CN104947005A - Large-thickness and high-performance hydroforming 14Cr1MoR steel plate and production method thereof - Google Patents
Large-thickness and high-performance hydroforming 14Cr1MoR steel plate and production method thereof Download PDFInfo
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Abstract
The invention discloses a large-thickness and high-performance hydroforming 14Cr1MoR steel plate and a production method thereof. The steel plate comprises the following components in percentage by weight: 0.05-0.15% of C, 0.50-0.70% of Si, 0.40-0.60% of Mn, no more than 0.009% of P, no more than 0.008% of S, 1.2-1.4% of Cr, 0.45-0.65% of Mo, no more than 0.15% of Cu, no more than 0.20% of Ni, no more than 0.003% of Sb, no more than 0.010% of Sn, no more than 0.012% of As, and the balance Fe and inevitable impurities. The steel plate forms the compound strengthening through Cr and Mo alloy elements to obtain excellent toughness matching; grains of the steel plate are uniform and fine; the normal-temperature stretching, high-temperature stretching and low-temperature impact performances in minimal mold welding and maximum mold welding states satisfy the technical requirements; the content of added noble metals is low, so that the cost is low, and the market competitiveness is gained; the demands of petrochemical and coal chemical industries at home and abroad on ultrathick steel plates for high-temperature pressure containers in the hydroforming environment are satisfied; and the large-thickness and high-performance hydroforming 14Cr1MoR steel plate can be widely applied to such core equipment as a coke drum, an ammonia converter, a hydrogenation reactor and a Fischer-tropsch reactor.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, especially a kind of heavy thickness high-performance faces hydrogen 14Cr1MoR steel plate and production method thereof.
Background technology
Due to the fast development of China's petrochemical industry and coalification industry in recent years, wall of a container is thick also to be increased considerably, and making sharply increases high-performance heavy thickness steel plate demand, has higher requirement to the security of equipment.The maximization of simultaneous equipment, the environment of equipment working condition is more and more harsher, main manifestations be high temperature, high pressure, resistant to hydrogen etc. complicated face hydrogen environment.14Cr1MoR is as the major equipment steel of petrochemical industry, Coal Chemical Industry, and technical requirements improves constantly by order party, and main manifestations is the rising of die welding temperature, the prolongation of die welding time, the reduction of impact temperature, the raising of impact value.Steel plate is heated to certain temperature of more than Ac3 by tradition 14Cr1MoR steel plate normalizing process, after insulation for some time in atmosphere cooling obtain close to balanced weave, this is organized as F+B.But require longer die welding system owing to facing in hydrogen Cr-Mo technical qualification, the low temperature impact properties at steel plate 1/2 place will be ensured simultaneously, the performance requriements after adopting traditional technique cannot ensure steel plate Simulated post-weld heat treatment.
Summary of the invention
The heavy thickness high-performance that the technical problem to be solved in the present invention is to provide a kind of low-temperature impact toughness of die welding when ensureing that steel plate is long faces hydrogen 14Cr1MoR steel plate; Present invention also offers the production method that a kind of heavy thickness high-performance faces hydrogen 14Cr1MoR steel plate.
For solving the problems of the technologies described above, the weight percentage of present component is: C 0.05% ~ 0.15%, Si 0.50% ~ 0.70%, Mn 0.40% ~ 0.60%, P≤0.009%, S≤0.008%, Cr 1.2% ~ 1.4%, Mo 0.45% ~ 0.65%, Cu≤0.15%, Ni≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.012%, surplus is Fe and inevitable impurity.
The thickness specification of steel plate of the present invention is 120 ~ 162mm.
Product of the present invention adopts selected steelmaking feed, at utmost reduces the harmful element content such as As, Sn, Sb.With the main strengthening element of C, Cr, Mo in the present invention, improve the intensity of steel plate with solid solution, gap augmented form, consider that C is as while strengthening element, affect low-temperature flexibility and the welding property of steel plate, C content need control in suitable scope.Chromium and molybdenum all improve the hardening capacity of steel, promote the structural transformation of bainite.The hot strength that the molybdenum of solid solution not only improves steel can also reduce the gathering of phosphorus at grain boundaries, improves the anti-temper embrittlement ability of steel, simultaneously because molybdenum is stronger carbide forming element, easily forms the Mo of molybdenum in Long-term Aging
2c or MoC type carbide, thus temper embrittlement process controlled by the diffusion process of molybdenum in carbide forming process.For ensureing that steel mould postwelding has good mechanical property, chromium content and molybdenum content should control the formation that just may promote rich chromium carbide in certain scope, thus stop the formation of molybdenum carbide, suppress the generation of temper embrittlement.
Mn content is selected mainly to play solution strengthening at 0.40 ~ 0.65%, Mn, reduce transformation temperature and improve armor plate strength, and Mn can significantly improve the hardening capacity of steel plate; Ni, as the element improving matrix toughness, adds the toughness that appropriate Ni improves steel plate during Composition Design; Pure in order to ensure steel plate steel, P, As, Sn etc. control in lower scope the constituent content that toughness is harmful to.
The inventive method comprises smelts cast, heating rolling and heat treatment step; The weight percentage of described smelting cast operation gained steel billet or ingot composition is described above; Described heat treatment step adopts the technique of double normalizing+double tempering.
Heat treatment step described in the inventive method: normalizing temperature is 910 ~ 950 DEG C for the first time, and soaking time is t ± 5 minute, accelerating cooling; First time, tempering temperature was 630 ~ 660 DEG C, and soaking time is 2t ± 5 minute; Second time normalizing temperature is 840 ~ 860 DEG C, and soaking time is t+ (10 ~ 20) minute, accelerating cooling; Second time tempering temperature is 700 ~ 730 DEG C, and soaking time is 2t+ (10 ~ 20) minute, and after insulation, air cooling obtains finished steel plate; Above-mentioned t is the mm of thickness of steel plate.
Heating rolling operation described in the inventive method: dry in the air before steel ingot or heating steel billet stove 30 minutes and more than, stewing steel 3 hours; At 700 DEG C of insulation 3h, heat-up rate≤50 DEG C subsequently/h, maximum heating temperature 1260 DEG C.
Heating rolling operation described in the inventive method: adopt two-stage controlled rolling process; In first stage, the first reduction in pass 8% and more than, back pass draught increases progressively step by step; In subordinate phase, ensure accumulative draft 60% and more than, last pass draught is greater than 10%.
The beneficial effect adopting technique scheme to produce is: the present invention forms complex intensifying by Cr, Mo alloying element, obtains good obdurability coupling; Steel plate uniform crystal particles is tiny, and the as-welded normal temperature of minimum die welding, maximum norm stretches, drawing by high temperature and low temperature impact properties meet technical requirements; The bullion content added is relatively less, and cost is lower, has the market competitiveness; Meet domestic and international petrochemical industry and coal chemical industry to the demand of facing high temperature pressure vessel ultra-thick steel plates in hydrogen environment, the nucleus equipments such as coke drum, ammonia synthesis converter, hydrogenator, fischer-tropsch reactor can be widely used in.
The inventive method adopts electric furnace (converter) smelting, the mode of die casting (continuous casting) produces steel ingot (steel billet), and by controlled rolling, heat treatment link adopts the explained hereafter of circulation normalizing+tempering; Decrease the segregation of crystal boundary harmful element after steel plate normalizing to greatest extent, and ensured the obdurability index of steel plate by structure refinement, thus the low-temperature impact toughness of die welding when ensureing that steel plate is long; The chrome molybdenum steel plate fine microstructures produced, be organized as tempering bainite+a small amount of ferrite, plasticity and toughness are good, and-20 DEG C of low-temperature impact toughness have larger surplus capacity, meet device fabrication requirement completely.
Heating link in the inventive method heat treatment step adopts the mode of Finite Dynamic Element to heat steel plate, by the technique of circulation normalizing+tempering; Normalizing+tempering process is first selected the technique of a short time high temperature and once low temperature in short-term, the technique of high temperature and secondary average tempering when the technique of secondary normalizing+tempering adopting two vice-minister, refinement steel plate 1/2 place crystal grain to greatest extent, reduce the segregation of crystal boundary harmful element after steel plate normalizing, thus the low-temperature impact toughness of die welding when ensureing that steel plate is long.
The inventive method adopts two-stage controlled rolling process and circulation normalizing+tempering, solves coarse grains inequality, problem that impelling strength is lower; Rolling technology, the thermal treatment process of the inventive method are simple, easy handling, are suitable for the ordinary steel ironworks production having quenching press, normalizing furnace, outer machine stove, car bottom furnace.The inventive method achieves lower carbon equivalent and the chemical composition design of alloy content, obtain the impact property after die welding when there is more tiny weave construction and Geng Jia long simultaneously, the every mechanical performance index of steel plate produced all meets technical qualification requirement, and production cost significantly reduces.After testing, the mechanical property of the inventive method gained steel plate after Simulated post-weld heat treatment reaches following requirements: Rp0.2 > 310MPa, Rm 520 ~ 680MPa, A >=22% ,-20 DEG C of AKV >=81J.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the macrograph of embodiment 1 steel plate maximum analog postwelding head thickness center;
Fig. 2 is the macrograph at embodiment 1 steel plate maximum analog postwelding afterbody mid-depth place;
Fig. 3 is the macrograph of embodiment 2 steel plate maximum analog postwelding head thickness center;
Fig. 4 is the macrograph at embodiment 2 steel plate maximum analog postwelding afterbody mid-depth place.
Embodiment
This heavy thickness high-performance is faced hydrogen 14Cr1MoR steel plate and is adopted following processing step to produce:
(1) smelt cast operation: molten steel is first smelted through electric furnace (converter), tap when P≤0.011%, strictly control tapping temperature, prevent back P, enter refining procedure subsequently, total refining time more than 45 minutes; The vacuum-treat of VD stove, vacuum tightness is not more than 66.6Pa, vacuum hold-time >=destroy vacuum after 20 minutes.
Employing die casting is produced, and adopt ingot mold to cast, steel ingot is with mould to enter to cheat slow cooling after raising one's hat, slow cooling after 24 hours temperature deliver to steel rolling and carry out Wen Qing, clear temperature >=150 DEG C of temperature; Or employing continuous casting process: strict control is opened and watered temperature, and superheating temperature, more than 20 DEG C, adopts suitable pulling rate, regulates 2 cool water quantities to guarantee slab quality.
The weight percentage of steel ingot (steel billet) composition that described die casting (continuous casting) pours into is: C 0.05% ~ 0.15%, Si 0.50% ~ 0.70%, Mn 0.40% ~ 0.60%, P≤0.009%, S≤0.008%, Cr 1.2% ~ 1.4%, Mo 0.45% ~ 0.65%, Cu≤0.15%, Ni≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.012%, surplus is Fe and inevitable impurity.
(2) heating rolling operation: during for ensureing Heating Steel Ingots, quality is good, steel ingot (steel billet) realizes that temperature is sent, temperature dress and Wen Qing, and dry in the air before dress steel stove more than 30 minutes, stewing steel 3 hours; For ensureing that alloying element abundant solid solution, crystal grain are tiny, adopt low speed to burn steel, and set up heating platform, at 700 DEG C of insulation 3h; Heat up subsequently, heat-up rate≤50 DEG C/h, maximum heating temperature 1260 DEG C, insulation homogenizing, ensures during heating that austenite homogenizing is abundant.Adopt two-stage controlled rolling process, the first stage is the austenite recrystallization stage, control reduction in pass according to the mode increased progressively step by step, guarantee every time deflection all 8% and more than, make austenite generation perfect recrystallization, be unlikely to grow up; Subordinate phase is the non-recrystallize stage rolling of austenite, and ensure that accumulative draft is more than 60%, the strict last pass deflection that controls is greater than 10%.
(3) heat treatment step: the positive tempering process of circulation adopting double normalizing+double tempering; First carry out first time normalizing, normalizing temperature is 910 ~ 950 DEG C, and adopt water-cooled accelerating cooling, red temperature≤300 DEG C, soaking time is t ± 5min, i.e. (t-5) ~ (t+5) minute; Carry out first time tempering again, tempering temperature is 630 ~ 660 DEG C, and soaking time is 2t ± 5min, i.e. (2*t-5) ~ (2*t+5) minute; Then carry out second time normalizing, normalizing temperature is 840 ~ 860 DEG C, and soaking time is t+ (10 ~ 20) min, i.e. (t+10) ~ (t+20) minute, adopts water-cooled accelerating cooling, red temperature≤200 DEG C; Finally carry out second time tempering, tempering temperature is 700 ~ 730 DEG C, and soaking time is 2t+ (10 ~ 20) min, i.e. (2*t+10) ~ (2*t+20) minute; After insulation, air cooling obtains the 14Cr1MoR steel plate that thickness is 120 ~ 162mm; In above-mentioned, t is steel plate thickness, and unit is mm.
Embodiment 1: the concrete production technique that this heavy thickness high-performance faces hydrogen 14Cr1MoR steel plate is as described below.
This 14Cr1MoR steel plate thickness is 162mm, and by percentage to the quality, steel plate chemical composition consists of: C 0.13%, Si 0.65%, Mn 0.53%, P 0.006%, S 0.004%, Cr 1.4%, Mo 0.55%, Cu 0.05%, Ni 0.20%, Sb 0.0025%, Sn 0.003%, As 0.007%, surplus is Fe and inevitable impurity.
Described heating rolling operation: dry in the air before the Heating Steel Ingots of die casting stove 30 minutes, stewing steel 3 hours; At 700 DEG C of insulation 3h, heat up subsequently, heat-up rate 40 DEG C/h, maximum heating temperature 1260 DEG C.Adopt two-stage controlled rolling process; In first stage, the first reduction in pass is the 8%, second reduction in pass is 8.2%, and back pass draught increases progressively step by step; In subordinate phase, ensure that accumulative draft is 75%, last pass draught is 12%.
Described heat treatment step: normalizing temperature is (945 ± 5) DEG C for the first time, water-cooled, red temperature 270 DEG C, and soaking time is 162min; First time, tempering process was (635 ± 5) DEG C, and soaking time is 324min; Second time normalizing temperature is (855 ± 5) DEG C, water-cooled, and soaking time is 182min, red temperature 150 DEG C; Second time temper, tempering temperature is (705 ± 5) DEG C, and soaking time is 344 min, air cooling after insulation; Described 14Cr1MoR steel plate can be obtained.
The physicochemical property assay of this 14Cr1MoR steel plate after simulation weldering, thermal treatment is in table 1, and maximum die welding tissue and inclusion analysis the results are shown in Table 2; The tissue (100 microns) of its maximum analog postwelding as depicted in figs. 1 and 2.
Table 1: the mechanical property (thickness of slab 1/2) of steel plate after simulation weldering, thermal treatment
Table 2: the maximum die welding tissue of steel plate and inclusion analysis result
Embodiment 2: the concrete production technique that this heavy thickness high-performance faces hydrogen 14Cr1MoR steel plate is as described below.
This 14Cr1MoR steel plate thickness is 120mm, and by percentage to the quality, steel plate chemical composition consists of: C 0.14%, Si 0.60%, Mn 0.50%, P 0.005%, S 0.003%, Cr 1.35%, Mo 0.5%, Cu 0.08%, Ni 0.15%, Sb 0.003%, Sn 0.003%, As 0.005%, surplus is Fe and inevitable impurity.
Described heating rolling operation: dry in the air before the heating steel billet of continuous casting stove 45 minutes, stewing steel 3 hours; At 700 DEG C of insulation 3h, heat up subsequently, heat-up rate 50 DEG C/h, maximum heating temperature 1260 DEG C.Adopt two-stage controlled rolling process; In first stage, the first reduction in pass is the 10%, second percentage pass reduction is 10.5%, and back pass draught increases progressively step by step; In subordinate phase, ensure that accumulative draft is 70%, last pass draught is 11%.
Described heat treatment step: normalizing temperature is (915 ± 5) DEG C for the first time, water-cooled, red temperature (250 ± 5) DEG C, and soaking time is 120min; First time, tempering process was (640 ± 5) DEG C, and soaking time is 240min; Second time normalizing temperature is (845 ± 5) DEG C, and soaking time is 130min, water-cooled, red temperature 150 DEG C; Second time temper, tempering temperature is (705 ± 5) DEG C, and soaking time is 260min, air cooling after insulation; Described 14Cr1MoR steel plate can be obtained.
The physicochemical property assay of this 14Cr1MoR steel plate after simulation weldering, thermal treatment is in table 3, and maximum die welding tissue and inclusion analysis the results are shown in Table 4; The tissue (100 microns) of its maximum analog postwelding as shown in Figure 3 and Figure 4.
Table 3: the mechanical property (thickness of slab 1/2) of steel plate after simulation weldering, thermal treatment
Table 4: the maximum die welding tissue of steel plate and inclusion analysis result
Embodiment 3: the concrete production technique that this heavy thickness high-performance faces hydrogen 14Cr1MoR steel plate is as described below.
This 14Cr1MoR steel plate thickness is 145mm, and by percentage to the quality, steel plate chemical composition consists of: C 0.05%, Si 0.70%, Mn 0.46%, P 0.009%, S 0.006%, Cr 1.3%, Mo 0.45%, Cu 0.12%, Ni 0.10%, Sb 0.0022%, Sn 0.010%, As 0.009%, surplus is Fe and inevitable impurity.
Described heating rolling operation: dry in the air before the heating steel billet of continuous casting stove 40 minutes, stewing steel 3 hours; At 700 DEG C of insulation 3h, heat up subsequently, heat-up rate 35 DEG C/h, maximum heating temperature 1260 DEG C.Adopt two-stage controlled rolling process; In first stage, the first reduction in pass is 8%, and back pass draught increases progressively step by step; In subordinate phase, ensure that accumulative draft is 60%, last pass draught is 15%.
Described heat treatment step: normalizing temperature is (935 ± 5) DEG C for the first time, water-cooled, and soaking time is 150min; First time, tempering process was (655 ± 5) DEG C, and soaking time is 290min; Second time normalizing temperature is (850 ± 5) DEG C, water-cooled, and soaking time is 165min; Second time temper, tempering temperature is (715 ± 5) DEG C, and soaking time is 300min, air cooling after insulation; Described 14Cr1MoR steel plate can be obtained.
The physicochemical property assay of this 14Cr1MoR steel plate after simulation weldering, thermal treatment is in table 5, and maximum die welding tissue and inclusion analysis the results are shown in Table 6.
Table 5: the mechanical property (thickness of slab 1/2) of steel plate after simulation weldering, thermal treatment
Table 6: the maximum die welding tissue of steel plate and inclusion analysis result
Embodiment 4: the concrete production technique that this heavy thickness high-performance faces hydrogen 14Cr1MoR steel plate is as described below.
This 14Cr1MoR steel plate thickness is 150mm, and by percentage to the quality, steel plate chemical composition consists of: C 0.09%, Si 0.50%, Mn 0.60%, P 0.007%, S 0.008%, Cr 1.26%, Mo 0.65%, Cu 0.10%, Ni 0.17%, Sb 0.0014%, Sn 0.005%, As 0.012%, surplus is Fe and inevitable impurity.
Described heating rolling operation: dry in the air before the Heating Steel Ingots of die casting stove 60 minutes, stewing steel 3 hours; At 700 DEG C of insulation 3h, heat up subsequently, heat-up rate 35 DEG C/h, maximum heating temperature 1260 DEG C.Adopt two-stage controlled rolling process; In first stage, the first reduction in pass is 12%, and back pass draught increases progressively step by step; In subordinate phase, ensure that accumulative draft is 65%, last pass draught is 12%.
Described heat treatment step: normalizing temperature is (925 ± 5) DEG C for the first time, water-cooled, and soaking time is 145min; First time, tempering process was (645 ± 5) DEG C, and soaking time is 305min; Second time normalizing temperature is (845 ± 5) DEG C, water-cooled, and soaking time is 165min; Second time temper, tempering temperature is (715 ± 5) DEG C, and soaking time is 320min, air cooling after insulation; Described 14Cr1MoR steel plate can be obtained.
The physicochemical property assay of this 14Cr1MoR steel plate after simulation weldering, thermal treatment is in table 7, and maximum die welding tissue and inclusion analysis the results are shown in Table 8.
Table 7: the mechanical property (thickness of slab 1/2) of steel plate after simulation weldering, thermal treatment
Table 8: the maximum die welding tissue of steel plate and inclusion analysis result
Embodiment 5: the concrete production technique that this heavy thickness high-performance faces hydrogen 14Cr1MoR steel plate is as described below.
This 14Cr1MoR steel plate thickness is 130mm, and by percentage to the quality, steel plate chemical composition consists of: C 0.15%, Si 0.57%, Mn 0.40%, P 0.008%, S 0.005%, Cr 1.20%, Mo 0.48%, Cu 0.15%, Ni 0.04%, Sb 0.0009%, Sn 0.001%, As 0.006%, surplus is Fe and inevitable impurity.
Described heating rolling operation: dry in the air before the Heating Steel Ingots of die casting stove 40 minutes, stewing steel 3 hours; At 700 DEG C of insulation 3h, heat up subsequently, heat-up rate 35 DEG C/h, maximum heating temperature 1260 DEG C.Adopt two-stage controlled rolling process; In first stage, the first reduction in pass is 9%, and back pass draught increases progressively step by step; In subordinate phase, ensure that accumulative draft is 68%, last pass draught is 13%.
Described heat treatment step: normalizing temperature is (930 ± 5) DEG C for the first time, water-cooled, and soaking time is 130min; First time, tempering process was (650 ± 5) DEG C, and soaking time is 255min; Second time normalizing temperature is (855 ± 5) DEG C, water-cooled, and soaking time is 150min; Second time temper, tempering temperature is (725 ± 5) DEG C, and soaking time is 275min, air cooling after insulation; Described 14Cr1MoR steel plate can be obtained.
The physicochemical property assay of this 14Cr1MoR steel plate after simulation weldering, thermal treatment is in table 9, and maximum die welding tissue and inclusion analysis the results are shown in Table 10.
Table 9: the mechanical property (thickness of slab 1/2) of steel plate after simulation weldering, thermal treatment
Table 10: the maximum die welding tissue of steel plate and inclusion analysis result
In above-described embodiment, physicochemical property inspection institute with sample through Simulated post-weld heat treatment, wherein minimum simulation weldering (Min. PWHT) heat-treat condition is 690 DEG C × 6h, maximum analog postwelding (Max. PWHT) heat-treat condition is: 690 DEG C × 24h, and specify that taking on furnace temperature is 300 DEG C, controlling warming and cooling rate is 55 DEG C/h.
As can be seen from the above-described embodiment, this heavy thickness high-performance faces the mechanical property of hydrogen 14Cr1MoR far away higher than standard-required value, and plasticity and toughness are good, and-20 DEG C of low-temperature impact toughness have larger surplus capacity, meet device fabrication requirement completely; The crystal grain of steel plate is superfine, is organized as tempering bainite+a small amount of ferrite.Present method adopts circulation normalizing (accelerating cooling)+tempering process to produce, and combines with controlled rolling process, and whole mechanical property of steel plate is even, steady quality, is applicable to producing in enormous quantities.
Claims (7)
1. heavy thickness high-performance faces a hydrogen 14Cr1MoR steel plate, it is characterized in that, the weight percentage of its composition is: C 0.05% ~ 0.15%, Si 0.50% ~ 0.70%, Mn 0.40% ~ 0.60%, P≤0.009%, S≤0.008%, Cr 1.2% ~ 1.4%, Mo 0.45% ~ 0.65%, Cu≤0.15%, Ni≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.012%, surplus is Fe and inevitable impurity.
2. heavy thickness high-performance according to claim 1 faces hydrogen 14Cr1MoR steel plate, it is characterized in that: the thickness specification of described steel plate is 120 ~ 162mm.
3. heavy thickness high-performance faces a production method for hydrogen 14Cr1MoR steel plate, it is characterized in that: it comprises smelts cast, heating rolling and heat treatment step; The described weight percentage smelting cast operation gained steel billet or ingot composition is: C 0.05% ~ 0.15%, Si 0.50% ~ 0.70%, Mn 0.40% ~ 0.60%, P≤0.009%, S≤0.008%, Cr 1.2% ~ 1.4%, Mo 0.45% ~ 0.65%, Cu≤0.15%, Ni≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.012%, surplus is Fe and inevitable impurity;
Described heat treatment step: the technique adopting double normalizing+double tempering.
4. heavy thickness high-performance according to claim 3 faces the production method of hydrogen 14Cr1MoR steel plate, it is characterized in that, described heat treatment step: normalizing temperature is 910 ~ 950 DEG C for the first time, and soaking time is t ± 5 minute, accelerating cooling; First time, tempering temperature was 630 ~ 660 DEG C, and soaking time is 2t ± 5 minute; Second time normalizing temperature is 840 ~ 860 DEG C, and soaking time is t+ (10 ~ 20) minute, accelerating cooling; Second time tempering temperature is 700 ~ 730 DEG C, and soaking time is 2t+ (10 ~ 20) minute, and after insulation, air cooling obtains finished steel plate; Above-mentioned t is the mm of thickness of steel plate.
5. the heavy thickness high-performance according to claim 3 or 4 faces the production method of hydrogen 14Cr1MoR steel plate, it is characterized in that, described heating rolling operation: dry in the air before steel ingot or heating steel billet stove 30 minutes and more than, stewing steel 3 hours; At 700 DEG C of insulation 3h, heat-up rate≤50 DEG C subsequently/h, maximum heating temperature 1260 DEG C.
6. the heavy thickness high-performance according to claim 3 or 4 faces the production method of hydrogen 14Cr1MoR steel plate, it is characterized in that, described heating rolling operation: adopt two-stage controlled rolling process; In first stage, the first reduction in pass 8% and more than, back pass draught increases progressively step by step; In subordinate phase, ensure accumulative draft 60% and more than, last pass draught is greater than 10%.
7. heavy thickness high-performance according to claim 5 faces the production method of hydrogen 14Cr1MoR steel plate, it is characterized in that, described heating rolling operation: adopt two-stage controlled rolling process; In first stage, the first reduction in pass 8% and more than, back pass draught increases progressively step by step; In subordinate phase, ensure accumulative draft 60% and more than, last pass draught is greater than 10%.
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