CN104043655A - Hydraulic screw down system for temper mill with independent single rack and control method - Google Patents
Hydraulic screw down system for temper mill with independent single rack and control method Download PDFInfo
- Publication number
- CN104043655A CN104043655A CN201410253224.3A CN201410253224A CN104043655A CN 104043655 A CN104043655 A CN 104043655A CN 201410253224 A CN201410253224 A CN 201410253224A CN 104043655 A CN104043655 A CN 104043655A
- Authority
- CN
- China
- Prior art keywords
- servo valve
- back pressure
- valve
- down system
- press down
- 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
- 238000000034 method Methods 0.000 title claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000005096 rolling process Methods 0.000 claims abstract description 25
- 230000000881 depressing effect Effects 0.000 claims description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 7
- 238000000137 annealing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a hydraulic screw down system for a temper mill with an independent single rack and belongs to the technical field of cold-rolled sheet leveling. The hydraulic screw down system for the temper mill with the independent single rack comprises a first servo valve, a second servo valve and a back pressure supply device, wherein the first servo valve is connected with a screw down cylinder; the other end of the first servo valve is connected with a pump; one end of the second servo valve is connected with the screw down cylinder; the other end of the second servo valve is connected with the pump; the back pressure supply device S is connected with the screw down cylinder. According to the hydraulic screw down system for the temper mill with the independent single rack, the problem that the mild steel small-roll force stable temper rolling and the super-strength steel stable temper rolling cannot coexist is solved.
Description
Technical field
The present invention relates to the smooth technical field of cold rolled sheet, particularly hydraulic press down system and control method for a kind of separate single frame planisher.
Background technology
Flat cold-rolled sheet cover moves back product in cold rolled sheet is produced, after pickling processes, heavy reduction rate rolling, generally will cover move back workshop carry out surperficial cleaning by degreasing processing, then enter bell-type annealing furnace annealing, on single chassis planisher carry out smooth, last oiling, become final finished after cutting.Smooth is the last process control technology of key together before cold rolling finished product.Smooth Main Function is: apply the little deflection of depressing of a uniform 0.4%-2.8% to cold-strip steel, to eliminate the yield point elongation of annealed strip, prevent from being with steel to add and produce skid wire man-hour; Reduce yield point, to expand plastic deformation scope; Improve strip profile and flatness, to obtain good template.
Modern cold rolling levelling is various in style, and related products have the IF steel of low surrender, and yield strength can be in 100MPa left and right, have the aluminum killed steel of medium yield strength, also have intensity to reach 1000MPa superhigh intensity steel; Material thickness variation scope is 0.1mm-3.0mm; Wide variety is at 800mm-1800mm.This has also caused the fluctuation range of the stable rolling power that need to provide in the time of skin pass rolling poor considerably beyond the limit of power of hydraulic press down system of early stage design.In traditional design, what conventionally consider is the realization of the maximum rolling power (generally for 650MPa material) of the smooth press down system of material, selects the MOOG servo valve control of single D661 series.The problem causing is thus the little roll-force of IF mild steel when smooth, and roll-force fluctuation seriously causes the fluctuation of belt steel flating percentage elongation serious, and performance, template degenerate; In the time of rolling high-strength steel, there will be again roll-force not increase, the situation that percentage elongation is less than normal; Be less than all helpless more than 700MPa of minimum roll-force or intensity in actual roll-force.Should improve the traffic ability of servo valve, the response accuracy, sensitivity, the dynamic characteristic that improve again servo valve are very difficult.Find a kind of low cost, expand that cover moves back production product type, hydraulic press down system and the control method of smooth precision while improving limit roll-force are to need the problem of solution badly but can meet.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of separate single frame planisher hydraulic press down system and control method that has solved the little roll-force of mild steel and stablize skin pass rolling and super-high strength steel and stablize the incompatible problem of skin pass rolling.
For solving the problems of the technologies described above, the invention provides a kind of separate single frame planisher hydraulic press down system, for the pressure of pump is offered and depresses cylinder, for skin pass rolling flat cold-rolled sheet; Described hydraulic press down system comprises: the first servo valve, the second servo valve and back pressure feedway; Described the first servo valve is electrohydraulic servo valve; Described the second servo valve is electrohydraulic servo valve; The flow of described the first servo valve is greater than described the second servo valve; Described first servo valve one end with described in depress cylinder and be connected, the other end is connected with described pump; Described second servo valve one end with described in depress cylinder and be connected, the other end is connected with described pump; Described back pressure feedway with described in depress cylinder and be connected.
Further, described separate single frame planisher also comprises the first hydraulic control one-way valve and the second hydraulic control one-way valve with hydraulic press down system; Described the first servo valve by described the first hydraulic control one-way valve with described in depress cylinder and be connected; Described the second servo valve by described the second hydraulic control one-way valve with described in depress cylinder and be connected.
Further, described separate single frame planisher also comprises the first solenoid directional control valve and the second solenoid directional control valve with hydraulic press down system; Described the first solenoid directional control valve is connected with described the first servo valve, for controlling the switching of described the first servo valve; Described the second solenoid directional control valve is connected with described the second servo valve, for controlling the switching of described the second servo valve.
Further, the device of depressing cylinder rod chamber that described back pressure feedway is proportional pressure-relief valve control; The back pressure value capable of dynamic modulation that described back pressure feedway provides.
Further, a kind of control method of hydraulic press down system, for surrendering the steel that is greater than 150Mpa, comprises the following steps: step 1, close the second servo valve; Step 2, opens the first servo valve; Step 3, opens back pressure feedway.
Further, the surrender of described steel is between 150Mpa-500Mpa, and described back pressure feedway S adopts default value 6Mpa.
Further, the surrender of described steel is greater than 500Mp, and described back pressure feedway S adopts 3Mpa.
Further, a kind of control method of hydraulic press down system, for surrendering the steel at 100Mpa-150Mpa, comprises the following steps: step 1, close the first servo valve; Step 2, opens the second servo valve; Step 3, opens back pressure feedway.
Further, the thickness of described steel is between 0.3-2.5mm, and described back pressure feedway S adopts 6Mpa.
Further, the thickness of described steel is less than or equal to 0.5mm, and described back pressure feedway S adopts 12Mpa.
Separate single frame planisher provided by the invention is greater than the second servo valve with the flow of the first servo valve of hydraulic press down system, first servo valve one end with depress cylinder and be connected, the other end is connected with pump, second servo valve one end with depress cylinder and be connected, the other end is connected with described pump, open the first servo valve or the second servo valve according to different flat cold-rolled sheets, fluid in pump is transported to and depresses cylinder, back pressure feedway with depress cylinder and be connected, provide pressure for depressing cylinder, solve that the little roll-force of mild steel is stablized skin pass rolling and super-high strength steel is stablized the incompatible problem of skin pass rolling.
Brief description of the drawings
The separate single frame planisher that Fig. 1 provides for the embodiment of the present invention structural representation of hydraulic press down system.
Detailed description of the invention
Referring to Fig. 1, a kind of separate single frame planisher hydraulic press down system that the embodiment of the present invention provides, comprises the first servo valve A, the second servo valve B and back pressure feedway S.The first servo valve A is electrohydraulic servo valve.First servo valve A valve flow >=50L/min, resolution ratio≤0.2%, stagnant ring≤0.1%.First servo valve A one end with depress cylinder and be connected, the other end is connected with pump, for the pressure of pump is offered and depresses cylinder, for skin pass rolling flat cold-rolled sheet.The second servo valve B is electrohydraulic servo valve.The second servo valve B valve is flow≤20L/min, resolution ratio≤0.1%, frequency range >=80HZ.Second servo valve B one end with depress cylinder and be connected, the other end is connected with pump, for the pressure of pump is offered and depresses cylinder, for skin pass rolling flat cold-rolled sheet.The flow of the first servo valve A is greater than described the second servo valve B.The first servo valve A and the second servo valve B can switch the independent action of controlling hydraulic cylinder online.Separate single frame planisher of the present invention also comprises the first hydraulic control one-way valve Fa and the second hydraulic control one-way valve Fb with hydraulic press down system.The first servo valve A by the first hydraulic control one-way valve Fa with depress cylinder and be connected.The second servo valve B by the second hydraulic control one-way valve Fb with depress cylinder and be connected.Separate single frame planisher of the present invention also comprises the first solenoid directional control valve Xa and the second solenoid directional control valve Xb with hydraulic press down system.The first solenoid directional control valve Xa is connected with the first servo valve A, for controlling the switching of the first servo valve A.The second solenoid directional control valve Xb is connected with the second servo valve B, for controlling the switching of the second servo valve B.Back pressure feedway S with depress cylinder and be connected.The device of depressing cylinder rod chamber that back pressure feedway S is proportional pressure-relief valve control.The back pressure value capable of dynamic modulation that back pressure feed system provides.The scope that the back pressure of back pressure feedway S provides is 3MPa-14MPa, and default setting is 6MPa.Flat cold-rolled sheet thickness be after 0.15mm-3.0mm, width 800mm-1800mm full annealing steel plate strip.
A control method for hydraulic press down system, when when surrendering the steel that is greater than 150Mpa, comprises the following steps: step 1, close the second servo valve B; Step 2, opens the first servo valve A; Step 3, opens back pressure feedway S.The surrender of steel is between 150Mpa-500Mpa, and back pressure feedway S adopts default value 6Mpa.The surrender of steel is greater than 500Mp, and back pressure feedway S adopts 3Mpa.
A control method for hydraulic press down system, when when surrendering the steel at 100Mpa-150Mpa, comprises the following steps: step 1, close the first servo valve A; Step 2, opens the second servo valve B; Step 3, opens back pressure feedway S.The thickness of steel is between 0.3-2.5mm, and back pressure feedway S adopts 6Mpa.The thickness of steel is less than or equal to 0.5mm, and described back pressure feedway S adopts 12Mpa.
In the time using separate single frame planisher of the present invention to use hydraulic press down system.
Be directed to the flat cold-rolled sheet (general surrender between 150Mpa-500Mpa, thickness is between 0.3mm-2.5mm) of common steel grade, close low discharge, high-precision the second servo valve B, open the first servo valve A of large flow.System back pressure adopts default value 6MPa.Namely adopt single the first servo valve A to control, now the first servo valve A adopts the moog electrohydraulic servo valve of D661-4506C series, and this is also the control method of traditional design.Can meet the skin pass rolling that roll-force is positioned at intermediateness.
Be directed to the IF mild steel (100MPa≤surrender≤150MPa, thickness are at 0.5mm-2.0mm) of common low surrender, open low discharge, high-precision the second servo valve B, close the first servo valve A of large flow.System back pressure adopts default value 6MPa.Namely adopt single the second servo valve B to control, in this case, B valve adopts the moog electrohydraulic servo valve of 760 series, because the second servo valve B flow is little, response accuracy is high, has ensured the stable rolling in little roll-force situation.
Be directed to the IF mild steel (100MPa≤surrender≤150MPa, thickness≤0.5mm) of ultra-thin specification, open low discharge, high-precision the second servo valve B, close the first servo valve A of large flow.Back pressure feedway is brought up to 12MPa.Namely adopt the pattern of the second servo valve B and back pressure feedway co-controlling.Because the second servo valve B flow is little, response accuracy is high, by reducing the pressure drop requirement of servo valve, ensure stability and the required precision of system simultaneously.Realize the stable rolling of the IF steel of ultralow surrender, thin specification.
Be directed to the thick size high-tensile steel (surrender > 500Mp) that need to stablize large roll-force, close low discharge, high-precision the second servo valve B, open the first servo valve A of large flow.Back pressure feedway is reduced to 3MPa.Namely adopt the pattern of the first servo valve A and back pressure feedway co-controlling.Because the first servo valve A flow is large, response is fast, by reducing the pressure drop requirement of servo valve, ensure stability and the required precision of system simultaneously.Realize the stable rolling of the high-strength steel of superelevation surrender, thick specification.
By adopt the control by stages of the first servo valve A and the second servo valve B being used in combination by the first servo valve A and the second servo valve B and back pressure feedway in the hydraulic system of single chassis planisher independently, make the stable rolling power ability of system to minimum roll-force and the expansion of maximum rolling force both direction, the single chassis of this flat cold-rolled sheet hydraulic press down system for planisher (using by the second servo valve B and back pressure feedway) will provide the system capability of stablizing minimum roll-force to expand downwards, realizes the little roll-force ability of high-accuracy stable of 100t; (use by the first servo valve A and back pressure feedway) rolling power of milling train maximum is improved simultaneously, realize stable rolling more than 1300t.Thereby the system control accuracy between little roll-force limit region has been improved and large roll-force limit region between system control accuracy had very big raising.
Separate single frame planisher provided by the invention is greater than the second servo valve with the flow of the first servo valve of hydraulic press down system, first servo valve one end with depress cylinder and be connected, the other end is connected with pump, second servo valve one end with depress cylinder and be connected, the other end is connected with described pump, open the first servo valve or the second servo valve according to different flat cold-rolled sheets, fluid in pump is transported to and depresses cylinder, back pressure feedway with depress cylinder and be connected, provide pressure for depressing cylinder, solve that the little roll-force of mild steel is stablized skin pass rolling and super-high strength steel is stablized the incompatible problem of skin pass rolling, cost will be realized low, production kind is complete, the modern production requirement that quality uniformity requirement is high.
It should be noted last that, above detailed description of the invention is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. a separate single frame planisher hydraulic press down system, for offering the pressure of pump to depress cylinder, for skin pass rolling flat cold-rolled sheet; It is characterized in that, comprising: the first servo valve A, the second servo valve B and back pressure feedway S; Described the first servo valve A is electrohydraulic servo valve; Described the second servo valve B is electrohydraulic servo valve; The flow of described the first servo valve A is greater than described the second servo valve B; Described first servo valve A one end with described in depress cylinder and be connected, the other end is connected with described pump; Described second servo valve B one end with described in depress cylinder and be connected, the other end is connected with described pump; Described back pressure feedway S with described in depress cylinder and be connected.
2. hydraulic press down system according to claim 1, is characterized in that, described press down system also comprises: the first hydraulic control one-way valve Fa and the second hydraulic control one-way valve Fb; Described the first servo valve A by described the first hydraulic control one-way valve Fa with described in depress cylinder and be connected; Described the second servo valve B by described the second hydraulic control one-way valve Fb with described in depress cylinder and be connected.
3. hydraulic press down system according to claim 1, is characterized in that, described press down system also comprises: the first solenoid directional control valve Xa and the second solenoid directional control valve Xb; Described the first solenoid directional control valve Xa is connected with described the first servo valve A, for controlling the switching of described the first servo valve A; Described the second solenoid directional control valve Xb is connected with described the second servo valve B, for controlling the switching of described the second servo valve B.
4. hydraulic press down system according to claim 1, is characterized in that: the device of depressing cylinder rod chamber that described back pressure feedway S is proportional pressure-relief valve control; The back pressure value capable of dynamic modulation that described back pressure feedway S provides.
5. the control method based on hydraulic press down system claimed in claim 1, for surrendering the steel that is greater than 150Mpa, is characterized in that, comprises the following steps: step 1, close the second servo valve B; Step 2, opens the first servo valve A; Step 3, opens back pressure feedway S.
6. control method according to claim 5, is characterized in that: the surrender of described steel is between 150Mpa-500Mpa, and described back pressure feedway S adopts default value 6Mpa.
7. control method according to claim 5, is characterized in that: the surrender of described steel is greater than 500Mp, and described back pressure feedway S adopts 3Mpa.
8. the control method based on hydraulic press down system claimed in claim 1, for surrendering the steel at 100Mpa-150Mpa, is characterized in that, comprises the following steps: step 1, close the first servo valve A; Step 2, opens the second servo valve B; Step 3, opens back pressure feedway S.
9. control method according to claim 8, is characterized in that: the thickness of described steel is between 0.3-2.5mm, and described back pressure feedway S adopts 6Mpa.
10. control method according to claim 8, is characterized in that: the thickness of described steel is less than or equal to 0.5mm, and described back pressure feedway S adopts 12Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410253224.3A CN104043655A (en) | 2014-06-09 | 2014-06-09 | Hydraulic screw down system for temper mill with independent single rack and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410253224.3A CN104043655A (en) | 2014-06-09 | 2014-06-09 | Hydraulic screw down system for temper mill with independent single rack and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104043655A true CN104043655A (en) | 2014-09-17 |
Family
ID=51497329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410253224.3A Pending CN104043655A (en) | 2014-06-09 | 2014-06-09 | Hydraulic screw down system for temper mill with independent single rack and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104043655A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413851A (en) * | 2017-05-08 | 2017-12-01 | 河钢股份有限公司承德分公司 | A kind of method of the smooth diamond plate of hot-rolled leveling unit |
| CN110280603A (en) * | 2019-06-25 | 2019-09-27 | 太原晋西春雷铜业有限公司 | The small working modulus control method for rolling of metal plates and strips |
| CN112203782A (en) * | 2018-05-11 | 2021-01-08 | 穆尔和本德公司 | Roll stand with hydraulic assembly for adjusting roll gap and method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57103712A (en) * | 1980-12-22 | 1982-06-28 | Nippon Steel Corp | Combined-use multiple rolling mill |
| CN101704037A (en) * | 2009-11-02 | 2010-05-12 | 一重集团大连设计研究院有限公司 | Hydraulic loop system for controlling roll gap of all-hydraulic flattening machine |
| CN101837375A (en) * | 2009-12-24 | 2010-09-22 | 中冶南方工程技术有限公司 | Master-salve control system in rolling mill screw-down system |
| CN102310091A (en) * | 2011-08-03 | 2012-01-11 | 中冶南方工程技术有限公司 | Back pressure system for rolling force control of flattening machine |
| CN103008362A (en) * | 2012-11-27 | 2013-04-03 | 中色科技股份有限公司 | Hydraulic press-down parallel servo control method and loop for plate and strip rolling mill |
| CN203900112U (en) * | 2014-06-09 | 2014-10-29 | 首钢总公司 | Hydraulic pressing-down system for temper mill with independent single machine frame |
-
2014
- 2014-06-09 CN CN201410253224.3A patent/CN104043655A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57103712A (en) * | 1980-12-22 | 1982-06-28 | Nippon Steel Corp | Combined-use multiple rolling mill |
| CN101704037A (en) * | 2009-11-02 | 2010-05-12 | 一重集团大连设计研究院有限公司 | Hydraulic loop system for controlling roll gap of all-hydraulic flattening machine |
| CN101837375A (en) * | 2009-12-24 | 2010-09-22 | 中冶南方工程技术有限公司 | Master-salve control system in rolling mill screw-down system |
| CN102310091A (en) * | 2011-08-03 | 2012-01-11 | 中冶南方工程技术有限公司 | Back pressure system for rolling force control of flattening machine |
| CN103008362A (en) * | 2012-11-27 | 2013-04-03 | 中色科技股份有限公司 | Hydraulic press-down parallel servo control method and loop for plate and strip rolling mill |
| CN203900112U (en) * | 2014-06-09 | 2014-10-29 | 首钢总公司 | Hydraulic pressing-down system for temper mill with independent single machine frame |
Non-Patent Citations (2)
| Title |
|---|
| 张绍九: "《液压同步系统》", 31 May 2010, 化学工业出版社 * |
| 贺文健等: "平整机轧制力特性控制技术的改进", 《机械工程师》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413851A (en) * | 2017-05-08 | 2017-12-01 | 河钢股份有限公司承德分公司 | A kind of method of the smooth diamond plate of hot-rolled leveling unit |
| CN107413851B (en) * | 2017-05-08 | 2019-11-12 | 河钢股份有限公司承德分公司 | A kind of method of the smooth diamond plate of hot-rolled leveling unit |
| CN112203782A (en) * | 2018-05-11 | 2021-01-08 | 穆尔和本德公司 | Roll stand with hydraulic assembly for adjusting roll gap and method thereof |
| CN112203782B (en) * | 2018-05-11 | 2023-08-18 | 穆尔和本德公司 | Roll stand with hydraulic assembly for adjusting roll gap and method thereof |
| CN110280603A (en) * | 2019-06-25 | 2019-09-27 | 太原晋西春雷铜业有限公司 | The small working modulus control method for rolling of metal plates and strips |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102189119B (en) | Process for controlling shape of hot-rolled flat-rolled high-grade pipeline steel plate by using single-rack steckel mill | |
| CN113505452B (en) | Comprehensive optimization method for setting rolling schedule of ultra-high strength steel in six-stand cold rolling mill | |
| CN102755996A (en) | Method for eliminating local abrasion of flat roll working roll | |
| CN105268748B (en) | Productized hot rolling load distribution method | |
| CN108326042B (en) | The control method of hot rolling thin gauge decorative pattern roll bending plate shape | |
| CN104001734B (en) | Pressure leveling device for hot rolling coiling pinch roll and control method | |
| CN105268746A (en) | Leveling method for cross break defects on surface of hot-rolled and acid-pickled plate | |
| CN103203369A (en) | Plate shape control method for hot-rolled high-strength thin strip steel | |
| CN103084408A (en) | Strip steel surface roughness control method suitable for double-stand temper mill set | |
| CN104438355A (en) | Hot rolling flattening technology for eliminating strip steel wave shape defects | |
| CN105598183A (en) | Hot rolling high-order curve work roll shifting strategy control taking both wave shape and section into consideration | |
| CN105013860A (en) | Control method for stable coiling of head of hot-rolled high-strength steel | |
| CN102764789A (en) | Method for producing outer plate of automobile | |
| CN108213087B (en) | A method of dispersing CVC work roll shifting positions | |
| CN105251779A (en) | Control method for surface oxidation pocking defects of hot-rolled pickled plate | |
| CN101658870A (en) | Optimization method of rolling rhythm of single-stand four-high rolling mill | |
| CN101791648A (en) | Process for stamping stainless steel thick plate | |
| CN203900112U (en) | Hydraulic pressing-down system for temper mill with independent single machine frame | |
| CN109821966B (en) | Plasticized fine blanking forming process based on crack initiation control | |
| KR101230160B1 (en) | Martensitic stainless steel and Method for manufacturing it | |
| CN105032946B (en) | Planisher roll shifting operating method | |
| CN204234458U (en) | A kind of mould steel Continuous mill train | |
| CN102553931A (en) | Configuration method of precision rolling frame working roll | |
| CN101956125B (en) | Flexible manufacture method of steel in thin gauge, low alloy and high tensity series | |
| CN105312324A (en) | Production method for niobium or tantalum band foil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140917 |
|
| RJ01 | Rejection of invention patent application after publication |