CN105803334A - Hot-rolled complex phase steel with tensile strength of 700 MPa and production method thereof - Google Patents
Hot-rolled complex phase steel with tensile strength of 700 MPa and production method thereof Download PDFInfo
- Publication number
- CN105803334A CN105803334A CN201610296983.7A CN201610296983A CN105803334A CN 105803334 A CN105803334 A CN 105803334A CN 201610296983 A CN201610296983 A CN 201610296983A CN 105803334 A CN105803334 A CN 105803334A
- Authority
- CN
- China
- Prior art keywords
- cooling
- tensile strength
- cooled
- production method
- section
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses hot-rolled complex phase steel with tensile strength of 700 MPa and a production method thereof. The complex phase steel consists of the following chemical components in percentage by weight: 0.06-0.10% of C, Si not more than 0.3%, 1.00-1.4% of Mn, P not more than 0.025%, S not more than 0.008%, 0.020-0.070% of Als, 0.015-0.035% of Nb, and the balance of Fe and inevitable impurities. The production method of the complex phase steel comprises the steps of: 1) converter smelting; 2) argon blowing, final deoxidation of an aluminum wire and adjustment of the chemical components; 3) blank formation through continuous casting and heating of a casting blank; 4) segmented rolling; and 5) adoption of a five-section control cooling process. A steel plate structure of the complex phase steel produced by the method contains bainite, martensite and a certain quantity of ferrite, so that the better formability can be obtained.
Description
Technical field
The present invention relates to a kind of Multiphase Steel, particularly relate to a kind of tensile strength 700MPa level hot rolling Multiphase Steel and production method thereof.
Background technology
Along with the requirement of energy-saving and emission-reduction and safety improves, the lightweight that high-strength and super-high strength steel realizes automobile is adopted to become the major trend of modern automobile industry development.In high strength steel, Multiphase Steel forms phase with ferrite, bainite and martensite and precipitate, not only has high intensity and enough formabilities, and has good Work Hardening Characteristic and good welding performance.Meanwhile, Multiphase Steel has high energy absorption capability and high residual deformation variable, is particularly suitable for the part such as breaking piece such as side door beams, bumper of requirement excellent impact resistance energy.But due to the restriction of equipment and technique, rarely have the report that relevant steel grade produces both at home and abroad, also only have that the base of a fruit is gloomy in the world, Pu item and Baosteel minority iron and steel enterprise possess supply conditions.
Chinese patent application " a kind of tensile strength 780MPa grade complex phase steel plate and manufacture method ", application number 200510130899.X, disclose a kind of tensile strength 780MPa grade complex phase steel plate and manufacture method, including: chemical composition by mass percent is: 0.13～0.17%C, 0.20～0.40%Si, 1.30～1.50%Mn, 0.02～0.03%Nb, and surplus is Fe；Being organized as granular bainite and martensite heterogeneous structure, wherein: granular bainite body volume fraction is 90～95%, Martensite Volume Fraction is 10～5%；Yield strength is 525～550MPa, and tensile strength is 785～795MPa, and percentage of total elongation of having no progeny is 20～25%.Rolled by cooling controlling and rolling controlling process, control start rolling temperature 1100～1150 DEG C, finishing temperature 800～850 DEG C；Control 40～70 DEG C/s of first paragraph rate of cooling, temperature 550～610 DEG C after cooling；220～360 DEG C/s of second segment rate of cooling, coiling temperature 20～250 DEG C；Batch after cooling, control steel plate thickness 3～4.5mm.This manufacture method obtains in steel plate tissue does not have ferritic structure, is made up of bainite and martensite completely, and forming property is poor.
Summary of the invention
It is an object of the invention to provide the good tensile strength 650MPa level hot rolling Multiphase Steel of a kind of forming property and production method thereof.
For achieving the above object, tensile strength 700MPa level hot rolling Multiphase Steel provided by the present invention, it is made up of the chemical composition of following percentage by weight: C:0.06%～0.10%, Si≤0.3%, Mn:1.00%～1.4%, P≤0.025%, S≤0.008%, Als (acid-soluble aluminum content): 0.020%～0.070%, Nb:0.015%～0.035%, surplus is Fe and inevitable impurity.
Hereinafter the effect of each chemical composition is illustrated.
Carbon: carbon is cheap solution strengthening element.Range of application according to this steel grade, is mainly used in auto parts and components, it is necessary to carry out a degree of Pressing Deformation processing, therefore it is required that material is while meeting requirement of strength, has good cold forming performance.If its content is less than 0.06%, then can not meet the requirement of the strength of materials；If its content is more than 0.10%, then can not meet the favorable forming property of material.So, its content is limited to 0.06～0.10% scope.
Silicon: silicon is cheap and effective deoxygenation of liquid steel element, but too much silicone content can worsen the surface quality of hot rolled steel plate, therefore for silicone content, its content is limited to less than 0.3%.
Manganese: manganese is to improve intensity and the maximally effective element of toughness.If its content is less than 1.00%, then can not meet strength of materials requirement；But add the manganese of volume, the quenching degree increasing steel can be caused, make crack sensitivity increase owing to welding the appearance of hardened layer, and increase the cost of alloy of steel.In consideration of it, it will be defined to 1.4%, so, its content is limited to 1.00～1.4% scopes.
Phosphorus: in order to avoid the welding performance of material, stamping formabilily, toughness, suitability for secondary processing worsen, sets its upper content limit as 0.025%.So its content is controlled below 0.025%.
Sulfur: the cold-bending property of steel is had considerable influence by sulfur content, along with the increase of sulfur content, the cold-bending property of steel reduces.Sulfur in steel often exists with the oxide morphology of manganese, and the impact flexibility of steel is very disadvantageous by this sulphide inculsion, and causes the anisotropy of performance, therefore, need to control more low more good by sulfur content in steel.Based on the consideration to Steel Sheet technique and manufacturing cost, sulfur content in steel is controlled below 0.008%.
Aluminum: aluminum adds for deoxidation, when Als content is less than 0.020%, it is impossible to play its effect；On the other hand, the aluminum owing to adding volume easily forms aluminium oxide agglomerate, so, set the Als upper limit as 0.070%.Therefore, Als content is limited to 0.020～0.070% scope.
Niobium: niobium improves the intensity of steel mainly through crystal grain thinning and precipitation hardening, being strong carbon, nitrogen compound forming element, main in steel exist with Nb (C, N) form, stops growing up of austenite crystal, ferrite grain size is finally made to diminish, thinning microstructure.When its content is lower than 0.015%, it is impossible to meet the requirement of material high intensity；And the niobium added higher than 0.035% time, can meet the requirement of its intensity and processability, if adding, cost of alloy can significantly rise again.So, the performance objective requirement according to steel grade, its content is limited to 0.015～0.035% scope.
Except having made the scope of above chemical composition to limit, from the view point of improve formability of materials, economy, the present invention is not added with the expensive alloying elements such as Cu, Ti, Ni, Cr, Mo.
Preferably, in described chemical composition, the percentage by weight of Mn is 1.17%～1.33%.
Preferably, in described chemical composition, the percentage by weight of Nb is 0.025%～0.035%.
The production method of above-mentioned tensile strength 700MPa level hot rolling Multiphase Steel, comprises the steps:
1) converter smelting is carried out；
2) carry out Argon at Argon station, add aluminum steel final deoxidizing, and carry out the adjustment of other chemical compositions；
3) being casting continuously to form base and strand is heated, slab heating temperature controls at 1250～1300 DEG C, heats time inside furnace 160～200min；
4) carry out segmentation rolling: control roughing end temp at 1080～1120 DEG C, control finish rolling finishing temperature at 800～880 DEG C；
5) five-part form Controlled cooling process is adopted: first paragraph rate of cooling is 80～180 DEG C/s, it is cooled to 650～700 DEG C, second segment rate of cooling is 3～8 DEG C/s, being cooled to 630～680 DEG C, by three-stage cooling speed is 30～100 DEG C/s, is cooled to 410～450 DEG C, 4th section of rate of cooling is 3～8 DEG C/s, being cooled to 380～430 DEG C, the 5th section of rate of cooling is 30～100 DEG C/s, is cooled to 100～250 DEG C；Wherein, first paragraph, the 3rd section, the 5th section employing water-cooled, second segment, the 4th section of employing air cooling.
Hereinafter the control principle of each step is illustrated.
About the control carrying out slab heating temperature and time, it it is one of the critical process of the present invention.Take the alloying element that 1250～1300 DEG C of high-temperature heatings are to ensure that in steel billet to be completely dissolved, control total time to be to ensure that being completely dissolved of alloying element at 160～200min in stove heating.
