CN104451387B - A kind of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate and production method thereof - Google Patents
A kind of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate and production method thereof Download PDFInfo
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- CN104451387B CN104451387B CN201410794962.9A CN201410794962A CN104451387B CN 104451387 B CN104451387 B CN 104451387B CN 201410794962 A CN201410794962 A CN 201410794962A CN 104451387 B CN104451387 B CN 104451387B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The invention belongs to steel industry view, be specifically related to a kind of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate and production method thereof.09MnNiDR spy's thickness low-temperature (low temperature) vessel plate of the present invention, the composition of its mass percent is as follows: C:0.08 0.12%, Si:0.20 0.45%, Mn:1.40 1.60%, P≤0.018%, S≤0.005%, Nb:0.025 0.040%, Ni:0.40 0.55%, Ti:0.008 0.025%, Alt:0.020 0.050%, other are Fe and inevitable impurity.Utilizing common intermediate gauge continuous casting steel billet by the compound extra-thick plate blank of vacuum electron beam welding technology preparation, the ingenious standard-required Billet Being Upset between Two ratio that meets is not less than the requirement of 3, and power consumption that base mode small investment is pollution-free is low, flexibly and easily.The steel plate properties of preparation fully meets GB3531 2014 requirement.
Description
Technical field
The invention belongs to steel industry view, relate to special thick steel for low-temperature pressure container manufacture, be specifically related to one
09MnNiDR spy's thickness low-temperature (low temperature) vessel plate and production method thereof.
Background technology
Along with the fast development of the industries such as China's oil chemical industry, Coal Chemical Industry, the design of pressure vessel and manufacture are just towards greatly
Thickness, high parameter direction are developed, and the safety of pressure vessel especially low-temperature pressure container is had higher requirement by this.
Wherein-70 DEG C of steel for low-temperature pressure container of 09MnNiDR conduct, the low-temperature flexibility superior by it and welding performance ethylene,
The cryogenic systems such as chemical fertilizer, town gas, carbon dioxide are widely applied, there is the boundless market demand.At present,
It is to meet the 3:1 compression ratio requirement that standard specifies during the 09MnNiDR Plate Production of domestic more than 100mm, mainly passes through 300mm
The biggest thickness casting machine, caststeel ingot, electroslag remelting steel ingot are raw material production, and the high utilization of capacity of big thickness big cross section casting machine investment is low,
Steel ingot energy consumption high pollution weight lumber recovery is low, and the usual center porosity of both raw materials and segregation defects are serious, rolls rear steel plate heart portion and loses
The various mass defect problems passed are many, although electric slag refusion ingot quality is high but the high productivity ratio of energy consumption is extremely low.Vacuum welding is combined
Ply rolling technique be utilize 2 pieces to clean out with the surface milling of stove original blank after carry out vacuum and be combined assembly, can select relatively thin
The original blank (its defect such as center porosity, center segregation is the lightest) of thickness, continuous casting billet through combination after, its original casting
Base center thickness position adjustment is at nearly 1/4 thickness of whole combination blank, and heart portion is at the original strand near surface after cleaning,
Heart portion quality is better than the special thick strand of tradition or steel ingot is the steel plate of raw material production.
Summary of the invention
It is an object of the invention to provide a kind of slab and be combined the manufacture of ply rolling production 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate
Method.
The present invention is to be realized by following technical scheme:
A kind of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, the composition of its mass percent is as follows: C:0.08-0.12%, Si:
0.20-0.45%, Mn:1.40-1.60%, P≤0.018%, S≤0.005%, Nb:0.025-0.040%, Ni:0.40-0.55%,
Ti:0.008-0.025%, Alt:0.020-0.050%, other are Fe and inevitable impurity.
Above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, it is characterised in that its thickness range is > 90-120mm ,-70 DEG C are low
Temperature side knock KV2 >=120J.
The production method of above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, comprises the steps: that (1) smelts (2) casting
(3) compound base (4) heating (5) rolling (6) heat treatment.
In the production method of above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, described smelting process is: raw material molten iron need through
The deep desulfurization of KR processes, and after process, molten iron utilizes top and bottom combined blown converter smelting, after converter tapping, in Argon station Argon at least 10
More than minute, and feed aluminum steel deoxidation treatment；LF refine is made white slag and is processed, and P, S content requirement is the lowest, and Al content presses 0.030%
Desired value controls, and the middle limit value that other elements are formed by above-mentioned steel grade mass percent carries out trimming；Molten steel RH or VD is true
In empty refining process, it is desirable to protect vacuum time >=15min, feeding calcium iron wire Calcium treatment after application of vacuum, process is protected after terminating
Demonstrate,proving soft argon blowing time >=10min, argon flow amount stirs slightly with molten steel, stirs diameter 100-200mm and is as the criterion.
In the production method of above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, described casting process is: steel after application of vacuum
Water is poured into a mould through 250mm or 270mm Plate production whole process protection, and Peritectic Alloy steel mould flux selected by crystallizer, it is desirable to
Tundish low overheat 10-25 DEG C cast, constant temperature constant speed draws steel, the two weak cold water distribution systems of cold employing, continuous casting billet roll off the production line after immediately
Enter thermal insulation cover or holding pit stacking slow cooling more than 48 hours.
In the production method of above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, described compound blank-making technology is: original blank
Surface is stripped off the skin process through sleeping milling machine, after cleaning out again to the strand group two-by-two of same stove to and align, center seam surrounding
Electric arc spot welding is fixed by hand, weld width 0.1-0.35mm after combination, in vacuum chamber, utilizes electron beam welding technology to multiple
The surrounding closing blank carries out integral solder sealing, it is thus achieved that 1 piece complete treats rolling stock, electron beam speed of welding about 4mm/s.
Compound rear sotck thinkness 530mm of the compound rear original strand of sotck thinkness 490mm ± 10mm, 270mm of the original strand of 250mm ±
20mm。
Blank used by special thick container panel uses 2 blocks of conventional 250mm or 270mm thickness continuous casting billets with stove, by its boundary to be composite
At face after sleeping milling machine milling clearing up, then blank aligning spot welding combination, the blank after combination recycles in vacuum chamber
Electron beam welding technology carries out integral sealing welding to its surrounding gap, and finally obtain treats that rolling stock adds through follow-up again
Heat, roll and be thermally treated resulting in the special thick 09MnNiDR steel plate that maximum gauge is 120mm.Conventional continuous casting billet secondary group utilized above
The technique rolled again after closing base, achieves the compression ratio requirement not less than 3 dexterously.
In the production method of above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, described heating, rolling mill practice be: treats rolling stock
Before entering trolley type heating furnace heating, surface first should be done anti-oxidation spraying to process.Heating furnace heat time heating time according to original furnace temperature and
Sotck thinkness is pressed 13-20 hour not wait and is controlled, and heating-up temperature presses 1260-1280 DEG C of setting.In the operation of rolling, use thick, finish rolling
Roll stage by stage, it is ensured that the workpiece thickness of 90,100mm specifications is not less than the workpiece thickness of 150mm, more than 100mm specification
By 1.5 times of controls not less than finished product thickness.Finish rolling is controlled by finishing temperature 860-880 DEG C, rolls rear steel plate and immediately enters slow cooling
Hole slow cooling is to room temperature.
Compound ply rolling technique avoids above-mentioned big cross section strand, steel ingot, the highly energy-consuming height dirt of three kinds of techniques existence of ESR ingot
Contaminate the shortcomings such as with high investment, convenient, flexible, can well solve general steel plate large-scale production and produce existence with small lot special heavy plate
Raw material prepare contradiction.
In the production method of above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, described Technology for Heating Processing is: steel plate after cooling
Carrying out normalizing heat treatment, normalizing temperature is 910 ± 10 DEG C, time inside furnace 1.6-1.8min/mm.As user requires normalizing+tempering
During delivery, temper temperature 650 ± 10 DEG C, time inside furnace 2.2-2.5min/mm, steel plate come out of the stove after natural cooling, collect temperature
Degree must not be higher than 150 DEG C.
The production method of above-mentioned 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, its detailed step comprises below scheme:
Blast-melted → molten iron pretreatment → converter smelting → deoxidation alloying → LF → VD(RH) → continuous casting → 48h strand
Slow cooling → strand interface plane milling cleaning → spot welding combination → vacuum chamber electron beam welding assembly → anti-oxidation spraying → composite billet adds
Heat → rolling → aligning → cooling (burial pit slow cooling) → cutting → normalizing → (tempering) → detect a flaw → sample → check, indicate →
Warehouse-in.
The special thick 09MnNiDR low-temperature (low temperature) vessel plate of the present invention in meeting GB3531-2014 on the basis of regulation performance, steel
Plate thickness direction tension test (Z-direction stretching) contraction percentage of area reaches more than 35%, shows that it has higher anti-lamellar tearing
Energy；Steel plate reaches the JB/T4730.3 qualified level of Ι level, and metallographic structure at compound interface through 100% full plate face defect detecting test
There is not sharp interface, show that composite blank combines together after ply rolling technique the most completely, user can be met in welding, processing
With use time to steel plate heart portion's bond strength and the requirement of anti-lamellar tearing performance.
The invention have the benefit that
(1) thick continuous casting steel billet in routine is utilized to be combined extra-thick plate blank by the preparation of vacuum electron beam welding technology, ingenious full
Foot standard-required Billet Being Upset between Two than be not less than 3 requirement, power consumption that base mode small investment is pollution-free is low, flexibly and easily.
(2) the special thick low-temperature (low temperature) vessel steel plate of this invention can reach Ι in JB/T4730.3 through 100% full plate face defect detecting test
The qualified level of level, at compound interface there is not sharp interface in metallographic structure, shows that composite blank is the most complete after ply rolling technique
Combine together.
(3) utilization is combined, with two pieces of continuous casting billet vacuum weldings of stove, 09MnNiDR spy's thickness pressure vessel steel that ply rolling technique produces
Plate, heart portion quality is better than tradition strand, and steel plate Z-direction Tensile fracture shrinkage factor reaches >=35% level, has good bond strength
With anti-lamellar tearing performance, meet user's welding processing and use requirement.
(4) the special thick 09MnNiDR low-temperature (low temperature) vessel steel plate of the present invention, by optimizing component proportion, vacuum welding is combined, table
Face anti-oxidation spraying, controlled rolling and heat treatment, obtain preferable pearlite+ferritic structure, and its crystal grain is the most tiny, and steel plate has
Good obdurability, on the basis of performance conformance with standard GB3531-2014, substantially increases its impact flexibility ,-70 DEG C of heart portion
Side knock merit stably reaches 120J level above, far above the 60J requirement of national Specification.
(5) mountain steel share Jinan branch company rate at home is combined ply rolling technique first with vacuum welding and produces super-thick steel plate,
This patent is the special thick 09MnNiDR Steel plate for low-temperature vessel utilizing this technology successfully to produce maximum gauge 120mm, and steel plate is each
Item performance fully meets GB3531-2014 requirement, and the 120mm thickness 09MnNiDR steel plate utilizing this technology to produce has passed through China
Special equipment detects graduate every inspection and the Technical Review of boilers and pressure vessel technical committee for standardization (TCST), for special thick pressure
The production of force container steel plate is prepared and is provided new method.
Accompanying drawing explanation
Fig. 1 is metallographic at the steel plate compound interface of the embodiment of the present invention 1 preparation.
Fig. 2 is metallographic at the steel plate compound interface of the embodiment of the present invention 2 preparation.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described, in order to those skilled in the art knows more about
The present invention, but and it is not so limited the present invention.
