CN101451221A - High-strength steel plate and method for producing the same - Google Patents
High-strength steel plate and method for producing the same Download PDFInfo
- Publication number
- CN101451221A CN101451221A CNA2007101930277A CN200710193027A CN101451221A CN 101451221 A CN101451221 A CN 101451221A CN A2007101930277 A CNA2007101930277 A CN A2007101930277A CN 200710193027 A CN200710193027 A CN 200710193027A CN 101451221 A CN101451221 A CN 101451221A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- percent
- steel
- vacuum
- high tensile
- 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
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a 110Kg level high tensile steel plate with the yield strength not less than 960MPa. The steel plate comprises the following chemical components by weight percentage: 0.14 to 0.18 percent of C, 0.20 to 0.50 percent of Si, 0.90 to 1.30 of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.010 percent of S, 0.70 to 0.10 percent of Ni, 0.04 to 0.08 percent of V, 0.020 to 0.060 percent of Nb, 0.020 to 0.060 percent of Al, 0.30 to 0.80 percent of Cr, 0.30 to 0.60 percent of Mo, 0.010 to 0.030 percent of Ti, 0.0010 to 0.0030 percent of B, and the balance being Fe and inevitable impurities. Through the reasonable design of alloy components and mainly the control on quenching and tempering process, the thickness of the obtained steel plate can reach 80mm. The steel plate has high yield strength, high welding performance, high cold bending performance, good low temperature toughness, good steel plate profile, and excellent comprehensive performance. The steel plate can be widely applied to the manufacturing of engineering machinery and has bright application prospect.
Description
(1) technical field
The present invention relates to a kind of engineering machinery high tensile steel plate and preparation method thereof, particularly the 110kg level yield strength is not less than the high-strength engineering machinery steel plate of 960Mpa.
(2) background technology
Development along with the development of the national economy, market increases day by day to high-yield strength such as other hardening high-strength steel demand of 590MPa higher level, and particularly industries such as coal mine machinery, engineering machinery, water power, bridge have proposed very high requirement to mechanical property, the welding property of steel.
Large-thickness hardening high-strength steel field requires always in continuous increase the intensity rank of steel, be increased to 100Kg, 110Kg gradually from 50Kg, 60Kg, other high-strength steel of 110Kg level particularly, existing many unsatisfactory places aspect obdurability coupling, welding property, the steel plate processing thickness at present, for example steel plate processing thickness also can't be broken through 50mm at present.
(3) summary of the invention
The object of the present invention is to provide a kind of high tensile steel plate (110Kg level), intensity height, good toughness, good welding performance, the thickness work range is big, can be machined to 80mm.
The technical solution used in the present invention is as follows:
High tensile steel plate, chemical ingredients by weight percentage is composed as follows:
C 0.14～0.18%, and Si 0.20～0.50%, and Mn 0.90～1.30%, P≤0.020%, S≤0.010%, Ni 0.70～0.10%, V 0.04～0.08%, Nb 0.020～0.060%, and Al 0.020～0.060%, and Cr 0.30～0.80%, Mo 0.30～0.60%, Ti 0.010～0.030%, and B 0.0010～0.0030%, and surplus is Fe and unavoidable impurities.
Preferably, each chemical ingredients of described high tensile steel plate is composed as follows:
C 0.15～0.17%, and Si 0.20～0.40%, and Mn 1.05～1.15%, P≤0.015%, S≤0.005%, Ni 0.80～0.90%, V 0.045～0.055%, Nb 0.020～0.030%, and Al 0.020～0.045%, and Cr 0.30～0.40%, Mo 0.50～0.60%, Ti 0.010～0.020%, and B 0.0020～0.0030%, and surplus is Fe and unavoidable impurities.
Described high tensile steel plate, yield strength is not less than 960Mpa, and thickness range is 8～80mm.
The chemical composition design that steel plate of the present invention adopts, carbon equivalent is low, and P, S content are low, and steel is pure; The noble metal content that adds is few, and cost is low; Design of alloy is reasonable, can guarantee steel plate hardening capacity under the condition of low-carbon (LC), low-carbon-equivalent, makes steel plate have good obdurability, welding property.
Wherein, the effect in the present invention of each chemical ingredients and content is:
C 0.15～0.17%: carbon produces remarkably influenced to intensity, low-temperature impact toughness, the welding property of steel.Carbon content is crossed the low NbC growing amount that can make and is reduced, and influences the controlled rolling effect, also can increase and smelt the control difficulty; Carbon content is too high, then can influence the welding property and the atmospheric corrosion resistance ability of steel.
Si 0.20～0.40%: as reductive agent and reductor, combinations such as silicon and molybdenum, chromium have the erosion resistance of raising and oxidation resistant effect, surpass at 0.5% o'clock in steelmaking process, can cause the toughness of steel to descend, and reduce the welding property of steel.
Mn 1.05～1.15%: manganese is with low cost, can increase toughness, intensity and the hardness of steel, improves the hardening capacity of steel, improves the hot workability of steel; But the manganese amount is too high, can weaken the resistance to corrosion of steel, reduces welding property.
P≤0.015%, S≤0.005%: in the ordinary course of things, p and s all is a harmful element in the steel, increases the fragility of steel.Phosphorus degenerates welding property, reduces plasticity, and cold-bending property is degenerated; Sulphur reduces the ductility and the toughness of steel, is forging and causing when rolling crackle; Therefore should reduce the content of p and s in steel as far as possible.
Ni 0.80～0.90%: nickel can improve the intensity of steel, and keeps good plasticity and low-temperature flexibility.Nickel has higher corrosion resistance to soda acid, at high temperature has antirust and temperature capacity.But nickel belongs to noble metal, and consumption should be got a good trim point between performance and cost.
V 0.045～0.055%: vanadium is the good reductor of steel.But add vanadium thinning microstructure crystal grain in the steel, improve intensity and toughness.The carbide that vanadium and carbon form can improve anti-hydrogen-type corrosion ability under High Temperature High Pressure.
Nb 0.020～0.030%: the adding of niobium is in order to promote the grain refining of steel rolling microstructure, can improve intensity and toughness simultaneously, under the molybdenum existence condition, niobium can pass through to suppress the effective refinement microstructure of austenite recrystallization in the controlled rolling process, and improves hardening capacity by precipitation strength.Niobium can reduce the superheated susceptivity and the temper brittleness of steel.In the welding process, the alligatoring that gathers and separate out austenite crystal in the time of can hindering heating partially of niobium, boron atom, and guarantee to obtain more tiny heat affected zone tissue after the welding, improve welding property.
Ti 0.010～0.020%: can form carbon, the oxynitride particle of tiny titanium, can obtain comparatively tiny austenitic microstructure by the alligatoring that stops austenite crystal in slab reheat process.The existence of the nitride particles of titanium can suppress the grain coarsening of welded heat affecting zone.Titanium can improve the low-temperature flexibility of matrix metal and welded heat affecting zone simultaneously, has stoped the disadvantageous effect of nomadic nitrogen to the hardening capacity generation of steel.
Al 0.020～0.045%: aluminium is reductor commonly used in the steel, and adds a spot of aluminium in the steel, but crystal grain thinning improves impelling strength.Aluminium also has oxidation-resistance and corrosion resistance, and aluminium and chromium, silicon share, and can significantly improve the high temperature non-scale performance of steel and the ability of high-temperature corrosion resistance, but too high hot workability, welding property and the machinability that then influences steel.
Mo 0.50～0.60%: molybdenum is present in the sosoloid and carbide of steel, and the solution strengthening effect is arranged, and can improve the hardening capacity of steel.In boron-containing steel, molybdenum is particularly remarkable to the influence of hardening capacity.When molybdenum and niobium add fashionablely simultaneously, molybdenum can promote the refinement of austenitic microstructure in the controlled rolling process.But the toughness of the heat affected zone that forms when too much molybdenum can damage welding, the weldability and the cost height of reduction steel.
B 0.0020～0.0030%: the boron that adds trace in the steel can improve the compactness and the hot rolling performance of steel, improves steel plate hardening capacity, improves intensity.
Cr 0.30～0.40%: chromium can significantly improve intensity, hardness and the wear resistance of steel, but reduces plasticity and toughness simultaneously.
The present invention also provides a kind of preparation method with steel plate of above-mentioned chemical ingredients composition and yield strength, may further comprise the steps:
1) molten steel that will contain the proportioning chemical ingredients carries out electrosmelting, the refining of LF stove, VD vacuum-treat, the feeding aluminum steel is 400～500 meters during refining, add the SiCa reductor according to 0.5-1kg/ ton steel before the vacuum, the VD vacuum-treat is not more than in vacuum tightness under the condition of 0.5 torr and keeps 20min at least;
2) molten steel after the step 1) vacuum-treat is cast at 1560～1570 ℃;
3) at 1200～1240 ℃ of heating 8-9min/mm;
4) be rolled at 950～1100 ℃, reduction in pass is 10～30%, and the accumulative total draft is not less than 70%, and the road number of times is advisable with the 4-6 passage; Rolling once more, start rolling temperature is not higher than 930 ℃, and finishing temperature is not higher than 850 ℃, and the accumulative total draft is not less than 30%;
5) carry out quench treatment, water-cooled behind 895～920 ℃ of insulation 2.0-2.5min/mm, quench roller speed is 2～25m;
6) 600～610 ℃ of temper, be 4～6min/mm heat-up time, air cooling.
Preferably, in said process, carry out carrying out Shot Blasting to guarantee that surface of steel plate is good before the quench treatment.
The operation of described step 1) can reduce nonmetallic inclusionsin steel, harmful element content to greatest extent, guarantees the purity of molten steel, specifically can carry out in 90 tons of UHP electric furnaces;
Step 2) in,, selects the casting of continuous caster or steel ingot according to the different size of steel plate;
Be to adopt II type controlled rolling process in the step 4), rolling purpose of fs is to make austenite generation perfect recrystallization, with refine austenite crystal grain; Subordinate phase is the non-recrystallize stage of austenite.Adopt II type cooling controlling and rolling controlling process, solved the mill milling insufficient pressure and the thick inequality of crystal grain, the impelling strength that cause lower phenomenon;
In the step 5), quenching is a kind of complicated heat treatment technology, is one of critical process of decision quality product, produces serious deformation and cracking when obtaining tiny martensitic stucture after preventing to quench, should reasonably determine quenching heating and cooling method in conjunction with C curve according to the composition of steel;
During quenching, add the preferred 2.3min/mm of time of thermal control, the selection of cooling water amount and roller speed can be carried out with reference to table 1.
The back steel plate that quenches is a full thickness martensite, studies show that the armor plate strength rank height of full thickness martensitic stucture than mixed structure.
Table 1
| Steel plate thickness mm | Water yield t/h | Quench roller speed m |
| 12-20 | 5200-6400 | 12-16 |
| 20-30 | 8000 | 10-16 |
| 35-45 | 8000 | 4 |
| ≥50 | 8000 | 2 |
In the step 6), the tempered purpose is to reduce the fragility of hardened steel, reduces or eliminates internal stress, tissue is tended towards stability and obtains needed performance, and heat-up time, preferred 4.5min/mm organized based on tempering troostite after the tempering.
The present invention has following advantage with respect to prior art:
Present method adds it mainly is the control of quenching and tempering process by the appropriate design to alloying constituent, the steel plate of the 110Kg level that makes, and thickness can reach 80mm, and the yield strength height is not less than 960Mpa; Carbon equivalent is low, between 0.57～0.62%, and good welding performance; Cold-bending property is good, and the resilience of not ftractureing during the material making has alleviated labour intensity, saves man-hour and the utilization ratio that has improved material; Low-temperature flexibility is good, can guarantee-20 ,-40 ℃ of uses, and steel plate impelling strength also has sizable rich amount; The steel plate template is good, and roughness≤5mm/m has excellent comprehensive performances.High tensile steel plate of the present invention can be widely used in the engineering machinery manufacturing, has a extensive future.
