CN101637989B - Hard or half-hard thin copper-clad steel band and preparation method thereof - Google Patents
Hard or half-hard thin copper-clad steel band and preparation method thereof Download PDFInfo
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- CN101637989B CN101637989B CN 200810135406 CN200810135406A CN101637989B CN 101637989 B CN101637989 B CN 101637989B CN 200810135406 CN200810135406 CN 200810135406 CN 200810135406 A CN200810135406 A CN 200810135406A CN 101637989 B CN101637989 B CN 101637989B
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- steel band
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Abstract
The invention discloses a hard or half-hard thin copper-clad steel band and a preparation method thereof. The hard or half-hard thin copper-clad steel band comprises two layers of copper bands and a layer of steel band, wherein the steel band is sandwiched between the two layers of copper bands; and the HV hardness is between 130 and 220. The invention also discloses a preparation method for the hard or half-hard thin copper-clad steel band. The hard or half-hard thin copper-clad steel band is mainly applied in the field low-voltage electricity and to elastic connectors of IT products such as computers and mobile phones.
Description
Technical field
The present invention relates to the metal material technical field, specifically, is a kind of hard attitude or the thin copper-clad steel band of half-hard state and preparation method thereof.
Background technology
At present, the major way of domestic production metallic composite product has plate hot rolling method, powder metallurgy sintered method, cold rolling composite algorithm and explosion composite algorithm.What domestic larger 2～3 copper clad steel manufacturers used is all the plate hot rolling method of introducing from the former Soviet Union sixties in last century, and technique falls behind, and poor product quality can't be carried out belt production, and product is mainly used in war production.Cold rolling compound high to equipment and material surface requirement, the present domestic specialized factory that does not produce copper clad steel.The joint product that powder metallurgy and blasting procedure are produced, the thickness evenness of composite effect and composite bed is poor.
Summary of the invention
The present invention has overcome above-mentioned shortcoming, has proposed a kind of hard attitude or the thin copper-clad steel band of half-hard state.
In order to realize goal of the invention, the present invention by the following technical solutions:
A kind of hard attitude or the thin copper-clad steel band of half-hard state are laminated with by accompanying one deck steel band in the middle of two-layer copper strips, and HV hardness is 130～220.The HV hardness of the thin copper-clad steel band of half-hard state is 130～170, and the hard thin copper-clad steel band of attitude is 170～220.
The inventor has also found above-mentioned hard attitude or the preparation method of the thin copper-clad steel band of half-hard state, adopts following steps:
A. with the steel band pickling, and with the steel band scratch brushing after pickling;
B. with washing copper strips;
C. steel band and copper strips are carried out CA compound;
D. the compound of step C gained is carried out cold thick and intermediate annealing repeatedly; Described is repeatedly 3～5 times.
E. the product with step D gained makes after finish rolling, cleaning, itemize, finished products.
Described pickling is to adopt 8～15wt% hydrochloric acid, 50～70 ℃ of temperature, pickling time 2～5 minutes.Utral degreaser is C preferably
9H
19C
6H
5O (CH
2CH
2O)
10H。
The compound controlled atmosphere bonded that refers to of CA is by a kind of two-layer of U.S. PMC company invention or hot rolling multiple layer metal is compound.In the CA recombination process; (roll is made electronegative potential to material that will be compound itself as resistance; high potential according to the difference of material, mill speed and concrete the setting) carry out self-heating; oxidation again in the heating process; the protective atmosphere chamber of certain-length is set according to the difference of heating-up temperature; indoor logical a certain proportion of nitrogen and decomposed ammonia, the ratio of two kinds of atmosphere are according to the difference of temperature, material and surface treatment situation and adjustable.Under the protection of protection gas, heated two or more materials combine with atomic force under the roll-force effect of milling train, thereby become a kind of novel composite.
