CN105063418B - Preparation method of low-alloying copper belt - Google Patents
Preparation method of low-alloying copper belt Download PDFInfo
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- CN105063418B CN105063418B CN201510443438.1A CN201510443438A CN105063418B CN 105063418 B CN105063418 B CN 105063418B CN 201510443438 A CN201510443438 A CN 201510443438A CN 105063418 B CN105063418 B CN 105063418B
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Abstract
The invention relates to a preparation method of a low-alloying copper belt. The low-alloying copper belt is characterized by including the following components of, by weight, 0.3-1.2 parts of Sn, 0.1-1.5 parts of Zn, 0.5-2.0 parts of Ni, 0.03-0.2 part of Po, 0-0.1 part of Fe and 93-99 parts of Cu. In the low-alloying copper belt, the Sn, Ni, Zn and P of low contents are subjected to solid solution treatment and exist in a matrix in a solid solution mode, and meanwhile part of the Ni and P form second-phase phosphide, that is, nickel phosphide, so that strength and the stress relaxation resistant performance of materials are improved, and the materials have high elasticity and conductivity; besides, the proportional relation between contents of the Sn, Ni and Zn is good for improvement of intensity and elasticity of the materials, the strengthening effect is not apparent when the contents of the Sn, Ni and Zn are too low, and the material conductivity is reduced seriously when the contents of the Sn, Ni and Zn are too high; compound hard particles separate out from the Ni and P in the low-alloying copper belt, so that the material elasticity is improved.
Description
Technical field
The present invention relates to be used for the low alloying copper strips technical field of automobile terminal, refer specifically to a kind of with high resiliency, height
The preparation method of the low alloying copper strips of conductivity.
Background technology
Tin-phosphor bronze is conventional elastic alloy, and the alloy passes through Sn-P element interactions and cold work hardening can be obtained preferably
Mechanical performance, the features such as with anti-corrosion, wear-resisting, nonmagnetic and excellent elastic performance, also with higher percentage elongation, easily
In processing punching into various complicated shapes flexible member, be consumption is maximum in Copper-Nickel-Aluminium Alloy material, purposes is most wide bullet
Property material.
The Chinese invention patent application of Publication No. CN104152742A《A kind of high-performance tin-phosphor bronze line and its producer
Method》(application number：CN201410448856.5), the Chinese invention patent application of Publication No. CN102259252A《It is a kind of high-elastic
The preparation method of property Sn-P bronze alloy foil》(application number：) etc. CN201110171904.7 disclose tin-phosphor bronze material
Preparation method, at present, commonly use in the composition proportion of tin-phosphor bronze, Theil indices generally 4～9%, phosphorus content is 0.1～
0.2%, such proportioning causes the relatively costly of tin-phosphor bronze material and conductivity is relatively low, and conductivity is only 11%～19%
IACS, it is impossible to meet the requirement of connector high conductivity used by automobile terminal and its high-end product.
The Chinese invention patent application of Application No. CN201510275343.3《A kind of high resiliency low cost tin-phosphor bronze is closed
Gold ribbon and preparation method thereof》Middle Theil indices be 0.5～2.5wt%, nickel content be 0～1.0wt%, phosphorus content be 0.05～
0.5wt%, the conductivity of the alloy can reach 20%, but the conductivity still due to being too low to suitable for automobile terminal or
Connector used by high-end product.
The content of the invention
The technical problem to be solved is the present situation for prior art, there is provided a kind of that there is high resiliency, height to lead
The preparation method of the low alloying copper strips of electric rate and stress relaxation-resistant, the method step are simple, prepared low alloying copper
Band has higher stress relaxation-resistant and conductivity and preparation cost is low.
The present invention solve the technical scheme that adopted of above-mentioned technical problem for：
A kind of preparation method of low alloying copper strips, it is characterised in that：
The low alloying copper strips includes following components by weight：
Wherein, in the form of nickel phosphide, remaining P and Ni and Sn, Zn are respectively with solid solution for a part of P and Ni
Form is present；
Described preparation method is comprised the following steps：
(1) by 0.3～1.2 part of Sn, 0.1～1.5 part of Zn, 0.5～2.0 part of Ni, 0.03～0.2 part of P, 0～0.1 part of Fe and
93～99 parts of Cu are added and melting are carried out in electric induction furnace, and are covered using Linesless charcoal, and smelting temperature is 1200～1250 DEG C, treats metal
After all melting, refine adjusting component；
(2) horizontal continuous-casting is carried out to copper alloy strand obtained by step (1), cast temperature is 1150～1250 DEG C；
(3) cold-rolling treatment is carried out after wash one's face copper alloy strand obtained by step (2) obtain finished product.
Used as improvement, the cold-rolling treatment process described in step (3) includes that strand, cold rolling, intermediate annealing, centre are cold successively
Roll and keep on file to anneal, wherein, described cold rolling and middle cold rolling working modulus is 80～90%.The temperature of the intermediate annealing is
580～650 DEG C, preferably 650 DEG C.The temperature for keeping on file to anneal is 480 DEG C.
In above-mentioned preferred version, finished product rolling, finished product process annealing and inspection after the completion of the step (3), are carried out again successively
Test out finished product process, the stress relief annealed temperature of the finished product is 280～320 DEG C, and annealing time is 2.5～3.5h.
Preferably, described P is added in the form of phosphor copper, and in the phosphor copper mass fraction of P be 14～
14.5%.
Preferably, the Cu of described Ni and surplus is added in the form of electrolytic nickel and cathode copper respectively.
Compared with prior art, it is an advantage of the current invention that：
In the low-alloy copper strips of the present invention, Sn, Ni, Zn, P solid solution of low content, in matrix in the form of solid solution
In, meanwhile, a part of Ni and p-shaped into the second phase phosphide, i.e. nickel phosphide, so as to improve the intensity and stress relaxation-resistant of material
Performance, makes material have high resiliency and high conductivity；And the proportionate relationship in the present invention between the content of Sn, Ni, Zn is also favourable
In the intensity and elasticity that improve material, when Sn, Ni, Zn content is too low, its reinforcing DeGrain, and Sn, Ni, Zn content mistake
Gao Shi, will seriously reduce materials conductive rate；The composition proportion of the present invention makes the conductivity of material more than 30%, and elastic modelling quantity exists
122～125GPa；
Ni in low-alloy copper strips of the present invention can improve recrystallization with crystal grain thinning except playing solution strengthening effect
Temperature；On the one hand P can play solution strengthening effect, on the other hand may also operate as deoxidation and improve the work of fluidity of molten
With, meanwhile, Ni and P precipitation compounds hard particles in crystal boundary and transgranular pinning dislocation, can improve the stress relaxation-resistant of material
And suppress recrystallization, so as to improve the elasticity of material；Material can seriously be reduced in segregation at grain boundaries when P content is too high
Plasticity and conductivity.
The preparation method step of low alloying copper strips of the present invention is simple, using big working modulus cold-rolling treatment and suitably middle
Eliminating as-cast structure, Jing after cold-rolling treatment, bulk crystal grain and arborescent structure are rolled broken strand annealing temperature, form tool
There is the texture structure substantially consistent with rolling direction, having with the rising texture structure of annealing temperature significantly eliminate sign, moves back
When fiery temperature is improved to 620～650 DEG C, the orientation of texture becomes by obscuring elimination, it is to avoid copper strips performance is along rolling side
To orientation, so that alloy strip has preferable transverse and longitudinal performance；It is not complete in the metallographic structure of alloy sheet strip after keeping on file to anneal
It is complete to recrystallize, certain cold deformed microstructure is remained, with proper mechanical property, makes finished product that there is higher resistance to stress
Relaxation force；
Low-alloy copper strips prepared by the present invention has higher stress relaxation-resistant and conductivity, simultaneously because preparation section
Simply, Sn, Ni, Zn content reasonable mixture ratio, reduces the production cost of material to a certain extent, and the market that improve material is competing
Strive power.
Description of the drawings
Fig. 1 is cold rolling rear materials microstructure structure chart under different annealing temperature in the embodiment of the present invention；
Fig. 2 is materials microstructure structure chart after annealing of keeping on file in the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
In the present invention, the preparation method of low alloying copper strips is comprised the following steps：
(1) by weight percentage, the raw material of respective amount is weighed according to the formula of low alloying copper strips in table 5, will electrolysis
Copper, electrolytic nickel, phosphor copper, zinc ingot metal, tin slab are sequentially added, and are covered using Linesless charcoal, melting temperature
Spend for 1200～1250 DEG C, after metal all melts, refine adjusting component；
(2) horizontal continuous-casting is carried out to copper alloy strand obtained by step (1), cast temperature is 1150～1250 DEG C；
(3) cold-rolling treatment is carried out after wash one's face copper alloy strand obtained by step (2), the cold-rolling treatment process is：Strand →
Cold rolling → intermediate annealing → centre is cold rolling → annealing of keeping on file, wherein, the blank dimension that strand is obtained is 70 × 16mm, it is cold rolling plus
Work rate is 90%, and middle cold rolling working modulus is 80%, and the temperature of intermediate annealing is 580～650 DEG C, and the temperature for keeping on file to anneal is
480℃；
(4) finished product rolling, finished product process annealing are carried out successively to strand obtained by step (3) and verifies finished product process.
As shown in figure 1, