CN103882344A - Vanadium, chromium and molybdenum added steel plate and production method thereof - Google Patents

Vanadium, chromium and molybdenum added steel plate and production method thereof Download PDF

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Publication number
CN103882344A
CN103882344A CN201410086967.6A CN201410086967A CN103882344A CN 103882344 A CN103882344 A CN 103882344A CN 201410086967 A CN201410086967 A CN 201410086967A CN 103882344 A CN103882344 A CN 103882344A
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steel plate
equal
less
chrome molybdenum
production method
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Inventor
谢良法
韦明
叶建军
袁锦程
刘生
吴艳阳
高雅
牛红星
张萌
尹为江
田苗
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Wuyang Iron and Steel Co Ltd
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Wuyang Iron and Steel Co Ltd
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Abstract

The invention discloses a vanadium, chromium and molybdenum added steel plate and a production method thereof. The steel plate consists of the following components in percentage by weight: more than or equal to 0.1% and less than or equal to 0.15% of C, less than or equal to 0.10% of Si, more than or equal to 0.40% and less than or equal to 0.60% of Mn, less than or equal to 0.008% of P, less than or equal to 0.005% of S, more than or equal to 2.00% and less than or equal to 2.50% of Cr, more than or equal to 1.00% and less than or equal to 1.10% of Mo, more than or equal to 0.25% and less than or equal to 0.35% of V, more than or equal to 0.10% and less than or equal to 0.20% of Ni, less than or equal to 0.05% of Nb, less than or equal to 0.20% of Cu, less than or equal to 0.003% of Sb, less than or equal to 0.010% of Sn, less than or equal to 0.010% of As, and the balance of Fe and inevitable impurities. The vanadium, chromium and molybdenum added steel plate disclosed by the invention meets a demand on relatively low hardness under a steel plate delivery state, and can reduce a risk of crack during welding and effectively reduce manufacturing difficulty of an equipment manufacturing plant; the steel plate is good in cold bending property, free from crack when being manufactured and good in shape, and the steel plate can be widely applied to such equipment as a hydrogenation reactor. Through a rational heat treatment process, the method disclosed by the invention can guarantee good strength and toughness matching, and simultaneously can meet a requirement on low hardness; an obtained mechanical property is much higher than a standard requirement value, a strength-yield ratio is moderate, hardness is relatively low, and plasticity and toughness are good.

Description

Add vanadium chrome molybdenum steel plate and production method thereof
Technical field
The invention belongs to technical field of ferrous metallurgy, especially one adds vanadium chrome molybdenum steel plate and production method thereof.
Background technology
In October, 2012,12Cr2Mo1VR trade mark steel is included into standard specifications in No. 1 amendment of GB713-2008 " Steel Plates For Boiler And Pressure Vessels ", illustrates in boiler and steels for pressure vessel use field, adds vanadium chrome molybdenum steel plate and has been subject to increasing attention.Add V chromemolybdenum steel owing to having higher intensity and better high temperature creep property than 12Cr2Mo1R steel plate (American Standard SA387Gr22, Europe superscript 13CrMo9-10), can meet the higher use temperature of pressurized vessel and light-weighted requirement, therefore application is more and more extensive.Although domestic equipment manufactory technology is increasingly mature, can control preferably welding quality, owing to adding, V chromemolybdenum steel alloy content is higher, easily produces during fabrication weld delayed crack and reheat crack(ing), has limited to a certain extent its application.The chrome molybdenum steel plate that domestic steel mill produces for a long time exists mother metal hardness higher always, and the problem of easily splitting when welding relies on import substantially when therefore domestic equipment manufactory order adds vanadium chrome molybdenum steel plate.
Summary of the invention
What when the technical problem to be solved in the present invention is to provide lower, the effective reduction welding of a kind of hardness, crackle produced adds vanadium chrome molybdenum steel plate; The present invention also provides a kind of production method that adds vanadium chrome molybdenum steel plate.
For solving the problems of the technologies described above, the present invention is made up of the component of following weight percentage: 0.11%≤C≤0.15%, Si≤0.10%, 0.40%≤Mn≤0.60%, P≤0.008%, S≤0.005%, 2.00%≤Cr≤2.50%, 1.00%≤Mo≤1.10%, 0.25%≤V≤0.35%, 0.10%≤Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.010%, surplus is Fe and inevitable impurity.
The thickness of steel plate of the present invention is 10~120mm.
The steel plate trade mark of the present invention is for facing hydrogen 2.25Cr1Mo0.25V, face hydrogen 2.25Cr1Mo0.3V or facing hydrogen 12Cr2Mo1VR.
In the present invention Mn content be chosen in 0.50~0.60%, Mn mainly play a part solution strengthening, reduce transformation temperature and improve armor plate strength; Mn can significantly improve the hardening capacity of steel plate, and with the increase of Mn content, plasticity and the low-temperature impact toughness of steel plate slightly decline, and intensity significantly improves.Cr content 2.30%~2.50%, Mo content 1.00%~1.10%, Cr, Mo all can increase austenite and cross cold energy power, improve the hardening capacity of steel plate, promote the formation of bainite.V content 0.25~0.35%, V mainly plays precipitation strength and anti-hydrogen-type corrosion agent effect in steel, and improves the high temperature creep property of steel; P≤0.008%, S≤0.005%, is pure in order to guarantee steel plate steel, higher impelling strength and the resistance to embrittlement energy that affects steel plate of P content.Appropriate Ni and Nb element are with further crystal grain thinning and improve intensity.
The inventive method comprises smelts continuous casting working procedure, heating rolling operation and heat treatment step, in described smelting continuous casting working procedure, adopts the smelting molten steel of above-mentioned weight percent component concentration to cast.
Described in the inventive method, each process is: (1) smelts casting operation: adopt electric arc furnace or converter mode to smelt, then send in LF refining furnace and carry out refining process vacuum-treat, cast out strand afterwards through continuous casting or die casting operation;
(2) heating rolling operation: described strand is put into continuous oven or soaking pit heating rolling, insulation homogenizing; Adopt two-stage controlled rolling process, the first stage is the austenite recrystallization stage, and subordinate phase is the non-recrystallize stage of austenite, rolls laggard windrow buttress and expands hydrogen;
(3) heat treatment step: the steel plate that rolling obtains is cooling through double normalizing and acceleration, and through temper, makes finished steel plate.
Described in the inventive method, in the two-stage controlled rolling process of heating rolling operation, the first stage is controlled reduction in pass more than 12%, and subordinate phase guarantees that accumulative total draft is more than 70%.
Described in the inventive method, in heating rolling operation, be heated to 1200~1250 ℃ and be incubated homogenizing.
Described in the inventive method, in heat treatment step, normalizing temperature is 930~950 ℃ for the first time, and normalizing temperature is 910~930 ℃ for the second time, all puts into acceleration heat-eliminating medium and accelerate cooling after normalizing; Described tempering temperature is 700~730 ℃, and soaking time is 4*t minute, the millimeter thickness that described t is steel plate, and after insulation, air cooling makes finished steel plate.
The inventive method adopts electrosmelting mode to smelt, and the impurity harmful element content such as P, S are low, and steel is pure; It is the controlled rolling of II type that the inventive method adopts two-stage controlled rolling process, has solved coarse grains inequality, problem that impelling strength is lower; The rolling technology of the inventive method is simple, and easy handling is suitable for there is quenching press, the ordinary steel ironworks of normalizing furnace, outer machine stove, car bottom furnace produces.The inventive method has realized the chemical composition design of suitable alloy content, obtained the steel plate of the resistance to embrittlement energy with more tiny weave construction and Geng Jia simultaneously, the every mechanical performance index of steel plate of producing all meets technical qualification requirement, and production cost significantly reduces.Hardness value under steel plate normalizing+tempering condition of delivery of producing after testing meets Brinell hardness not higher than 235HB; The mechanical property of steel plate after simulation postweld heat treatment reaches following requirement: Rp 0.2> 415MPa, Rm 585~760MPa, A>=19.0%, K at-10 ℃ v2>=54J, HB≤225.
Adopt the beneficial effect that produces of technique scheme to be: the present invention adds vanadium chrome molybdenum steel plate and met under steel plate condition of delivery compared with the demand of soft, and the risk cracking can reduce welding time, can effectively reduce the difficulty that equipment manufacturing is manufactured; The cold-bending property of steel plate of the present invention is good, and material does not ftracture while making, and steel plate template is good, can be widely used on the equipment such as hydrogenator.
