CN106917039B - A kind of flash plating cold rolling tin plate and its manufacturing method - Google Patents
A kind of flash plating cold rolling tin plate and its manufacturing method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/30—Electroplating: Baths therefor from solutions of tin
- C25D3/32—Electroplating: Baths therefor from solutions of tin characterised by the organic bath constituents used
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
- C25D5/505—After-treatment of electroplated surfaces by heat-treatment of electroplated tin coatings, e.g. by melting
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Abstract
The present invention relates to a kind of flash plating cold rolling tin plate and its manufacturing method, the solution tin plating layer weight of prior art light plate single side is 0.9~2.2g/m2The high technical problem of the tin plating layer porosity of cold rolling tin plate.A kind of flash plating cold rolling tin plate provided by the invention, the chemical component weight percentage of its substrate are as follows: C:0.05%~0.10%, Si≤0.04%, Mn:0.2%~0.4%, P≤0.02%, S≤0.02%, Alt:0.02%~0.05%, P≤0.004%%, N≤0.0035%, surplus are Fe and inevitable impurity element.Present invention is mainly used for the packaging fields such as beverage/food tank.
Description
Technical field
The present invention relates to a kind of cold rolling tin plate and its manufacturing method, in particular to a kind of flash plating cold rolling tin plate
And its manufacturing method, it is 0.9~2.2g/m in particular to the tin plating layer weight of steel plate single side2Cold rolling tin plate and its system
Method is made, technical field of iron-base alloy is belonged to.
Background technique
With the rising of metallic tin price and from the angle for saving metal resource, guaranteeing tin plate sheet surface characteristic
Under the premise of, the tin layers forward direction of tin plate is thinned development, and main product is 2.8g/m at present2And it is less than 2.8g/m2Tin layers,
Being mainly used for beverage/food can body and top bottom cover will make only when acting on stronger food cans for certain electrochemistry detins
It is higher than 5.6g/m with tin coating weight2Thickness coating.However, the thinned of tin layers also increases a possibility that its surface characteristic is deteriorated,
This is because in the case where tin amount is less, it is difficult to accomplish the entire tin plate sheet surface of uniform fold, and the uneven of tin layers then can
The form of its subsequent alloy-layer, passivation layer is influenced, and then influences the surfaces characteristic such as its corrosion resistance, adhesion.
Mainstream electrotinning lines generally use phenolsulfonic acid electroplate liquid and carry out tin plating, this method technology maturation, product matter
Amount is stablized, but because containing benzene in plating solution, the feature of environmental protection is poor；Methane sulfonic acid electroplate liquid is a kind of emerging plating solution of tin plating board industry, is removed
Outside environment-friendly advantage, the advantages such as electroplating operations range is wide, power consumption is low are also equipped with, but in specific industrial application, also expose
It requires feature high, that electroplating effect is not easy to control, especially when producing flash plating, tin layers unevenness, leakage easily occur substrate
The problems such as plating.
In the prior art, usually increase side cover in the plating process, the electricity for stopping edge excessively intensive by side cover
The line of force eliminates the edge thickening effect of tin coating, and Chinese patent application CN200710037328.0 improves electroplating evenness
Method is set on the edge of baffle using a baffle with windowing is put between the to-be-electroplated surface and anode as cathode
The rib to connect together with baffle is put, the power line for bypassing baffle edge is eliminated with rib.But above method is to eliminate to improve
The tin coating weight deviation of tin plate edge and middle part, to tin coating weight >=2.8g/m2Thickness coating product have obvious effect.But in flash plating
Layer, especially tin amount is in 0.9~2.2g/m2Product on, since total current is smaller, the intensive influence of edge power line has
Limit, edge and middle part difference will not the table characteristic surface to tin plate significantly affect；This method is only through physical barriers and keeps away
The tin amount difference on macro position is exempted from, to microcosmic tin layers uniformity without any beneficial effect.