About carrying out segmentation rolling, control roughing end temp at 1080～1120 DEG C, and to control finish rolling finishing temperature at 800～880 DEG C be also the critical process of the present invention.If this is because roughing end temp is lower than 1080 DEG C, then cannot ensure that finish rolling finishing temperature reaches setting value, increase rolling load, increase energy consumption；As higher than 1120 DEG C, then more iron scale can be produced, affects the surface quality of steel.If finish rolling finishing temperature is lower than 800 DEG C, then can roll in the two-phase region of material, cause the defects such as mixed crystal, and draught pressure is excessive, exceedes capacity of equipment；As higher than 890 DEG C, then the original austenite grains of steel can be excessively thick, reduce the intensity of steel.
About five-part form Controlled cooling process: first paragraph rate of cooling is 80～180 DEG C/s, it is cooled to 650～700 DEG C, in order to ensure to cool down in time when the recrystal grain of steel does not have started and grows up, it is to avoid the generation of thick tissue.Second segment rate of cooling is 3～8 DEG C/s, is cooled to 630～680 DEG C, in order to obtain a certain proportion of ferritic structure.By three-stage cooling speed is 30～100 DEG C/s, is cooled to 410～450 DEG C, and the 4th section of rate of cooling is 3～8 DEG C/s, is cooled to 380～430 DEG C, in order to obtain the bainite structure of vast scale.5th section of rate of cooling is 30～100 DEG C/s, is cooled to 100～250 DEG C, for making matrix have certain martensitic structure, meets the requirement of strength that material is higher.
Preferably, step 2) in, argon blowing time is: bottom blowing >=4min, top blast >=5min.
Preferably, step 3) in, control slab heating temperature at 1260～1285 DEG C, control time inside furnace 170～192min.
Preferably, step 4) in, control roughing end temp at 1095～1108 DEG C.
Preferably, step 4) in, control finish rolling finishing temperature at 843～863 DEG C.
Preferably, step 5) in, first paragraph rate of cooling is 120～140 DEG C/s, and second segment rate of cooling is 4～5 DEG C/s, and by three-stage cooling speed is 60～80 DEG C/s, and the 4th section of rate of cooling is 4～5 DEG C/s, and the 5th section of rate of cooling is 50～65 DEG C/s.
Preferably, step 5) in, first paragraph is cooled to 665～685 DEG C, and second segment is cooled to 641～650 DEG C, and by three-stage cooling is to 425～440 DEG C, and the 4th section is cooled to 390～415 DEG C, and the 5th section is cooled to 130～148 DEG C.
The invention has the beneficial effects as follows: the steel plate tissue of the Multiphase Steel produced, containing bainite, martensite and some ferrites, can obtain better forming property, its lower yield strength 600～750MPa, tensile strength >=700MPa, elongation percentage can reach A80mm>=12%, 180 ° of cross bending test D=1a are qualified, and have good surface quality, can thus manufacture and shape auto parts and components complicated, high intensity requirement.
Accompanying drawing explanation
Fig. 1 is the metallographic structure figure of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1
Present embodiments provide a kind of tensile strength 700MPa level hot rolling Multiphase Steel, be made up of the chemical composition of following percentage by weight: C:0.1%, Si:0.25%, Mn:1.4%, P:0.025%, S:0.006%, Nb:0.035%, Als:0.045%, surplus is Fe and inevitable impurity.
The production method of above-mentioned Multiphase Steel, its step is as follows:
1) converter smelting is carried out；
2) add aluminum steel final deoxidizing at Argon station, and carry out other composition adjustment, argon blowing time: bottom blowing >=4min, top blast >=5min.
3) being casting continuously to form base and strand is heated, slab heating temperature controls 1280 DEG C (temperature is actual has certain fluctuation, lower with), at stove 200min heat time heating time；
4) carry out segmentation rolling: control roughing end temp at 1090 DEG C, control finish rolling finishing temperature at 875 DEG C；
5) five-part form Controlled cooling process is adopted: first paragraph rate of cooling is 120 DEG C/s, it is cooled to 700 DEG C, second segment rate of cooling is 5 DEG C/s, being cooled to 680 DEG C, by three-stage cooling speed is 80 DEG C/s, is cooled to 450 DEG C, 4th section of rate of cooling is 5 DEG C/s, being cooled to 430 DEG C, the 5th section of rate of cooling is 100 DEG C/s, is cooled to 250 DEG C.Wherein, first paragraph, the 3rd section, the 5th section employing water-cooled, second segment, the 4th section of employing air cooling.
6) batch, control coiling temperature at 250 DEG C (coiling temperature and the 5th section of chilling temperature are consistent)；
7) finishing and rear operation are carried out, such as aligning, pickling, cleaning etc..
In the present embodiment, the mechanical properties test result of Multiphase Steel is as shown in table 3, its lower yield strength ReL:651MPa, tensile strength Rm:742MPa, elongation percentage A80mm:22%, yield tensile ratio: 0.87,180 ° of cross bending test: d=1a is qualified.
As it is shown in figure 1, be the metallographic structure figure of Multiphase Steel in the present embodiment, mainly it is made up of bainite, ferrite and a small amount of martensitic structure.
Embodiment 2～8
The tensile strength 700MPa level hot rolling Multiphase Steel that each embodiment provides, is made up of (surplus is Fe and inevitable impurity) the chemical composition of percentage by weight listed in table 1.Its production stage is substantially the same manner as Example 1, is different in that, each step adopts listed technological parameter in table 2.The results are shown in Table 3 for the mechanical properties test of each embodiment gained Multiphase Steel.
The value list of table 1 various embodiments of the present invention
The main technologic parameters list of table 2 various embodiments of the present invention
Table 3 various embodiments of the present invention mechanical properties test the results list
Claims (10)
1. a tensile strength 700MPa level hot rolling Multiphase Steel, it is characterised in that be made up of the chemical composition of following percentage by weight:
Surplus is Fe and inevitable impurity.
2. tensile strength 700MPa level hot rolling Multiphase Steel according to claim 1, it is characterised in that: in described chemical composition, the percentage by weight of Mn is 1.17%～1.33%.
3. tensile strength 700MPa level hot rolling Multiphase Steel according to claim 1, it is characterised in that: in described chemical composition, the percentage by weight of Nb is 0.025%～0.035%.
4. the production method of the tensile strength 700MPa level hot rolling Multiphase Steel according to any one of claims 1 to 3, it is characterised in that comprise the steps:
1) converter smelting is carried out；
2) carry out Argon at Argon station, add aluminum steel final deoxidizing, and carry out the adjustment of other chemical compositions；
3) being casting continuously to form base and strand is heated, slab heating temperature controls at 1250～1300 DEG C, heats time inside furnace 160～200min；
4) carry out segmentation rolling: control roughing end temp at 1080～1120 DEG C, control finish rolling finishing temperature at 800～880 DEG C；
5) five-part form Controlled cooling process is adopted: first paragraph rate of cooling is 80～180 DEG C/s, it is cooled to 650～700 DEG C, second segment rate of cooling is 3～8 DEG C/s, being cooled to 630～680 DEG C, by three-stage cooling speed is 30～100 DEG C/s, is cooled to 410～450 DEG C, 4th section of rate of cooling is 3～8 DEG C/s, being cooled to 380～430 DEG C, the 5th section of rate of cooling is 30～100 DEG C/s, is cooled to 100～250 DEG C；Wherein, first paragraph, the 3rd section, the 5th section employing water-cooled, second segment, the 4th section of employing air cooling.
5. the production method of tensile strength 700MPa level hot rolling Multiphase Steel according to claim 4, it is characterised in that step 2) in, argon blowing time is: bottom blowing >=4min, top blast >=5min.
6. the production method of tensile strength 700MPa level hot rolling Multiphase Steel according to claim 4, it is characterised in that: step 3) in, control slab heating temperature at 1260～1285 DEG C, control time inside furnace 170～192min.
7. the production method of tensile strength 700MPa level hot rolling Multiphase Steel according to claim 4, it is characterised in that: step 4) in, control roughing end temp at 1095～1108 DEG C.
8. the production method of tensile strength 700MPa level hot rolling Multiphase Steel according to claim 4, it is characterised in that: step 4) in, control finish rolling finishing temperature at 843～863 DEG C.
9. the production method of tensile strength 700MPa level hot rolling Multiphase Steel according to claim 4, it is characterized in that: step 5) in, first paragraph rate of cooling is 120～140 DEG C/s, second segment rate of cooling is 4～5 DEG C/s, by three-stage cooling speed is 60～80 DEG C/s, 4th section of rate of cooling is 4～5 DEG C/s, and the 5th section of rate of cooling is 50～65 DEG C/s.