The inventive method product adopt Cr, Mo, the strengthening of V alloy elements compounding, through rational thermal treatment process, have obtained good obdurability coupling, can meet again the requirement of soft simultaneously.The mechanical property of the chrome molybdenum steel plate that the inventive method obtains is far away higher than standard-required value, and intensity, yield tensile ratio are moderate, and hardness is lower, and plasticity and toughness are good; Effectively reduce the generation of weld delayed crack and reheat crack(ing), expanded its range of application.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is that schematic diagram is organized in the head thickness center of embodiment 1 steel plate maximum analog postwelding;
Fig. 2 is that schematic diagram is organized in the head thickness center of embodiment 2 steel plate maximum analog postweldings.
Embodiment
The chemical composition that adds vanadium chrome molybdenum steel plate of this low yield strength ratio is made up of the component of following weight percentage: 0.11%≤C≤0.15%, Si≤0.10%, 0.40%≤Mn≤0.60%, P≤0.008%, S≤0.005%, 2.00%≤Cr≤2.50%, 1.00%≤Mo≤1.10%, 0.25%≤V≤0.35%, 0.10%≤Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.010%, surplus is Fe and inevitable impurity.
The production method that adds vanadium chrome molybdenum steel plate of this low yield strength ratio adopts following concrete implementation step:
(1) smelt casting step: first smelt with electric arc furnace or oxygen converter, in the time that molten steel temperature reaches 1600 ℃, tapping; Then send in LF refining furnace and carry out refining 1 hour, deoxidation fast, according to de-S situation, fine setting Mn, Mo, Ni, Cr, V content, make it to reach the composition requirement that originally adds vanadium chrome molybdenum steel plate, after refining, enter evacuation, after 30 minutes vacuumize, carry out continuous casting or strand is produced in die casting.
(2) heating rolling step: described strand is put into continuous oven or soaking pit heating rolling; Be heated to 1200~1250 ℃, insulation homogenizing, guarantees when heating that austenite homogenizing is abundant; Adopt two-stage controlled rolling process, the first stage is the austenite recrystallization stage, controls reduction in pass more than 12%, and subordinate phase is the non-recrystallize stage rolling of austenite, guarantees that accumulative total draft is more than 70%, rolls laggard windrow buttress and expands hydrogen.
(3) heat treatment step: adopt double normalizing+accelerate cooling and through the thermal treatment process of tempering, normalizing temperature is 930~950 ℃ for the first time, normalizing temperature is 910~930 ℃ for the second time, all put into after normalizing and accelerate heat-eliminating medium and accelerate coolingly, adopt different cooling water inflows according to different thickness specifications; Pass through afterwards temper, tempering temperature is 700~730 ℃ again, and soaking time is that 4*t min(t is steel plate thickness, unit: mm), after insulation, air cooling makes and originally adds vanadium chrome molybdenum steel plate.
Embodiment 1: the present embodiment adds vanadium chrome molybdenum steel plate and adopts following concrete technology step to produce.
(1) smelt casting operation: the chemical composition of strand is made up of the component of following weight percentage: C 0.14%, Si 0.08%, Mn 0.56%, P 0.005%, S 0.002%, Cr 2.50%, Mo 1.02%, V 0.35%, Ni 0.16%, Nb 0.030%, Cu 0.08%, Sb 0.002%, Sn 0.004%, As 0.005%, surplus is Fe and inevitable impurity.
(2) heating rolling operation: described strand is put into continuous oven heating rolling; Be heated to 1230 ℃ and be incubated homogenizing; The reduction in pass of rolling first stage is 12%~15%, and subordinate phase accumulative total draft is 78%.
(3) heat treatment step: normalizing temperature is 940 ℃ for the first time, normalizing temperature is 920 ℃ for the second time; Tempering temperature is 710 ℃, and soaking time is 448min.
The thickness that the present embodiment gained adds vanadium chrome molybdenum steel plate is 112mm, the simulation postweld heat treatment technique of sample for physicochemical property inspection institute: minimum simulation weldering (Min.PWHT) heat-treat condition is 705 ℃ × 8h, and maximum analog postwelding (Max.PWHT) heat-treat condition is 705 ℃ × 32h.The assay of the present embodiment gained steel plate physicochemical property is in table 1 and table 2, and the tissue of its maximum analog postwelding is shown in Fig. 1.
The mechanical property (thickness of slab 1/2) of table 1: embodiment 1 steel plate after simulation postweld heat treatment
The maximum die welding tissue of table 2: embodiment 1 steel plate and inclusion analysis result
Can be found out by table 1, table 2 and Fig. 1, the mechanical property of this steel plate is far away higher than standard-required value, and yield tensile ratio is moderate, and plasticity and toughness are good.Crystal grain is superfine, is organized as ferrite+tempering bainite.
Embodiment 2: the present embodiment adds vanadium chrome molybdenum steel plate and adopts following concrete technology step to produce.
(1) smelt casting operation: the chemical composition of strand is made up of the component of following weight percentage: C 0.14%, Si 0.03%, Mn 0.49%, P 0.005%, S 0.003%, Cr 2.35%, Mo 1.06%, V 0.28%, Ni 0.13%, Nb 0.033%, Cu 0.08%, Sb 0.002%, Sn 0.003%, As 0.005%, surplus is Fe and inevitable impurity.
(2) heating rolling operation: described strand is put into continuous oven heating rolling; Be heated to 1230 ℃ and be incubated homogenizing; The reduction in pass of rolling first stage is 12%~15%, and subordinate phase accumulative total draft is 82%.
(3) heat treatment step: normalizing temperature is 940 ℃ for the first time, normalizing temperature is 910 ℃ for the second time; Tempering temperature is 710 ℃, and soaking time is 368min.
The thickness that the present embodiment gained adds vanadium chrome molybdenum steel plate is 92mm, the simulation postweld heat treatment technique of sample for 0 physicochemical property inspection institute: minimum simulation weldering (Min.PWHT) heat-treat condition is 705 ℃ × 8h, maximum analog postwelding (Max.PWHT) heat-treat condition is 705 ℃ × 32h, the assay of the present embodiment gained steel plate physicochemical property is in table 3 and table 4, and the tissue of its maximum analog postwelding is shown in Fig. 2.
The mechanical property (thickness of slab 1/2) of table 3: embodiment 2 steel plates after simulation postweld heat treatment
The maximum die welding tissue of table 4: embodiment 2 steel plates and inclusion analysis result
Can be found out by table 3, table 4 and Fig. 2, the mechanical property conformance with standard required value of this steel plate, moderate strength, hardness is lower, is organized as the tempered structure of bainite.
Embodiment 3: originally add vanadium chrome molybdenum steel plate and adopt following concrete technology step to produce.
(1) smelt casting operation: the chemical composition of strand is made up of the component of following weight percentage: C 0.13%, Si 0.04%, Mn 0.60%, P 0.008%, S 0.003%, Cr 2.20%, Mo 1.00%, V 0.32%, Ni 0.15%, Nb 0.05%, Cu 0.06%, Sb 0.002%, Sn 0.005%, As 0.007%, surplus is Fe and inevitable impurity.
(2) heating rolling operation: described strand is put into continuous oven heating rolling; Be heated to 1240 ℃ and be incubated homogenizing; The reduction in pass of rolling first stage is 14%~17%, and subordinate phase accumulative total draft is 80%.
(3) heat treatment step: normalizing temperature is 930 ℃ for the first time, normalizing temperature is 910 ℃ for the second time; Tempering temperature is 700 ℃, and soaking time is 304min.
The thickness that the present embodiment gained adds vanadium chrome molybdenum steel plate is 76mm, and Brinell hardness is not higher than 230HB; The mechanical property of steel plate after simulation postweld heat treatment is: Rp 0.2550MPa, Rm 655MPa, K at 26.0% ,-10 ℃ of A v2273J.
Embodiment 4: originally add vanadium chrome molybdenum steel plate and adopt following concrete technology step to produce.
(1) smelt casting operation: the chemical composition of strand is made up of the component of following weight percentage: C 0.15%, Si 0.03%, Mn 0.40%, P 0.003%, S 0.005%, Cr 2.00%, Mo 1.10%, V 0.32%, Ni 0.20%, Nb 0.033%, Cu 0.09%, Sb 0.003%, Sn 0.002%, As 0.010%, surplus is Fe and inevitable impurity.
(2) heating rolling operation: described strand is put into continuous oven heating rolling; Be heated to 1200 ℃ and be incubated homogenizing; The reduction in pass of rolling first stage is 12%~16%, and subordinate phase accumulative total draft is 83%.
(3) heat treatment step: normalizing temperature is 950 ℃ for the first time, normalizing temperature is 930 ℃ for the second time; Tempering temperature is 730 ℃, and soaking time is 136min.
The thickness that the present embodiment gained adds vanadium chrome molybdenum steel plate is 34mm, and Brinell hardness is not higher than 228HB; The mechanical property of steel plate after simulation postweld heat treatment is: Rp 0.2577MPa, Rm 686MPa, K at 23.0% ,-10 ℃ of A v2243J.
Embodiment 5: originally add vanadium chrome molybdenum steel plate and adopt following concrete technology step to produce.
(1) smelt casting operation: the chemical composition of strand is made up of the component of following weight percentage: C 0.11%, Si 0.10%, Mn 0.47%, P 0.006%, S 0.003%, Cr 2.07%, Mo 1.05%, V 0.25%, Ni 0.10%, Nb 0.01%, Cu 0.2%, Sb 0.002%, Sn 0.010%, As 0.006%, surplus is Fe and inevitable impurity.
(2) heating rolling operation: described strand is put into continuous oven heating rolling; Be heated to 1250 ℃ and be incubated homogenizing; The reduction in pass of rolling first stage is 12%~16%, and subordinate phase accumulative total draft is 70%.
(3) heat treatment step: normalizing temperature is 950 ℃ for the first time, normalizing temperature is 930 ℃ for the second time; Tempering temperature is 720 ℃, and soaking time is 104min.
The thickness that the present embodiment gained adds vanadium chrome molybdenum steel plate is 26mm, and Brinell hardness is not higher than 230HB; The mechanical property of steel plate after simulation postweld heat treatment is: Rp 0.2595MPa, Rm 700MPa, K at 25.0% ,-10 ℃ of A v2282J.

Claims (8)

1. add a vanadium chrome molybdenum steel plate, it is characterized in that, its component by following weight percentage forms: 0.11%≤C≤0.15%, Si≤0.10%, 0.40%≤Mn≤0.60%, P≤0.008%, S≤0.005%, 2.00%≤Cr≤2.50%, 1.00%≤Mo≤1.10%, 0.25%≤V≤0.35%, 0.10%≤Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.010%, surplus is Fe and inevitable impurity.
2. the vanadium chrome molybdenum steel plate that adds according to claim 1, is characterized in that: the thickness of described steel plate is 10~120mm.
3. the vanadium chrome molybdenum steel plate that adds according to claim 1 and 2, is characterized in that: the described steel plate trade mark is for facing hydrogen 2.25Cr1Mo0.25V, face hydrogen 2.25Cr1Mo0.3V or facing hydrogen 12Cr2Mo1VR.
4. one kind adds the production method of vanadium chrome molybdenum steel plate, it comprises smelting continuous casting working procedure, heating rolling operation and heat treatment step, it is characterized in that: in described smelting continuous casting working procedure, the molten steel of smelting is to cast after following weight percentage component concentration: 0.11%≤C≤0.15%, Si≤0.10%, 0.40%≤Mn≤0.60%, P≤0.008%, S≤0.005%, 2.00%≤Cr≤2.50%, 1.00%≤Mo≤1.10%, 0.25%≤V≤0.35%, 0.10%≤Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.010%, surplus is Fe and inevitable impurity.
5. the production method that adds vanadium chrome molybdenum steel plate according to claim 4, it is characterized in that, described each process is: (1) smelts casting operation: adopt electric arc furnace or converter mode to smelt, then send in LF refining furnace and carry out refining process vacuum-treat, cast out strand through continuous casting or die casting operation afterwards;
(2) heating rolling operation: described strand is put into continuous oven or soaking pit heating rolling, insulation homogenizing; Adopt two-stage controlled rolling process, the first stage is the austenite recrystallization stage, and subordinate phase is the non-recrystallize stage of austenite, rolls laggard windrow buttress and expands hydrogen;
(3) heat treatment step: the steel plate that rolling obtains is cooling through double normalizing and acceleration, and through temper, makes finished steel plate.
6. the production method that adds vanadium chrome molybdenum steel plate according to claim 5, it is characterized in that: in the two-stage controlled rolling process of described heating rolling operation, first stage control reduction in pass 12% and more than, subordinate phase guarantee accumulative total draft 70% and more than.
7. the production method that adds vanadium chrome molybdenum steel plate according to claim 5, is characterized in that: in described heating rolling operation, be heated to 1200~1250 ℃ and be incubated homogenizing.
8. according to the production method that adds vanadium chrome molybdenum steel plate described in claim 5,6 or 7, it is characterized in that: in described heat treatment step, normalizing temperature is 930~950 ℃ for the first time, and normalizing temperature is 910~930 ℃ for the second time, all puts into acceleration heat-eliminating medium and accelerate cooling after normalizing; Described tempering temperature is 700~730 ℃, and soaking time is 4*t minute, the millimeter thickness that described t is steel plate, and after insulation, air cooling makes finished steel plate.
CN201410086967.6A 2014-03-11 2014-03-11 Vanadium, chromium and molybdenum added steel plate and production method thereof Pending CN103882344A (en)

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CN107022723A (en) * 2017-03-21 2017-08-08 舞阳钢铁有限责任公司 The big big substance 12Cr2Mo1VR steel plates of specification and its production method
CN108149134A (en) * 2017-12-08 2018-06-12 南阳汉冶特钢有限公司 A kind of high temperature pressure vessel 12Cr2Mo1VR steel plates and its production method
CN108456827A (en) * 2018-01-30 2018-08-28 舞阳钢铁有限责任公司 A kind of modified adds vanadium chrome molybdenum steel plate and its production method
CN108728748A (en) * 2018-06-08 2018-11-02 舞阳钢铁有限责任公司 A kind of low-phosphorous SA542TypeDCL4a steel plates and production method
CN109877157A (en) * 2019-02-21 2019-06-14 舞阳钢铁有限责任公司 Slab is improved to become a useful person 2.25Cr-1Mo steel plate inspection qualification rate method
CN109971936A (en) * 2019-04-09 2019-07-05 舞阳钢铁有限责任公司 Reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness method
CN110499458A (en) * 2019-08-19 2019-11-26 舞阳钢铁有限责任公司 The production method of big thickness ultra-wide DIWA353 steel plate
CN111394551A (en) * 2020-03-30 2020-07-10 舞阳钢铁有限责任公司 Production method of low-surface-hardness SA542TypeDCl4a steel
CN112176156A (en) * 2020-08-26 2021-01-05 江阴兴澄特种钢铁有限公司 Production method of SA387Gr22CL2 steel plate for head of pressure-bearing equipment and simulated hot forming method
CN112620916A (en) * 2020-12-18 2021-04-09 舞钢神州重工金属复合材料有限公司 Composite steel plate and explosive welding production method thereof
WO2022179560A1 (en) * 2021-02-25 2022-09-01 宝山钢铁股份有限公司 Steel plate for high-temperature equipment and manufacturing method therefor

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
CN105861941A (en) * 2016-04-19 2016-08-17 江阴兴澄特种钢铁有限公司 Ultra-thick steel plate for hydrogen-contacting equipment and preparation method of ultra-thick steel plate
CN107022723A (en) * 2017-03-21 2017-08-08 舞阳钢铁有限责任公司 The big big substance 12Cr2Mo1VR steel plates of specification and its production method
CN108149134A (en) * 2017-12-08 2018-06-12 南阳汉冶特钢有限公司 A kind of high temperature pressure vessel 12Cr2Mo1VR steel plates and its production method
CN108456827A (en) * 2018-01-30 2018-08-28 舞阳钢铁有限责任公司 A kind of modified adds vanadium chrome molybdenum steel plate and its production method
CN108728748A (en) * 2018-06-08 2018-11-02 舞阳钢铁有限责任公司 A kind of low-phosphorous SA542TypeDCL4a steel plates and production method
CN109877157A (en) * 2019-02-21 2019-06-14 舞阳钢铁有限责任公司 Slab is improved to become a useful person 2.25Cr-1Mo steel plate inspection qualification rate method
CN109971936A (en) * 2019-04-09 2019-07-05 舞阳钢铁有限责任公司 Reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness method
CN110499458A (en) * 2019-08-19 2019-11-26 舞阳钢铁有限责任公司 The production method of big thickness ultra-wide DIWA353 steel plate
CN111394551A (en) * 2020-03-30 2020-07-10 舞阳钢铁有限责任公司 Production method of low-surface-hardness SA542TypeDCl4a steel
CN111394551B (en) * 2020-03-30 2022-04-05 舞阳钢铁有限责任公司 Production method of low-surface-hardness SA542TypeDCl4a steel
CN112176156A (en) * 2020-08-26 2021-01-05 江阴兴澄特种钢铁有限公司 Production method of SA387Gr22CL2 steel plate for head of pressure-bearing equipment and simulated hot forming method
CN112620916A (en) * 2020-12-18 2021-04-09 舞钢神州重工金属复合材料有限公司 Composite steel plate and explosive welding production method thereof
WO2022179560A1 (en) * 2021-02-25 2022-09-01 宝山钢铁股份有限公司 Steel plate for high-temperature equipment and manufacturing method therefor

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Application publication date: 20140625