CN107587095A - A kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning method - Google Patents

A kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning method Download PDF

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CN107587095A
CN107587095A CN201710952879.3A CN201710952879A CN107587095A CN 107587095 A CN107587095 A CN 107587095A CN 201710952879 A CN201710952879 A CN 201710952879A CN 107587095 A CN107587095 A CN 107587095A
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copper
alloy plate
tin
copper alloy
plate strip
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CN107587095B (en
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刘爱奎
刘栋
王世中
鲁长建
郭凯
柯希富
赵红生
孟凡俭
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Kai Meilong Precision Copper Strip (henan) Co Ltd
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Kai Meilong Precision Copper Strip (henan) Co Ltd
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Abstract

The invention discloses a kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning method, comprise the following steps:Ungrease treatment is carried out to copper and copper alloy plate strip using alkaline degreaser;Use H2SO4Pickling processes are carried out to strip;Activation process is carried out to strip using the solution that ammonium bromide, hydrogen bromide and other chemical agents form;Copper and copper alloy plate strip are preheated in drying/pre-add hot-zone, preheating temperature is 50 130 DEG C;Strip is introduced into the tin liquor groove of pure tin or sn-ag alloy, progress is tin plating, and tin plating temperature is 230 290 DEG C;Strip is introduced at air knife, thickness of coating is automatically controlled according to the strip thickness of preplating and predetermined thickness of coating, air knife;Strip is introduced into air cooling zone, 120 150 DEG C are fallen within the range of using wind cooling blower;Strip is introduced into the tank for filling deionized water or pure water, its temperature is dropped to 20 60 DEG C.Strip surface hot-dip tinning method provided by the invention, its step is reasonable, and the uniformity of copper coin belt surface tin layers has been effectively ensured, and improves tin plating quality.

Description

A kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning method
Technical field
The present invention relates to metal plate and belt to produce and process field, more particularly to a kind of environmentally friendly copper and the hot dipping of copper alloy plate strip surface Tin plating method.
Background technology
Tin plating copper plate/strip has a variety of good characteristics, prevent copper plate/strip be oxidized and the corruption by materials such as acidity, alkalescence Contact resistance in erosion, reduction electrical machine element and electronic component, in generation information technology industry, advanced track traffic, energy-conservation With being widely used and developing in new-energy automobile, electrical circuitry equipment industry, it is mainly used in large scale integrated circuit, highly dense Spend the manufacture of lead frame, high-end electronic component, accurate plug terminal.
At present, copper plate/strip electroplating surfaces with tin is generally divided into electrotinning and hot dipped tinning.Process of tin is electroplated compared with hot dipped tinning, Had the following disadvantages during copper plate/strip electrotinning:
(1)By then passing through the size of control electric current, the concentration of electrolyte determines the thickness of coating, causes copper coin belt surface to plate Layer thickness profile is uneven, and generally edge thickness is more than interior thickness.
(2)In electroplating process, whisker is easily formed, causes internal stress or tin layers inside coating to be present and sticks with parent metal Must be insecure, in turn result in the miniaturized electronic components short circuit accident using electrotinning copper plate/strip.Therefore, generally increase after plating A step heat treatment step is added to eliminate the internal stress of coating.
(3)At present, low production efficiency during copper plate/strip electrotinning, universal velocity are 40 ~ 50m/min;
(4)Electroplating bath components are complicated, containing substantial amounts of heavy metal, are not suitable for recycling.
In addition, existing hot dipped tinning technique, generally there is the thickness of two methods control coating:
(1)Control the soak time in tin liquor.Although the method can be corresponding by the engineer testing of early stage, each thickness of coating Process program, but it is rough be controlled, and cause thickness of coating not reach requirement or skewness;
(2)Machinery smears tin.Although the thickness of coating can be controlled by this technique, tin steel rider is being smeared using after a certain amount of, Steel roller faces easily accumulate scruff or damage, and then cause thickness of coating skewness or coating the defects of a large amount of to be present.In addition, Existing hot dipped tinning technique, can not meet high-speed and continuous produce, and cause hot dipped tinning copper plate/strip coil coil-diameter it is small, volume weight it is low, Low production efficiency.
The content of the invention
The purpose of the present invention is to be directed to above-mentioned technical problem, there is provided a kind of environmentally friendly copper and the hot-dip of copper alloy plate strip surface Tin method, its step is reasonable, effectively prevent the shortcomings that electroplating process of tin and existing hot dipped tinning technique, ensure that copper plate/strip table The uniformity of face tin layers, improve production efficiency and hot dipped tinning copper plate/strip coil coil-diameter and volume weight.
Technical scheme
In order to solve the above technical problems, a kind of environmentally friendly copper provided by the invention and copper alloy plate strip surface hot-dip tinning method, tool Body comprises the following steps:
S1, ungrease treatment is carried out to copper and copper alloy plate strip using alkaline degreaser, its concentration is 0.3-2%, temperature 30-90 ℃;
In this step, using alkaline degreaser ungrease treatment, except the greasy dirt on copper plate/strip surface, ensure that tin layers are equal during hot dipped tinning It is even, smooth.
S2, use H2SO4Pickling processes are carried out to copper and copper alloy plate strip, its concentration is 10-20%, temperature is 15-50 DEG C, Copper ion concentration is less than 40g/l;
In this step, pickling processes remove copper plate/strip surface scale, ensure that tin layers are uniform, smooth during hot dipped tinning.
S3, the solution formed using ammonium bromide, hydrogen bromide and other chemical agents are carried out at activation to copper and copper alloy plate strip Reason;
Before activation process, it is also necessary to carry out drying and processing to strip, it is 80 DEG C to keep drying temperature.Drying removes copper plate/strip The moisture content of remained on surface, ensure that tin layers are uniform, smooth during hot dipped tinning.Fluxing agent is submerged or sprays in copper coin belt surface to carry out Activation process, remove after step drying and processing in atmosphere again caused by oxide skin, while improve the leaching of tin liquor and copper strip surface Lubricant nature, ensure that tin layers are uniform, smooth during hot dipped tinning.
S4, copper and copper alloy plate strip are preheated in drying/pre-add hot-zone, preheating temperature is 50-130 DEG C;
Preheating process preheats copper strips while drying to fluxing agent, make during copper strips hot-dip surface adhered to one layer it is dry fluxing Agent, ensure that tin layers are uniform, smooth during hot dipped tinning.
S5, copper and copper alloy plate strip are introduced into the tin liquor groove of pure tin or sn-ag alloy, progress is tin plating, and tin plating temperature is 230-290℃;
S6, copper and copper alloy plate strip are introduced at air knife, according to the copper of preplating and copper alloy bare board tape thickness and predetermined coating Thickness, air knife automatically control thickness of coating;
S7, copper and copper alloy plate strip are introduced into cooling zone, fall within the range of 120-150 DEG C;Copper and copper alloy plate strip are introduced Fill pH value to be maintained in 15-50 DEG C of deionized water or the tank of pure water for 5.5-8.5, water temperature and carry out water cooling, make its temperature Degree drops to 20-60 DEG C;
The air-cooled band to after tin plating cools down, and avoids not solidified tin layers from being scratched;Water cooling enters one to the band after tin plating Step cooling, ensure the crystalline condition of tin layers.
S8, the copper after processing and copper alloy plate strip are introduced into thickness of coating measuring system, monitor thickness of coating automatically, and will As a result feed back at air knife, to correct air knife parameter, thickness of coating is reached pre-provisioning request.
In this step, different experiment curvs can be selected according to the species of alloy, detects thickness of coating;Pass through plating Layer automatic control system, ensure the thickness and surface quality situation of tin layers.
Further, the copper and copper alloy plate strip include the copper such as fine copper, high purity copper, bronze, brass and copper-nickel alloy and copper closes Golden plate band, its thickness are 0.1-1.5mm, and width is 150-370 mm.
Further, need to carry out cold rinse and Re Chong using rinse water after copper and copper alloy plate ungrease treatment and pickling processes Wash, cleaning water ph value is 1.5-8.5;During cold rinse, rinse water water temperature is 15-60 DEG C, and during heat flush, rinse water water temperature is 15- 90℃.Heat flush after ungrease treatment removes the degreasing agent of copper plate/strip remained on surface, ensure during hot dipped tinning tin layers uniformly, light It is sliding;Heat flush after pickling processes is finally cleaned to copper strip surface, ensure hot dipped tinning when tin layers it is uniform, it is smooth, without convex Rise or peeling.
Further, also needed between the cold rinse after copper and copper alloy plate pickling processes and heat flush process at polishing Reason, the water of water polishing is deionized water or pure water, and its pH value is maintained at 5-8.5, and it is 15-60 DEG C to keep water temperature;Polishing Polishing roll is abrasive material pin brush/nonwoven fabric brush roll, and its brush roll mesh number is 600-1000.Water polishing remove copper plate/strip surface scale and Impurity, ensure during hot dipped tinning tin layers it is uniform, it is smooth, without raised or peeling.
Further, in step S5, tin liquor is pure tin, and its main component is:99.90% tin, remaining is impurity;Tin liquor is Sn-ag alloy, its main component are:1.5-5.0% is silver-colored, remaining is tin.
Further, in step S6, the gases used compressed air for 100-800bar of air knife, the distance of air knife is 0.1- 50mm.Air knife system is control effectively, it is ensured that the thickness and surface quality situation of tin layers.
Further, tin-coated copper and copper alloy plate strip can include copper core layer, the signal bronze layer outside copper core layer, position Tin layers outside signal bronze sandwich layer, the signal bronze layer composition outside copper core layer can be mutually Cu6Sn5, outside copper core layer Signal bronze layer composition mutually can be Cu6Sn5、Cu3Sn:Sn=1:1。
Further, tin-coated copper and copper alloy plate strip include copper core layer, the copper and tin ag alloy layer outside copper core layer, are located at Tin layers outside signal bronze sandwich layer, the copper and tin ag alloy layer composition outside copper core layer is mutually Ag3Sn and Cu6Sn5Micro- mistake of composition Eutectic structure.
Further, in production process, the tension force of tin-coated copper and copper alloy plate strip is 5-100Mpa, tin-coated copper and copper alloy The speed of service 5-150m/min of strip.
Disclosed herein as well is a kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning production line, and it is an entirety Production line, it is characterised in that in the presence of uncoiler, preceding S rollers, rear S rollers and winder, it holds automatically for copper and copper alloy plate strip Processing step described in row claim 1.
Disclosed herein as well is a kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning production line, it includes degreasing pickling Clean line, hot-dip solder, it is characterised in that when perform claim requires the processing step described in 1, degreasing pickling line is set Independent uncoiler, preceding S rollers, rear S rollers and winder, hot-dip solder set independent uncoiler, preceding S rollers, rear S rollers and winding Machine.
Beneficial effect of the present invention:
A kind of environmentally friendly copper provided by the invention and copper alloy plate strip surface hot-dip tinning method, its step is reasonable, has with following Beneficial effect:
(1)The shortcomings that effectively prevent plating process of tin and existing hot dipped tinning technique, improve the matter of copper coin belt surface tin layers Amount;
(2)Can continuous production, centre occurs without interruption, improves production efficiency;
(3)Hot dipped tinning copper plate/strip coil coil-diameter is up to 1600mm or higher, volume weight up to 4t or higher, strip length up to up to ten thousand Rice is higher;
(4)Thickness and the distribution of coating can be accurately controlled by air knife system, ensure that the uniform of copper coin belt surface tin layers Property;
(5)Copper and copper alloy plate strip surface hot-dip tinning method and device described herein, meets the requirement of environmental protection.
Brief description of the drawings
By the detailed description made in conjunction with the following drawings, above-mentioned advantage of the invention will be apparent and be easier reason Solution, these accompanying drawings are simply schematical, are not intended to limit the present invention, wherein:
Fig. 1 is copper and copper alloy plate strip surface hot-dip tinning method flow diagram of the present invention.
Embodiment
With reference to specific embodiments and the drawings, the present invention is described in detail.
The embodiment recorded herein is specific embodiment of the invention, for illustrating the design of the present invention, It is explanatory and exemplary, should not be construed as the limitation to embodiment of the present invention and the scope of the invention.Except what is recorded herein Outside embodiment, those skilled in the art can also be based on the application claims and specification disclosure of that using aobvious and The other technical schemes being clear to, these technical schemes include any obvious using making for the embodiment to recording herein The technical scheme of substitutions and modifications.
As shown in figure 1, a kind of environmentally friendly copper provided by the invention and copper alloy plate strip surface hot-dip tinning method, are specifically included Following steps:
S1, ungrease treatment is carried out to copper and copper alloy plate strip using alkaline degreaser, its concentration is 0.3-2%, temperature 30-90 ℃;
In this step, using alkaline degreaser ungrease treatment, except the greasy dirt on copper plate/strip surface, ensure that tin layers are equal during hot dipped tinning It is even, smooth.
S2, use H2SO4Pickling processes are carried out to copper and copper alloy plate strip, its concentration is 10-20%, temperature is 15-50 DEG C, Copper ion concentration is less than 40g/l;
In this step, pickling processes remove copper plate/strip surface scale, ensure that tin layers are uniform, smooth during hot dipped tinning.
S3, the solution formed using ammonium bromide, hydrogen bromide and other chemical agents are carried out at activation to copper and copper alloy plate strip Reason;
Before activation process, it is also necessary to carry out drying and processing to strip, it is 80 DEG C to keep drying temperature.Drying removes copper plate/strip The moisture content of remained on surface, ensure that tin layers are uniform, smooth during hot dipped tinning.Fluxing agent is submerged or sprays in copper coin belt surface to carry out Activation process, remove after step drying and processing in atmosphere again caused by oxide skin, while improve the leaching of tin liquor and copper strip surface Lubricant nature, ensure that tin layers are uniform, smooth during hot dipped tinning.
S4, copper and copper alloy plate strip are preheated in drying/pre-add hot-zone, preheating temperature is 50-130 DEG C;
Preheating process preheats copper strips while drying to fluxing agent, make during copper strips hot-dip surface adhered to one layer it is dry fluxing Agent, ensure that tin layers are uniform, smooth during hot dipped tinning.
S5, copper and copper alloy plate strip are introduced into the tin liquor groove of pure tin or sn-ag alloy, progress is tin plating, and tin plating temperature is 230-290℃;
S6, copper and copper alloy plate strip are introduced at air knife, according to the copper of preplating and copper alloy bare board tape thickness and predetermined coating Thickness, air knife automatically control thickness of coating;
S7, copper and copper alloy plate strip are introduced into cooling zone, fall within the range of 120-150 DEG C;Copper and copper alloy plate strip are introduced Fill pH value to be maintained in 15-50 DEG C of deionized water or the tank of pure water for 5.5-8.5, water temperature and carry out water cooling, make its temperature Degree drops to 20-60 DEG C;
The air-cooled band to after tin plating cools down, and avoids not solidified tin layers from being scratched;Water cooling enters one to the band after tin plating Step cooling, ensure the crystalline condition of tin layers.
S8, the copper after processing and copper alloy plate strip are introduced into thickness of coating measuring system, monitor thickness of coating automatically, and will As a result feed back at air knife, to correct air knife parameter, thickness of coating is reached pre-provisioning request.
In this step, different experiment curvs can be selected according to the species of alloy, detects thickness of coating;Pass through plating Layer automatic control system, ensure the thickness and surface quality situation of tin layers.
Illustrate specific technical process with reference to embodiment.
Embodiment one:
A kind of production technology of environmentally friendly metal tape hot dipped tinning, comprises the following steps:
(1)Uncoiling, the C70250 copper alloy belts volume that the 0.1mm of preplating is thick, 370mm is wide is placed on uncoiler and unreeled.