A kind of tin plating electricity of methyl sulfonate is mentioned in the Chinese patent application of Chinese patent application publication No. CN102162110 A
The tin plating method for solving liquid and steel band or steel plate, it to include first that it discloses a kind of methane sulfonic acid electrotinning formulas of good stability
Base sulfonic acid 30~120g/L of stannous, 60~180g/L of methane sulfonic acid, cerous sulfate 1~10g/L of phenol, 0.1~2g/L of antioxidant, light
Bright dose of 5~10g/L, 5~15g/L of surfactant, steel band or steel plate conveying speed are 3~9m/s when plating, and plating temperature is
15~60 DEG C, current density is 6~20A/dm2, degreasing is carried out to steel band or steel plate before plating and acid pre-pickling is handled, after plating
Strip or steel plate carry out soft heat, passivation and coating oiling post-processing.This method describes its plating process emphatically, is especially to provide
A kind of stability is good, and can be improved the electroplate liquid formulation and application method of tin coating brightness, corrosion resisting property and welding performance,
The composite coating properties evaluation result obtained to it and the requirement to tinning substrate do not carry out disclosure.But come from disclosed electroplate liquid formulation
It sees, each component concentration is higher, especially main salt concentration, and this kind of plating solution is more suitable for the plating of Gao Xiliang, is being used for 2.8g/m2Below
It is coarse that tin layers easily occur when coating, influence compactness of electroplating.
Summary of the invention
The object of the present invention is to provide a kind of flash plating cold rolling tin plate and its manufacturing methods, solve steel in the prior art
The tin plating layer weight of plate single side is 0.9~2.2g/m2The high technical problem of the tin plating layer porosity of cold rolling tin plate.
The technical solution adopted by the present invention is that:
A kind of flash plating cold rolling tin plate, the chemical component weight percentage of substrate are as follows: C:0.05%~0.10%, Si
≤ 0.04%, Mn:0.2%~0.4%, P≤0.02%, S≤0.02%, Alt:0.02%~0.05%, P≤0.004%%, N≤
0.0035%, surplus is Fe and inevitable impurity element.
A kind of manufacturing method of flash plating cold rolling tin plate, this method comprises:
Hard steel plate is rolled to the cold rolling with a thickness of 0.17~0.35mm and carries out vertical continuous annealing furnace annealing, smooth, scrub, electricity
The step of obtaining finished product, is batched in tin plating, soft heat, wherein
The chemical component weight percentage of hard steel plate is rolled in the cold rolling are as follows: C:0.05%~0.10%, Si≤0.04%, Mn:
0.2%~0.4%, P≤0.02%, S≤0.02%, Alt0.02%~0.05%, O≤0.004%%, N≤0.0035%, surplus be Fe and
Inevitable impurity element, lower yield strength RPLFor 750~850MPa；
The annealing temperature of the annealing steps is 550 DEG C~620 DEG C, and annealing time is 60s~120s；
The planarization step is that Stand Mill four-roller wet type is smooth, and working roll uses chrome-plated roller, and 1 rack working roll is using coarse
Degree is the electric spark texturing roller of Ra1.2~1.6um, and roll-force is 500~600t；2 rack working rolls use roughness for Ra0.3
The grinding-roller of~0.5um, roll-force are 300~450t, and smooth elongation percentage is 1%~2%；1 rack working roll and 2 in formation process
The leveling precision spray flow of rack working roll is 15~20L/min；
The scrub step is to scrub surface of steel plate with brush roll in 40~60 DEG C of demineralized waters；
The electrotinning step is low current density plating, using the methane sulfonic acid system of insoluble anode, Sn in plating solution2+It is dense
Spend 10~20g/L, methane sulfonic acid free acid concentration be 40~60mL/L, electroplating temperature be 40 DEG C~50 DEG C, current density be 8~
20A/dm2；
The reflow step combines soft heat with what induction reflow was combined for resistance reflow, and reflowing temperature is 260 DEG C~280
DEG C, Reflowing Time is 3~5s.