(4) embodiment:
Below with specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto:
Embodiment 1
High tensile steel plate, thickness 80mm, its chemical ingredients consists of: C 0.16%, Si 0.35%, and Mn 1.10%, and P 0.010%, S 0.003%, Ni0.85%, and V 0.053%, Nb 0.029%, and Al 0.040%, and Cr 0.40%, Mo 0.59%, Ti 0.018%, and B 0.0026%, and all the other are iron and unavoidable impurities.Carbon equivalent is 0.60%, its mechanical property: yield strength 990MPa, tensile strength: 1050Mpa;-20 ℃ of ballistic work AKV (vertically) 60,58,49J ,-40 ℃ of ballistic work AKV (vertically) 36,39,40J; Clod wash d=3a.
Prepare according to following step:
(1) smelting technology: the molten steel that will contain above-mentioned each weight percentage Chemical Composition is smelted in 90 tons of UHP electric furnaces earlier, sends into the refining of LF refining furnace then, feeds 500 meters on Al line, and refining process guarantees that refining slag is white, to guarantee deoxidation effect; The vacuum-treat of bull ladle VD stove added SiCa piece 90kg after refining finished before the vacuum, and vacuum tightness is not more than 0.5 torr, keeps 25 minutes;
(2) casting: after the vacuum breaking, 1570 ℃ are adopted the casting of 27t steel ingot;
(3) heating: at 1220 ℃ of heating 9min/mm;
(4) rolling: adopt II type controlled rolling process, the fs is rolling between 950～1000 ℃, and this stage reduction in pass is 25%, and the accumulative total draft is 75%; The subordinate phase start rolling temperature is 910 ℃, and finishing temperature is 840 ℃, and the accumulative total draft is 35%;
(5) ball blast: the steel plate after rolling carries out Shot Blasting and guarantees that surface of steel plate is good;
(6) quench: to steel plate quenching, Heating temperature is 920 ℃ to steel plate before modified line behind the ball blast, heating 2.3min/mm, and with maximum amount of water 8000t/h cooling, quench roller speed is 2m, obtains the full thickness martensite steel plate after the quenching;
(7) tempering: the 600 ℃ of tempering of back steel plate of quenching, be 4.5min/mm total heat-up time, steel plate air cooling after the tempering.
Embodiment 2
High tensile steel plate, thickness 12mm, its chemical ingredients consists of: C 0.15%, Si 0.30%, and Mn 1.05%, and P 0.008%, S 0.004%, and Ni 0.80%, and V 0.055%, Nb 0.025%, and Al 0.035%, and Cr 0.38%, Mo 0.55%, Ti 0.015%, and B 0.0022%, and all the other are iron and unavoidable impurities.Carbon equivalent is 0.58%, its mechanical property: yield strength 975MPa, tensile strength: 1040Mpa;-20 ℃ of ballistic work AKV (vertically) 100,89,79J ,-40 ℃ of ballistic work AKV (vertically) 40,50,54J; Clod wash d=3a is good.The welding of 12mm Plate Steel does not need preheating, and welding property is good.
Prepare according to following step:
(1) smelting technology: the molten steel that will contain above-mentioned each weight percentage Chemical Composition is smelted in 90 tons of UHP electric furnaces earlier, sends into the refining of LF refining furnace then, feeds 450 meters on Al line, and refining process guarantees that refining slag is white, to guarantee deoxidation effect; The vacuum-treat of bull ladle VD stove added SiCa piece 75kg after refining finished before the vacuum, and vacuum tightness is not more than 0.5 torr, keeps 23 minutes;
(2) casting: after the vacuum breaking, 1570 ℃ are adopted the casting of 250 X 1800mm continuous casters;
(3) heating: at 1215 ℃ of heating 8min/mm;
(4) rolling: adopt II type controlled rolling process, the fs is rolling carries out between 950～1000 ℃, and this stage reduction in pass is 27%, and the accumulative total draft is 80%; The subordinate phase start rolling temperature is 920 ℃, and finishing temperature is 850 ℃, and the accumulative total draft is 37%;
(5) ball blast: the steel plate after rolling carries out Shot Blasting and guarantees that surface of steel plate is good;
(6) quench: to steel plate quenching, Heating temperature is 920 ℃ to steel plate before modified line behind the ball blast, heating 2.3min/mm, and with water yield 5200t/h cooling, quench roller speed is 16m, obtains the full thickness martensite steel plate after the quenching;
(7) tempering: the 600 ℃ of tempering of back steel plate of quenching, be 4.5min/mm total heat-up time, steel plate air cooling after the tempering.
