CN104651715A - Cold-rolled steel plate, preparation method of cold-rolled steel plate, hot-dip galvanized steel plate, and preparation method of hot-dip galvanized steel plate - Google Patents
Cold-rolled steel plate, preparation method of cold-rolled steel plate, hot-dip galvanized steel plate, and preparation method of hot-dip galvanized steel plate Download PDFInfo
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- CN104651715A CN104651715A CN201510063968.3A CN201510063968A CN104651715A CN 104651715 A CN104651715 A CN 104651715A CN 201510063968 A CN201510063968 A CN 201510063968A CN 104651715 A CN104651715 A CN 104651715A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 28
- 229910001335 Galvanized steel Inorganic materials 0.000 title abstract 5
- 239000008397 galvanized steel Substances 0.000 title abstract 5
- 238000005246 galvanizing Methods 0.000 claims abstract description 53
- 238000005098 hot rolling Methods 0.000 claims abstract description 16
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 238000005097 cold rolling Methods 0.000 claims abstract description 13
- 238000002791 soaking Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 47
- 239000010959 steel Substances 0.000 claims description 47
- 238000005096 rolling process Methods 0.000 claims description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 11
- 238000005498 polishing Methods 0.000 claims description 8
- 238000007598 dipping method Methods 0.000 claims description 6
- 238000005482 strain hardening Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 238000002161 passivation Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910000529 magnetic ferrite Inorganic materials 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000003009 desulfurizing Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
Abstract
The invention belongs to the technical field of cold-rolled plate strip production, and particularly relates to a cold-rolled steel plate, a preparation method of the cold-rolled steel plate, a hot-dip galvanized steel plate and a preparation method of the hot-dip galvanized steel plate. The preparation method of the cold-rolled steel plate comprises the steps that a plate slab is subjected to hot rolling, reeling, cold rolling and annealing sequentially, wherein an intermediate plate slab obtained after the hot rolling is cooled at a cooling rate of 75-90 DEG C/s to the reeling temperature of 770-800 DEG C; a reduction ratio of the cold rolling is 75-85%; and the annealing conditions include that the soaking temperature is 830-860 DEG C and the soaking time is 40-70s. The preparation methods have low implementation difficulty and low production cost, and the hot-dip galvanized steel plate with high processability and surface quality can be produced in a continuous hot dip galvanizing production line stably and in batches.
Description
Technical field
The invention belongs to cold rolled sheet production technical field, particularly relate to a kind of cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof.
Background technology
Along with the development of automobile industry, the high strength required in vehicle body and high formability cold-rolled steel sheet, the representativeness profit of continuous annealing producing shaped excellent property has following 2:
The production method of (1) 200710048926.8 deep drawing skin-passed hot-dip galvanizing sheet steel
Instant component and weight percent are: C:0.003 ~ 0.006%, Ti-3.4N-4C-1.5S: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, elongation about 42.0%,
about 0.21,
about 1.9.
(2) 201210338992.X automobile hot-dip galvanizing sheet steel and production method thereof
Instant component and weight percent are 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 280MPa, elongation about 44.0%, r90 value about 2.4, n90 value 0.24.
But aforesaid method can not obtain the hot-dip galvanizing sheet steel that intensity and forming property have concurrently, and cost is higher.
Summary of the invention
The invention provides a kind of preparation method of cold-rolled steel sheet, the mechanical property of the hot-dip galvanizing sheet steel utilizing the method gained steel plate to obtain meets yield strength 120 ~ 160MPa, tensile strength 280 ~ 320MPa, elongation>=46.0%, plastic strain ratio r
90>=2.6, work hardening exponent n
90the requirement of>=0.26; Thus meet there is some strength and can stamping forming requirement being carried out of market.
Technical scheme of the present invention:
First technical problem that the present invention will solve is to provide a kind of preparation method of cold-rolled steel sheet, and the method comprises: by slab successively through hot rolling, batch, cold rolling and annealing, wherein:
With the rate of cooling of 75 ~ 90 DEG C/s, the intermediate slab obtained after hot rolling is cooled to the temperature of batching after hot rolling;
Described coiling temperature is 770 ~ 800 DEG C;
Described cold rolling draft is 75 ~ 85%;
Described annealing conditions is for comprising: soaking temperature is 830 ~ 860 DEG C, soaking time 40 ~ 70s;
Described slab consist of C:0.001% ~ 0.004%, Si:0.01 ~ 0.03%, Mn:0.04% ~ 0.2%, P :≤0.015%, S :≤0.015%, Als:0.01 ~ 0.05%, Ti:0.06% ~ 0.1%; Surplus is Fe and inevitable impurity.
Preferably, described hot rolling comprises roughing and finish rolling, and the start rolling temperature of described roughing is 1190 DEG C ~ 1220 DEG C, and the finishing temperature of described roughing is 1085-1110 DEG C; The start rolling temperature of described finish rolling is 1035-1065 DEG C, and the finishing temperature of described finish rolling is 910 DEG C ~ 930 DEG C.
Preferably, the thickness of the intermediate slab after described roughing is 33mm ~ 36mm.
Second technical problem that the present invention will solve is to provide a kind of cold-rolled steel sheet, and it is obtained by the preparation method of above-mentioned cold-rolled steel sheet.
The 3rd technical problem that the present invention will solve is to provide a kind of preparation method of hot-dip galvanizing sheet steel, and it adheres to upper zinc coating by above-mentioned cold-rolled steel sheet through galvanizing.
Preferably, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, galvanizing adopts continous way hot dipping to cross method, and the condition of galvanizing is: zinc pot temperature 450 ~ 470 DEG C.
Preferably, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the steel plate after galvanizing is purged, polishing and straightening and passivation; Wherein, polishing unit elongation is 0.1-0.5%.
The 4th technical problem that the present invention will solve is to provide a kind of hot-dip galvanizing sheet steel, and it is obtained by the preparation method of above-mentioned hot-dip galvanizing sheet steel.
Further, the yield strength 120 ~ 160MPa of described hot-dip galvanizing sheet steel, tensile strength 280 ~ 320MPa, elongation after fracture>=46.0%, plastic strain ratio r
90>=2.6, work hardening exponent n
90>=0.26.
The microstructure of described hot-dip galvanizing sheet steel be 100% ferritic structure, ferrite grain size be more than 8.5 grades.
Beneficial effect of the present invention:
(1) the present invention defines a kind of method that hot-dip galvanizing sheet steel is produced in continuous annealing.
(2) present component simplicity of design, technology controlling and process window is large and adaptability is comparatively strong, product surface quality is excellent.
It is little that method of the present invention implements difficulty, and production cost is low, can stablize the high-mouldability energy of batch production, the hot-dip galvanizing sheet steel of great surface quality in Continuous Hot Dip Galvanizing Line.Gained finished product mechanical property of the present invention meets yield strength 120 ~ 160MPa, tensile strength 280 ~ 320MPa, elongation>=46.0%, plastic strain ratio r
90>=2.6, work hardening exponent n
90the requirement of>=0.26; What meet market has some strength and can carry out stamping forming requirement.The ferritic structure that gained hot-dip galvanizing sheet steel surface quality characteristics of the present invention is more than FB level, microstructure is 100%, ferrite grain size are more than 8.5 grades.
Accompanying drawing explanation
Fig. 1 is the micro-organization chart of embodiment 1 gained finished product; As shown in Figure 1, the microstructure of gained hot-dip galvanizing sheet steel of the present invention is ferritic structure, the ferrite grain size of 100% is more than 8.5 grades.
Embodiment
First technical problem that the present invention will solve is to provide a kind of preparation method of cold-rolled steel sheet, and the method comprises: by slab successively through hot rolling, batch, cold rolling and annealing, wherein:
With the rate of cooling of 75 ~ 90 DEG C/s, the intermediate slab obtained after hot rolling is cooled to the temperature of batching after hot rolling;
Described coiling temperature is 770 ~ 800 DEG C;
Described cold rolling draft is 75 ~ 85%;
Described annealing conditions is for comprising: soaking temperature is 830 ~ 860 DEG C, soaking time 40 ~ 70s;
Described slab consist of C:0.001% ~ 0.004%, Si:0.01 ~ 0.03%, Mn:0.04% ~ 0.2%, P :≤0.015%, S :≤0.015%, Als:0.01 ~ 0.05%, Ti:0.06% ~ 0.1%; Surplus is Fe and inevitable impurity.
In the present invention, described slab can adopt the known method preparing continuously cast bloom of this area to be prepared, such as can by obtaining described continuously cast bloom after blast furnace ironmaking, hot metal pretreatment, converter smelting, steel ladle deoxidation, alloying furnace rear refining, LF electrically heated, RH vacuum-treat and sheet billet continuous casting; Its condition specifically prepared is well known in the art.
Second technical problem that the present invention will solve is to provide a kind of cold-rolled steel sheet, and it is obtained by the preparation method of above-mentioned cold-rolled steel sheet.
The 3rd technical problem that the present invention will solve is to provide a kind of preparation method of hot-dip galvanizing sheet steel, and it adheres to upper zinc coating by above-mentioned cold-rolled steel sheet through galvanizing.To the amount of the zinc coating of hot-dip galvanizing sheet steel, there is no particular limitation in the present invention, can adjust according to concrete to the requirement of steel plate galvanized.
Preferably, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, galvanizing adopts continous way hot dipping to cross method, and the condition of galvanizing is: zinc pot temperature 450 ~ 470 DEG C.Galvanizing of the present invention can adopt continous way hot dipping to cross method, also can adopt intermittent type hot dipping method, but in order to boost productivity and lumber recovery, the present invention preferably adopts continous way hot dipping to cross method.The condition of the preferred described galvanizing of the present invention comprises: zinc pot temperature 450 ~ 470 DEG C.The present invention, in order to obtain the more superior hot-dip galvanizing sheet steel of surface quality, preferably cleans the cold-reduced sheet of gained before annealing.Described cleaning can adopt the purging method of the steel plate of this area routine, such as alkali cleaning and bath cleans, its objective is that the greasy dirt in order to remove surface of cold-rolled steel plate, iron scale, iron powder etc. affect the impurity of plate surface quality.
Preferably, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the steel plate after galvanizing is purged, polishing and straightening and passivation; Wherein, polishing unit elongation is 0.1-0.5%.Further, the preparation method of hot-dip galvanizing sheet steel of the present invention also comprises and carries out passivation to gained steel plate, and the present invention preferably adopts chromium-free deactivation; Being not particularly limited the method for described passivation, can be the passivating method of this area routine.
The 4th technical problem that the present invention will solve is to provide a kind of hot-dip galvanizing sheet steel, and it is obtained by the preparation method of above-mentioned hot-dip galvanizing sheet steel.
Further, the yield strength 120 ~ 160MPa of described hot-dip galvanizing sheet steel, tensile strength 280 ~ 320MPa, elongation after fracture>=46.0%, plastic strain ratio r
90>=2.6, work hardening exponent n
90>=0.26.
The present invention prepares the method for pot galvanize: by usual desulfurizing iron, converter smelting, LF stove Ca process, RH decarburization, molten steel composition is controlled in above-mentioned scope, through the continuously cast bloom that continuous casting becomes 200mm thick, hot rolling is heated to 1190 DEG C ~ 1220 DEG C and carries out roughing, after roughing, intermediate slab thickness is at 33mm ~ 36mm, adopts mandrelless transform Coil Box to batch; Hot rolling finishing temperature scope is 910 DEG C ~ 930 DEG C; 770 ~ 800 DEG C are cooled to batch with the cooling rate of 75 ~ 90 DEG C/s after finish rolling.In conjunction with the ability of cold-rolling mill, cold rolling draft is defined as 75% ~ 85%.Subsequently through matting, removing belt steel surface Residual oil, iron scale, iron powder etc., enter continuous annealing furnace, annealing soak temperature is 830 ~ 860 DEG C, and soaking time is 40 ~ 70s, and it is 450 ~ 470 DEG C that substrate enters zinc pot temperature.All control, in 0.1 ~ 0.5% scope, carry out surface passivating treatment subsequently and batch through air knife purging, cooling, straightening unit elongation subsequently.