The reasons why production technology that the present invention takes, is as follows:
1, annealing temperature and annealing time setting
Recrystallization annealing primarily to eliminate cold-rolled process in generate processing hardening, all kinds of defects of crystals and
Anisotropy etc. in mechanical property, and the main recrystallization temperature for considering strip of the setting of annealing temperature and properties of product need
Ask, the present invention set cold rolling roll hard steel plate vertical continuous annealing furnace annealing (soaking zone) temperature range as 550 DEG C~620 DEG C,
Annealing time is 60s~120s.
2, flattening technological parameter is set
Cold rolling levelling technique is to carry out handling under minute-pressure to the steel band Jing Guo recrystallization annealing, and purpose has three: first is that passing through
The yield point elongation of carbon aluminium-killed steel is eliminated in the setting of smooth rate, guarantees the mouldability of material；Second is that improving steel plate after annealing
Template；Third is that giving roughness required by surface of steel plate by leveling roll.
The present invention is smooth using Stand Mill four-roller wet type, neatly controls the roughness of strip.Pass through repetition test and reason
It is found by analysis, the roughness of belt steel surface depends on the collective effect of planisher 1,2 racks, and strip will obtain suitable coarse
Degree, it is necessary to using texturing roller in such a way that grinding-roller combines；If can be obtained using only texturing roll strip higher coarse
Degree, it is unfavorable to the uniform fold of subsequent flash plating；Though using only the available suitable roughness of grinding-roller, surface of steel plate is complete
Portion is rendered as gully pattern caused by grinding-roller, causes steel plate rolling lines thicker, influences the beauty of tin graphed sheet.The present invention is through excessive
The experimental study in year, sets the electric spark texturing roller that 1 rack working roll uses roughness as Ra1.2~1.6um, roll-force is
500~600t；2 rack working rolls use roughness for the grinding-roller of Ra0.3~0.5um, and roll-force is 300~450t, smooth
Elongation percentage is 1%~2%, and smooth elongation percentage is 1%~2%.
Roller matching method described in the invention has to distribute with roll-force and be used in combination, and otherwise cannot reach of the invention
Effect, this is because planisher technique determines that the surface texture of tinning substrate, surface texture directly affect applying for thin layer of tin again
Plating process.In smooth theory, the surface texture of steel plate depends on roll replication rate, and replication rate mainly by roll pattern and rolls
Power processed influences.Applicant determines that under current parameter setting, the replication rate of leveling roll is likely to guarantee by test of many times
To most suitable surface texture.Otherwise, the pit pattern of the excessive then roller texturing of 1 rack replication rate is too deep, is producing low tin amount
Tin layers are difficult to cover pit and cause dew iron when coating, influence tin-plated board corrosion-resistance and brightness uniformity；Replication rate is too small then
Decline the RPC value of steel plate, the final adhesion for influencing tin plate and paint film.
The spray of above-mentioned leveling precision is also the key for completing the step, because wet jetting piles are big with no dust, rolling lubrication
Effect, make its than dry flat have more smooth, fine and smooth surface microstructure, and roll it is laborsaving, roller consumption it is low.The present invention will spray
Leaching flow restriction is because the flow of leveling precision directly affects planarization effects in 15~20L/min.Flow is excessive, rolling lubrication
Good, formation process easily occurs steel plate elongation percentage and leaps high and be broken, and causes fault in production；Flow is too small, and rolling lubrication is insufficient, smooth
Process roller consumption is high, increases cost and influences rhythm of production.
For the present invention using the leveling precision of model PTA-NS(M), leveling precision concentration is 2%.
