CN102312160B - 12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and production method thereof - Google Patents
12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and production method thereof Download PDFInfo
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- CN102312160B CN102312160B CN 201110190491 CN201110190491A CN102312160B CN 102312160 B CN102312160 B CN 102312160B CN 201110190491 CN201110190491 CN 201110190491 CN 201110190491 A CN201110190491 A CN 201110190491A CN 102312160 B CN102312160 B CN 102312160B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000010583 slow cooling Methods 0.000 claims abstract description 11
- 238000007670 refining Methods 0.000 claims abstract description 9
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- 239000002893 slag Substances 0.000 claims description 12
- 229910052786 argon Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 9
- 238000007669 thermal treatment Methods 0.000 claims description 7
- 238000009933 burial Methods 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 3
- 235000011613 Pinus brutia Nutrition 0.000 claims description 3
- 241000018646 Pinus brutia Species 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Heat Treatment Of Steel (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a 12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and a production method thereof. The 12Cr2Mo1R steel plate comprises the following chemical components, by mass, 0.08-0.15% of C, 0.20-0.50% of Si, 0.30-0.60% of Mn, equal to or less than 0.018% of P, equal to or less than 0.005% of S, equal to or less than 0.020-0.050% of AlS, 2.0-2.5% of Cr, 0.90-1.10%of Mo, and the balance Fe and residual elements. The production method comprises steps of converter smelting, LF refining, vacuum refining, casting, heating, rolling, controlled cooling, slow cooling, and heat processing. A whole production process from molten iron pretreatment to steel plate heat treatment is executed in strict accordance with above technology, so the object quality performance margin of products is large, wherein the yield margin is 40-80MPa, the tensile margin is 55-70MPa, and the elongation margin is 6-9%, thereby the impact performance is uniform and the margin is large.
Description
Technical field
The present invention relates to steel, be specifically related to the thick hydrogen-contacting equipment of a kind of spy steel plate 12Cr2Mo1R steel and production method.
Technical background
During the Cr-Mo steel is produced, owing to its intensity, hardness height, tooling is required the reasons such as special, production difficulty is large, especially, produces thickness when 100mm is above for it, often adopts the cogging mode to become a useful person, and the production cycle is long, and the production cost waste seriously.
Summary of the invention
Once the rolling mode of becoming a useful person is produced guaranteed cost that thickness is 100mm～150m, the hydrogen-contacting equipment of protecting flaw detection is with steel plate 12Cr2Mo1R steel and production method thereof to the object of the present invention is to provide a kind of employing.
A kind of hydrogen steel plate 12Cr2Mo1R steel plate that faces, chemical ingredients and mass percent (unit, wt%) as follows: C:0.08～0.15, Si:0.20～0.50, Mn:0.30～0.60, P :≤0.018, S :≤0.005, Als :≤0.020～0.050, Cr:2.0～2.5, Mo:0.90～1.10, other is Fe and relict element.
The function analysis of above-mentioned chemical element is as follows: C: be most basic strengthening element in the steel, improve intensity, but C affects the welding property of steel and affects toughness.Consider, the content of carbon is hanging down of control as far as possible.Si: be the solution strengthening element, favourable to the intensity that improves steel plate.Mn: be the solution strengthening element, all favourable to intensity and the toughness that improves steel plate.P: unfavorable to welding, and have certain cold shortness, and in this steel grade, belong to harmful element, that should control is as far as possible low.S: easily form the MnS type impurity, have certain red brittleness, belong to harmful element in this steel grade, that should control is as far as possible low.The thickness that hydrogen steel plate 12Cr2Mo1R steel plate is faced in described guaranteed cost, guarantor's flaw detection is 100～150mm.
Above-mentioned production method of facing hydrogen steel plate 12Cr2Mo1R steel plate comprises the steps:
A. converter smelting: carbon 〉=0.05% of guaranteeing to tap, tapping P≤0.015%, tapping temperature 〉=1650 ℃; Point blows number of times and must not greater than 2 times, avoid slag under the tapping process;
B. LF refining: in described LF refining, take the large quantity of slag to carry out slag making, guarantee that the white slag hold-time is controlled at more than the 15min;
C. vacuum refinement: in described vacuum refinement, the dwell time under≤67Pa is controlled by 〉=25min;
D. casting: in described casting, adopting section is 29 tons of ingot casting casting of 780mm, and before the casting, the soft blow argon time must guarantee 〉=5min; After Argon to temperature meets teeming temperature and requires, close to open behind the calm 5min of argon gas and water, teeming temperature is controlled (T1 is liquidus temperature) by T1+ (35-45 ℃), enters the burial pit slow cooling after the steel ingot demoulding 32 hours;
E. heating: pine in described adding, the holding temperature of dead soaking pit is controlled at 1180 ℃～1260 ℃;
F. rolling: described rolling in, adopt the CR mode rolling, 1000 ℃～1150 ℃ of start rolling temperatures; The one-phase finishing temperature is at＞950 ℃, single pass draught 40mm～60mm, and the two-stage start rolling temperature is at＜900 ℃, the steel thickness that dries in the air is finished product thickness+(60～80) mm, two-stage take little depress rolling, finish rolling accumulative total draft＞45%, finishing temperature≤860 ℃;
G. control cold: in described control is cold, red temperature＜700 ℃, several times cooling, cooling rate is controlled at 1～8 ℃/s;
H. slow cooling: in described slow cooling, steel plate enters burial pit temperature 〉=450 ℃; Cooling in heap time 〉=36 hour;
I. thermal treatment: in described thermal treatment, adopt normalizing+air-cooled+tempering process, 900～960 ℃ of normalizing temperatures, soaking time 2～2.4min/cm, air-cooled to room temperature, 680 ± 20 ℃ of tempering temperatures, soaking time 4min/cm.
The present invention is by selecting large section ingot casting to guarantee compression ratio, select the low-cost chemical composition design of only adding Cr, Mo alloy on the composition, LF+VD technique guarantees the cleanliness factor of steel, reach each type impurity rank summation and be no more than 2.0, make the grain fineness number of steel reach 8.0～10.0 grades by controlled rolling and controlled cooling+normalizing+temper, by the above-mentioned effective enforcement that waits measure, successfully produced the special thick guarantor's flaw detection of 100mm～150mm, protected the 12Cr2Mo1R hydrogen-contacting equipment steel plate of mechanical property.Hot metal pretreatment is processed whole production process to steel plate hot, carry out in strict accordance with above-mentioned technique, the quality in kind performance surplus capacity of product is larger, wherein surrender surplus capacity at 40～80Mpa, the tension surplus capacity is at 55～70Mpa, and the elongation surplus capacity is 6～9%, and even, the rich amount of impact property is large.
Embodiment
The thick degree of spy of the present invention is 100mm～150mm guaranteed cost, protects to detect a flaw and face the chemical ingredients (unit that hydrogen steel 12Cr2Mo1R steel plate comprises following weight percent, wt%): C:0.08～0.15, Si:0.20～0.50, Mn:0.30～0.60, P :≤0.018, S :≤0.005, Als :≤0.020～0.050, Cr:2.0～2.5, Mo:0.90～1.10, other is Fe and relict element.
The production method that the present invention takes comprises: converter smelting, LF refining, vacuum refinement, cast, heating, rolling, control is cold, slow cooling, thermal treatment.In described converter smelting, carbon 〉=0.05% of guaranteeing to tap, tapping P≤0.015%, tapping temperature 〉=1650 ℃; Point blows number of times and must not greater than 2 times, avoid slag under the tapping process; In described LF refining, take the large quantity of slag to carry out slag making, guarantee that the white slag hold-time is controlled at more than the 15min; In described vacuum refinement, the dwell time under≤67Pa is controlled by 〉=25min; In described casting, adopting section is 29 tons of ingot casting casting of 780mm, and before the casting, the soft blow argon time must guarantee 〉=5min; After Argon to temperature meets teeming temperature and requires, close to open behind the calm 5min of argon gas and water, teeming temperature is controlled (T1 is liquidus temperature) by T1+ (35～45 ℃), enters the burial pit slow cooling after the steel ingot demoulding 32 hours; Pine in described adding, the holding temperature of dead soaking pit is controlled at 1180 ℃～1260 ℃; Described rolling in, adopt the CR mode rolling, 1000 ℃～1150 ℃ of start rolling temperatures; The one-phase finishing temperature is at＞950 ℃, single pass draught 40mm～60mm, and the two-stage start rolling temperature is at＜900 ℃, the steel thickness that dries in the air is finished product thickness+(60～80) mm, two-stage take little depress rolling, finish rolling accumulative total draft＞45%, finishing temperature≤860 ℃; In described control is cold, red temperature＜700 ℃, several times cooling, cooling rate is controlled at 1～8 ℃/s; In described slow cooling, steel plate enters burial pit temperature 〉=450 ℃; Cooling in heap time 〉=36 hour; In described thermal treatment, adopt normalizing+air-cooled+tempering process, 900～960 ℃ of normalizing temperatures, soaking time 2～2.4min/cm, air-cooled to room temperature, 680 ± 20 ℃ of tempering temperatures, soaking time 4-6min/cm.
By converter smelting, LF refining, vacuum refinement, cast, heating, rolling, control is cold, slow cooling, thermal treatment process, obtains to be described in table 1 below the 12Cr2Mo1R Finished Steel of chemical ingredients, mechanical property result is as shown in table 2.
Table 1 embodiment chemical ingredients
Table 2 embodiment results of property
The product that uses the method for the invention to produce amounts to 6, excellent surface quality, outer inspection qualification rate 100%, flaw detection unification level rate 100%, properties percent of pass 100% is wherein surrendered surplus capacity at 30～55Mpa, the tension surplus capacity is at 35～50Mpa, the elongation surplus capacity is that 7～9%, 20 ℃ of impact property mean values reach 151J, has satisfied the 12Cr2Mo1R development requires.
Claims (1)
1. the thick hydrogen-contacting equipment of a spy is with the production method of steel plate 12Cr2Mo1R steel, the thick hydrogen-contacting equipment of described spy is as follows with chemical ingredients and the mass percent of steel plate 12Cr2Mo1R steel: C:0.08～0.15, Si:0.20～0.50, Mn:0.30～0.60, P :≤0.018, S :≤0.005, Als :≤0.020～0.050, Cr:2.0～2.5, Mo:0.90～1.10, and other is Fe and relict element; Its production method comprises the steps: converter smelting; The LF refining; Vacuum refinement; Casting; Heating; Rolling; Control cold; Slow cooling; Thermal treatment; Wherein, described rolling in, adopt the CR mode rolling, 1000 ℃～1150 ℃ of start rolling temperatures; The one-phase finishing temperature is at＞950 ℃, single pass draught 40mm～60mm, and the two-stage start rolling temperature is at＜900 ℃, the steel thickness that dries in the air is finished product thickness+(60～80) mm, two-stage take little depress rolling, finish rolling accumulative total draft＞45%, finishing temperature≤860 ℃; Pine in described adding, the holding temperature of dead soaking pit is controlled at 1180 ℃～1260 ℃; It is characterized in that in the converter smelting step carbon 〉=0.05% of guaranteeing to tap, tapping P≤0.015%, tapping temperature 〉=1650 ℃; Point blows number of times and must not greater than 2 times, avoid slag under the tapping process; In described LF refining, take the large quantity of slag to carry out slag making, guarantee that the white slag hold-time is controlled at more than the 15min; In vacuum refinement: in described vacuum refinement, the dwell time under≤67Pa is controlled by 〉=25min; In described casting, adopting section is 29 tons of ingot casting casting of 780mm, and before the casting, the soft blow argon time must guarantee 〉=5min; After Argon to temperature meets teeming temperature and requires, close to open behind the calm 5min of argon gas and water, teeming temperature press T1+ (35-45 ℃) and is controlled, and T1 is liquidus temperature; Entered the burial pit slow cooling after the steel ingot demoulding 32 hours; In described control is cold, red temperature＜700 ℃, several times cooling, cooling rate is controlled at 1～8 ℃/s; In described slow cooling, steel plate enters burial pit temperature 〉=450 ℃; Cooling in heap time 〉=36 hour; In described thermal treatment, adopt normalizing+air-cooled+tempering process, 900～960 ℃ of normalizing temperatures, soaking time 2～2.4min/cm, air-cooled to room temperature, 680 ± 20 ℃ of tempering temperatures, soaking time 4min/cm.
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| CN 201110190491 CN102312160B (en) | 2011-07-08 | 2011-07-08 | 12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and production method thereof |
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| CN102732810B (en) * | 2012-06-05 | 2014-10-22 | 舞阳钢铁有限责任公司 | Heavy-gauge hydrogen steel plate and its production method |
| CN102732792B (en) * | 2012-07-02 | 2014-06-18 | 武汉钢铁(集团)公司 | Steel with thickness no lower than 100mm used in vessel in hydrogen environment, and production method thereof |
| CN103215512B (en) * | 2013-03-16 | 2016-01-27 | 南阳汉冶特钢有限公司 | The production technique of a kind of pressure vessel steel 12Cr2Mo1R and 150mm slab thereof |
| CN103725967B (en) * | 2013-12-26 | 2016-05-11 | 南阳汉冶特钢有限公司 | 120mm specification following SCMV4-2 pressure vessel steel thick plate and production method |
| CN103710628A (en) * | 2013-12-30 | 2014-04-09 | 南阳汉冶特钢有限公司 | Large-thickness hydrogenating 14Cr1MoR steel plate and production method thereof |
| CN108425002B (en) * | 2018-04-11 | 2019-10-01 | 东北大学 | A kind of preparation method of 12Cr2Mo1 hot rolling tank plate |
| CN109518079A (en) * | 2018-11-22 | 2019-03-26 | 湖南华菱湘潭钢铁有限公司 | A kind of production method of hydrogen-contacting equipment 15CrMoR steel plate |
| CN112481546B (en) * | 2020-11-26 | 2022-06-14 | 南阳汉冶特钢有限公司 | Production method of steel plate P20 for extra-thick plastic mold |
| CN114318110A (en) * | 2021-12-23 | 2022-04-12 | 舞阳钢铁有限责任公司 | Production method of hydrogen induced cracking resistant 12Cr2Mo1R steel plate |
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| CN102080187B (en) * | 2010-12-21 | 2013-02-13 | 南阳汉冶特钢有限公司 | Large-thickness Cr-Mo system 12Cr2Mo1R container steel and production method thereof |
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