CN102080182A - High-strength steel plate Q460GJE-Z35 for extra-thick high-rise building structure and production method thereof - Google Patents
High-strength steel plate Q460GJE-Z35 for extra-thick high-rise building structure and production method thereof Download PDFInfo
- Publication number
- CN102080182A CN102080182A CN 201010606594 CN201010606594A CN102080182A CN 102080182 A CN102080182 A CN 102080182A CN 201010606594 CN201010606594 CN 201010606594 CN 201010606594 A CN201010606594 A CN 201010606594A CN 102080182 A CN102080182 A CN 102080182A
- Authority
- CN
- China
- Prior art keywords
- q460gje
- steel plate
- rolling
- building structure
- production method
- 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
Images
Abstract
The invention discloses a high-strength steel plate Q460GJE-Z35 for an extra-thick high-rise building structure and a production method thereof. The production method comprises the following steps of KR (Knotted Reactor) desulfurization, transferring to a converter, LF (Ladle Furnace) refining, VD (Vacuum Degassing) vacuum treatment, casting, mold cooling for 8 hours after reaching the steel ingot stripping time, cleaning (completion of cleaning within 8 hours), charging and rolling at the rolling temperature, heating, descaling, rolling through a 3,800mm rolling mill, straightening, cooling in heap, external examination, flaw detection, heat treatment, finishing and warehousing. With a rational component design, molded casting, heating and heat treatment, the yield strength of the obtained product is 440-480MPa; the tensile strength of the obtained product is 540-630MPa; the elongation rate of the obtained product is 24-27%; the impact energy of the obtained product at the temperature of -40 DEG C is 136-208J; the Z-direction properties are distributed between 36 and 57; and the mean value of three Z-direction properties of a single sample is more than 40%. The high-strength steel plate Q460GJE-Z35 for the extra-thick high-rise building structure can reach first-level flaw detection by the non-destructive flaw detection according to the JB/T 4730-2005 standard.
Description
Technical field
The present invention relates to super-thick steel plate and production method technical field, be specifically related to the thick high building structure of a kind of spy high tensile steel plate Q460GJE-Z35 and production method thereof.
Technical background
Along with developing rapidly of Chinese national economy, Highrise buildings is also thick towards the spy with the development of steel, extra wide, high-performance direction develop.Highrise buildings has proposed higher requirement with steel to steel plate obdurability, yield tensile ratio, anti-lamellar tearing ability etc., and the domestic fertile steel mill of steel plate for tall building more than the thickness 120mm is also few at present.The Q460GJE-Z35 Highrise buildings steel of thickness more than 100mm is because of reasons such as its production difficulty is big, the tooling requirement is special can't be produced.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of special thick high building structure high tensile steel plate Q460GJE-Z35 and production method thereof with good obdurability coupling.
The thick high building structure of a kind of spy high tensile steel plate Q460GJE-Z35, chemical ingredients and mass percent (unit, wt%) as follows, C:0.15～0.18, Si:0.30～0.45, Mn:1.45～1.55, P :≤0.015, S :≤0.003, micro alloying element (Nb+Ni+V): 0.165～0.205, Als:0.030～0.050, other is Fe and relict element.
Special thick high building structure not only has higher requirements to temperature and impelling strength with high tensile steel plate Q460GJE-Z35, and requires to have good anti-lamellar tearing.To achieve these goals, chemical composition design adopts low-carbon-equivalent, and Mn-Nb-V-Ni is ferrite+perlitic steel, and the strengthening mechanism of application is build up, refined crystalline strengthening, precipitation strength and solution strengthening.Main and other element formation carbide of C plays build up and precipitation strength effect, improves armor plate strength; Mn mainly plays solution strengthening and reduces transformation temperature, works to improve armor plate strength; Nb plays the refined crystalline strengthening effect, and during the steel ingot heating, the Nb of solid solution can stop austenite crystal to be grown up; Rolling through the two-stage, the C of V, Nization thing are separated out, and improve armor plate strength; The effect of Ni mainly is to increase austenitic condensate depression, plays the refined crystalline strengthening effect, can improve low-temperature impact toughness in addition.For guaranteeing flaw detection, take the Clean Steel smelting technology simultaneously, the main component design has been carried out in aspects such as the steel grade of keeping under strict control [P], [S], [N], [H], [O] five big harmful element content.1, low-carbon (LC), low-carbon-equivalent: according to the design concept of low-alloy high-strength steel plate, modern welded construction requires Hi-Stren steel that lower carbon equivalent is arranged, in order to have guaranteed good welding property, carbon content [Ceq=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15] is controlled at below 0.48%, and reduce carbon content significantly, can suppress pearlitic formation and eliminate carbon influences the bainite flexible.
