CN105803313B - A kind of Thin Specs hot-dip galvanizing sheet steel and its production method - Google Patents

A kind of Thin Specs hot-dip galvanizing sheet steel and its production method Download PDF

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Publication number
CN105803313B
CN105803313B CN201610204543.4A CN201610204543A CN105803313B CN 105803313 B CN105803313 B CN 105803313B CN 201610204543 A CN201610204543 A CN 201610204543A CN 105803313 B CN105803313 B CN 105803313B
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Prior art keywords
hot
dip galvanizing
sheet steel
galvanizing sheet
thin specs
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CN105803313A (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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    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Coating With Molten Metal (AREA)

Abstract

The invention discloses a kind of Thin Specs hot-dip galvanizing sheet steel, include 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 the Thin Specs hot-dip galvanizing sheet steel.The present invention forms the key technology that a kind of continuous annealing produces Thin Specs hot-dip galvanizing sheet steel, and present component design is simple, technology controlling and process window is big and adaptability is stronger, and product surface quality is excellent.

Description

A kind of Thin Specs hot-dip galvanizing sheet steel and its production method
Technical field
The present invention relates to one kind, the invention belongs to cold rolled sheet production technical field, more particularly to a kind of continuous annealing life A kind of production method of Thin Specs hot-dip galvanizing sheet steel is produced, the invention further relates to the Thin Specs hot-dip galvanizing sheet steel.
Background technology
With the development of automobile industry, needed for the cold-rolled steel sheet of the high intensity that is required on body of a motor car and high mouldability Ask increasing, related technical research is also more and more.It is 200710048926.8, title such as in Chinese Patent Application No. In patent document for " 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%, 70~780 DEG C of hot-rolling coiling temperature, cold rolled annealed 780~880 DEG C of temperature. Finished product yield strength 180MPa or so, tensile strength 310MPa or so, elongation 42.0% or so, n is in 0.21 or so, r 1.9 Left and right.It is again 201210338992.X, entitled " a kind of automobile hot-dip galvanizing sheet steel and its life such as in Chinese Patent Application No. In the patent document of production method ", it is C to disclose automobile with hot-dip galvanizing sheet steel component and percentage by weight：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%.Remaining is by Fe.Finished product yield strength 160MPa or so, tensile strength 287MPa Left and right, elongation 44.0% or so, r90Value 2.4 or so, n90Value 0.24.
The content of the invention
It is an object of the invention to provide the Thin Specs galvanizing that a kind of cost is low, process implementing difficulty is small, can manufacture Steel plate and its production method.
In order to reach above-mentioned technique effect, the present invention takes following technical scheme：
A kind of Thin Specs hot-dip galvanizing sheet steel, the composition of the Thin Specs hot-dip galvanizing sheet steel including following percentage by weight into Point：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 for Fe and not Impurity can be avoided.
The invention also discloses the production method of the Thin Specs hot-dip galvanizing sheet steel, specifically include：
The step of desulfurizing iron routinely, converter smelting, LF stove Ca processing, RH decarburizations, control molten steel composition is above In described scope, the continuous casting billet thick through being casting continuously to form 200mm, hot rolling is heated to 1200 DEG C~1240 DEG C progress roughing, after roughing Intermediate slab thickness is batched in 33mm~36mm using mandrelless transform Coil Box；Hot rolling finishing temperature scope is 900 DEG C~930 ℃；770~800 DEG C are cooled to after finish rolling with 20~30 DEG C/s cooling rate to be batched.With reference to the ability of cold-rolling mill, under cold rolling Rate is defined as 80%~85%.Then pass through matting, remove belt steel surface Residual oil, iron scale, iron powder etc., into continuous Annealing furnace, annealing soak temperature is 820~850 DEG C, and soaking time is 40~70s, and substrate enters zinc pot temperature for 450~470 DEG C. Air knife purging, cooling are then passed through, finishing elongation control is 0.4~0.7%, and straightening elongation percentage is all controlled 0.1~0.4% In the range of, then carry out surface passivating treatment and batch, that is, obtain Thin Specs hot-dip galvanizing sheet steel.
Herein described Thin Specs hot-dip galvanizing sheet steel, refers to hot-dip galvanizing sheet steel of the thickness in 0.5mm.
The present invention compared with prior art, with following beneficial effect：
Thin Specs hot-dip galvanizing sheet steel prepared by the present invention, finished product mechanical property reaches 120~160MPa of yield strength, and tension is strong Spend 270~310MPa, elongation >=46.0%, r90>=2.6, n90>=0.26 requirement.In addition, the present invention forms a kind of connect The key technology of continuous annealing production Thin Specs hot-dip galvanizing sheet steel, present component design is simple, technology controlling and process window is big and adapts to Property is stronger, and product surface quality is excellent.
Brief description of the drawings
The microscopic structure of Thin Specs hot-dip galvanizing sheet steel prepared by Fig. 1 present invention.
Embodiment
With reference to embodiments of the invention, the invention will be further elaborated.
The present invention presses usual desulfurizing iron, converter smelting, LF stove Ca processing, RH decarburizations, the continuous casting thick through being casting continuously to form 200mm Base, 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 is heated to 1210 DEG C of progress Intermediate slab thickness 35.0mm after roughing, roughing, is batched using mandrelless transform Coil Box, and hot rolling finishing temperature is 916 DEG C, finish rolling 772 DEG C are cooled to afterwards with 25 DEG C/s cooling rate to be batched.Hot rolled thickness 3.0mm.With reference to the ability of cold-rolling mill, cold rolling reduction ratio For 83.3%, Cold Rolled Plate Thickness 0.5mm.Matting is then passed through, belt steel surface Residual oil, iron scale, iron powder etc. is removed, enters Enter continuous annealing furnace, annealing soak temperature is 835 DEG C, soaking time is 58s, substrate enters zinc pot temperature for 460 DEG C.Then pass through Air knife purging, cooling, finishing, straightening elongation percentage are controlled in the range of 0.53% and 0.13% respectively, then carry out surface passivation Handle and batch.Finished surface is FC grades.Yield strength, tensile strength, elongation, n90、r90Respectively 150MPa, 290MPa, 48.5%th, 0.26,2.9.Finished product is that ferrite 100% is organized, 8.0 grades of grain size.
The microscopic structure for the Thin Specs hot-dip galvanizing sheet steel that accompanying drawing 1 is prepared for the present invention.As can be seen that the present invention prepare it is thin Specification hot-dip galvanizing sheet steel, it is organized as 100% ferritic structure, and uniform small grains are final corresponding with mechanical property.
Thin Specs hot-dip galvanizing sheet steel prepared by the present invention, has equally matched with documents under Thin Specs (0.5mm) Performance because at present generally, the correlation performance parameters determined under the conditions of 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, with 48.5% elongation, this be Substantially increased on the basis of documents.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair Bright preferably embodiment, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art Member can be designed that a lot of other modification and embodiment, and these modifications and embodiment will fall in principle disclosed in the present application Within scope and spirit.

Claims (1)

1. a kind of production method of Thin Specs hot-dip galvanizing sheet steel, it is characterised in that：
By usual desulfurizing iron, converter smelting, LF stove Ca processing, RH decarburizations, the continuous casting billet thick through being casting continuously to form 200mm, chemistry into Point percentage by weight be：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 is heated to 1210 DEG C and carried out slightly Roll, intermediate slab thickness 35.0mm after roughing is batched using mandrelless transform Coil Box, hot rolling finishing temperature is 916 DEG C, after finish rolling 772 DEG C are cooled to 25 DEG C/s cooling rate to be batched；Hot rolled thickness 3.0mm；With reference to the ability of cold-rolling mill, cold rolling reduction ratio is 83.3%, Cold Rolled Plate Thickness 0.5mm；Matting is then passed through, belt steel surface Residual oil, iron scale, iron powder etc. is removed, entered Continuous annealing furnace, annealing soak temperature is 835 DEG C, and soaking time is 58s, and substrate enters zinc pot temperature for 460 DEG C；Then pass through gas Knife purging, cooling, finishing, straightening elongation percentage are controlled in the range of 0.53% and 0.13% respectively, are then carried out at surface passivation Manage and batch；Finished surface is FC grades；Yield strength, tensile strength, elongation, n90、r90Respectively 150MPa, 290MPa, 48.5%th, 0.26,2.9；Finished product is that ferrite 100% is organized, 8.0 grades of grain size.
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CN106929771B (en) * 2017-03-01 2019-05-28 唐山钢铁集团有限责任公司 The high-strength galvanized steel of 1000MPa grades of two-phases and steel plate and preparation method
CN108796363B (en) * 2017-04-27 2020-10-27 宝山钢铁股份有限公司 High-surface-quality aluminum-coated substrate steel suitable for large deformation and stamping and production method thereof
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
CN115491570A (en) * 2022-09-21 2022-12-20 攀钢集团研究院有限公司 Production method of thick ultra-deep drawing hot-dip galvanized steel plate

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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

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JPH07110976B2 (en) * 1989-09-11 1995-11-29 川崎製鉄株式会社 Manufacturing method of cold-rolled steel sheet for deep drawing with small in-plane anisotropy

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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

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