(2)By step(1)Before C70250 copper alloy belts volume after processing is introduced into S rollers, retainer belt volume tension force is 15Mpa.
(3)Degreasing, to step(2)C70250 copper alloy belts volume after processing is lived using silicates and non-ionic surface Property agent composition alkaline degreaser carry out surface cleaning by degreasing, keep degreaser concentration be 1-2%, temperature be 50-80 DEG C.Pass through Step(3)The greasy dirt of copper coin belt surface is removed, ensures that tin layers are uniform, smooth during hot dipped tinning.
(4)Cold rinse, to step(3)Copper and copper alloy plate strip after processing are carried out cold using deionized water or pure water Rinse, holding cleaning water ph value is 7, water temperature is 40 DEG C.Pass through step(4)Cold rinse removes the degreasing agent of copper plate/strip remained on surface And greasy dirt, ensure that tin layers are uniform, smooth during hot dipped tinning.
(5)Heat flush, to step(4)C70250 copper alloy belts volume after processing is carried out using deionized water or pure water Heat flush, holding cleaning water ph value is 7, water temperature is 80 DEG C.Pass through step(5)Heat flush removes the degreasing of copper plate/strip remained on surface Agent, ensure that tin layers are uniform, smooth during hot dipped tinning.
(6)Pickling, to step(5)C70250 copper alloy belts volume after processing uses H2SO4Surface acid-washing is carried out, is kept H2SO4Concentration is 15%, temperature is 25-40 DEG C, copper ion concentration is less than 40g/l.
(7)Cold rinse, to step(6)C70250 copper alloy belts volume after processing is carried out using deionized water or pure water Cold rinse, holding cleaning water ph value is 7, water temperature is 40 DEG C.Step(7)Cold rinse removes copper plate/strip remained on surface acid solution, prevents Residual acid liquid corrosion copper strips causes tin plating infiltration incomplete.
(8)Polishing, to step(7)C70250 copper alloy belts volume after processing enters water-filling using deionized water or pure water Polishing, holding polishing water ph value is 7, water temperature is 40 DEG C.Pass through step(8)Water polishing removes copper plate/strip surface scale and miscellaneous Matter, ensure during hot dipped tinning tin layers it is uniform, it is smooth, without raised or peeling.
(9)Heat flush, to step(8)C70250 copper alloy belts volume after processing is carried out using deionized water or pure water Heat flush, holding cleaning water ph value is 7, water temperature is 80 DEG C.In addition, polishing roll is abrasive material pin brush/nonwoven fabric brush roll, its brush roll mesh Number is 600-1000.Step(9)Heat flush is finally cleaned to copper strip surface, ensure hot dipped tinning when tin layers it is uniform, it is smooth, Without raised or peeling.
(10)Drying, to step(9)C70250 copper alloy belts volume after processing carries out skin drying processing, keeps drying temperature Spend for 80 DEG C.Pass through step(10)Drying remove copper plate/strip remained on surface moisture content, ensure hot dipped tinning when tin layers uniformly, light It is sliding.
(11)Activation process, will be to step(10)C70250 copper alloy belts volume after processing is introduced by ammonium bromide, hydrogen bromide And in the fluxing agent groove of other chemical agent compositions, activation process is carried out to its surface.Pass through step(11)Soaked in copper coin belt surface Not or spray fluxing agent carries out activation process, removes step(10)Afterwards in atmosphere again caused by oxide skin, while improve tin The wellability of liquid and copper strip surface, ensure that tin layers are uniform, smooth during hot dipped tinning.
(12)Drying/preheating, by step(11)C70250 copper alloy belts volume after processing introduces drying/pre-add hot-zone, It is preheated, it is 50 DEG C to keep pre-heating temperature.Pass through step(12)Preheating, pre-add while drying to fluxing agent Hot copper strips, surface during copper strips hot-dip has been adhered to one layer of dry fluxing agent, ensure that tin layers are uniform, smooth during hot dipped tinning.
(13)It is tin plating, by step(12)C70250 copper alloy belts volume after processing, which is introduced into pure tin liquid bath, carries out tin plating, guarantor Tin liquor temperature is held as 265 DEG C.
(14)Coating controls, by step(13)C70250 copper alloy belts volume after processing is introduced at air knife, thick according to copper strips 0.1mm and 1 μm desired of thickness of coating are spent, holding air pressure is 800bar, the distance of air knife is 0.6mm.Pass through step (14)Air knife system is controlled, ensures the thickness and surface quality situation of tin layers.
(15)It is air-cooled, by step(14)C70250 copper alloy belts volume after processing introduces air cooling zone, drops its temperature To 120-150 DEG C, it is 500-1500r/min to keep cooling air rotating speed.Pass through step(15)The air-cooled band to after tin plating enters Row cooling, avoids not solidified tin layers from being scratched.
(16)Water cooling, by step(15)C70250 copper alloy belts volume after processing is introduced into tank, its temperature is dropped to 20- 60 DEG C, holding water cooling water ph value is 7, temperature is 40 DEG C.Pass through step(16)Water cooling further cools down to the band after tin plating, protects Demonstrate,prove the crystalline condition of tin layers.
(17)Coating detects, by step(16)C70250 copper alloy belts volume after processing introduces thickness of coating measuring system, Automatic monitoring thickness of coating, and result is fed back at air knife, to correct air knife parameter, thickness of coating is reached 1 μm.Pass through step Suddenly(17)Coating automatic control system, ensure the thickness and surface quality situation of tin layers.
(18)By step(17)After C70250 copper alloy belts volume after processing is introduced into S rollers, retainer belt volume tension force is 30Mpa。
(19)Oiling, by step(18)C70250 copper alloy belts volume after processing introduces oiling station, in its surface smear Low viscosity mineral oil.
(20)Winding, by step(19)C70250 copper alloy belts volume after processing, which is introduced on winder, to be wound, rolling speed For 130m/min.
The C70250 copper alloy tin-plating belts produced using the present embodiment, this kind of tin coating thickness are 1 μm, including copper core layer, Signal bronze layer outside copper core layer, the tin layers outside signal bronze sandwich layer, and the signal bronze layer composition outside copper core layer It is mutually Cu6Sn5、Cu3Sn:Sn=1:1.The tin layers surface is uniform, it is smooth, be more than 5 μm, contact impedance without whisker, crystallite dimension It is low, bending is excellent.
Embodiment two:
A kind of production technology of environmentally friendly metal tape hot dipped tinning, comprises the following steps:
(1)Uncoiling, the C42500 copper alloy belts volume that the 1.5mm of preplating is thick, 200mm is wide is placed on uncoiler and unreeled.
(2)By step(1)Before C42500 copper alloy belts volume after processing is introduced into S rollers, retainer belt volume tension force is 30Mpa.
(3)Degreasing, to step(2)C42500 copper alloy belts volume after processing is lived using silicates and non-ionic surface Property agent composition alkaline degreaser carry out surface cleaning by degreasing, keep degreaser concentration be 1-2%, temperature be 50-80 DEG C.Pass through Step(3)The greasy dirt of copper coin belt surface is removed, ensures that tin layers are uniform, smooth during hot dipped tinning.
(4)Cold rinse, to step(3)Copper and copper alloy plate strip after processing are carried out cold using deionized water or pure water Rinse, holding cleaning water ph value is 7, water temperature is 40 DEG C.
(5)Heat flush, to step(4)C42500 copper alloy belts volume after processing is carried out using deionized water or pure water Heat flush, holding cleaning water ph value is 7, water temperature is 80 DEG C.Pass through step(5)Heat flush removes the degreasing of copper plate/strip remained on surface Agent, ensure that tin layers are uniform, smooth during hot dipped tinning.
(6)Pickling, to step(5)C42500 copper alloy belts volume after processing uses H2SO4Surface acid-washing is carried out, is kept H2SO4Concentration is 15%, temperature is 25-40 DEG C, copper ion concentration is less than 40g/l.
(7)Cold rinse, to step(6)C42500 copper alloy belts volume after processing is carried out using deionized water or pure water Cold rinse, holding cleaning water ph value is 7, water temperature is 40 DEG C.
(8)Polishing, to step(7)C42500 copper alloy belts volume after processing enters water-filling using deionized water or pure water Polishing, holding polishing water ph value is 7, water temperature is 40 DEG C.Pass through step(8)Water polishing removes copper plate/strip surface scale and miscellaneous Matter, ensure during hot dipped tinning tin layers it is uniform, it is smooth, without raised or peeling.
(9)Heat flush, to step(8)C42500 copper alloy belts volume after processing is carried out using deionized water or pure water Heat flush, holding cleaning water ph value is 7, water temperature is 80 DEG C.In addition, polishing roll is abrasive material pin brush/nonwoven fabric brush roll, its brush roll mesh Number is 600-1000.Step(9)Heat flush is finally cleaned to copper strip surface, ensure hot dipped tinning when tin layers it is uniform, it is smooth, Without raised or peeling.
(10)Drying, to step(9)C42500 copper alloy belts volume after processing carries out skin drying processing, keeps drying temperature Spend for 80 DEG C.Pass through step(10)Drying remove copper plate/strip remained on surface moisture content, ensure hot dipped tinning when tin layers uniformly, light It is sliding.
(11)Activation process, will be to step(10)C42500 copper alloy belts volume after processing is introduced by ammonium bromide, hydrogen bromide And in the fluxing agent groove of other chemical agent compositions, activation process is carried out to its surface.Pass through step(11)Soaked in copper coin belt surface Not or spray fluxing agent carries out activation process, removes step(10)Afterwards in atmosphere again caused by oxide skin, while improve tin The wellability of liquid and copper strip surface, ensure that tin layers are uniform, smooth during hot dipped tinning.
(12)Drying/preheating, by step(11)C42500 copper alloy belts volume after processing introduces drying/pre-add hot-zone, It is preheated, it is 130 DEG C to keep pre-heating temperature.Pass through step(12)Preheating, it is pre- while drying to fluxing agent Heated Copper band, surface during copper strips hot-dip has been adhered to one layer of dry fluxing agent, ensure that tin layers are uniform, smooth during hot dipped tinning.
(13)It is tin plating, by step(12)C42500 copper alloy belts volume after processing, which is introduced into pure tin liquid bath, carries out tin plating, guarantor Tin liquor temperature is held as 245 DEG C.
(14)Coating controls, by step(13)C42500 copper alloy belts volume after processing is introduced at air knife, according to C51900 (QSn6-0.05)Bronze tape thickness 1.5mm and require 15 μm of thickness of coating, holdings air pressure be 100bar, air knife away from From for 25mm.Pass through step(14)Air knife system is controlled, ensures the thickness and surface quality situation of tin layers.
(15)It is air-cooled, by step(14)C42500 copper alloy belts volume after processing introduces air cooling zone, drops its temperature To 120-150 DEG C, it is 500-1500r/min to keep cooling air rotating speed.Pass through step(15)The air-cooled band to after tin plating enters Row cooling, avoids not solidified tin layers from being scratched.
(16)Water cooling, by step(15)C42500 copper alloy belts volume after processing is introduced into tank, its temperature is dropped to 20- 60 DEG C, holding water cooling water ph value is 7, temperature is 40 DEG C.Pass through step(16)Water cooling further cools down to the band after tin plating, protects Demonstrate,prove the crystalline condition of tin layers.
(17)Coating detects, by step(16)C42500 copper alloy belts volume after processing introduces thickness of coating measuring system, Automatic monitoring thickness of coating, and result is fed back at air knife, to correct air knife parameter, thickness of coating is reached 15 μm.Pass through Step(17)Coating automatic control system, ensure the thickness and surface quality situation of tin layers.
(18)By step(17)After C42500 copper alloy belts volume after processing is introduced into S rollers, retainer belt volume tension force is 100Mpa。
(19)Oiling, by step(18)C42500 copper alloy belts volume after processing introduces oiling station, in its surface smear Low viscosity mineral oil.
(20)Winding, by step(19)C42500 copper alloy belts volume after processing, which is introduced on winder, to be wound, rolling speed For 25m/min.
Rolled up using the C42500 copper alloy belts of the present embodiment production, this kind of tin coating thickness is 15 μm, including copper core layer, position In the signal bronze layer outside copper core layer, the tin layers outside signal bronze sandwich layer, and the signal bronze layer group outside copper core layer Cheng Xiangwei Cu6Sn5.The tin layers surface is uniform, it is smooth, without whisker, crystallite dimension are more than 5 μm, contact impedance is low, bending is excellent It is good.
Embodiment three:
A kind of production technology of environmentally friendly metal tape hot dipped tinning, comprises the following steps:
(1)Uncoiling, by the C10100 that the 1.2mm of preplating is thick, 370mm is wide(TU00)Copper strip roll is placed on uncoiler and put Volume.
(2)By step(1)C10100 after processing(TU00)Before copper strip roll is introduced into S rollers, retainer belt volume tension force is 20Mpa。
(3)Degreasing, to step(2)C10100 after processing(TU00)Copper strip roll uses silicates and non-ionic surface The alkaline degreaser of activating agent composition carries out surface cleaning by degreasing, and holding degreaser concentration is 1-2%, temperature is 50-80 DEG C.It is logical Cross step(3)The greasy dirt of copper coin belt surface is removed, ensures that tin layers are uniform, smooth during hot dipped tinning.
(4)Cold rinse, to step(3)Copper and copper alloy plate strip after processing are carried out cold using deionized water or pure water Rinse, holding cleaning water ph value is 7, water temperature is 40 DEG C.
(5)Heat flush, to step(4)C10100 after processing(TU00)Copper strip roll is entered using deionized water or pure water Row heat flush, holding cleaning water ph value is 7, water temperature is 80 DEG C.
(6)Pickling, to step(5)C10100 after processing(TU00)Copper strip roll uses H2SO4Surface acid-washing is carried out, is kept H2SO4Concentration is 15%, temperature is 15-40 DEG C, copper ion concentration is less than 40g/l.
(7)Cold rinse, to step(6)C10100 after processing(TU00)Copper strip roll is entered using deionized water or pure water Row cold rinse, holding cleaning water ph value is 7, water temperature is 40 DEG C.
(8)Polishing, to step(7)C10100 after processing(TU00)Copper strip roll is carried out using deionized water or pure water Water polishing, holding polishing water ph value is 7, water temperature is 40 DEG C.Pass through step(8)Water polishing removes copper plate/strip surface scale and miscellaneous Matter, ensure during hot dipped tinning tin layers it is uniform, it is smooth, without raised or peeling.
(9)Heat flush, to step(8)C10100 after processing(TU00)Copper strip roll is entered using deionized water or pure water Row heat flush, holding cleaning water ph value is 7, water temperature is 80 DEG C.In addition, polishing roll is abrasive material pin brush/nonwoven fabric brush roll, its brush roll Mesh number is 600-1000.Step(9)Heat flush is finally cleaned to copper strip surface, ensure hot dipped tinning when tin layers uniformly, light Slide, without raised or peeling.
(10)Drying, to step(9)C10100 after processing(TU00)Copper strip roll carries out skin drying processing, keeps drying Temperature is 80 DEG C.Pass through step(10)Drying remove copper plate/strip remained on surface moisture content, ensure hot dipped tinning when tin layers uniformly, light It is sliding.
(11)Activation process, will be to step(10)C10100 after processing(TU00)Copper strip roll is introduced by ammonium bromide, bromination In the fluxing agent groove of hydrogen and other chemical agents composition, activation process is carried out to its surface.Pass through step(11)In copper coin belt surface Submergence or spray fluxing agent carry out activation process, remove step(10)Afterwards in atmosphere again caused by oxide skin, improve simultaneously The wellability of tin liquor and copper strip surface, ensure that tin layers are uniform, smooth during hot dipped tinning.
(12)Drying/preheating, by step(11)C10100 after processing(TU00)Copper strip roll introduces drying/preheating Area, it is preheated, it is 90 DEG C to keep pre-heating temperature.Pass through step(12)Preheating, while drying to fluxing agent Copper strips is preheated, surface during copper strips hot-dip has been adhered to one layer of dry fluxing agent, ensures that tin layers are uniform, smooth during hot dipped tinning.
(13)It is tin plating, by step(12)C10100 after processing(TU00)Copper strip roll is introduced into sn-ag alloy liquid bath and plated Tin, it is 275 DEG C to keep tin liquor temperature.
(14)Coating controls, by step(13)C10100 after processing(TU00)Copper strip roll is introduced at air knife, foundation C10100(TU00)Copper strips thickness 1.2mm and 6 μm desired of thickness of coating, holding air pressure are 400bar, the distance of air knife For 15mm.Pass through step(14)Air knife system is controlled, ensures the thickness and surface quality situation of tin layers.
(15)It is air-cooled, by step(14)C10100 after processing(TU00)Copper strip roll introduces air cooling zone, makes its temperature 120-150 DEG C is dropped to, it is 500-1500r/min to keep cooling air rotating speed.Pass through step(15)The air-cooled band to after tin plating Cooled down, avoid not solidified tin layers from being scratched.
(16)Water cooling, by step(15)C10100 after processing(TU00)Copper strip roll is introduced into tank, drops to its temperature 20-60 DEG C, holding water cooling water ph value is 7, temperature is 40 DEG C.Pass through step(16)Water cooling is further cold to the band after tin plating But, the crystalline condition of tin layers is ensured.
(17)Coating detects, by step(16)C10100 after processing(TU00)Copper strip roll introduces thickness of coating measurement system System, monitors thickness of coating automatically, and result is fed back at air knife, to correct air knife parameter, thickness of coating is reached 6 μm.It is logical Cross step(17)Coating automatic control system, ensure the thickness and surface quality situation of tin layers.
(18)By step(17)C10100 after processing(TU00)After copper strip roll is introduced into S rollers, retainer belt volume tension force is 60Mpa。
(19)Oiling, by step(18)C10100 after processing(TU00)Copper strip roll introduces oiling station, is applied on its surface Smear low viscosity mineral oil.
(20)Winding, by step(19)C10100 after processing(TU00)Copper strip roll is introduced on winder and wound, winding speed Spend for 70m/min.
The C10100 produced using the present embodiment(TU00)Copper strip roll, this kind of tin coating thickness are 6 μm, including copper core layer, Copper and tin ag alloy layer outside copper core layer, the tin layers outside signal bronze sandwich layer, the copper and tin silver alloy outside copper core layer Micro- hypereutectic structure that layer composition mutually forms for Ag3Sn and Cu6Sn5.The tin layers surface is uniform, it is smooth, without whisker, crystal grain chi It is very little be more than 5 μm, contact impedance is low, bending is excellent.
The shortcomings that compared to prior art and deficiency, copper and copper alloy plate strip surface hot-dip tinning side provided by the invention Method, its step is reasonable, and the uniformity of copper coin belt surface tin layers has been effectively ensured, the defects of avoiding electrotinning.
The present invention is not limited to the above-described embodiments, and anyone can draw other various forms under the enlightenment of the present invention Product, it is every that there is technical side identical or similar to the present application however, make any change in its shape or structure Case, it is within the scope of the present invention.

Claims (11)

1. a kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning method, it is characterised in that comprise the following steps:
S1, ungrease treatment is carried out to copper and copper alloy plate strip using alkaline degreaser, its concentration is 0.3-2%, temperature 30-90 ℃;
S2, use H2SO4Pickling processes are carried out to copper and copper alloy plate strip, its concentration is 10-20%, temperature is 15-50 DEG C, copper from Sub- concentration is less than 40g/l;
S3, activation process is carried out to copper and copper alloy plate strip using the solution that ammonium bromide, hydrogen bromide and other chemical agents form;
S4, copper and copper alloy plate strip are preheated in drying/pre-add hot-zone, preheating temperature is 50-130 DEG C;
S5, copper and copper alloy plate strip are introduced into the tin liquor groove of pure tin or sn-ag alloy, progress is tin plating, and tin plating temperature is 230- 290℃;
S6, copper and copper alloy plate strip are introduced at air knife, according to the copper of preplating and copper alloy bare board tape thickness and predetermined coating Thickness, air knife automatically control thickness of coating;
S7, copper and copper alloy plate strip are introduced into cooling zone, fall within the range of 120-150 DEG C;Copper and copper alloy plate strip are introduced Fill pH value to be maintained in 15-50 DEG C of deionized water or the tank of pure water for 5.5-8.5, water temperature and carry out water cooling, make its temperature Degree drops to 20-60 DEG C;
S8, the copper after processing and copper alloy plate strip are introduced into thickness of coating measuring system, monitor thickness of coating automatically, and by result Feed back at air knife, to correct air knife parameter, thickness of coating is reached pre-provisioning request.
2. copper and copper alloy plate strip surface hot-dip tinning method according to claim 1, it is characterised in that the copper and copper close Golden plate band includes copper and the copper alloy plate strip such as fine copper, high purity copper, bronze, brass and copper-nickel alloy, and its thickness is 0.1-1.5mm, width For 150-370 mm.
3. copper and copper alloy plate strip surface hot-dip tinning method according to claim 1, it is characterised in that copper and copper alloy plate It is 1.5-8.5 to need to carry out cold rinse and heat flush, cleaning water ph value using rinse water after ungrease treatment and pickling processes;Cold rinse When, rinse water water temperature is 15-60 DEG C, and during heat flush, rinse water water temperature is 15-90 DEG C.
4. copper and copper alloy plate strip surface hot-dip tinning method according to claim 1, it is characterised in that copper and copper alloy plate Polishing is also needed between cold rinse and heat flush process after pickling processes, the water of water polishing is deionized water or pure Water, its pH value are maintained at 5-8.5, and it is 15-60 DEG C to keep water temperature;The polishing roll of polishing is abrasive material pin brush/nonwoven fabric brush roll, and it is brushed Roller mesh number is 600-1000.
5. copper and copper alloy plate strip surface hot-dip tinning method according to claim 4, it is characterised in that in step S5, tin Liquid is pure tin, and its main component is:99.90% tin, remaining is impurity;Tin liquor is sn-ag alloy, and its main component is:1.5- 5.0% silver medal, remaining be tin.
6. copper and copper alloy plate strip surface hot-dip tinning method according to claim 1, it is characterised in that in step S6, wind The gases used compressed air for 100-800bar of knife, the distance of air knife is 0.1-50mm.
7. copper and copper alloy plate strip surface hot-dip tinning method according to claim 1, it is characterised in that tin-coated copper and copper close Golden plate band can include copper core layer, the signal bronze layer outside copper core layer, the tin layers outside signal bronze sandwich layer, positioned at copper Signal bronze layer composition outside sandwich layer can be mutually Cu6Sn5, the signal bronze layer outside copper core layer, which forms, can be mutually Cu6Sn5、Cu3Sn:Sn=1:1。
8. copper and copper alloy plate strip surface hot-dip tinning method according to claim 1, it is characterised in that tin-coated copper and copper close Golden plate band includes copper core layer, the copper and tin ag alloy layer outside copper core layer, the tin layers outside signal bronze sandwich layer, positioned at copper core Micro- hypereutectic structure that copper and tin ag alloy layer composition outside layer mutually forms for Ag3Sn and Cu6Sn5.
9. copper and copper alloy plate strip surface hot-dip tinning method according to claim 1, it is characterised in that in production process, The tension force of tin-coated copper and copper alloy plate strip is 5-100Mpa, tin-coated copper and copper alloy plate strip speed of service 5-150m/min.
10. a kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning production line, it is the production line of an entirety, and its feature exists In copper and copper alloy plate strip are in the presence of uncoiler, preceding S rollers, rear S rollers and winder, described in its automatic perform claim requirement 1 Processing step.
11. a kind of environmentally friendly copper and copper alloy plate strip surface hot-dip tinning production line, it includes degreasing pickling line, hot dipped tinning Line, it is characterised in that during processing step described in perform claim requirement 1, degreasing pickling line sets independent uncoiler, preceding S rollers, rear S rollers and winder, hot-dip solder set independent uncoiler, preceding S rollers, rear S rollers and winder.
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CN108385049A (en) * 2018-01-18 2018-08-10 河南科技大学 A kind of copper and copper alloy plate strip surface hot-dip tinning technique
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CN110819926A (en) * 2019-11-15 2020-02-21 姚超 Tin immersion treatment process for producing and processing multi-strand copper core of automobile wire harness
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CN108385049A (en) * 2018-01-18 2018-08-10 河南科技大学 A kind of copper and copper alloy plate strip surface hot-dip tinning technique
CN108251777A (en) * 2018-01-18 2018-07-06 河南科技大学 A kind of copper alloy plate strip surface hot-dip tinning technique
CN109628870A (en) * 2019-01-22 2019-04-16 陶乐敏 A kind of environment-friendly type lead-free alloy material and its processing technology
CN110592515A (en) * 2019-09-30 2019-12-20 凯美龙精密铜板带(河南)有限公司 Hot-dip tinned copper material and manufacturing method thereof
CN110819926A (en) * 2019-11-15 2020-02-21 姚超 Tin immersion treatment process for producing and processing multi-strand copper core of automobile wire harness
CN111261317B (en) * 2020-04-09 2021-08-31 江东合金技术有限公司 Preparation method of high-performance antioxidant copper conductor material for special cable
CN111261317A (en) * 2020-04-09 2020-06-09 江东合金技术有限公司 High-performance antioxidant copper conductor material for special cable and preparation method thereof
CN113061827A (en) * 2021-02-25 2021-07-02 宁波博威合金板带有限公司 Hot-dip tinned silver alloy coating and preparation method and application thereof
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CN114395746A (en) * 2021-12-24 2022-04-26 安徽鑫科铜业有限公司 High-quality surface treatment method for hot-dipped tin copper strip and hot-dipped tin copper strip
CN114790550A (en) * 2022-05-07 2022-07-26 云南驰宏资源综合利用有限公司 Method for manufacturing anode beam
CN114790550B (en) * 2022-05-07 2024-08-02 云南驰宏资源综合利用有限公司 Manufacturing method of anode beam
CN115044801A (en) * 2022-08-16 2022-09-13 凯美龙精密铜板带(河南)有限公司 Copper-nickel-silicon alloy strip and preparation method thereof

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