CN107234132A - The production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate - Google Patents
The production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate Download PDFInfo
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- CN107234132A CN107234132A CN201610179709.1A CN201610179709A CN107234132A CN 107234132 A CN107234132 A CN 107234132A CN 201610179709 A CN201610179709 A CN 201610179709A CN 107234132 A CN107234132 A CN 107234132A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
Abstract
The invention discloses a kind of production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate, including：Step 1, the surface for chrome substrate being plated to secondary cold-rolling carries out three passage roll dressings, wherein, the first passage is corase grind, and the second passage is refined for half, and the 3rd passage is fine grinding；Step 2, specific working roll mean roughness, rolling depressing force and rolling milimeter number are selected according to frame；Step 3, the surface for chrome substrate being plated to secondary cold-rolling carries out alkali cleaning；Step 4, the surface for chrome substrate being plated to secondary cold-rolling carries out pickling；Step 5, chromium plating process is carried out to the secondary cold-rolling plating chrome substrate after alkali cleaning, pickling using conventional chrome-plated process.The production method of the high corrosion-resistant secondary cold-rolling chromium plating steel plate of the present invention improves the cleansing power of secondary cold-rolling chromium plating substrate surface and the corrosion resistance of secondary cold-rolling chromium plating plate surface, and reduces the mass defect incidences such as chromium plating surface of steel plate point rust simultaneously.
Description
Technical field
The present invention relates to the production control method of chromium plating steel plate, more specifically to a kind of high anti-corrosion
The production method of property secondary cold-rolling chromium plating steel plate.
Background technology
Chromium plating steel plate is to carry out electrolytic chromate processing in surface of steel plate, makes surface of steel plate deposited metal chromium
Layer and chromium aqua oxidation nitride layer.Chromium plating steel plate it is general by substrate, metallic chromium layer, chromium hydrous oxide
Four layers of composition of layer and oil film.It is generally acknowledged that crome metal thickness of coating is 70mgm-2, equivalent to about
0.01 ì m thickness, producer's general control is in 100mgm-2Left and right.The hydrous oxide film of chromium is general
Control is in 7~15mgm-2Left and right.The surface total chrome of tin free steel sheet is about 110mgm-2.Chromium plating
The features such as steel sheet product has low cost, adhesive force is strong, heat-resisting quantity is good, resistance to SO_2 is strong, widely
Applied to packaging industries such as crown plug, four spiral covers, the top bottom of opentop and drawn cans.
With being growing more intense for market competition, chromium plating substrate steel sheet continues to send out to economizing type " thinned " direction
Exhibition.For rolling mill practice angle, i.e., the thickness of substrate is reduced using Double Cold Reduction Technology, this is to bending
Take intensity, surface physical characteristic etc. and propose higher requirement.Baosteel flat cold-rolled sheet factory secondary cold-rolling unit
After being constructed and put into operation, carried out series of new techniques, new technology research, including very thin material lubrication and
Research, secondary cold rolled material continuous annealing and the secondary cold-rolling of cooling technique produce consistent, reduction mould
Formula switching time and raising production stability are studied, secondary cold-rolling mathematical modeling Strip Shape Control ability is excellent
The research such as change, makes Baosteel Double Cold Reduction Technology be developed and improve.Such as in secondary cold-rolling kernel model
In terms of research, with reference to the equipment and production technology characteristic of secondary cold-rolling unit, according to incoming profile situation,
Rolling technological parameter and mathematical modeling are continued to optimize, mill speed is not only increased, yield is improved,
Also there is secondary cold-rolling strip shape quality to be obviously improved.But secondary cold-rolling is deformed when producing DR material products
Amount is larger, and rolling stability is not enough, causes secondary cold-rolling chromium plating substrate surface characteristics to occur significantly to become
Change, the fluctuation of such as roughness, rolling line directionality are substantially, substrate topography sends out compared with a material
Give birth to obvious change, the residual iron of Residual oil to greatly improve, etc., this affects the coating work in downstream
The corrosion resistance of skill, especially chrome-plated process and products thereof.
In addition, the variation with downstream user to chrome plating products application, causes chromium plating steel sheet product
Environmental difference is big during turnover transport and inventory time increases, and this is to chromium plating steel sheet product corrosion resistance of surface
It is required that the also corrosion resistance of more and more higher, especially secondary cold-rolling chromium plating steel plate.Correlative study shows, two
Secondary cold rolling chromium plating substrate surface characteristics (including the residual iron of surface roughness, Residual oil) have had a strong impact on plating
The corrosion resistance of chromium steel plate.This mainly due to, compared with tin plate, chrome plating overlay coating is very thin,
And plating solution viscosity is larger, covering power is low, and conductive capability is poor, the rolling of secondary cold-rolling chromium plating substrate surface
Line high directivity and high compared with the residual iron of deep, Residual oil, causes substrate to roll layers of chrome in line very thin or without plating
Layers of chrome；Chromium plating production process current efficiency is relatively low, and only 21%~25%, side reaction causes coating hole
Gap rate is larger, skewness；Chrome-plated process is without mild melt treatment, and its adhesion is very fragile, holds very much
Easily be corroded dielectric breakdown, etc..
Due to grasping not enough to the corrosion proof problem of chrome plating, a material of current chromium plating steel plate and secondary
Material using identical chrome-plated process parameter and control standard, is added, and chromium plating steel sheet product is from production
Used to user, often undergo the turnover transport and warehousing even more than half a year in 2~3 months, various regions are wet
Degree, temperature difference are larger, it is easy to cause chromium plating surface of steel plate ＂ perspiration ＂, cause product surface
Point rust defect.
Generally speaking, the corrosion resistance influence factor of secondary cold-rolling chromium plating steel plate is more complicated, not only includes
Chrome-plated process, thickness of coating, and the surface topography and its surface Residual oil of secondary cold-rolling plating chrome substrate are residual
The control problem of iron also has on chromium plating steel plate corrosion resistance significantly to be influenceed.Based on this, patent of the present invention
The problem of considering secondary cold-rolling chromium plating substrate surface feature, the residual iron of Residual oil is big, targetedly carry
Alkali cleaning, the acid cleaning process technology of secondary cold-rolling surface roughness control technology and novelty are gone out, in phase
With chrome-plated process under the conditions of (with reference to patent CN200910053847.5 or
CN201110006936.1), the product of high corrosion-resistant secondary cold-rolling chromium plating steel plate is developed.
Because operation of rolling drafts is big, secondary cold-rolling chromium plating substrate surface rolling line is existed significantly
Directionality, the residual iron of Residual oil is also significantly improved, and is enriched in the residual iron of Residual oil at rolling line ＂ pits ＂ more,
Cause the residual iron of Residual oil in the chrome-plated process of downstream to be difficult to clean, ＂ depth recess ＂ rollings line can not deposited plating layer,
And then the corrosion resistance of chromium plating surface of steel plate is reduced, cause the more quality of secondary chromium plating surface of steel plate
Defect, such as puts rust, pore, ＂ boilings ＂ discolorations.Asked further, since corrosion proof to chrome plating
Topic understanding is not enough, and a material of current chromium plating steel plate and secondary material use identical chrome-plated process condition
With control standard, secondary cold-rolling chrome plating corrosion resistance of surface is greatly reduced, it is characterized with iron solution value
Corrosion resistance, the secondary cold iron solution value for pricking chromium plating surface of steel plate is 350mg/m2More than.
The content of the invention
For the product defects of secondary cold-rolling chromium plating steel plate present in prior art, the purpose of the present invention
It is to provide a kind of production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate, including：Step 1, to secondary
The surface of cold rolling plating chrome substrate carries out three passage roll dressings, wherein, the first passage is corase grind, second
Passage is refined for half, and the 3rd passage is fine grinding；Step 2, rolled out according to the specific work of frame selection
Equal roughness, rolling depressing force and rolling milimeter number；Step 3, the table of chrome substrate is plated to secondary cold-rolling
Face carries out alkali cleaning；Step 4, the surface for chrome substrate being plated to secondary cold-rolling carries out pickling；Step 5, use
Conventional chrome-plated process carries out chromium plating process to the secondary cold-rolling plating chrome substrate after alkali cleaning, pickling.
According to one embodiment of the invention, corase grind current control is in 28A~35A, and planker is traversing to be
1500-2000mm/min；Half refines and polishes current control in 10~20A, and the traversing control of planker exists
1200-1500mm/min；The traversing control of fine-grinding and polishing planker is in 1000-1200mm/min, grinding
Current control is in 5-8A, ± 5 turns/min of head frame rotating speed (40~60).
According to one embodiment of the invention, the mean roughness of the Rolling roller that step 1 is used for
The ì m of the ì m of Ra0.1~0.3 ì m or Ra0.6~0.9, the maximum height Rz of vertical rolling direction profile≤2.0,
The ì m of the distance between peak of profile top line and valley line Rsm >=260, vertical rolling direction roughness peak
Rpc≤60。
According to one embodiment of the invention, step 2 includes the first frame and the second frame, the first frame
Mean roughness be the ì m of Ra0.1~0.3, the mean roughness of the second frame is the ì m of Ra0.6~0.9.
According to one embodiment of the invention, the roll-force of the first frame is voluntarily adjusted according to substrate thickness,
Second frame uses constant roll-force 300-350 tons.
According to one embodiment of the invention, rolling milimeter number≤60km of step 2.
According to one embodiment of the invention, the secondary cold-rolling after being processed by step 2 plates chrome substrate
The ì m of the ì m of average roughness Ra 0.4~0.6, the maximum height Rz of vertical rolling direction profile≤1.8, profile
The ì m of the distance between summit line and valley line Rsm >=240, vertical rolling direction roughness peak Rpc≤40.
According to one embodiment of the invention, the soda-wash solution composition of alkali cleaning is：Sodium hydroxide：
30~50g/L, neopelex (C18H29NaO3S)：5~9g/L, N, N- dioctyl ammonia
Ethyl glycine (C22H48ClN3O2)：2~6g/L, NH4F：1~5g/L；Bath temperature 35~55
DEG C, 20~40A/dm of current density2。
According to one embodiment of the invention, the Acidwash solution composition of pickling is：Sulfuric acid：20~50g/L,
HF：1~5g/L, iron concentration is less than 8g/L, 25~35 DEG C of bath temperature, current density
15~25A/dm2。
In the above-mentioned technical solutions, the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate of the invention
Improve secondary cold-rolling chromium plating substrate surface cleansing power and secondary cold-rolling chromium plating plate surface it is anti-corrosion
Property, and the mass defect incidences such as chromium plating surface of steel plate point rust are reduced simultaneously.
Brief description of the drawings
Fig. 1 is the flow chart of the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate of the present invention.
Embodiment
Technical scheme is further illustrated with reference to the accompanying drawings and examples.
By changing processing parameter conditions such as (including current density, bath temperature, plating solution) constituting
The corrosion resistance of secondary cold-rolling chrome plating can be improved, but in wet weather environment, chrome plating surface point
Rust defect happens occasionally, especially secondary cold-rolling plating ferrochrome product its surface point rust hair uncontrollable always
Raw rate.Based on this, the present invention disclose a kind of secondary cold-rolling surface roughness control method and novel
Alkali cleaning, acid cleaning process technology, under the conditions of using identical chrome-plated process, carry out high corrosion-resistant secondary
The method of cold rolling chromium plating Plate Production.
As shown in figure 1, the production method of the high corrosion-resistant secondary cold-rolling chromium plating steel plate of the present invention is mainly wrapped
Include following 5 steps：
S1：The surface that chrome substrate is plated to secondary cold-rolling carries out three passage roll dressings, wherein, first
Secondary is corase grind, and the second passage is refined for half, and the 3rd passage is fine grinding.
Specifically, corase grind current control is in 28A~35A, and planker is traversing to be
1500-2000mm/min；Half refines and polishes current control in 10~20A, and the traversing control of planker exists
1200-1500mm/min；The traversing control of fine-grinding and polishing planker is in 1000-1200mm/min, grinding
Current control is in 5-8A, ± 5 turns/min of head frame rotating speed (40~60).
The mean roughness of the Rolling roller used in this step for the ì m of Ra0.1~0.3 or
The ì m of the ì m of Ra0.6~0.9, the maximum height Rz of vertical rolling direction profile≤2.0, peak of profile top line and paddy
The ì m of the distance between bottom line (average headway of profile irregularity) Rsm >=260, vertical rolling side
To roughness peak Rpc≤60.
S2：Specific working roll mean roughness, rolling depressing force and rolling kilometer are selected according to frame
Number.
Using 2 frames in this step, i.e. the first frame 1# and the second frame 2#, 1# frame are used
Less roughness matches somebody with somebody roller, and average roughness Ra 0.1~0.3 ì m, 2# frame uses larger roughness
With roller, the ì m of average roughness Ra 0.6~0.9.1# frames roll-force is voluntarily adjusted according to substrate thickness AGC
Whole, 2# frames use constant roll-force 300-350 tons.In this step, milimeter number≤60km is rolled.
After being processed by above-mentioned steps, the secondary cold-rolling plating chrome substrate of gained meets following parameter：
The ì m of average roughness Ra 0.4~0.6 ì m, Rz≤1.8 ì m (vertical rolling direction), Rsm >=240
(the distance between peak of profile top line and valley line), Rpc≤40 (vertical rolling direction).
According to the basic control technology of rolling mill practice, chrome plating base plate surface roughness mainly passes through thing
The roll for first passing through frosting treatment duplicates in the operation of rolling and arrives surface of steel plate, the surface topography of roll
Determine surface of steel plate pattern.When with certain drafts rolling, roller surface hill is pressed in rolling
In the presence of power, surface of steel plate is squeezed into, surface of steel plate metal is reached yield limit in a short time,
And occur local plastic deformation.According to the principle of constancy of volume in theory of plastic strain in matrix, surface of steel plate
Metal swells under squeezing action to roll groove position, forms the hill of surface of steel plate.Such roll
Surface topography surface of steel plate is copied to by the relation reversely duplicated, form the table with similar structure
Face pattern, while being enriched in the deep recess ＂ rollings lines of ＂ the residual iron of the Residual oil for also resulting in chromium plating substrate surface more.
Therefore, the surface roughness control of plating chrome substrate mainly considers the grinding of roll, rolling depressing force, rolled
Roller is also considered as substrate with the factors such as roller and replacement cycle, the in addition raising of chrome plating corrosion resistance of surface
The cleaning technique of the residual iron of surface Residual oil.
Chromium ion receives electronics in electrode surface and as Adsorption of Chromium atom, there is electric discharge theoretical draw comprehensively
The theoretical two kinds of viewpoints of portion's electric discharge.At the initial stage of plating, if matrix surface is smooth (i.e. Ra values are small), table
Face electric discharge is uniform, is now electric discharge comprehensively, chromium is in matrix surface while forming core；And matrix surface goes out
When now substantially uneven (Ra values are big), surface-discharge collection neutron, in boss, is now office
Portion discharges, position preferential forming core of chromium in rat.Exactly the effect of current spike effect, makes
Obtain coating at spike to thicken comparatively fast, valley portions are thickened relatively slowly, but the area of bossing is smaller, chromium
Crystallite dimension is more tiny, accumulate more sparse.With the increase of electroplating time, the base steel of different roughness
The continuous forming core of body surface face chromium and grow up, the smooth steel matrix surface chromium grain growth speed in surface is fast, makes
On smooth steel matrix surface chromium crystal grain distribution it is fine and close and thick.While coating is thickened, peak
Difference in height between paddy is also increasing, and coating surface is further coarse.If matrix roughness is small before plating,
Coating thickens more uniform, gentle between peak valley when then electroplating.Though coating surface roughness has compared with matrix
Increased, but increasing degree is smaller, and coating also seems smooth careful.When steel matrix surface occurs substantially
When uneven, chromium crystal grain seems tiny and is distributed loose.After electroplating time reaches certain time,
The difference of the steel matrix surface chromium crystallite dimension of different roughness is minimized.But in low roughness
Chromium number of die is more than high roughness steel matrix all the time in steel matrix unit area.
Analyzed more than, substrate surface characteristics not only determine its surface average roughness Ra, and
Rpc and Rz determine the number at peak and the depth of rolling line in the operation of rolling, and prior Rsm determines
Unevenness in the operation of rolling is determined, this have impact on the wetability of plating solution.
S3：The surface that chrome substrate is plated to secondary cold-rolling carries out alkali cleaning.
Specifically, the soda-wash solution composition of caustic scrubbing step is：Sodium hydroxide：30~50g/L, 12
Sodium alkyl benzene sulfonate (C18H29NaO3S)：5~9g/L, N, N- dioctyl aminoethyl glycine
(C22H48ClN3O2)：2~6g/L, NH4F：1~5g/L；35~55 DEG C of bath temperature, electric current is close
Spend 20~40A/dm2。
S4：The surface that chrome substrate is plated to secondary cold-rolling carries out pickling.
Specifically, the Acidwash solution composition of pickling is：Sulfuric acid：20~50g/L, HF：1~5g/L,
Iron concentration is less than 8g/L, 25~35 DEG C of bath temperature, 15~25A/dm of current density2。
The residual iron of Residual oil of secondary cold-rolling chromium plating substrate surface is high, and line Residual oil is rolled at the deeply recessed ＂ of especially ＂
It is residual to turn into the key of influence chrome plating corrosion resistance of surface.Alkali wash water composition DBSA of the present invention
Sodium (C18H29NaO3) and N, N- dioctyl aminoethyl glycine (C S22H48ClN3O2) 2~6g/L
It is the surfactant of zwitterion respectively, strengthens the Residual oil reactivity of substrate surface, and then improve
The cleansing power of sodium hydroxide.For additive NH4F, its main function is the infiltration for improving alkali wash water
Residue at rolling line at ability, the deeply recessed ＂ of reinforcing cleaning ＂.Sulfuric acid in pickle is main by changing
The residual iron that reaction removes substrate surface is learned, HF main function is also the osmotic energy for improving pickle
Power.Iron concentration control is less than 8g/L in pickle, can eliminate concentration polarization, improves hydrogen ion
Discharging efficiency, and then strengthen pickling effect.
S5：Chromium plating is carried out to the secondary cold-rolling plating chrome substrate after alkali cleaning, pickling using conventional chrome-plated process
Processing, finally obtains the high corrosion-resistant secondary cold-rolling chromium plating steel sheet product of the present invention.
Above-mentioned technical proposal is further illustrated below by one embodiment：
S1：Control the surface physical characteristic of roll：Using the technology of three passage roll dressings, that is, roughly grind,
Half refines and refines.Current control is in 28A~35A during corase grind, and planker is traversing to be
1500-2000mm/min；Current control is in 10~20A when half fine grinding and polishing, the traversing control of planker
In 1200-1500mm/min；The traversing control of final pass fine-grinding and polishing planker is in 1000-1200mm/
Min, grinding current control is in 5-8A, ± 5 turns/min of head frame rotating speed (40~60).
Now, it is ensured that the ì m of ì m of average roughness Ra 0.1~0.3 of Rolling roller or 0.6~0.9 ì m, Rz≤2.0
(vertical rolling direction), the ì m (the distance between peak of profile top line and valley line) of Rsm >=260,
Rpc≤60 (vertical rolling direction)；Ensure Rolling roller the ì m of average roughness Ra 0.1~0.3 or
0.6~0.9 ì m, Rz≤2.0 ì m (vertical rolling direction), Rsm >=260 ì m (peak of profile top line and paddy
The distance between bottom line), Rpc≤60 (vertical rolling direction).
