CN102747278A - Manufacturing method of steel plate for pressure vessel - Google Patents
Manufacturing method of steel plate for pressure vessel Download PDFInfo
- Publication number
- CN102747278A CN102747278A CN2012102236522A CN201210223652A CN102747278A CN 102747278 A CN102747278 A CN 102747278A CN 2012102236522 A CN2012102236522 A CN 2012102236522A CN 201210223652 A CN201210223652 A CN 201210223652A CN 102747278 A CN102747278 A CN 102747278A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- steel
- rolling
- billet
- plate
- 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
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to a manufacturing method of a steel plate for a pressure vessel. The method comprises the following successive steps: I. smelting molten iron, and conducting continuous casting to obtain a continuous casting billet with thickness of 200-220mm; II. billet heating: heating the billet to 1200-1250 DEG C in a heating furnace, and insulating for 3-4 hours;III. rolling: descaling the billet with high pressure water, rolling the billet on a 3000 mm roughing mill, and rolling the billet on a 3300 finishing mill, with a final rolling temperature controlled at 800-850 DEG C; IV. cooling: carrying out air cooling on the steel plate to 700-750 DEG C, starting water cooling and controlling a self-tempering temperature of the plate at 320-580 DEG C; V. straightening: carrying out hot straightening on the steel plate to realize no more than 6mm / 1000mm; VI. off-line tempering: heating the steel plate to 615-655 DEG C, insulating for 40-50 minutes, and taking out the steel plate for natural cooling; and VII. tensile test: conducting tensile test on the steel plate after tempering. The manufacturing method of the steel plate for pressure vessel has short production process and low cost.
Description
Technical field
The present invention relates to a kind of method of manufacture of steel heavy plate for pressure vessels.
Background technology
The applicant uses the quenching and tempering, high plate in order to develop a kind of pressurized vessel, and this steel plate is mainly used in the crucial metallic substance of Large Oil Tank.This steel plate tensile strength Rm behind off-line quenching+high tempering reaches 610～730Mpa, unit elongation A >=17% ,-20 ℃ of ballistic work AKv >=100J.In actual trial-manufacturing process, owing to behind the steel plate rolling, need off-line heating, quenching, tempering, the technological process of production is long, and cost is high.
Summary of the invention
In order to overcome the high above-mentioned deficiency of off-line quenching+tempering process long flow path, cost of the method for manufacture that has steels for pressure vessel use now, the present invention provides the method for manufacture of the steel heavy plate for pressure vessels that a kind of Production Flow Chart is short, cost is low, quality is high.
Design of the present invention is that steel heavy plate for pressure vessels is adopted controlled rolling+controlled chilling+off-line tempering process, obtains good comprehensive mechanical properties, good plate shape, reduces manufacturing cost simultaneously.
The method of manufacture of this steel heavy plate for pressure vessels comprises following sequential steps:
ISmelt
After hot metal pretreatment, 180 tons of converter top and bottom complex blowings, LF refining and RH outgased, continuous casting became the thick continuously cast bloom of 200～220mm;
IIThe steel billet heating
The steel billet that 200～220mm is thick is incubated 3～4 hours process furnace internal heating to 1200 ℃～1250 ℃.
IIIRolling
Through high-pressure water descaling, the steel billet behind the high-pressure water descaling is rolling on the 3000mm roughing mill, 1050-1080 ℃ of start rolling temperatures, the intermediate blank gauge control is at 45～65mm, and is rolling on 3300 finishing mills afterwards, and finishing temperature is controlled at 800～850 ℃.
IVCooling
Steel plate air cooling to 700～750 ℃, the beginning water-cooled, the water yield is 120～200m
3/ h, the water yield is than 2.0～2.5, roller speed 0.85～0.95m/s, steel plate returns red temperature and is controlled at 320～580 ℃.
VAligning
Steel plate is carried out hot straightening, reach≤6mm/1000mm.
VIThe off-line tempering
Steel plate after the side cut takes out steel billet and in air, naturally cools to room temperature normalizing furnace internal heating to 615 ℃～655 ℃ insulation 40～50 minutes.
VIITensile testing
Steel plate after the tempering carries out tensile testing.Ys Rel is 515～575MPa, and tensile strength is Rm 630～690MPa MPa, and unit elongation A is that 21～25% ,-20 ℃ of ballistic work KV2 are 190～250J, and steel plate width direction roughness is 5mm ± 1/1000mm.
Excellent its of the method for manufacture of this steel heavy plate for pressure vessels is applicable to following two steel grades:
The quality per distribution ratio of the composition of steel grade one is (%):
C：0.08～0.12，?Si：0.25～0.40， Mn：1.20～1.60， ?P：≤0.010，
S：≤0.005， Ni：0.15～0.40， V：0.02～0.06， Nb：0.02～0.04，
Ti:0.01～0.03, Al:0.01～0.03, O :≤20PPm, N:25～50PPm, all the other are Fe and unavoidable impurities.
The quality per distribution ratio of the composition of steel grade two is (%):
C：0.08～0.12，?Si：0.25～0.40， Mn：1.20～1.60， P：≤0.010，
S：≤0.005， Ni：0.15～0.40，?V：0.02～0.06， Ti：0.01～0.03，
Al：0.01～0.03，O：≤20PPm，N：25～50PPm，
All the other are Fe and unavoidable impurities.
This steels for pressure vessel use adopts controlled rolling and controlled cooling+off-line tempering method, and rolling intact back direct water-cooling has been cancelled reheat, two operations of quenching, and production cost reduces by 300～500 yuan/ton.After the steel billet heating; Adopt non-recrystallize controlled rolling, control lower finishing temperature, get into laminar flow cooling carrying out controlled rolling and controlled cooling fast; Control is the suitable water yield evenly; Steel plate returns 300～600 ℃ of red temperature, and off-line carries out 620～650 ℃ tempering, and the mechanical property of steel plate, plate shape are satisfied standard-required.
Embodiment
Specify embodiment of the present invention below in conjunction with embodiment, but embodiment of the present invention is not limited to following embodiment.
Embodiment 1
Steel heavy plate for pressure vessels is thick to be 32mm.The quality per distribution ratio of its chemical ingredients is (%):
C：0.08～0.12，?Si：0.25～0.40， Mn：1.20～1.60， ?P：≤0.010，
S：≤0.005， Ni：0.15～0.40， V：0.02～0.06， Nb：0.02～0.04，
Ti:0.01～0.03, Al:0.01～0.03, O :≤20PPm, N:25～50PPm, all the other are Fe and unavoidable impurities.
The embodiment one of this steels for pressure vessel use method of manufacture is a following sequential steps:
ISmelt
Adopt hot metal pretreatment, 180 tons of converter top and bottom complex blowings, 180 tons of LF refinings, 180 tons of RH to outgas, be cast into the thick continuously cast bloom of 220mm.The mass percent of the composition of continuously cast bloom is:
C：0.08， Si：0.25， Mn：1.25，?P：0.005， S：0.0020，
Ni：0.25， V：0.04， Nb：0.02， Ti：0.02， Al：0.02，
O:15PPm, N:30PPm, all the other are Fe and unavoidable impurities.
IIThe steel billet heating
The steel billet that 220mm is thick is incubated 4 hours at process furnace internal heating to 1220 ℃.
IIIRolling
Through high-pressure water descaling, the steel billet behind the high-pressure water descaling is rolling on the 3000mm roughing mill, 1060 ℃ of start rolling temperatures, the intermediate blank gauge control is at 65mm, and is rolling on 3300 finishing mills afterwards, and finishing temperature is controlled at 805 ℃.
IVCooling
Steel plate air cooling to 728 ℃, the beginning water-cooled, the water yield is 180 m
3/ h, the water yield is than 2.3, roller speed 0.85m/s, steel plate returns red temperature and is controlled at 550 ℃.
VAligning
With the steel plate hot straightening, aligning back 4mm/1000mm.
VIThe off-line tempering
Steel plate after the side cut takes out steel billet and in air, naturally cools to room temperature normalizing furnace internal heating to 625 ℃ insulation 45 minutes.
VIITensile testing
Steel plate after the tempering carries out tensile testing.Ys Rel is 525MPa, and tensile strength is Rm 640 MPa, and unit elongation A is that 23% ,-20 ℃ of ballistic work KV2 are 225J, and steel plate width direction roughness is 5mm/1000mm.Plate quality satisfies request for utilization.
Embodiment 2
Steel heavy plate for pressure vessels is thick to be 12mm.The quality per distribution ratio of its chemical ingredients is following:
C：0.08～0.12，?Si：0.25～0.40，?Mn：1.20～1.60， P：≤0.010，
S：≤0.005， Ni：0.15～0.40，V：0.02～0.06，Ti：0.01～0.03，
Al:0.01～0.03, O :≤20PPm, N:25～50PPm, all the other are Fe and unavoidable impurities.
The embodiment of this steels for pressure vessel use sends out two and is following sequential steps:
ISmelt
Adopt hot metal pretreatment, 180 tons of converter top and bottom complex blowings, 180 tons of LF refinings, 180 tons of RH to outgas, be cast into the thick continuously cast bloom of 220mm.
The mass percent of the composition of continuously cast bloom is:
C：0.10， Si：0.32， Mn：1.40，?P：0.008， S：0.0025，
Ni:0.27, V:0.04, Ti:0.02, Al:0.02, O:18 PPm, N:32 PPm, all the other are Fe and unavoidable impurities
IIThe steel billet heating
The steel billet that 220mm is thick is incubated 4 hours at process furnace internal heating to 1220 ℃.
IIIRolling
Steel billet behind the high-pressure water descaling is rolling on the 3000mm roughing mill, 1070 ℃ of start rolling temperatures, the intermediate blank gauge control is at 45mm, and is rolling on the 3300mm finishing mill afterwards, and finishing temperature is controlled at 815 ℃.
IVCooling
Steel plate air cooling to 729 ℃, the beginning water-cooled, the water yield is 160 m
3/ h, water be than 2.2, roller speed 0.95 m/s, and steel plate returns red temperature and is controlled at 350 ℃.
VAligning
With the steel plate aligning, aligning back steel plate roughness is 3mm/1000mm.
VIThe off-line tempering
Steel plate after the side cut takes out steel billet and in air, naturally cools to room temperature normalizing furnace internal heating to 635 ℃ insulation 45 minutes.
VIITensile testing
Steel plate after the tempering carries out tensile testing, and ys Rel is 545MPa, and tensile strength Rm is 655MPa, and unit elongation A is that 22% ,-20 ℃ of ballistic work KV2 are 200J, and steel plate width direction roughness is 5mm/1000mm.Plate property satisfies standard-required.
Claims (3)
1. the method for manufacture of a steel heavy plate for pressure vessels, it comprises following sequential steps:
ISmelt
After hot metal pretreatment, 180 tons of converter top and bottom complex blowings, LF refining and RH outgased, continuous casting became the thick continuously cast bloom of 200～220mm;
IIThe steel billet heating
The steel billet that 200～220mm is thick is incubated 3～4 hours process furnace internal heating to 1200 ℃～1250 ℃;
IIIRolling
Through high-pressure water descaling, the steel billet behind the high-pressure water descaling is rolling on the 3000mm roughing mill, 1050-1080 ℃ of start rolling temperatures, the intermediate blank gauge control is at 45～65mm, and is rolling on 3300 finishing mills afterwards, and finishing temperature is controlled at 800～850 ℃;
IVCooling
Steel plate air cooling to 700～750 ℃, the beginning water-cooled, the water yield is 120～200m
3/ h, the water yield is than 2.0～2.5, roller speed 0.85～0.95m/s, steel plate returns red temperature and is controlled at 320～580 ℃;
VAligning
Steel plate is carried out hot straightening, reach≤6mm/1000mm;
VIThe off-line tempering
Steel plate after the side cut takes out steel billet and in air, naturally cools to room temperature normalizing furnace internal heating to 615 ℃～655 ℃ insulation 40～50 minutes;
VIITensile testing
Steel plate after the tempering carries out tensile testing, and ys Rel is 515～575MPa, and tensile strength is Rm 630～690MPa MPa, and unit elongation A is that 21～25% ,-20 ℃ of ballistic work KV2 are 190～250J, and steel plate width direction roughness is 5mm ± 1/1000mm.
2. the method for manufacture of steel heavy plate for pressure vessels according to claim 1, it is characterized in that: the quality per distribution ratio of the composition of described steel plate is:
C：0.08～0.12，?Si：0.25～0.40， Mn：1.20～1.60， ?P：≤0.010，
S：≤0.005， Ni：0.15～0.40， V：0.02～0.06， Nb：0.02～0.04，
Ti:0.01～0.03, Al:0.01～0.03, O :≤20PPm, N:25～50PPm, all the other are Fe and unavoidable impurities.
3. the method for manufacture of steel heavy plate for pressure vessels according to claim 1, it is characterized in that: the quality per distribution ratio of the composition of described steel plate is:
C：0.08～0.12，?Si：0.25～0.40， Mn：1.20～1.60， P：≤0.010，
S：≤0.005， Ni：0.15～0.40，?V：0.02～0.06， Ti：0.01～0.03，
Al：0.01～0.03，O：≤20PPm，N：25～50PPm，
All the other are Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102236522A CN102747278A (en) | 2012-07-02 | 2012-07-02 | Manufacturing method of steel plate for pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102236522A CN102747278A (en) | 2012-07-02 | 2012-07-02 | Manufacturing method of steel plate for pressure vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102747278A true CN102747278A (en) | 2012-10-24 |
Family
ID=47027764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102236522A Pending CN102747278A (en) | 2012-07-02 | 2012-07-02 | Manufacturing method of steel plate for pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102747278A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014282A (en) * | 2012-12-21 | 2013-04-03 | 首钢总公司 | Production method of high-strength and good-low-temperature-toughness wind power steel plate |
| CN103343298A (en) * | 2013-07-12 | 2013-10-09 | 鞍钢股份有限公司 | Production method of 07MnNiMoDR steel for low-temperature container |
| CN103468903A (en) * | 2013-08-23 | 2013-12-25 | 内蒙古包钢钢联股份有限公司 | Method for improving low-temperature impact toughness of high-strength steel |
| CN103468902A (en) * | 2013-08-23 | 2013-12-25 | 内蒙古包钢钢联股份有限公司 | Method for improving through-thickness characteristics of thickness-specification high-strength steel |
| CN105861924A (en) * | 2016-05-31 | 2016-08-17 | 舞阳钢铁有限责任公司 | Low-alloy 15CrMo steel plate and production method thereof |
| CN106319372A (en) * | 2015-06-29 | 2017-01-11 | 鞍钢股份有限公司 | 345 MPa-grade welded bottle steel and manufacturing method thereof |
| CN108655184A (en) * | 2018-05-11 | 2018-10-16 | 鞍钢股份有限公司 | Control method for shape of steel plate with width of 3500mm or more |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011047A (en) * | 2010-12-13 | 2011-04-13 | 首钢总公司 | Production method of steel plate for pressure vessel with low cost and high performance |
-
2012
- 2012-07-02 CN CN2012102236522A patent/CN102747278A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011047A (en) * | 2010-12-13 | 2011-04-13 | 首钢总公司 | Production method of steel plate for pressure vessel with low cost and high performance |
Non-Patent Citations (3)
| Title |
|---|
| 唐文军等: "Nb对压力容器用高强度B610E组织和性能的影响", 《压力容器》 * |
| 张军等: "Q370R锅炉和压力容器用钢板的研制", 《上海金属》 * |
| 王世森等: "微合金非调质压力容器钢的研究进展", 《钢铁研究》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014282A (en) * | 2012-12-21 | 2013-04-03 | 首钢总公司 | Production method of high-strength and good-low-temperature-toughness wind power steel plate |
| CN103014282B (en) * | 2012-12-21 | 2014-09-17 | 首钢总公司 | Production method of high-strength and good-low-temperature-toughness wind power steel plate |
| CN103343298A (en) * | 2013-07-12 | 2013-10-09 | 鞍钢股份有限公司 | Production method of 07MnNiMoDR steel for low-temperature container |
| CN103468903A (en) * | 2013-08-23 | 2013-12-25 | 内蒙古包钢钢联股份有限公司 | Method for improving low-temperature impact toughness of high-strength steel |
| CN103468902A (en) * | 2013-08-23 | 2013-12-25 | 内蒙古包钢钢联股份有限公司 | Method for improving through-thickness characteristics of thickness-specification high-strength steel |
| CN103468902B (en) * | 2013-08-23 | 2015-04-22 | 内蒙古包钢钢联股份有限公司 | Method for improving through-thickness characteristics of thickness-specification high-strength steel |
| CN103468903B (en) * | 2013-08-23 | 2015-06-03 | 内蒙古包钢钢联股份有限公司 | Method for improving low-temperature impact toughness of high-strength steel |
| CN106319372A (en) * | 2015-06-29 | 2017-01-11 | 鞍钢股份有限公司 | 345 MPa-grade welded bottle steel and manufacturing method thereof |
| CN106319372B (en) * | 2015-06-29 | 2018-12-04 | 鞍钢股份有限公司 | 345 MPa-grade welded bottle steel and manufacturing method thereof |
| CN105861924A (en) * | 2016-05-31 | 2016-08-17 | 舞阳钢铁有限责任公司 | Low-alloy 15CrMo steel plate and production method thereof |
| CN108655184A (en) * | 2018-05-11 | 2018-10-16 | 鞍钢股份有限公司 | Control method for shape of steel plate with width of 3500mm or more |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103602888B (en) | Manufacturing method for low-compression ratio hot-rolled 9Ni steel thick plate | |
| CN102747278A (en) | Manufacturing method of steel plate for pressure vessel | |
| CN103540838B (en) | A kind of Steel plate for low-temperature vessel and production method | |
| CN110295320B (en) | Large-wall-thickness X52MS acid-resistant pipeline steel plate produced by LF-RH refining process and manufacturing method thereof | |
| US20140366602A1 (en) | Method for Manufaturing Thin Strip Continuously Cast 700MPa-Grade High Strength Weather-Resistant Steel | |
| CN107974638B (en) | Manufacturing method of rack steel plate with thickness of 180mm manufactured by continuous casting billet | |
| CN102041367A (en) | Manufacturing method of thin strip continuously cast and cold rolled non-oriented electrical steel | |
| CN112981257B (en) | Economical thick-wall high-strength high-toughness X70M hot-rolled steel plate and manufacturing method thereof | |
| CN102825236B (en) | Method for eliminating transverse crack defect of boron-containing steel continuous casting billet corner | |
| CN103484766B (en) | A kind of 600MPa level hydroelectric project modified high strength and low welding crack sensitivity steel plate and preparation method thereof | |
| CN102581008A (en) | Processing method for producing low-cost high-formability IF (interstitial-free) steel | |
| CN111155028B (en) | Steel plate for normalized DH36 wind power and preparation method thereof | |
| CN110184529A (en) | A kind of middle low-temperature pressure container end socket carbon steel plate and its manufacturing method | |
| WO2022199075A1 (en) | Thin specification nm450 steel plate and manufacturing method therefor | |
| CN105200332A (en) | 700 MPa level thin-gauge high-strength steel strip and production method thereof | |
| CN106755870A (en) | A kind of production method of think gauge medium and high carbon steel sheet material | |
| CN103509925B (en) | A kind of low cost production thereof promoting Q345R steel plate inspection qualification rate | |
| CN113549808A (en) | Production method of rare earth microalloyed Q355B low-alloy high-strength structural steel | |
| CN112522593B (en) | Thin 30CrMo hot rolled steel plate/strip and production method thereof | |
| CN101538680A (en) | Method for producing high-strength steel with yield strength of 600MPa | |
| CN105177416B (en) | A kind of furnace shell heat-resisting steel plate of pressure vessel and its manufacture method | |
| CN106222557B (en) | A kind of high efficiency, low cost 610MPa water power steel and its production method | |
| CN102912231A (en) | Production method for ultrahigh strength steel plate | |
| CN101538681A (en) | Method for producing high-strength steel with yield strength of 700MPa level | |
| CN112126758B (en) | Toughening regulation and control method for super-thick steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121024 |