The present invention is described in detail by the following examples.
In following examples, yield strength R
eL, tensile strength R
m, elongation after fracture A
80testing method carry out according to GBT228-2002 metallic substance tensile testing at ambient temperature; Plastic strain ratio r
90testing method carry out according to the measuring method of GBT5027-2007 metal sheet and strip plastic strain ratio; Work hardening exponent n
90>=testing method carry out according to GBT5028-2008 metal sheet and strip tension strain hardenability value test method; The surface quality characteristics of method to hot-dip galvanizing sheet steel specified in GBT2518-2008 is adopted to judge.
Embodiment 1
The present invention is by usual desulfurizing iron, converter smelting, LF stove Ca process, RH decarburization, the continuously cast bloom becoming 200mm thick through continuous casting is as slab, the weight percent of chemical composition is: C:0.002%, Si:0.02%, Mn:0.12%, P:0.006%, S:0.007%, Als:0.037%, Ti:0.075%; Surplus is Fe and inevitable impurity.
This heating of plate blank to 1208 DEG C is carried out roughing, intermediate slab thickness 35.5mm after roughing, adopt mandrelless transform Coil Box to batch the intermediate slab after roughing, then carry out finish rolling, finish rolling finishing temperature is 915 DEG C, and the thickness of the intermediate slab after finish rolling is 4.0mm; 777 DEG C are cooled to batch with the cooling rate of 81 DEG C/s after finish rolling.In conjunction with the ability of cold-rolling mill, with the cold rolling draft of 80% on cold-rolling mill, be cold-rolled to the Cold Rolled Plate Thickness of 0.8mm.Subsequently by this cold-rolled steel sheet through matting, removing belt steel surface Residual oil, iron scale, iron powder etc., enter continuous annealing furnace, annealing soak temperature is 848 DEG C, and soaking time is 62s, then enters the zinc pot of 465 DEG C.Steel plate purges through air knife after going out zinc pot, cooling, then carries out polishing, straightening (wherein polishing unit elongation controls respectively in 0.50% and 0.2% scope), carries out surface passivating treatment subsequently and batches.
Finished surface is FC level; Finished product yield strength, tensile strength, elongation, n90, r90 are respectively 142MPa, 295MPa, 48.5%, 0.27,3.0.
Embodiment 2-3
The composition percentage ratio of slab is as shown in table 1, and concrete technology condition is as shown in table 2; Additive method is with embodiment 1.Gained finished product mechanical property and microstructure finished surface performance as shown in table 3.
The chemical constitution of table 1 slab
Comparative example 1
The composition percentage ratio of slab is as shown in table 1, and it is not in the composition range that the present invention limits; Concrete technology condition is with embodiment 3; Additive method is with embodiment 1.Gained finished product mechanical property finished surface performance is as shown in table 3.
Comparative example 2-3
The composition percentage ratio of slab is with embodiment 1, as shown in table 1; Concrete technology condition is as shown in table 2, and it is not in the composition range that the present invention limits; Additive method is with embodiment 1.Gained finished product mechanical property finished surface performance is as shown in table 3.
The processing condition of table 2 cold-rolled steel sheet and galvanizing condition
Table 3 embodiment and comparative example gained end properties
Claims (10)
1. the preparation method of cold-rolled steel sheet, the method comprises: by slab successively through hot rolling, batch, cold rolling and annealing, it is characterized in that:
With the rate of cooling of 75 ~ 90 DEG C/s, the intermediate slab obtained after hot rolling is cooled to the temperature of batching after hot rolling;
Described coiling temperature is 770 ~ 800 DEG C;
Described cold rolling draft is 75 ~ 85%;
Described annealing conditions is for comprising: soaking temperature is 830 ~ 860 DEG C, soaking time 40 ~ 70s;
Described slab consist of C:0.001% ~ 0.004%, Si:0.01 ~ 0.03%, Mn:0.04% ~ 0.2%, P :≤0.015%, S :≤0.015%, Als:0.01 ~ 0.05%, Ti:0.06% ~ 0.1%; Surplus is Fe and inevitable impurity.
2. the preparation method of cold-rolled steel sheet according to claim 1, is characterized in that: described hot rolling comprises roughing and finish rolling, and the start rolling temperature of described roughing is 1190 DEG C ~ 1220 DEG C, and the finishing temperature of described roughing is 1085-1110 DEG C; The start rolling temperature of described finish rolling is 1035-1065 DEG C, and the finishing temperature of described finish rolling is 910 DEG C ~ 930 DEG C.
3. the preparation method of cold-rolled steel sheet according to claim 1 and 2, is characterized in that: the thickness of the intermediate slab after described roughing is 33mm ~ 36mm.
4. cold-rolled steel sheet, is characterized in that, it is obtained by the preparation method of the cold-rolled steel sheet described in any one of claims 1 to 3.
5. the preparation method of hot-dip galvanizing sheet steel, its cold-rolled steel sheet is through the upper zinc coating of galvanizing attachment, and described cold-rolled steel sheet is cold-rolled steel sheet according to claim 4, or is obtained by the preparation method described in any one of claims 1 to 3.
6. the preparation method of hot-dip galvanizing sheet steel according to claim 5, is characterized in that, described galvanizing adopts continous way hot dipping to cross method, and the condition of galvanizing is: zinc pot temperature 450 ~ 470 DEG C.
7. the preparation method of the hot-dip galvanizing sheet steel according to claim 5 or 6, is characterized in that, in the preparation method of described hot-dip galvanizing sheet steel, purges the steel plate after galvanizing, polishing and straightening and passivation; Wherein, polishing unit elongation is 0.1 ~ 0.5%.
8. hot-dip galvanizing sheet steel, it is obtained by the preparation method described in any one of claim 5 ~ 7.
9. hot-dip galvanizing sheet steel according to claim 8, is characterized in that, the yield strength of described hot-dip galvanizing sheet steel is 120 ~ 160MPa, tensile strength 280 ~ 320MPa, elongation after fracture>=46.0%, plastic strain ratio r
90>=2.6, work hardening exponent n
90>=0.26.
10. hot-dip galvanizing sheet steel according to claim 8 or claim 9, is characterized in that, the microstructure of described hot-dip galvanizing sheet steel be 100% ferritic structure, ferrite grain size be more than 8.5 grades.
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| CN201510063968.3A CN104651715A (en) | 2015-02-06 | 2015-02-06 | Cold-rolled steel plate, preparation method of cold-rolled steel plate, hot-dip galvanized steel plate, and preparation method of hot-dip galvanized steel plate |
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| CN201510063968.3A CN104651715A (en) | 2015-02-06 | 2015-02-06 | Cold-rolled steel plate, preparation method of cold-rolled steel plate, hot-dip galvanized steel plate, and preparation method of hot-dip galvanized steel plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862026A (en) * | 2016-04-19 | 2016-08-17 | 海安县晋全电工器材有限公司 | Copper medal galvanization production line |
| CN108588491A (en) * | 2018-06-05 | 2018-09-28 | 马鞍山钢铁股份有限公司 | A kind of hot dip galvanizing-Al-Mg clad steel sheets that immersion plating is excellent and production method |
| 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 |
| CN115386806A (en) * | 2022-09-13 | 2022-11-25 | 攀钢集团研究院有限公司 | Production method of hot-dip galvanized steel sheet suitable for high-speed continuous stamping and hot-dip galvanized steel sheet |
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| CN104120345A (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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105862026A (en) * | 2016-04-19 | 2016-08-17 | 海安县晋全电工器材有限公司 | Copper medal galvanization production line |
| CN108588491A (en) * | 2018-06-05 | 2018-09-28 | 马鞍山钢铁股份有限公司 | A kind of hot dip galvanizing-Al-Mg clad steel sheets that immersion plating is excellent and production method |
| 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 |
| CN115386806A (en) * | 2022-09-13 | 2022-11-25 | 攀钢集团研究院有限公司 | Production method of hot-dip galvanized steel sheet suitable for high-speed continuous stamping and hot-dip galvanized steel sheet |
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