CN108624812A - Ammonia convertor equipment special thick electroslag plate and preparation method thereof - Google Patents
Ammonia convertor equipment special thick electroslag plate and preparation method thereof Download PDFInfo
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- CN108624812A CN108624812A CN201810366877.0A CN201810366877A CN108624812A CN 108624812 A CN108624812 A CN 108624812A CN 201810366877 A CN201810366877 A CN 201810366877A CN 108624812 A CN108624812 A CN 108624812A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- 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
- C21D8/0257—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
-
- 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
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of ammonia convertor equipment special thick electroslag plates and preparation method thereof, and chemical composition and mass percentage are：C 0.10%~0.15%, Si 0.50%~0.58%, Mn 0.40%~0.50%, P≤0.006%, S≤0.006%, Cr 1.40%~1.50%, Mo 0.60%~0.65%, Ni 0.15%~0.20%, Cu≤0.20%, As≤0.005%, Sn≤0.004%, Sb≤0.003%, surplus are Fe and inevitable impurity.This electroslag plate reduces C, Si, Mn content in steel, increases Cr, Mo content, and using the multi-element composite micro-alloying of low C, Si and Mn, the effect of reinforced alloys element Cr, Mo improves the low-temperature impact toughness of steel plate while ensureing armor plate strength；The content of C plays main function to the mechanical performance of steel, and in steel and other alloying elements form carbide, and armor plate strength is made to increase；The residual element contents such as harmful element P, S and As, Sn and Sb reduce as much as possible under conditions of equipment, technique are satisfied by, and to make, steel is pure, good mechanical performance.
Description
Technical field
The invention belongs to metallurgical technology field, especially a kind of ammonia convertor equipment special thick electroslag plate and its preparation side
Method.
Background technology
Also increasingly thicker with enlargement, the wall thickness increasingly of ammonia convertor equipment, the industries such as oil coal chemical industry are to the equipment
Crucial pressure cylinder material it is anti-it is severe, the requirement of extreme environment is also higher and higher.For meet above-mentioned equipment manufacture industry for
The craving of big thickness quality plate needs to develop intensity and toughness more preferably special hard chromium molybdenum steel plate.
Invention content
The technical problem to be solved in the present invention is to provide a kind of special thick electroslag plates of high performance ammonia convertor equipment；This hair
It is bright to additionally provide a kind of preparation method of the special thick electroslag plate of ammonia convertor equipment.
In order to solve the above technical problems, chemical composition of the present invention and mass percentage are：C 0.10%~0.15%, Si
0.50%~0.58%, Mn 0.40%~0.50%, P≤0.006%, S≤0.006%, Cr 1.40%~1.50%, Mo 0.60%~
0.65%, Ni 0.15%~0.20%, Cu≤0.20%, As≤0.005%, Sn≤0.004%, Sb≤0.003%, surplus is for Fe and not
Evitable impurity.
Electroslag plate thickness of the present invention is 175mm~180mm.
The method of the present invention includes smelting, continuous casting, electroslag remelting, heating, rolling, expands hydrogen annealing and heat treatment procedure；It is described
The chemical composition and mass percentage of electroslag plate are as described above.
Heating process described in the method for the present invention：1260~1280 DEG C of maximum heating temperature, 1250~1260 DEG C of soaking temperature.
Rolling process described in the method for the present invention：The operation of rolling uses II type controlled rolling, steel thickness G of drying in the air 1.5 times of finished steel plate thickness of T.GT.GT
Degree；II stage start rolling temperature≤940 DEG C, last every time reduction ratio >=10% of 3 passage roll rear ACC water coolings to≤730 DEG C.
Expand hydrogen annealing process described in the method for the present invention：70~75h, temperature rate 50~55 are kept the temperature at 620~660 DEG C
℃/h。
Heat treatment procedure described in the method for the present invention：910~940 DEG C of normalizing temperature keeps the temperature 2~2.5min/mm, water after normalizing
It is cold；680~690 DEG C of temperature keeps the temperature 2~2.5min/mm.
It is using advantageous effect caused by above-mentioned technical proposal：What the present invention formulated in ASME standards
It is improved on the basis of SA387Gr11CL2 plate specifications, reduces C, Si, Mn content in steel, increase Cr, Mo content,
Using the multi-element composite micro-alloying of low C, Si and Mn, the effect of reinforced alloys element Cr, Mo is ensureing the same of armor plate strength
When, improve the low-temperature impact toughness of steel plate.C content 0.10~0.15% in the present invention；The content of C plays the mechanical performance of steel
Main function, in steel and other alloying elements form carbide, and armor plate strength is made to increase；At the same time, it is improvement special heavy plate
Low-temperature impact toughness, C content again cannot be too high, it is necessary to control just may be implemented in a certain range；Harmful element P, S and
The residual element contents such as As, Sn and Sb reduce as much as possible under conditions of equipment, technique are satisfied by, to make steel it is pure,
Good mechanical performance.
Each element component and proportioning in steel plate are optimized in the method for the present invention, ensure that every mechanical property of steel plate is full
Requirement in sufficient ASME standards and there is larger surplus capacity；The method of the present invention optimization element proportioning is mutually tied with rolling, heat treatment process
The technique processing method of conjunction, by selecting alloying component ratio, the corresponding rolling of adjustment and heat treatment process appropriate so that institute
The steel plate of production meets I grade and C grades of American Standard SA578/578M in domestic NB/T47013.3 non-destructive testing standards of requirement simultaneously.This hair
The excellent mechanical of bright the produced steel plate of method, stable quality, 350~517MPa of yield strength, tensile strength 520~
670MPa, elongation percentage >=22%.The steel plate that the method for the present invention is produced has the spies such as higher, the uniform, interior solid of ingredient of degree of purity
Point, mechanical property fully meet standard requirement, the design of entirely appropriate large thick-wall ammonia convertor equipment key pressure-containing member with
Manufacture.
Specific implementation mode
The present invention will be further described in detail with reference to the specific embodiments.
This ammonia convertor equipment preparation method of special thick electroslag plate include smelting, continuous casting, electroslag remelting, heating, rolling,
Expand hydrogen annealing and heat treatment procedure, each process technique are as described below：
（1）Smelting procedure：
A, just refining：Dispensing is reinforced in steel-making, selects impurity and the few molten iron and steel scrap of residual elements；
B, it refines：First steel-making water is contained in ladle, each element ingredient and proportioning are adjusted；Total time >=65min is refined, white slag is protected
Hold the time >=35min, it is ensured that slag making is good；Lime consumption >=20kg/t steel, to ensure refining effect；
C, it is vacuum-treated：Refined molten steel is transferred in vacuum degassing furnace and is vacuum-treated, vacuum degree 66Pa and when following holding
Between >=25min, bull ladle after soft blow time >=15min；Tapping molten steel enters casting process.
（2）Continuous casting working procedure：Molten steel after vacuum processing is subjected to continuous casting, obtains continuous casting billet；Fall steel billet using flame Wen Qing
The defects of surface crackle that may be present, rimhole.
（3）Electroslag remelting process：Continuous casting billet is welded into electrode, using 980mm section crystallizers in electroslag refining furnace
Electroslag remelting is carried out, ESR ingot is obtained, enters the next step after band temperature cleaning.
（4）Heating process：It is heated using soaking pit；Maximum heating temperature 1260 of the ESR ingot in soaking pit~
1280 DEG C, 1250~1260 DEG C of soaking temperature；Do not allow certain section of burning nozzle fully closed in entire heating process.
（5）Rolling process：Using once lumber-preserving, the operation of rolling uses II type controlled rolling, steel thickness G of drying in the air 1.5 times of finished steel plates of T.GT.GT
Thickness.II stage start rolling temperature≤940 DEG C must ensure last every time reduction ratio >=10% of 3 passage；Steel plate roll after by ACC after
Continuous watering, control steel plate are cooled to temperature≤730 DEG C.
（6）Expand hydrogen annealing process：Steel plate arranges to carry out expansion hydrogen annealing into car-bottom furnace after rolling in time；Expand hydrogen annealing process：
620~660 DEG C of heat preservations 70~75h, 50~55 DEG C/h of temperature rate.
（7）Heat treatment procedure：Using normalizing+temper；Normalizing, normalizing temperature are carried out to steel plate of the flaw detection after qualified
910~940 DEG C, keep the temperature 2~2.5min/mm plate thickness, water cooling after normalizing；680~690 DEG C of temperature keeps the temperature 2~2.5min/
Mm plate thickness, you can obtain the thick electroslag plate of the spy.
Embodiment 1-6：This ammonia convertor equipment uses following concrete technologies with the preparation method of special thick electroslag plate.
（1）Special thickness electroslag plate chemical composition composition and mass percentage and thickness are shown in Table 1 in each embodiment.
Table 1：Special thickness electroslag plate chemical composition composition in each embodiment（wt%）
In table 1, the surplus of chemical composition is Fe and inevitable impurity.
（2）The specific process parameter of smelting procedure to heating process is shown in Table 2 in each embodiment, and hydrogen annealing and heat are expanded in rolling
The specific process parameter for the treatment of process is shown in Table 3.
Table 2：Smelt the technological parameter of heating process
Table 3：Rolling, the technological parameter for expanding hydrogen annealing and heat treatment procedure
In table 3, the start rolling temperature in rolling process is II stage start rolling temperature.
（3）Special thick electroslag plate obtained by each embodiment carries out mechanical property test, and performance data is shown in Table 4.Obtained by each embodiment
Special thickness electroslag plate carries out ultrasonic examination inspection, flaw detection data one by one according to NB/T47013.3 and SA578/578M double standards
It is shown in Table 5.
Table 4：The mechanical property of each embodiment steel plate
Table 5：Each embodiment steel plate inspection result
It can be seen that obtained by this method from mechanical property, the result of detection of 5 each embodiment steel plate of table of 4 each embodiment steel plate of table
Steel plate while drawing performance with good stretching and height also there is good low-temperature impact toughness, result of detection to reach
C grades of requirements of I grade of NB/T47013 and SA578/578M standards, high comprehensive performance.
Claims (7)
1. a kind of special thick electroslag plate of ammonia convertor equipment, which is characterized in that its chemical composition and mass percentage are：C
0.10%~0.15%, Si 0.50%~0.58%, Mn 0.40%~0.50%, P≤0.006%, S≤0.006%, Cr 1.40%~
1.50%, Mo 0.60%~0.65%, Ni 0.15%~0.20%, Cu≤0.20%, As≤0.005%, Sn≤0.004%, Sb≤
0.003%, surplus is Fe and inevitable impurity.
2. the special thick electroslag plate of ammonia convertor equipment according to claim 1, it is characterised in that：The electroslag plate thickness is
175mm~180mm.
3. a kind of ammonia convertor equipment preparation method of special thick electroslag plate, it is characterised in that：The method includes smelting, even
Casting, heating, rolling, expands hydrogen annealing and heat treatment procedure at electroslag remelting；The chemical composition and mass percentage of the electroslag plate
For：C 0.10%~0.15%, Si 0.50%~0.58%, Mn 0.40%~0.50%, P≤0.006%, S≤0.006%, Cr
1.40%~1.50%, Mo 0.60%~0.65%, Ni 0.15%~0.20%, Cu≤0.20%, As≤0.005%, Sn≤0.004%,
Sb≤0.003%, surplus are Fe and inevitable impurity.
4. the ammonia convertor equipment according to claim 3 preparation method of special thick electroslag plate, which is characterized in that described to add
Thermal process：1260~1280 DEG C of maximum heating temperature, 1250~1260 DEG C of soaking temperature.
5. the ammonia convertor equipment according to claim 3 preparation method of special thick electroslag plate, which is characterized in that described to roll
Process processed：The operation of rolling uses II type controlled rolling, steel thickness G of drying in the air 1.5 times of finished steel plate thickness of T.GT.GT；II stage start rolling temperature≤940
DEG C, last every time reduction ratio >=10% of 3 passage rolls rear ACC water coolings to≤730 DEG C.
6. the ammonia convertor equipment according to claim 3 preparation method of special thick electroslag plate, which is characterized in that the expansion
Hydrogen annealing process：70~75h, 50~55 DEG C/h of temperature rate are kept the temperature at 620~660 DEG C.
7. the ammonia convertor equipment preparation method of special thick electroslag plate according to claim 3-6 any one, feature
It is, the heat treatment procedure：910~940 DEG C of normalizing temperature keeps the temperature 2~2.5min/mm, water cooling after normalizing；Temperature
680~690 DEG C, keep the temperature 2~2.5min/mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810366877.0A CN108624812A (en) | 2018-04-23 | 2018-04-23 | Ammonia convertor equipment special thick electroslag plate and preparation method thereof |
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| CN201810366877.0A CN108624812A (en) | 2018-04-23 | 2018-04-23 | Ammonia convertor equipment special thick electroslag plate and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868411A (en) * | 2019-01-28 | 2019-06-11 | 舞阳钢铁有限责任公司 | A kind of electroslag type low-alloy structural steel plate and its production method |
| CN110952034A (en) * | 2019-11-28 | 2020-04-03 | 舞阳钢铁有限责任公司 | Large-thickness hydroelectric S550Q steel plate and production method thereof |
| CN113088633A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | Production method of Cr-Mo steel plate |
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| CN101713054A (en) * | 2009-12-28 | 2010-05-26 | 舞阳钢铁有限责任公司 | Large thickness steel plate for hydrogenation reaction chamber reeling equipment and production method thereof |
| CN102181806A (en) * | 2011-04-15 | 2011-09-14 | 舞阳钢铁有限责任公司 | Thick chromium-molybdenum steel plate for hydrogenation equipment and production method thereof |
| CN103320721A (en) * | 2013-06-21 | 2013-09-25 | 舞阳钢铁有限责任公司 | Chrome-molybdenum steel plate requiring to keep yield and strength lower limits under thickness stretching and high stretching and production method thereof |
| CN104947005A (en) * | 2015-06-08 | 2015-09-30 | 舞阳钢铁有限责任公司 | Large-thickness and high-performance hydroforming 14Cr1MoR steel plate and production method thereof |
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2018
- 2018-04-23 CN CN201810366877.0A patent/CN108624812A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713054A (en) * | 2009-12-28 | 2010-05-26 | 舞阳钢铁有限责任公司 | Large thickness steel plate for hydrogenation reaction chamber reeling equipment and production method thereof |
| CN102181806A (en) * | 2011-04-15 | 2011-09-14 | 舞阳钢铁有限责任公司 | Thick chromium-molybdenum steel plate for hydrogenation equipment and production method thereof |
| CN103320721A (en) * | 2013-06-21 | 2013-09-25 | 舞阳钢铁有限责任公司 | Chrome-molybdenum steel plate requiring to keep yield and strength lower limits under thickness stretching and high stretching and production method thereof |
| CN104947005A (en) * | 2015-06-08 | 2015-09-30 | 舞阳钢铁有限责任公司 | Large-thickness and high-performance hydroforming 14Cr1MoR steel plate and production method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868411A (en) * | 2019-01-28 | 2019-06-11 | 舞阳钢铁有限责任公司 | A kind of electroslag type low-alloy structural steel plate and its production method |
| CN110952034A (en) * | 2019-11-28 | 2020-04-03 | 舞阳钢铁有限责任公司 | Large-thickness hydroelectric S550Q steel plate and production method thereof |
| CN113088633A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | Production method of Cr-Mo steel plate |
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Application publication date: 20181009 |