CN107805756A - A kind of cryogenic steel, low-temperature pressure container and steel for pipe pipe and preparation method thereof - Google Patents
A kind of cryogenic steel, low-temperature pressure container and steel for pipe pipe and preparation method thereof Download PDFInfo
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- CN107805756A CN107805756A CN201610815320.1A CN201610815320A CN107805756A CN 107805756 A CN107805756 A CN 107805756A CN 201610815320 A CN201610815320 A CN 201610815320A CN 107805756 A CN107805756 A CN 107805756A
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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
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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Abstract
The invention provides a kind of cryogenic steel, low-temperature pressure container and steel for pipe pipe and preparation method thereof, and on the basis of the weight of the cryogenic steel, the steel contains the following chemical composition of percentage:C:0.09~0.16%, Si:0.15~0.50%, Mn:0.85~1.70%, S:≤ 0.010%, P:≤ 0.020%, Ni:0.30~0.86%, Nb:≤ 0.05%, Cu:≤ 0.30%, V:≤ 0.05%, Als:0.015~0.080%, [N]≤70ppm, [O]≤30ppm, [H]≤2ppm, remaining is Fe and inevitable impurity, wherein, the content of each component is not 0.The low-temperature pressure container and steel for pipe pipe resistance to low temperature prepared using above-mentioned cryogenic steel is good:There is higher toughness, impact absorbing energy KV2 >=65J of steel pipe in 60 DEG C of (containing) temperatures above.
Description
Technical field
The present invention relates to the pressure vessel of the applications such as petrochemical industry, coal chemical industry and pressure pipeline field, and in particular to a kind of
Cryogenic steel, low-temperature pressure container and steel for pipe pipe and preparation method thereof.
Background technology
As the country is increasing to the demand of clean energy resource, the device of oil refining, chemical industry, coal chemical industry, coal gas and LNG
Largely start.In these devices, pressure vessel, heat exchanger and pressure pipeline account for more than the 60% of total equipment investment, therefore, above-mentioned
Each part prepares basic demand of the material except meeting its application, it should also be taken into account that its economy.In addition, such device is general
A feature all be present:Worst cold case.In order to tackle this environment, developed both at home and abroad -40 DEG C, -45 DEG C, -50 DEG C, -
The low temperature low alloy steel of 70 DEG C, -100 DEG C ranks, but lack the steel pipe of -60 DEG C of ranks only, this is to engineering design, system
Make, purchase and construction is made troubles.There are problems that excessively using sometimes, as -60 DEG C of ranks can be selected originally, but must not
- 70 DEG C of ranks are not selected, cause unnecessary waste.
Patent document CN104651717A discloses a kind of seamless pipeline steel tube of X80 steel-grade low temperature containing rare earth, from X80
It is the pipe line steel for oil gas long-distance transmissions that this trade mark, which can be seen that the patent, is to improve low temperature properties by adding rare earth
The high tensile pipeline steel of energy, it is well known that after quenching raising intensity, improving cryogenic property is difficult, if the invention does not add
Add rare earth, intensity improved using quenching again, phosphorus content is again so high, want to reach -60 DEG C of so high ballistic works not may,
And in order to reach -60 DEG C of impact flexibility requirements, using normalizing process, intensity rank can not possibly then reach X80 ranks.Rare earth metal
Use although solve above mentioned problem, but its price is relatively expensive so that cost of investment increase.
Ni systems steel is the Steel material that current this area is widely used in low temperature, and this kind of tube material is improved by adding Ni
Low-temperature flexibility, but it still suffers from the problems such as low temperature intensity is low, and toughness and plasticity can not get both, expensive.Therefore, it is necessary to open
Send out the cryogenic steel based on Ni systems steel a kind of.
The content of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of cryogenic steel, low-temperature pressure to hold
Device and steel for pipe pipe and preparation method thereof.The low-temperature pressure container that is prepared by the cryogenic steel and steel for pipe pipe it is resistance to low
Temperature is functional:There is higher toughness in -60 DEG C of temperatures above.
According to the first aspect of the invention, it is described on the basis of the weight of the steel the invention provides a kind of cryogenic steel
Steel contains the following chemical composition of percentage:C:0.09~0.16%, Si:0.15~0.50%, Mn:0.85~
1.70%, S:≤ 0.010%, P:≤ 0.020%, Ni:0.30~0.86%, Nb:≤ 0.05%, Cu:≤ 0.30%, V:≤
0.05%, Als:0.015~0.080%, [N]≤60ppm, [O]≤20ppm, [H]≤2ppm, remaining is for Fe and unavoidably
Impurity, wherein, the content of each component is not 0.
According to the second aspect of the invention, the invention provides a kind of low temperature prepared using cryogenic steel as described above
Pressure vessels and pipes steel pipe, the prior austenite grain size of the steel pipe is 6 grades or thinner.
According to the third aspect of the invention we, the invention provides the system of a kind of low-temperature pressure container and steel for pipe pipe
Preparation Method, this method comprise the following steps:
1) refining of steel:Raw material is smelted, then carries out external refining, finally carries out application of vacuum;
2) steel pipe forming:Pipe is manufactured by continuous casting or the method for molding, then is molded using rolling;
3) it is heat-treated:The condition of delivery of shaping steel tube is normalizing or normalizing+tempering.
Mechanical property using steel pipe made from the cryogenic steel of the present invention includes:Wherein, room-temperature mechanical property includes:Bend
Intensity >=415MPa is taken, tensile strength is 550~630MPa, Longitudinal extending rate A50mm>=36%.When the diameter of phi of the steel pipe
>=76mm, and during wall thickness >=14mm, impact absorbing energy KV2 >=65J of the steel pipe at -60 DEG C.The low temperature pressure of the present invention
Force container and steel for pipe pipe have higher toughness in -60 DEG C of temperatures above.
Embodiment
To make the present invention easier to understand, the present invention is described in detail below in conjunction with embodiment, these embodiments are only
Serve illustrative, be not intended to limit the invention.
According to the first aspect of the invention, it is described on the basis of the weight of the steel the invention provides a kind of cryogenic steel
Steel contains the following chemical composition of percentage:C:0.09~0.16%, Si:0.15~0.50%, Mn:0.85~
1.70%, S:≤ 0.010%, P:≤ 0.020%, Ni:0.30~0.86%, Nb:≤ 0.05%, Cu:≤ 0.30%, V:≤
0.05%, Als:0.015~0.080%, [N]≤60ppm, [O]≤20ppm, [H]≤2ppm, remaining is for Fe and unavoidably
Impurity, wherein, the content of each component is not 0.
Preferably, cryogenic steel of the invention, on the basis of the weight of the steel, the steel contains percentage
Following chemical composition:C:0.10~0.15%, Si:0.15~0.45%, Mn:1.05~1.58%, S:≤ 0.009%, P:≤
0.016%, Ni:0.42~0.76%, Nb:≤ 0.04%, Cu:≤ 0.28%, V:≤ 0.03%, Als:0.018~
0.065%, [N]≤50ppm, [O]≤15ppm, [H]≤1.5ppm, remaining is Fe and inevitable impurity, wherein, each group
The content divided is not 0.
According to the present invention, the effect of main chemical compositions is as follows in the cryogenic steel:
C:Carbon can be dissolved by gap and improve hardness of steel, be the maximally effective element of reinforced structure steel, and be also most to pass through
The element of Ji, but carbon has detrimental effect to toughness, plasticity, weldability etc., therefore the obdurability based on steel, weldability etc. are each
The matching of performance, while in order to reduce the wall thickness of pressure vessel and pressure pipeline as far as possible, C of the invention content control exists
Between 0.09wt%~0.16wt%, preferably C content is 0.10wt%~0.15wt%.
Si:Silicon plays deoxidation in steel, also there is certain solid solution strengthening effect, silicon in addition to it can suppress manganese segregation,
The Grain Boundary Segregation of phosphorus can also be suppressed, but silicone content is too high in steel steel fragility is occurred, in order to ensure toughness, Si of the invention
Content control between 0.15wt%~0.50wt%, preferably Si content is 0.15wt%~0.45wt%.
Mn:Manganese is among the austenite stabilizing elements, while is also matrix strengthening element, can be improved by precipitation strength strong
Degree, manganese can also improve the quenching degree of material, too low, and intensity does not reach requirement, the too high toughness for then influenceing material, and silicon
It is present in certain proportion in steel with manganese, also helps suppression segregation each other, therefore, Mn content is controlled in 0.85wt%
In the range of~1.70wt%, preferably Mn content is 1.05wt%~1.58wt%.
S、P:Belong to impurity element in steel, content should be reduced as far as possible.Sulphur easily forms precipitate sulphur with metallic element manganese
Change manganese, reduce low-temperature flexibility, S contents are controlled in below 0.010wt%, preferably S content≤0.009wt%;Phosphorus is easily in crystalline substance
Boundary's segregation, crystal boundary resistance to crack extension ability is reduced, reduce low-temperature flexibility, P content is controlled in below 0.020wt%, preferably P
Content≤0.016wt%.
Ni:Nickel is non-carbide former, the effect of solution strengthening is primarily served in steel, especially to material low
Stability under temperature is most important, is reduction ductile-brittle transition temperature element best in metallic element, is advantageous to improve material
Quenching degree and intensity, while the cold plasticity of material can also be improved, for economics, it is by Ni content control
0.30wt%~0.86wt%, preferably Ni content are 0.42wt%~0.76wt%.
Nb:The carboritride strain induced precipitate of niobium plays precipitation enhancement, while prevents brilliant in hot procedure
Grain is grown up.If its content is higher, continuous casting steel billet easily splits, and influences the lumber recovery of steel pipe, present invention control Nb content≤
0.05wt%, preferably Nb content≤0.04wt%.
Cu:Copper with stable austenite, can significantly improve the activity of carbon, promote the precipitation of alloy carbide, so as to
The effect of refinement transformation tissue and precipitation strength is waved in sending and receiving, by the control of Cu content in the range of≤0.30wt%, preferably Cu
Content≤0.28wt%.
V:Vanadium dramatically increases the reheat cracking susceptibility of forging steel pipe, while the reciprocation between the niobium in steel, plays
The effect of niobium vanadium complex intensifying, so as to compensate for the decline situation of the steel strength caused by carbon content decline in steel, limit V
Content≤0.05wt%, preferably V content≤0.03wt%.
Als:Dissolved aluminum has the function that crystal grain thinning, in order to reduce the oxygen content in steel in steel-smelting production process, commonly uses
The deoxidation materials such as aluminium, barium, calcium, silicon, manganese (or its composite alloy) react into oxide clinker with oxygen and float to molten steel upper strata
And the oxygen content in steel is reduced, wherein aluminium is excellent deoxidier, and aluminium easily reacts generation Al with oxygen2O3(very small amount aluminium nitride), together
When there is part pure aluminum to dissolve in steel, this part pure aluminum can by acid dissolving be referred to as dissolved aluminum, the present invention control Als content exist
Within the scope of 0.015wt%~0.080wt%, preferably Als content is 0.018wt%~0.065wt%.
[N]、[O]、[H]:Nitrogen, oxygen and aluminium easily form high-melting-point precipitate aluminium nitride and aluminum oxide, and precipitate is straight
Footpath is larger, easily causes stress concentration near precipitate and turns into formation of crack, has a strong impact on the low-temperature flexibility of matrix, the present invention
Content≤the 60ppm, preferably [N] of control [N] content≤50ppm, the preferably content≤20ppm of [O], the content of [O]≤
15ppm, the content of hydrogen also should be controlled strictly, be allowed to be in alap level, and the content of present invention control [H]≤
2ppm, preferably [H] content≤1.5ppm.
