocean platform - Google Patents
Production method of 250mm super-thick high-strength steel for ocean platform Download PDFInfo
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- CN107794355A CN107794355A CN201610792341.6A CN201610792341A CN107794355A CN 107794355 A CN107794355 A CN 107794355A CN 201610792341 A CN201610792341 A CN 201610792341A CN 107794355 A CN107794355 A CN 107794355A
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- ocean platform
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000005242 forging Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000009933 burial Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials 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 250mm super-thick high-strength steel for an ocean platform, which specifically comprises the following steps: 1. a multi-angle ingot forging stock is used as a blank, and the size of the blank is 350 x 2500 x 5000 mm. 2. The weight percentage of the chemical components is as follows: 0.10-0.15% of C, Si: 0.35-0.45%, Mn: 1.38-1.45%, Nb 0.30-0.35%, P is less than or equal to 0.01%, S is less than or equal to 0.003%, Ti: 0.002-0.005%, Cr: 0.03-0.06%. The produced 250mm extra-thick high-strength steel EH36-Z35 for the ocean platform has all performance indexes meeting ideal requirements.
Description
Technical field
Background technology
Extra large work steel is the critical material during marine structure is built, and in exploitation Marine oil and gas resource, builds ocean platform
During, in order to improve platform security, big thickness, the application of super-high strength steel are more and more common, and intensity more and more higher, at present
The country also needs a large amount of imports, is the steel that inland sea industrial and commercial bank of state industry is badly in need of.
The production technology of extra large work steel is strict, requires high to stabilization of equipment performance, development difficulty is big, it is desirable to low-temperature impact toughness
The excellent properties such as high, the anti-good, seawater corrosion resistance of lamellar tearing, domestic only Wugang, Baosteel have supply of material achievement at present.
The content of the invention
It is an object of the invention to provide a kind of production method of the special thick High-strength ocean platform steel of 250mm.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of production method of the special thick High-strength ocean platform steel of 250mm, specifically includes herein below：
1st, polygonal ingot forging stock is used as blank, billet size 350*2500*5000mm.
2nd, chemical component weight percentage is：C:0.10-0.15%, Si：0.35-0.45%, Mn：1.38-1.45%,
Nb:0.30-0.35%, P≤0.01%, S≤0.003%, Ti：0.002-0.005%, Cr：0.03-0.06%.
3rd, technological process is：The heating of Heating Steel Ingots-de-scaling-TMCP rolling-alignings-burial pit and slow cooling-normalizing-flaw detection-
Gas flame cuttiug-inspection, inspection-storage.
4th, the total time inside furnace of polygonal ingot forging stock 7 hours, 700 DEG C of shove charges are incubated 2 hours, and 700-1100 DEG C heats up 3 hours,
1100 DEG C of soaking about 3 hours.
5th, rolling mill practice：Carry out it is general roll, transverse rolling to 3000mm, then carry out 1-2 passage axial rollings, to finished product thickness.
6th, cold technique is controlled：Using reciprocating weak cold pattern, the cold insulation time of cooling is more than 15min, is specifically set as out cold
780-820 DEG C of temperature, final cooling temperature are 480-580 DEG C, and the average cooling rate of 1/4 position of temperature control section control panel thickness is 0.3-1.0
℃/s。
7th, retarded cooling process：Roll rear steel plate and directly enter burial pit, be warming up to 500 DEG C, and 48 hours are incubated with 500 DEG C, hereafter
Come out of the stove after cooling to room temperature with the furnace.
8th, normalizing process：925 DEG C of shove charges, the rate of heat addition：1.5min/mm, soaking time：150min, air cooling of coming out of the stove.
Compared with prior art, the beneficial effects of the invention are as follows：
By above technical scheme, the special thick High-strength ocean platform steel EH36-Z35 of 250mm of production, property indices
Reach desirable.Its mechanical property is：Yield strength value 351MPa, tensile strength 524MPa, elongation percentage 34.6%, -40
DEG C impact average 144-286, Z-direction average 46, performance meet product requirement, and flaw detection is qualified.
Embodiment
Technical scheme is described in further detail below by specific embodiment.
A kind of production method of the special thick High-strength ocean platform steel of 250mm, specifically includes herein below：
1st, polygonal ingot forging stock is used as blank, billet size 350*2500*5000mm.
2nd, chemical component weight percentage is：C:0.10-0.15%, Si：0.35-0.45%, Mn：1.38-1.45%,
Nb:0.30-0.35%, P≤0.01%, S≤0.003%, Ti：0.002-0.005%, Cr：0.03-0.06%.
3rd, technological process is：The heating of Heating Steel Ingots-de-scaling-TMCP rolling-alignings-burial pit and slow cooling-normalizing-flaw detection-
Gas flame cuttiug-inspection, inspection-storage.
4th, the polygonal total time inside furnace of ingot forging stock about 7 hours, 700 DEG C of shove charges are incubated 2 hours, and 700-1100 DEG C heats up 3 hours,
1100 DEG C of soaking 3 hours.
5th, rolling mill practice：Carry out it is general roll, transverse rolling to 3000mm, then carry out 1-2 passage axial rollings, to finished product thickness.
6th, cold technique is controlled：Using reciprocating weak cold pattern, the cold insulation time of cooling is more than 15min, is specifically set as out cold
780-820 DEG C of temperature, final cooling temperature are 480-580 DEG C, and the average cooling rate of 1/4 position of temperature control section control panel thickness is 0.3-1.0
℃/s。
7th, retarded cooling process：Roll rear steel plate and directly enter burial pit, be warming up to 500 DEG C, and 48 hours are incubated with 500 DEG C, hereafter
Come out of the stove after cooling to room temperature with the furnace.
8th, normalizing process：925 DEG C of shove charges, the rate of heat addition：1.5min/mm, soaking time：150min, air cooling of coming out of the stove.
Claims (1)
1. the production method of the special thick High-strength ocean platform steel of a kind of 250mm, it is characterised in that specifically include herein below：
1) polygonal ingot forging stock is used as blank, billet size 350*2500*5000mm；
2) chemical component weight percentage is：C:0.10-0.15%, Si：0.35-0.45%, Mn：1.38-1.45%, Nb:
0.30-0.35%, P≤0.01%, S≤0.003%, Ti：0.002-0.005%, Cr：0.03-0.06%；
3) technological process is：Heating Steel Ingots-de-scaling-TMCP rolling-alignings-burial pit heating and slow cooling-normalizing-flaw detection-flame
Cutting-inspection, inspection-storage；
4) the total time inside furnace of polygonal ingot forging stock 7 hours, 700 DEG C of shove charges are incubated 2 hours, and 700-1100 DEG C heats up 3 hours, 1100 DEG C
Soaking 3 hours；
5) rolling mill practice：Carry out it is general roll, transverse rolling to 3000mm, then carry out 1-2 passage axial rollings, to finished product thickness；
6) cold technique is controlled：Using reciprocating weak cold pattern, the cold insulation time of cooling is more than 15min, is specifically set as out cold temperature
780-820 DEG C, final cooling temperature is 480-580 DEG C, and the average cooling rate of 1/4 position of temperature control section control panel thickness is 0.3-1.0 DEG C/s；
7) retarded cooling process：Roll rear steel plate and directly enter burial pit, be warming up to 500 DEG C, and 48 hours are incubated with 500 DEG C, hereafter with stove
Come out of the stove after being cooled to room temperature；
8) normalizing process：925 DEG C of shove charges, the rate of heat addition：1.5min/mm, soaking time：150min, air cooling of coming out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792341.6A CN107794355B (en) | 2016-08-31 | 2016-08-31 | Production method of 250mm super-thick high-strength steel for ocean platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792341.6A CN107794355B (en) | 2016-08-31 | 2016-08-31 | Production method of 250mm super-thick high-strength steel for ocean platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107794355A true CN107794355A (en) | 2018-03-13 |
| CN107794355B CN107794355B (en) | 2019-08-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610792341.6A Active CN107794355B (en) | 2016-08-31 | 2016-08-31 | Production method of 250mm super-thick high-strength steel for ocean platform |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930062A (en) * | 2018-11-09 | 2019-06-25 | 鞍钢股份有限公司 | Method for improving tensile property of extra-thick normalizing ship plate steel |
| CN111088417A (en) * | 2020-01-07 | 2020-05-01 | 钢铁研究总院 | Ceq and Pcm high heat input welding normalizing EH36 extra-thick plate and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011050A (en) * | 2010-07-15 | 2011-04-13 | 秦皇岛首秦金属材料有限公司 | Steel for 36kg-grade ocean platform and production method thereof |
| CN102747285A (en) * | 2012-07-11 | 2012-10-24 | 秦皇岛首秦金属材料有限公司 | Ultrathick steel plate for ships and ocean platforms and production method thereof |
| CN104911503A (en) * | 2015-06-12 | 2015-09-16 | 江阴兴澄特种钢铁有限公司 | Extra-thick tempering EH40 steel for ocean engineering and preparation method thereof |
| JP2016089188A (en) * | 2014-10-30 | 2016-05-23 | Ｊｆｅスチール株式会社 | Thick steel plate and method of producing the same |
| CN105839003A (en) * | 2016-05-31 | 2016-08-10 | 江阴兴澄特种钢铁有限公司 | Normalized-condition delivered 180-200mm-thick EH36 steel plate and preparation method thereof |
-
2016
- 2016-08-31 CN CN201610792341.6A patent/CN107794355B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011050A (en) * | 2010-07-15 | 2011-04-13 | 秦皇岛首秦金属材料有限公司 | Steel for 36kg-grade ocean platform and production method thereof |
| CN102747285A (en) * | 2012-07-11 | 2012-10-24 | 秦皇岛首秦金属材料有限公司 | Ultrathick steel plate for ships and ocean platforms and production method thereof |
| JP2016089188A (en) * | 2014-10-30 | 2016-05-23 | Ｊｆｅスチール株式会社 | Thick steel plate and method of producing the same |
| CN104911503A (en) * | 2015-06-12 | 2015-09-16 | 江阴兴澄特种钢铁有限公司 | Extra-thick tempering EH40 steel for ocean engineering and preparation method thereof |
| CN105839003A (en) * | 2016-05-31 | 2016-08-10 | 江阴兴澄特种钢铁有限公司 | Normalized-condition delivered 180-200mm-thick EH36 steel plate and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 曾正明: "《实用钢铁材料手册》", 30 June 2015, 机械工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930062A (en) * | 2018-11-09 | 2019-06-25 | 鞍钢股份有限公司 | Method for improving tensile property of extra-thick normalizing ship plate steel |
| CN111088417A (en) * | 2020-01-07 | 2020-05-01 | 钢铁研究总院 | Ceq and Pcm high heat input welding normalizing EH36 extra-thick plate and manufacturing method thereof |
| CN111088417B (en) * | 2020-01-07 | 2021-01-05 | 钢铁研究总院 | Ceq and Pcm high heat input welding normalizing EH36 extra-thick plate and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107794355B (en) | 2019-08-27 |
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