CN108611563A - A kind of CSP flows excellent formability energy mild steel steel plate and its manufacturing method - Google Patents
A kind of CSP flows excellent formability energy mild steel steel plate and its manufacturing method Download PDFInfo
- Publication number
- CN108611563A CN108611563A CN201810436196.7A CN201810436196A CN108611563A CN 108611563 A CN108611563 A CN 108611563A CN 201810436196 A CN201810436196 A CN 201810436196A CN 108611563 A CN108611563 A CN 108611563A
- Authority
- CN
- China
- Prior art keywords
- manufacturing
- steel plate
- mild steel
- steel
- excellent formability
- 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
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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
Abstract
The present invention provides a kind of CSP flows excellent formability energy mild steel steel plates and its manufacturing method, chemical component weight percentage content to be：C：0.045 0.065%, Si：0.010~0.060%, Mn：0.08 0.30%, P：≤ 0.015%, S：≤ 0.010%, Al：0.020 0.060%, remaining is mingled with for Fe and inevitably.Compared with prior art, technical scheme of the present invention makes mild steel steel plate obtain excellent forming property, can also apparent mild steel steel plate iron scale thickness, for needing the mild steel steel plate by pickling process, its acid solution dosage can be reduced, its production efficiency is improved.This mild steel steel plate is mainly used for the manufacture of various shaped structure parts.
Description
Technical field
The present invention relates to the technical field of producing of Steel Products of Thin Slab Casting, more particularly to a kind of CSP flows are excellent
Forming property mild steel steel plate and its manufacturing method.
Background technology
CSP flows produce the mild steel that carbon content is 0.045-0.065%, due to its technique feature itself, organize phase
To tiny, intensity is relatively high, yield strength is about 290-330MPa, and tensile strength is about 350-390MPa, and strain hardening refers to
Number n values are 0.20 hereinafter, moulding strain ratioIt is worth 1.0 hereinafter, so that the mild steel steel formability performance phase of CSP productions
To poor.
About reduce CSP flow mild steel armor plate strength, the method that improves its forming property declare patent have it is multinomial.Example
Such as：Patent CN 106244921A2016 December 21 disclosed it is a kind of produced using rolling in ferrite domains in CSP producing lines it is low
The method of carbon steel, chemical composition and weight percent content are C：0.02-0.06%, Si：0.01-0.04%, Mn：0.1-
0.3%, remaining is impurity elements and the Fe such as P, S.Its process characteristic is using low-temperature heat, zerolling and high temperature coiling temperature
Degree, and the reduction ratio of F1 and F2 racks, F1-F3 interstand coolings water and F4 inlet temperatures are controlled, it is final to obtain 3.0mm thickness
The mild steel of degree is organized as coarse polygonal ferrite, yield strength 210MPa, tensile strength 330MPa, yield strength
About 27.33% is reduced, tensile strength reduces about 13.40%.But it is super that the rolling in ferrite domains that this method uses is only suitable for rolling
Mild steel (C：0.015%-0.04%, Mn<And gapless atomic steel (C 0.30%)<0.005%, Mn<0.20%), for carbon
Content is higher than 0.050% mild steel, and rolling in ferrite domains is simultaneously not suitable for.
In addition, also patent discloses one kind and in mild steel adds boron element, reduces its intensity and improve the side of forming property
Method.Such as：Patent CN 101775557A on July 14th, 2010 disclose a kind of low-carbon boron-containing mild steel and preparation method thereof,
Chemical composition and weight percent content are C：0.001-0.012%, Si：0.002-0.10%, Mn：0.01-0.25%, Al：
0.025-0.075%, B：0.001-0.006%, P≤0.025%, S≤0.025%, N≤0.040%, Cu+Cr+Ni≤
0.15%, remaining is impurity elements and the Fe such as P, S.Preparation method includes：Converter smelting, RH vacuum decarburizations, ladle aluminium deoxidation,
Ladle is fed boracic core-spun yarn, continuous casting, heating, rolling, cooling, is batched.The 2.75-2.90mm mild steel ferrite of final production is brilliant
Grain size category is 7-8 grades, and lower yield strength≤200MPa, tensile strength≤300MPa extends main utilization rate A50>=50%.But
This method needs to increase RH processes, can increase production cost.
Patent CN1450180A2015 disclosed a kind of method improving hot rolled plate plate cold-forming property July 15,
Its chemical composition and weight percent content are C：≤ 0.06%, Si：≤ 0.05%, Mn：0.15-0.30%, Al：0.020-
0.050%, B：0.001-0.01%, P≤0.025%, S≤0.010%, N≤0.006%, Cu+Cr+Ni≤0.25%, remaining
For the impurity elements such as P, S and Fe.By converter smelting, continuous casting, processes, the 1.2- of final production such as heating, roll, batch
5.0mm mild steel armor plate strength and hardness reduce, and elongation percentage improves, yield strength 280-298MPa, and tensile strength is
352-372MPa, elongation percentage 29.5-31.0%, Vickers hardness 102-108HV, yield strength reduce about 12.5%, tension
Strength reduction about 9.74%.But yield strength, the tensile strength decline degree of this method mild steel are relatively small.
In conclusion reducing the intensity of mild steel steel plate at present, improve it and shape performance, mainly by using iron element
Body rolling mill practice or addition boron element.For the mild steel that carbon content is 0.045-0.065%, these methods or unsuitable,
Or production cost can be increased, there is not technology to be related under the premise of not increasing production cost yet at present, reduces its intensity and raising
The method of forming property.
Invention content
The purpose of the present invention is to provide a kind of CSP flows excellent formability energy mild steel steel plates, are matched by control element
Than reducing its intensity, improving forming property.
The present invention also provides a kind of manufacturing methods of CSP flows excellent formability energy mild steel steel plate, by designing smelting
Refining, heating, hot rolling, cooling and coiling technique, can make mild steel steel plate obtain excellent forming property.
Technical scheme is as follows：
A kind of CSP flows excellent formability energy mild steel steel plate provided by the invention, chemical component weight percentage contain
Amount is：C：0.045-0.065%, Si：0.010~0.060%, Mn：0.08-0.30%, P：≤ 0.015%, S：≤
0.010%, Al：0.020-0.060%, remaining is Fe and is inevitably mingled with.
A kind of manufacturing method of CSP flows excellent formability energy mild steel steel plate provided by the invention, includes the following steps：
1) converter smelting is first carried out, then LF stoves refine, then continuous casting；
2) strand enters in heating furnace and is heated；
3) it rolls, 7 rack finishing mills is entered after high-pressure water descaling and are rolled；
4) it is batched after rolling rear steel plate section cooling.
Continuous casting described in step 1) refers to being casting continuously to form the strand that thickness is 70mm.
Control strand tapping temperature is at 1050-1120 DEG C in step 2).
Finishing temperature control is at 780-820 DEG C in step 3).
Step 4) the section cooling refers to back segment section cooling；
Step 4) is specially：Cooling velocity is 20-40 DEG C/s, controls coiler plate temperature after cooling at 660-700 DEG C.
Further, hot-rolled low carbon coil of strip is air-cooled to room temperature after step 4).
Further, its metallographic structure of the mild steel steel plate of production be irregular polygon ferrite and a small amount of pearlite,
Ferrite grain size is 7.0-8.0 grades.
The present invention is using ultralow C, low Si, low P, low S, C：0.045-0.065% is primarily to prevent a large amount of carbide
It is precipitated, increases the precipitating reinforcing effect of tissue, cause band hardness of steel to increase and be deteriorated with forming property.Si：0.010~0.060%,
On the one hand in order to reduce the solid solution strengthening effect of Si, band hardness of steel is reduced, cold-forming property is improved；On the other hand Si in order to prevent
Too high levels generate fayalite (2FeO.SiO with FeO association reactions at high temperature2), fayalite is at 1177 DEG C or less
Solid-state, can firmly anchoring increases dephosphorization difficulty in strip matrix skin by FeO；Mn contents are 0.08-0.30%, mainly for
It fixes S and prevents band hardness of steel excessive；P, S can have an adverse effect to the forming property of strip as impurity element, it should tight
Lattice control, and the lower content the better.Al content is 0.020-0.060%, and Al is used mainly as deoxidier, if Al content mistake
A large amount of AlN can be precipitated in height, increase and intensity effect is precipitated, and have an adverse effect to reducing band hardness of steel.
The present invention is in hot rolling technology design, and for heating and temperature control at 1050-1120 DEG C, main purpose is to avoid temperature
The fayalite that melting is generated higher than 1177 DEG C, when slab tapping temperature is less than 1177 DEG C, the fayalite solidification of molten condition
And firmly anchoring increases the removal difficulty of iron scale in band steel matrix by FeO；Finishing temperature control is at 780-820 DEG C, mesh
One side be ferrite transformation temperature region roll, reduce draught pressure, improve rolling stability；On the other hand it is control
The iron scale thickness generated in the operation of rolling.Oiler temperature control is at 660-700 DEG C, primarily to ferrite is allowed to have occurred
Full Static Recrystallization and crystal grain are fully grown up, and are reduced the intensity of strip, are improved its elongation percentage.
Use mild steel steel plate metallographic structure produced by the invention for polygonal ferrite and a small amount of pearlite, ferrite is brilliant
Granularity is 7.0-8.0 grades, and the mild steel steel plate metallographic structure of CSP common process production is isometric ferrite, ferrite grain size
It is 9.5-10.5 grades.Relative to CSP common process, mild steel steel plate ferrite grain size produced by the invention reduces by 2 grades.
Using mild steel steel plate yield strength Rp0.2=220-250MPa, tensile strength Rm=320- produced by the invention
350MPa, elongation percentage A80=35-37%, strain hardening exponent n=0.21-0.23, plastic strain ratioAnd
Mild steel steel plate yield strength Rp0.2=270-300MPa, the tensile strength Rm=360-390MPa of CSP common process production,
Elongation percentage A80=32-34%, strain hardening exponent n=0.18-0.20,Relative to CSP common process, present invention life
The mild steel steel plate yield strength of production reduces 16.67-18.52%, and tensile strength reduces about 10.26-11.11%, and elongation percentage carries
High about 5.88-6.25%, n values improve about 15.00-16.67%,Value improve about 13.88-18.00%, can significantly improve its at
Shape performance.
Use the iron scale average thickness of mild steel produced by the invention for 4.377 μm, and the production of CSP common process
Mild steel steel-plate iron oxide scale average thickness is 8.677 μm.Relative to CSP common process, mild steel steel plate produced by the invention
Iron scale thickness reduces 49.56%, it is possible to reduce pickling process acid solution dosage improves pickling efficiency.
Compared with prior art, technical scheme of the present invention makes mild steel steel plate obtain excellent forming property, can also be bright
The iron scale thickness of aobvious mild steel steel plate can reduce its acid solution use for needing the mild steel steel plate by pickling process
Amount, improves its production efficiency.This mild steel steel plate is mainly used for the manufacture of various shaped structure parts.
Description of the drawings
Fig. 1 is the corresponding mild steel metallographic structure of the present invention；
Fig. 2 is the corresponding mild steel metallographic structure of CSP common process.
Specific implementation mode
Technical scheme of the present invention is explained below by specific embodiment.
Embodiment 1
A kind of CSP flows excellent formability energy mild steel steel plate, chemical component weight percentage content such as the following table 1.
A kind of manufacturing method of CSP flows excellent formability energy mild steel steel plate, method are：
1) converter smelting is first carried out, then LF stoves refine, then continuous casting；
2) strand enters in heating furnace and is heated；
3) it rolls, 7 rack finishing mills is entered after high-pressure water descaling and are rolled；
4) it is batched after rolling rear steel plate section cooling.
