CN110449465A - A method of reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band - Google Patents
A method of reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band Download PDFInfo
- Publication number
- CN110449465A CN110449465A CN201910599996.5A CN201910599996A CN110449465A CN 110449465 A CN110449465 A CN 110449465A CN 201910599996 A CN201910599996 A CN 201910599996A CN 110449465 A CN110449465 A CN 110449465A
- Authority
- CN
- China
- Prior art keywords
- cold rolling
- rolling
- band
- brisement
- strength steel
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
-
- 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
- B21B37/76—Cooling control on the run-out table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention relates to a kind of methods for reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band, including high-strength steel smelting, heating stove heating, roughing, de-scaling, 2250mm hot continuous rolling, section cooling and coiling process, the section cooling simultaneously closes off accurate adjustment area side spray water in such a way that back segment 1/2 is cooling.Brisement band defect in high-hardenability high-strength steel cold rolling side can be effectively solved in the case where not affecting the normal production with properties of product using the present invention, improve strip lumber recovery and instant yield.
Description
Technical field
The present invention relates to a kind of methods more particularly to a kind of reduction high-hardenability cold rolling for controlling cold rolling band steel side brisement band
The method of high-strength steel cold rolling side brisement band.
Background technique
With going deep into for automotive light weight technology, the specific gravity that high-strength steel accounts for automobile steel constantly rises.High-strength steel is in order to obtain height
Intensity generally uses high alloy system or high-carbon system, and these component systems make steel plate harden ability with higher.Generally
With the promotion of intensity, alloy content is also higher, while harden ability also increases, and high-hardenability high-strength steel cooling velocity mistake
Martensitic traoformation easily occurs fastly, especially after hot rolling in laminar flow and coiling process edge cooling rate comparatively fast easily generate friable tissues or
Stress cracking phenomenon occurs, serious person's hot rolling raw material even occurs rotten side phenomenon, causes steel edge portion plasticity relatively low, cold-rolling deformation
Brisement band in process side is high.The Chinese patent of Patent No. 201810882943.X discloses that " one kind prevents hot continuous rolling steel
The method of plate brisement band in side in cold rolling ", " China's metallurgy " the 9th phase in 2018, which has delivered, " to be split cause and breaks in 980 MPa grades of dual phase steel side
The band analysis of causes ", which splits proposition for DP980 cold rolling side and is put into burial pit and closing finish rolling side spray measure,
But strip Surface Realize iron scale is blocked up during its implementation, causes pickling difficult, further increases rolling difficulty, causes
It is higher to roll the rate of splitting, does not suggest that corresponding solution simultaneously for high-hardenability high-strength steel side brisement band problem.
Summary of the invention
It is an object of the present invention to provide a kind of methods for reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band, mitigate even
It eliminates cold-rolled process high-hardenability high-strength steel side and splits broken belt rate, improve production stability, solve background technique defect.
A method of reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band, including 2250mm hot continuous rolling and its laminar flow
Cooling process, the section cooling simultaneously close off accurate adjustment area side spray water in such a way that back segment 1/2 is cooling.
The method of above-mentioned reduction high-hardenability cold rolling high-strength steel cold rolling side brisement band, including high-strength steel smelting, heating furnace
Heating, roughing, de-scaling, 2250mm hot continuous rolling, section cooling and coiling process, the coiling technique use the U-shaped volume of head and tail temperature
Taking technique, head and tail temperature compensate 30 DEG C, and compensating length 50m, oiler temperature control avoids bainite transformation at 610 DEG C or more
Area stops.
The method of above-mentioned reduction high-hardenability cold rolling high-strength steel cold rolling side brisement band batches rear offline hot rolling using handstand
Stacking mode is placed, and the axially vertical ground of hot rolling, other steel that stacking bottom and the top hot rolling are produced with same batch are made
Kind coil of strip replaces, and reduces edge temperature drop rate, avoids the edge temperature difference.
The method of above-mentioned reduction high-hardenability cold rolling high-strength steel cold rolling side brisement band, carries out after coils of hot-rolled steel stacking is cooling
Cold continuous rolling, cold rolling reduction ratio control between 45%-50%；Enter cold continuous rolling process after cold rolling, during cold rolling by the 4th with
The control of 5th rack additional tension is controlled in 10KN-30KN, interstand tension in 250KN-320KN；Rear process trimming is taken,
Not trimming before rolling is reduced and is extended in the generation and the operation of rolling of edge micro-crack.
With the prior art, the beneficial effects of the present invention are:
The present invention is cooling using back segment 1/2 by adjusting laminar flow refrigerating mode and batching the critical control point such as mode, can promote
Matrix ferrite and perlitic transformation close accurate adjustment area side spray water and control coiling temperature at 610 DEG C or more, avoid batching
Edge temperature drop is too fast in journey and its generation of edge friable tissues；Change traditional hot rolling way of stacking, hot rolling axis is disposed vertically, benefit
It is kept the temperature in edge and to slow down edge temperature drop too fast, while temperature conduction facilitates edging tissue and is sufficiently tempered between stacking volume,
Reduce the generation of edge friable tissues；Cold rolling reduction ratio is reduced, takes and rolls preceding not trimming, control cold rolling interstand tension, thus
Avoid reduction ratio excessive and side brisement band accident caused by edge micro-crack extension.
This method is simple and easy, and does not influence raw steel kind production technology, high financial profit；It can be in not shadow using the present invention
Brisement band defect in high-hardenability high-strength steel cold rolling side is effectively solved in the case where ringing normal production and properties of product, improve strip at
Material rate and instant yield.
This method is simple and easy.Especially for harden ability height, such as martensite cold-rolled steel and quenching partition steel, such as
MS1500, QP1180 and other effects are more apparent.
Detailed description of the invention
Fig. 1 is offline hot rolling stacking schematic diagram；
Fig. 2 is cold rolling side brisement band schematic diagram of the QP1180 steel band under existing production technology；
Fig. 3 is metallographic structure figure of the QP1180 steel band away from edge 2mm under existing production technology；
Fig. 4 is metallographic structure figure of the QP1180 steel band away from edge 2mm that embodiment 1 produces；
Fig. 5 is the intensity contrast that QP1180 hot rolled strip uses front and rear width direction of the present invention different location in embodiment 1；
Fig. 6 is that QP1180 hot rolled strip is compared using front and rear width direction different location elongation percentage of the present invention in embodiment 1；
Fig. 7 is the QP1180 cold rolling band steel quality of edges schematic diagram that embodiment 1 produces；
Fig. 8 is cold rolling side brisement band schematic diagram of the MS1500 steel band under existing production technology；
Fig. 9 is metallographic structure figure of the MS1500 steel band away from edge 2mm under existing production technology；
Figure 10 is metallographic structure figure of the MS1500 steel band away from edge 2mm that embodiment 2 produces；
Figure 11 is that MS1500 hot rolled strip uses present invention front and back hot rolled strip width direction different location intensity pair in embodiment 2
Than；
Figure 12 is that MS1500 hot rolled strip is compared using present invention front and back different location elongation percentage in embodiment 2；
Figure 13 is the MS1500 cold rolling band steel quality diagram that embodiment 2 produces.
Specific embodiment
Below by way of specific embodiment, the present invention will be further described:
Embodiment 1
QP1180 steel band is produced, smelts and enters 2250mm hot continuous rolling process after the completion, heated stove heating+roughing+de-scaling+
Enter section cooling section after 2250mm tandem mill tandem rolling, section cooling section includes 2 sections of front and back, every section of 10 groups of water spray beam groups altogether；Heat
It rolls section cooling section and selects 1/2 type of cooling of back segment, back segment opens 11-20 group water-spraying control, and every group of 4 spray beams, 1/2 is cold
But mode selects 2 spray beams in every group to carry out water-spraying control；Accurate adjustment area side spray water is simultaneously closed off, edge temperature drop is improved；Laminar flow
Enter coiling process after cooling, coiling technique uses U-shaped coiling technique, compensates 30 DEG C, compensating length 50m end to end, coiling temperature
Control is at 630 DEG C ± 15 DEG C；
Offline hot rolling is placed using handstand stacking mode after the completion of batching, as shown in Figure 1, the axially vertical ground stacking of hot rolling, heap
The DP780 coil of strip that pile bottom and the top hot rolling are produced with same batch replaces, and edging tissue is as shown in Fig. 4 after cooling；
Coil of strip after cooling enters cold continuous rolling process, and cold rolling reduction ratio is 45%, and not trimming before rolling generates fine fisssure to avoid trimming
The extension of line during the rolling process；Additional tension is set as 10KN, interstand tension control between the 4th and the 5th rack in cold-rolled process
It is made as 250KN-280KN, offline cold rolling flanging part pattern is as shown in Figure 7；
Fig. 4 is metallographic structure figure of the QP1180 steel band away from edge 2mm that embodiment 1 produces；Fig. 3 is QP1180 steel band in existing life
Metallographic structure figure away from edge 2mm under production. art；It can be seen that by comparing Fig. 4 and Fig. 3 using present invention process production
Metallographic structure of the QP1180 steel band away from edge 2mm is ferrite and pearlite, and acicular ferrite obviously subtracts with the island disperse Ma Ao
It is few；Implementing the comparison of front and rear width direction different location mechanical property by Fig. 5 and Fig. 6 simultaneously can find that the present invention produces QP1180
QP1180 of the edge plasticity compared with prior art production is obviously improved.
Fig. 7 is the QP1180 quality of edges pictorial diagram that embodiment 1 produces, and Fig. 2 is the QP1180 produced using prior art
Cold rolling side brisement band schematic diagram, can be seen that the QP1180 produced using present invention process by comparing Fig. 7 and Fig. 2, complete
It totally disappeared in addition to cold rolling side is split.
Embodiment 2
MS1500 steel band is produced, smelts and enters 2250mm hot continuous rolling process after the completion, heated stove heating+roughing+de-scaling+
Enter section cooling section after 2250mm tandem mill tandem rolling, section cooling section includes 2 sections of front and back, every section of 10 groups of water spray beam groups altogether；Heat
It rolls section cooling section and selects 1/2 type of cooling of back segment, back segment opens 11-20 group water-spraying control, and every group of 4 spray beams, 1/2 is cold
But mode selects 2 spray beams in every group to carry out water-spraying control；Accurate adjustment area side spray water is simultaneously closed off, edge temperature drop is improved；Laminar flow
Enter coiling process after cooling, coiling process compensates 30 DEG C, compensating length 50m using U-shaped coiling technique end to end, coiling temperature control
System is at 635 DEG C ± 15 DEG C；
Offline hot rolling is placed using handstand stacking mode after the completion of batching, as shown in Figure 1, the axially vertical ground stacking of hot rolling, heap
Pile bottom and the top hot rolling are replaced with other steel grade DP600 coil of strips that same batch produces, and edging tissue is as schemed after cooling
Shown in 10；
Coil of strip after cooling enters cold continuous rolling process, and cold rolling reduction ratio is 50%, and not trimming before rolling generates fine fisssure to avoid trimming
The extension of line during the rolling process；Additional tension is set as 30KN, interstand tension control between the 4th and the 5th rack in cold-rolled process
It is made as 280KN-320KN, offline cold rolling flanging part pattern is as shown in figure 13；
Figure 10 is metallographic structure figure of the MS1500 steel band away from edge 2mm that embodiment 2 produces；Fig. 9 is MS1500 steel band existing
Metallographic structure figure away from edge 2mm under production technology；It can be seen that by comparing Fig. 9 and Figure 10 and produced using present invention process
Metallographic structure of the MS1500 steel band away from edge 2mm be ferrite and pearlite and a small amount of bainite, needle-shaped horse shellfish friable tissues
It is obvious to disappear；The comparison discovery of front and rear width direction different location mechanical property, present invention production are implemented to Figure 11 and Figure 12 simultaneously
MS1500 edge plasticity compared with prior art production MS1500 edge plasticity be obviously improved；
Figure 13 is the MS1500 quality of edges pictorial diagram that embodiment 2 produces, and Fig. 8 is the MS1500 cold rolling produced using prior art
Side brisement band schematic diagram, can be seen that the MS1500 produced using present invention process by comparing Figure 13 and Fig. 8, completely
Cold rolling side is eliminated to split.
It is detected above-described embodiment steel grade and is not occurred side and split phenomenon.
Claims (4)
1. a kind of method for reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band, including 2250mm hot continuous rolling and section cooling
Process, it is characterised in that: the section cooling simultaneously closes off accurate adjustment area side spray water in such a way that back segment 1/2 is cooling.
2. the method for reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band as described in claim 1, including high-strength steel smelting
Refining, heating stove heating, roughing, de-scaling, 2250mm hot continuous rolling, section cooling and coiling process, it is characterised in that: the fourth hand
Skill use the U-shaped coiling technique of head and tail temperature, head and tail temperature compensate 30 DEG C, compensating length 50m, oiler temperature control at 610 DEG C and
More than, avoid bainite transformation area from stopping.
3. reducing the method for high-hardenability cold rolling high-strength steel cold rolling side brisement band as claimed in claim 2, it is characterised in that: volume
It takes rear offline hot rolling to place using handstand stacking mode, makes the axially vertical ground of hot rolling, stacking bottom and the top hot rolling are equal
It is replaced with other steel grade coil of strips that same batch produces, reduces edge temperature drop rate, avoid the edge temperature difference.
4. reducing the method for high-hardenability cold rolling high-strength steel cold rolling side brisement band as claimed in claim 3, it is characterised in that: heat
Cold continuous rolling is carried out after rolled steel coils stacking is cooling, cold rolling reduction ratio controls between 45%-50%；Enter cold continuous rolling process after cold rolling,
By the control of the 4th and the 5th rack additional tension in 10KN-30KN during cold rolling, interstand tension is controlled in 250KN-
320KN；Rear process trimming is taken, reduces and is extended in the generation and the operation of rolling of edge micro-crack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599996.5A CN110449465B (en) | 2019-07-04 | 2019-07-04 | Method for reducing cold-rolled edge fracture zone of high-hardenability cold-rolled high-strength steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599996.5A CN110449465B (en) | 2019-07-04 | 2019-07-04 | Method for reducing cold-rolled edge fracture zone of high-hardenability cold-rolled high-strength steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110449465A true CN110449465A (en) | 2019-11-15 |
| CN110449465B CN110449465B (en) | 2021-03-09 |
Family
ID=68482150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910599996.5A Active CN110449465B (en) | 2019-07-04 | 2019-07-04 | Method for reducing cold-rolled edge fracture zone of high-hardenability cold-rolled high-strength steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110449465B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605156A (en) * | 2021-01-15 | 2021-04-06 | 安阳钢铁股份有限公司 | Method for improving flatness of hot continuous rolling thin-specification checkered plate |
| CN113059003A (en) * | 2021-03-01 | 2021-07-02 | 首钢京唐钢铁联合有限责任公司 | Method for controlling acid edge crack of cold-rolled high-strength steel |
| CN113245366A (en) * | 2021-04-16 | 2021-08-13 | 首钢集团有限公司 | Method for reducing non-welding-seam strip breakage rate in 590Mpa high-strength steel cold rolling |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483528A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Three section laminar flow cooling technology for hot rolling band steel |
| CN101941024A (en) * | 2010-07-22 | 2011-01-12 | 河北省首钢迁安钢铁有限责任公司 | Method for eliminating peeling of IF steel edge in hot continuous rolling process |
| CN102101124A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Production method for eliminating edge defects of hot-rolled strip steel |
| CN102179407A (en) * | 2011-03-17 | 2011-09-14 | 宁波钢铁有限公司 | Method for preparing hot rolling strip steel capable of preventing edge crack of extremely thin rolled strip steel |
| CN103290311A (en) * | 2013-05-30 | 2013-09-11 | 宁波钢铁有限公司 | Method for manufacturing civil high-grade anti-theft door plank |
| CN104141093A (en) * | 2013-05-10 | 2014-11-12 | 河北钢铁股份有限公司承德分公司 | Automobile compartment body band steel with yield strength reaching 700MPa, and rolling method thereof |
| CN105734235A (en) * | 2014-12-10 | 2016-07-06 | 上海梅山钢铁股份有限公司 | Intensive cooling control method for hot continuous rolling strip steel |
| DE102016114404A1 (en) * | 2015-09-08 | 2017-03-09 | Hitachi, Ltd. | Reel temperature control device and reel temperature control method |
| CN107983771A (en) * | 2017-11-23 | 2018-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | The high-strength chill volume hot-rolling method of building concrete fixing piece |
| CN109465295A (en) * | 2018-08-06 | 2019-03-15 | 首钢集团有限公司 | Method for preventing edge cracking and strip breakage of hot continuous rolled steel plate in cold rolling |
-
2019
- 2019-07-04 CN CN201910599996.5A patent/CN110449465B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483528A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Three section laminar flow cooling technology for hot rolling band steel |
| CN102101124A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Production method for eliminating edge defects of hot-rolled strip steel |
| CN101941024A (en) * | 2010-07-22 | 2011-01-12 | 河北省首钢迁安钢铁有限责任公司 | Method for eliminating peeling of IF steel edge in hot continuous rolling process |
| CN102179407A (en) * | 2011-03-17 | 2011-09-14 | 宁波钢铁有限公司 | Method for preparing hot rolling strip steel capable of preventing edge crack of extremely thin rolled strip steel |
| CN104141093A (en) * | 2013-05-10 | 2014-11-12 | 河北钢铁股份有限公司承德分公司 | Automobile compartment body band steel with yield strength reaching 700MPa, and rolling method thereof |
| CN103290311A (en) * | 2013-05-30 | 2013-09-11 | 宁波钢铁有限公司 | Method for manufacturing civil high-grade anti-theft door plank |
| CN105734235A (en) * | 2014-12-10 | 2016-07-06 | 上海梅山钢铁股份有限公司 | Intensive cooling control method for hot continuous rolling strip steel |
| DE102016114404A1 (en) * | 2015-09-08 | 2017-03-09 | Hitachi, Ltd. | Reel temperature control device and reel temperature control method |
| CN107983771A (en) * | 2017-11-23 | 2018-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | The high-strength chill volume hot-rolling method of building concrete fixing piece |
| CN109465295A (en) * | 2018-08-06 | 2019-03-15 | 首钢集团有限公司 | Method for preventing edge cracking and strip breakage of hot continuous rolled steel plate in cold rolling |
Non-Patent Citations (2)
| Title |
|---|
| 张亮亮: "影响高强双相钢冷轧边部缺陷", 《金属材料与冶金工程》 * |
| 高菊: "连铸连轧产品缺陷分析及控制措施", 《钢铁钒钛》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605156A (en) * | 2021-01-15 | 2021-04-06 | 安阳钢铁股份有限公司 | Method for improving flatness of hot continuous rolling thin-specification checkered plate |
| CN112605156B (en) * | 2021-01-15 | 2023-03-10 | 安阳钢铁股份有限公司 | Method for improving flatness of hot continuous rolling thin-specification checkered plate |
| CN113059003A (en) * | 2021-03-01 | 2021-07-02 | 首钢京唐钢铁联合有限责任公司 | Method for controlling acid edge crack of cold-rolled high-strength steel |
| CN113245366A (en) * | 2021-04-16 | 2021-08-13 | 首钢集团有限公司 | Method for reducing non-welding-seam strip breakage rate in 590Mpa high-strength steel cold rolling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110449465B (en) | 2021-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104532126B (en) | A kind of super high strength hot rolled Q＆P steel of low yield strength ratio and its manufacture method | |
| CN107043888B (en) | A kind of 980MPa that cold-bending property is excellent grade dual-phase steel plate and preparation method thereof | |
| CN110184525B (en) | High-strength Q500GJE quenched and tempered steel plate for building structure and manufacturing method thereof | |
| CN103038381B (en) | Steel plate and manufacture method thereof | |
| CN107287489B (en) | Based on the method completely without head bar strip continuous casting and rolling flow path production titanium micro-alloyed steel | |
| CN107574370B (en) | Wear-resistant steel with thickness of 2-10 mmNM400 and production method thereof | |
| CN102174685B (en) | 800 MPa grade cold-rolling dual-phase steel and manufacturing method thereof | |
| CN110306102B (en) | Hot-rolled and pickled complex-phase steel with excellent surface quality and preparation method thereof | |
| CN103114257B (en) | Acid-washing-free high-strength crossbeam steel with stable oxide layer and preparation method of steel | |
| CN110449465A (en) | A method of reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band | |
| CN107475627B (en) | 600MPa grade analysis of producing hot rolled TRIP and manufacturing method based on CSP process | |
| CN105177422B (en) | Ultra-long thin EH36 steel and production method of ultra-long thin EH36 steel on steckle mill | |
| CN107557692B (en) | 1000MPa grade analysis of producing hot rolled TRIP and manufacturing method based on CSP process | |
| CN111440987B (en) | Quenching distribution steel with tensile strength of more than or equal to 980MPa produced by adopting short process and method | |
| CN103249847A (en) | Method for manufacturing high-strength cold-rolled/hot-rolled trip steel having a tensile strength of 590 mpa grade, superior workability, and low mechanical-property deviation | |
| CN100560773C (en) | A kind of high-strength anti-fatigue steel products and manufacture method thereof | |
| CN108411203A (en) | NM300 wear-resistant steel for high-silicon high-aluminum concrete mixer truck and production method thereof | |
| CN107723602A (en) | 750MPa levels hot-rolled ferrite-bainite dual-phase steel and its production method | |
| CN101139685A (en) | High-strength antifatigue steel products and method for manufacturing same | |
| CN111455282A (en) | Quenching distribution steel with tensile strength more than or equal to 1500MPa produced by adopting short process and method | |
| CN105734403A (en) | Hot-rolled coil for saw blade steel and production method of hot-rolled coil | |
| CN107699797A (en) | 390MPa levels continuous annealing cold rolled automobile structural steel and iron and its production method | |
| CN107488814B (en) | 800MPa grade analysis of producing hot rolled TRIP and manufacturing method based on CSP process | |
| CN103212588B (en) | Method of reducing defect that slag is clamped under surface when carbon manganese steel is rolled in a hot mode | |
| CN108677087B (en) | Low-alloy high-strength cold-rolled annealed steel plate and preparation method of alloy-coated steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |