CN104878294A - P440NL1 steel plate for oil groove tank car and production method of P440NL1 steel plate - Google Patents
P440NL1 steel plate for oil groove tank car and production method of P440NL1 steel plate Download PDFInfo
- Publication number
- CN104878294A CN104878294A CN201510257954.5A CN201510257954A CN104878294A CN 104878294 A CN104878294 A CN 104878294A CN 201510257954 A CN201510257954 A CN 201510257954A CN 104878294 A CN104878294 A CN 104878294A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- p440nl1
- tank car
- temperature
- oil groove
- 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 invention discloses a P440NL1 steel plate for an oil groove tank car and a production method of the P440NL1 steel plate. The P440NL1 steel plate for the oil groove tank car comprises the following chemical components in percent by weight: 0.14-0.24% of C, 0.15-0.50% of Si, 1.30-1.65% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, less than or equal to 0.30% of Cu, 0.020-0.10% of V, 0.005-0.020% of Nb, less than or equal to 0.40% of Ni, 0.020-0.050% of Al, less than or equal to 0.53% of Cev and the balance of Fe and inevitable impurities. The P440NL1 steel plate for the oil groove tank car has the advantages that Cu-V-Ni design thought is adopted in composition design, the carbon content is high, the micro-alloy content is relatively low, and the cost is low; strength-toughness matching is realized, the yield strength is above 505MPa, the tensile strength is about 650-690MPa, and the intra-plate gauge deviation of the P440NL1 steel plate is relatively small; the lateral absorbed energy at the temperature of -60 DEG C is more than 100J, and the low temperature toughness is good; detection shows that the conventional mechanical properties and high temperature die welding properties of the P440NL1 steel plate meet the following requirements: Rp0.2 is more than or equal to 460MPa, Rm is more than or equal to 630MPa, A50 is more than or equal to 22%, and the lateral absorbed energy at the temperature of -60 DEG C is more than or equal to 27J; the mechanical properties of the P440NL1 steel plate completely meet standard requirements of steel for a tank car on P440NL1 steel, and the affluence is quite high; meanwhile, the content of added precious metals is low, so that the production cost is relatively low.
Description
Technical field
The present invention relates to a kind of tank car steel, especially a kind of oil groove tank car P440NL1 steel plate and production method thereof.
Background technology
From the sixties in 20th century, what the tank body steel of China's liquefied gas truck tank adopted mostly is the Q345R steel (tensile strength Rm is 500MPa level) that intensity rank is lower, cause tank body wall thickness thicker, cause that existing truck tank ratio of light weight to loading capacity is large, volume to weight ratio is little, delivery efficiency is low, thus limit maximization (high-parameters) development of domestic liquefied gas truck tank.Compared with Foreign Advanced Lerel, the ratio of light weight to loading capacity of China's truck tank compares the about high by 30% of the advanced country such as Japan and America and Europe.Therefore, thinning, reduce tank body weight and improve armor plate strength, be a direction of China tank car exploitation.
P440NL1 steel plate is a kind of high-strength micro-alloy type oil groove plate, and tensile strength, at more than 630Mpa, is mainly used in the end socket position of oil groove tank car.There is the weak point that production difficulty is large, price is higher and can only ensure-40 DEG C of transverse impact merits in existing P440NL1 steel plate.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of low cost, high performance oil groove tank car P440NL1 steel plate; Present invention also offers a kind of production method of oil groove tank car P440NL1 steel plate.
For solving the problems of the technologies described above, the present invention is made up of the chemical composition of following weight percent: C 0.14% ~ 0.24%, Si 0.15% ~ 0.50%, Mn 1.30% ~ 1.65%, P≤0.015%, S≤0.005%, Cu≤0.30%, V 0.020% ~ 0.10%, Nb 0.005% ~ 0.020%, Ni≤0.40%, Al 0.020% ~ 0.050%, Cev≤0.53%, surplus is Fe and inevitable impurity.
The tissue of steel plate of the present invention is mainly ferrite, perlite and bainite.
The present invention adopts Cu-V-Ni system microalloy element complex intensifying, has good obdurability coupling and welding property.The development of high-strength steel is the process progressively reducing carbon content, the reduction of carbon content, is conducive to the toughness improving steel on the one hand, can improves the welding property of steel on the other hand significantly; In the present invention, C content is 0.14 ~ 0.24%, is suitable for the large-scale steel structure members of the needs more stressed complexity of high tenacity and welding property.Cu appropriate in the present invention can make steel plate sample after long-time die welding process, precipitation strength steel matrix; Thus it is too fast to avoid steel mould as deposited strength index to decline.In the present invention, V content is at 0.02 ~ 0.10%, V after controlled rolling, and C, N compound of V is separated out, and can strongly improve steel plate and obtain intensity.Add in the present invention and have a small amount of Nb, be conducive to controlled rolling, reduce the size of C, N compound precipitate of V.Adding of Ni element, steel plate toughness can be improved.Cev=C+Mn/6+ (Cr+Mo+V) in the present invention/5+ (Ni+Cu)/15.In the present invention, impurity element P, S equal size lower limit does not limit, and reduces as far as possible under processing unit ability, to reach the uniform object of the pure mechanical property of steel.
The inventive method comprises heating, rolling and heat treatment step, and described heating process adopts the steel billet of the chemical composition of above-mentioned weight percentage;
Described heat treatment step: Heating temperature 880 DEG C ± 10 DEG C, total heat-up time 30min ~ 50min; After normalizing, steel plate is through air-cooled process 10min ~ 20min.
Heating process described in the inventive method: maximum heating temperature≤1240 DEG C, rate of heating >=1.2min/mm, soaking zone temperature 1220 DEG C ~ 1240 DEG C, soaking zone heat-up time >=90min.
Rolling process described in the inventive method: adopt II type controlled rolling process; First stage rolling is between 950 DEG C ~ 1100 DEG C, and accumulative draft >=70%, to ensure steel plate not wooden dipper song; Start rolling temperature≤900 DEG C of subordinate phase, finishing temperature≤820 DEG C, accumulative draft >=30%; Roll rear steel plate to cool fast, red temperature 650 DEG C ~ 700 DEG C.
The beneficial effect adopting technique scheme to produce is: the present invention adopts the mentality of designing of Cu-V-Ni on Composition Design, and high-carbon, microalloy content are lower, and with low cost; Tough coupling, yield strength is at more than 505MPa, and tensile strength is at about 650 ~ 690MPa, and steel plate is less with plate difference;-60 DEG C of transverse impact merits are greater than 100 joules, and low-temperature flexibility is good; The conventional mechanical property of steel plate of the present invention and high temperature die welding performance reach following requirements after testing: Rp0.2 >=460MPa, Rm >=630MPa, A50 >=22% ,-60 horizontal DEG C >=27J.Mechanical property of steel plate of the present invention meet completely tank car steel to the standard-required of P440NL1 steel and have sizable affluence amount; And the noble metal content added is few, and production cost is lower.
The steel plate chemical composition design of the inventive method adopts cheap carbon, manganese solution strengthening, the precipitation strength effect of copper, by reasonable heat treating regime, obtain ferrite, pearlitic structure and a certain proportion of bainite, surface of steel plate bainite layer is few, and grain fineness number 9 grades, with first-class requirement, solves high strength, high impact toughness and steel plate hot shaping after strength problem, impact temperature reaches-60 DEG C.The inventive method guarantees the good and template of mechanical property of steel plate under less precious alloy usage quantity condition, and steel plate thickness allowance control is accurate, at-0.7mm ~+0.3mm, and steel plate thickness≤25.4mm; Make steel plate have good tissue, over-all properties and welding property, and technique is simple, easy handling.
The inventive method adopts Cu-V-Ni system microalloy element complex intensifying, through rational thermal treatment process, obtains good obdurability coupling, does not reduce again the welding property of steel plate simultaneously.The inventive method is adopted to carry out producing the chemical composition design achieving lower carbon equivalent and microalloy content, strict control strand heating, rolling and cooling parameter, steel plate is after normalizing treatment, both the every mechanical performance index having obtained technical qualification requirement again reduces production cost, obtains more tiny weave construction and the welding property of Geng Jia simultaneously.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is steel plate of the present invention 100 microns of macrograph;
Fig. 2 is steel plate of the present invention 20 microns of macrograph;
Fig. 3 is the as-welded 100 microns of macrograph of steel mould of the present invention;
Fig. 4 is the as-welded 20 microns of macrograph of steel mould of the present invention.
Embodiment
Embodiment 1: this oil groove tank car P440NL1 steel plate adopts following method to produce.
(1) chemical composition (weight) of steel billet is: C 0.14%, Si 0.32%, Mn 1.52%, P 0.012%, S 0.002%, Cu 0.25%, V 0.075%, Nb 0.020%, Ni 0.16%, Al 0.032%, Cev 0.44%, surplus is Fe and is inevitably mingled with.In order to avoid bursting appears in Hi-Stren steel base surface, steel billet requires stacking more than 24 hours, to discharge stress.
(2) this P440NL1 steel plate thickness is 20mm, adopts following processing step to produce:
A, heating process: steel billet is through stacking shove charge after 30 hours; Low temperature slow heat, maximum heating temperature 1240 DEG C, ensures that steel billet burns evenly thoroughly, rate of heating 1.5min/mm, soaking zone temperature 1220 DEG C ~ 1240 DEG C, soaking zone 120min heat-up time, ensures that ingot blank burns evenly thoroughly.
B, rolling process: adopt II type controlled rolling process; First stage rolling is at 1080 DEG C, and this stage most of reduction in pass is 20%, and accumulative draft 80%, makes austenite generation perfect recrystallization, with fining austenite grains; Subordinate phase is the austenite non-recrystallize stage, start rolling temperature 900 DEG C, finishing temperature 810 DEG C, accumulative draft 35%; Roll rear steel plate to enter ACC and cool fast, red temperature 670 DEG C.
Walk shear line after C, steel plate roll, excision steel plate is bilateral.
D, heat treatment step: Heating temperature 890 DEG C, total heat-up time 35min; After normalizing, steel plate, through air-cooled process 10min, can obtain described P440NL1 steel plate.
Fig. 1 is shown in by the organization chart of this P440NL1 steel plate, 2; Be organized as perlite+ferrite+bainite+martensite (a small amount of, be distributed in banded structure) from Fig. 1 and Fig. 2, this P440NL1 steel plate, homogeneous microstructure, the grain fineness number of tissue is about 9.5 grades.
The conventional mechanical property of this P440NL1 steel plate: yield strength 530MPa; Tensile strength: 665MPa; Extend: 32%;-60 DEG C of ballistic work AKV(are laterally) 113,109,102J.The steel plate die welding performance of this P440NL1 steel plate: yield strength 456MPa; Tensile strength: 590MPa; Extend: 34%;-60 DEG C of ballistic work AKV(are laterally) 112J, 122J, 134J.
Fig. 3, Fig. 4 are the macrograph of this P440NL1 steel mould as-welded 100 microns and 20 microns, and from photo, steel plate is after die welding thermal treatment, and steel plate is organized as perlite+ferrite+tempering bainite, homogeneous microstructure, and the grain fineness number of tissue is about 9.5 grades.
Embodiment 2: this oil groove tank car P440NL1 steel plate adopts following method to produce.
(1) chemical composition (weight) of steel billet is: C 0.16%, Si 0.37%, Mn 1.55%, P 0.011%, S 0.004%, Cu 0.18%, V 0.070%, Nb 0.017%, Ni 0.38%, Al 0.020%, Cev 0.44%, surplus is Fe and is inevitably mingled with.In order to avoid bursting appears in Hi-Stren steel base surface, steel billet requires stacking more than 24 hours, to discharge stress.
(2) this P440NL1 steel plate thickness is 10mm, adopts following processing step to produce:
A, heating process: steel billet is through stacking shove charge after 30 hours; Low temperature slow heat, maximum heating temperature 1235 DEG C, ensures that steel billet burns evenly thoroughly, rate of heating 1.6min/mm, soaking zone temperature 1220 DEG C ~ 1230 DEG C, soaking zone 100min heat-up time, ensures that ingot blank burns evenly thoroughly.
B, rolling process: adopt II type controlled rolling process; First stage rolling is at 1100 DEG C, and this stage most of reduction in pass is 25%, and accumulative draft 75%, makes austenite generation perfect recrystallization, with fining austenite grains; Subordinate phase is the austenite non-recrystallize stage, start rolling temperature 900 DEG C, finishing temperature 820 DEG C, accumulative draft 40%.Roll rear steel plate to enter ACC and cool fast, red temperature 700 DEG C.
Walk shear line after C, steel plate roll, excision steel plate is bilateral.
D, heat treatment step: Heating temperature 870 DEG C, total heat-up time 40min; After normalizing, steel plate, through air-cooled process 20min, can obtain described P440NL1 steel plate.
This P440NL1 steel plate be organized as perlite+ferrite+bainite+martensite (a small amount of, be distributed in banded structure), homogeneous microstructure, the grain fineness number of tissue is about 9.5 grades; The conventional mechanical property of steel plate: yield strength 535MPa; Tensile strength: 671MPa; Extend: 31%;-60 DEG C of ballistic work AKV(are laterally) 108,112,109J
This P440NL1 steel plate is after die welding thermal treatment, and steel plate is organized as perlite+ferrite+tempering bainite, homogeneous microstructure, and the grain fineness number of tissue is about 9.5 grades; The steel plate die welding performance of steel plate: yield strength 526MPa; Tensile strength: 665MPa; Extend: 34%;-60 DEG C of ballistic work AKV(are laterally) 102J, 119J, 124J.
Embodiment 3: this oil groove tank car P440NL1 steel plate adopts following method to produce.
(1) chemical composition (weight) of steel billet is: C 0.20%, Si 0.40%, Mn 1.45%, P 0.008%, S 0.005%, Cu 0.14%, V 0.055%, Nb 0.010%, Ni 0.22%, Al 0.050%, Cev 0.46%, surplus is Fe and is inevitably mingled with.In order to avoid bursting appears in Hi-Stren steel base surface, steel billet requires stacking more than 24 hours, release stress.
(2) this P440NL1 steel plate thickness is 14.6mm, adopts following processing step to produce:
A, heating process: steel billet is through stacking shove charge after 30 hours; Low temperature slow heat, maximum heating temperature 1240 DEG C, ensures that steel billet burns evenly thoroughly, rate of heating 1.2min/mm, soaking zone temperature 1225 DEG C ~ 1240 DEG C, soaking zone 150min heat-up time, ensures that ingot blank burns evenly thoroughly.
B, rolling process: adopt II type controlled rolling process; First stage rolling is at 950 DEG C, and this stage most of reduction in pass is 15%, and accumulative draft 70%, makes austenite generation perfect recrystallization, with fining austenite grains; Subordinate phase is the austenite non-recrystallize stage, start rolling temperature 850 DEG C, finishing temperature 780 DEG C, accumulative draft 45%.Roll rear steel plate to enter ACC and cool fast, red temperature 650 DEG C.
Walk shear line after C, steel plate roll, excision steel plate is bilateral.
D, heat treatment step: Heating temperature 870 DEG C, total heat-up time 45min; After normalizing, steel plate, through air-cooled process 15min, can obtain described P440NL1 steel plate.
This P440NL1 steel plate be organized as perlite+ferrite+bainite+martensite (a small amount of, be distributed in banded structure), homogeneous microstructure, the grain fineness number of tissue is about 10.5 grades; The conventional mechanical property of steel plate: yield strength 535MPa; Tensile strength: 680MPa; Extend: 30%;-60 DEG C of ballistic work AKV(are laterally) 113,99,92J.
This P440NL1 steel plate is after die welding thermal treatment, and steel plate is organized as perlite+ferrite+tempering bainite, homogeneous microstructure, and the grain fineness number of tissue is about 10.0 grades; The steel plate die welding performance of steel plate: yield strength 556MPa; Tensile strength: 690MPa; Extend: 34%;-60 DEG C of ballistic work AKV(are laterally) 112J, 122J, 134J.
Embodiment 4: this oil groove tank car P440NL1 steel plate adopts following method to produce.
(1) chemical composition (weight) of steel billet is: C 0.19%, Si 0.15%, Mn 1.65%, P 0.010%, S 0.001%, Cu 0.30%, V 0.045%, Nb 0.020%, Ni 0.27%, Al 0.042%, Cev 0.50%, surplus is Fe and is inevitably mingled with.In order to avoid bursting appears in Hi-Stren steel base surface, steel billet requires stacking more than 24 hours, release stress.
(2) this P440NL1 steel plate thickness is 8mm, adopts following processing step to produce:
A, heating process: steel billet is through stacking shove charge after 30 hours; Low temperature slow heat, maximum heating temperature 1240 DEG C, ensures that steel billet burns evenly thoroughly, rate of heating 1.8min/mm, soaking zone temperature 1220 DEG C ~ 1240 DEG C, soaking zone 90min heat-up time, ensures that ingot blank burns evenly thoroughly.
B, rolling process: adopt II type controlled rolling process; First stage rolling is at 1000 DEG C, and this stage most of reduction in pass is 10%, and accumulative draft 85%, makes austenite generation perfect recrystallization, with fining austenite grains; Subordinate phase is the austenite non-recrystallize stage, start rolling temperature 840 DEG C, finishing temperature 750 DEG C, accumulative draft 30%.Roll rear steel plate to enter ACC and cool fast, red temperature 660 DEG C.
Walk shear line after C, steel plate roll, excision steel plate is bilateral.
D, heat treatment step: Heating temperature 880 DEG C, total heat-up time 50min; After normalizing, steel plate, through air-cooled process 10min, can obtain described P440NL1 steel plate.
This P440NL1 steel plate be organized as perlite+ferrite+bainite+martensite (a small amount of, be distributed in banded structure), homogeneous microstructure, the grain fineness number of tissue is about 10.0 grades; The conventional mechanical property of steel plate: yield strength 552MPa; Tensile strength: 655MPa; Extend: 30%;-60 DEG C of ballistic work AKV(are laterally) 63,89,92J.
This P440NL1 steel plate is after die welding thermal treatment, and steel plate is organized as perlite+ferrite+tempering bainite, homogeneous microstructure, and the grain fineness number of tissue is about 9.5 grades; The steel plate die welding performance of steel plate: yield strength 538MPa; Tensile strength: 670MPa; Extend: 34%;-60 DEG C of ballistic work AKV(are laterally) 102J, 92J, 114J.
Embodiment 5: this oil groove tank car P440NL1 steel plate adopts following method to produce.
(1) chemical composition (weight) of steel billet is: C 0.24%, Si 0.24%, Mn 1.30%, P 0.009%, S 0.003%, Cu 0.20%, V 0.10%, Nb 0.005%, Ni 0.32%, Al 0.028%, Cev 0.51%, surplus is Fe and is inevitably mingled with.In order to avoid bursting appears in Hi-Stren steel base surface, steel billet requires stacking more than 24 hours, release stress.
(2) this P440NL1 steel plate thickness is 25.4mm, adopts following processing step to produce:
A, heating process: steel billet is through stacking shove charge after 36 hours; Low temperature slow heat, maximum heating temperature 1230 DEG C, ensures that steel billet burns evenly thoroughly, rate of heating 1.4min/mm, soaking zone temperature 1220 DEG C ~ 1230 DEG C, soaking zone 120min heat-up time, ensures that ingot blank burns evenly thoroughly.
B, rolling process: adopt II type controlled rolling process; First stage rolling is at 980 DEG C, and this stage adds up draft 72%, makes austenite generation perfect recrystallization, with fining austenite grains; Subordinate phase is the austenite non-recrystallize stage, start rolling temperature 820 DEG C, finishing temperature 740 DEG C, accumulative draft 30%.Roll rear steel plate to enter ACC and cool fast, red temperature 680 DEG C.
Walk shear line after C, steel plate roll, excision steel plate is bilateral.
D, heat treatment step: Heating temperature 885 DEG C, total heat-up time 30min; After normalizing, steel plate, through air-cooled process 12min, can obtain described P440NL1 steel plate.
This P440NL1 steel plate be organized as perlite+ferrite+bainite+martensite (a small amount of, be distributed in banded structure), homogeneous microstructure, the grain fineness number of tissue is about 10.5 grades; The conventional mechanical property of steel plate: yield strength 542MPa; Tensile strength: 640MPa; Extend: 32%;-60 DEG C of ballistic work AKV(are laterally) 83,81,90J.
This P440NL1 steel plate is after die welding thermal treatment, and steel plate is organized as perlite+ferrite+tempering bainite, homogeneous microstructure, and the grain fineness number of tissue is about 9.5 grades; The steel plate die welding performance of steel plate: yield strength 552MPa; Tensile strength: 675MPa; Extend: 31%;-60 DEG C of ballistic work AKV(are laterally) 99J, 98J, 110J.
Embodiment 6: this oil groove tank car P440NL1 steel plate adopts following method to produce.
(1) chemical composition (weight) of steel billet is: C 0.22%, Si 0.50%, Mn 1.39%, P 0.015%, S 0.002%, Cu 0.16%, V 0.020%, Nb 0.013%, Ni 0.40%, Al 0.037%, Cev 0.49%, surplus is Fe and is inevitably mingled with.In order to avoid bursting appears in Hi-Stren steel base surface, steel billet requires stacking more than 24 hours, release stress.
(2) this P440NL1 steel plate thickness is 25.4mm, adopts the processing step identical with embodiment 1 to produce.
This P440NL1 steel plate be organized as perlite+ferrite+bainite+martensite (a small amount of, be distributed in banded structure), homogeneous microstructure, the grain fineness number of tissue is about 10.0 grades; The conventional mechanical property of steel plate: yield strength 532MPa; Tensile strength: 625MPa; Extend: 30%;-60 DEG C of ballistic work AKV(are laterally) 78,91,90J.
This P440NL1 steel plate is after die welding thermal treatment, and steel plate is organized as perlite+ferrite+tempering bainite, homogeneous microstructure, and the grain fineness number of tissue is about 10 grades; The steel plate die welding performance of steel plate: yield strength 556MPa; Tensile strength: 660MPa; Extend: 32%;-60 DEG C of ballistic work AKV(are laterally) 122J, 102J, 117J.
In above-described embodiment, the steel mould degree of being welded during steel plate die welding Performance Detection is: tempering 600 DEG C, is incubated 60 minutes, steel plate sample charging temperature≤400 DEG C.Furnace temperature is 427 DEG C ~ 600 DEG C time, and heat-up rate≤200 DEG C/h, 600 DEG C ~ 427 DEG C cooling rate≤260 DEG C/h, to come out of the stove air cooling with lower steel plate for 427 DEG C.
Claims (5)
1. an oil groove tank car P440NL1 steel plate, is characterized in that, it is made up of the chemical composition of following weight percent: C 0.14% ~ 0.24%, Si 0.15% ~ 0.50%, Mn 1.30% ~ 1.65%, P≤0.015%, S≤0.005%, Cu≤0.30%, V 0.020% ~ 0.10%, Nb 0.005% ~ 0.020%, Ni≤0.40%, Al 0.020% ~ 0.050%, Cev≤0.53%, surplus is Fe and inevitable impurity.
2. oil groove tank car P440NL1 steel plate according to claim 1, is characterized in that: the tissue of described steel plate is mainly ferrite, perlite and bainite.
3. the oil groove tank car production method of P440NL1 steel plate, it comprises heating, rolling and heat treatment step, it is characterized in that, described heating process adopts the steel billet of the chemical composition of following weight percent: C 0.14% ~ 0.24%, Si 0.15% ~ 0.50%, Mn 1.30% ~ 1.65%, P≤0.015%, S≤0.005%, Cu≤0.30%, V 0.020% ~ 0.10%, Nb 0.005% ~ 0.020%, Ni≤0.40%, Al 0.020% ~ 0.050%, Cev≤0.53%, surplus is Fe and inevitable impurity;
Described heat treatment step: Heating temperature 880 DEG C ± 10 DEG C, total heat-up time 30min ~ 50min; After normalizing, steel plate is through air-cooled process 10min ~ 20min.
4. the production method of oil groove tank car P440NL1 steel plate according to claim 3, it is characterized in that, described heating process: maximum heating temperature≤1240 DEG C, rate of heating >=1.2min/mm, soaking zone temperature 1220 DEG C ~ 1240 DEG C, soaking zone heat-up time >=90min.
5. the oil groove tank car production method of P440NL1 steel plate according to claim 3 or 4, is characterized in that, described rolling process: adopt II type controlled rolling process; First stage rolling, between 950 DEG C ~ 1100 DEG C, adds up draft >=70%; Start rolling temperature≤900 DEG C of subordinate phase, finishing temperature≤820 DEG C, accumulative draft >=30%; Roll rear steel plate to cool fast, red temperature 650 DEG C ~ 700 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257954.5A CN104878294A (en) | 2015-05-20 | 2015-05-20 | P440NL1 steel plate for oil groove tank car and production method of P440NL1 steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257954.5A CN104878294A (en) | 2015-05-20 | 2015-05-20 | P440NL1 steel plate for oil groove tank car and production method of P440NL1 steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104878294A true CN104878294A (en) | 2015-09-02 |
Family
ID=53945963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510257954.5A Pending CN104878294A (en) | 2015-05-20 | 2015-05-20 | P440NL1 steel plate for oil groove tank car and production method of P440NL1 steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104878294A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441793A (en) * | 2015-11-30 | 2016-03-30 | 舞阳钢铁有限责任公司 | High-strength carbon manganese steel plate for extra-wide tank car and production method of steel plate |
| CN109338215A (en) * | 2018-10-15 | 2019-02-15 | 江阴兴澄特种钢铁有限公司 | One kind 8~25mm thickness low yield strength ratio tank car high strength steel plate and its manufacturing method |
| CN114645209A (en) * | 2022-03-23 | 2022-06-21 | 新余钢铁股份有限公司 | Steel plate for medium-high temperature pressure vessel and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06158221A (en) * | 1992-11-17 | 1994-06-07 | Nippon Steel Corp | Multi-ply cold rolled steel sheet for automotive fuel tank excellent in weldability, deep drawability, fatigue property and corrosion resistance |
| CN103060685A (en) * | 2013-01-08 | 2013-04-24 | 舞阳钢铁有限责任公司 | 17MnNiVNbDR steel plate for tank car, and its production method |
| CN104480393A (en) * | 2014-11-26 | 2015-04-01 | 舞阳钢铁有限责任公司 | TC128GrB steel plate for oil bath tank truck and production method of TC128GrB steel plate |
-
2015
- 2015-05-20 CN CN201510257954.5A patent/CN104878294A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06158221A (en) * | 1992-11-17 | 1994-06-07 | Nippon Steel Corp | Multi-ply cold rolled steel sheet for automotive fuel tank excellent in weldability, deep drawability, fatigue property and corrosion resistance |
| CN103060685A (en) * | 2013-01-08 | 2013-04-24 | 舞阳钢铁有限责任公司 | 17MnNiVNbDR steel plate for tank car, and its production method |
| CN104480393A (en) * | 2014-11-26 | 2015-04-01 | 舞阳钢铁有限责任公司 | TC128GrB steel plate for oil bath tank truck and production method of TC128GrB steel plate |
Non-Patent Citations (2)
| Title |
|---|
| 孙刚: "《工程材料及热处理》", 31 August 2012 * |
| 朱黎江: "《金属材料与热处理》", 31 July 2011 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441793A (en) * | 2015-11-30 | 2016-03-30 | 舞阳钢铁有限责任公司 | High-strength carbon manganese steel plate for extra-wide tank car and production method of steel plate |
| CN109338215A (en) * | 2018-10-15 | 2019-02-15 | 江阴兴澄特种钢铁有限公司 | One kind 8~25mm thickness low yield strength ratio tank car high strength steel plate and its manufacturing method |
| CN109338215B (en) * | 2018-10-15 | 2020-10-30 | 江阴兴澄特种钢铁有限公司 | High-strength steel plate with thickness of 8-25 mm and low yield ratio for tank car and manufacturing method thereof |
| CN114645209A (en) * | 2022-03-23 | 2022-06-21 | 新余钢铁股份有限公司 | Steel plate for medium-high temperature pressure vessel and preparation method thereof |
| CN114645209B (en) * | 2022-03-23 | 2022-10-11 | 新余钢铁股份有限公司 | Steel plate for medium-high temperature pressure vessel and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110093552B (en) | High-strength-ductility Q & P steel plate with excellent welding performance and preparation method thereof | |
| CN104480393B (en) | Oil groove tank car TC128GrB steel plate and production method thereof | |
| CN103352167A (en) | Low-yield ratio and high-strength steel for bridges and manufacturing method thereof | |
| CN102851622A (en) | Superhigh-strength high-toughness steel plate for ocean engineering and production method thereof | |
| CN101935810B (en) | Method for manufacturing low-cost super-high intensity steel plate with yield strength of over 960 MPa for wide process operation window | |
| CN104513937A (en) | High-strength steel with yield strength of 800MPa and production method thereof | |
| CN109252107B (en) | Production method of high-flatness ultrahigh-strength steel | |
| CN107043895B (en) | Component design and production method of 1500 MPa-grade low-carbon medium-manganese copper-containing steel | |
| CN106906421A (en) | A kind of low temperature drop stamping auto parts and components, its drop stamping technique and its manufacture method | |
| CN105755369A (en) | Easy-to-weld and low-temperature steel plate with excellent lamellar tearing resistance and manufacturing method thereof | |
| CN106929755A (en) | A kind of steel plate and its manufacture method and purposes for producing low temperature drop stamping auto parts and components | |
| CN102691018A (en) | Low-compression ratio super-strength steel plate for ocean engineering and manufacturing method thereof | |
| CN118166286B (en) | 10.9-Grade non-adjustable cold heading steel hot rolled wire rod and manufacturing method thereof | |
| CN110358970B (en) | Welded structure bainite high-strength steel with yield strength of 1100MPa and preparation method thereof | |
| CN102839330A (en) | 800 Mpa high-strength thick plate for high heat input welding | |
| CN109402499A (en) | A kind of protection steel and its production method | |
| CN101497960B (en) | High strength anti-collision pipe for automobile and method of manufacturing the same | |
| CN105970097A (en) | Rare earth treated anti-explosion high-strength steel with yield strength of 700 MPa and production method | |
| CN104878294A (en) | P440NL1 steel plate for oil groove tank car and production method of P440NL1 steel plate | |
| CN102260824A (en) | Hot-rolled steel plate with yield strength of 550 MPa for hot forming and manufacturing method thereof | |
| CN114015934B (en) | 600 MPa-level hot continuous rolling dual-phase structure axle housing steel and production method thereof | |
| CN103614630A (en) | Steel for high-strength bridge and manufacturing method of steel | |
| JPH04285119A (en) | Production of thick-walled high tensile strength steel plate excellent in toughness at low temperature | |
| CN104264070B (en) | A kind of Thin Specs X80 pipe line steel and manufacture method thereof | |
| CN113897547A (en) | Cr-Mo-V type medium carbon hot work die steel and tissue spheroidizing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |
|
| WD01 | Invention patent application deemed withdrawn after publication |