CN104805484A - Production method for Cu-Ni/Ni-Ag double-composite coating extra-thin steel strip - Google Patents
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Abstract
The invention discloses a production method for a Cu-Ni/Ni-Ag double-composite coating extra-thin steel strip. The production method comprises the following steps of performing primary cold rolling on an SPHC hot rolled coil subjected to acid pickling; after conventional degreasing is finished, performing primary annealing; performing secondary cold rolling; performing conventional degreasing and coiling; preparing a strip; uncoiling, striping and removing burrs; electroplating Cu-Ni; performing primary conventional washing and drying; performing thermal spraying on Ni-Ag; performing secondary conventional washing and drying; performing secondary annealing; naturally cooling to room temperature and then coiling. According to the product disclosed by the production method disclosed by the invention, the tensile strength is 330 to 380MPa, and the elongation is 34 to 38 percent; a layer of Cu-Ni/Ni-Ag double-composite coating with uniformity, compactness and high adhesive force is generated on the surface of the product; the surface hardness of the coating is 90 to 100HV, the roughness of the coating is 0.15 to 0.30 mu m, the mirror reflectivity is 88 to 95 percent, the resistivity is 6.5 to 8.7 mu omega cm, and the thermal conductivity is 6 to 10W/cm DEG C. The problems of high cost, great waste, serious pollution and low efficiency caused by a traditional process are solved.
Description
Technical field
The present invention relates to a kind of production method of steel band, belong to the production method of the two very thin steel band of composite deposite of a kind of Cu-Ni/Ni-Ag particularly.
Background technology
Very thin plating Ag steel band has thinner thickness, excellent surface property, conductivity and heat conductivility due to it, and be widely used in opto-electronic industry, in order to produce precise electronic components and parts and opticinstrument component, market demand is very big.
At present, produce plating Ag steel band mainly at the plating of Cold-strip Steel Surface contiguous segmentation Cu, Ni, Ag monometallic, form traditional Cu-Ni-Ag composite deposite.Although this process history is long, there is several insoluble problem in it, that is: one be this coating take Cu as substrate, is easily oxidized, causes the stability of coating to decline.In addition, once corrosive medium passes through crackle and the pin hole of Ag layer, the hole through Ni and Cu arrives Fe matrix, because Fe matrix is the anode of corrosion galvanic couple, will soon corrodes and occur rust spot; Two is if adopt continuous electroplating, in the process of plating Ag, needs to use the prussiate of severe toxicity to cook electroplate liquid, causes serious environment pollution; Three be steel band after continuous electroplating, surface easily passivation, the more difficult control of over-all properties of gained composite deposite; Four is that continuous electroplating process causes production energy consumption comparatively large, and waste liquid is more.Need in particularly producing to use a large amount of noble metal Ni and Ag, production cost is quite high.
Publication number is the Chinese patent of CN104195607A, discloses a kind of manufacture method of tin copper double-layer electroplating steel plate.Its technical scheme mainly comprises the steps: to be eliminated rust by Cold Rolled Sheet Steel, clean, nickel is soaked at steel strip surface chemistry again with after diluted acid activation, then electro-coppering successively, eleetrotinplate, carry out soft heat, hardening, soda cleaning, the passivation of chromic salt negative electrode subsequently, clean, dry up after finished product, gained tin copper double-layer electroplating steel plate has excellent welding property and corrosion resisting property.But this Coated Steel, mainly for the production of food cans and beverages can, due to the composite deposite not containing Ag in steel band, causes the surface property of product, conductivity and heat conductivility can not meet the requirement of opto-electronic industry.
Publication number is the Chinese patent of CN101619474B, discloses a kind of manufacture method of zinc-nickel double-layer electroplating steel plate.Its technical scheme mainly comprises the steps: cold-rolled steel sheet is carried out processing of rust removing or hot-rolled steel sheet is carried out de-scaling process, washes, then with diluted acid activation, then carries out electronickelling at surface of steel plate.Under hydrogen or nitrogen protection atmosphere, anneal is carried out to steel plate subsequently, form Rhometal layer at surface of steel plate, then zinc-plated in Rhometal layer surface electrical.After zinc-plated end, wash steel plate, obtain finished product, the corrosion resisting property of gained zinc-nickel double-layer electroplating steel plate has and significantly improves, and solves the bonding force problem of coating and matrix simultaneously.But this Coated Steel, mainly for the manufacture of automobile and household electrical appliance outside plate, due to the composite deposite not containing Ag in steel band, causes the surface property of product, conductivity and heat conductivility can not meet the requirement of opto-electronic industry.
Publication number is the Chinese patent of CN102206842B, discloses a kind of manufacture method of zinc/tin double-layer electroplated steel plate.Its technical scheme mainly comprises the steps: low-carbon cold rolling steel plate to be carried out pickling, rust cleaning, degreasing, clean process, and activates with diluted acid.Electro-galvanizing is carried out to the steel plate after activation, washes again after completing.Carry out eleetrotinplate subsequently, again wash after completing.Then with resistance reflow stove, soft heat, hardening, soda cleaning, the passivation of chromic salt negative electrode are carried out to tin plate, after completing, zinc/tin double-layer electroplated steel plate is washed, dried up, obtain finished product.But this Coated Steel is mainly for the production of food cans and beverages can.Due to the composite deposite not containing Ag in steel band, cause the surface property of product, conductivity and heat conductivility can not meet the requirement of opto-electronic industry.
Publication number is the Chinese patent of CN101922031B, discloses a kind of manufacture method of double-plating steel belt, mainly after cleaning steel is clean, and re-plating nickel after first ferro-nickel alloy electroplating.Solve on steel band and plate the problem that pure-nickel-layer cost is high, anti-corrosion capability is poor, the two Coated Steel of gained is mainly for the manufacture of electrode.But, due to the composite deposite not containing Ag in steel band, cause the surface property of product, conductivity and heat conductivility can not meet the requirement of opto-electronic industry.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, provide a kind of and there is excellent surface property, conductivity and heat conductivility, meet the two very thin steel band of composite deposite of Cu-Ni/Ni-Ag and the production method of opto-electronic industry requirement completely.
Realize the measure of above-mentioned purpose:
A production method for the two very thin steel band of composite deposite of Cu-Ni/Ni-Ag, its step:
1) carry out first time to the SPHC hot rolled coil after pickling cold rolling, 8 passes, it is 80 ~ 88% that cold rolling total reduction controls;
2), after conventional degreasing, under perhydro protective atmosphere, carry out first time annealing, it is 690 ~ 730 ° of C that annealing temperature controls, and it is 20 ~ 30 min that soaking time controls;
3) carry out second time cold rolling and be rolled to product thickness, 4 passes, it is 40 ~ 67% that cold rolling total reduction controls;
4) carry out conventional degreasing and batch;
5) system band is carried out:
A, uncoiling, itemize fin cutting;
B, plating Cu-Ni, electroplate liquid is CuSO
4+ NiSO
4acidic aqueous solution, it is 20 ~ 30 ° of C that electroplating temperature controls;
C, carry out first time conventional water wash and dry to steel strip surface without moisture;
D, thermospray Ni-Ag, particle diameter is that Ni and the Ag concentration ratio of 0.5 ~ 0.8 μm controls to be 0.3 ~ 0.5:1, and it is 500 ~ 700 m/s that spraying rate controls, and it is 0.4 ~ 0.6 kg/h that deposition controls;
E, carry out second time conventional water wash and dry to steel strip surface without moisture;
F, carry out under perhydro protective atmosphere second time annealing, annealing temperature control be 450 ~ 500 ° of C, soaking time control be 25 ~ 35 min;
Batch after G, natural air cooling to room temperature.
It is: CuSO
4and NiSO
4concentration ratio be 3:0.95 ~ 1.05, current density is 4.5 ~ 6.5 A/dm
2.
It is: particle diameter is that Ni and the Ag powder of 0.5 ~ 0.8 μm will mix.
For existing technique Problems existing, the present invention is by lot of experiments and research, propose a kind of new thinking, namely adopt common SPHC hot rolling acid-cleaning volume as raw material base, adopt the technique of secondary cold-rolling+Cu-Ni+ thermospray Ni-Ag+ second annealing of once annealing+electroplate to produce.Its feature: one is using common carbon steel SPHC as raw material steel grade, both can ensure the mechanical property of product, can reduce raw materials cost again; Two is by secondary cold-rolling+once anneal, and can ensure thickness and the mechanical property of cold rolling feeds; Three is the effects giving full play to Ni, and the Ni coating design in the middle of traditional C u-Ni-Ag composite deposite is divided into two portions, namely first on base steel, electroplates one deck Cu-Ni alloy to replace Cu metal single layer on the one hand, obviously can strengthen corrosion resisting property and the stability of substrate; On the other hand, carry out replacing electroplating Ni+ with thermospray Ni-Ag and electroplate Ag, without the need to using the prussiate of severe toxicity, protecting environment, and decreasing technical process, improve working efficiency.Compared with continuous electroplating, thermal spray process speed is fast, wastage of material is few, and production cost is lower, thickness of coating controllable precise.In addition, relative to Ag metal single layer, Ni-Ag alloy had both enhanced electroconductibility and the thermal conductivity of coating, turn improved the glossiness of coating; Four is after thermospray completes, and carries out second time anneal, and it both can regulate the mechanical property of product, reduce the internal stress of coating, by oxide removal remaining for coating surface, the surface smoothness of coating can be ensured again, the alloying process of coating can also be promoted, improve the surface property of coating.
Compared with existing ordinary steel belts, the product that the present invention produces, its thickness is 0.2 ~ 0.3 mm, and tensile strength is 330 ~ 380 MPa, and unit elongation is 34 ~ 38%; Surface Creation one deck even compact, strong adhesion, thickness are the two composite deposite of Cu-Ni/Ni-Ag of 7 ~ 10 μm, coating surface hardness is 90 ~ 100 HV, roughness is 0.15 ~ 0.30 μm, specular reflectance is 88 ~ 95%, resistivity is 6.5 ~ 8.7 μ Ω cm, and thermal conductivity is 6 ~ 10 W/cm ° C.The surface property of product, conductivity and heat conductivility are good, meet the requirement of opto-electronic industry completely.After particularly adopting plating Cu-Ni+ thermospray Ni-Ag technique, solve traditional technology produces that the cost brought is high, waste is large, pollute weigh, inefficient problem.
Embodiment
Below the present invention is described in detail:
Table 1 is the cold-rolling process parameter list of various embodiments of the present invention and comparative example;
Table 2 is the belt making process parameter list of various embodiments of the present invention and comparative example;
Table 3 is the product performance list of various embodiments of the present invention and comparative example.
Various embodiments of the present invention are produced all in accordance with the following steps:
1) carry out first time to the SPHC hot rolled coil after pickling cold rolling, 8 passes, it is 80 ~ 88% that cold rolling total reduction controls;
2), after conventional degreasing, under perhydro protective atmosphere, carry out first time annealing, it is 690 ~ 730 ° of C that annealing temperature controls, and it is 20 ~ 30 min that soaking time controls;
3) carry out second time cold rolling and be rolled to product thickness, 4 passes, it is 40 ~ 67% that cold rolling total reduction controls;
4) carry out conventional degreasing and batch;
5) system band is carried out:
A, uncoiling, itemize fin cutting;
B, plating Cu-Ni, electroplate liquid is CuSO
4+ NiSO
4acidic aqueous solution, it is 20 ~ 30 ° of C that electroplating temperature controls;
C, carry out first time conventional water wash and dry to steel strip surface without moisture;
D, thermospray Ni-Ag, particle diameter is that Ni and the Ag concentration ratio of 0.5 ~ 0.8 μm controls to be 0.3 ~ 0.5:1, and it is 500 ~ 700 m/s that spraying rate controls, and it is 0.4 ~ 0.6 kg/h that deposition controls;
E, carry out second time conventional water wash and dry to steel strip surface without moisture;
F, carry out under perhydro protective atmosphere second time annealing, annealing temperature control be 450 ~ 500 ° of C, soaking time control be 25 ~ 35 min;
Batch after G, natural air cooling to room temperature.
It is: CuSO
4and NiSO
4concentration ratio be 3:0.95 ~ 1.05, current density is 4.5 ~ 6.5 A/dm
2.
It is: particle diameter is that Ni and the Ag powder of 0.5 ~ 0.8 μm will mix.
The product thickness that following embodiment is produced is within the scope of 0.20 ~ 0.30 mm.
The cold-rolling process parameter list of table 1 various embodiments of the present invention and comparative example
The belt making process parameter list of table 2 various embodiments of the present invention and comparative example
The product performance list of table 3 various embodiments of the present invention and comparative example
As can be seen from Table 3, the steel band of the present patent application, its thickness is 0.2 ~ 0.3 mm; Tensile strength is 330 ~ 380 MPa; Unit elongation is 34 ~ 38%; Surface Creation one deck even compact, strong adhesion, thickness are the two composite deposite of Cu-Ni/Ni-Ag of 7 ~ 10 μm; Coating surface hardness is 90 ~ 100 HV; Roughness is 0.15 ~ 0.30 μm; Specular reflectance is 88 ~ 95%; Resistivity is 6.5 ~ 8.7 μ Ω cm; Thermal conductivity is 6 ~ 10 W/cm ° C.The surface property of product, conductivity and heat conductivility are good, meet the requirement of opto-electronic industry completely.
Above-described embodiment is only the best and exemplifies, and is not the restriction to embodiments of the present invention.
Claims (3)
1. a production method for the two very thin steel band of composite deposite of Cu-Ni/Ni-Ag, its step:
1) carry out first time to the SPHC hot rolled coil after pickling cold rolling, 8 passes, it is 80 ~ 88% that cold rolling total reduction controls;
2), after conventional degreasing, under perhydro protective atmosphere, carry out first time annealing, it is 690 ~ 730 ° of C that annealing temperature controls, and it is 20 ~ 30 min that soaking time controls;
3) carry out second time cold rolling and be rolled to product thickness, 4 passes, it is 40 ~ 67% that cold rolling total reduction controls;
4) carry out conventional degreasing and batch;
5) system band is carried out:
A, uncoiling, itemize fin cutting;
B, plating Cu-Ni, electroplate liquid is CuSO
4+ NiSO
4acidic aqueous solution, it is 20 ~ 30 ° of C that electroplating temperature controls;
C, carry out first time conventional water wash and dry to steel strip surface without moisture;
D, thermospray Ni-Ag, particle diameter is that Ni and the Ag concentration ratio of 0.5 ~ 0.8 μm controls to be 0.3 ~ 0.5:1, and it is 500 ~ 700 m/s that spraying rate controls, and it is 0.4 ~ 0.6 kg/h that deposition controls;
E, carry out second time conventional water wash and dry to steel strip surface without moisture;
F, carry out under perhydro protective atmosphere second time annealing, annealing temperature control be 450 ~ 500 ° of C, soaking time control be 25 ~ 35 min;
Batch after G, natural air cooling to room temperature.
2. the production method of the two very thin steel band of composite deposite of a kind of Cu-Ni/Ni-Ag as claimed in claim 1, is characterized in that: CuSO
4and NiSO
4concentration ratio be 3:0.95 ~ 1.05, current density is 4.5 ~ 6.5 A/dm
2.
3. the production method of the two very thin steel band of composite deposite of a kind of Cu-Ni/Ni-Ag as claimed in claim 1, is characterized in that: particle diameter is that Ni and the Ag powder of 0.5 ~ 0.8 μm will mix.
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Cited By (9)
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|---|---|---|---|---|
| CN105063620A (en) * | 2015-08-07 | 2015-11-18 | 武汉钢铁(集团)公司 | Production method of Zn/Cu-Ag/Cu-Au composite coating steel band for photoelectric material |
| CN105154933A (en) * | 2015-08-21 | 2015-12-16 | 无锡桥阳机械制造有限公司 | Nickel silver alloy electroplate liquid and electroplating method thereof |
| CN105887085A (en) * | 2016-04-22 | 2016-08-24 | 武汉钢铁股份有限公司 | Production method of ultra-thin steel belt plated with precious metal |
| CN105887146A (en) * | 2016-04-22 | 2016-08-24 | 武汉钢铁股份有限公司 | Production method of plating steel belt for household gas wares |
| CN105887145A (en) * | 2016-04-22 | 2016-08-24 | 武汉钢铁股份有限公司 | Production method of composite plating steel belt for transmission machinery parts |
| CN105925775A (en) * | 2016-07-08 | 2016-09-07 | 武汉钢铁股份有限公司 | Production method of corrosion-resistance decorative composite plating steel strip of which thickness is less than or equal to 0.1mm |
| CN108198762A (en) * | 2017-12-29 | 2018-06-22 | 广东禾木科技有限公司 | A kind of preparation method of double coating bonding brass wires |
| US20200032374A1 (en) * | 2017-03-22 | 2020-01-30 | Jx Nippon Mining & Metals Corporation | Copper alloy strip exhibiting improved dimensional accuracy after press-working |
| CN111304654A (en) * | 2020-04-10 | 2020-06-19 | 扬州工业职业技术学院 | Method for plating platinum on surface of steel strip |
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| CN105063620A (en) * | 2015-08-07 | 2015-11-18 | 武汉钢铁(集团)公司 | Production method of Zn/Cu-Ag/Cu-Au composite coating steel band for photoelectric material |
| CN105154933A (en) * | 2015-08-21 | 2015-12-16 | 无锡桥阳机械制造有限公司 | Nickel silver alloy electroplate liquid and electroplating method thereof |
| CN105887085A (en) * | 2016-04-22 | 2016-08-24 | 武汉钢铁股份有限公司 | Production method of ultra-thin steel belt plated with precious metal |
| CN105887146A (en) * | 2016-04-22 | 2016-08-24 | 武汉钢铁股份有限公司 | Production method of plating steel belt for household gas wares |
| CN105887145A (en) * | 2016-04-22 | 2016-08-24 | 武汉钢铁股份有限公司 | Production method of composite plating steel belt for transmission machinery parts |
| CN105887145B (en) * | 2016-04-22 | 2018-03-16 | 武汉钢铁有限公司 | A kind of production method of gearing parts composite deposite steel band |
| CN105925775A (en) * | 2016-07-08 | 2016-09-07 | 武汉钢铁股份有限公司 | Production method of corrosion-resistance decorative composite plating steel strip of which thickness is less than or equal to 0.1mm |
| US20200032374A1 (en) * | 2017-03-22 | 2020-01-30 | Jx Nippon Mining & Metals Corporation | Copper alloy strip exhibiting improved dimensional accuracy after press-working |
| US11499207B2 (en) * | 2017-03-22 | 2022-11-15 | Jx Nippon Mining & Metals Corporation | Copper alloy strip exhibiting improved dimensional accuracy after press-working |
| CN108198762A (en) * | 2017-12-29 | 2018-06-22 | 广东禾木科技有限公司 | A kind of preparation method of double coating bonding brass wires |
| CN111304654A (en) * | 2020-04-10 | 2020-06-19 | 扬州工业职业技术学院 | Method for plating platinum on surface of steel strip |
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