CN105803313A - Thin hot galvanized steel plate and production method thereof - Google Patents

Thin hot galvanized steel plate and production method thereof Download PDF

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Publication number
CN105803313A
CN105803313A CN201610204543.4A CN201610204543A CN105803313A CN 105803313 A CN105803313 A CN 105803313A CN 201610204543 A CN201610204543 A CN 201610204543A CN 105803313 A CN105803313 A CN 105803313A
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Prior art keywords
hot
dip galvanizing
sheet steel
galvanizing sheet
thin specs
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CN201610204543.4A
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CN105803313B (en
Inventor
王敏莉
郑之旺
梁英
夏辉
张功庭
余灿生
郭韬
王平利
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/12Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/14Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses a thin hot galvanized steel plate. The steel plate comprises, by weight, 0.0010%-0.003% of C, 0.01%-0.03% of Si, 0.10%-0.16% of Mn, no more than 0.010% of P, no more than 0.009% of S, 0.010%-0.050% of Als, 0.04%-0.07% of Ti, 0.005%-0.02% of Nb, and the balance Fe and inevitable impurities. The invention further discloses a production method of the thin hot galvanized steel plate. The key technology for continuous annealing production of the thin hot galvanized steel plate is realized, the composition design is simple, the process control window in large, adaptability is high, and product surface quality is excellent.

Description

A kind of Thin Specs hot-dip galvanizing sheet steel and production method thereof
Technical field
The present invention relates to one and the invention belongs to cold rolled sheet production technical field, particularly relate to a kind of continuous annealing and produce the production method of a kind of Thin Specs hot-dip galvanizing sheet steel, the invention still further relates to described Thin Specs hot-dip galvanizing sheet steel.
Background technology
Along with the development of automobile industry, the cold-rolled steel sheet demand for the high intensity required on body of a motor car and high mouldability is increasing, and relevant technical research also gets more and more.It is such as 200710048926.8 in Chinese Patent Application No., name is called in the patent documentation of " production method of deep drawing skin-passed hot-dip galvanizing sheet steel ", disclose instant component and percentage by weight is: C:0.003~0.006%,: 0.02~0.04%, hot-rolling coiling temperature 70~780 DEG C, cold rolled annealed temperature 780~880 DEG C.Finished product about yield strength 180MPa, about tensile strength 310MPa, percentage elongation about 42.0%, n is about 0.21, and r is about 1.9.It is such as 201210338992.X in Chinese Patent Application No. again, name is called in the patent documentation of " a kind of automobile hot-dip galvanizing sheet steel and production method thereof ", disclose automobile hot-dip galvanizing sheet steel component and percentage by weight be C:0.001~0.003%, Si :≤0.03%, Mn:0.05~0.15%, P :≤0.02%, S:0.008~0.015%, Als:0.02~0.07%, Ti:0.05~0.09%, B:0.0002~0.01%.All the other are by Fe.Finished product about yield strength 160MPa, about tensile strength 287MPa, percentage elongation about 44.0%, r90Value about 2.4, n90Value 0.24.
Summary of the invention
It is an object of the invention to provide a kind of cost is low, process implementing difficulty is little, can manufacture Thin Specs hot-dip galvanizing sheet steel and production method thereof.
In order to reach above-mentioned technique effect, the present invention takes techniques below scheme:
A kind of Thin Specs hot-dip galvanizing sheet steel, described Thin Specs hot-dip galvanizing sheet steel includes the constituent of following percentage by weight: C:0.0010%~0.003%, Si:0.01~0.03%, Mn:0.10~0.16%, P :≤0.010%, S :≤0.009%, Als:0.010~0.050%, Ti:0.04%~0.07%, Nb:0.005%~0.02%;Surplus is Fe and inevitable impurity.
The invention also discloses the production method of described Thin Specs hot-dip galvanizing sheet steel, specifically include:
Desulfurizing iron routinely, converter smelting, LF stove Ca process, the step of RH decarburization, control molten steel composition in foregoing scope, through being casting continuously to form the thick continuous casting billet of 200mm, hot rolling heating carries out roughing to 1200 DEG C~1240 DEG C, after roughing, intermediate slab thickness is at 33mm~36mm, adopts mandrelless transform Coil Box to batch;Hot rolling finishing temperature ranges for 900 DEG C~930 DEG C;It is cooled to 770~800 DEG C with the cooling rate of 20~30 DEG C/s after finish rolling batch.In conjunction with the ability of cold-rolling mill, cold rolling reduction ratio is defined as 80%~85%.Then passing through matting, remove belt steel surface Residual oil, iron scale, iron powder etc., enter continuous annealing furnace, annealing soak temperature is 820~850 DEG C, and soaking time is 40~70s, and it is 450~470 DEG C that substrate enters zinc pot temperature.Then passing through air knife to purge, cool down, finishing elongation control is 0.4~0.7%, and straightening elongation percentage all controls in 0.1~0.4% scope, carries out surface passivating treatment subsequently and batches, namely obtaining Thin Specs hot-dip galvanizing sheet steel.
Herein described Thin Specs hot-dip galvanizing sheet steel, refers to the thickness hot-dip galvanizing sheet steel at 0.5mm.
The present invention compared with prior art, has following beneficial effect:
Thin Specs hot-dip galvanizing sheet steel prepared by the present invention, finished product mechanical property reaches yield strength 120~160MPa, tensile strength 270~310MPa, percentage elongation >=46.0%, r90>=2.6, n90The requirement of >=0.26.It addition, the present invention defines a kind of continuous annealing produces the key technology of Thin Specs hot-dip galvanizing sheet steel, present component design is simple, technology controlling and process window is big and adaptability is relatively strong, and product surface quality is excellent.
Accompanying drawing explanation
The microscopic structure of Thin Specs hot-dip galvanizing sheet steel prepared by Fig. 1 present invention.
Detailed description of the invention
Below in conjunction with embodiments of the invention, the invention will be further elaborated.
The present invention presses usual desulfurizing iron, converter smelting, LF stove Ca process, RH decarburization, through being casting continuously to form the thick continuous casting billet of 200mm, the percentage by weight of chemical composition is: C:0.002%, Si:0.02%, Mn:0.12%, P:0.004%, S:0.006%, Als:0.033%, Ti:0.060%, Nb:0.011%;Surplus is Fe and inevitable impurity.Hot rolling heating carries out roughing to 1210 DEG C, intermediate slab thickness 35.0mm after roughing, adopts mandrelless transform Coil Box to batch, and hot rolling finishing temperature is 916 DEG C, is cooled to 772 DEG C with the cooling rate of 25 DEG C/s and batches after finish rolling.Hot rolled thickness 3.0mm.In conjunction with the ability of cold-rolling mill, cold rolling reduction ratio is 83.3%, Cold Rolled Plate Thickness 0.5mm.Then passing through matting, remove belt steel surface Residual oil, iron scale, iron powder etc., enter continuous annealing furnace, annealing soak temperature is 835 DEG C, and soaking time is 58s, and it is 460 DEG C that substrate enters zinc pot temperature.Then pass through air knife purging, cooling, finishing, straightening elongation percentage control, in 0.53% and 0.13% scope, carry out surface passivating treatment subsequently and batch respectively.Finished surface is FC level.Yield strength, tensile strength, percentage elongation, n90、r90Respectively 150MPa, 290MPa, 48.5%, 0.26,2.9.Finished product is that ferrite 100% is organized, grain size 8.0 grades.
The microscopic structure of the Thin Specs hot-dip galvanizing sheet steel that accompanying drawing 1 is prepared for the present invention.It can be seen that Thin Specs hot-dip galvanizing sheet steel prepared by the present invention, it is organized as the ferritic structure of 100%, uniform small grains, and final sum mechanical property is corresponding.
Thin Specs hot-dip galvanizing sheet steel prepared by the present invention, has performance equal with documents under Thin Specs (0.5mm), because at present generally, the correlation performance parameters measured when the hot-dip galvanizing sheet steel military affairs 1mm of production.Simultaneously, it is especially desirable to it is noted that Thin Specs hot-dip galvanizing sheet steel prepared by the application, have the percentage elongation of 48.5%, this is to substantially increase on the basis of documents.
Although reference be made herein to invention has been described for the explanatory embodiment of the present invention, above-described embodiment is only the present invention preferably embodiment, embodiments of the present invention are also not restricted to the described embodiments, should be appreciated that, those skilled in the art can be designed that a lot of other amendments and embodiment, and these amendments and embodiment will drop within spirit disclosed in the present application and spirit.