, according to the invention it is preferred to each component in scope can further improve the steel pipe prepared using cryogenic steel in room
Yield strength, tensile strength and Longitudinal extending rate under temperature;And impact absorbing energy of the steel pipe at -60 DEG C.
According to the present invention, A classes, B classes, C classes, D classes and DS type impurities that the steel contains generally are not more than 0.5 grade;
Wherein, thick, the thin serial sum of A classes, B classes, C classes and D type impurities is generally not more than 1.5 grades.
Wherein, the concept of A classes, B classes, C classes, D classes and DS type impurities is known to those skilled in the art.Refer specifically to
It is:A classes are sulfide, and B classes are aluminum oxide, and C classes are silicate, and D classes are spherical oxide, and DS classes are that individual particle is spherical.
According to the second aspect of the invention, the invention provides low-temperature pressure prepared by the cryogenic steel described in a kind of use
Container and steel for pipe pipe, the prior austenite grain size of the steel pipe can be 6 grades or thinner.
According to the low-temperature pressure container and steel for pipe pipe of the present invention, the room-temperature mechanical property of the steel pipe includes:Surrender
Intensity (Rel)≥415MPa;Tensile strength (Rm) it is 550~630MPa;Longitudinal extending rate A50mm>=36% (gauge length 50mm).
According to the present invention, as diameter of phi >=76mm of the steel pipe, and during wall thickness >=14mm, the steel pipe carries out Charpy (V
Type breach) impact test when, impact absorbing energy KV2 >=65J of the steel pipe at -60 DEG C.
According to the third aspect of the invention we, the invention provides the system of a kind of low-temperature pressure container and steel for pipe pipe
Preparation Method, this method comprise the following steps:
1) refining of steel:Raw material is smelted, then carries out external refining, finally carries out application of vacuum;
2) steel pipe forming:Pipe is manufactured by continuous casting or the method for molding, then is molded using rolling;
3) it is heat-treated:The condition of delivery of shaping steel tube is normalizing or normalizing+tempering.
Normally, in step 1), the raw material can use electric arc furnaces or oxygen coverter to be smelted, with specific reference to raw material
Species select.
In step 2), the rolling can be hot rolling (expansion) or cold rolling (pulling out).
In step 3), the temperature of the normalizing can be 890~940 DEG C, and the temperature of tempering can be 580~640 DEG C.
External refining and application of vacuum of the present invention can be carried out by this area common process and equipment.
The present invention will be described in detail by way of examples below.
Embodiment 1
A kind of low-temperature pressure container and steel for pipe pipe, specification are Φ 273 × 13, the preparation method of the steel pipe include with
Lower step:
1) refining of steel:Raw material is smelted using electric arc furnaces, then carries out LF external refinings, finally carries out VD vacuum and takes off
Gas, the chemical composition of obtained steel are as shown in table 1;
2) steel pipe forming:Pipe is manufactured by continuous casting process first, then is molded using hot rolling (expansion);
3) it is heat-treated:The condition of delivery of shaping steel tube is normalizing+tempering, and the phase transition temperature Ac1 of steel pipe is 690 after measured
DEG C, Ac3 is 864 DEG C, and Ar1 is 580 DEG C, and Ar3 is 785 DEG C, and normalizing temperature selects 890 DEG C, and temperature selects 630 DEG C.
Embodiment 2
Embodiment with embodiment 1, wherein, the chemical composition of obtained steel is as shown in table 1, normalizing temperature select 910 DEG C,
Temperature selects 615 DEG C.
Embodiment 3
Embodiment with embodiment 1, wherein, the chemical composition of obtained steel is as shown in table 1, normalizing temperature select 930 DEG C,
Temperature selects 590 DEG C.
Embodiment 4
Embodiment with embodiment 1, wherein, the chemical composition of obtained steel is as shown in table 1, and the condition of delivery is normalizing, just
Fiery temperature selects 890 DEG C.
Comparative example 1
Embodiment is with embodiment 1, and difference is, the chemical composition of obtained steel is as shown in table 1.
Comparative example 2
Embodiment is with embodiment 1, and difference is, the chemical composition of obtained steel is as shown in table 1.
The chemical composition of steel for steel pipes is as shown in table 1 made from above-described embodiment and comparative example.
Table 1
Embodiment and the room-temperature mechanical property of steel pipe and prior austenite grain size made from comparative example are as shown in table 2.
Table 2
* tensile sample is longitudinal direction.
Chemical composition, room-temperature mechanical property and the grain size number evidence of steel pipe obtained by embodiment in Tables 1 and 2 and comparative example
Understanding, the steel pipe prepared using the cryogenic steel of the present invention has >=415MPa a yield strength, >=564MPa tensile strength,
>=36% room temperature elongation percentage, is superior to comparative example.
The prior austenite grain size that method according to GB/T6394 determines embodiment steel pipe is 6.5 grades or thinner.
In addition, measure inclusion content in each steel pipe according to B methods in GB/T10561, wherein, A classes, B classes, C classes, D classes and
DS type impurities are no more than 0.5 grade;Wherein, thick, the thin serial sum of A classes, B classes, C classes and D type impurities is no more than 1.0
Level.
Carry out Charpy (v-notch) Impulse Test Result for the steel pipe that embodiment is prepared with comparative example is as shown in table 3.
Table 3
* impact specimen is laterally, shown KV2 values is the average value of three samples.
As shown in Table 3, steel pipe of the invention has higher toughness under cryogenic, disclosure satisfy that the need of practical application
Will, at -60 DEG C, impact absorbing energy KV2 >=65J of steel pipe of the invention.
It is described above embodiments of the invention, described above is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.In the case of the scope and spirit without departing from illustrated embodiment, for the art
Many modifications and changes will be apparent from for those of ordinary skill.
Claims (10)
- A kind of 1. cryogenic steel, it is characterised in that on the basis of the weight of the steel, the steel contain percentage with Lower chemical composition:C:0.09~0.16%, Si:0.15~0.50%, Mn:0.85~1.70%, S:≤ 0.010%, P:≤ 0.020%, Ni:0.30~0.86%, Nb:≤ 0.05%, Cu:≤ 0.30%, V:≤ 0.05%, Als:0.015~ 0.080%, [N]≤60ppm, [O]≤20ppm, [H]≤2ppm, remaining is Fe and inevitable impurity, wherein, each component Content be 0.
- 2. cryogenic steel as claimed in claim 1, wherein, on the basis of the weight of the steel, the steel contains percentage by weight The following chemical composition of number meter:C:0.10~0.15%, Si:0.15~0.45%, Mn:1.05~1.58%, S:≤ 0.009%, P:≤ 0.016%, Ni:0.42~0.76%, Nb:≤ 0.04%, Cu:≤ 0.28%, V:≤ 0.03%, Als: 0.018~0.065%, [N]≤50ppm, [O]≤15ppm, [H]≤1.5ppm, remaining is Fe and inevitable impurity, its In, the content of each component is not 0.
- 3. cryogenic steel as claimed in claim 1 or 2, wherein, A classes, B classes, C classes, D classes and the DS classes that the steel contains are mingled with Thing is no more than 0.5 grade;Wherein, thick, the thin serial sum of A classes, B classes, C classes and D type impurities is no more than 1.5 grades.
- 4. low-temperature pressure container and pipeline prepared by a kind of cryogenic steel using as described in any one in claims 1 to 3 With steel pipe, it is characterised in that the prior austenite grain size of the steel pipe is 6 grades or thinner.
