CN108977731A - A kind of high performance corrosion-proof moving pressure container steel plate and its manufacturing method - Google Patents
A kind of high performance corrosion-proof moving pressure container steel plate and its manufacturing method Download PDFInfo
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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
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/04—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
Abstract
The present invention relates to steel alloy manufacturing technology field, specifically a kind of high performance corrosion-proof moving pressure container steel plate and its manufacturing method, steel plate chemical component is formed and mass percentage is as follows: C:0.12~0.18%, Si:0.10~0.60%, Mn:1.10~1.74%, P≤0.013%, S≤0.004%, Ni:0.10~0.30%, V:0.032~0.055%, Nb :≤0.06%, Ti:0.008~0.020%, N:0.009 ~ 0.025% meets simultaneously: Ti/N≤4.0, Nb+V+Ti≤0.11%；Remaining is Fe and is inevitably mingled with；Yield strength >=430MPa of the steel plate, 600 ~ 720MPa of tensile strength, elongation percentage >=20%, lateral -50 DEG C of KV2 >=60J of steel plate；Corrosion resistance with higher simultaneously, especially suitable for making more demanding transportable pressure vessel.
Description
Technical field
The present invention relates to steel alloy manufacturing technology field, specifically a kind of high performance corrosion-proof moving pressure container steel plate
And its manufacturing method.
Background technique
With China's rapid economic development, industrialization, urbanization process accelerate, petrochemical industry, gas industry and energy work
Industry is constantly fast-developing and promotes, the feature that transportable pressure vessel is flexible with its, convenient, in liquid (or liquid state) fuel and
Important, irreplaceable role is played in the conveying of industrial chemicals.
Transportable pressure vessel is divided into truck tank, tank car and tank container.Transportable pressure vessel storage and transportation
Medium is liquefied gas, cryogenic liquid and permanent gas, such as liquefied petroleum gas, ethylene oxide, liquid oxygen, liquefied ammonia, liquid titanium dioxide
Carbon, liquefied natural gas and compressed natural gas, hydrogen etc..Domestic at present is mostly that steel of the tensile strength less than 550MPa grades causes tank
Body wall thickness is larger, and ratio of light weight to loading capacity accordingly increases, and volume to weight ratio is small, delivers low efficiency.It is right with the fast development of the development of the national economy
It is increasingly prominent in the demand of high-strength corrosion-resisting transportable pressure vessel steel plate.
The patent document of Publication No. CN103556047A discloses a kind of 450MPa grades of resistance against hydrogen cracking pressure vessel use
Steel plate and its production method, but its yield strength only >=300MPa, tensile strength only >=450MPa, and require nothing more than 0 DEG C of impact
Function >=200J.
The patent document of Publication No. CN107099746A discloses a kind of normalizing type pressure vessel High-Strength Low-Alloy
Steel plate and its production method, but its yield strength only >=415MP, tensile strength is only 550 ~ 690MPa, does not refer to its impact
Performance and corrosion resistance, and do not specify the microscopic structure of the steel.
The patent document of Publication No. CN106756525A discloses LPG tank truck steel plate and its preparation side
Method, but which provides only -20 DEG C of impact properties, do not refer to corrosion resistance, and do not specify the microscopic structure of the steel.
Summary of the invention
The object of the invention is to provide a kind of high property to solve deficiency existing for above-mentioned existing steels for pressure vessel use
The corrosion-resistant moving pressure container steel plate of energy and its manufacturing method, yield strength >=430MPa, 600 ~ 720MPa of tensile strength,
Elongation percentage >=20%, -50 DEG C of ballistic work >=60J have good corrosion resistance, and tensile strength reaches 600MPa grades.
Concrete scheme of the invention is: a kind of high performance corrosion-proof moving pressure container steel plate, the steel plate chemistry at
It is grouped as and mass percentage is as follows: C:0.12~0.18%, Si:0.10~0.60%, Mn:1.10~1.74%, P≤
0.013%, S≤0.004%, Ni:0.10~0.30%, V:0.032~0.055%, Nb :≤0.06%, Ti:0.008~0.020%,
N:0.009 ~ 0.025% meets simultaneously: Ti/N≤4.0, Nb+V+Ti≤0.11%；Remaining is Fe and is inevitably mingled with.
The mechanical property of steel plate of the present invention: yield strength >=430MPa, 600 ~ 720MPa of tensile strength, elongation percentage >=
20%, lateral -50 DEG C of KV2 >=60J of steel plate.
The metallographic structure of steel plate of the present invention is based on ferrite and pearlite.
The manufacturing method of steel plate of the present invention is the following steps are included: desulfurizing iron processing → converter top and bottom blowing → LF essence
Refining → RH furnace vacuum processing → slab slow cooling → rolling → section cooling → normalizing → inspection；
The technological parameter that wherein RH furnace is vacuum-treated is as follows: vacuum time is no less than 18min, while nitrogen pick-up and control nitrogen, vacuum mistake
Si-Ca is handled in journey, carries out electromagnetic agitation before continuous casting, and when continuous casting carries out dynamic soft-reduction processing；
Wherein roll and cooling by the progress of high-strength steel technique: slab heating temperature is 1220 ~ 1260 DEG C before rolling, and the rate of heat addition is
8 ~ 12min/cm, the roughing start rolling temperature of steel are >=1100 DEG C, roughing finishing temperature >=1000 DEG C, finish rolling start rolling temperature≤970
DEG C, finish rolling finishing temperature is 820 ~ 900 DEG C, steel plate 600 ~ 750 DEG C of red temperature after cooling；
Wherein the technological parameter of normalizing is as follows: heating temperature is 850 ~ 920 DEG C, 40 ~ 60min of soaking time, using air-cooled mode
It is cooling.
In rolling mill practice of the present invention, roughing reduction in pass is greater than 25mm, and three percentage pass reductions of finish rolling end are greater than
30%。
Steel grade rolling pattern of the present invention is shown in Table 1
Heat treating regime is shown in Table 2
。
The ingredient and production technology of steel of the present invention described below set reason.
1, the reasons why chemical component (C, Si, Mn, P, S, Ni, Nb, V, Ti, N) limited amount:
Consider that the steel is mainly to ensure that high-intensitive, high tenacity and good welding performance.Therefore, strict control steel is wanted when steel-making
The degree of purity of water prevents influence of P, S content to the steel low-temperature flexibility.C, Mn, Nb, V, Ti, N be designed to point ensure that steel
Obdurability, Ni alloy are used to improve the low-temperature flexibility and corrosion resistance of steel.P≤0.008% is set, and S≤0.002% adds simultaneously
Add Si-Ca to handle, mainly in view of these elements are affected to steel brittleness, strictly to limit its content, reduce steel
Microstructure segregation tendency.
(1) influence of the alloying element to Steel Properties
C:C is to improve the most effective element of steel strength, and with the increase of C content, Fe3C increases in steel, and hardenability also increases,
The tensile strength and yield strength of steel improve.But increase C content in steel, it will increase steel plate tissue degree of segregation, be unfavorable for resisting
Acid corrosion.Therefore, with reference to the ingredient design scheme of existing pressure vessel steel, the C content of steel of the present invention should control 0.12 ~
0.18%。
The affinity of Si:Si and carbon is very weak, the not carburet in steel, but can dissolve in ferrite, generates solution strengthening and makees
With so that ferritic intensity and hardness improve, but plasticity and toughness are declined.When Si content increases, island can be promoted
Shape martensite is formed, to welding heat influence area toughness nocuousness, it is seen then that Si has certain help to intensity, but content can not be excessively high.?
In ordinary low-alloy steel, silicon can also enhance the corrosion resistance of steel under field conditions (factors), and mentioning is not the drag for enhancing local corrosion.This
The Si content control of invention steel can be met the requirements in 0.10% ~ 0.60% range.
The affinity of Mn:Mn and carbon is stronger, is to expand austenite phase field, refinement crystal grain and guarantee comprehensive performance and raising
The effective element of harden ability, and it does not deteriorate the deformability of steel, 1.00% Mn about can contribute 100MPa for tensile strength.
But Mn element is a kind of element being easily segregated, and when line of segragation Mn, C content reach certain proportion, produces and welded in steel
Cheng Zhonghui generates martensitic phase, this, which is met, shows very high hardness, has larger shadow to equipment anti-H 2 S stress corrosion performance
It rings.Therefore, Mn content is limited within 1.74% when designing the steel.In view of the strength range of steel of the present invention, therefore by Mn
Control is 1.10% ~ 1.74%.
Ni:Ni not will form carbide, be expand γ phase, refinement crystal grain, spheroidized carbide and guarantee comprehensive performance and
Improve the effective element of harden ability, can fining ferrite grains improve the low-temperature flexibility of steel, hence it is evident that reduce steel plate and welding connect
The low temperature ductile-brittle transition temperature of head.But working as Ni content should not be too high, not only will increase steel-making cost, more mainly will cause oxygen
Change iron sheet to be difficult to fall off.As the increase corrosion resistance of Ni content is also gradually increased.Therefore, steel of the present invention sets Ni content
0.10% ~ 0.30%.
V:V is to effectively improve one of carbide former of armor plate strength, and the effect in steel is only second to Nb, Ti.Steel
V(CN will be formed after middle addition V), improve fusing point, hardness and the wearability of cementite.Therefore, the content of V cannot be excessively high, with
Exempt from the welding performance of reduction steel.Meanwhile in medium temperature dispersion-strengtherning occurs for V, it is helpful to thick steel plate center portion intensity.In normalized steel
In, V is often added with Ti etc. together, by adding Ti to achieve the effect that refine crystal grain, and separates out increase by force at point by V
Degree.V can make the intensity of steel increase 150MPa or more.But when V content is excessively high, precipitate quantity increases, and size increases, so as to cause
The toughness of steel reduces.V is controlled 0.32% ~ 0.55% when design.
Ti:Ti is a kind of strong carbide and nitride forming element, it can significantly improve steel room temperature intensity and
Elevated temperature strength since Ti can play a part of to refine crystal grain, therefore can also improve the toughness of steel.Suitable Ti can improve the tough of metal
Property, but excessive Ti can be formed in steel again and is mingled with.Steel can be improved in high temperature and pressure hydrogen as carbide in Ti
Stability in gas.Consider that the Ti of addition 0.008~0.020% is more closed from the toughness for improving metal in low-alloy high-strength steel
It is suitable.
N: in general, N plays the role of solution strengthening and improves harden ability, but not significant.Since nitride is on crystal boundary
It is precipitated, crystal boundary elevated temperature strength can be improved, increase the creep strength of steel.With other elements chemical combination in steel, there is precipitation-hardening effect,
N is remained in mild steel will lead to aged brittleness.Therefore in order to reduce the initial aging stage of N, by N content control 0.009 ~
0.025%。
(2) influence of impurity element and gas to plate property
In order to which the low-temperature flexibility for improving steel plate is horizontal, the impurity element in steel requires few as far as possible.
P solution strengthening and flow harden effect in steel is strong, is added in low-alloy structural steel, can improve as alloying element
The atmospheric corrosion resistance of its intensity and steel, but reduce its cold stamping performance.P can cause the red crisp (heat of steel in addition to being formed in steel
It is crisp) and plasticity reduce meltable eutectic field trash outside, also to hydrogen atom reconfigure process rise inhibiting effect so that steel hydrogenation imitate
Fruit increases, to can also reduce steel in stability acid, in sulfide hydrogen medium.Phosphorus is dissolved in ferrite, although can improve
The intensity and hardness of steel, maximum harm are that segregation is serious, reduce acid corrosion-resistant performance and plasticity, toughness.Phosphorus is to weldability
There is adverse effect.Phosphorus is harmful element in invention steel, should strictly be controlled.
S is harmful to the stress corrosion cracking stability of steel.With the increase of sulfur content, the stability of steel sharply deteriorates.Sulphur
Compound field trash is the accumulation point of hydrogen, and metal is made to form defective tissue.Meanwhile sulphur is also the promotor for adsorbing hydrogen.Therefore,
The steel should be controlled P within 0.013%, S is controlled within 0.004%.
2, the reasons why production technology is set
(1) process for making
In alloys such as Converter addition Nb, Ni when the steel smelting, it is ensured that alloy is sufficiently uniformly dissolved, and is added in LF furnace and RH furnace
Al line, at the same in strict control molten steel N content.It vacuum time setting (vacuum processing time is not less than 15min) when smelting, can
It is preferable to reduce impurity, gas content in steel.Mn content, alloying element type are more in steel, and electromagnetic agitation must be carried out before continuous casting
With dynamic soft-reduction processing, element segregation is reduced.Necessary slow cooling, avoids high-temperature embrittlement region after slab cutting, prevents disconnected base.
(2) steel rolling process
The steel is rolled by low-alloy steel technique.Roll before slab heating temperature be 1220 ~ 1260 DEG C, the rate of heat addition be 8 ~
12min/cm, it is ensured that the uniform steel of slab temperature.When roughing, according to finished steel plate thickness, control among at the end of this stage rolling
The thickness of base.When finish rolling, after temperature avoids austenite fraction recrystallization zone temperature, starts the control of austenite Unhydrated cement and roll
System.At this point, the rolling of Unhydrated cement has enough compression ratios, so that the deformation accumulation of high distortion is generated in deformed austenite,
Form a large amount of deformation bands and high density dislocation.After finish rolling finish to gauge, reply and polygonization will occur for deformation dislocation, thus refinement group
It knits, improves the intensity and toughness of steel plate.When rolling, to consider the critical point temperature of steel, avoid the occurrence of mixed crystal phenomenon.Therefore comprehensive
Consider, the roughing start rolling temperature of steel is not less than 1100 DEG C, and roughing finishing temperature is not less than 1000 DEG C, and finish rolling start rolling temperature is not more than
970 DEG C, finish rolling rolls 820 DEG C ~ 900 DEG C of finishing temperature.
(3) heat treatment process
Since the steel will be used for a long time under cryogenic media, and it is more demanding to the low-temperature flexibility of steel, so being directed to the spy of the steel
Point design heat treatment process is normalizing.The tissue of the steel is a kind of more stable ferrite+pearlitic structrure after normalizing, in steel not
It will appear the martensitic structure for having larger impact to low-temperature flexibility.Normalizing temperature is designed as 850 ~ 920 DEG C, is to make steel abundant
Austenitizing obtains stable tissue.
The present invention has the advantage that 1, in terms of composition design using low-carbon and low-alloy, addition one compared with prior art
Quantitative Mn, Ni, Nb, V, Ti etc., strict control P, S content, so that the steel has excellent low-temperature flexibility and welding performance.Benefit
It is heat-treated to obtain stable ferrite+pearlitic structrure with normalizing, utilizes the complex intensifying of the microalloys such as Ni, Nb, V, Ti in steel
Effect ensure that steel obtain enough intensity and toughness；2, after by ingredient design, Control and Inclusion Removal, rolling and heat treatment,
Good obdurability, low yield strength ratio and welding performance, yield strength >=430MPa are obtained, 600 ~ 720MPa of tensile strength prolongs
Rate >=20% is stretched, lateral -50 DEG C of KV2 >=60J of steel plate can be used for manufacturing the mobile containers of all kinds of large-scale low-temperatures；3, it is designed by ingredient
With corresponding production technology, excellent corrosion resistance is obtained, resistance against hydrogen cracking performance (HIC) crack length rate CLR, crackle are thick
Degree rate CTR, crack-sensitivity rate CSR are all satisfied I grade of requirement, H2S stress corrosion performance minimum load and minimum yield strength ratio
Greater than 0.80.
Detailed description of the invention
Fig. 1 is metallographic structure figure of the invention, and metallographic structure is ferrite+pearlite, and ferrite grain size is 10 grades.
Specific embodiment
Illustrate that advantages of the present invention, the present invention list 8 embodiments in order to clearer, and provides 3 comparative examples
Compare and analyze, referring to 3 ~ table of table 7, in which: table 3 be 8 embodiments enumerating of the present invention and 3 comparative examples chemistry at
Point, table 4 is heating, rolling mill practice and the heat treatment process parameter of the embodiment of the present invention and comparative example, and table 5 is the embodiment of the present invention
With the mechanics properties testing data of comparative example, table 6 is the hydrogen sulfide corrosion resistant inspection data of the embodiment of the present invention and comparative example；Table
7 be the field trash detection data of the embodiment of the present invention and comparative example；
Embodiment 1
It with steel plate thickness is 10mm, chemical component composition and matter that the present embodiment, which is a kind of high performance corrosion-proof moving pressure container,
It is as follows to measure percentage composition: C:0.125%, Si:0.45%, Mn:1.55%, P:0.012%, S:0.003%, Ni:0.25%, V:
0.035%, Nb:0.045%, Ti:0.012%, N:0.01%, remaining is Fe and is inevitably mingled with.
The mechanical property of steel plate described in the present embodiment: yield strength 451MPa, tensile strength 620MPa, elongation percentage 29%, steel
Laterally -50 DEG C of KV2 reach 176J to plate.
The metallographic structure of steel plate described in the present embodiment is based on ferrite and pearlite.
The manufacturing method of steel plate described in the present embodiment is the following steps are included: desulfurizing iron processing → converter top and bottom blowing → LF
Refining → RH furnace vacuum processing → slab slow cooling → rolling → section cooling → normalizing → inspection；
The technological parameter that wherein RH furnace is vacuum-treated is as follows: vacuum time 25min, while nitrogen pick-up and control nitrogen, Si- in vacuum process
Ca processing, carries out electromagnetic agitation before continuous casting, and when continuous casting carries out dynamic soft-reduction processing；
Wherein roll and cooling by the progress of high-strength steel technique: slab heating temperature is 1220 DEG C before rolling, slab heating time
200min, rate of heat addition 8min/cm, the roughing start rolling temperature of steel are 1100 DEG C, 1020 DEG C of roughing finishing temperature, finish rolling open rolling
970 DEG C of temperature, finish rolling finishing temperature is 900 DEG C, steel plate 750 DEG C of red temperature after cooling；
Wherein the technological parameter of normalizing is as follows: heating temperature is 850 DEG C, soaking time 40min, cooling using air-cooled mode.
In rolling mill practice described in the present embodiment, roughing reduction in pass is greater than 25mm, three percentage pass reductions 35% of finish rolling end.
The hydrogen sulfide corrosion resistant testing result of steel plate described in the present embodiment is referring to table 6, and field trash testing result is referring to table
7。
See Table 3 for details for the steel plate finished product thickness and chemical component of embodiment 2-8, heating, rolling and heat treatment process in production
See Table 4 for details for parameter, and see Table 5 for details for mechanics properties testing result, and see Table 6 for details for hydrogen sulfide corrosion resistant testing result, field trash
See Table 7 for details for testing result.
From 5 ~ table of table 7 as can be seen that the embodiment of the present invention mechanical property and comparative example be not much different (yield strength >=
430MPa, tensile strength reach 600 ~ 720MPa), while compared to comparison and there is higher toughness (- 50 DEG C of KV2 >=60J),
Acidresistant property is more excellent: resistance against hydrogen cracking performance (HIC) the crack length rate CLR of the embodiment of the present invention, crack thickness rate
CTR, crack-sensitivity rate CSR are all satisfied I grade of requirement, and H2S stress corrosion performance minimum load is greater than with minimum yield strength ratio
0.80；Field trash grade is total simultaneously is not more than 1.0, is able to satisfy the requirement of manufacture moving pressure container equipment completely.
Claims (5)
1. a kind of high performance corrosion-proof moving pressure container steel plate, it is characterized in that: steel plate chemical component composition and quality
Percentage composition is as follows: C:0.12~0.18%, Si:0.10~0.60%, Mn:1.10~1.74%, P≤0.013%, S≤0.004%,
Ni:0.10~0.30%, V:0.032~0.055%, Nb :≤0.06%, Ti:0.008~0.020%, N:0.009 ~ 0.025%, together
When meet: Ti/N≤4.0, Nb+V+Ti≤0.11%；Remaining is Fe and is inevitably mingled with.
2. a kind of high performance corrosion-proof moving pressure container steel plate according to claim 1, it is characterized in that: the steel plate
Mechanical property: yield strength >=430MPa, 600 ~ 720MPa of tensile strength, elongation percentage >=20%, steel plate laterally -50 DEG C of KV2 >=
60J。
3. a kind of high performance corrosion-proof moving pressure container steel plate according to claim 1, it is characterized in that: the steel plate
Metallographic structure based on ferrite and pearlite.
4. a kind of a kind of manufacture of high performance corrosion-proof moving pressure container steel plates described in any item according to claim 1 ~ 3
Method, it is characterized in that: the following steps are included: desulfurizing iron processing → converter top and bottom blowing → LF refining → RH furnace is vacuum-treated →
Slab slow cooling → rolling → section cooling → normalizing → inspection；
The technological parameter that wherein RH furnace is vacuum-treated is as follows: vacuum time is no less than 18min, while nitrogen pick-up and control nitrogen, vacuum mistake
Si-Ca is handled in journey, carries out electromagnetic agitation before continuous casting, and when continuous casting carries out dynamic soft-reduction processing；
Wherein roll and cooling by the progress of high-strength steel technique: slab heating temperature is 1220 ~ 1260 DEG C before rolling, and the rate of heat addition is
8 ~ 12min/cm, the roughing start rolling temperature of steel are >=1100 DEG C, roughing finishing temperature >=1000 DEG C, finish rolling start rolling temperature≤970
DEG C, finish rolling finishing temperature is 820 ~ 900 DEG C, steel plate 600 ~ 750 DEG C of red temperature after cooling；
Wherein the technological parameter of normalizing is as follows: heating temperature is 850 ~ 920 DEG C, 40 ~ 60min of soaking time, using air-cooled mode
It is cooling.
5. a kind of manufacturing method of high performance corrosion-proof moving pressure container steel plate according to claim 4, feature
Be: in the rolling mill practice, roughing reduction in pass is greater than 25mm, and three percentage pass reductions of finish rolling end are greater than 30%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110387503A (en) * | 2019-07-23 | 2019-10-29 | 舞阳钢铁有限责任公司 | A kind of low-alloy SA622GrB steel plate and production method |
| CN111748743A (en) * | 2020-06-30 | 2020-10-09 | 武汉钢铁有限公司 | Corrosion-resistant steel for railway tank wagon and production method thereof |
| CN111893390A (en) * | 2020-08-12 | 2020-11-06 | 宝武集团鄂城钢铁有限公司 | Method for producing steel sheet for wide-width railway vehicle tank body with uniform performance |
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| JP2015124442A (en) * | 2013-12-25 | 2015-07-06 | ポスコ | Steel material for pressure vessel excellent in low temperature toughness and hydrogen sulfide stress corrosion cracking resistance, method for producing the same, and method for producing deep-drawn product therefrom |
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| CN111748743A (en) * | 2020-06-30 | 2020-10-09 | 武汉钢铁有限公司 | Corrosion-resistant steel for railway tank wagon and production method thereof |
| CN111893390A (en) * | 2020-08-12 | 2020-11-06 | 宝武集团鄂城钢铁有限公司 | Method for producing steel sheet for wide-width railway vehicle tank body with uniform performance |
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