Claims (2)

1. a Thin Specs hot-dip galvanizing sheet steel, it is characterized in that: described Thin Specs hot-dip galvanizing sheet steel includes the constituent of following percentage by weight: C:0.0010%~0.003%, Si:0.01~0.03%, Mn:0.10~0.16%, P :≤0.010%, S :≤0.009%, Als:0.010~0.050%, Ti:0.04%~0.07%, Nb:0.005%~0.02%;Surplus is Fe and inevitable impurity.
2. the production method of a Thin Specs hot-dip galvanizing sheet steel, it is characterised in that:
According to a conventional method, producing the molten steel with composition described in claim 1, molten steel is through being casting continuously to form the thick continuous casting billet of 200mm, and hot rolling heating carries out roughing to 1200 DEG C~1240 DEG C, and after roughing, intermediate slab thickness is at 33mm~36mm, adopts mandrelless transform Coil Box to batch;
Hot rolling finishing temperature ranges for 900 DEG C~930 DEG C;
It is cooled to 770~800 DEG C with the cooling rate of 20~30 DEG C/s after finish rolling batch;
In conjunction with the ability of cold-rolling mill, cold rolling reduction ratio is defined as 80%~85%;
Then passing through matting, remove belt steel surface Residual oil, iron scale, iron powder, enter continuous annealing furnace, annealing soak temperature is 820~850 DEG C, and soaking time is 40~70s, and it is 450~470 DEG C that substrate enters zinc pot temperature;
Then passing through air knife to purge, cool down, finishing elongation control is 0.4~0.7%, and straightening elongation percentage all controls in 0.1~0.4% scope, carries out surface passivating treatment subsequently and batches, namely obtaining Thin Specs hot-dip galvanizing sheet steel.
CN201610204543.4A 2016-04-01 2016-04-01 A kind of Thin Specs hot-dip galvanizing sheet steel and its production method Active CN105803313B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106929771A (en) * 2017-03-01 2017-07-07 唐山钢铁集团有限责任公司 The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate and preparation method
CN108796363A (en) * 2017-04-27 2018-11-13 宝山钢铁股份有限公司 The great surface quality for adapting to large deformation and punch process covers aluminum substrate steel and its production method
CN110318013A (en) * 2019-07-19 2019-10-11 首钢京唐钢铁联合有限责任公司 A kind of production method of hot-dip galvanized steel strip
CN112143978A (en) * 2020-09-27 2020-12-29 攀钢集团研究院有限公司 Method for manufacturing ultra-low carbon hot-dip galvanized steel sheet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0397813A (en) * 1989-09-11 1991-04-23 Kawasaki Steel Corp Production of cold rolled steel sheet for deep drawing reduced in in-plane anisotropy
CN104120346A (en) * 2014-07-16 2014-10-29 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof, and galvanized steel plate and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0397813A (en) * 1989-09-11 1991-04-23 Kawasaki Steel Corp Production of cold rolled steel sheet for deep drawing reduced in in-plane anisotropy
CN104120346A (en) * 2014-07-16 2014-10-29 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof, and galvanized steel plate and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106929771A (en) * 2017-03-01 2017-07-07 唐山钢铁集团有限责任公司 The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate and preparation method
CN108796363A (en) * 2017-04-27 2018-11-13 宝山钢铁股份有限公司 The great surface quality for adapting to large deformation and punch process covers aluminum substrate steel and its production method
CN110318013A (en) * 2019-07-19 2019-10-11 首钢京唐钢铁联合有限责任公司 A kind of production method of hot-dip galvanized steel strip
CN110318013B (en) * 2019-07-19 2021-07-09 首钢京唐钢铁联合有限责任公司 Production method of hot-dip galvanized strip steel
CN112143978A (en) * 2020-09-27 2020-12-29 攀钢集团研究院有限公司 Method for manufacturing ultra-low carbon hot-dip galvanized steel sheet

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