2, reduce S, P content, improve the plasticity and toughness of steel: P content mainly influences the plasticity of steel, forms " cold short " easily, and S mainly influences the impelling strength and the tough-crisp transition temperature of steel, and in addition, sulfide inclusion influences the anisotropy of steel in the steel.Therefore, S content is controlled at below 0.003%, P content is controlled at below 0.015%.
3, adopting Nb, V, Ti, Ni combined microalloying: Nb, Ti is strong carboritride forming element, can play refined crystalline strengthening and precipitation strength effect, makes the carbon content that reduces steel significantly become possibility.Nb can improve the Tnr temperature, and the delayed deformation austenite recrystallization has enlarged austenite non-recrystallization district, has guaranteed the distortion accumulation of the operation of rolling, promotes the bainite forming core, crystal grain thinning, the over-all properties of raising steel plate.Because the avidity of Ti and N is extremely strong, form the TiN particle, and this particle is just beginning formation more than 1150 ℃.Therefore, in a series of processes such as steel ingot heating, steel plate rolling, the TiN particle can stop the generation of deformation austenite dynamic recrystallization and growing up of austenite recrystallization crystal grain, crystal grain thinning, play the refined crystalline strengthening effect, the Ti of trace is also very effective to the toughness of improving weld affected zone.
The thick high building structure of above-mentioned spy comprises with the production method of high tensile steel plate Q460GJE-Z35: molten iron (KR desulfurization) → converter (argon station) → LF refining → VD vacuum-treat → casting (33t, 40t ingot casting) → steel ingot demould time to after cold 8 hours → cleaning (cleaning out in 8 hours) of mould again → be with temperature to send roll-heat → de-scaling → 3800mm milling train → aligning → cooling in heap → outside inspection → flaw detection → thermal treatment → finishing → warehouse-in.
In the converter smelting, tapping carbon 〉=0.06%, tapping P≤0.012%, S≤0.012%; Point blows number of times and must not avoid slag under the tapping process greater than 2 times; Adopt LF, feed Si-Ca-Ba line and VD vacuum-treat, guarantee the cleanliness factor of steel, take the big 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 〉=20min; Heating guarantees the even austenitizing of steel ingot, and micro alloying element such as Nb is fully dissolved, heating process heat-up rate≤100 below 1000 ℃ ℃/hour, and heat-up rate is not limit more than 1000 ℃, top temperature≤1280 ℃; Rolling employing two-stage controlled rolling, 1020～1150 ℃ of roughing start rolling temperatures, rough rolling step temperature＞1000 ℃, adopt high temperature low speed to depress rolling greatly, steel thickness=the finished product that dries in the air is thick+(70-100) mm, and below roller-way is treated temperature or water-cooled to 860 ℃, beginning finish rolling stage rolling, draught is controlled at 8～15mm, 820 ± 20 ℃ of finishing temperatures.Roughing is rolling in the recrystallization zone, makes grain refining by deformation-recrystallize, thereby obtains less crystal grain after phase transformation.This in stage adopt high temperature, low speed, greatly depress rolling, the dendrite in the abundant broken steel ingot, deformation extent is big more, it is big more that forming core district density is closed the motivating force increase, crystal grain is just tiny more behind the recrystallize repeatedly.Finish rolling is rolling in the non-recrystallization district, adopts bigger accumulative total deflection, and austenite crystal fully is out of shape, at the more slip band of the inner formation of crystal grain, for ferritic transformation provides more nucleation site, crystal grain thinning.Banded structure and the crystal grain thinning of rolling back in order to control slab rolls the fast cold secondary of laggard ACC, and red temperature is returned in water outlet: 680 ℃; The back employing of rolling off the production line was carried out cooling in heap 48 hours more than 500 ℃, the cooling in heap back normalizing fast deepfreeze that finishes adopts 910 ± 10 ℃ of heating, 1.8min/mm+1.5h to be incubated, the fast cold 35-45 fast cold technology of normalizing of second of coming out of the stove, the band temperature and pressure are flat after the thermal treatment, and Performance Detection is done in the finishing sampling.
Steel plate chemical composition design of the present invention aspect adopts and does not add crystal grain thinning elements such as Nb, V, Ti, reduces metallurgical cost and molten steel inclusion content, and process aspect adopts normalizing+air-cooled crystal grain thinning, guarantees quality conformance with standard and service requirements.It is simple that it manufactures operation, can realize producing in batches.The strengthening mechanism of using is build up, refined crystalline strengthening, precipitation strength and solution strengthening.C content is controlled at 0.14～0.18%, and main and other elements formation carbide of C play build up and precipitation strength, and armor plate strength is increased; Mn content is controlled at 1.45～1.55%, and Mn mainly plays solution strengthening and reduces transformation temperature, the effect that improves armor plate strength; Because of the cast steel ingot is thicker, P, S content all need strict control, reduce inclusion and segregation.Condition of delivery of the present invention is normalizing, adopts normalizing+air-cooled technology, but crystal grain thinning improves the steel plate over-all properties.
By carrying out reasonable component design, die casting cast, heating and thermal treatment, successfully developed the special thick high building structure high tensile steel plate of 120mm-150mm at converter-die casting cast-heating rolling-normalizing heat-treatment production line, its yield strength in kind is at 440-480MPa, tensile strength is at 540-630MPa, elongation is at 24-27%,-40 ℃ of ballistic works are 136～208J, Z is distributed between the 36-57 to performance, 3 Z of individual sample to performance mean value all greater than 40%, through JB/T 4730-2005 standard non-destructive carrying out flaw detection, can reach the flaw detection one-level.The thick high building structure of this spy has satisfied engineering manufacturing high requirement with the exploitation of high tensile steel plate.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Metallographic structure figure (100X) after Fig. 1 TMCP of the present invention is rolling.
Fig. 2 is Q460GJE-Z35 steel plate thickness 1/4 place's metallograph (100X).
Embodiment
Embodiment 1
Operational path of the present invention: slow cooling → surface inspection → thermal treatment → finishing → flaw detection → detection → judgement → salable product warehouse-in is aligned → is rolled off the production line in the dark desulfurization → converter smelting of molten iron KR → LF refining → VD vacuum-treat → ingot casting cast → steel ingot heating → dephosphorization → controlled rolling → controlled chilling → control.
Concrete composition sees Table 1.
Chemical Composition/the % (1519 ℃ of liquidus temperatures) of table 1:Q460GJE-Z35 steel
Embodiment 2
Operational path of the present invention: slow cooling → surface inspection → thermal treatment → finishing → flaw detection → detection → judgement → salable product warehouse-in is aligned → is rolled off the production line in the dark desulfurization → converter smelting of molten iron KR → LF refining → VD vacuum-treat → ingot casting cast → steel ingot heating → dephosphorization → controlled rolling → controlled chilling → control.
Concrete composition sees Table 2.
Chemical Composition/the % (1519 ℃ of liquidus temperatures) of table 2:Q460GJE-Z35 steel
Embodiment 3
Operational path of the present invention: slow cooling → surface inspection → thermal treatment → finishing → flaw detection → detection → judgement → salable product warehouse-in is aligned → is rolled off the production line in the dark desulfurization → converter smelting of molten iron KR → LF refining → VD vacuum-treat → ingot casting cast → steel ingot heating → dephosphorization → controlled rolling → controlled chilling → control.
Concrete composition sees Table 3.
Chemical Composition/the % (1519 ℃ of liquidus temperatures) of table 3:Q460GJE-Z35 steel
Qualified for guaranteeing to detect a flaw, consider compression ratio at least 〉=5.Conventional ingot casting is selected 24T, 26T, 32T, 33T, and the water cooled mo(u)ld ingot is selected 36-40T, preferred 36T water cooled mo(u)ld, and this steel ingot thickness 780mm, ingot mould chassis and the cooling of water flowing all around, the insulation of cap mouth, compression ratio 6.5 can reach design requirements.
Smelting technology, tapping carbon 〉=0.06%, tapping P≤0.012%, S≤0.012%; Point blows number of times and must not avoid slag under the tapping process greater than 2 times.Take the big quantity of slag to carry out slag making, really how the white slag hold-time is controlled at more than the 15min; Stop the rare phenomenon of slag; Carry out the Argon operation in strict accordance with the Argon standard, forbid blowing cruelly.Dwell time under≤67Pa is controlled by 〉=20min; Carry out Ca behind the vacuum breaker immediately and handle, inclusion is carried out modification, soft blow is hung steel after greater than 5min.
Adhere to " high temperature is annotated slowly, and low temperature is annotated soon " principle.Concrete pouring technology requires to see Table 4.
Table 4: die casting casting process
Annotate: T11 represent liquidus temperature, and motor-car, raising one's hat and taking off the ingot time begins calculating from having annotated.
The heating process point: the steel ingot heating process carries out, and fully grills thoroughly, burns evenly to guarantee steel; The holding temperature of dead soaking pit is according to 1250 ℃～1280 ℃ execution.
Controlled rolling and controlled cooling: adopt two stage rolling, 1050 ℃～1150 ℃ of one stage start rolling temperatures, the rolling requirement of " high temperature, low speed, depress greatly " is adhered in strictness, for guaranteeing the distortion infiltration, when thickness of slab 〉=500mm, reduction in pass is by 60 ± 10mm control, and working roll rolling line speed is pressed≤1.5m/s control; Cool steel thickness is 160-200mm, and the two-stage start rolling temperature is at 820～860 ℃, and the two-stage takes to depress for a short time rolling, and reduction in pass is 15-20mm, finishing temperature 800-840 ℃.It is weak cold to enter twice of ACC after rolling, reduces the surface and the inner temperature difference as far as possible, guarantees to return red temperature at 620-660 ℃, is sent to powerful straightener after the cooling and carries out hot straightening.
Carry out slow cooling after steel plate rolls off the production line, go into burial pit temperature 〉=500 ℃; Cooling in heap time 〉=48 hour.
It is 910 ± 10 ℃ of holding temperatures that technology is carried out in thermal treatment, during insulation 1.8mim/mm+1.5 hour, and the steel plate back water-cooled 40-50S that comes out of the stove.By Nb, V, Ti combined microalloying, controlled rolling and controlled cooling, heat treatment phase combination, reach the purpose of refined crystalline strengthening, solution strengthening, precipitation strength, mechanical property and Z are all qualified to performance, and every index all has bigger affluence.See Table 5
Table 5:Q460GJE-Z35 steel plate mechanical mechanics property
The high power of steel plate the results are shown in Table 6
Table 6:Q460GJE-Z35 steel plate metallographic result
Produce 18 crowdes of thick Q460GJE-Z35 of 120mm altogether as a trial, wherein: yield strength is controlled at 440～480MPa, and tensile strength is controlled at 540～630MPa, and yield tensile ratio all≤0.82; Elongation is controlled at 24%-27%;-40 ℃ of V-type ballistic works are controlled at 136～208J; Z is distributed between the 36-57 to performance, 3 Z of individual sample to performance mean value all greater than 40%, flaw detection reaches 1 grade of flaw detection requirement, and performance index have satisfied the Q460GJE-Z35 development requires fully, have realized the combination of intensity and flexible matched well and higher internal soundness.
Claims (2)
1. the thick high building structure of spy high tensile steel plate Q460GJE-Z35, it is characterized in that: its chemical ingredients and mass percent (unit, wt%) as follows, C:0.15～0.18, Si:0.30～0.45, Mn:1.45～1.55, P :≤0.015, S :≤0.003, micro alloying element (Nb+Ni+V): 0.165～0.205, Als:0.030～0.050, other is Fe and relict element.
2. the thick high building structure of the spy as claimed in claim 1 production method of high tensile steel plate Q460GJE-Z35, it is characterized in that it comprises following flow process: molten iron (KR desulfurization) → converter (argon station) → LF refining → VD vacuum-treat → casting (33t, 40t ingot casting) → steel ingot demould time to after cold 8 hours of mould → cleaning (cleaning out in 8 hours) again → band temperature send roll-heat → de-scaling → 3800mm milling train → aligning → cooling in heap → outside inspection → flaw detection → thermal treatment → finishing → warehouse-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010606594 CN102080182A (en) | 2010-12-27 | 2010-12-27 | High-strength steel plate Q460GJE-Z35 for extra-thick high-rise building structure and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010606594 CN102080182A (en) | 2010-12-27 | 2010-12-27 | High-strength steel plate Q460GJE-Z35 for extra-thick high-rise building structure and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102080182A true CN102080182A (en) | 2011-06-01 |
Family
ID=44086370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010606594 Pending CN102080182A (en) | 2010-12-27 | 2010-12-27 | High-strength steel plate Q460GJE-Z35 for extra-thick high-rise building structure and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102080182A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345047A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | 150mm Q245R extra thick plate and production method thereof |
| CN102912221A (en) * | 2012-10-12 | 2013-02-06 | 舞阳钢铁有限责任公司 | Large-thickness structural steel plate for high-rise building and production method thereof |
| CN105081295A (en) * | 2014-05-21 | 2015-11-25 | 宝钢特钢有限公司 | Low-carbon structural steel smelting method for preventing pinhole defects appearing in steel ingot |
| CN105803174A (en) * | 2016-05-30 | 2016-07-27 | 舞阳钢铁有限责任公司 | Production method of low-yield-ratio Q460GJ steel plate |
| CN111974812A (en) * | 2020-07-09 | 2020-11-24 | 南京钢铁股份有限公司 | Production method of super-thick steel plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323929A (en) * | 2007-06-14 | 2008-12-17 | 舞阳钢铁有限责任公司 | High strength steel plate for big thickness tall building structure and production method thereof |
| CN101476081A (en) * | 2008-12-26 | 2009-07-08 | 首钢总公司 | 100mm and 400MPa grade high strength special heavy plate and manufacturing method thereof |
| CN101509097A (en) * | 2009-03-23 | 2009-08-19 | 唐山钢铁股份有限公司 | Q460 level low alloy high-strength corner iron and production process |
| CN101613828A (en) * | 2009-07-16 | 2009-12-30 | 首钢总公司 | Super-thick steel plate for low yield ratio buildings with 460 MPa grade yield strength and manufacture method |
| CN101871083A (en) * | 2010-06-14 | 2010-10-27 | 南阳汉冶特钢有限公司 | Ultra-thick low-alloy high-strength Q345-series steel plate and production method thereof |
| CN101880824A (en) * | 2010-06-14 | 2010-11-10 | 南阳汉冶特钢有限公司 | Q345q-series super-thick bridge steel plate and production method thereof |
-
2010
- 2010-12-27 CN CN 201010606594 patent/CN102080182A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323929A (en) * | 2007-06-14 | 2008-12-17 | 舞阳钢铁有限责任公司 | High strength steel plate for big thickness tall building structure and production method thereof |
| CN101476081A (en) * | 2008-12-26 | 2009-07-08 | 首钢总公司 | 100mm and 400MPa grade high strength special heavy plate and manufacturing method thereof |
| CN101509097A (en) * | 2009-03-23 | 2009-08-19 | 唐山钢铁股份有限公司 | Q460 level low alloy high-strength corner iron and production process |
| CN101613828A (en) * | 2009-07-16 | 2009-12-30 | 首钢总公司 | Super-thick steel plate for low yield ratio buildings with 460 MPa grade yield strength and manufacture method |
| CN101871083A (en) * | 2010-06-14 | 2010-10-27 | 南阳汉冶特钢有限公司 | Ultra-thick low-alloy high-strength Q345-series steel plate and production method thereof |
| CN101880824A (en) * | 2010-06-14 | 2010-11-10 | 南阳汉冶特钢有限公司 | Q345q-series super-thick bridge steel plate and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《宽厚板》 20050228 刘彦春等 新型低成本细晶强化Q460级中厚钢板－UP460的研制 1-4 1-2 第11卷, 第1期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345047A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | 150mm Q245R extra thick plate and production method thereof |
| CN102912221A (en) * | 2012-10-12 | 2013-02-06 | 舞阳钢铁有限责任公司 | Large-thickness structural steel plate for high-rise building and production method thereof |
| CN105081295A (en) * | 2014-05-21 | 2015-11-25 | 宝钢特钢有限公司 | Low-carbon structural steel smelting method for preventing pinhole defects appearing in steel ingot |
| CN105803174A (en) * | 2016-05-30 | 2016-07-27 | 舞阳钢铁有限责任公司 | Production method of low-yield-ratio Q460GJ steel plate |
| CN111974812A (en) * | 2020-07-09 | 2020-11-24 | 南京钢铁股份有限公司 | Production method of super-thick steel plate |
| CN111974812B (en) * | 2020-07-09 | 2022-08-19 | 南京钢铁股份有限公司 | Production method of super-thick steel plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102061424B (en) | Super-thick Q390GJC-Z35 steel plate for high-rise buildings and production method thereof | |
| CN102041437B (en) | 160mm-thick Q345E-Z35 steel plate for high-rise buildings and production method thereof | |
| CN101871083B (en) | Ultra-thick low-alloy high-strength Q345-series steel plate and production method thereof | |
| CN101880824B (en) | Q345q-series super-thick bridge steel plate and production method thereof | |
| CN102080185A (en) | High-tensile quenched and tempered steel plate for large-thickness structures and production method thereof | |
| CN102424934B (en) | Manufacturing method of steel forged component of 18CrNiMo7-6 large gear | |
| CN102080183A (en) | Q345GJ series structural steel plates for ultra-thick building and production method thereof | |
| CN102051522A (en) | Steel plate made of bainite structure high-strength toughness structural steel Q550D(E) and production method thereof | |
| CN110468349A (en) | A kind of antidetonation high-strength weather-proof bridge steel plate Q690qENH Z35 and its production method | |
| CN101096738A (en) | Steel plate with low welding crack sensitivity and production method thereof | |
| CN105908086B (en) | A kind of special thick low-alloy steel plate of low compression ratio and its manufacture method | |
| CN105861941A (en) | Ultra-thick steel plate for hydrogen-contacting equipment and preparation method of ultra-thick steel plate | |
| CN105925894A (en) | Super-thick high-strength lamellar-tearing-resistant Q500D-Z35 hydroelectric generating set steel plate and manufacturing method thereof | |
| CN102041435A (en) | Hot rolling steel plate made of weldable fine grain structural steel S355ML and production method thereof | |
| CN102312160B (en) | 12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and production method thereof | |
| CN102041432A (en) | Q420GJD-Z35 steel plate with thickness of less than or equal to 60 millimeters for high-rise building and production method thereof | |
| CN102345044A (en) | Q420GJE-Z35 steel plate used for high grade high-rise building and its production method | |
| CN101928885A (en) | Hydrothion corrosion resistant pipe steel and production method thereof | |
| CN104762545A (en) | Extra-thick high-strength steel plate production method | |
| CN103725967B (en) | 120mm specification following SCMV4-2 pressure vessel steel thick plate and production method | |
| CN103710620B (en) | A kind of heavy thickness steel plate for low temperature pressure container and production technique thereof | |
| CN113186455A (en) | Production method of high-strength steel plate for nuclear energy safety container | |
| CN102345042A (en) | Q420QE steel plate for high grade bridge and production method thereof | |
| CN104561837A (en) | Steel plate made of pressure vessel steel ASTMA387CL11Gr2 and production method thereof | |
| CN102080182A (en) | High-strength steel plate Q460GJE-Z35 for extra-thick high-rise building structure and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110601 |