Embodiment 3:
High tensile steel plate, thickness 20mm, its chemical ingredients consists of: C 0.17%, Si 0.25%, and Mn 1.10%, and P 0.012%, S 0.003%, and Ni 0.87%, and V 0.049%, Nb 0.027%, and Al 0.040%, and Cr 0.35%, Mo 0.57%, Ti 0.018%, and B 0.0028%, and all the other are iron and unavoidable impurities.Carbon equivalent is 0.59%, its mechanical property: yield strength 990MPa, tensile strength: 1070Mpa;-20 ℃ of ballistic work AKV (vertically) 70,69,80J ,-40 ℃ of ballistic work AKV (vertically) 35,40,45J; Clod wash d=3a is good.
Prepare according to following step:
(1) smelting technology: the molten steel that will contain above-mentioned each weight percentage Chemical Composition is smelted in 90 tons of UHP electric furnaces earlier, sends into the refining of LF refining furnace then, feeds 470 meters on Al line, and refining process guarantees that refining slag is white, to guarantee deoxidation effect; The vacuum-treat of bull ladle VD stove added SiCa piece 90kg after refining finished before the vacuum, and vacuum tightness is not more than 0.5 torr, keeps 20 minutes;
(2) casting: after the vacuum breaking, 1570 ℃ are adopted the casting of 250 X 1800mm continuous casters;
(3) heating: at 1215 ℃ of heating 8min/mm;
(4) rolling: adopt II type controlled rolling process, the fs is rolling carries out between 950～1000 ℃, and this stage reduction in pass is 25%, and the accumulative total draft is 70%; The subordinate phase start rolling temperature is 920 ℃, and finishing temperature is 850 ℃, and the accumulative total draft is 35%;
(5) ball blast: the steel plate after rolling carries out Shot Blasting and guarantees that surface of steel plate is good;
(6) quench: to steel plate quenching, Heating temperature is 920 ℃ to steel plate before modified line behind the ball blast, heating 2.3min/mm, and with water yield 6400t/h cooling, quench roller speed is 12m, obtains the full thickness martensite steel plate after the quenching;
(7) tempering: the 600 ℃ of tempering of back steel plate of quenching, be 4.5min/mm total heat-up time, steel plate air cooling after the tempering.
Claims (5)
1. high tensile steel plate, it is characterized in that described steel plate chemical ingredients by weight percentage is composed as follows: C 0.14～0.18%, and Si 0.20～0.50%, Mn 0.90～1.30%, P≤0.020%, S≤0.010%, Ni 0.70～0.10%, and V 0.04～0.08%, and Nb 0.020～0.060%, Al 0.020～0.060%, Cr 0.30～0.80%, and Mo 0.30～0.60%, and Ti 0.010～0.030%, B 0.0010～0.0030%, and surplus is Fe and unavoidable impurities.
2. high tensile steel plate as claimed in claim 1, it is characterized in that each chemical ingredients is composed as follows: C 0.15～0.17%, and Si 0.20～0.40%, Mn 1.05～1.15%, P≤0.015%, S≤0.005%, Ni 0.80～0.90%, and V 0.045～0.055%, and Nb 0.020～0.030%, Al 0.020～0.045%, Cr 0.30～0.40%, and Mo 0.50～0.60%, and Ti 0.010～0.020%, B 0.0020～0.0030%, and surplus is Fe and unavoidable impurities.
3. high tensile steel plate as claimed in claim 1 or 2 is characterized in that described steel plate yield strength is not less than 960Mpa.
4. the preparation method of high tensile steel plate as claimed in claim 3 is characterized in that described preparation method may further comprise the steps:
1) molten steel that will contain the proportioning chemical ingredients carries out electrosmelting, the refining of LF stove, VD vacuum-treat, the feeding aluminum steel is 400～500 meters during refining, add the SiCa reductor according to 0.5-1kg/ ton steel before the vacuum, the VD vacuum-treat is not more than in vacuum tightness under the condition of 0.5 torr and keeps 20min at least;
2) molten steel after the step 1) vacuum-treat is cast at 1560～1570 ℃;
3) at 1200～1240 ℃ of heating 8-9min/mm;
4) be rolled at 950～1100 ℃, reduction in pass is 10～30%, and the accumulative total draft is not less than 70%; Rolling once more, start rolling temperature is not higher than 930 ℃, and finishing temperature is not higher than 850 ℃, and the accumulative total draft is not less than 30%;
5) carry out quench treatment, water-cooled behind 895～920 ℃ of insulation 2.0-2.5min/mm, quench roller speed is 2～25m;
6) 600～610 ℃ of temper, be 4～6min/mm heat-up time, air cooling.
5. the preparation method of high tensile steel plate as claimed in claim 4 is characterized in that carrying out carrying out Shot Blasting before the quench treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101930277A CN101451221A (en) | 2007-12-03 | 2007-12-03 | High-strength steel plate and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101930277A CN101451221A (en) | 2007-12-03 | 2007-12-03 | High-strength steel plate and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101451221A true CN101451221A (en) | 2009-06-10 |
Family
ID=40733709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101930277A Pending CN101451221A (en) | 2007-12-03 | 2007-12-03 | High-strength steel plate and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101451221A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935810A (en) * | 2010-08-06 | 2011-01-05 | 莱芜钢铁股份有限公司 | Method for manufacturing low-cost super-high intensity steel plate with yield strength of over 960 MPa for wide process operation window |
| CN102912078A (en) * | 2011-05-27 | 2013-02-06 | 芬可乐父子公司 | Minimum energy utilization electric arc furnace system and processes for making steel products |
| CN103114254A (en) * | 2013-03-15 | 2013-05-22 | 济钢集团有限公司 | High-toughness steel plate for mechanical module supporting member of nuclear power plant and manufacturing method of steel plate |
| CN105543689A (en) * | 2016-01-16 | 2016-05-04 | 舞阳钢铁有限责任公司 | Steel plate with shear strength above 1150 MPa and production method thereof |
| CN106244922A (en) * | 2016-08-31 | 2016-12-21 | 南京钢铁股份有限公司 | A kind of big thickness Q960E super-high strength steel production method |
| CN109023114A (en) * | 2018-09-29 | 2018-12-18 | 南京钢铁股份有限公司 | A kind of superelevation steel Q960E slab and manufacturing method |
| CN109112397A (en) * | 2018-08-14 | 2019-01-01 | 山东建筑大学 | A kind of 1400MPa grades of shellfish/horse complex phase automobile low-carbon Q&P steel Preparation Method |
-
2007
- 2007-12-03 CN CNA2007101930277A patent/CN101451221A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935810A (en) * | 2010-08-06 | 2011-01-05 | 莱芜钢铁股份有限公司 | Method for manufacturing low-cost super-high intensity steel plate with yield strength of over 960 MPa for wide process operation window |
| CN102912078A (en) * | 2011-05-27 | 2013-02-06 | 芬可乐父子公司 | Minimum energy utilization electric arc furnace system and processes for making steel products |
| CN103114254A (en) * | 2013-03-15 | 2013-05-22 | 济钢集团有限公司 | High-toughness steel plate for mechanical module supporting member of nuclear power plant and manufacturing method of steel plate |
| CN105543689A (en) * | 2016-01-16 | 2016-05-04 | 舞阳钢铁有限责任公司 | Steel plate with shear strength above 1150 MPa and production method thereof |
| CN106244922A (en) * | 2016-08-31 | 2016-12-21 | 南京钢铁股份有限公司 | A kind of big thickness Q960E super-high strength steel production method |
| WO2018040859A1 (en) * | 2016-08-31 | 2018-03-08 | 南京钢铁股份有限公司 | Large-thickness q960e ultra-high strength steel production method |
| CN106244922B (en) * | 2016-08-31 | 2018-12-11 | 南京钢铁股份有限公司 | A kind of big thickness Q960E super-high strength steel production method |
| EP3467136A4 (en) * | 2016-08-31 | 2019-06-05 | Nanjing Iron&Steel Co., Ltd. | Large-thickness q960e ultra-high strength steel production method |
| CN109112397A (en) * | 2018-08-14 | 2019-01-01 | 山东建筑大学 | A kind of 1400MPa grades of shellfish/horse complex phase automobile low-carbon Q&P steel Preparation Method |
| CN109023114A (en) * | 2018-09-29 | 2018-12-18 | 南京钢铁股份有限公司 | A kind of superelevation steel Q960E slab and manufacturing method |
| EP3859035A4 (en) * | 2018-09-29 | 2021-08-18 | Nanjing Iron & Steel Co., Ltd. | Ultrahigh-steel q960e slab and manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101451212B (en) | High intensity steel plate and preparation method thereof | |
| CN101451220A (en) | High-strength abrasion-proof steel plate and method for producing the same | |
| CN101451219A (en) | High intensity wear-resistant steel plate and preparation method thereof | |
| CN101748346B (en) | High-grade wear-resistant steel plate and production method thereof | |
| CN101748333B (en) | Low-carbon-equivalent high-strength wear-resistant steel plate and production method thereof | |
| CN100494451C (en) | Superhigh strength steel plate with yield strength more than 960Mpa and method for producing same | |
| WO2023000584A1 (en) | 1000 mpa-grade quenched and tempered hydroelectric steel plate and production method therefor | |
| CN100467652C (en) | Easy-weld hardening high-strength steel plate and production method thereof | |
| CN103276312B (en) | High-strength steel plate having extra thickness of 80-120mm and method for producing same from continuous casting billet | |
| CN102796967B (en) | 800 MPa economic corrosion-resistance and high-strength steel plate | |
| CN102676945B (en) | Easily-weldable tempered high-strength ductile steel plate used in hydroelectric projects and production method thereof | |
| CN102400043B (en) | Large-thickness steel plate for oceaneering | |
| CN101709432B (en) | Steel for large-thickness hardening and tampering ocean platform and production method thereof | |
| CN102888560B (en) | Large-thickness quenched and tempered high-strength steel plate for ocean engineering and production method thereof | |
| WO2021098208A1 (en) | 690 mpa-grade medium manganese steel medium thick steel with high strength and low yield ratio and manufacturing method therefor | |
| CN105385951A (en) | NM500 abrasion resisting steel plate with high hardness and high tenacity and production method for NM500 abrasion resisting steel plate | |
| CN111378896A (en) | High-strength weather-resistant steel plate for building bridge and manufacturing method thereof | |
| CN102653845A (en) | Steel plate for LPG (Liquefied Petroleum Gas) ship storage tank and production method of steel plate | |
| CN101948987A (en) | High-strength and high-toughness steel plate and manufacturing method thereof | |
| CN105925893A (en) | S355NL low-carbon high-toughness low alloy steel plate of 250 mm thickness and manufacturing method thereof | |
| CN103882330A (en) | Low-yield-ratio ultrahigh-strength non-quenched and tempered steel plate and production method thereof | |
| CN103014545B (en) | High-strength steel plate with 900 Mpa-level yield strength and preparation method of steel plate | |
| CN102181794B (en) | Hardening and tempering high-strength steel plate for wood based panel equipment and production method of tempering high-strength steel plate | |
| CN101451221A (en) | High-strength steel plate and method for producing the same | |
| CN104831185A (en) | Low-cost high-strength steel plate for engineering machinery, 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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090610 |