10. the production method of tensile strength 700MPa level hot rolling Multiphase Steel according to claim 4, it is characterized in that: step 5) in, first paragraph is cooled to 665～685 DEG C, second segment is cooled to 641～650 DEG C, by three-stage cooling is to 425～440 DEG C, 4th section is cooled to 390～415 DEG C, and the 5th section is cooled to 130～148 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610296983.7A CN105803334B (en) | 2016-05-06 | 2016-05-06 | Tensile strength 700MPa level hot rolling Multiphase Steels and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610296983.7A CN105803334B (en) | 2016-05-06 | 2016-05-06 | Tensile strength 700MPa level hot rolling Multiphase Steels and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105803334A true CN105803334A (en) | 2016-07-27 |
| CN105803334B CN105803334B (en) | 2017-11-24 |
Family
ID=56455363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610296983.7A Active CN105803334B (en) | 2016-05-06 | 2016-05-06 | Tensile strength 700MPa level hot rolling Multiphase Steels and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105803334B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107267863A (en) * | 2017-06-01 | 2017-10-20 | 舞阳钢铁有限责任公司 | A kind of inexpensive low-carbon-equivalent wind-power tower steel plate and its production method |
| CN108517462A (en) * | 2018-04-11 | 2018-09-11 | 东北大学 | A kind of EH40 grade ship steels of high ductibility and preparation method thereof |
| CN110629003A (en) * | 2019-10-22 | 2019-12-31 | 马鞍山钢铁股份有限公司 | Heat treatment-free hot continuous rolling ultrahigh-strength steel plate and manufacturing method thereof |
| CN110643800A (en) * | 2019-10-22 | 2020-01-03 | 马鞍山钢铁股份有限公司 | 1200 MPa-level hot-rolled high-strength dual-phase steel plate and manufacturing method thereof |
| CN110656292A (en) * | 2018-06-28 | 2020-01-07 | 上海梅山钢铁股份有限公司 | 440 MPa-level tensile strength low-yield-ratio high-hole-expansibility hot-rolled steel plate |
| CN110724876A (en) * | 2019-10-22 | 2020-01-24 | 马鞍山钢铁股份有限公司 | 1100 MPa-level hot-rolled high-strength steel plate and manufacturing method thereof |
| CN113528933A (en) * | 2021-05-31 | 2021-10-22 | 武汉钢铁有限公司 | Hot continuous rolling complex phase high-strength steel and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880825A (en) * | 2010-07-08 | 2010-11-10 | 东北大学 | Ultrafine grained hot rolled dual-phase steel with tensile strength of above 750MPa and manufacturing method of plate thereof |
| CN102676926A (en) * | 2012-05-28 | 2012-09-19 | 宝山钢铁股份有限公司 | Complex phase steel plate and manufacturing method thereof |
| CN102953004A (en) * | 2012-11-19 | 2013-03-06 | 宝山钢铁股份有限公司 | High-strength complex phase steel plate and manufacturing method thereof |
| CN104451402A (en) * | 2014-12-19 | 2015-03-25 | 山东钢铁股份有限公司 | 700MPa-grade hot-rolled dual-phase steel and manufacturing method thereof |
-
2016
- 2016-05-06 CN CN201610296983.7A patent/CN105803334B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880825A (en) * | 2010-07-08 | 2010-11-10 | 东北大学 | Ultrafine grained hot rolled dual-phase steel with tensile strength of above 750MPa and manufacturing method of plate thereof |
| CN102676926A (en) * | 2012-05-28 | 2012-09-19 | 宝山钢铁股份有限公司 | Complex phase steel plate and manufacturing method thereof |
| CN102953004A (en) * | 2012-11-19 | 2013-03-06 | 宝山钢铁股份有限公司 | High-strength complex phase steel plate and manufacturing method thereof |
| CN104451402A (en) * | 2014-12-19 | 2015-03-25 | 山东钢铁股份有限公司 | 700MPa-grade hot-rolled dual-phase steel and manufacturing method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107267863A (en) * | 2017-06-01 | 2017-10-20 | 舞阳钢铁有限责任公司 | A kind of inexpensive low-carbon-equivalent wind-power tower steel plate and its production method |
| CN108517462A (en) * | 2018-04-11 | 2018-09-11 | 东北大学 | A kind of EH40 grade ship steels of high ductibility and preparation method thereof |
| CN110656292A (en) * | 2018-06-28 | 2020-01-07 | 上海梅山钢铁股份有限公司 | 440 MPa-level tensile strength low-yield-ratio high-hole-expansibility hot-rolled steel plate |
