CN110055472A - A kind of big thickness low-temperature impact tank plate of overlength and its production method - Google Patents
A kind of big thickness low-temperature impact tank plate of overlength and its production method Download PDFInfo
- Publication number
- CN110055472A CN110055472A CN201910343608.7A CN201910343608A CN110055472A CN 110055472 A CN110055472 A CN 110055472A CN 201910343608 A CN201910343608 A CN 201910343608A CN 110055472 A CN110055472 A CN 110055472A
- Authority
- CN
- China
- Prior art keywords
- temperature
- steel
- overlength
- temperature impact
- big thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- 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
- C21D8/0226—Hot rolling
-
- 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
-
- 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
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of big thickness low-temperature impact tank plate of overlength and its production methods, the steel plate chemical component composition and its mass percentage are as follows: C:0.10-0.13%, Si:0.20-0.30%, Mn:0.40-0.60%, P≤0.006%, S≤0.003%, Cr:0.90-1.10%, Ni:0.15-0.20%, Mo:0.45-0.60%, Al:0.020-0.045%, surplus are Fe and inevitable impurity；The production method includes steel-making, heating, rolling, heat treatment procedure.The present invention ensure that purity of steel height, performance is uniform end to end for steel plate, and gained steel plate fully meets steels for pressure vessel use requirement, and the manufacture of pressure vessel is suitble to use by accurately being controlled steel-making ingredient and process.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of big thickness low-temperature impact tank plate of overlength and its production
Method.
Background technique
15CrMoR steel is high temperature steels for pressure vessel use, due to being added while Cr, Mo element, so that steel plate is with good
Good high-temperature behavior and thermostrength, is widely used in pressure vessel and composite plate substrate uses.
Traditional production method wants this hardness of steel and impact property although can achieve in GB/T713-2014 standard
It asks, but with the raising of pressure vessel design standards, the performance requirement of steel plate is gradually increased, while the thickness and length of steel plate
Increase, while more stringent requirements are proposed for the stability of the uniformity and impact flexibility to steel plate head, tail performance.
For overlength steel plate, the stable production difficult point of performance is end to end: head and tail temperature uniformity and cooling capacity exist
Certain difference, often head cooling effect is preferable, and blade trailing cooling effect is weak, in addition to technological reason, also resides in equipment limit gauge
Lattice limitation such as uses muti-piece steel loading, and the spacing among every block of steel is smaller, is bound to cause steel plate heat absorption, causes temperature to reduce, in turn
Cause the difference of steel plate microstructure and property end to end.The low-temperature impact toughness of overlength steel plate is also controlling difficulties, studies a set of stabilization
Production technology, control the tissue ratio and grain size size of steel plate, and then improve the low-temperature impact toughness of steel plate, and current
Urgent problem to be solved in industry.
In view of the above-mentioned problems, the big thickness low-temperature impact tank plate of exploitation overlength and its production method in industry, ensure that
Steel plate yield strength and the requirement of good low-temperature impact toughness, meet tankage demand, have important social benefit and warp
Ji benefit.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of big thickness low-temperature impact tank plate of overlength and its producers
Method.This method can control bainite and ferrite content in steel plate, improve the low-temperature impact toughness of overlength steel plate, and guarantee steel plate
Performance end to end it is uniform and stable.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of big thickness low-temperature impact container of overlength
Steel plate, the steel plate chemical component composition and its mass percentage are as follows: C:0.10-0.13%, Si:0.20-0.30%, Mn:
0.40-0.60%, P≤0.006%, S≤0.003%, Cr:0.90-1.10%, Ni:0.15-0.20%, Mo:0.45-0.60%, Al:
0.020-0.045%, surplus are Fe and inevitable impurity.
Steel plate thickness of the present invention is 126-135mm, length 13000-14000mm.
Steel plate head of the present invention, tail yield strength Rel >=330MPa, tensile strength Rm >=480MPa, -20 DEG C of low temperature punchings
Hit function >=70J.
Steel plate bainite content 80-90% of the present invention, ferrite content 10-20%.
The present invention also provides a kind of production method of the big thickness low-temperature impact tank plate of overlength, the production method packet
Include steel-making, heating, rolling, heat treatment procedure；The heat treatment procedure, using offline gradient normalizing+high-temperature tempering process, offline
900-930 DEG C of heating temperature of the first ladder of gradient normalizing, the second 850-880 DEG C of ladder heating temperature, is all made of water cooling, steel twice
50-100 DEG C of plate red temperature.
Steel making working procedure of the present invention, LF packets feed aluminum steel 0.9-1.1 ㎏/t steel, and whole molten steel Al control is in 0.030-
0.050%；VD vacuum process keeps 17-22min, and the big argon flow of 80-110NL/min is kept for 12-20min, vacuum later period
The small argon flow of 30-70NL/min keeps 7-12min, soft blow 15-20min, soft blow pressure 0.27-0.30MPa after vacuum.
Heating process of the present invention, steel ingot are heated in soaking pit, 1240-1260 DEG C of heating temperature, amount to heating
Time 30-40h, to temperature after come out of the stove and rolled.
Rolling process of the present invention, 1050-1100 DEG C of hot stage is using big pressure rolling, and percentage pass reduction is in 30-
40%, guarantee rolling 3-5 passage, 840-860 DEG C of finishing temperature, water cooling is carried out using ACC after rolling, controls red temperature 650-700
DEG C, guarantee good crystal grain deposit.
Heat treatment procedure of the present invention, using offline gradient normalizing+high-temperature tempering process, the high tempering is being tempered
Furnace carries out, and 710-740 DEG C of tempering temperature, in the total heating time 3-5min/mm of furnace, comes out of the stove air-cooled, obtains after tempering required
Steel plate.
Heat treatment procedure of the present invention, by the way of monolithic steel loading.
In view of the above-mentioned problems, by carrying out accurately controlling the accuracy that ensure that ingredient to steel-making composition range, while into
One step reduces P, S constituent content, reduces steel belt roof bolt embrittlement tendency, and by addition Ni element, improves steel plate impact property,
Production process heat treatment uses offline gradient normalizing+high-temperature tempering process, successfully develops the big thickness low-temperature impact container steel of overlength
Plate and its production method ensure that steel plate yield strength and good low-temperature impact toughness requirement, intensity and toughness matched well,
Meet tankage demand, there is important Social benefit and economic benefit
The beneficial effects of adopting the technical scheme are that the 1, present invention is by being added Al content in steelmaking process
Amount is added opportunity control, while controlling vacuum argon gas, ensure that purity of steel height, superior in quality.2, production process uses
Offline gradient normalizing+high tempering heat treatment process ensure that steel plate head and tail temperature is equal using the production method of monolithic steel loading
Even, gained steel plate fully meets steels for pressure vessel use requirement, and the manufacture of pressure vessel is suitble to use.3, steel plate produced by the invention
With a thickness of 126-135mm, length 13000-14000mm, steel plate yield strength Rel >=330MPa end to end, tensile strength Rm >=
480MPa, -20 DEG C of low-temperature impact work >=70J.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
Embodiment 1
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 126mm, length 13000mm, bainite content
90%, for ferrite content 10%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 0.9 ㎏ of aluminum steel/t steel, and whole Al control is 0.030%；VD vacuum process keeps 17min,
The big argon flow of 80NL/min keeps 12min, and the small argon flow of vacuum later period 30NL/min keeps 7min, soft blow after vacuum
15min, soft blow pressure 0.27MPa；
(2) heating process: steel ingot is heated in soaking pit, 1240 DEG C of heating temperature, amounts to heating time 30h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1050 DEG C of hot stages guarantee 3 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 30%
840 DEG C of temperature, water cooling is carried out using ACC after rolling, 650 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
900 DEG C, the second 880 DEG C of ladder heating temperature is all made of water cooling twice, and 50 DEG C of steel plate red temperature；High tempering, in tempering furnace
It carries out, 710 DEG C of tempering temperature, in the total heating time 3min/mm of furnace, comes out of the stove air-cooled, required steel plate is obtained after tempering.
The mechanical property of the big thickness low-temperature impact tank plate of the present embodiment overlength is shown in Table 2.
Embodiment 2
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 130mm, length 14000mm, bainite content
89%, for ferrite content 11%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 1.1 ㎏ of aluminum steel/t steel, and whole Al control is 0.050%；VD vacuum process keeps 22min,
The big argon flow of 110NL/min keeps 20min, and the small argon flow of vacuum later period 70NL/min keeps 12min, soft after vacuum
Blow 20min, soft blow pressure 0.30MPa；
(2) heating process: steel ingot is heated in soaking pit, 1260 DEG C of heating temperature, amounts to heating time 40h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1100 DEG C of hot stages guarantee 5 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 40%
860 DEG C of temperature, water cooling is carried out using ACC after rolling, 700 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
915 DEG C, the second 865 DEG C of ladder heating temperature is all made of water cooling twice, and 60 DEG C of steel plate red temperature；High tempering, in tempering furnace
It carries out, 715 DEG C of tempering temperature, in the total heating time 4.5min/mm of furnace, comes out of the stove air-cooled, required steel plate is obtained after tempering.
The mechanical property of the big thickness low-temperature impact tank plate of the present embodiment overlength is shown in Table 2.
Embodiment 3
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 128mm, length 13500mm, bainite content
86.5%, for ferrite content 13.5%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 1.0 ㎏ of aluminum steel/t steel, and whole Al control is 0.040%；VD vacuum process keeps 20min,
The big argon flow of 90NL/min keeps 15min, and the small argon flow of vacuum later period 50NL/min keeps 10min, soft after vacuum
Blow 18min, soft blow pressure 0.29MPa；
(2) heating process: steel ingot is heated in soaking pit, 1250 DEG C of heating temperature, amounts to heating time 35h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1070 DEG C of hot stages guarantee 4 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 35%
850 DEG C of temperature, water cooling is carried out using ACC after rolling, 680 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
910 DEG C, the second 855 DEG C of ladder heating temperature is all made of water cooling twice, and 70 DEG C of steel plate red temperature；High tempering, in tempering furnace
It carries out, 720 DEG C of tempering temperature, in the total heating time 4min/mm of furnace, comes out of the stove air-cooled, required steel plate is obtained after tempering.
The mechanical property of the big thickness low-temperature impact tank plate of the present embodiment overlength is shown in Table 2.
Embodiment 4
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 135mm, length 13800mm, bainite content
88%, for ferrite content 12%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 1.05 ㎏ of aluminum steel/t steel, and whole Al control is 0.035%；VD vacuum process is kept
The big argon flow of 19min, 85NL/min keep 17min, and the small argon flow of vacuum later period 55NL/min keeps 11min, very
Soft blow 17min after sky, soft blow pressure 0.28MPa；
(2) heating process: steel ingot is heated in soaking pit, 1255 DEG C of heating temperature, amounts to heating time 39h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1080 DEG C of hot stages guarantee 5 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 38%
855 DEG C of temperature, water cooling is carried out using ACC after rolling, 680 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
920 DEG C, the second 860 DEG C of ladder heating temperature is all made of water cooling twice, and 80 DEG C of steel plate red temperature；High tempering, in tempering furnace
It carries out, 735 DEG C of tempering temperature, in the total heating time 3.5min/mm of furnace, comes out of the stove air-cooled, required steel plate is obtained after tempering.
The mechanical property of the big thickness low-temperature impact tank plate of the present embodiment overlength is shown in Table 2.
Embodiment 5
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 132mm, length 13200mm, bainite content
80%, for ferrite content 20%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 0.95 ㎏ of aluminum steel/t steel, and whole Al control is 0.045%；VD vacuum process is kept
The big argon flow of 19min, 95NL/min keep 13min, and the small argon flow of vacuum later period 60NL/min keeps 8min, vacuum
Soft blow 19min afterwards, soft blow pressure 0.29MPa；
(2) heating process: steel ingot is heated in soaking pit, 1245 DEG C of heating temperature, amounts to heating time 32h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1060 DEG C of hot stages guarantee 4 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 33%
845 DEG C of temperature, water cooling is carried out using ACC after rolling, 660 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
930 DEG C, the second 850 DEG C of ladder heating temperature is all made of water cooling twice, and 100 DEG C of steel plate red temperature；High tempering is being tempered
Furnace carries out, and 740 DEG C of tempering temperature, in the total heating time 5min/mm of furnace, comes out of the stove air-cooled, and required steel plate is obtained after tempering.
The mechanical property of the big thickness low-temperature impact tank plate of the present embodiment overlength is shown in Table 2.
Embodiment 6
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 134mm, length 13600mm, bainite content
82%, for ferrite content 18%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 0.92 ㎏ of aluminum steel/t steel, and whole Al control is 0.048%；VD vacuum process is kept
The big argon flow of 21min, 100NL/min keep 19min, and the small argon flow of vacuum later period 40NL/min keeps 9min, very
Soft blow 16min after sky, soft blow pressure 0.29MPa；
(2) heating process: steel ingot is heated in soaking pit, 1252 DEG C of heating temperature, amounts to heating time 37h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1090 DEG C of hot stages guarantee 5 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 32%
847 DEG C of temperature, water cooling is carried out using ACC after rolling, 670 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
925 DEG C, the second 870 DEG C of ladder heating temperature is all made of water cooling twice, and 90 DEG C of steel plate red temperature；High tempering, in tempering furnace
It carries out, 725 DEG C of tempering temperature, in the total heating time 3.8min/mm of furnace, comes out of the stove air-cooled, required steel plate is obtained after tempering.
The mechanical property of the big thickness low-temperature impact tank plate of the present embodiment overlength is shown in Table 2.
Embodiment 7
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 127mm, length 13400mm, bainite content
83%, for ferrite content 17%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 1.07 ㎏ of aluminum steel/t steel, and whole Al control is 0.037%；VD vacuum process is kept
The big argon flow of 19min, 105NL/min keep 16min, and the small argon flow of vacuum later period 45NL/min keeps 10min, very
Soft blow 18min after sky, soft blow pressure 0.27MPa；
(2) heating process: steel ingot is heated in soaking pit, 1247 DEG C of heating temperature, amounts to heating time 38h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1085 DEG C of hot stages guarantee 3 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 36%
852 DEG C of temperature, water cooling is carried out using ACC after rolling, 690 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
905 DEG C, the second 870 DEG C of ladder heating temperature is all made of water cooling twice, and 65 DEG C of steel plate red temperature；High tempering, in tempering furnace
It carries out, 728 DEG C of tempering temperature, in the total heating time 3.2min/mm of furnace, comes out of the stove air-cooled, required steel plate is obtained after tempering.
Embodiment 8
The big thickness low-temperature impact tank plate of the present embodiment overlength is with a thickness of 129mm, length 13700mm, bainite content
85%, for ferrite content 15%, chemical component composition and mass percentage are shown in Table 1.
The production method of the big thickness low-temperature impact tank plate of the present embodiment overlength includes steel-making, heating, rolling, heat treatment
Process, specific process step are as described below:
(1) steel making working procedure: LF packets feed 0.98 ㎏ of aluminum steel/t steel, and whole Al control is 0.032%；VD vacuum process is kept
The big argon flow of 17min, 88NL/min keep 18min, and the small argon flow of vacuum later period 35NL/min keeps 11min, very
Soft blow 17min after sky, soft blow pressure 0.30MPa；
(2) heating process: steel ingot is heated in soaking pit, 1258 DEG C of heating temperature, amounts to heating time 36h, is gone out after arriving temperature
Furnace is rolled；
(3) rolling process: 1095 DEG C of hot stages guarantee 4 passages of rolling, finish to gauge using big pressure rolling, percentage pass reduction 34%
857 DEG C of temperature, water cooling is carried out using ACC after rolling, 685 DEG C of red temperature is controlled, guarantees good crystal grain deposit；
(4) offline gradient normalizing+high-temperature tempering process, offline gradient normalizing, the first ladder heating temperature heat treatment procedure: are used
922 DEG C, the second 875 DEG C of ladder heating temperature is all made of water cooling twice, and 75 DEG C of steel plate red temperature；High tempering, in tempering furnace
It carries out, 732 DEG C of tempering temperature, in the total heating time 4.7min/mm of furnace, comes out of the stove air-cooled, required steel plate is obtained after tempering.
The mechanical property of the big thickness low-temperature impact tank plate of the present embodiment overlength is shown in Table 2.
1 embodiment 1-8 steel plate chemical component of table composition and mass percentage (%)
Ingredient surplus is Fe and inevitable impurity in table 1.
The mechanical property of 2 embodiment 1-4 steel plate of table
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to the present invention into
Go detailed description, those skilled in the art should understand that: it can still modify to the present invention or equally replace
It changes, without departing from the spirit or scope of the invention, or any substitutions, should all cover and be wanted in right of the invention
It asks in range.
Claims (10)
1. a kind of big thickness low-temperature impact tank plate of overlength, which is characterized in that the steel plate chemical component composition and its quality
Percentage composition are as follows: C:0.10-0.13%, Si:0.20-0.30%, Mn:0.40-0.60%, P≤0.006%, S≤0.003%, Cr:
0.90-1.10%, Ni:0.15-0.20%, Mo:0.45-0.60%, Al:0.020-0.045%, surplus be Fe and inevitably it is miscellaneous
Matter.
2. the big thickness low-temperature impact tank plate of a kind of overlength according to claim 1, which is characterized in that the steel plate is thick
Degree is 126-135mm, length 13000-14000mm.
3. the big thickness low-temperature impact tank plate of a kind of overlength according to claim 1, which is characterized in that the steel plate
Head, tail yield strength Rel >=330MPa, tensile strength Rm >=480MPa, -20 DEG C of low-temperature impact work >=70J.
4. the big thickness low-temperature impact tank plate of a kind of overlength according to claim 1, which is characterized in that the steel plate shellfish
Family name's body content 80-90%, ferrite content 10-20%.
5. based on a kind of production method of the big thickness low-temperature impact tank plate of overlength described in claim 1-4 any one,
It is characterized in that, the production method includes steel-making, heating, rolling, heat treatment procedure；The heat treatment procedure, using offline
Gradient normalizing+high-temperature tempering process, offline 900-930 DEG C of heating temperature of the first ladder of gradient normalizing, the second ladder heating temperature
850-880 DEG C, it is all made of water cooling, 50-100 DEG C of steel plate red temperature twice.
6. a kind of production method of the big thickness low-temperature impact tank plate of overlength according to claim 5, which is characterized in that
The steel making working procedure, LF packets feed aluminum steel 0.9-1.1 ㎏/t steel, and whole molten steel Al control is in 0.030-0.050%；VD vacuum mistake
Journey keeps 17-22min, and the big argon flow of 80-110NL/min keeps 12-20min, the small argon of vacuum later period 30-70NL/min
Throughput keeps 7-12min, soft blow 15-20min, soft blow pressure 0.27-0.30MPa after vacuum.
7. a kind of production method of the big thickness low-temperature impact tank plate of overlength according to claim 5, which is characterized in that
The heating process, steel ingot are heated in soaking pit, 1240-1260 DEG C of heating temperature, amount to heating time 30-40h.
8. a kind of production method of the big thickness low-temperature impact tank plate of overlength according to claim 5-7 any one,
It is characterized in that, the rolling process, 1050-1100 DEG C of hot stage using big pressure rolling, percentage pass reduction in 30-40%,
Guarantee rolling 3-5 passage, 840-860 DEG C of finishing temperature, water cooling is carried out using ACC after rolling, controls 650-700 DEG C of red temperature.
9. a kind of production method of the big thickness low-temperature impact tank plate of overlength according to claim 5-7 any one,
It is characterized in that, the heat treatment procedure, using offline gradient normalizing+high-temperature tempering process, the high tempering is in tempering furnace
It carries out, 710-740 DEG C of tempering temperature, in the total heating time 3-5min/mm of furnace, comes out of the stove air-cooled, required steel is obtained after tempering
Plate.
10. a kind of production method of the big thickness low-temperature impact tank plate of overlength according to claim 5-7 any one,
It is characterized in that, the heat treatment procedure, by the way of monolithic steel loading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910343608.7A CN110055472A (en) | 2019-04-26 | 2019-04-26 | A kind of big thickness low-temperature impact tank plate of overlength and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910343608.7A CN110055472A (en) | 2019-04-26 | 2019-04-26 | A kind of big thickness low-temperature impact tank plate of overlength and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110055472A true CN110055472A (en) | 2019-07-26 |
Family
ID=67321043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910343608.7A Pending CN110055472A (en) | 2019-04-26 | 2019-04-26 | A kind of big thickness low-temperature impact tank plate of overlength and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110055472A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000273570A (en) * | 1999-03-19 | 2000-10-03 | Japan Casting & Forging Corp | Cast steel for pressure vessel and production of pressure vessel using the same |
| CN105102653A (en) * | 2013-03-29 | 2015-11-25 | 杰富意钢铁株式会社 | Steel structure for hydrogen, and method for manufacturing pressure accumulator for hydrogen and line pipe for hydrogen |
| CN108286015A (en) * | 2018-01-19 | 2018-07-17 | 舞阳钢铁有限责任公司 | Pressure vessel SA387Gr12Cl2 steel plates and its production method |
| CN109112400A (en) * | 2018-08-31 | 2019-01-01 | 舞阳钢铁有限责任公司 | A kind of container heat-resisting 12Cr1MoVR steel plate and its production method |
| US20190024206A1 (en) * | 2015-12-23 | 2019-01-24 | Posco | Steel material having excellent hydrogen-induced cracking (hic) resistance for pressure vessel and manufacturing method therefor |
-
2019
- 2019-04-26 CN CN201910343608.7A patent/CN110055472A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000273570A (en) * | 1999-03-19 | 2000-10-03 | Japan Casting & Forging Corp | Cast steel for pressure vessel and production of pressure vessel using the same |
| CN105102653A (en) * | 2013-03-29 | 2015-11-25 | 杰富意钢铁株式会社 | Steel structure for hydrogen, and method for manufacturing pressure accumulator for hydrogen and line pipe for hydrogen |
| US20190024206A1 (en) * | 2015-12-23 | 2019-01-24 | Posco | Steel material having excellent hydrogen-induced cracking (hic) resistance for pressure vessel and manufacturing method therefor |
| CN108286015A (en) * | 2018-01-19 | 2018-07-17 | 舞阳钢铁有限责任公司 | Pressure vessel SA387Gr12Cl2 steel plates and its production method |
| CN109112400A (en) * | 2018-08-31 | 2019-01-01 | 舞阳钢铁有限责任公司 | A kind of container heat-resisting 12Cr1MoVR steel plate and its production method |
Non-Patent Citations (1)
| Title |
|---|
| 第5期: "加氢反应器用大厚度12Cr2Mo1VR钢板的研制开发", 《宽厚板》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7275137B2 (en) | Steel plate with excellent toughness, ductility and strength and method for producing the same | |
| CN105603325B (en) | A kind of 600MPa grades of hot dip galvanized dual phase steel containing vanadium and preparation method thereof | |
| KR101638719B1 (en) | Galvanized steel sheet and method for manufacturing the same | |
| CN108018484A (en) | A kind of tensile strength is in more than 1500MPa and the cold rolling high-strength steel and its manufacture method that have excellent moldability | |
| CN107502819B (en) | A kind of 600MPa grades of 0.6mm or less thin gauge cold-rolled biphase steel and preparation method thereof | |
| CN106011631B (en) | A kind of 800MPa levels low-carbon hot dip galvanized dual phase steel and preparation method thereof | |
| CN108396243B (en) | Hard tinned substrate for bottle cap and production method thereof | |
| CN111356781B (en) | High-strength hot-rolled steel sheet having excellent bendability and low-temperature toughness, and method for producing same | |
| CN114737027B (en) | 345 MPa-level container steel with excellent hydrogen induced cracking resistance and preparation method thereof | |
| JP2009035816A (en) | Process for producing high-strength cold rolled steel sheet with low yield strength and with less material quality fluctuation | |
| KR102200227B1 (en) | Cord rolled steel sheet, hot-dip galvanized steel sheet having good workability, and manufacturing method thereof | |
| JPH11199991A (en) | Steel sheet for can excellent in aging resistance and baking hardenability and its production | |
| CN110172638B (en) | High-temperature carburized gear steel and production method thereof | |
| CN110983197A (en) | 800MPa grade high cold-bending cold-rolling dual-phase steel plate and preparation method thereof | |
| WO2006118423A1 (en) | Cold rolled steel sheet having superior formability , process for producing the same | |
| KR101543838B1 (en) | Low yield ratio high-strength hot rolled steel sheet having excellent impact resistance and method for manufacturing the same | |
| CN111647803B (en) | Copper-containing high-strength steel and preparation method thereof | |
| KR20160138771A (en) | Tmcp typed steel and method of manufacturing the same | |
| CN110055472A (en) | A kind of big thickness low-temperature impact tank plate of overlength and its production method | |
| CN112912532B (en) | High-strength steel material having excellent sulfide stress corrosion cracking resistance and method for producing same | |
| JP2002275576A (en) | Low yield ratio steel for low temperature use and production method therefor | |
| CN113957344A (en) | Corrosion-resistant structural steel plate with yield strength of 450MPa and production method thereof | |
| KR101543837B1 (en) | High yield ratio high-strength hot rolled steel sheet having excellent impact resistance and method for manufacturing the same | |
| KR20130076959A (en) | Ultra-high strength steel sheet with 980mpa grade tensile strength and excellent galvanizing property and method of manufacturing the steel sheet | |
| KR101543836B1 (en) | High strength hot rolled steel sheet having excellent impact resistance and formability and method for manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190726 |