S2：Control secondary cold-rolling chromium plating substrate surface physical characteristic：Roller is matched somebody with somebody in control：1# frames use compared with
Small roughness matches somebody with somebody roller, and average roughness Ra 0.1~0.3 ì m, 2# frame is matched somebody with somebody using larger roughness
Roller, the ì m of average roughness Ra 0.6~0.9.Controlled rolling depressing force, i.e., 1# frames roll-force is according to base
Plate thickness AGC is voluntarily adjusted, and 2# frames use constant roll-force 300-350 tons.Control working roll
Rolling milimeter number≤60km.
Now, it is ensured that secondary cold-rolling chromium plating base plate surface roughness meets following parameter：Mean roughness
The ì m of Ra0.4~0.6 ì m, Rz≤1.8 ì m (vertical rolling direction), Rsm >=240 (peak of profile top line and
The distance between valley line), Rpc≤40 (vertical rolling direction) obtains secondary cold-rolling chromium plating base
Plate NO.1；
S3：Configure alkali wash water：By sodium hydroxide (NaOH), neopelex
(C18H29NaO3S), N, N- dioctyl aminoethyl glycine (C22H48ClN3O2) and ammonium fluoride
(NH4F) dissolve in water, addition amount of sodium hydroxide 45g/L, neopelex addition 7g/L,
N, N- dioctyl aminoethyl glycine addition 3g/L, ammonium fluoride addition 2g/L, using sodium hydroxide
Control solution ph 14.
Using Conventional heaters, alkali wash water temperature 45 C, current density 30A/dm are controlled2, to secondary
Cold rolling plating chrome substrate NO.1 carries out ungrease treatment, obtains Oil residue on surface<1mg/m2Secondary cold-rolling is plated
Chrome substrate NO.2.
S4：Configure pickle, i.e. sulfuric acid (H2SO4) addition 30g/L, hydrofluoric acid (HF) plus
Enter amount 2g/L, iron ion addition 3g/L (is added, it is intended to simulate produced on-site) in ferric sulfate form.
Using Conventional heaters, 30 DEG C of control pickle temperature, current density 20A/dm2, to secondary
Cold rolling plating chrome substrate NO.2 processing, obtains the residual iron in surface<1mg/m2Secondary cold-rolling chromium plating base
Plate NO.3.
S5：Chrome substrate NO.3 is plated to secondary cold-rolling using conventional chrome-plated process and carries out chromium plating process, i.e.,
High corrosion-resistant secondary cold-rolling chromium plating steel sheet product is obtained, its iron solution value is 168mg/m2。
In summary, beneficial effects of the present invention have：
1. the control based on mill rod technology and Bar Rolling Process, it is proposed that be adapted to secondary cold-rolling chromium-plated steel
The surface characteristic control technology of plate；
2. it is low to develop environmental protection, cost, the alkali wash water and pickle that can be recycled are improved
The cleansing power of secondary cold-rolling chromium plating substrate surface；
3. improving the corrosion resistance of secondary cold-rolling chromium plating plate surface, its iron solution value is less than 240mg/m2,
The mass defect incidences such as chromium plating surface of steel plate point rust are reduced, economic benefit is obvious.
Those of ordinary skill in the art is it should be appreciated that the embodiment of the above is intended merely to
The bright present invention, and be not used as limitation of the invention, as long as in the spirit of the present invention
Interior, change, modification to embodiment described above will all fall in the range of claims of the present invention.
Claims (9)
1. a kind of production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate, it is characterised in that including：
Step 1, the surface for chrome substrate being plated to secondary cold-rolling carries out three passage roll dressings, wherein, the
A time is corase grind, and the second passage is refined for half, and the 3rd passage is fine grinding；
Step 2, specific working roll mean roughness, rolling depressing force and rolling are selected according to frame
Milimeter number；
Step 3, the surface for chrome substrate being plated to secondary cold-rolling carries out alkali cleaning；
Step 4, the surface for chrome substrate being plated to secondary cold-rolling carries out pickling；
Step 5, the secondary cold-rolling plating chrome substrate after alkali cleaning, pickling is carried out using conventional chrome-plated process
Chromium plating process.
2. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
Current control is roughly ground in 28A~35A, traversing planker is 1500-2000mm/min；
Half refines and polishes current control in 10~20A, and the traversing control of planker exists
1200-1500mm/min；
The traversing control of fine-grinding and polishing planker is ground current control in 5-8A in 1000-1200mm/min,
Head frame rotating speed (40~60) ± 5 turns/min.
3. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
The mean roughness for the Rolling roller that the step 1 is used for the ì m of Ra0.1~0.3 or
The ì m of the ì m of Ra0.6~0.9, the maximum height Rz of vertical rolling direction profile≤2.0, peak of profile top line and paddy
The ì m of the distance between bottom line Rsm >=260, vertical rolling direction roughness peak Rpc≤60.
4. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
Step 2 includes the first frame and the second frame, and the mean roughness of first frame is
The ì m of Ra0.1~0.3, the mean roughness of the second frame is the ì m of Ra0.6~0.9.
5. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
The roll-force of first frame is voluntarily adjusted according to substrate thickness, and the second frame is rolled using constant
Power 300-350 tons processed.
6. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
Rolling milimeter number≤60km of step 2.
7. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
Secondary cold-rolling after being processed by the step 2 plates the mean roughness of chrome substrate
The ì m of the ì m of Ra0.4~0.6, the maximum height Rz of vertical rolling direction profile≤1.8, peak of profile top line and paddy
The ì m of the distance between bottom line Rsm >=240, vertical rolling direction roughness peak Rpc≤40.
8. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
The soda-wash solution composition of the alkali cleaning is：
Sodium hydroxide：30~50g/L,
Neopelex (C18H29NaO3S)：5~9g/L,
N, N- dioctyl aminoethyl glycine (C22H48ClN3O2)：2~6g/L,
NH4F：1~5g/L；
35~55 DEG C of bath temperature, 20~40A/dm of current density2。
9. the production method of high corrosion-resistant secondary cold-rolling chromium plating steel plate as claimed in claim 1, it is special
Levy and be：
The Acidwash solution composition of the pickling is：
Sulfuric acid：20~50g/L,
HF：1~5g/L,
Iron concentration is less than 8g/L, 25~35 DEG C of bath temperature, 15~25A/dm of current density2。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108263302A (en) * | 2017-12-18 | 2018-07-10 | 合肥亿恒智能科技股份有限公司 | A kind of vehicle complete vehicle controller lower carriage |
| CN109712897A (en) * | 2017-10-26 | 2019-05-03 | 中芯国际集成电路制造(上海)有限公司 | A kind of semiconductor devices and preparation method thereof, electronic device |
| CN112853221A (en) * | 2019-11-28 | 2021-05-28 | 宝山钢铁股份有限公司 | Chromium plating plate for easy-open end and processing method thereof |
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| CN101928966A (en) * | 2009-06-25 | 2010-12-29 | 宝山钢铁股份有限公司 | Method for plating chrome on surface of thin plate |
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| JPH02303612A (en) * | 1989-05-19 | 1990-12-17 | Mitsubishi Heavy Ind Ltd | Method for grinding roll |
| CN101513647A (en) * | 2008-02-22 | 2009-08-26 | 宝山钢铁股份有限公司 | Method for leveling strip produced by secondary cold rolling unit |
| CN101928966A (en) * | 2009-06-25 | 2010-12-29 | 宝山钢铁股份有限公司 | Method for plating chrome on surface of thin plate |
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| CN108263302A (en) * | 2017-12-18 | 2018-07-10 | 合肥亿恒智能科技股份有限公司 | A kind of vehicle complete vehicle controller lower carriage |
| CN112853221A (en) * | 2019-11-28 | 2021-05-28 | 宝山钢铁股份有限公司 | Chromium plating plate for easy-open end and processing method thereof |
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| CN107234132B (en) | 2019-09-20 |
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