Embodiment one
09MnNiDR spy's thickness low-temperature (low temperature) vessel steel of the present embodiment is to be prepared from by the component of following mass percent: C:
0.10%, Si:0.31%, Mn:1.45%, P:0.010%, S:0.003%, Nb:0.030%, Ni:0.52%, Ti:0.019%, Alt:
0.029%, remaining is Fe and inevitable impurity.
The preparation method of 09MnNiDR spy's thickness steels for pressure vessel use of the present embodiment is as follows:
1) smelting process: after raw material molten iron KR pretreatment, through 120t top and bottom combined blown converter smelting, ladle after converter tapping
Argon 12 minutes also feeds aluminum steel deoxidation treatment, and LF refining furnace refine sent into by molten steel, carries out after the trim process of temperature and composition again
Application of vacuum in VD stove, protects vacuum time 17 minutes, and process feeds calcium iron wire 2m/t, soft blow argon 15 points after line feeding after terminating
Clock, soft blow is respond well, and ladle liquid level stirs diameter about 140mm；
2) casting process: 270mm × 2100mm sectional board billet continuous casting machine cast on molten steel after the process of VD stove, in casting process
Casting machine uses Segment Electromagnetic Stirring and strand soft reduction technique, and the middle bag degree of superheat fluctuates 12-20 DEG C of scope, and pulling rate keeps
1.00m/min, continuous casting billet roll off the production line after stacking slow cooling 48 hours；
3) compound base: carry out 2 pieces of combined interface with size continuous casting billet and side digging milling cleaning, overlay after cleaning
Spot welding combination together, after combination, weld width is 0.15-0.32mm, and some postwelding composite billet utilizes vacuum electron beam welding technology to incite somebody to action
Faying face seal weld is connected into the composite plate blanks to be rolled of 530mm thickness, electron beam speed of welding 4mm/s.
4) heating technique: the composite plate blanks after spraying antioxidizing paint heats 17 hours in bogie furnace, adds thermal target
Temperature 1260-1270 DEG C, through high-pressure water descaling after coming out of the stove.
5) rolling mill practice: use slightly, finish rolling rolls stage by stage, roughing start rolling temperature about 1100 DEG C, rolls workpiece thickness
For 200mm, finish rolling start rolling temperature 940 DEG C, finishing temperature 880 DEG C, mill product steel plate specification is 120mm, and compression ratio is 4.4
Times, roll rear steel plate and enter burial pit slow cooling to room temperature.
6) Technology for Heating Processing: steel plate normalized treatment after slow cooling, treatment temperature is 910 DEG C, and time inside furnace 216min, steel plate goes out
Furnace rear air cooling is to room temperature.
09MnNiDR spy thickness low-temperature (low temperature) vessel steel thickness 120mm prepared by the present embodiment.
Embodiment two
The preparation method of 09MnNiDR spy's thickness low-temperature (low temperature) vessel steel of the present embodiment is this with embodiment one, difference
Steel is to be prepared from by following mass percent component: C:0.09%, Si:0.35%, Mn:1.43%, P:0.012%, S:0.002%,
Nb:0.028%, Ni:0.50%, Ti:0.022%, Alt:0.035%, remaining is Fe and inevitable impurity.Smelt and use 210t
Top and bottom combined blown converter smelting, ladle argon-blown 10 minutes after converter tapping, molten steel, through RH stove application of vacuum, protects vacuum time 15 points
Clock, process feeds calcium iron wire 2.2m/t after terminating, and soft blow argon 20 minutes after line feeding, ladle liquid level stirs diameter about 120mm；RH stove
250mm × 2200mm sectional board billet continuous casting machine cast on molten steel after process, in casting process, casting machine uses strand soft reduction technique,
The middle bag degree of superheat fluctuates 12-25 DEG C of scope, and pulling rate keeps 0.90m/min, uses 2 blocks of 250mm thickness continuous casting billets with size multiple
After conjunction, raw material base thickness is 490mm, and composite billet is 15 hours in heating furnace heat time heating time, workpiece thickness 180mm, finish rolling finish to gauge
Temperature 870 DEG C, mill product steel plate specification is 100mm, and compression ratio is 4.9 times, and heat treatment uses normalizing+tempering heat treatment, just
Fire treatment temperature 908 DEG C, time inside furnace 170min；Temper temperature 650 DEG C, time inside furnace 230min.
09MnNiDR spy thickness low-temperature (low temperature) vessel steel thickness 120mm prepared by the present embodiment.
Embodiment three
The preparation method of 09MnNiDR spy's thickness low-temperature (low temperature) vessel steel of the present embodiment is 2 with embodiment one, difference
After block continuous casting billet spot welding combination, weld width is 0.1-0.35mm, and compound rear raw material base thickness is 525mm, and composite billet is at heating furnace
Heat time heating time is 18 hours, and workpiece thickness is 185mm, finish rolling finishing temperature 865 DEG C, and mill product steel plate specification is 105mm,
Compression ratio is 5 times, and normalized treatment temperature is 915 DEG C, and time inside furnace is 180 minutes.
The 09MnNiDR Steel plate for low-temperature vessel of preparation in above example one to three is carried out Mechanics Performance Testing, such as table
1, shown in 2,3.
Claims (7)
1. 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate, it is characterised in that the composition of its mass percent is as follows: C:0.08-
0.12%, Si:0.20-0.45%, Mn:1.40-1.60%, P≤0.018%, S≤0.005%, Nb:0.025-0.040%,
Ni:0.40-0.55%, Ti:0.008-0.025%, Alt:0.020-0.050%, other are Fe and inevitable impurity；Its
Preparation method comprises the steps: that (1) smelts (2) casting (3) compound base (4) heating (5) rolling (6) heat treatment；Wherein, institute
Stating compound blank-making technology is: surface is stripped off the skin process by original blank through sleeping milling machine, strand to same stove again after cleaning out
Two-by-two group to and align, the electric arc spot welding by hand of center seam surrounding is fixed, and weld width 0.1-0.35mm after combination, at vacuum chamber
In, utilize electron beam welding technology that the surrounding of composite blank is carried out integral solder sealing, it is thus achieved that 1 piece complete treats rolling stock,
Electron beam speed of welding 4mm/s, after the original strand of 250mm is compound, sotck thinkness is that the original strand of 490mm ± 10mm, 270mm is multiple
Sotck thinkness 530mm ± 20mm after conjunction.
09MnNiDR spy's thickness low-temperature (low temperature) vessel plate the most according to claim 1, it is characterised in that its thickness range is 90-
120mm ,-70 DEG C of low temperature side knock KV2 >=120J.
3. the production method of the 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate described in claim 1, it is characterised in that include walking as follows
Rapid: (1) smelts (2) casting (3) compound base (4) heating (5) rolling (6) heat treatment；Described compound blank-making technology is: original base
Surface is stripped off the skin process by material through sleeping milling machine, after cleaning out again to the strand group two-by-two of same stove to and align, center seam four
Week electric arc spot welding by hand is fixed, and weld width 0.1-0.35mm after combination, in vacuum chamber, utilizes electron beam welding technology pair
The surrounding of composite blank carries out integral solder sealing, it is thus achieved that 1 piece of complete rolling stock for the treatment of, electron beam speed of welding 4mm/s,
After the original strand of 250mm is compound sotck thinkness be the original strand of 490mm ± 10mm, 270mm compound after sotck thinkness 530mm ±
20mm。
The production method of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate the most according to claim 3, it is characterised in that described smelting
Technique is: raw material molten iron need to process through the deep desulfurization of KR, and after process, molten iron utilizes top and bottom combined blown converter smelting, and converter tapping is complete
After, Argon station Argon more than 10 minutes, and feed aluminum steel deoxidation treatment；LF refine is made white slag and is processed, and P, S content requirement is as far as possible
Low, Al content is controlled by 0.030% desired value, and the middle limit value that other elements are formed by above-mentioned steel grade mass percent carries out composition
Fine setting；In molten steel RH or VD vacuum refining processing procedure, it is desirable to protect vacuum time >=15min, after application of vacuum, feed calcium iron wire calcium
Processing, process ensures soft argon blowing time >=10min after terminating, argon flow amount stirs slightly with molten steel, stirs diameter 100-200mm
It is as the criterion.
The production method of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate the most according to claim 3, it is characterised in that described casting
Technique is: after application of vacuum, molten steel is poured into a mould through 250mm or 270mm Plate production whole process protection, and crystallizer selects peritectoid to close
Gold steel mould flux, it is desirable to tundish low overheat 10-25 DEG C cast, constant temperature constant speed draws steel, the two weak cold water distribution systems of cold employing
Degree, continuous casting billet enters thermal insulation cover or holding pit stacking slow cooling more than 48 hours immediately after rolling off the production line.
The production method of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate the most according to claim 3, it is characterised in that described in add
Hot, rolling mill practice is: treat that surface first should be done anti-oxidation spraying before entering trolley type heating furnace heating and be processed by rolling stock, heating furnace
Heat time heating time is 13-20 hour, and heating-up temperature presses 1260-1280 DEG C of setting, and in the operation of rolling, employing is thick, finish rolling is rolled stage by stage
System, it is ensured that the workpiece thickness of 90,100mm specifications is not less than 150mm, more than the workpiece thickness of 100mm specification by being not less than
1.5 times of controls of finished product thickness, finish rolling is controlled by finishing temperature 860-880 DEG C, rolls rear steel plate and immediately enter burial pit slow cooling extremely
Room temperature.
The production method of 09MnNiDR spy's thickness low-temperature (low temperature) vessel plate the most according to claim 3, it is characterised in that described rolling
Technique is: after cooling, steel plate carries out normalizing heat treatment, and normalizing temperature is 910 ± 10 DEG C, time inside furnace 1.6-1.8min/mm, as
When user requires normalizing+tempering delivery, temper temperature 650 ± 10 DEG C, time inside furnace 2.2-2.5min/mm, steel plate is come out of the stove
Rear natural cooling, collecting temperature must not be higher than 150 DEG C.
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| CN110029268B (en) * | 2019-03-27 | 2021-03-26 | 江阴兴澄特种钢铁有限公司 | 09MnNiDR steel plate for low-temperature pressure vessel with core low-temperature toughness protection and manufacturing method thereof |
| CN110468248A (en) * | 2019-09-02 | 2019-11-19 | 湖南华菱湘潭钢铁有限公司 | A kind of method of dephosphorization after Converter |
| CN111270149B (en) * | 2020-03-30 | 2021-11-19 | 南京钢铁股份有限公司 | Production method of ultralow-temperature high-center impact large-thickness 13MnNi6-3 container steel |
| CN112322992A (en) * | 2020-11-04 | 2021-02-05 | 山东钢铁集团日照有限公司 | Method for manufacturing low-alloy super-thick steel plate with excellent low-temperature toughness |
| CN114318142A (en) * | 2021-12-20 | 2022-04-12 | 舞阳钢铁有限责任公司 | 130mm super-thick 09MnNiDR steel plate and production method thereof |
| CN115558865A (en) * | 2022-10-21 | 2023-01-03 | 燕山大学 | Hydrogen corrosion resistant normalized high-strength and high-toughness container steel plate for mobile tank car and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0344417A (en) * | 1989-07-11 | 1991-02-26 | Nippon Steel Corp | Production of thick steel plate for welded structure having excellent internal quality |
| JP3083247B2 (en) * | 1995-07-26 | 2000-09-04 | 新日本製鐵株式会社 | Method for producing stainless steel strip by continuous casting hot rolling and heat treatment furnace for continuous casting hot rolling of stainless steel strip |
| CN101144138B (en) * | 2007-11-01 | 2011-05-25 | 济南钢铁股份有限公司 | Producing method of steel plate for low temperature pressure container and thereof |
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