Copper clad steel made-up belt after hot rolling, plate shape, thickness and performance etc. all can not meet the demands, and need to roll and cold finish rolling processing in thick by cold.The attenuate of generally the hot rolling base being tried one's best, first cold rolling rolling process of revising simultaneously plate shape and dimensional accuracy are called and coldly roll in thick.Rolling copper-clad steel band after work hardening in thick after intermediate annealing is softening, carry out finish rolling, is mainly in order to obtain higher dimensional accuracy and plate shape, to lay a solid foundation for properties of product control simultaneously.
An intermediate annealing: generally adopt continuous bright annealing furnace, according to the difference of material, thickness and requirement, annealing temperature is generally 750～850 ℃, and tape running speed is at 2～3.5m/min.
Secondary intermediate annealing: generally adopt circular bright cover type annealing stove, according to the difference that material, thickness and volume heavily wait, annealing temperature is 650～710 ℃, and temperature retention time is 5～10h.
So-called cold rolling hot rolling is Essential Terms in materials processing, generally rolling more than recrystallization temperature is called hot rolling, and is called being rolled into below recrystallization temperature cold rolling.Recrystallization temperature is not a definite value, but a scope, though the difference of material and working modulus and changing, the inventor fixes on hot-rolled temperature more than 650 ℃.At normal temperatures rolling of general steel is all cold rolling.
Hard attitude copper-clad steel band basic unit's steel band main chemical compositions (percentage by weight) of gained:
C：≤0.25％ Mn：0.35～0.55％ Cr：≤0.15％
S：≤0.03％ P：≤0.03％ Si：≤0.06％
The thin copper-clad steel band product of the hard attitude of gained or half-hard state has following specification:
Thickness: 0.1 ± 0.008mm～0.5 ± 0.02mm
Bandwidth :≤160 ± 0.2mm
Volume is heavy :≤1400Kg
Volume internal diameter: φ 300mm, φ 400mm, φ 500mm.
Properties of product: HV hardness: 130～220.
Cover copper layer thickness: the single face copper layer thickness accounts for 3～10% of gross thickness.
The present invention possesses following advantage:
Be mainly used in the elastic connecting plug-in unit in low-voltage electrical field and the IT products such as computer, mobile phone.Elastic connecting plug-in unit in low-voltage electrical field and the IT products such as computer, mobile phone, general H65, H62 brass or the tin-phosphor bronze of using in the past.The copper-clad steel band surface recombination that the applicant produces has H90 copper or T2 copper, and electric conductivity is (resistivity≤6.21 Ω .cm * 10 well
-6); Basic unit is carbon steel, high, the good springiness of hardness after work hardening, and equal volume weight is light than copper material, and cost is less than half of copper material, therefore prospect of the application is extensive.
Description of drawings
Fig. 1 is process chart of the present invention.
Fig. 2 is the present invention's CA composite rolling mill apparatus sketch used.
Description of reference numerals: 1. base material uncoiler; 2. levelling machine; 3. cover material uncoiler; 4. cover material; 5. heater; 6. deviation correcting device; 7. heating atmosphere is protected the chamber; 8. hot composite rolling mill; 9. cooling atmosphere protection chamber; 10. coiling machine; 11. base material.
The specific embodiment
Embodiment 1
Get corresponding copper strips and steel band, and process with the following steps order:
A. with the steel band pickling, and with the steel band scratch brushing after pickling; Pickling is to adopt 10wt% hydrochloric acid, temperature 60 C, pickling time 2 minutes.
B. with washing copper strips; Use utral degreaser C
9H
19C
6H
5O (CH
2CH
2O)
10Approximately 60 ℃ of H, cleaning temperature first carry out uncoiling, then use degreasing agent C
9H
19C
6H
5O (CH
2CH
2O)
10H cleans, then clear water rinses and dry, and batches at last;
C. steel band and copper strips are carried out CA compound;
D. the compound of step C gained is carried out the cold thick and intermediate annealing of 3 times;
E. the product with step D gained makes after finish rolling, cleaning, itemize, finished products.
An intermediate annealing: generally adopt continuous bright annealing furnace, according to the difference of material, thickness and requirement, annealing temperature is generally 750～850 ℃, and tape running speed is at 2～3.5m/min.
Secondary intermediate annealing: generally adopt circular bright cover type annealing stove, according to the difference that material, thickness and volume heavily wait, annealing temperature is 650～710 ℃, and temperature retention time is 5～10h.
Get corresponding copper strips and steel band, and process with the following steps order:
A. with the steel band pickling, and with the steel band scratch brushing after pickling; Pickling is to adopt 8wt% hydrochloric acid, temperature 60 C, pickling time 3 minutes.
B. with washing copper strips; Use utral degreaser C
9H
19C
6H
5O (CH
2CH
2O)
10Approximately 60 ℃ of H, cleaning temperature first carry out uncoiling, then use degreasing agent C
9H
19C
6H
5O (CH
2CH
2O)
10H cleans, then clear water rinses and dry, and batches at last;
C. steel band and copper strips are carried out CA compound;
D. the compound of step C gained is carried out the cold thick and intermediate annealing of 4 times;
E. the product with step D gained makes after finish rolling, cleaning, itemize, finished products.
An intermediate annealing: generally adopt continuous bright annealing furnace, according to the difference of material, thickness and requirement, annealing temperature is generally 750～850 ℃, and tape running speed is at 2～3.5m/min.
Secondary intermediate annealing: generally adopt circular bright cover type annealing stove, according to the difference that material, thickness and volume heavily wait, annealing temperature is 650～710 ℃, and temperature retention time is 5～10h.
Embodiment 3
Get corresponding copper strips and steel band, and process with the following steps order:
A. with the steel band pickling, and with the steel band scratch brushing after pickling; Pickling is to adopt 15wt% hydrochloric acid, temperature 60 C, pickling time 5 minutes.
B. with washing copper strips; Use utral degreaser C
9H
19C
6H
5O (CH
2CH
2O)
10Approximately 60 ℃ of H, cleaning temperature first carry out uncoiling, then clean with degreasing agent, then clear water rinse and dry, and batch at last;
C. steel band and copper strips are carried out CA compound;
D. the compound of step C gained is carried out the cold thick and intermediate annealing of 5 times;
E. the product with step D gained makes after finish rolling, cleaning, itemize, finished products.
An intermediate annealing: generally adopt continuous bright annealing furnace, according to the difference of material, thickness and requirement, annealing temperature is generally 750～850 ℃, and tape running speed is at 2～3.5m/min.
Secondary intermediate annealing: generally adopt circular bright cover type annealing stove, according to the difference that material, thickness and volume heavily wait, annealing temperature is 650～710 ℃, and temperature retention time is 5～10h.
The compound embodiment of embodiment 4CA
As shown in Figure 2, equipment used in the present invention adopts the hot complex technique of Controlled Atmosphere Protect.Base material 11 is through uncoiler 1 uncoiling, and through levelling machine 2 smoothings; Then cover material 4 heats with heater 5 through 3 uncoilings of cover material uncoiler, and rectifies a deviation through deviation correcting device 6; then enter heating atmosphere and protect chamber 7; and it is compound to carry out CA at hot composite rolling mill 8, then carries out coolingly in cooling atmosphere protection chamber 9, carries out at last furling with coiling machine 10.
Treat that compound raw material band through surface preparation, removes its surface oxide layer.Under reducing atmosphere protection, band is carried out on-line heating to the temperature of material melting point 60% left and right, enter composite rolling mill and be rolled, rolling after water cooling becomes the raw material of follow-up cold rolling processing.
The band steel adopts electrical resistance heating to heat, and the electric-resistivity method heating has the efficiency of heating surface high (η=90%), temperature in advantages such as cross-sectional direction are even.Copper strips is because thin thickness does not need heating (yet can adopt the heating of steel band mode of heating when the copper layer is thicker).High potential and electronegative potential device import steel band with heating current.