- 5. low-temperature pressure container as claimed in claim 4 and steel for pipe pipe, wherein, the room-temperature mechanical property bag of the steel pipe Include:Yield strength >=415MPa;Tensile strength is 550~630MPa;Longitudinal extending rate A50mm>=36%.
- 6. low-temperature pressure container as claimed in claim 4 and steel for pipe pipe, wherein, when the steel pipe diameter of phi >= 76mm, and during wall thickness >=14mm, impact absorbing energy KV2 >=65J of the steel pipe at -60 DEG C.
- 7. the preparation method of the low-temperature pressure container and steel for pipe pipe in a kind of claim 4~6 described in any one, it is special Sign is that this method comprises the following steps:1) refining of steel:Raw material is smelted, then carries out external refining, finally carries out application of vacuum;2) steel pipe forming:Pipe is manufactured by continuous casting or the method for molding, then is molded using rolling;3) it is heat-treated:The condition of delivery of shaping steel tube is normalizing or normalizing+tempering.
- 8. the preparation method of low-temperature pressure container as claimed in claim 7 and steel for pipe pipe, wherein, it is described in step 1) Raw material is smelted using electric arc furnaces or oxygen coverter.
- 9. the preparation method of low-temperature pressure container as claimed in claim 7 and steel for pipe pipe, wherein, it is described in step 2) Rolling is hot rolling or cold rolling.
- 10. the preparation method of low-temperature pressure container as claimed in claim 7 and steel for pipe pipe, wherein, it is described in step 3) The temperature of normalizing is 890~940 DEG C, and the temperature of tempering is 580~640 DEG C.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110592462A (en) * | 2019-09-19 | 2019-12-20 | 舞阳钢铁有限责任公司 | Steel plate for low-temperature equipment and production method thereof |
CN113061811A (en) * | 2021-03-17 | 2021-07-02 | 攀钢集团江油长城特殊钢有限公司 | LNG (liquefied Natural gas) marine structural steel and preparation method thereof |
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CN101871077A (en) * | 2010-06-08 | 2010-10-27 | 武汉钢铁(集团)公司 | Normalizing type high-strength pressure vessel steel and manufacturing method thereof |
CN104561772A (en) * | 2014-12-26 | 2015-04-29 | 南阳汉冶特钢有限公司 | Ultralow-temperature steel plate with thickness of 130-150 mm and production method for ultralow-temperature steel plate |
CN104726787A (en) * | 2013-12-23 | 2015-06-24 | 鞍钢股份有限公司 | High-strength pressure vessel thick plate with good low-temperature toughness and production method |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN101300365A (en) * | 2005-09-29 | 2008-11-05 | 海德尔有限责任公司 | Methods for heat treating thick-walled forgings |
CN101871077A (en) * | 2010-06-08 | 2010-10-27 | 武汉钢铁(集团)公司 | Normalizing type high-strength pressure vessel steel and manufacturing method thereof |
CN104726787A (en) * | 2013-12-23 | 2015-06-24 | 鞍钢股份有限公司 | High-strength pressure vessel thick plate with good low-temperature toughness and production method |
CN104561772A (en) * | 2014-12-26 | 2015-04-29 | 南阳汉冶特钢有限公司 | Ultralow-temperature steel plate with thickness of 130-150 mm and production method for ultralow-temperature steel plate |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110592462A (en) * | 2019-09-19 | 2019-12-20 | 舞阳钢铁有限责任公司 | Steel plate for low-temperature equipment and production method thereof |
CN110592462B (en) * | 2019-09-19 | 2021-04-06 | 舞阳钢铁有限责任公司 | Steel plate for low-temperature equipment and production method thereof |
CN113061811A (en) * | 2021-03-17 | 2021-07-02 | 攀钢集团江油长城特殊钢有限公司 | LNG (liquefied Natural gas) marine structural steel and preparation method thereof |
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