3, parameter setting is scrubbed
The purpose of scrub is to completely remove foreign matter remaining between substrate surface profile.Wet jetting piles are deposited due to leveling precision
It is being easy to get to the surface of profile exquisiteness, but the presence of leveling precision also can be such that surface of steel plate organic substance residues increase, it is therefore necessary to
Scrub is introduced, cleans surface of steel plate deeper into ground using the mechanism of bristle.It is obtained by a large number of experiments verifying, water temperature 40~
Cleaning effect is best at 60 DEG C, and the residua content of surface of steel plate must reach 20mg/m after scrub2Below.
4, electrotinning parameter setting
The present invention be electroplated process of tin use insoluble anode, compare soluble anode, the long service life of insoluble anode,
Without frequently replacing, and Anode-cathode Distance is fixed, more advantageous to the uniformity of coating.
The present invention is electroplated using low current density, can effectively improve the uniformity of tin layers distribution, reduces uncoated dot.Electricity
Tin plating process nature is tin ion by the electro-deposition in iron matrix, and according to theory of electrodeposition, the tin ion in plating solution is deposited into
Metallic tin needs to undergo two processes of electrocrystallization forming core and nuclei growth, and electrocrystallization forming core is exactly divalent tin ion (Sn2+)
The belt steel surface for doing cathode obtains the process that electronics becomes metal tin atom (Sn).In multi-pass plating, belt steel surface is put
Electricity point is that nucleus growth point can change with the change of passage, fails to obtain the point of enough forming core energy at it in certain passage
His passage has an opportunity forming core again, to avoid the deposition of tin layers uneven.
Simultaneously as the good covering power of methane sulfonic acid plating solution and dispersibility, allow current density range wider,
Applicant confirms the Sn in plating solution under the bath system of methane sulfonic acid by repetition test2+10~20g/L of concentration, methane sulfonic acid
40~60mL/L of free acid concentration, 40~50 DEG C of electroplating temperature, current density is controlled in 8-20A/dm2, obtained metal electricity is heavy
Product particle is finer and close, uniform.
5, soft heat parameter setting
Joint soft heat refers to the soft heat mode that induction reflow and resistance reflow combine, and this method avoid pure resistance soft heats
The disadvantage that heating speed is slow, tin is oxidizable, but also with the fast advantage of pure induction reflow heating speed.
Melting temperatur and the time control be in order to ensure tin layers sufficiently melts and matrix surface formed flow metal layer,
The coating crystal grain gap generated in the plating process is filled and led up, while guaranteeing the suitable growth time of alloy-layer.Reflowing temperature is too low,
Metallic tin is not enough to melt, excessively high, can accelerate the oxidation of tin, brings other adverse consequences；Heating time is too short, can not be formed
Enough alloy tins, unfavorable with corrosion resistance, too long then pure stannum layer is reduced, and influences the welding of tank process processed.The present invention is by soft heat temperature
Between 260~280 DEG C, Reflowing Time was controlled at 3~5 seconds for degree control, both can get the tin ferroalloy of enough coarse densifications
Layer can retain enough pure stannum layers again, can meet the anti-corrosion needs with welding simultaneously.
The present invention obtain with a thickness of 0.17~0.35mm flash plating cold rolling tin plate, microscopic structure be ferrite and
Free cementite, grain size number are I8.5~I9.0 grades, lower yield strength RPLFor 300MPa~400MPa, tensile strength RmFor
350MPa~450MPa, elongation after fracture A50It is 20%~40%；The tin plating layer weight of steel plate single side is 0.9~2.2g/m2, unit plane
Tin coating weight difference≤0.2g/m in product2, alloy tin weight is 0.35~0.65g/m2, porosity≤9mgFe/dm2。
The present invention has following good effect compared with prior art:
1, the present invention passes through reasonable set flattening process, cleaning before copper plating, activation, low current density plating and soft heat hardening
Process combination produces the flash plating tin plate haveing excellent performance, tin amount difference≤0.2g/m in unit area2, coating uniformity is good.
