CN101921951A - Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof - Google Patents
Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof Download PDFInfo
- Publication number
- CN101921951A CN101921951A CN2009100338163A CN200910033816A CN101921951A CN 101921951 A CN101921951 A CN 101921951A CN 2009100338163 A CN2009100338163 A CN 2009100338163A CN 200910033816 A CN200910033816 A CN 200910033816A CN 101921951 A CN101921951 A CN 101921951A
- Authority
- CN
- China
- Prior art keywords
- rolling
- hot
- steel plate
- cold
- aluminum
- 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
Abstract
The invention relates to a hot-rolling thin steel plate for cold formation, in particular to a low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and a manufacturing method thereof, mainly solving the technical problems of poor aging resistance and slightly poor product purification degree of the traditional low-aluminum hot-rolling and cold-forming thin plate. The low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation comprises the following elements in percentage by weight: 0.04%-0.08% of C, not more than 0.03% of Si, 0.2%-0.3% of Mn, not more than 0.025% of P, not more than 0.020% of S, 0.010%-0.018% of AlT and the balance of Fe. In the process control, the heating temperature of the hot-rolling plate is 1130 to 1180 DEG C, the rough-rolling ending temperature is 1000 to 1040 DEG C, the finish-rolling starting temperature is 920 to 950 DEG C, the finish-rolling ending temperature is 850 to 880 DEG C, and the rolling temperature is 550 to 650 DEG C. The hot-rolling thin steel plate obtained in the manufacturing method is directly used for cold formation and punching deformation or used as a raw plate of a cold-roll steel plate.
Description
Technical field:
The present invention relates to hot-rolling thin steel plate for cold, particularly a kind of low-aluminum-content high-aging-resistance hot-rolling thin steel plate for cold formation and manufacture method, cold-forming is with referring to the raw sheet that is directly used in cold-forming, punching press distortion or is used as cold-rolled steel sheet.
Background technology:
The hot rolled steel sheet that is used for cold-forming generally adopts carbon aluminium-killed steel, requires to have good cold-forming processibility.Produce the content of C and N, particularly N in the strict control steel of this class steel; Non-metallic inclusion is few as far as possible, molten steel cleanliness factor height, and chemical Composition Control is accurate, and molten iron must carry out desiliconization, dephosphorization, desulfurization and the processing of skimming before steel-making.To control appropriate oxygen level in the steelmaking process, in order to avoid excessive deoxidation products is brought ladle into.To adopt the pushing off the slag technology during converter tapping.In order to reduce non-metallic inclusion, change the performance and the form of inclusion, improve the cleanliness factor of molten steel, and suitable continuous casting and steel ingot base heat send requirement, also must carry out external refining.This type of steel production in to add a certain amount of Al, Al has two effects in this type of steel, the one, deoxidation, another effect are to form an amount of AlN to guarantee that product just has good formability stampability.Therefore the general requirement hot rolled steel sheet that is used for cold-forming requires Al content to be within certain scope.Prior art requires to be used for the full aluminium content of latten of cold-forming (hereinafter to be referred as Al
T) 〉=0.020%.But there is following problem in the aluminium of aluminium too high levels in the steel:
1. at continuous casting be, easily make ladle nozzle produce buildup, make nozzle clogging;
2. remaining aluminium content height causes that alumina inclusion increases in the steel in the steel, influences the molten steel purity;
3.Al content increases, the iron scale of steel slab surface is difficult to remove in course of hot rolling, and just product surface forms the iron scale defective easily, influences product surface quality and following passage user's use.
All exist interstitial atoms such as C, N in a large number in the material of general aluminium killed steel, because these atoms produce the Ke Shi air mass, the pinning dislocation is in case distortion produces yield phenomenon after surpassing pining force.Soft steel is carried out a spot of viscous deformation, then yield-point can temporarily not occur, but will place or under comparatively high temps, be incubated for some time in that room temperature is long-term through the material of a small amount of viscous deformation, yield-point can reappear, and yielding stress improves, this phenomenon is called strain aging, can influence the normal use of material.Particularly the higher part of some surface requirements requires the impact briquetting rear surface slip line or barring phenomenon can not occur.
Disclosed a kind of impact stage low carbon steel hot-rolled sheet of Chinese patent CN100447280C and manufacture method thereof, it is applicable to ferrite rolling technology, and the finish rolling temperature out is 730～800 ℃, and coiling temperature is 650～720 ℃.Realize the performance of latten by this technology.But the final rolling temperature that present industrial latten production unit can stably manufactured generally is higher than 820 ℃, is difficult to realize the disclosed ferrite rolling technology of this technology.And this technology finish rolling temperature out and coiling temperature are approaching, are difficult to realize so little temperature drop at the hot-rolling laminar cooling section, therefore are difficult to guarantee high coiling temperature, so also just are difficult to realize the disclosed performance of this technology.
Summary of the invention:
The purpose of this invention is to provide latten and manufacture method thereof that the high ageing resistance performance of a kind of low-aluminum-content is used for cold-forming, mainly solve existing low aluminothermy and roll anti-effective difference of cold-forming thin plate and the poor slightly technical problem of product purity.
The present invention takes following technical scheme to realize:
A kind of low-aluminum-content high-aging-resistance hot-rolling thin steel plate for cold formation, the weight percent of its component is: be C:0.04～0.08%, Si :≤0.03%, Mn:0.2～0.3%, P :≤0.025%, S :≤0.020%, Al
T: 0.010～0.018%, surplus is Fe.Al
TBe preferably 0.015%.
Concrete Production Flow Chart comprises: converter smelting, external refining, continuous casting become slab, hot rolling, laminar flow cooling, batch, the hot-rolled sheet Heating temperature is 1130 ℃～1180 ℃, the roughing end temp is 1000～1040 ℃, the finish rolling start rolling temperature is 920 ℃～950 ℃, the finish rolling end temp is 850 ℃～880 ℃, and coiling temperature is 550 ℃～650 ℃.The thickness of steel plate is 1.5～4.0mm.
Al
TScope be that 0.010%～0.018% foundation is, in this scope, the moulding index of above-mentioned hot-rolling thin steel plate for cold can satisfy follow-up cold-forming and cold rolling requirement, yield strength≤the 310MPa of hot rolled steel sheet, tensile strength satisfies 270～400MPa, and elongation is greater than 35%.Total oxygen content≤the 50PPm of latten.Latten is after cold rolling greater than 65% draft, behind bell-type annealing, the level that the processability of cold-rolled products reaches is: average plastic strain ratio r value is greater than 1.1, and work hardening exponent n value is greater than 0.19, Erichsen number is greater than 9.5mm, aging index value AI≤30MPa.Work as Al
TLess than 0.010%, the free interstitial atom of the C in the steel plate, N is unfixing, and yield point elongation appears in product, the punching performance variation, and the ageing resistance performance more worsens.Work as Al
TGreater than 0.018% o'clock, the alumina type in the steel was mingled with increase, reduced the product purity.
Al of the present invention
TThe content preferred value is 0.015% the reasons are as follows: Al
TContent reaches the average r value in 0.015% back and almost remains on the same level, and Δ r value is minimum, and aging index value AI≤30MPa.
The invention has the beneficial effects as follows: on the basis of the processability index that satisfies hot-rolling thin steel plate for cold, adopt the composition of low-aluminum-content, have high ageing resistance performance.The present invention adopts the austenitic area rolling technology, and the finish rolling finishing temperature of employing is 850 ℃～880 ℃, and coiling temperature is 550 ℃～650 ℃, realizes easily on existing latten production unit.Hot-rolled sheet again by cold rolling, annealing process reach loud and sonorous ageing with well become novel.Molten steel purity of the present invention is controlled easily, and the steel slab surface iron scale is removed easily, has good advantages such as limit face quality.
Embodiment:
The present invention will be further described below in conjunction with embodiment 1-3.The set of dispense ratio of specific embodiment sees the following form 1:
Table 1 set of dispense ratio of the present invention, the component % that is weight percentage, surplus is
According to material composition designing requirement of the present invention, adopt molten iron pre-desulfurization, the converter top bottom blowing, the refining of LF stove, continuous casting adopts low-carbon steel protecting slag, and whole process is blown Ar protection casting, is cast into continuous casting steel billet.Continuous casting steel billet is behind the process furnace reheat, and is rolling on the Continuous Heat tandem rolling mill, and technology controlling and process sees the following form 2, and product thickness is 1.5-4.0mm.
Table 2 hot rolling technology controlled variable of the present invention
The high ageing resistance performance of the low-aluminum-content that utilizes aforesaid method to obtain is used for the latten of cold-forming and sees Table 3 by the relevant forming property of product after cold rolling, the annealing:
The correlated performance index of table 3 coiled sheet sample and cold rolled annealed attitude
Claims (3)
1. low-aluminum-content high-aging-resistance hot-rolling thin steel plate for cold formation, the weight percent of its component is: be C:0.04～0.08%, Si :≤0.03%, Mn:0.2～0.3%, P :≤0.025%, S :≤0.020%, Al
T: 0.010～0.018%, surplus is Fe.
2. low-aluminum-content high-aging-resistance hot-rolling thin steel plate for cold formation according to claim 1 is characterized in that Al
TWeight percent is 0.015%.
3. method of making the described low-aluminum-content high-aging-resistance hot-rolling thin steel plate for cold formation of claim 1, comprise: converter smelting, external refining, continuous casting become slab, hot rolling, laminar flow cooling, batch, it is characterized in that the hot-rolled sheet Heating temperature is 1130 ℃～1180 ℃, the roughing end temp is 1000～1040 ℃, the finish rolling start rolling temperature is 920 ℃～950 ℃, the finish rolling end temp is 850 ℃～880 ℃, and coiling temperature is 550 ℃～650 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910033816A CN101921951B (en) | 2009-06-16 | 2009-06-16 | Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910033816A CN101921951B (en) | 2009-06-16 | 2009-06-16 | Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101921951A true CN101921951A (en) | 2010-12-22 |
| CN101921951B CN101921951B (en) | 2012-08-29 |
Family
ID=43337162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910033816A Active CN101921951B (en) | 2009-06-16 | 2009-06-16 | Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101921951B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080194A (en) * | 2011-03-08 | 2011-06-01 | 南京钢铁股份有限公司 | Large-deformation-preventing pipeline steel with excellent aging resistance and production method thereof |
| CN102766800A (en) * | 2011-05-05 | 2012-11-07 | 上海梅山钢铁股份有限公司 | Steel for hard tinplate bottle caps and production method thereof |
| CN103320685A (en) * | 2012-03-22 | 2013-09-25 | 上海梅山钢铁股份有限公司 | Hard tinned sheet steel and its production method |
| EP2792763A1 (en) * | 2011-12-12 | 2014-10-22 | JFE Steel Corporation | Steel sheet with excellent aging resistance, and method for producing same |
| CN112813347A (en) * | 2020-12-30 | 2021-05-18 | 广西柳钢华创科技研发有限公司 | Ferrite rolling production method of high-r-value low-carbon aluminum killed steel |
| CN115505817A (en) * | 2021-06-07 | 2022-12-23 | 上海梅山钢铁股份有限公司 | Production method of low-thickness low-carbon B-containing hot rolled steel plate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170951C (en) * | 1998-05-29 | 2004-10-13 | 东洋钢钣股份有限公司 | Resin cladded steel plate for thin wall-type tensile can and its used steel plate |
-
2009
- 2009-06-16 CN CN200910033816A patent/CN101921951B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080194A (en) * | 2011-03-08 | 2011-06-01 | 南京钢铁股份有限公司 | Large-deformation-preventing pipeline steel with excellent aging resistance and production method thereof |
| CN102080194B (en) * | 2011-03-08 | 2012-06-06 | 南京钢铁股份有限公司 | Large-deformation-preventing pipeline steel with excellent aging resistance and production method thereof |
| CN102766800A (en) * | 2011-05-05 | 2012-11-07 | 上海梅山钢铁股份有限公司 | Steel for hard tinplate bottle caps and production method thereof |
| EP2792763A1 (en) * | 2011-12-12 | 2014-10-22 | JFE Steel Corporation | Steel sheet with excellent aging resistance, and method for producing same |
| EP2792763A4 (en) * | 2011-12-12 | 2014-11-19 | Jfe Steel Corp | Steel sheet with excellent aging resistance, and method for producing same |
| US9828648B2 (en) | 2011-12-12 | 2017-11-28 | Jfe Steel Corporation | Steel sheet with excellent aging resistance property and method for producing the same |
| CN103320685A (en) * | 2012-03-22 | 2013-09-25 | 上海梅山钢铁股份有限公司 | Hard tinned sheet steel and its production method |
| CN112813347A (en) * | 2020-12-30 | 2021-05-18 | 广西柳钢华创科技研发有限公司 | Ferrite rolling production method of high-r-value low-carbon aluminum killed steel |
| CN112813347B (en) * | 2020-12-30 | 2022-03-01 | 广西柳钢华创科技研发有限公司 | Ferrite rolling production method of high-r-value low-carbon aluminum killed steel |
| CN115505817A (en) * | 2021-06-07 | 2022-12-23 | 上海梅山钢铁股份有限公司 | Production method of low-thickness low-carbon B-containing hot rolled steel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101921951B (en) | 2012-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101914725B (en) | Low-carbon ultra-deep punching cold-rolling steel sheet and production method thereof | |
| CN103695619B (en) | A kind of manufacture method of high magnetic strength common orientation silicon steel | |
| CN101805873B (en) | Low-cost and high-strength steel for automobile crossbeam and manufacturing method thereof | |
| CN104419865B (en) | A kind of easy-open end cold-rolled tin plate and production method thereof | |
| CN104946968B (en) | A kind of beverage can bottom cold-rolled tin plate and its production method | |
| CN101921951B (en) | Low-aluminum-content and high-aging-resistance hot-rolling thin steel plate for cold formation and manufacturing method thereof | |
| CN104946969A (en) | Hot-rolled pickled steel plate for air conditioner compressor housings and manufacturing method thereof | |
| CN104928457A (en) | Method for producing high-ductility ferritic stainless steel band through furnace roll and continuous mill | |
| CN105441795B (en) | A kind of LED lead frame low-carbon cold rolling steel plate and its production method | |
| CN104264038A (en) | 440 MPa-grade continuous-annealed and cold-rolled structural steel plate and production process thereof | |
| CN102912221A (en) | Large-thickness structural steel plate for high-rise building and production method thereof | |
| CN103509996B (en) | The manufacture method of tensile strength 400MPa grade high-strength carbon manganese structure iron | |
| CN102002635A (en) | Steel for pressure container in thick specification and preparation method thereof | |
| CN103789625A (en) | Method for producing micro-alloyed cold-rolled low-alloy high-strength steel by virtue of cover annealing line | |
| CN104831207A (en) | Thin gauge 600MPa grade hot galvanized plate production method | |
| CN102925794A (en) | Cold-rolled steel strip for double-layer welded tube | |
| CN109957717A (en) | A kind of precision stamping hot rolled steel plate containing B and its manufacturing method | |
| CN107502819A (en) | A kind of following Thin Specs cold-rolled biphase steels of 600MPa levels 0.6mm and preparation method thereof | |
| CN100560773C (en) | A kind of high-strength anti-fatigue steel products and manufacture method thereof | |
| CN101892419B (en) | Method for producing low-carbon low-silicon high magnetic induction non-oriented electrical steel plate by CSP process | |
| CN103361552A (en) | V-N microalloying 460MPa-level thick plate and manufacturing method thereof | |
| CN104046889A (en) | Cold-rolled continuous-annealed steel strip for guide rails and production method thereof | |
| CN105861929B (en) | A kind of 440MPa levels Cold Rolled High Strength IF Steel and its production method | |
| CN105256225A (en) | Cold-rolled steel plate for elevator and preparation method for cold-rolled steel plate | |
| CN102758128B (en) | Method for producing deep-draw hot-rolled strip steel by micro carbon aluminium killed steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |