CN103131956B - High-strength steel plate with tensile strength of 800 MPa above and manufacturing method thereof - Google Patents
High-strength steel plate with tensile strength of 800 MPa above and manufacturing method thereof Download PDFInfo
- Publication number
- CN103131956B CN103131956B CN201310083287.4A CN201310083287A CN103131956B CN 103131956 B CN103131956 B CN 103131956B CN 201310083287 A CN201310083287 A CN 201310083287A CN 103131956 B CN103131956 B CN 103131956B
- Authority
- CN
- China
- Prior art keywords
- steel plate
- time
- temperature
- tensile strength
- tempering
- 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.)
- Expired - Fee Related
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention provides a high-strength steel plate with tensile strength of 800 MPa above and a manufacturing method thereof. The steel plate produced by the manufacturing method comprises the following components in percentage by weight: 0.08-0.21% of carbon, 0.15-0.45% of silicon, 0.70-1.10% of manganese, at most 0.015% of phosphorus, at most 0.010% of sulfur, 0.40-0.65% of chromium, 0.10-0.25% of molybdenum, 0.030-0.080% of vanadium, 0.010-0.030% of titanium, 0.020-0.050% of aluminum, 0.0005-0.005% of boron, and the balance of iron and inevitable impurities. The tensile strength of the steel plate reaches higher than 800 MPa, the -20 DEG C transverse impact work is not less than 34J, the percentage reduction in area is not less than 45%, and the lateral swelling amount is not less than 0.38 mm; and the invention has the advantages of low cost and favorable welding performance.
Description
Technical field
The invention belongs to metallic substance and manufacture field, what be specifically related to is high strength steel plate and the manufacture method thereof that a kind of tensile strength reaches more than 800MPa.
Background technology
Nuclear power is the first-selection of reply climate change.Nuclear power there is no carbon emission, safety, stable, reliable large power supply, it is the irreplaceable strategic choice realizing electric power sustainable supply, accelerate the state basic policy that scale development nuclear power has become our country, Construction of Nuclear Electricity will become an important component part of national critical infrastructures construction.Country is by safe and efficient Nuclear Power Development, and by 2015, total installation of generating capacity will more than 1,600 ten thousand kilowatts; Comprehensive participation generation Ⅲ nuclear power introduction, digestion, absorption, again innovation work.
Nuclear power plants mechanical module strut member is harsh complicated with steel service condition, must have excellent over-all properties.To the index such as high-strong toughness energy, non-deformability under purity of steel, internal soundness, low temperature, there is strict requirement.Steel plate needs to carry out different thermal treatment process experiments to seek optimum treatment process parameter after rolling, and therefore production process has higher difficulty.
What the present invention adopted rational chemical composition design and the thermal treatment process of quenching+tempering that matches is ensures that steel plate has the prerequisite that rational microtexture and every mechanical property meet standard.Rational thermal treatment process can ensure that steel plate has uniform microtexture, thus ensures that steel plate has the indexs such as good normal tensile property, low-temperature flexibility, ensures the security that steel plate is using.
Midium-carbon steel need possess higher security, has both good economy practicality simultaneously.
Summary of the invention
Technical problem to be solved by this invention, be exactly for the deficiency existing for prior art, and the high strength steel plate providing a kind of tensile strength to reach more than 800MPa and manufacture method thereof, the high strength steel plate cost of alloy that tensile strength involved by the program reaches more than 800MPa is low, tensile strength reaches more than 800MPa, with low cost, welding property is excellent; The tensile strength that the program provides simultaneously reaches the manufacture method of the high strength steel plate of more than 800MPa, adopts converter smelting, quenching+tempering thermal treatment, makes the tensile strength of steel reach more than 800MPa.
This programme is achieved by the following technical measures:
Tensile strength reaches the high strength steel plate of more than 800MPa, its component and each compositions in weight percentage are: carbon (C) 0.08 ~ 0.21%, silicon (Si) 0.15 ~ 0.45%, manganese (Mn) 0.70 ~ 1.10%, phosphorus (P)≤0.015%, sulphur (S)≤0.010%, chromium (Cr) 0.40 ~ 0.65%, molybdenum (Mo) 0.10 ~ 0.25%, vanadium (V) 0.030 ~ 0.080%, titanium (Ti) 0.010 ~ 0.030%, aluminium (Alt) 0.020 ~ 0.050%, boron (B) 0.0005 ~ 0.005%, surplus is iron and inevitable impurity.
Tensile strength reaches the high strength steel plate of more than 800MPa, its preferred version is, its component and each compositions in weight percentage are: carbon (C) 0.015 ~ 0.20%, silicon (Si) 0.15 ~ 0.35%, manganese (Mn) 0.80 ~ 1.00%, phosphorus (P)≤0.015%, sulphur (S)≤0.010%, chromium (Cr) 0.40 ~ 0.60%, molybdenum (Mo) 0.10 ~ 0.20%, vanadium (V) 0.030 ~ 0.050%, titanium (Ti) 0.015 ~ 0.030%, aluminium (Alt) 0.020 ~ 0.050%, boron (B) 0.0008 ~ 0.003%, surplus is iron and inevitable impurity.
Tensile strength reaches the high strength steel plate of more than 800MPa, and preferred embodiment is, its component and each compositions in weight percentage are: carbon (C) 0.17%, silicon (Si) 0.23%, manganese (Mn) 0.90%, phosphorus (P) 0.012%, sulphur (S) 0.004%, chromium (Cr) 0.50%, molybdenum (Mo) 0.16%, vanadium (V) 0.05%, titanium (Ti) 0.016%, aluminium (Alt) 0.030%, boron (B) 0.0015%, surplus is iron and inevitable impurity.
Described tensile strength reaches the high strength steel plate of more than 800MPa, and its thickness is not more than 40mm.
Tensile strength reaches the manufacture method of the high strength steel plate of more than 800MPa, comprises following step: molten iron pretreatment desulfurizing, dephosphorization, LF+VD/RH refining, sheet billet continuous casting, slab stacking slow cooling and reheat, dephosphorize by high pressure water, slab rolling, steel plate stacking slow cooling, quenching+tempering thermal treatment; Smelting endpoint carbon content target is 0.06 ~ 0.10%, P≤0.008%, two slag-stopping tapping; Deoxidation alloying, in CAS argon blowing time >=10 minute after tapping, dark desulfurization is carried out at LF refining furnace, each alloying element is finely tuned to target and adds ferrotianium, carry out Fruit storage at VD/RH stove, fidelity sky 15 ~ 20min, after process terminates, feed calcium iron wire, add ferro-boron, soft argon blowing time >=15min.
Tensile strength reaches the manufacture method of the high strength steel plate of more than 800MPa, and its preferred version is: comprise following step: molten iron pretreatment desulfurizing, dephosphorization, LF+VD/RH refining, sheet billet continuous casting, slab stacking slow cooling and reheat, dephosphorize by high pressure water, slab rolling, steel plate stacking slow cooling, quenching+tempering thermal treatment; Smelting endpoint carbon content target is 0.06 ~ 0.10%, P≤0.008%, two slag-stopping tapping; Deoxidation alloying, in CAS argon blowing time >=10 minute after tapping, dark desulfurization is carried out at LF refining furnace, each alloying element is finely tuned to target and adds ferrotianium, carry out Fruit storage at VD/RH stove, fidelity sky 15 ~ 20min, after process terminates, feed calcium iron wire, add ferro-boron, soft argon blowing time >=15min.The method also comprises the quenching+tempering thermal treatment after steel plate stacking slow cooling, the heat treated concrete steps of described quenching+tempering are: steel plate quenching temperature 800 ~ 1000 DEG C, time inside furnace 1.0 ~ 3.0min/mm, soaking time 10 ~ 20min, steel plate tempering temperature 500 ~ 700 DEG C, time inside furnace 1.0 ~ 3.0min/mm, tempering insulation time 10 ~ 20min, steel plate come out of the stove after air cooling.
Tensile strength reaches the manufacture method of the high strength steel plate of more than 800MPa, and its preferred version is: comprise the following steps:
A. hot metal pretreatment: make wherein sulphur take off to 0.002-0.005%, the bright face of molten iron is greater than 90%, molten iron temperature 1250 ~ 1350 DEG C, arsenic (As)≤0.006% in molten iron through KR dark desulfurization pre-treatment and after skimming;
B. converter smelting and deoxidation alloying, re-blows when carbon 0.20% once, and endpoint carbon content target is 0.06-0.10%, P≤0.008%, and tapping temperature target is 1600-1630 DEG C; Adopt the two slag-stopping tapping of floating plug, scum rod; Molybdenum-iron adds converter with steel scrap, and tapping process adds aluminium ferromanganese, lime, fluorite make top slag; Add silicomanganese successively, aluminium ferromanganese, ferrochrome, vanadium iron carry out alloying, tapping process argon blowing time 10-15 minute;
C. refining: LF adopts and makes white slag mode in early days, adds fine setting alloy according to composition, and heating end adds ferrotianium; VD/RH vacuum-treat: vacuum tightness is not more than 1.5mbar, protects vacuum time 15 ~ 20 minutes, rear hello calcium iron wire, and add ferro-boron, after line feeding, argon blowing time is not less than 15 minutes;
D. sheet billet continuous casting: pulling speed of continuous casting 0.8-1.5m/min, full argon shield casting, process nitrogen pick-up is not more than 0.0015%;
E. slab stacking slow cooling and reheating: to continuously cast bloom stacking slow cooling more than 48 hours, heat afterwards, heat-up time, after heating, tapping temperature controlled at 1120-1170 DEG C according to 8-10min/cm;
F. dephosphorize by high pressure water and slab rolling: continuously cast bloom heats the dephosphorization of laggard horizontal high voltage water, start rolling temperature 1050 ~ 1090 DEG C, hot stage adds heavy reduction and improves distortion rate of permeation, reduces last pass, the finish rolling stage stops in perfect recrystallization district, finishing temperature 900 ~ 950 DEG C;
H. steel plate rolls rear employing stacking slow cooling technique, ensures the precipitation of hydrogen and the homogenizing of microtexture in steel;
I. steel plate quenching temperature 800 ~ 1000 DEG C, time inside furnace 1.0 ~ 3.0min/mm, soaking time 10 ~ 20min, steel plate tempering temperature 500 ~ 700 DEG C, time inside furnace 1.0 ~ 3.0min/mm, tempering insulation time 10 ~ 20min, steel plate come out of the stove after air cooling.
Tensile strength reaches the manufacture method of the high strength steel plate of more than 800MPa, its preferred version is, step I in such scheme is operated by following processing condition, the quenching temperature of steel plate is 850 ~ 950 DEG C, time inside furnace 1.5 ~ 2.5min/mm, soaking time 12 ~ 18min, steel plate tempering temperature 550 ~ 700 DEG C, time inside furnace 1.2 ~ 1.5min/mm, tempering insulation time 12 ~ 18min.
Described step I optimum operation is, the quenching temperature of steel plate is 915 DEG C, time inside furnace 2min/mm, soaking time 16min, steel plate tempering temperature 650 DEG C, time inside furnace 1.5min/mm, tempering insulation time 14min.
The beneficial effect of this programme can be learnt according to describing of such scheme, the high strength steel plate cost of alloy that tensile strength reaches more than 800MPa is low, tensile strength reaches more than 800MPa,-20 DEG C of transverse impact merits are not less than 34J, relative reduction in area is not less than 45%, side swell increment is not less than 0.38mm, with low cost, welding property is excellent.The tensile strength that the program provides simultaneously reaches the manufacture method of the high strength steel plate of more than 800MPa, adopts converter smelting, quenching+tempering thermal treatment, makes the tensile strength of steel reach more than 800MPa.As can be seen here, the present invention compared with prior art, has outstanding substantive distinguishing features and marked improvement, and its beneficial effect implemented also is apparent.
Accompanying drawing explanation
Fig. 1 is steel plate (thickness 1/4 place, 500 times) the metallographic structure photo of the embodiment of the present invention 1.
Fig. 2 is steel plate (thickness 1/4 place, 500 times) the metallographic structure photo of the embodiment of the present invention 1.
Fig. 3 is steel plate (thickness 1/4 place, 500 times) the metallographic structure photo of the embodiment of the present invention 1.
Embodiment
For the technical characterstic of this programme can be clearly demonstrated, below by an embodiment, and in conjunction with its accompanying drawing, this programme is set forth.
Embodiment 1: the thickness producing steel plate is 32mm.
Adopt KR molten iron pretreatment desulfurizing, sulphur content 0.003% after process, molten iron temperature 1270 DEG C, arsenic content 0.003%;
Converter smelting: endpoint carbon content target is 0.08%, P:0.006%, S:0.008%.Tapping temperature target is 1620 DEG C; Adopt the two slag-stopping tapping of floating plug, scum rod; Molybdenum-iron adds converter with steel scrap, and tapping process adds aluminium ferromanganese, lime, fluorite make top slag; Add silicomanganese successively, aluminium ferromanganese, ferrochrome, vanadium iron carry out alloying, tapping process argon blowing time 13 minutes;
LF refining: temperature of arriving at a station 1530 DEG C, out-station temperature 1650 DEG C.Heat-up time 30min, treatment cycle 58min.
VD refining: protect vacuum time 15min, vacuum tightness 0.6mbr.Feed calcium iron wire after VD/RH, add soft blow argon 20min after ferro-boron, soft blow process molten steel face is without exposed;
Continuous casting: pulling rate is 1.1m/min, full argon shield casting;
The chemical composition that heat analysis obtains steel plate is: C:0.17%, Si:0.22%, Mn:0.84%, P:0.015%, S:0.006%, Cr:0.44%, Mo:0.23%, V:0.049%, B:0.0023%, Ti:0.020%, Alt:0.022%;
Slab rolls off the production line stacking slow cooling 60h.
Continuously cast bloom heating: heat-up time 240min, tapping temperature 1154 DEG C.
Start rolling temperature: 1048 DEG C, finishing temperature: 932 DEG C;
Steel plate quenching+tempering process: quenching temperature 910 DEG C, at stove 64min heat-up time, water-cooled after soaking time 16 min; Tempering temperature 650 DEG C, at stove 64min heat-up time, soaking time 16 min, steel plate come out of the stove after air cooling.
Embodiment 2: the steel plate thickness involved by the present embodiment is 20mm;
Smelting molten steel and continuously cast bloom production technique are with embodiment 1, and continuously cast bloom reheats: 235 minutes heat-up times, tapping temperature 1160 DEG C.Start rolling temperature: 1064 DEG C.Finishing temperature: 930 DEG C.Steel plate quenching temperature 910 DEG C, time inside furnace 40min, soaking time is water-cooled after 15 minutes; Tempering temperature 650 DEG C, time inside furnace 40min, soaking time 16 min, steel plate come out of the stove after air cooling.
By the component of aforesaid method gained steel plate with embodiment 1.
Embodiment 3: the steel plate thickness involved by the present embodiment is 16mm;
Smelting molten steel and continuously cast bloom production technique are with embodiment 1, and continuously cast bloom reheats: 256 minutes heat-up times, tapping temperature 1145 DEG C.Start rolling temperature: 1055 DEG C.Finishing temperature: 925 DEG C.Steel plate quenching temperature 910 DEG C, time inside furnace 35min, soaking time is water-cooled after 15 minutes; Tempering temperature 650 DEG C, time inside furnace 35min, soaking time 15 min, steel plate come out of the stove after air cooling.
By the component of aforesaid method gained steel plate with embodiment 1.
Normal tensile property is as shown in table 1.
Low temperature impact test: carry out low temperature impact test at-20 DEG C, shock test adopts v-notch, and Impulse Test Result is as shown in table 2.
According to GB/T10561-2005 standard, analyze the inclusion behavior of steel plate, result is as shown in table 3.
The present invention can pass through existing techniques in realizing without the technical characteristic described, and does not repeat them here.Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (2)
1. a tensile strength reaches the high strength steel plate of more than 800MPa, it is characterized in that: its component and each compositions in weight percentage are: carbon (C) 0.08 ~ 0.21%, silicon (Si) 0.15 ~ 0.45%, manganese (Mn) 0.70 ~ 1.10%, phosphorus (P)≤0.015%, sulphur (S)≤0.010%, chromium (Cr) 0.40 ~ 0.65%, molybdenum (Mo) 0.10 ~ 0.25%, vanadium (V) 0.030 ~ 0.080%, titanium (Ti) 0.010 ~ 0.030%, aluminium (Alt) 0.020 ~ 0.050%, boron (B) 0.0005 ~ 0.005%, surplus is iron and inevitable impurity.
2. tensile strength according to claim 1 reaches the high strength steel plate of more than 800MPa, it is characterized in that: its component and each compositions in weight percentage are: carbon (C) 0.17%, silicon (Si) 0.23%, manganese (Mn) 0.90%, phosphorus (P) 0.012%, sulphur (S) 0.004%, chromium (Cr) 0.50%, molybdenum (Mo) 0.16%, vanadium (V) 0.05%, titanium (Ti) 0.016%, aluminium (Alt) 0.030%, boron (B) 0.0015%, surplus is iron and inevitable impurity.
3. tensile strength according to any one of claim 1 to 2 reaches the high strength steel plate of more than 800MPa, it is characterized in that: the thickness of this steel plate is not more than 40mm.
4. tensile strength according to claim 1 reaches a manufacture method for the high strength steel plate of more than 800MPa, comprises following step: molten iron pretreatment desulfurizing, dephosphorization, LF+VD/RH refining, sheet billet continuous casting, slab stacking slow cooling and reheat, dephosphorize by high pressure water, slab rolling, steel plate stacking slow cooling, quenching+tempering thermal treatment; It is characterized in that: smelting endpoint carbon content target is 0.06 ~ 0.10%, P≤0.008%, two slag-stopping tapping; Deoxidation alloying, in CAS argon blowing time >=10 minute after tapping, dark desulfurization is carried out at LF refining furnace, each alloying element is finely tuned to target and adds ferrotianium, carry out Fruit storage at VD/RH stove, fidelity sky 15 ~ 20min, after process terminates, feed calcium iron wire, add ferro-boron, soft argon blowing time >=15min.
5. tensile strength according to claim 4 reaches the manufacture method of the high strength steel plate of more than 800MPa, it is characterized in that: the method also comprises the quenching+tempering thermal treatment after steel plate stacking slow cooling, the heat treated concrete steps of described quenching+tempering are: steel plate quenching temperature 800 ~ 1000 DEG C, time inside furnace 1.0 ~ 3.0min/mm, soaking time 10 ~ 20min, steel plate tempering temperature 500 ~ 700 DEG C, time inside furnace 1.0 ~ 3.0min/mm, tempering insulation time 10 ~ 20min, steel plate come out of the stove after air cooling.
6. described tensile strength according to claim 4 reaches the manufacture method of the high strength steel plate of more than 800MPa, it is characterized in that: comprise the following steps:
A. hot metal pretreatment: make wherein sulphur take off to 0.002-0.005%, the bright face of molten iron is greater than 90%, molten iron temperature 1250 ~ 1350 DEG C, arsenic (As)≤0.006% in molten iron through KR dark desulfurization pre-treatment and after skimming;
B. converter smelting and deoxidation alloying, endpoint carbon content target is 0.06-0.10%, P≤0.008%, and tapping temperature target is 1600-1630 DEG C; Adopt the two slag-stopping tapping of floating plug, scum rod; Molybdenum-iron adds converter with steel scrap, and tapping process adds aluminium ferromanganese, lime, fluorite make top slag; Add silicomanganese successively, aluminium ferromanganese, ferrochrome, vanadium iron carry out alloying, tapping process argon blowing time 10-15 minute;
C. refining: LF adopts and makes white slag mode in early days, adds fine setting alloy according to composition, and heating end adds ferrotianium; VD/RH vacuum-treat: vacuum tightness is not more than 1.5mbar, protects vacuum time 15 ~ 20 minutes, rear hello calcium iron wire, and add ferro-boron, after line feeding, argon blowing time is not less than 15 minutes;
D. sheet billet continuous casting: pulling speed of continuous casting 0.8-1.5m/min, full argon shield casting, process nitrogen pick-up is not more than 0.0015%;
E. slab stacking slow cooling and reheating: to continuously cast bloom stacking slow cooling more than 48 hours, heat afterwards, heat-up time, after heating, tapping temperature controlled at 1120-1170 DEG C according to 8-10min/cm;
F. dephosphorize by high pressure water and slab rolling: continuously cast bloom heats the dephosphorization of laggard horizontal high voltage water, start rolling temperature 1050 ~ 1090 DEG C, hot stage adds heavy reduction and improves distortion rate of permeation, reduces last pass, the finish rolling stage stops in perfect recrystallization district, finishing temperature 900 ~ 950 DEG C;
H. steel plate rolls rear employing stacking slow cooling technique, ensures the precipitation of hydrogen and the homogenizing of microtexture in steel;
I. steel plate quenching temperature 800 ~ 1000 DEG C, time inside furnace 1.0 ~ 3.0min/mm, soaking time 10 ~ 20min, steel plate tempering temperature 500 ~ 700 DEG C, time inside furnace 1.0 ~ 3.0min/mm, tempering insulation time 10 ~ 20min, steel plate come out of the stove after air cooling.
7. tensile strength according to claim 6 reaches the manufacture method of the high strength steel plate of more than 800MPa, it is characterized in that: described step I is operated by following processing condition, the quenching temperature of steel plate is 850 ~ 950 DEG C, time inside furnace 1.5 ~ 2.5min/mm, soaking time 12 ~ 18min, steel plate tempering temperature 550 ~ 700 DEG C, time inside furnace 1.2 ~ 1.5min/mm, tempering insulation time 12 ~ 18min.
8. tensile strength according to claim 6 reaches the manufacture method of the high strength steel plate of more than 800MPa, it is characterized in that: described step I is operated by following processing condition, the quenching temperature of steel plate is 915 DEG C, time inside furnace 2min/mm, soaking time 16min, steel plate tempering temperature 650 DEG C, time inside furnace 1.5min/mm, tempering insulation time 15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310083287.4A CN103131956B (en) | 2013-03-15 | 2013-03-15 | High-strength steel plate with tensile strength of 800 MPa above and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310083287.4A CN103131956B (en) | 2013-03-15 | 2013-03-15 | High-strength steel plate with tensile strength of 800 MPa above and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103131956A CN103131956A (en) | 2013-06-05 |
| CN103131956B true CN103131956B (en) | 2015-05-27 |
Family
ID=48492402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310083287.4A Expired - Fee Related CN103131956B (en) | 2013-03-15 | 2013-03-15 | High-strength steel plate with tensile strength of 800 MPa above and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103131956B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320696B (en) * | 2013-06-06 | 2015-07-29 | 济钢集团有限公司 | A kind of Low-alloy heat-resistant steel plate and manufacture method thereof |
| CN103422020B (en) * | 2013-09-05 | 2015-05-20 | 济钢集团有限公司 | Steel plate for punching-welding axle housing and manufacturing method thereof |
| CN103469066B (en) * | 2013-09-09 | 2015-08-12 | 济钢集团有限公司 | A kind of utilize plate mill to produce high-mouldability energy steel plate method and obtained steel plate |
| CN103422023B (en) * | 2013-09-11 | 2016-01-20 | 济钢集团有限公司 | A kind of chrome molybdenum heat-resisting steel sheet and plate and manufacture method thereof |
| CN103451526B (en) * | 2013-09-11 | 2015-09-30 | 济钢集团有限公司 | A kind of 6-8mm high strength structure plate and manufacture method thereof |
| CN105002435B (en) * | 2015-09-09 | 2017-06-20 | 山东钢铁股份有限公司 | A kind of high-strength tenacity anti-corrosion steel plate and its manufacture method |
| CN106399840A (en) * | 2016-09-18 | 2017-02-15 | 舞阳钢铁有限责任公司 | Low-cost and low-yield-ratio hardening and tempering type Q690E steel plate and production method |
| CN109504897A (en) * | 2018-11-05 | 2019-03-22 | 江阴兴澄特种钢铁有限公司 | A kind of big thickness water power steel of 80kg grades of low-carbon-equivalent low-crackle sensitive and its manufacturing method |
| CN112126862A (en) * | 2020-09-25 | 2020-12-25 | 湖南华菱湘潭钢铁有限公司 | Production method of steel for CAP passive nuclear power plant nuclear-grade mechanical module |
| CN113088812B (en) * | 2021-03-15 | 2022-12-06 | 山东钢铁股份有限公司 | High-strength-toughness ultralow-temperature impact-resistant tubing head forging blank and manufacturing method thereof |
| CN116024499B (en) * | 2022-12-28 | 2024-06-25 | 燕山大学 | Steel for 10.9-grade bolt resistant to hydrogen-induced delayed fracture and preparation method of 10.9-grade bolt |
| CN116640997A (en) * | 2023-06-15 | 2023-08-25 | 南京钢铁股份有限公司 | Economical 690 Pa-grade quenched and tempered high-strength steel plate without niobium and manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776441A (en) * | 2012-08-10 | 2012-11-14 | 济钢集团有限公司 | Steel plate for third-generation nuclear power station reactor containments and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005126733A (en) * | 2003-10-21 | 2005-05-19 | Nippon Steel Corp | Steel sheet for hot press having excellent hot workability, and automotive member |
-
2013
- 2013-03-15 CN CN201310083287.4A patent/CN103131956B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776441A (en) * | 2012-08-10 | 2012-11-14 | 济钢集团有限公司 | Steel plate for third-generation nuclear power station reactor containments and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103131956A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103131956B (en) | High-strength steel plate with tensile strength of 800 MPa above and manufacturing method thereof | |
| CN103320696B (en) | A kind of Low-alloy heat-resistant steel plate and manufacture method thereof | |
| CN103911559B (en) | A kind of nuclear plant pressure vessels steel plate and manufacture method thereof | |
| CN102965588B (en) | Low-alloy high-strength cast steel, and smelting and heat treatment method thereof | |
| CN101928885B (en) | Hydrothion corrosion resistant pipe steel and production method thereof | |
| CN101705423A (en) | Low-cost steel plate for building structure and manufacturing method thereof | |
| CN103160733A (en) | Steel plate for nuclear power station pressure vessel and equipment gate, and manufacturing method thereof | |
| CN102345045B (en) | A514GrQ steel plate for offshore platform rack | |
| CN110358973B (en) | Low-cost S420NL low-temperature toughness steel plate and manufacturing method thereof | |
| CN102312160B (en) | 12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and production method thereof | |
| CN103710628A (en) | Large-thickness hydrogenating 14Cr1MoR steel plate and production method thereof | |
| CN103361561B (en) | The preparation method of coupling material weldless steel tube | |
| CN103173679A (en) | 100mm Q460qE bridge steel plate and production method thereof | |
| CN102776441A (en) | Steel plate for third-generation nuclear power station reactor containments and manufacturing method thereof | |
| CN103710620B (en) | A kind of heavy thickness steel plate for low temperature pressure container and production technique thereof | |
| CN104762545A (en) | Extra-thick high-strength steel plate production method | |
| CN104561837A (en) | Steel plate made of pressure vessel steel ASTMA387CL11Gr2 and production method thereof | |
| CN104674130A (en) | Method for producing large-thickness lamination-crack-resistant tempered high-strength steel plate | |
| CN103725967A (en) | SCMV4-2 pressure vessel steel plate with specification of below 120mm and production method of steel plate | |
| CN102367541A (en) | 65mm Q345GJCZ35 steel plate and production method thereof | |
| CN102260835A (en) | Nuclear power steel 18MnNiMo and its preparation method | |
| CN103114254A (en) | High-toughness steel plate for mechanical module supporting member of nuclear power plant and manufacturing method of steel plate | |
| CN107557662A (en) | Hardened and tempered 800 MPa-grade low-cost easily-welded thick steel plate and production method thereof | |
| CN103160728A (en) | High-yield-strength S890QL structural steel medium plate and production method thereof | |
| CN102041443A (en) | Low-alloy Q345D-Z25 medium plate and production process 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20190315 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |