CN109435362A - A kind of resistant to rust cold-rolled steel sheet and its manufacturing method - Google Patents
A kind of resistant to rust cold-rolled steel sheet and its manufacturing method Download PDFInfo
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- CN109435362A CN109435362A CN201811114194.2A CN201811114194A CN109435362A CN 109435362 A CN109435362 A CN 109435362A CN 201811114194 A CN201811114194 A CN 201811114194A CN 109435362 A CN109435362 A CN 109435362A
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- plate ontology
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 118
- 239000010959 steel Substances 0.000 claims abstract description 118
- 239000011572 manganese Substances 0.000 claims abstract description 108
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 63
- 239000011651 chromium Substances 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 21
- 238000005275 alloying Methods 0.000 claims description 20
- 238000005097 cold rolling Methods 0.000 claims description 14
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 34
- 230000000694 effects Effects 0.000 abstract description 9
- 230000000704 physical effect Effects 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 27
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000001540 jet deposition Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 oxonium ion Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
Abstract
A kind of resistant to rust cold-rolled steel sheet provided in an embodiment of the present invention and its manufacturing method, comprising: steel plate ontology and alloy-layer, the alloy-layer are covered on the surface of the steel plate ontology；The degree thickness of the alloy-layer is more than or equal to 0.5* (Mneq)0.5Micron, the range of the standard electrode potential of the alloy-layer are -0.8V-0V, and the manganese equivalent of the steel plate ontology is 1%-6%, and the manganese equivalent is according to Mneq=10*C%+Mn%+0.5*Cr% is obtained, wherein MneqFor the manganese equivalent in the steel plate ontology, C% is the carbon content in the steel plate ontology, and Mn% is the manganese content in the steel plate ontology, and Cr% is the chromium content in the steel plate ontology.The present invention does not increase in the physical property for not influencing steel plate ontology and has reached good anti-corrosion effect in the case of subsequent use program volume.
Description
Technical field
The present invention relates to technical field of metal material, in particular to a kind of resistant to rust cold-rolled steel sheet and its manufacturer
Method.
Background technique
Cold rolling high strength steel plate is widely used in the vehicle body production of automobile.In order to obtain good intensity and toughness, cold rolling is high
Generally contain more alloying element, such as carbon, manganese, silicon, aluminium, chromium in strong steel plate.Since the alloying element in high strength steel plate contains
Measure it is higher, cause the corrosion resistance of cold rolling high strength steel plate to be in an atmosphere remarkably decreased, transport, storage in and car body coating
It is preceding it occur frequently that surface corrosion.
Currently, there are many method for solving cold rolling high strength steel plate surface corrosion.For example, can be applied on cold rolling high strength steel plate surface
Antirust oil is covered, antirust oil has good corrosion resistance, but high strength steel plate needs to carry out before use oil removal treatment, increases
Manufacturing procedure.It can also add trace alloying element, such as Ni, Cu in cold rolling high strength steel plate, realize resistant to rust, however this
A little trace alloying elements usually adversely affect its intensity and toughness.The packaging that favorable sealing property can also be used, is reduced
The contact of cold rolling high strength steel plate and oxidisability atmosphere, but on the one hand the program increases packing cost, on the other hand in cold rolling
Steel plate can not be avoided to contact in the use process of high strength steel plate with the direct of air completely.To sum up, the anti-corrosion of the prior art
The process and cost that method will increase subsequent storage and transportation, use, or even plate quality is influenced, Given this propose the present invention.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of resistant to rust cold-rolled steel sheet and its manufacturing method, and the present invention can be
Do not increase subsequent storage and transportation, in the case where the process and cost that use, improves the rustless property of steel plate ontology, solve cold-rolled steel
The corrosion problem of plate.
The embodiment of the present invention is achieved in that
A kind of resistant to rust cold-rolled steel sheet, comprising: steel plate ontology and alloy-layer, the alloy-layer are covered on the steel plate ontology
Surface；The degree thickness of the alloy-layer is more than or equal to 0.5* (Mneq)0.5Micron, the model of the standard electrode potential of the alloy-layer
It encloses for -0.8V-0V, the manganese equivalent of the steel plate ontology is 1%-6%, and the manganese equivalent is according to Mneq=10*C%+Mn%+
0.5*Cr% is obtained, wherein MneqFor the manganese equivalent in the steel plate ontology, C% is the carbon content in the steel plate ontology,
Mn% is the manganese content in the steel plate ontology, and Cr% is the chromium content in the steel plate ontology.
Preferably, the manganese equivalent is 3%-4%.
Preferably, the thickness of the alloy-layer is less than or equal to 2.5 microns.
Preferably, the alloy layer thickness is 2 microns.
Preferably, the space structure of the alloy-layer are as follows: column structure, layer structure, mono-crystalline structures or isometric crystal structure.
A kind of manufacturing method of resistant to rust cold-rolled steel sheet, for producing above-mentioned resistant to rust cold-rolled steel sheet, which is characterized in that
The described method includes: smelting steel billet, the alloying element content in steel billet is controlled；Steel billet is successively heated, roughing, finish rolling,
Cooling, obtains steel plate ontology at cold rolling；The steel plate ontology is successively surface-treated, is heat-treated and is batched, is obtained described anti-
Corrode cold-rolled steel sheet；Wherein, controlling the alloying element content in the steel billet makes the manganese equivalent of the steel plate ontology be 1%-
6%, the manganese equivalent is according to Mneq=10*C%+Mn%+0.5*Cr% is obtained, wherein MneqFor the manganese in the steel plate ontology
Equivalent, C% are the carbon content in the steel plate ontology, and Mn% is the manganese content in the steel plate ontology, and Cr% is the steel plate
Chromium content in ontology；The surface treatment is the surface cladding thickness in the steel plate ontology more than or equal to 0.5* (Mneq)0.5
Micron, and the standard electrode potential of alloy-layer is -0.8V-0V.
Preferably, the alloying element content in the control steel billet makes the manganese equivalent of the steel plate ontology be 3%-4%.
Preferably, the thickness of the alloy-layer is less than or equal to 2.5 microns.
Preferably, the thickness of the alloy-layer is less than or equal to 2 microns.
Preferably, the space structure of the alloy-layer are as follows: column structure, layer structure, mono-crystalline structures or isometric crystal structure.
Compared with prior art, a kind of resistant to rust cold-rolled steel sheet provided in an embodiment of the present invention and its manufacturing method, this is anti-
Corrosion cold-rolled steel sheet includes steel plate ontology and the alloy-layer for being covered in steel plate body surface, it is of the invention according to the carbon of steel plate ontology
Content and manganese content determine the manganese equivalent of the steel plate ontology, and the alloy layer thickness being arranged is related to manganese equivalent.Control manganese is worked as
Amount is 1%-6%, and the height of manganese equivalent can directly reflect the degree that galvanic interaction occurs of steel plate ontology, in the present invention
The thickness minimum value of alloy-layer is determined according to manganese equivalent.Guarantee that the thickness of alloy-layer is more than or equal to 0.5* (Mn simultaneouslyeq)0.5
Micron, and the range of standard electrode potential is -0.8V-0V, is had after finally making steel plate ontology be capped alloy-layer good
Resistant to rust effect.Therefore, resistant to rust cold-rolled steel sheet of the invention is the process and cost for not increasing subsequent storage and transportation, using the case where
Under, there is good rustless property.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is that a kind of resistant to rust cold-rolled steel sheet that first embodiment of the invention provides corrodes theory structure schematic diagram.
Fig. 2 is a kind of resistant to rust cold-rolled steel sheet first kind structural schematic diagram that first embodiment of the invention provides.
Fig. 3 is a kind of the second class formation of resistant to rust cold-rolled steel sheet schematic diagram that first embodiment of the invention provides.
Fig. 4 is a kind of resistant to rust cold-rolled steel sheet third class formation schematic diagram that first embodiment of the invention provides.
Fig. 5 is a kind of the 4th class formation schematic diagram of resistant to rust cold-rolled steel sheet that first embodiment of the invention provides.
Fig. 6 is a kind of surface treatment process of the manufacturing method for resistant to rust cold-rolled steel sheet that fourth embodiment of the invention provides
Figure.
Icon: 10- resistant to rust cold-rolled steel sheet；10a- resistant to rust cold-rolled steel sheet；10b- resistant to rust cold-rolled steel sheet；10c- rust-proofing
Lose cold-rolled steel sheet；10d- resistant to rust cold-rolled steel sheet；11- alloy-layer；12- steel plate ontology；13- alloying element abundance zone.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In existing cold rolling high-strength steel, usually all contain more alloying element, such as carbon, manganese, silicon, aluminium, chromium.Its
In, than more typical alloying element content range: carbon content is 0.05~0.3%, and manganese content is 0.5~2.5%, and silicone content is
0.1~2%, aluminium content is 0.05~1%, and chromium content is 0.05~0.5%.Cold rolling high-strength steel is by the warm of heating and cooling
After reason, main microstructure includes martensite, ferrite, austenite, bainite etc..Above-mentioned alloying element is in heat treatment process
In can largely be gathered in the high-strength steel surface of cold rolling, form the alloying element abundance zone 13 of selective segregation, as shown in Figure 1.These
The alloying element of surface aggregation is easy and iron matrix will form microcosmic primary battery in atmospheric environment, accelerates the corrosion speed of steel
Degree, alloy-layer 11 of the invention can weaken or prevent the galvanic interaction on steel plate ontology 12.In addition, the height of carbon content is right
The corrosion of steel has biggish positive correlation to act on, and discovery combines alloying element carbon, manganese, chromium to carry out comprehensively considering energy in the present invention
More accurate corrosion relationship is accessed, and determines the Rational Thickness of outer layer alloys layer 11.
First embodiment
Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are please referred to, a kind of resistant to rust cold-rolled steel sheet 10 provided in the present embodiment, comprising: steel plate
Ontology 12 and alloy-layer 11, the alloy-layer 11 are covered on the surface of the steel plate ontology 12.It should be noted that in the present invention
The shape of steel plate, the apparent parameters such as size are with no restriction.
Preferably, wherein the structure of alloy-layer 11 should want compact, should not be excessively loose, prevent from influencing alloy-layer 11 and steel
The resistant to rust effect of plate ontology 12.Specific structure may is that the resistant to rust cold-rolled steel sheet 10a of column structure as shown in Figure 2,
The resistant to rust cold-rolled steel sheet 10c of the resistant to rust cold-rolled steel sheet 10b of layer structure as shown in Figure 3, mono-crystalline structures as shown in Figure 4
Or the resistant to rust cold-rolled steel sheet 10d of isometric crystal structure as shown in Figure 5.
Since carbon, manganese, chromium have larger impact to corrosion rate in steel plate ontology 12, closed when being covered on 12 surface of steel plate ontology
After layer gold 11, by the research to carbon, manganese, chromium content and corrosion rate in steel plate ontology 12 in the present embodiment, and carry out
Fitting determines, when the thickness of the alloy-layer 11 is more than or equal to 0.5* (Mneq)0.5Micron, MneqFor manganese equivalent；The steel plate sheet
The determination factor of manganese equivalent includes in body 12, the manganese content in carbon content, the steel plate ontology 12 in the steel plate ontology 12
With the chromium content in the steel plate ontology 12.
In the present embodiment according to corrosion rate and alloying element content, the calculating for the manganese equivalent calculated through over-fitting
Formula can are as follows: Mneq=10*C%+Mn%+0.5*Cr%, wherein MneqFor manganese equivalent, C% is the carbon content in steel plate ontology 12,
Mn% is the manganese content in steel plate ontology 12, and Cr% is the chromium content in steel plate ontology 12.It should be noted that wherein weight system
Number 10,1,0.5 allows to have reasonable calculating error (for example, error is in ± 0.1 range).By to above-mentioned in the present embodiment
11 thickness of alloy-layer carry out corrosion experiment, wherein C is column structure, L is layered structure, S is mono-crystalline structures, E equiax crystal knot
Any one in above structure can be used in structure, the alloy-layer 11 in the present embodiment.Corrosion resistance is evaluated using wet heating, it is wet
Hydrothermal condition are as follows: temperature is 50 DEG C, relative humidity 90%.48 hours damp heat tests are carried out, is then evaluated and is occurred with visual method
The area of red rust, if it exceeds 3% is obvious corrosion.
Table 1
The steel plate of serial number 1-14 group as can be seen from Table 1, the steel plate compared to the 15th group have apparent resistant to rust effect,
Its manganese equivalent is between 1%-6%.
The steel plate of serial number 1-11 group is all larger than 0.5* (Mn due to the thickness of alloy-layer 11 as can be seen from Table 1eq)0.5Micron,
(now more conventional alloying element content when no matter individual carbon content and manganese content or manganese content change in normal ranges
Range are as follows: carbon content be 0.05~0.3%, manganese content be 0.5~2.5%, silicone content be 0.1~2%, aluminium content be 0.05~
1%, chromium content is 0.05~0.5%.) or 11 structure of alloy-layer variation, corresponding to corrosion area be respectively less than be equal to
2%, it is not more than 3%, it can thus be assumed that being not apparent from corrosion, there is good anti-corrosion ability；In other 10th group, due to 0.5*
(Mneq)0.5=0.79 micron, alloy-layer 11 is with a thickness of 0.8 micron, since there are reasonable errors with calculating for measurement, it is believed that the group
Middle 0.5* (Mneq)0.5(i.e. error is ± 0.01) equal with 11 thickness of alloy-layer.
And the group of serial number 12-15, since 11 thickness of alloy-layer is less than 0.5* (Mneq)0.5Or even not set alloy-layer
11, the corrosion area of steel plate has reached 20%-90%, does not have anti-corrosion ability substantially.
In the present embodiment moreover, although the alloy-layer 11 covered on the surface of steel plate ontology 12 needs to have
Standby certain thickness, and this thickness usually should have positive correlation with manganese equivalent.But 11 thickness of alloy-layer can not be unlimited
It thickens, otherwise will affect the mechanical properties and the service performances such as automobile body welding coating, cause solder joint current window to reduce, toughness
Decline etc..It is common, using (i.e. after covering alloy layer 11), the elongation percentage decline of sample should be no no more than 2% after surface treatment
Service performance will then be significantly affected.It is obtained after carrying out elongation percentage test to steel plate ontology 12:
Table 2
The relationship that the thickness of alloy-layer 11 and elongation percentage are positively correlated as can be seen from Table 2, and be in reverse phase with corrosion area
Pass relationship, elongation percentage is 2% when alloy-layer 11 is with a thickness of 2.5 microns (such as the).When more than 2.5 microns, the such as the 12nd
In group alloy-layer 11 with a thickness of 3.5 microns, at this time elongation percentage down ratio be 3%, be more than the upper limit 2%, will significantly affect
The steel plate later period uses.Thus may determine that 2.5 microns of design maximums for alloy-layer 11.
Further, it as can be seen from Table 2 when corroding area is 0, and when elongation percentage down ratio is less than 2%, closes
Layer gold 11 with a thickness of 2 microns and 2.3 microns, with this can by 2 microns, with 2.3 microns be determined as optimal thickness.
Second embodiment
A kind of resistant to rust cold-rolled steel sheet provided in the present embodiment, different from the first embodiment, due to alloy-layer
The determination of thickness is directly related with manganese equivalent, therefore one of the method for eliminating corrosion, exactly works as the manganese reduced in steel plate ontology
Measure (Mneq), the corrosion degree of manganese equivalent and steel plate ontology is conducted further research to obtain in the present embodiment:
Table 3
By table 3 it is known that when manganese equivalent is 1.14-5.75, and the thickness of alloy-layer is greater than 0.5* (Mneq)0.5When, steel
Plate ontology has best anti-corrosion effect, and elongation percentage down ratio is less than or equal to 2, meets requirement.Herein, it can see
Manganese equivalent and corrosion area are in certain positive correlation out, therefore the resistant to rust ability of the lower steel plate ontology of manganese equivalent is stronger, but manganese
Equivalent can not be without the reduction of lower limit, in the present embodiment, and the lower limit value of manganese equivalent takes 1%, while reaching in manganese equivalent
It is 1% that area is corroded when 5.75%, and the upper limit of manganese equivalent takes 6% in the present embodiment, thus the interval value of manganese equivalent be [1%,
6%], wherein the specific value that can be got can have 2%, 3%, 4%, 5% etc..
3rd embodiment
A kind of resistant to rust cold-rolled steel sheet provided in the present embodiment, the structure based on first embodiment, alloy-layer metal with
Substrate directly contacts, therefore in general requires the galvanic couple potential difference between alloy-layer and substrate cannot be too big, if galvanic couple
Point difference is too big, will cause and forms galvanic corrosion between substrate and alloy-layer, accelerating corrosion.
In addition, the standard electrode potential of alloy-layer also can not be excessively high.If the standard electrode potential of alloy-layer is too high, although
With good anti-corrosion property, but it is easy to form galvanic effect between substrate, once there is diameter in alloy-layer is more than
The slight void of 10nm (10nm ± 2nm) will lead to chloride ion and oxonium ion and react with substrate.If instead alloy-layer
Standard electrode potential it is too low, although have good anode loss protection effect, possibility corrosion reaction cause fastly very much
Existing evolving hydrogen reaction, so that alloy-layer loose hole occurs rapidly and fails.
Further, carrying out research to the electrode potential of alloy-layer can be obtained:
Table 4
It can be seen from Table 4 that guaranteeing alloy layer thickness greater than 0.5* (Mneq)0.5, manganese equivalent is in range 1%-6%
Between when, during the standard electrode potential of alloy-layer is increased to 0.86v by -2.37v, corrodes area and by 22% be reduced to 0,
It is then raised to 31%；When specific corrosion area is less than 2%, the range of the standard electrode potential of alloy-layer be [-
0.76v, -0.14v]；Further, since -0.76v can in the case where not being accurate to double-digit situation strictly close to -0.8v
Directly -0.8v is taken to carry out using the value of the other end similarly also can directly take 0v or -0.1v, therefore alloy-layer can be obtained
Standard electrode potential value interval [- 0.8v, 0v] or [- 0.8v, -0.1v].In addition, the section can use numerical value can have-
0.7v, -0.6v, -0.5v, -0.4v, -0.3v, -0.2v etc..
Fourth embodiment
Manufacturing method for manufacturing the resistant to rust cold-rolled steel sheet that first arrives 3rd embodiment is provided in the present embodiment.
Referring to Fig. 6, the specific steps of the manufacturing method of resistant to rust cold-rolled steel sheet provided by the invention comprising:
Step S11: smelting steel billet, controls the alloying element content in steel billet；
Step S12: steel billet is successively heated, roughing, finish rolling, cooling, cold rolling, obtains steel plate ontology；The manganese is worked as
Amount is according to Mneq=10*C%+Mn%+0.5*Cr% is obtained, wherein MneqFor the manganese equivalent in the steel plate ontology, C% is institute
The carbon content in steel plate ontology is stated, Mn% is the manganese content in the steel plate ontology, and Cr% is that the chromium in the steel plate ontology contains
Amount.
Step S13: the steel plate ontology is successively surface-treated, is heat-treated and is batched, it is cold to obtain the resistant to rust
Rolled steel plate.
Surface treatment therein specifically: be more than or equal to 0.5* (Mn in the surface cladding thickness of the steel plate ontologyeq)0.5
The alloy-layer of micron, concretely 2.5 microns or 2 microns.Further, the thickness of the alloy-layer is less than or equal to 2.5 microns.
Further, the range that can control the standard electrode potential of alloy-layer is -0.8V-0V, improves anti-corrosion effect.
When covering alloy layer, specifically can be used: physical vapour deposition (PVD) and or plating and or the modes such as jet deposition, guarantee
Alloy-layer is compact-sized, has good resistant to rust ability, and the method for covering alloy layer can take single use or be used in mixed way
With no restrictions.
In summary:
Compared with prior art, a kind of resistant to rust cold-rolled steel sheet provided in an embodiment of the present invention and its manufacturing method, this is anti-
Corrosion cold-rolled steel sheet includes steel plate ontology and the alloy-layer for being covered in steel plate body surface, it is of the invention according to the carbon of steel plate ontology
Content and manganese content determine the manganese equivalent of the steel plate ontology, and the alloy layer thickness being arranged is related to manganese equivalent.Control manganese is worked as
Amount is 1%-6%, and the height of manganese equivalent can directly reflect the degree that galvanic interaction occurs of steel plate ontology, in the present invention
The thickness minimum value of middle alloy-layer is determined according to manganese equivalent.Guarantee that the thickness of alloy-layer is more than or equal to 0.5* (Mn simultaneouslyeq)0.5
Micron, and the range of standard electrode potential is -0.8V-0V, is had after finally making steel plate ontology be capped alloy-layer good
Resistant to rust effect.Therefore, resistant to rust cold-rolled steel sheet of the invention is the process and cost for not increasing subsequent storage and transportation, using the case where
Under, there is good rustless property.
In the fourth embodiment of the application, it should be understood that disclosed method, it can also be real by another way
It is existing.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of resistant to rust cold-rolled steel sheet characterized by comprising steel plate ontology and alloy-layer, the alloy-layer are covered on institute
State the surface of steel plate ontology；The degree thickness of the alloy-layer is more than or equal to 0.5* (Mneq)0.5Micron, the standard electric of the alloy-layer
The range of electrode potential is -0.8V-0V, and the manganese equivalent of the steel plate ontology is 1%-6%, and the manganese equivalent is according to Mneq=10*
C%+Mn%+0.5*Cr% is obtained, wherein MneqFor the manganese equivalent in the steel plate ontology, C% is in the steel plate ontology
Carbon content, Mn% are the manganese content in the steel plate ontology, and Cr% is the chromium content in the steel plate ontology.
2. resistant to rust cold-rolled steel sheet according to claim 1, which is characterized in that the manganese equivalent is 3%-4%.
3. resistant to rust cold-rolled steel sheet according to claim 1, which is characterized in that the thickness of the alloy-layer is less than or equal to
2.5 micron.
4. resistant to rust cold-rolled steel sheet according to claim 3, which is characterized in that the alloy layer thickness is 2 microns.
5. resistant to rust cold-rolled steel sheet according to claim 1, which is characterized in that the space structure of the alloy-layer are as follows: column
Shape structure, layer structure, mono-crystalline structures or isometric crystal structure.
6. a kind of manufacturing method of resistant to rust cold-rolled steel sheet, cold for producing the resistant to rust of any of claims 1-5
Rolled steel plate, which is characterized in that the described method includes:
Steel billet is smelted, the alloying element content in steel billet is controlled；
Steel billet is successively heated, roughing, finish rolling, cooling, cold rolling, obtains steel plate ontology；
The steel plate ontology is successively surface-treated, is heat-treated and is batched, the resistant to rust cold-rolled steel sheet is obtained；
Wherein, controlling the alloying element content in the steel billet makes the manganese equivalent of the steel plate ontology be 1%-6%, the manganese
Equivalent is according to Mneq=10*C%+Mn%+0.5*Cr% is obtained, wherein MneqFor the manganese equivalent in the steel plate ontology, C% is
Carbon content in the steel plate ontology, Mn% are the manganese content in the steel plate ontology, and Cr% is the chromium in the steel plate ontology
Content；The surface treatment is the surface cladding thickness in the steel plate ontology more than or equal to 0.5* (Mneq)0.5Micron, and alloy
The standard electrode potential of layer is -0.8V-0V.
7. according to the method described in claim 6, it is characterized in that, the alloying element content in the control steel billet make it is described
The manganese equivalent of steel plate ontology is 3%-4%.
8. according to the method described in claim 6, it is characterized in that, the thickness of the alloy-layer is less than or equal to 2.5 microns.
9. according to the method described in claim 6, it is characterized in that, the thickness of the alloy-layer is less than or equal to 2 microns.
10. according to the method described in claim 6, it is characterized in that, the space structure of the alloy-layer are as follows: column structure, layer
Shape structure, mono-crystalline structures or isometric crystal structure.
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