Band is through deviation correcting device and guide device, guarantees compoundly to carry out smoothly, and reduce that between them, unfitness of butt joint makes it to change in allowed band.
Be provided with the protective atmosphere chamber at the composite rolling mill entrance, the indoor hydrogen nitrogen mixed gas that is full of of atmosphere, oxidation does not occur in protection high temperature band.
Because 3 layers of band generation staggered floor phenomenon are inevitable, for guaranteeing on the whole width of steel band, copper strips to be arranged again, the wide 10～15mm of copper strips raw material ratio steel band, the composite rolling mill outlet artificially collects the unnecessary rim charge of copper strips.Skilled along with operative skill, the copper strips amount of relaxing can reduce.
Cooling at the cooling chamber water spray from composite rolling mill high temperature composite band out.
The thin copper-clad steel band product of the hard attitude of gained or half-hard state has performance as described in Table 1:
The performance table of table 1 embodiment 1～4
Above hard attitude provided by the present invention or the thin copper-clad steel band of half-hard state and preparation method thereof are described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (3)
1. a hard attitude or the thin copper-clad steel band of half-hard state, it is characterized in that: be used for the elastic plugin of processing IT product, described hard attitude or the thin copper-clad steel band of half-hard state are laminated with by accompanying one deck steel band in the middle of two-layer copper strips, and wherein, the components by weight of described steel band is:
C：≤0.25% Mn：0.35～0.55% Cr：≤0.15%
S：≤0.03% P：≤0.03% Si:≤0.06%
And being laminated with the described hard attitude of gained or the thickness of the thin copper-clad steel band of half-hard state is 0.1 ± 0.008mm～0.5 ± 0.02mm, and HV hardness is 130～220;
The preparation method of described hard attitude or the thin copper-clad steel band of half-hard state, adopt following steps:
A. with the steel band pickling, and with the steel band scratch brushing after pickling;
B. with washing copper strips;
C. steel band and copper strips are carried out CA compound;
D. the compound of step C gained is carried out the cold thick and intermediate annealing of 3-5 time, wherein the annealing temperature of an intermediate annealing is 750 ~ 850 ℃, tape running speed is 2～3.5m/min, and the annealing temperature of secondary intermediate annealing is 650～710 ℃, and temperature retention time is 5～10h;
E. the product with step D gained makes after finish rolling, cleaning, itemize, finished products.
2. hard attitude according to claim 1 or the thin copper-clad steel band of half-hard state is characterized in that: described pickling is to adopt 8～15wt% hydrochloric acid, 50 ~ 70 ℃ of temperature, pickling time 2 ~ 5 minutes.
3. hard attitude according to claim 1 or the thin copper-clad steel band of half-hard state, is characterized in that: described washing copper strips, use utral degreaser, 55 ~ 65 ℃ of cleaning temperatures.
4 hard attitudes according to claim 3 or the thin copper-clad steel band of half-hard state, it is characterized in that: described utral degreaser is C
9H
19C
6H
5O (CH
2CH
2O)
10H。
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| CN102554237A (en) * | 2010-12-22 | 2012-07-11 | 山东莱芜金石集团有限公司 | Production method of copper coated steel plate (strip) |
| CN108114998A (en) * | 2017-12-30 | 2018-06-05 | 江苏创泰特钢制品有限公司 | Composite alloy plate and preparation method thereof |
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Non-Patent Citations (3)
| Title |
|---|
| JP特开2003-226954A 2003.08.15 |
| 层状金属可控气氛保护热复合技术及设备研究;王岸民;《上海金属》;20071130;第29卷(第6期);42～46、55 * |
| 王岸民.层状金属可控气氛保护热复合技术及设备研究.《上海金属》.2007,第29卷(第6期),42～46、55. |
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