CN106906423A - A kind of pressure vessel 20MnMoNi55 steel plates and its production method - Google Patents
A kind of pressure vessel 20MnMoNi55 steel plates and its production method Download PDFInfo
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
The invention discloses a kind of pressure vessel 20MnMoNi55 steel plates and its production method, the steel plate chemical composition and weight/mass percentage composition are：C：0.15~0.25%, Si：0.10~0.35%, Mn：1.15~1.50%, P≤0.012%, S≤0.012%, Cr≤0.20%, Mo：0.40~0.55%, Ni：0.45~0.85%, Cu≤0.12%, Al：0.010~0.050%, V≤0.020%, Ti≤0.030%, remaining is Fe and inevitable impurity.Production method includes steel-making, heating, steel rolling and heat treatment step.The steel plate for being produced has the characteristics of purity of steel high, interior solid and stable performance, and mechanical property fully meets standard requirement, is suitable for the pressure vessels such as manufacture petrochemical equipment.
Description
Technical field
The invention belongs to iron and steel smelting technology field, and in particular to a kind of pressure vessel 20MnMoNi55 steel plates and its life
Product method.
Background technology
Requirement of the development of petrochemical industry in recent years to refinery device is maximized increasingly, and the security to equipment is proposed more
Requirement high, the performance requirement to device fabrication steel plate is also increasingly harsher, except the requirement generally to low-temperature flexibility increasingly
Beyond height, along with the maximization of equipment, requirement to the anti-adverse environment and extreme environment of equipment also more and more higher, while right
The high-end kind that key equipment in large-scale petrochemical equipment is used still uses inlet plate.Particularly 20MnMoNi55 steel
Plate, used as the steel grade that world-famous cut deal producer-Di Lingen independent researches are designed, production difficulty is huge, to break up monopoly,
Substitution inlet plate, it is this area technical problem urgently to be resolved hurrily to develop domestic 20MnMoNi55 steel plates.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of pressure vessel 20MnMoNi55 steel plates；The present invention is also provided
A kind of production method of pressure vessel with 20MnMoNi55 steel plates.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：A kind of pressure vessel 20MnMoNi55 steel
Plate, the steel plate chemical composition and weight/mass percentage composition are as follows：C：0.15~0.25%, Si：0.10~0.35%, Mn：1.15~
1.50%, P≤0.012%, S≤0.012%, Cr≤0.20%, Mo：0.40~0.55%, Ni：0.45~0.85%, Cu≤0.12%,
Al：0.010~0.050%, V≤0.020%, Ti≤0.030%, remaining is Fe and inevitable impurity.
Steel plate thickness of the present invention is 70~95mm, the production technology being combined using normalizing+tempering heat treatment.
Design of Chemical Composition thinking of the present invention is as follows：In the present invention C content be 0.15~0.25%, C mainly and other elements
Carbide is formed, plays build up and precipitation strength, increase armor plate strength；The content of Mn is 1.15~1.50%, Mn
Mainly play solution strengthening and reduce phase transition temperature, improve the effect of armor plate strength；The content of Ni is 0.45~0.85%, main to make
With the degree of supercooling for being increase austenite, so that thinning microstructure, obtains reinforcing effect；The atmospheric corrosion resistance energy of steel can also be increased in addition
Power, improves low-temperature impact toughness and reduces Cold Brittleness Transition Temperature；The content of Mo is 0.45~0.55%, can significantly improve steel
Quenching degree, while temper resistance can be improved；Impurity element P, S equal size lower limit is not limited, under process equipment ability
Reduce as far as possible, to reach, steel is pure, the uniform purpose of mechanical property.
Present invention also offers a kind of above-mentioned pressure vessel production method of 20MnMoNi55 steel plates, the production method
Including steel-making, heating, steel rolling and heat treatment step.
Steel-making of the present invention includes converter smelting, the refining of LF stoves and continuous casting working procedure；The LF stoves refining procedure refining is adjusted
It is made into point, refines total time >=60min, white slag retention time >=30min, it is ensured that slag making is good.
Steel making working procedure of the present invention, the molten steel after refining is transferred to vacuum degassing furnace（VD stoves）Application of vacuum, vacuum≤
66Pa, retention time >=20min, 5~7min of soft blow；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
Heating process of the present invention, steel billet in bringing-up section heating-up temperature≤1260 DEG C, soaking zone temperature is 1230~
1250 DEG C, total heat time >=10min/cm.
Steel rolling process of the present invention, is rolled, first using recrystallization zone+Unhydrated cement two-phase control rolling technique
Stage rolling temperature is 1000~1100 DEG C, and this stage single pass rolling reduction is 10~20%, and it is 30~50% to add up reduction ratio.
Steel rolling process of the present invention, is rolled, second using recrystallization zone+Unhydrated cement two-phase control rolling technique
Stage rolling temperature is 860~900 DEG C, and it is 30~50%, reduction ratio >=10% of second stage single pass, passage to add up reduction ratio
>=3 times, thickness steel plate needed for being obtained.
Heat treatment step of the present invention, using normalizing+tempering heat treatment, normalizing temperature is 910~930 DEG C, total heating
2~3min/mm of time, cooling is accelerated after normalizing using water-cooled.
Heat treatment step of the present invention, using normalizing+tempering heat treatment, is tempered to the steel plate after normalized treatment,
Temperature is 630~650 DEG C, total 3~3.5min/mm of heat time；Air cooling is used after tempering, 20MnMoNi55 steel is obtained
Plate.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, the matching of steel plate obdurability is good, yield strength Rel
>=430MPa, tensile strength Rm：570~710MPa, 0 DEG C of 1/2 position of thickness of slab transverse direction Charpy-V impact power >=47J, elevated temperature tensile is strong
Degree index is good.2nd, the steel plate for being produced has the characteristics of purity of steel high, interior solid and stable performance, the metallurgical water of steel
Flat higher, mechanical property fully meets standard requirement, is suitable for the pressure vessels such as manufacture petrochemical equipment.3rd, steel plate inspection meets
JB/T4730.3-2015, qualified rank is I grade.
Specific embodiment
With reference to specific embodiment, the present invention will be described in detail.
Embodiment 1
Pressure vessel with 20MnMoNi55 steel plates is formed by following components in percentage by weight melting：C：0.21%, Si：
0.25%, Mn：1.40%, P：0.007%, S：0.005%, Cr：0.15%, Mo：0.51%, Ni：0.75%, Al：0.023%, Cu：
0.07%, V：0.003%, Ti：0.001%, remaining is Fe and inevitable impurity.The steel plate thickness of the present embodiment is 70mm.
The production method of the present embodiment 20MnMoNi55 steel plates, step is as follows：
（1）Steel making working procedure：Using converter smelting, the refining of LF stoves, continuous casting.Refining adjusting component, refines total time 65min, white slag
Retention time 35min, it is ensured that slag making is good, and the molten steel after refining is transferred to vacuum degassing furnace（VD stoves）Application of vacuum, vacuum
66Pa, retention time 30min, soft blow 5min；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
（2）Heating process：Steel billet is in 1255 DEG C of bringing-up section heating-up temperature, 1240 DEG C of soaking zone temperature, total heat time
11min/cm。
（3）Steel rolling process：Rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, the first stage rolls
Temperature processed is 1050 DEG C, and this stage single pass rolling reduction is 13%, and it is 35% to add up reduction ratio；Second stage rolling temperature is 880
DEG C, it is 35% to add up reduction ratio, and the reduction ratio of second-order stage single pass is 12%, and passage is 4 times, thickness steel plate needed for being obtained.
（4）Heat treatment step：Using normalizing+tempering heat treatment, 915 DEG C of normalizing temperature, total heat time 2min/mm, just
Cooling is accelerated using water-cooled after fire；Steel plate after normalized treatment is tempered, 645 DEG C of temperature, total heat time 3min/
mm.20MnMoNi55 steel plates are obtained using air cooling after tempering.
The mechanical property of the present embodiment steel plate：Yield strength 525MPa, tensile strength：625MPa, 0 at steel plate thickness 1/2
DEG C average 205J of ballistic work.Three kinds of high temperature tension test good mechanical performances of different temperatures, 100 DEG C of high temperature tension test surrenders
Intensity 515MPa, tensile strength 612MPa；200 DEG C of high temperature tension tests yield strength 504MPa, tensile strength 603MPa；300
DEG C high temperature tension test yield strength 488MPa, tensile strength 611MPa.
Embodiment 2
Pressure vessel with 20MnMoNi55 steel plates is formed by following components in percentage by weight melting：C：0.22%, Si：
0.26%, Mn：1.42%, P：0.007%, S：0.004%, Cr：0.16%, Mo：0.49%, Ni：0.73%, Al：0.024%, Cu：
0.06%, V：0.003%, Ti：0.001%, remaining is Fe and inevitable impurity.The steel plate thickness of the present embodiment is 76mm.
The production method of the present embodiment 20MnMoNi55 steel plates, step is as follows：
（1）Steel making working procedure：Using converter smelting, the refining of LF stoves, continuous casting.Refining adjusting component, refines total time 67min, white slag
Retention time 33min, it is ensured that slag making is good, and the molten steel after refining is transferred to vacuum degassing furnace（VD stoves）Application of vacuum, vacuum
62Pa, retention time 26min, soft blow 5.5min；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
（2）Heating process：Steel billet is in 1250 DEG C of bringing-up section heating-up temperature, 1245 DEG C of soaking zone temperature, total heat time
11min/cm。
（3）Steel rolling process：Rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, the first stage rolls
Temperature processed is 1040 DEG C, and this stage single pass rolling reduction is 15%, and it is 37% to add up reduction ratio；Second stage rolling temperature is 890
DEG C, it is 38% to add up reduction ratio, and the reduction ratio of second stage single pass is 14%, and passage is 5 times, thickness steel plate needed for being obtained.
（4）Heat treatment step：Using normalizing+tempering heat treatment, 920 DEG C of normalizing temperature, total heat time 2.5min/mm,
Cooling is accelerated using water-cooled after normalizing；Steel plate after normalized treatment is tempered, 640 DEG C of temperature, total heat time
3min/mm.Air cooling is used after tempering, 20MnMoNi55 steel plates are obtained.
The mechanical property of the steel plate of this example：Yield strength 563MPa, tensile strength：682MPa, 0 at steel plate thickness 1/2
DEG C average 201J of ballistic work.Three kinds of high temperature tension test good mechanical performances of different temperatures, 100 DEG C of high temperature tension test surrenders
Intensity 496MPa, tensile strength 625MPa；200 DEG C of high temperature tension tests yield strength 484MPa, tensile strength 620MPa；300
DEG C high temperature tension test yield strength 482MPa, tensile strength 614MPa.
Embodiment 3
Pressure vessel with 20MnMoNi55 steel plates is formed by following components in percentage by weight melting：C：0.25%, Si：
0.10%, Mn：1.50%, P：0.006%, S：0.005%, Cr：0.17%, Mo：0.52%, Ni：0.76%, Al：0.023%, Cu：
0.07%, V：0.002%, Ti：0.001%, remaining is Fe and inevitable impurity.The steel plate thickness of the present embodiment is 83mm.
The production method of the present embodiment 20MnMoNi55 steel plates, step is as follows：
（1）Steel making working procedure：Using converter smelting, the refining of LF stoves, continuous casting.Refining adjusting component, refines total time 60min, white slag
Retention time 36min, it is ensured that slag making is good, and the molten steel after refining is transferred to vacuum degassing furnace（VD stoves）Application of vacuum, vacuum
66Pa, retention time 34min, soft blow 6min；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
（2）Heating process：Steel billet is in 1260 DEG C of bringing-up section heating-up temperature, 1235 DEG C of soaking zone temperature, total heat time
12min/cm。
（3）Steel rolling process：Rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, the first stage rolls
Temperature processed is 1100 DEG C, and this stage single pass rolling reduction is 20%, and it is 40% to add up reduction ratio；Second stage rolling temperature is 900
DEG C, it is 38% to add up reduction ratio, and the reduction ratio of second stage single pass is 15%, and passage is 3 times, thickness steel plate needed for being obtained.
（4）Heat treatment step：Using normalizing+tempering heat treatment, 925 DEG C of normalizing temperature, total heat time 3min/mm, just
Cooling is accelerated using water-cooled after fire；Steel plate after normalized treatment is tempered, 635 DEG C of temperature, total heat time
3.5min/mm.Air cooling is used after tempering, 20MnMoNi55 steel plates are obtained.
The mechanical property of the steel plate of this example：Yield strength 545MPa, tensile strength：667MPa, 0 at steel plate thickness 1/2
DEG C average 195J of ballistic work.Three kinds of high temperature tension test good mechanical performances of different temperatures, 100 DEG C of high temperature tension test surrenders
Intensity 520MPa, tensile strength 662MPa；200 DEG C of high temperature tension tests yield strength 514MPa, tensile strength 648MPa；300
DEG C high temperature tension test yield strength 498MPa, tensile strength 612MPa.
Embodiment 4
Pressure vessel with 20MnMoNi55 steel plates is formed by following components in percentage by weight melting：C：0.15%, Si：
0.35%, Mn：1.50%, P：0.007%, S：0.004%, Cr：0.20%, Mo：0.55%, Ni：0.45%, Al：0.029%, Cu：
0.08%, V：0.003%, Ti：0.001%, remaining is Fe and inevitable impurity.The steel plate thickness of the present embodiment is 90mm.
The production method of the present embodiment 20MnMoNi55 steel plates, step is as follows：
（1）Steel making working procedure：Using converter smelting, the refining of LF stoves, continuous casting.Refining adjusting component, refines total time 62min, white slag
Retention time 36min, it is ensured that slag making is good, and the molten steel after refining is transferred to vacuum degassing furnace（VD stoves）Application of vacuum, vacuum
66Pa, retention time 39min, soft blow 6.5min；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
（2）Heating process：Steel billet is in 1250 DEG C of bringing-up section heating-up temperature, 1230 DEG C of soaking zone temperature, total heat time
13min/cm。
（3）Steel rolling process：Rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, the first stage rolls
Temperature processed is 1000 DEG C, and this stage single pass rolling reduction is 10%, and it is 50% to add up reduction ratio；Second stage rolling temperature is 895
DEG C, it is 40% to add up reduction ratio, and the reduction ratio of second stage single pass is 16%, and passage is 3 times, thickness steel plate needed for being obtained.
（4）Heat treatment step：Using normalizing+tempering heat treatment, 930 DEG C of normalizing temperature, total heat time 2.5min/mm,
Cooling is accelerated using water-cooled after normalizing；Steel plate after normalized treatment is tempered, 635 DEG C of temperature, total heat time
3min/mm.Air cooling is used after tempering, 20MnMoNi55 steel plates are obtained.
The mechanical property of the steel plate of this example：Yield strength 532MPa, tensile strength：651MPa, 0 at steel plate thickness 1/2
DEG C average 203J of ballistic work.Three kinds of high temperature tension test good mechanical performances of different temperatures, 100 DEG C of high temperature tension test surrenders
Intensity 518MPa, tensile strength 634MPa；200 DEG C of high temperature tension tests yield strength 513MPa, tensile strength 632MPa；300
DEG C high temperature tension test yield strength 502MPa, tensile strength 614MPa.
Embodiment 5
Pressure vessel with 20MnMoNi55 steel plates is formed by following components in percentage by weight melting：C：0.24%, Si：
0.26%, Mn：1.15%, P：0.007%, S：0.005%, Cr：0.20%, Mo：0.55%, Ni：0.85%, Al：0.050%, Cu：
0.06%, V：0.003%, Ti：0.001%, remaining is Fe and inevitable impurity.The steel plate thickness of the present embodiment is 95mm.
The production method of the present embodiment 20MnMoNi55 steel plates, step is as follows：
（1）Steel making working procedure：Using converter smelting, the refining of LF stoves, continuous casting.Refining adjusting component, refines total time 64min, white slag
Retention time 40min, it is ensured that slag making is good, and the molten steel after refining is transferred to vacuum degassing furnace（VD stoves）Application of vacuum, vacuum
61Pa, retention time 35min, soft blow 5min；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
（2）Heating process：Steel billet is in 1250 DEG C of bringing-up section heating-up temperature, 1250 DEG C of soaking zone temperature, total heat time
10min/cm。
（3）Steel rolling process：Rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, the first stage rolls
Temperature processed is 1055 DEG C, and this stage single pass rolling reduction is 20%, and it is 30% to add up reduction ratio；Second stage rolling temperature is 860
DEG C, it is 30% to add up reduction ratio, and the reduction ratio of second stage single pass is 16%, and passage is 4 times, thickness steel plate needed for being obtained.
（4）Heat treatment step：Using normalizing+tempering heat treatment, 930 DEG C of normalizing temperature, total heat time 3min/mm, just
Cooling is accelerated using water-cooled after fire；Steel plate after normalized treatment is tempered, 630 DEG C of temperature, total heat time
3.5min/mm.Air cooling is used after tempering, 20MnMoNi55 steel plates are obtained.
The mechanical property of the steel plate of this example：Yield strength 566MPa, tensile strength：684MPa, 0 at steel plate thickness 1/2
DEG C average 213J of ballistic work.Three kinds of high temperature tension test good mechanical performances of different temperatures, 100 DEG C of high temperature tension test surrenders
Intensity 554MPa, tensile strength 665MPa；200 DEG C of high temperature tension tests yield strength 534MPa, tensile strength 653MPa；300
DEG C high temperature tension test yield strength 506MPa, tensile strength 632MPa.
Embodiment 6
Pressure vessel with 20MnMoNi55 steel plates is formed by following components in percentage by weight melting：C：0.24%, Si：
0.26%, Mn：1.15%, P：0.012%, S：0.012%, Cr：0.20%, Mo：0.40%, Ni：0.85%, Al：0.010%, Cu：
0.12%, V：0.020%, Ti：0.030%, remaining is Fe and inevitable impurity.The steel plate thickness of the present embodiment is 80mm.
The production method of the present embodiment 20MnMoNi55 steel plates, step is as follows：
（1）Steel making working procedure：Using converter smelting, the refining of LF stoves, continuous casting.Refining adjusting component, refines total time 61min, white slag
Retention time 30min, it is ensured that slag making is good, and the molten steel after refining is transferred to vacuum degassing furnace（VD stoves）Application of vacuum, vacuum
60Pa, retention time 20min, soft blow 7min；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
（2）Heating process：Steel billet is in 1240 DEG C of bringing-up section heating-up temperature, 1230 DEG C of soaking zone temperature, total heat time
10min/cm。
（3）Steel rolling process：Rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, the first stage rolls
Temperature processed is 1055 DEG C, and this stage single pass rolling reduction is 20%, and it is 30% to add up reduction ratio；Second stage rolling temperature is 860
DEG C, it is 50% to add up reduction ratio, and the reduction ratio of second stage single pass is 10%, and passage is 6 times, thickness steel plate needed for being obtained.
（4）Heat treatment step：Using normalizing+tempering heat treatment, 910 DEG C of normalizing temperature, total heat time 3min/mm, just
Cooling is accelerated using water-cooled after fire；Steel plate after normalized treatment is tempered, 650 DEG C of temperature, total heat time 3min/
mm.Air cooling is used after tempering, 20MnMoNi55 steel plates are obtained.
The mechanical property of the steel plate of this example：Yield strength 576MPa, tensile strength：694MPa, 0 at steel plate thickness 1/2
DEG C average 223J of ballistic work.Three kinds of high temperature tension test good mechanical performances of different temperatures, 100 DEG C of high temperature tension test surrenders
Intensity 564MPa, tensile strength 675MPa；200 DEG C of high temperature tension tests yield strength 544MPa, tensile strength 673MPa；300
DEG C high temperature tension test yield strength 516MPa, tensile strength 642MPa.
Experiment is proved：Gained armor plate strength of the invention and toughness matching are good, the steel plate high comprehensive performance of production, quality
Well, low production cost, is capable of achieving to produce in enormous quantities.
Above example is only used to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacement, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover in power of the invention
In the middle of sharp claimed range.
Claims (10)
1. a kind of pressure vessel 20MnMoNi55 steel plates, it is characterised in that the steel plate chemical composition and weight/mass percentage composition
It is as follows：C：0.15~0.25%, Si：0.10~0.35%, Mn：1.15~1.50%, P≤0.012%, S≤0.012%, Cr≤
0.20%, Mo：0.40~0.55%, Ni：0.45~0.85%, Cu≤0.12%, Al：0.010~0.050%, V≤0.020%, Ti≤
0.030%, remaining is Fe and inevitable impurity.
2. a kind of pressure vessel 20MnMoNi55 steel plates according to claim 1, it is characterised in that the steel plate thickness
It is 70~95mm.
3. a kind of production method of the 20MnMoNi55 steel plates of the pressure vessel described in claim 1 or 2 is based on, and its feature exists
In the production method includes steel-making, heating, steel rolling and heat treatment step.
4. a kind of pressure vessel according to claim 3 production method of 20MnMoNi55 steel plates, it is characterised in that institute
Stating steel-making includes converter smelting, the refining of LF stoves and continuous casting working procedure；The LF stoves refining procedure refines total time >=60min, white slag
Retention time >=30min.
5. a kind of pressure vessel according to claim 3 production method of 20MnMoNi55 steel plates, it is characterised in that institute
Steel making working procedure is stated, the molten steel after refining is transferred to vacuum degassing furnace application of vacuum, vacuum≤66Pa is the retention time >=20min, soft
Blow 5~7min；Molten steel after smelting is carried out into continuous casting, continuous casting billet is obtained.
6. the production method of 20MnMoNi55 steel plates of a kind of pressure vessel according to claim 3-5 any one, its
It is characterised by, the heating process, in bringing-up section heating-up temperature≤1260 DEG C, soaking zone temperature is 1230~1250 DEG C to steel billet,
Total heat time >=10min/cm.
7. the production method of 20MnMoNi55 steel plates of a kind of pressure vessel according to claim 3-5 any one, its
It is characterised by, the steel rolling process, is rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, the first stage
Rolling temperature is 1000~1100 DEG C, and this stage single pass rolling reduction is 10~20%, and it is 30~50% to add up reduction ratio.
8. the production method of 20MnMoNi55 steel plates of a kind of pressure vessel according to claim 3-5 any one, its
It is characterised by, the steel rolling process, is rolled using recrystallization zone+Unhydrated cement two-phase control rolling technique, second stage
Rolling temperature is 860~900 DEG C, and it is 30~50%, reduction ratio >=10% of second stage single pass, passage >=3 to add up reduction ratio
It is secondary, thickness steel plate needed for being obtained.
9. the production method of 20MnMoNi55 steel plates of a kind of pressure vessel according to claim 3-5 any one, its
It is characterised by, the heat treatment step, using normalizing+tempering heat treatment, normalizing temperature is 910~930 DEG C, total heat time 2
~3min/mm, cooling is accelerated after normalizing using water-cooled.
10. the production method of 20MnMoNi55 steel plates of a kind of pressure vessel according to claim 3-5 any one, its
It is characterised by, the heat treatment step, using normalizing+tempering heat treatment, temperature is 630~650 DEG C, total heat time 3
~3.5min/mm；Air cooling is used after tempering, 20MnMoNi55 steel plates are obtained.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108315653A (en) * | 2018-05-09 | 2018-07-24 | 舞阳钢铁有限责任公司 | A kind of super thick ultra-wide steel plate and its normalizing heat treatment method |
| CN108486470A (en) * | 2018-05-09 | 2018-09-04 | 舞阳钢铁有限责任公司 | A kind of super thick ultra-wide steel plate and its die welding heat treatment method |
| CN108624813A (en) * | 2018-04-23 | 2018-10-09 | 舞阳钢铁有限责任公司 | With it is resistance to long when die welding hydrogen sulfide corrosion resistant tank plate and its production method |
| CN108754340A (en) * | 2018-06-01 | 2018-11-06 | 舞阳钢铁有限责任公司 | Q345R steel plates for manufacturing pressure vessel head and its production method |
| CN109972039A (en) * | 2019-04-09 | 2019-07-05 | 舞阳钢铁有限责任公司 | A kind of high-strength tenacity faces hydrogen pressure steel plate for container and its production method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732782A (en) * | 2012-06-05 | 2012-10-17 | 舞阳钢铁有限责任公司 | Production method of steel plate for heavy-gauge pressure vessel |
| CN102851578A (en) * | 2012-08-28 | 2013-01-02 | 舞阳钢铁有限责任公司 | Steel plate with super-large thickness for nuclear power engineering equipment and production method thereof |
-
2017
- 2017-02-22 CN CN201710096722.5A patent/CN106906423A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732782A (en) * | 2012-06-05 | 2012-10-17 | 舞阳钢铁有限责任公司 | Production method of steel plate for heavy-gauge pressure vessel |
| CN102851578A (en) * | 2012-08-28 | 2013-01-02 | 舞阳钢铁有限责任公司 | Steel plate with super-large thickness for nuclear power engineering equipment and production method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624813A (en) * | 2018-04-23 | 2018-10-09 | 舞阳钢铁有限责任公司 | With it is resistance to long when die welding hydrogen sulfide corrosion resistant tank plate and its production method |
| CN108315653A (en) * | 2018-05-09 | 2018-07-24 | 舞阳钢铁有限责任公司 | A kind of super thick ultra-wide steel plate and its normalizing heat treatment method |
| CN108486470A (en) * | 2018-05-09 | 2018-09-04 | 舞阳钢铁有限责任公司 | A kind of super thick ultra-wide steel plate and its die welding heat treatment method |
| CN108754340A (en) * | 2018-06-01 | 2018-11-06 | 舞阳钢铁有限责任公司 | Q345R steel plates for manufacturing pressure vessel head and its production method |
| CN109972039A (en) * | 2019-04-09 | 2019-07-05 | 舞阳钢铁有限责任公司 | A kind of high-strength tenacity faces hydrogen pressure steel plate for container and its production method |
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