| CN110629003A (en) * | 2019-10-22 | 2019-12-31 | 马鞍山钢铁股份有限公司 | Heat treatment-free hot continuous rolling ultrahigh-strength steel plate and manufacturing method thereof |
| CN110643800A (en) * | 2019-10-22 | 2020-01-03 | 马鞍山钢铁股份有限公司 | 1200 MPa-level hot-rolled high-strength dual-phase steel plate and manufacturing method thereof |
| CN110724876A (en) * | 2019-10-22 | 2020-01-24 | 马鞍山钢铁股份有限公司 | 1100 MPa-level hot-rolled high-strength steel plate and manufacturing method thereof |
| CN113528933A (en) * | 2021-05-31 | 2021-10-22 | 武汉钢铁有限公司 | Hot continuous rolling complex phase high-strength steel and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105803334B (en) | 2017-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106011643B (en) | A kind of tensile strength 590MPa grades of cold-rolled biphase steels and preparation method thereof | |
| CN105803334B (en) | Tensile strength 700MPa level hot rolling Multiphase Steels and its production method | |
| CN105950984B (en) | Tensile strength 650MPa level hot rolling Multiphase Steels and its production method | |
| CN101736199B (en) | Hot-rolled strip steel for high-strength cold-formed welded structure and manufacturing method thereof | |
| CN104498821B (en) | Medium-manganese high-strength steel for automobiles and production method thereof | |
| CN104032215B (en) | 420MPa level steel for automobile wheel and production method thereof | |
| CN105925905B (en) | 780MPa grades of hot-rolled dual-phase steels of Nb-Ti systems and its production method | |
| CN103320701B (en) | A kind of ferrite-bainite AHSS plate and manufacture method thereof | |
| CN105088068B (en) | A kind of 500MPa grades of automotive frame coated steel and its ultrafast cold production method | |
| CN103882330A (en) | Low-yield-ratio ultrahigh-strength non-quenched and tempered steel plate and production method thereof | |
| CN112430787B (en) | Low-yield-ratio high-strength cold-rolled hot-dip galvanized steel plate and manufacturing method thereof | |
| CN109055651A (en) | A method of 600MPa grades of carriage body steel of hot rolling thin gauge are produced completely without head bar strip continuous casting and rolling flow path based on ESP | |
| CN107747039A (en) | A kind of high reaming performance cold-rolled biphase steel and preparation method thereof | |
| CN102400053A (en) | Steel plate with yield strength of 460MPa for building structure and manufacturing method thereof | |
| CN104328350A (en) | Quenched and tempered steel with yield strength of 960MPa and manufacturing method thereof | |
| CN110747405B (en) | One-thousand-megapascal-grade cold-rolled bainite steel plate suitable for rolling and preparation method thereof | |
| CN111270169A (en) | Ni-containing alloy steel plate with excellent low-temperature toughness and production method thereof | |
| CN105779874B (en) | Cr Nb system 780MPa levels hot-rolled dual-phase steels and its production method | |
| CN113073260A (en) | Steel for high-plasticity cold-roll forming with tensile strength of 500MPa and production method thereof | |
| CN107513669A (en) | A kind of high-strength cold rolling square and rectangular pipe steel and its manufacture method | |
| CN105821315B (en) | Tensile strength 750MPa level hot rolling Multiphase Steels and its production method | |
| CN110331344A (en) | A kind of Rm >=600MPa beam steel that strength character is stable and production method | |
| CN105112810A (en) | Steel for high heat input resisting welding and preparation method thereof | |
| CN104195438A (en) | Steel with 520MPa-grade tensile strength for agitator tank and production method of steel | |
| CN106834937A (en) | A kind of 530MPa grades of Thin Specs galvanized steel and its production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170627 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Applicant after: Wuhan iron and Steel Company Limited Address before: 430083 Qingshan District, Hubei, Wuhan Applicant before: WUHAN IRON AND STEEL CORPORATION |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |