CN105177426A - Normalizing rolling high-temperature-resistant capacitor plate and production method thereof - Google Patents

Normalizing rolling high-temperature-resistant capacitor plate and production method thereof Download PDF

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Publication number
CN105177426A
CN105177426A CN201510655966.3A CN201510655966A CN105177426A CN 105177426 A CN105177426 A CN 105177426A CN 201510655966 A CN201510655966 A CN 201510655966A CN 105177426 A CN105177426 A CN 105177426A
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China
Prior art keywords
temperature
rolling
cooling
normalizing
steel plate
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Pending
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CN201510655966.3A
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Chinese (zh)
Inventor
刘宝喜
王云阁
陈俊东
梁桂梅
张阔斌
王重军
秦坤
关玉佐
安海玉
郑文超
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Tangshan Iron and Steel Group Co Ltd
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Tangshan Iron and Steel Group Co Ltd
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Priority to CN201510655966.3A priority Critical patent/CN105177426A/en
Publication of CN105177426A publication Critical patent/CN105177426A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a normalizing rolling high-temperature-resistant capacitor plate and a production method thereof. The method comprises the steps of continuous casting, heating, rolling, accelerated cooling control (ACC) cooling and offline cooling in heaps. Molten steel is adopted for continuous casting. The molten steel is composed of, by mass, 0.13%-0.16% of C, 0.40%-0.60% of Mn, 0.17%-0.37% of Si, 0.90%-1.10% of Cr, 0.40%-0.55% of Mo, 0.020%-0.050% of Als, 0.008% of S or the less, 0.015% of P or the less and the balance Fe and inevitable impurities. The high-temperature-resistant capacitor steel plate is produced by optimizing the composition design and improving the technological parameters in work procedures during production, and the requirement for high-temperature mechanical performance of the capacitor steel plate is met; through the technical means like control over the rolling method in the rolling process, the thickness and temperature of secondary rolling starting, the finishing rolling temperature and the finishing cooling temperature and heap cooling treatment on the steel plate, the steel plate has the same mechanical performance level on the premise of not conducting normalizing tempering treatment; the manufacturing cost of the steel plate is reduced and the market competitiveness is improved.

Description

The high-temperature resistant container plate of normalizing rolling and production method thereof
Technical field
The present invention relates to a kind of container class steel plate, especially a kind of high-temperature resistant container plate of normalizing rolling and production method thereof.
Background technology
As container class steel plate, be in most cases in the working order of 300 ~ 500 DEG C, this just needs container panel to have higher resistance to elevated temperatures.The steel plate being applied to high-temperature resistant container class at present, due to Composition Design, needs the thermal treatment process adding normalizing and tempering with hot rolling to produce, there is the weak point of complex procedures, cost intensive, in the serious stagnant situation of steel industry, be unfavorable for market competition.
Summary of the invention
The technical problem to be solved in the present invention is to provide the high-temperature resistant container plate of the low normalizing rolling of a kind of production cost; Present invention also offers a kind of production method of high-temperature resistant container plate of normalizing rolling.
For solving the problems of the technologies described above, the massfraction of chemical composition of the present invention is: C0.13% ~ 0.16%, Mn0.40% ~ 0.60%, Si0.17% ~ 0.37%, Cr0.90% ~ 1.10%, Mo0.40% ~ 0.55%, Als0.020% ~ 0.050%, S≤0.008, P≤0.015, all the other are iron and inevitable impurity.
The thickness specification of container panel of the present invention is 12 ~ 60mm.
The inventive method comprises continuous casting, heating, rolling and ACC cooling and the heap cooling working procedure that rolls off the production line; Adopt molten steel to carry out continuous casting, the massfraction of ladle chemistry is described above.
Rolling described in the inventive method and ACC refrigerating work procedure: adopt 2 passage transverse rollings; Adopt two-stage control rolling, start rolling temperature >=1150 DEG C, intermediate blank controlled rolling thickness adopts 2 ~ 3 times of finished product thicknesses; Secondary start rolling temperature≤960 DEG C, finishing temperature 860 ~ 930 DEG C; After rolling completes, steel plate enters ACC section cooling.In described ACC section cooling, the final cooling temperature of steel plate is 650 ~ 750 DEG C.
Roll off the production line described in the inventive method heap cooling working procedure: cooling in heap temperature t >=200 DEG C of 12 ~ 30mm thickness specification steel plate, heap cool time >=24 hour; Cooling in heap temperature t >=300 DEG C of 30 ~ 60mm thickness specification steel plate, heap cool time >=48 hour.
Heating process described in the inventive method: soaking zone temperature 1220 ~ 1250 DEG C.In described heating process, preheating section temperature 830 ~ 970 DEG C, one section of Heating temperature 1000 ~ 1080 DEG C, two sections of Heating temperatures 1230 ~ 126 DEG C.
The beneficial effect adopting technique scheme to produce is: the present invention adds the alloying elements such as Cr, Mo in steel plate composition, and like this, production process does not need thermal treatment can obtain the excellent container panel of resistance to elevated temperatures; There is the feature of low, the easy production of cost, and excellent resistance to elevated temperatures.
The inventive method, by optimizing Composition Design, improving the processing parameter of each operation in producing, is produced for the manufacture of high-temperature resistant container steel plate, is met the high-temperature mechanical property requirement of tank plate; And by the control to the thickness of the rolling method in the operation of rolling, secondary open rolling and temperature, finishing temperature, final cooling temperature, and the technique means such as heap deepfreeze are carried out to steel plate, make steel plate under the prerequisite of not carrying out normalizing and tempering process, there is same mechanical property levels; Be conducive to the manufacturing cost reducing steel plate, improve the market competitiveness.
Embodiment
The production method of the high-temperature resistant container plate of this normalizing rolling adopts following processing step:
(1) steel making working procedure: comprise blast furnace ironmaking, hot metal pretreatment, converter smelting and LF refining process.Described Hot Metal Pretreatment, reduces the sulphur content≤0.020wt% in molten iron.Described converter steelmaking process, adopts double slag process operation, reduces phosphorus content≤0.015wt% in steel; Adopt Mo-Fe to add converter together with steel scrap, it is element alloyed to carry out Mo; Add low-carbon (LC) Cr-Fe alloy by converter feed bin, it is element alloyed to carry out Cr.Described LF refining process, to reduce in steel sulphur content to≤0.008wt%; And carry out the fine setting of steel grade chemical composition; The massfraction controlling chemical composition in molten steel is: C0.13% ~ 0.16%, Mn0.40% ~ 0.60%, Si0.17% ~ 0.37%, Cr0.90% ~ 1.10%, Mo0.40% ~ 0.55%, Als0.020% ~ 0.050%, S≤0.008, P≤0.015, all the other are iron and inevitable impurity.
(2) continuous casting working procedure: adopt induction stirring at secondary cooling zone, produce thick column crystal to reduce in strand; Simultaneously under solidification end adopts dynamic weight, smash columanar structure, make continuous casting billet structure fine and close, in the operation of rolling, the organizational controls of steel provides favourable condition.
(3) heating process: preheating section temperature 830 ~ 970 DEG C, one section of Heating temperature 1000 ~ 1080 DEG C, two sections of Heating temperatures 1230 ~ 1260 DEG C, soaking zone temperature 1220 ~ 1250 DEG C;
(4) rolling and ACC refrigerating work procedure: adopt 2 passage transverse rollings, to reduce the anisotropy of steel plate mechanical property; Adopt two-stage control rolling, start rolling temperature >=1150 DEG C, intermediate blank controlled rolling thickness adopts 2 ~ 3 times of finished product thicknesses; Secondary start rolling temperature≤960 DEG C, finishing temperature 860 ~ 930 DEG C; After rolling completes, steel plate enters ACC section cooling, and controlling final cooling temperature is 650 ~ 750 DEG C.
(5) roll off the production line heap cooling working procedure: according to the thickness of finished steel plate, controls roll off the production line cooling in heap temperature t and heap cool time; 12≤thickness < 30mm thickness specification t >=200 DEG C, heap cool time >=24 hour; 30≤thickness≤60mm thickness specification t >=300 DEG C, heap cool time >=48 hour.After cooling in heap, described container panel can be obtained.
The suitable thicknesses specification of aforesaid method gained container panel is 12 ~ 60mm, and normal temperature mechanical property is: tensile strength 450 ~ 590MPa, yield strength >=295MPa, unit elongation >=19; Its high-temperature mechanical property is in table 1.
Table 1: the high-temperature mechanical property of this container panel
Below in conjunction with specific embodiment, the present invention is further detailed explanation, and in each embodiment, the chemical composition of container panel is in table 2.
Table 2: the chemical composition (wt%) of each embodiment container panel
In table 2, the surplus of chemical composition is iron and inevitable impurity.
Embodiment 1: the concrete technology of the production method of the high-temperature resistant container plate of this normalizing rolling is as described below.
Strand size 220*2000*3300mm, preheating section temperature 950 DEG C, one section of Heating temperature 1050 DEG C, two sections of Heating temperatures 1260 DEG C, soaking zone temperature 1250 DEG C, tapping temperature 1245 DEG C.Adopt two benches controlled rolling, start rolling temperature 1170 DEG C, workpiece thickness 36mm; Secondary start rolling temperature 960 DEG C, finishing temperature 860 ~ 890 DEG C; Final cooling temperature 656 DEG C.The cooling in heap temperature that rolls off the production line 200 DEG C, heap cool time 24 hours; The container panel that thickness is 12mm can be obtained.
Embodiment 2: the concrete technology of the production method of the high-temperature resistant container plate of this normalizing rolling is as described below.
Strand size 220*2000*3000mm, preheating section temperature 970 DEG C, one section of Heating temperature 1070 DEG C, two sections of Heating temperatures 1250 DEG C, soaking zone temperature 1240 DEG C, tapping temperature 1233 DEG C.Adopt two benches controlled rolling, start rolling temperature 1166 DEG C, workpiece thickness 80mm; Secondary start rolling temperature 920 DEG C, finishing temperature 900 ~ 930 DEG C; Final cooling temperature 703 DEG C.The cooling in heap temperature that rolls off the production line 354 DEG C, heap cool time 48 hours; The container panel that thickness is 40mm can be obtained.
Embodiment 3: the concrete technology of the production method of the high-temperature resistant container plate of this normalizing rolling is as described below.
Strand size 220*2000*2900mm, preheating section temperature 900 DEG C, one section of Heating temperature 1020 DEG C, two sections of Heating temperatures 1240 DEG C, soaking zone temperature 1243 DEG C, tapping temperature 1238 DEG C.Adopt two benches controlled rolling, start rolling temperature 1162 DEG C, workpiece thickness 60.2mm; Secondary start rolling temperature 905 DEG C, finishing temperature 893 ~ 922 DEG C; Final cooling temperature 723 DEG C.The cooling in heap temperature that rolls off the production line 220 DEG C, heap cool time 30 hours; The container panel that thickness is 28mm can be obtained.
Embodiment 4: the concrete technology of the production method of the high-temperature resistant container plate of this normalizing rolling is as described below.
Strand size 250*2000*2900mm, preheating section temperature 880 DEG C, one section of Heating temperature 1000 DEG C, two sections of Heating temperatures 1245 DEG C, soaking zone temperature 1223 DEG C, tapping temperature 1218 DEG C.Adopt two benches controlled rolling, start rolling temperature 1150 DEG C, workpiece thickness 150.1mm; Secondary start rolling temperature 915 DEG C, finishing temperature 890 ~ 912 DEG C; Final cooling temperature 743 DEG C.The cooling in heap temperature that rolls off the production line 324 DEG C, heap cool time 50 hours; The container panel that thickness is 60mm can be obtained.
Embodiment 5: the concrete technology of the production method of the high-temperature resistant container plate of this normalizing rolling is as described below.
Strand size 250*2000*2900mm, preheating section temperature 830 DEG C, one section of Heating temperature 1040 DEG C, two sections of Heating temperatures 1230 DEG C, soaking zone temperature 1220 DEG C.Adopt two benches controlled rolling, start rolling temperature 1165 DEG C, workpiece thickness 125mm; Secondary start rolling temperature 900 DEG C, finishing temperature 870 ~ 900 DEG C; Final cooling temperature 650 DEG C.The cooling in heap temperature that rolls off the production line 300 DEG C, heap cool time 60 hours; The container panel that thickness is 50mm can be obtained.
Embodiment 6: the concrete technology of the production method of the high-temperature resistant container plate of this normalizing rolling is as described below.
Strand size 250*2000*2900mm, preheating section temperature 900 DEG C, one section of Heating temperature 1080 DEG C, two sections of Heating temperatures 1250 DEG C, soaking zone temperature 1230 DEG C.Adopt two benches controlled rolling, start rolling temperature 1180 DEG C, workpiece thickness 55mm; Secondary start rolling temperature 945 DEG C, finishing temperature 890 ~ 920 DEG C; Final cooling temperature 750 DEG C.The cooling in heap temperature that rolls off the production line 270 DEG C, heap cool time 28 hours; The container panel that thickness is 22mm can be obtained.
Comparative example: the thermal treatment gained container panel of embodiment 1,2,3,4 being carried out respectively to 900 DEG C of normalizings+650 DEG C of tempering, detect embodiment 1-6 and comparative example 1-4, mechanical property detected result is in table 3, and high temperature tensile properties detected result is in table 4.
Table 3: the mechanical property of embodiment and comparative example
Table 4: the high temperature tensile properties of embodiment and comparative example
From table 3, table 4, present method does not carry out normalizing and tempering process, can reach same mechanical property levels and high temperature tensile properties level.

Claims (8)

1. the high-temperature resistant container plate of a normalizing rolling, it is characterized in that, the massfraction of its chemical composition is: C0.13% ~ 0.16%, Mn0.40% ~ 0.60%, Si0.17% ~ 0.37%, Cr0.90% ~ 1.10%, Mo0.40% ~ 0.55%, Als0.020% ~ 0.050%, S≤0.008, P≤0.015, all the other are iron and inevitable impurity.
2. the high-temperature resistant container plate of normalizing rolling according to claim 1, is characterized in that: the thickness specification of described container panel is 12 ~ 60mm.
3. a production method for the high-temperature resistant container plate of normalizing rolling, is characterized in that: it comprises continuous casting, heating, rolling and ACC cooling and the heap cooling working procedure that rolls off the production line; Adopt molten steel to carry out continuous casting, the massfraction of ladle chemistry is: C0.13% ~ 0.16%, Mn0.40% ~ 0.60%, Si0.17% ~ 0.37%, Cr0.90% ~ 1.10%, Mo0.40% ~ 0.55%, Als0.020% ~ 0.050%, S≤0.008, P≤0.015, all the other are iron and inevitable impurity.
4. the production method of the high-temperature resistant container plate of normalizing rolling according to claim 3, is characterized in that, described rolling and ACC refrigerating work procedure: adopt 2 passage transverse rollings; Adopt two-stage control rolling, start rolling temperature >=1150 DEG C, intermediate blank controlled rolling thickness adopts 2 ~ 3 times of finished product thicknesses; Secondary start rolling temperature≤960 DEG C, finishing temperature 860 ~ 930 DEG C; After rolling completes, steel plate enters ACC section cooling.
5. the production method of the high-temperature resistant container plate of normalizing rolling according to claim 4, is characterized in that: in described ACC section cooling, and the final cooling temperature of steel plate is 650 ~ 750 DEG C.
6. the production method of the high-temperature resistant container plate of normalizing rolling according to claim 3, is characterized in that, described in roll off the production line heap cooling working procedure: cooling in heap temperature t >=200 DEG C of 12 ~ 30mm thickness specification steel plate, heap cool time >=24 hour; Cooling in heap temperature t >=300 DEG C of 30 ~ 60mm thickness specification steel plate, heap cool time >=48 hour.
7. the production method of the high-temperature resistant container plate of the normalizing rolling according to claim 3-6 any one, is characterized in that, described heating process: soaking zone temperature 1220 ~ 1250 DEG C.
8. the production method of the high-temperature resistant container plate of normalizing rolling according to claim 7, is characterized in that: in described heating process, preheating section temperature 830 ~ 970 DEG C, one section of Heating temperature 1000 ~ 1080 DEG C, two sections of Heating temperatures 1230 ~ 126 DEG C.
CN201510655966.3A 2015-10-13 2015-10-13 Normalizing rolling high-temperature-resistant capacitor plate and production method thereof Pending CN105177426A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106755870A (en) * 2017-01-11 2017-05-31 唐山钢铁集团有限责任公司 A kind of production method of think gauge medium and high carbon steel sheet material
CN109852890A (en) * 2019-04-09 2019-06-07 鞍钢股份有限公司 A method of improving oil transportation pipeline L450M steel plate low-temperature flexibility

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013086134A (en) * 2011-10-19 2013-05-13 Nippon Steel & Sumitomo Metal Corp Welded joint and welding material
CN103160728A (en) * 2013-03-16 2013-06-19 南阳汉冶特钢有限公司 High-yield-strength S890QL structural steel medium plate and production method thereof
CN103725964A (en) * 2013-12-30 2014-04-16 南阳汉冶特钢有限公司 Novel low alloy steel Q345 series extra-thick steel plate and production method thereof
CN104662193A (en) * 2012-09-19 2015-05-27 杰富意钢铁株式会社 Wear-resistant steel plate having excellent low-temperature toughness and corrosion wear resistance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013086134A (en) * 2011-10-19 2013-05-13 Nippon Steel & Sumitomo Metal Corp Welded joint and welding material
CN104662193A (en) * 2012-09-19 2015-05-27 杰富意钢铁株式会社 Wear-resistant steel plate having excellent low-temperature toughness and corrosion wear resistance
CN103160728A (en) * 2013-03-16 2013-06-19 南阳汉冶特钢有限公司 High-yield-strength S890QL structural steel medium plate and production method thereof
CN103725964A (en) * 2013-12-30 2014-04-16 南阳汉冶特钢有限公司 Novel low alloy steel Q345 series extra-thick steel plate and production method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106755870A (en) * 2017-01-11 2017-05-31 唐山钢铁集团有限责任公司 A kind of production method of think gauge medium and high carbon steel sheet material
CN109852890A (en) * 2019-04-09 2019-06-07 鞍钢股份有限公司 A method of improving oil transportation pipeline L450M steel plate low-temperature flexibility

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Application publication date: 20151223