Control thickness of strand is 70mm, control heating temperature, finishing temperature, section cooling speed and coiling temperature.
Specific process parameter such as the following table 2.
Embodiment 2-5
A kind of CSP flows excellent formability energy mild steel steel plate, chemical component weight percentage content such as the following table 1.
A kind of manufacturing method of CSP flows excellent formability energy mild steel steel plate, method is the same as embodiment 1, concrete technology ginseng
Number such as the following table 2：
Comparative example
Its chemical component weight percentage content such as the following table 1.
Specific manufacturing approach craft：Control thickness of strand is 70mm, control heating temperature, finishing temperature, section cooling
Speed and coiling temperature, specific process parameter such as the following table 2.
1 embodiment of table and comparative example actual measurement chemical composition (mass percent, wt%)
| Embodiment | C | Si | Mn | P | S | Al |
| Embodiment 1 | 0.048 | 0.028 | 0.10 | 0.012 | 0.003 | 0.025 |
| Embodiment 2 | 0.050 | 0.027 | 0.10 | 0.012 | 0.003 | 0.026 |
| Embodiment 3 | 0.052 | 0.026 | 0.11 | 0.013 | 0.003 | 0.027 |
| Comparative example | 0.050 | 0.028 | 0.10 | 0.012 | 0.003 | 0.025 |
2 embodiment of table and comparative example rolling technological parameter
Embodiment 1-3 and comparative example mechanical property are as shown in table 3, embodiment 1-3 and comparative example iron scale thickness such as table 4
It is shown.
3 embodiment of table and comparative example mechanical property
4 embodiment of table and comparative example iron scale thickness
Mild steel steel plate produced by the present invention has an excellent forming property, can also apparent mild steel steel plate iron oxide skin depth
Degree.Moreover, at low cost.
Claims (7)
1. a kind of CSP flows excellent formability energy mild steel steel plate, which is characterized in that the CSP flows excellent formability can be low
Its chemical component weight percentage content of carbon steel steel plate is：C：0.045~0.065%, Si：0.010~0.060%, Mn：0.08
~0.30%, P：≤ 0.015%, S：≤ 0.010%, Al：0.020~0.060%, remaining is mingled with for Fe and inevitably.
2. a kind of manufacturing method of CSP flows excellent formability energy mild steel steel plate described in claim 1, which is characterized in that
The manufacturing method includes the following steps：
1) converter smelting is first carried out, then LF stoves refine, then continuous casting；
2) strand enters in heating furnace and is heated；
3) it rolls, 7 rack finishing mills is entered after high-pressure water descaling and are rolled；
4) it is batched after rolling rear steel plate section cooling.
3. manufacturing method according to claim 1, which is characterized in that continuous casting described in step 1) refers to being casting continuously to form thickness to be
The strand of 70mm.
4. manufacturing method according to claim 1, which is characterized in that in step 2) control strand tapping temperature 1050~
1120℃。
5. manufacturing method according to claim 1, which is characterized in that finishing temperature control is 780~820 in step 3)
℃。
6. manufacturing method according to claim 1, which is characterized in that the step 4) section cooling refers to that back segment laminar flow is cold
But.
7. manufacturing method according to claim 1 or 6, which is characterized in that step 4) is specially：Cooling velocity is 20~40
DEG C/s, coiler plate temperature after cooling is controlled at 660~700 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810436196.7A CN108611563A (en) | 2018-05-09 | 2018-05-09 | A kind of CSP flows excellent formability energy mild steel steel plate and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810436196.7A CN108611563A (en) | 2018-05-09 | 2018-05-09 | A kind of CSP flows excellent formability energy mild steel steel plate and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108611563A true CN108611563A (en) | 2018-10-02 |
Family
ID=63662616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810436196.7A Pending CN108611563A (en) | 2018-05-09 | 2018-05-09 | A kind of CSP flows excellent formability energy mild steel steel plate and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108611563A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518197A (en) * | 2018-10-29 | 2019-03-26 | 四川天宏不锈钢有限责任公司 | A kind of production technology of hot rolling anacidity pickling low carbon steel plate |
| CN110317995A (en) * | 2019-06-03 | 2019-10-11 | 武汉钢铁有限公司 | A method of with carbon hot rolled steel plate in the CSP production good thin gauge of surface quality |
| CN110899331A (en) * | 2019-12-05 | 2020-03-24 | 马鞍山钢铁股份有限公司 | Control method of iron oxide powder on surface of hot rolled plate |
| CN111633028A (en) * | 2020-05-15 | 2020-09-08 | 武汉钢铁有限公司 | Production method for producing thin-specification low-carbon steel by ferrite rolling on CSP production line |
| CN113528960A (en) * | 2021-07-09 | 2021-10-22 | 马鞍山钢铁股份有限公司 | Steel wire for mask nose bridge clamp and production method thereof |
| CN114405996A (en) * | 2021-10-29 | 2022-04-29 | 马鞍山钢铁股份有限公司 | CSP flow low-carbon steel plate and manufacturing method thereof |
| CN114480972A (en) * | 2022-01-27 | 2022-05-13 | 马鞍山钢铁股份有限公司 | Thin-specification Ni-free weathering steel produced based on CSP process and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974821A (en) * | 2006-12-18 | 2007-06-06 | 马鞍山钢铁股份有限公司 | Production process of punch level cold rolled steel plate based on CSP technology |
| CN102071356A (en) * | 2010-12-22 | 2011-05-25 | 山西太钢不锈钢股份有限公司 | Method for preventing edge crack of low-carbon steel during rolling at high temperature |
| CN106244921A (en) * | 2016-08-30 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of method producing line employing rolling in ferrite domains production mild steel at CSP |
| JP2016221650A (en) * | 2015-06-02 | 2016-12-28 | Ｊｆｅスチール株式会社 | Method for manufacturing member of steel for machine structural use |
-
2018
- 2018-05-09 CN CN201810436196.7A patent/CN108611563A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974821A (en) * | 2006-12-18 | 2007-06-06 | 马鞍山钢铁股份有限公司 | Production process of punch level cold rolled steel plate based on CSP technology |
| CN102071356A (en) * | 2010-12-22 | 2011-05-25 | 山西太钢不锈钢股份有限公司 | Method for preventing edge crack of low-carbon steel during rolling at high temperature |
| JP2016221650A (en) * | 2015-06-02 | 2016-12-28 | Ｊｆｅスチール株式会社 | Method for manufacturing member of steel for machine structural use |
| CN106244921A (en) * | 2016-08-30 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of method producing line employing rolling in ferrite domains production mild steel at CSP |
Non-Patent Citations (2)
| Title |
|---|
| 康永林等: "《薄板坯连铸连轧钢的组织性能控制》", 31 March 2006 * |
| 张金柱等: "《薄板坯连铸装备及生产技术》", 31 August 2007 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518197A (en) * | 2018-10-29 | 2019-03-26 | 四川天宏不锈钢有限责任公司 | A kind of production technology of hot rolling anacidity pickling low carbon steel plate |
| CN110317995A (en) * | 2019-06-03 | 2019-10-11 | 武汉钢铁有限公司 | A method of with carbon hot rolled steel plate in the CSP production good thin gauge of surface quality |
| CN110317995B (en) * | 2019-06-03 | 2020-08-25 | 武汉钢铁有限公司 | Method for producing thin medium-carbon hot-rolled steel plate with good surface quality by using CSP (cast Steel plate) |
| CN110899331A (en) * | 2019-12-05 | 2020-03-24 | 马鞍山钢铁股份有限公司 | Control method of iron oxide powder on surface of hot rolled plate |
| CN110899331B (en) * | 2019-12-05 | 2022-03-01 | 马鞍山钢铁股份有限公司 | Control method of iron oxide powder on surface of hot rolled plate |
| CN111633028A (en) * | 2020-05-15 | 2020-09-08 | 武汉钢铁有限公司 | Production method for producing thin-specification low-carbon steel by ferrite rolling on CSP production line |
| CN111633028B (en) * | 2020-05-15 | 2021-09-10 | 武汉钢铁有限公司 | Production method for producing thin-specification low-carbon steel by ferrite rolling on CSP production line |
| CN113528960A (en) * | 2021-07-09 | 2021-10-22 | 马鞍山钢铁股份有限公司 | Steel wire for mask nose bridge clamp and production method thereof |
| CN114405996A (en) * | 2021-10-29 | 2022-04-29 | 马鞍山钢铁股份有限公司 | CSP flow low-carbon steel plate and manufacturing method thereof |
| CN114405996B (en) * | 2021-10-29 | 2023-08-29 | 马鞍山钢铁股份有限公司 | CSP process low-carbon steel plate and manufacturing method thereof |
| CN114480972A (en) * | 2022-01-27 | 2022-05-13 | 马鞍山钢铁股份有限公司 | Thin-specification Ni-free weathering steel produced based on CSP process and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108611563A (en) | A kind of CSP flows excellent formability energy mild steel steel plate and its manufacturing method | |
| CN105274432B (en) | 600 MPa grade high-yield-ratio high-plasticity cold-rolled steel plate and manufacturing method thereof | |
| CN104630641B (en) | 800MPa-grade high-strength high-plasticity low-carbon medium-manganese steel and manufacturing method thereof | |
| CN103255341B (en) | High-strength and high-toughness hot-rolled wear-resistant steel and preparation method thereof | |
| CN106256918B (en) | A kind of the Automobile flywheel cold-strip steel and its manufacturing method of precision stamping processing | |
| CN104651734B (en) | 1000MPa grade high-strength high-ductility medium managese steel containing aluminum and its manufacture method | |
| CN111218620B (en) | High-yield-ratio cold-rolled dual-phase steel and manufacturing method thereof | |
| CN1978689A (en) | Low-carbon hot-rolled deep-drawing steel sheet | |
| CN105401090B (en) | A kind of precision stamping automotive seat regulation tooth plate cold-rolled steel sheet and its manufacture method | |
| CN103074546A (en) | Cold-rolled strip steel for condenser tube of refrigerator and manufacturing method thereof | |
| CN105925905B (en) | 780MPa grades of hot-rolled dual-phase steels of Nb-Ti systems and its production method | |
| CN106498297B (en) | Precision stamping automotive seat adjuster fluted disc cold-rolled steel sheet and its manufacturing method | |
| JP5747249B2 (en) | High-strength steel material excellent in strength, ductility and energy absorption capacity and its manufacturing method | |
| CN103484764B (en) | Ti precipitation strength type superhigh-strength hot rolls thin plate and production method thereof | |
| CN105779874B (en) | Cr Nb system 780MPa levels hot-rolled dual-phase steels and its production method | |
| CN109136761B (en) | 980 MPa-grade high-ductility low-density austenitic steel for automobiles and preparation method thereof | |
| CN107541663A (en) | A kind of beverage can ferrostan and its production method | |
| CN114000068B (en) | Low-nitrogen ultrahigh-strength hot-rolled steel strip with thickness of 4-10mm and production method thereof | |
| CN105256223A (en) | Micro-carbon steel with low yield strength and production method thereof | |
| CN109576594A (en) | A kind of hot rolling magnetic yoke steel and its manufacturing method | |
| CN109576593A (en) | A kind of hot rolling magnetic yoke steel and its manufacturing method | |
| CN105838997B (en) | Si Mn system 780MPa grade hot-rolled dual-phase steels and its production method | |
| CN111763875A (en) | High-hardness cold-rolled electrotinning substrate for bottle cap and production method thereof | |
| CN117210758B (en) | Steel for battery shell and preparation method thereof | |
| CN114058946B (en) | Low-anisotropy high-strength high-elongation steel substrate, tin-plated plate and preparation method of tin-plated 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181002 |
|
| RJ01 | Rejection of invention patent application after publication |