CN104164573A - Premelting slag used for producing container steel of hydrogenation reactor and application thereof - Google Patents
Premelting slag used for producing container steel of hydrogenation reactor and application thereof Download PDFInfo
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- CN104164573A CN104164573A CN201410330345.3A CN201410330345A CN104164573A CN 104164573 A CN104164573 A CN 104164573A CN 201410330345 A CN201410330345 A CN 201410330345A CN 104164573 A CN104164573 A CN 104164573A
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Abstract
The invention discloses a premelting slag used for producing a container steel of a hydrogenation reactor and an application thereof. The premelting slag comprises the following components by weight percentage: 45-55% of CaF2, 20-30% of Al2O3, 15-25% of CaO, 0-5% of SiO and 0-5% of MgO. The application of the premelting slag for production of the container steel comprises an electroslag remelting and smelting step and a steel plate rolling step, and normalizing heat treatment is carried out after steel plate rolling is completed. By aiming at component requirement of the low silicon of the container steel, the premelting slag employs five-membered slag, wherein content of SiO2 and CaF2 is low, silicon content increase of the container steel of the hydrogenation reactor can be avoided, CaF2 volatilization is reduced, and synergism of Al2O3, CaO and MgO can obviously reduce the conductivity of the premelting slag, power consumption is reduced, productivity is increased, and the premelting slag of the present invention can be used for producing high purity container steel plate.
Description
Technical field
The invention belongs to Metal smelting technical field, be specifically related to a kind of for the production of the pre-melted slag of hydrogenator container steel and in the application of producing hydrogenator container steel.
Background technology
Pressure vessel steel purposes is extremely wide, is widely used in the industries such as oil, chemical industry, power station, boiler, is generally used for and makes reactor, heat exchanger, separator, airway, boiler-steam dome etc.12Cr2Mo1R container steel is mainly used in hydrogenator, it is the great key equipment of modern petroleum refining industry, its normally at High Temperature High Pressure, hydrogenation, have under the severe working conditions of the corrosive mediums such as hydrogen sulfide and move, therefore need anti-temper embrittlement ability, the strong starting material of anti-hydrogen etch ability to make hydrogenator.
Because hydrogenator is worked under high temperature, high pressure and hydroconversion condition, a series of the key technical indexes such as material purity, anti-embrittlement ability, internal soundness are required very harsh.The device of manufacturing hydrogenator uses the demand of large substance, super thick (being greater than 100mm) steel plate also increasing, for reducing the cost of manufacturing hydrogenation reaction apparatus and the safe reliability that improves device, require more and more stricter to the plate quality using.The special heavy plate mode of production, except adopting original forging method, also has popular continuous metal cast process at present.But continuous casting is produced and is subject to the restriction of technical qualification cannot produce the excessive special heavy plate of thickness.At present maximum revolving furnace continuous casting slab thickness is 390mm in the world, but due to the restriction of the inner segregation of continuous-casting converter billet and compression ratio, can only produce the high-performance special heavy plate that thickness is less than 100mm.
Through the steel of electric slag refusion and smelting, have that purity is high, sulphur content is low, non-metallic inclusion is few, surface of steel ingot is smooth, crystallization even compact, metal structure and a uniform advantage of chemical composition.And in esr process, pre-melted slag is a key factor that affects steel ingot internal soundness, esr can improve clarity, it has been generally acknowledged that and depends on to a great extent pre-melted slag composition, secondly relevant with the clarity of consumable electrode mother metal.The chemical composition of different pre-melted slags has determined specific conductivity, viscosity, fusing point and the surface tension of pre-melted slag, the viscosity of pre-melted slag not only affects the surface quality of steel ingot, also affect surface tension and the interfacial tension of pre-melted slag, the surface tension of pre-melted slag and molten steel interfacial surface tension finally affect the adsorptive power of non-metallic inclusion.And different steel grade chemical compositions is different, to pre-melted slag require different.In prior art, for reducing fusing point and the specific conductivity of pre-melted slag, improve the high-temp plastic of pre-melted slag, make ingot casting any surface finish, in pre-melted slag, often add more than 15% silicon-dioxide.But the pre-melted slag of high-content silicon-dioxide cannot adapt to the requirement of the low silicon of hydrogenator container steel.
Summary of the invention
One object of the present invention aims to provide a kind of pre-melted slag for the production of hydrogenator container steel, and this pre-melted slag, when for the preparation of hydrogenator container steel, can effectively reduce the clarity of steel grade non-metallic inclusion content, raising steel grade.
Another object of the present invention is to provide above-mentioned pre-melted slag in the application of producing hydrogenator container steel.
For realizing above-mentioned first object, technical scheme of the present invention is:
For the production of a pre-melted slag for hydrogenator container steel, the composition of this pre-melted slag and weight percent are:
CaF
2(Calcium Fluoride (Fluorspan)) 45～55%;
Al
2o
3(aluminum oxide) 20～30%;
CaO (calcium oxide) 15～25%;
SiO
2(silicon-dioxide) 0～5%;
MgO (magnesium oxide) 0～5%.
Preferably, described in this, the composition of pre-melted slag and weight percent are:
CaF
2(Calcium Fluoride (Fluorspan)) 45～50%;
Al
2o
3(aluminum oxide) 25～28%;
CaO (calcium oxide) 20～23%;
SiO
2(silicon-dioxide) 1～3%;
MgO (magnesium oxide) 3～5%.
Preferably, the composition of described pre-melted slag and weight percent are: CaF
2(Calcium Fluoride (Fluorspan)) 45～50%; Al
2o
3(aluminum oxide) 25～28%; CaO (calcium oxide) 20～23%; SiO
2(silicon-dioxide) 1～3%; MgO (magnesium oxide) 3～5%.
For realizing above-mentioned second object, the present invention adopts following technical scheme:
Above-mentioned pre-melted slag is being produced the application of hydrogenator container steel, comprises electric slag refusion and smelting step and steel plate rolling step:
1) electric slag refusion and smelting step: adopt low frequency (1-5Hz) bipolar series slab electroslag remelting furnace to carry out refusion and smelting electrode base metal.The chemical composition of the consumable electrode mother metal electrode base metal of described low frequency bipolar series slab electroslag remelting furnace and weight percent composition meet following requirement:
C:0.08～0.12%, Si:0.05～0.12%, Mn:0.30～0.45%, P :≤0.012%, S :≤0.010%, Cr:2.10～2.25%, Ni :≤0.18%, Mo:0.95～1.10%, Cu :≤0.12%, Sn :≤0.005%, As :≤0.004%, Sb :≤0.003%, N :≤0.008%, O≤0.003%, all the other are Fe and inevitable impurity;
Described pre-melted slag toasts after mixing at the temperature of 1650～1750 DEG C, and baking time is 4～5 hours; Pouring into cinder ladle slag after oven dry, after pre-melted slag changes into liquid, pour into and in electroslag remelting furnace crystallizer, carry out refusion and smelting, be no more than 1.0 grades with control inside steel billet A, B, C, D type impurity total amount, wherein do not allow to occur that A, B two classes are mingled with, Control of gas content is: [O]≤28ppm, [N]≤55ppm;
2) steel plate rolling step: adopt wide and heavy plate mill rolling thickness 120～160mm hydrogenator container steel steel plate, rolling technology is: 1200～1260 DEG C of Heating temperatures, 11～13 DEG C/mm of heating rate; First stage rolling adopts austenite recrystallization rolling, start rolling temperature is 1070 DEG C～1180 DEG C, rolling 3～5 passages, one-phase passage total reduction 50～70%, workpiece thickness is 1.3～1.4 times of finished product thicknesses, subordinate phase rolling adopts the rolling of austenite non-recrystallization, start rolling temperature is 860～900 DEG C, finishing temperature is 830～860 DEG C, rolling 4～6 passages, two-stage passage total reduction 30～50%; After completing, steel plate rolling carries out normalizing thermal treatment.
The present invention is directed to the composition requirement of the low silicon of hydrogenator container steel, pre-melted slag adopts five yuan of slag systems, wherein SiO
2and CaF
2content lower, avoided improving the silicone content of hydrogenator container steel, reduced CaF
2volatilization, by with Al
2o
3, CaO and MgO act synergistically, and can obviously reduce the specific conductivity of pre-melted slag, reduces power consumption, boost productivity; Utilize pre-melted slag of the present invention can on slab electroslag remelting furnace, produce highly purified hydrogenator container steel strand, by wide and heavy plate mill rolling processing, can production high purity hydrogenator tank plate.Technical process of the present invention has improved the production efficiency of thick specification hydrogenator container steel, has reduced cost, has promoted product competitiveness.
Brief description of the drawings
Fig. 1 is the hydrogenator container steel 12Cr2Mo1R metallographic examination organization chart that pre-melted slag of the present invention is produced.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
The production technique that the present invention produces the thick high clarity hydrogenator container steel of 120～160mm equally comprises electric slag refusion and smelting step and steel plate rolling step with prior art, and described electric slag refusion and smelting step adopts low frequency bipolar series slab electroslag remelting furnace to carry out refusion and smelting, different is that electrode base metal chemical composition and the weight percent of low frequency bipolar series slab electroslag remelting furnace of the present invention meets following requirement:
C:0.08～0.12%, Si:0.05～0.12%, Mn:0.30～0.45%, P :≤0.012%, S :≤0.010%, Cr:2.10～2.25%, Ni :≤0.18%, Mo:0.95～1.10%, Cu :≤0.12%, Sn :≤0.005%, As :≤0.004%, Sb :≤0.003%, N :≤0.008%, O≤0.003%, all the other are Fe and inevitable impurity;
Composition and the weight percent of the pre-melted slag for the production of the thick hydrogenator container steel of 120～160mm of the present invention are: CaF
2(Calcium Fluoride (Fluorspan)) 45～55%; Al
2o
3(aluminum oxide) 20～30%; CaO (calcium oxide) 15～25%; SiO
2(silicon-dioxide) 0～5%; MgO (magnesium oxide) 0～5%.
Pre-melted slag is specially CaF in the present embodiment
2(Calcium Fluoride (Fluorspan)) 50%, Al
2o
3(aluminum oxide) 25%, CaO (calcium oxide) 20%, SiO
2(silicon-dioxide) 2%, MgO (magnesium oxide) 3%, be mixed into pre-melted slag slag charge by said components;
Then pre-melted slag slag charge is toasted at the temperature of 1650～1750 DEG C, baking time is 4～5 hours; Pouring into cinder ladle slag after oven dry, changes into liquid state through 2～2.5 hours pre-melted slags; Pour into and in electroslag remelting furnace crystallizer, carry out refusion and smelting, controlling inside steel billet A, B, C, D type impurity total amount is no more than 1.0 grades, does not wherein allow to occur that A, B two classes are mingled with; Gas content is strictly controlled, [O]≤28ppm, [N]≤55ppm.
Steel plate rolling step of the present invention is:
Rolling technology is: 1200～1260 DEG C of Heating temperatures, 11～13 DEG C/mm of heating rate; First stage rolling adopts austenite recrystallization rolling, start rolling temperature is 1070 DEG C～1180 DEG C, rolling 3～5 passages, one-phase passage total reduction 50～70%, 1.3～1.4 times of finished product thicknesses of workpiece thickness, subordinate phase rolling adopts the rolling of austenite non-recrystallization, start rolling temperature is 860～900 DEG C, finishing temperature is 830～860 DEG C, rolling 4～6 passages, two-stage passage total reduction 30～50%; After completing, steel plate rolling carries out normalizing thermal treatment.
The hydrogenator container steel (two Duplicate Samples) that adopts the embodiment of the present invention to produce, carries out every inspection to steel plate, detects non-metallic inclusion data and is shown in Table 1, and mechanical property is as shown in table 2.
Can find out from the result of Fig. 1, the hydrogenator container steel that adopts pre-melted slag of the present invention to produce, metallographic structure is more even, and its inner non-metallic inclusion only has C, D class, and clarity is higher, and mechanics mechanical property is better.
Table 1 hydrogenator container steel steel plate non-metallic inclusion data
The contrast of table 2 hydrogenator container steel mechanical properties test result
Claims (4)
1. for the production of a pre-melted slag for hydrogenator container steel, it is characterized in that: the composition of this pre-melted slag and weight percent are:
CaF
2：45～55％；Al
2O
3：20～30％；CaO：15～25％；SiO
2：0～5％；MgO：0～5％。
2. the pre-melted slag for the production of hydrogenator container steel according to claim 1, is characterized in that: the composition of this pre-melted slag and weight percent are:
CaF
2：45～50％；Al
2O
3：25～28％；CaO：20～23％；SiO
2：1～3％；MgO：3～5％。
3. the pre-melted slag for the production of hydrogenator container steel according to claim 2, is characterized in that: the composition of this pre-melted slag and weight percent are:
CaF
2：45～50％；Al
2O
3：25～28％；CaO：20～23％；SiO
2：1～3％；MgO：3～5％。
4. the pre-melted slag described in claims 1 to 3 any one is being produced the application of hydrogenator container steel, it is characterized in that: comprise electric slag refusion and smelting step and steel plate rolling step:
1) electric slag refusion and smelting step: adopt low frequency bipolar series slab electroslag remelting furnace to carry out refusion and smelting electrode base metal; The chemical composition of the consumable electrode mother metal electrode base metal of described low frequency bipolar series slab electroslag remelting furnace and weight percent composition meet following requirement:
C:0.08～0.12%, Si:0.05～0.12%, Mn:0.30～0.45%, P :≤0.012%, S :≤0.010%, Cr:2.10～2.25%, Ni :≤0.18%, Mo:0.95～1.10%, Cu :≤0.12%, Sn :≤0.005%, As :≤0.004%, Sb :≤0.003%, N :≤0.008%, O≤0.003%, all the other are Fe and inevitable impurity;
Described pre-melted slag toasts after mixing at the temperature of 1650～1750 DEG C, and baking time is 4～5 hours; Pouring into cinder ladle slag after oven dry, after pre-melted slag changes into liquid, pour into and in electroslag remelting furnace crystallizer, carry out refusion and smelting, be no more than 1.0 grades with control inside steel billet A, B, C, D type impurity total amount, wherein do not allow to occur that A, B two classes are mingled with, Control of gas content is: [O]≤28ppm, [N]≤55ppm;
2) steel plate rolling step: adopt wide and heavy plate mill rolling thickness 120～160mm hydrogenator container steel steel plate, rolling technology is: 1200～1260 DEG C of Heating temperatures, 11～13 DEG C/mm of heating rate; First stage rolling adopts austenite recrystallization rolling, start rolling temperature is 1070 DEG C～1180 DEG C, rolling 3～5 passages, one-phase passage total reduction 50～70%, workpiece thickness is 1.3～1.4 times of finished product thicknesses, subordinate phase rolling adopts the rolling of austenite non-recrystallization, start rolling temperature is 860～900 DEG C, finishing temperature is 830～860 DEG C, rolling 4～6 passages, two-stage passage total reduction 30～50%; After completing, steel plate rolling carries out normalizing thermal treatment.
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|---|---|---|---|
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| CN104561569A (en) * | 2015-01-14 | 2015-04-29 | 中原特钢股份有限公司 | Preparation and use process for electroslag remelting slag |
| CN105861847A (en) * | 2016-04-19 | 2016-08-17 | 四川六合锻造股份有限公司 | Quinary electroslag remelting system and production method applying quinary electroslag remelting system to 3379B blade steel material |
| CN105886791A (en) * | 2016-06-22 | 2016-08-24 | 四川六合锻造股份有限公司 | Method for preventing silicon increase in low-silicon steel during electroslag remelting |
| CN106244780A (en) * | 2016-08-29 | 2016-12-21 | 沈阳科金特种材料有限公司 | A kind of control method of nuclear power forging material hydrogen content |
| CN107488788A (en) * | 2017-07-31 | 2017-12-19 | 辽宁科技大学 | A kind of special slag system and its preparation and application for being used to produce 17 4PH steel ingots |
| CN108342619A (en) * | 2018-03-30 | 2018-07-31 | 四川六合锻造股份有限公司 | A kind of high tenacity highly anti-fatigue system containing yttrium nickel base superalloy and preparation method thereof |
| CN108374108A (en) * | 2018-03-30 | 2018-08-07 | 四川六合锻造股份有限公司 | A kind of high intensity highly corrosion resistant system containing thallium nickel base superalloy and preparation method thereof |
| CN108411162A (en) * | 2018-03-30 | 2018-08-17 | 四川六合锻造股份有限公司 | A kind of High-temperature resistant alloy material of strong mechanical performance and low impurity content |
| CN110306109A (en) * | 2019-07-09 | 2019-10-08 | 舞阳钢铁有限责任公司 | A kind of production method of big substance Cr-Mo steel ESR ingot |
| CN110358930A (en) * | 2019-08-13 | 2019-10-22 | 哈尔滨威尔焊接有限责任公司 | A kind of method of the electro slag remelting slag that sulphur can be protected and electroslag remelting |
| CN111139393A (en) * | 2019-12-14 | 2020-05-12 | 张家港广大特材股份有限公司 | Smelting method of austenitic stainless steel for 316H nuclear power |
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Cited By (15)
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| CN104561569A (en) * | 2015-01-14 | 2015-04-29 | 中原特钢股份有限公司 | Preparation and use process for electroslag remelting slag |
| CN105861847B (en) * | 2016-04-19 | 2018-07-20 | 四川六合锻造股份有限公司 | Five yuan of electroslag remelting slags and its production method applied to 3379B blade Steel materials |
| CN105861847A (en) * | 2016-04-19 | 2016-08-17 | 四川六合锻造股份有限公司 | Quinary electroslag remelting system and production method applying quinary electroslag remelting system to 3379B blade steel material |
| CN105886791A (en) * | 2016-06-22 | 2016-08-24 | 四川六合锻造股份有限公司 | Method for preventing silicon increase in low-silicon steel during electroslag remelting |
| CN105886791B (en) * | 2016-06-22 | 2018-07-24 | 四川六合锻造股份有限公司 | A method of prevent low-silicon steel from increasing silicon in electroslag remelting |
| CN106244780A (en) * | 2016-08-29 | 2016-12-21 | 沈阳科金特种材料有限公司 | A kind of control method of nuclear power forging material hydrogen content |
| CN107488788A (en) * | 2017-07-31 | 2017-12-19 | 辽宁科技大学 | A kind of special slag system and its preparation and application for being used to produce 17 4PH steel ingots |
| CN107488788B (en) * | 2017-07-31 | 2019-02-26 | 辽宁科技大学 | It is a kind of for producing the dedicated slag system and its preparation and application of 17-4PH steel ingot |
| CN108342619A (en) * | 2018-03-30 | 2018-07-31 | 四川六合锻造股份有限公司 | A kind of high tenacity highly anti-fatigue system containing yttrium nickel base superalloy and preparation method thereof |
| CN108374108A (en) * | 2018-03-30 | 2018-08-07 | 四川六合锻造股份有限公司 | A kind of high intensity highly corrosion resistant system containing thallium nickel base superalloy and preparation method thereof |
| CN108411162A (en) * | 2018-03-30 | 2018-08-17 | 四川六合锻造股份有限公司 | A kind of High-temperature resistant alloy material of strong mechanical performance and low impurity content |
| CN110306109A (en) * | 2019-07-09 | 2019-10-08 | 舞阳钢铁有限责任公司 | A kind of production method of big substance Cr-Mo steel ESR ingot |
| CN110358930A (en) * | 2019-08-13 | 2019-10-22 | 哈尔滨威尔焊接有限责任公司 | A kind of method of the electro slag remelting slag that sulphur can be protected and electroslag remelting |
| CN110358930B (en) * | 2019-08-13 | 2021-01-05 | 哈尔滨威尔焊接有限责任公司 | Electroslag remelting slag capable of protecting sulfur and electroslag remelting method |
| CN111139393A (en) * | 2019-12-14 | 2020-05-12 | 张家港广大特材股份有限公司 | Smelting method of austenitic stainless steel for 316H nuclear power |
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Application publication date: 20141126 |