2, the present invention can effectively solve the flash plating layer porosity height of existing methane sulfonic acid system, the problem of point rust easily occur,
Overcome again simultaneously traditional phenolsulfonic acid plant process not environmentally, the high problem of energy consumption.
3, implementation method of the present invention is easy, simple production process, and slightly improving in conventional Tin-Plating Production Line can be real
It is existing.
Detailed description of the invention
Attached drawing 1 is the microscope photo of the cold rolling tin plate metallographic structure of the embodiment of the present invention 1；
Attached drawing 2 is the stereoscan photograph of the cold rolling tin plate alloy tin pattern of the embodiment of the present invention 1.
Specific embodiment
Below with reference to Examples 1 to 4, the present invention will be further described.
Table 1 is the chemical component (by weight percentage) that hard steel plate is rolled in cold rolling of the embodiment of the present invention, and surplus is for Fe and not
It can avoid impurity.
The chemical component of hard steel plate, unit: weight percent are rolled in 1 cold rolling of the embodiment of the present invention of table
To above-mentioned with a thickness of 0.17~0.35mm, lower yield strength RPLHard steel plate progress is rolled for the cold rolling of 750~850MPa
Vertical continuous annealing furnace anneals, is smooth；Annealing process are as follows: steel plate is in annealing (soaking zone) temperature of vertical continuous annealing furnace
It 550 DEG C~620 DEG C, anneals (soaking zone) time are as follows: 60s~120s；Flattening process are as follows: it is smooth using Stand Mill four-roller wet type,
Working roll uses chrome-plated roller, and 1 rack working roll uses roughness for the electric spark texturing roller of Ra1.2~1.6um, and roll-force is
500~600t；2 rack working rolls use roughness for the grinding-roller of Ra0.3~0.5um, and roll-force is 300~450t, smooth
Elongation percentage is 1%~2%.Annealing, flattening process control parameter are shown in Table 2.
The annealing of 2 embodiment of the present invention of table, flattening process control parameter
Steel plate after smooth first carries out conventional alkali cleaning, then is scrubbed with 40~60 DEG C of demineralized water, and low electricity is then carried out
Current density plating, using the methane sulfonic acid system of insoluble anode, Sn in plating solution2+10~20g/L of concentration, methane sulfonic acid free acid are dense
Spend 40~60mL/L, 40~50 DEG C of electroplating temperature, current density 8-20A/dm2.Steel plate after electrotinning carry out joint soft heat,
Passivation, oiling batch to obtain finished product, and reflowing temperature controls between 260~280 DEG C, and Reflowing Time 3~5 seconds.Passivation and oiling
It is produced using technique identical with common cold rolling tin plate.Electrotinning, soft-melting process control parameter are shown in Table 3.
The electrotinning of the present invention of table 3, soft-melting process control parameter
Utilize flash plating cold rolling tin plate obtained by the above method.Referring to Fig. 1, the microscopic structure of cold rolling tin plate is
Ferrite and free cementite, grain size number are I8.5~I9.0 grades；Lower yield strength RPLFor 300MPa~400MPa, tension
Intensity RmFor 350MPa~450MPa, elongation after fracture A50It is 20%~40%；Tin plating of the steel plate layer alloy tin pattern is referring to fig. 2.
The cold rolling tin plate that the present invention is obtained is according to " GB/T228.1-2010 metal material stretching test the 1st
Point: room temperature test method " carry out tension test.The mechanical property of steel plate is shown in Table 4.
The mechanical property of 4 cold rolling tin plate of the embodiment of the present invention of table
Using cold rolling tin plate obtained by the above method tin coating alloy tin pattern referring to fig. 2.Cold rolling tin plate
The tin plating layer weight of single side is 0.9~2.2g/m2Tin plate, tin coating weight difference≤0.2g/m in unit area2, alloy tin amount exists
0.35~0.65g/m2, porosity≤9mgFe/dm2。
The cold rolling tin plate that the present invention is obtained is according to " GB/T1838-2008 ferrostan tin coating weight test side
Method " tin plating layer weight, alloy tin balance meassurement are carried out, ferroxyl test is carried out using spectrophotometry, the results are shown in Table 5.
The tin plating layer parameter of 5 cold rolling tin plate of the embodiment of the present invention of table
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (4)
1. a kind of flash plating cold rolling tin plate, which is characterized in that the chemical component quality hundred of the cold rolling tin plate substrate
Divide ratio are as follows: C:0.05%~0.10%, Si≤0.04%, Mn:0.2%~0.4%, P≤0.02%, S≤0.02%, Alt:
0.02%~0.05%, P≤0.004%%, N≤0.0035%, surplus are Fe and inevitable impurity element；The cold rolling
The tin plating layer weight of tin plate single side is 0.9~2.2g/m2, tin coating weight difference≤0.2g/m in unit area2, alloy tin weight is
0.35~0.65g/m2, porosity≤9mgFe/dm2；The microscopic structure of its 0.17mm~0.35mm thickness cold rolling tin plate is iron
Ferritic and free cementite, grain size number are I8.5~I9.0 grades, lower yield strength RPLFor 300MPa~400MPa, tension is strong
Spend RmFor 350MPa~450MPa, elongation after fracture A50It is 20%~40%.
2. a kind of manufacturing method of flash plating cold rolling tin plate, this method include rolling to a thickness of the cold rolling of 0.17~0.35mm
Hard steel plate carries out vertical continuous annealing furnace annealing, smooth, scrub, electrotinning, soft heat, batches the step of obtaining finished product, feature
It is, the chemical component weight percentage of hard steel plate is rolled in the cold rolling are as follows: C:0.05%~0.10%, Si≤0.04%, Mn:
0.2%~0.4%, P≤0.02%, S≤0.02%, Alt:0.02%~0.05%, P≤0.004%%, N≤0.0035%,
Surplus is Fe and inevitable impurity element, lower yield strength RPLFor 750~850MPa；The annealing temperature be 550 DEG C~
620 DEG C, annealing time is 60s~120s；The smooth elongation percentage of the planarization step cold-rolled steel sheet is 1%~2%；The scrub
Step is to scrub surface of steel plate with brush roll in 40~60 DEG C of demineralized waters；The electrotinning step is low current density plating, is adopted
With the methane sulfonic acid system of insoluble anode, Sn in plating solution2+10~20g/L of concentration, methane sulfonic acid free acid concentration are 40~60mL/
L, electroplating temperature are 40 DEG C~50 DEG C, and current density is 8~20A/dm2。
3. a kind of manufacturing method of flash plating cold rolling tin plate as claimed in claim 2, which is characterized in that the smooth step
Suddenly smooth for Stand Mill four-roller wet type, working roll uses chrome-plated roller, and 1 rack working roll uses roughness for Ra1.2~1.6um's
Electric spark texturing roller, roll-force are 500~600t；2 rack working rolls use roughness for the grinding-roller of Ra0.3~0.5um, roll
Power processed is 300~450t, and the leveling precision spray flow of 1 rack working roll and 2 rack working rolls is 15~20L/ in formation process
min。
4. a kind of manufacturing method of flash plating cold rolling tin plate as claimed in claim 2, which is characterized in that the soft heat step
Rapid to combine soft heat with what induction reflow was combined for resistance reflow, reflowing temperature is 260 DEG C~280 DEG C, Reflowing Time for 3~
5s。
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| CN107268049A (en) * | 2017-08-07 | 2017-10-20 | 尼尔金属(苏州)有限公司 | A kind of tin plating method on aluminium and aluminum alloy coiled materials |
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| CN110885999A (en) * | 2018-09-10 | 2020-03-17 | 上海梅山钢铁股份有限公司 | Chromic acid passivation method for cold-rolled electroplated tin steel plate |
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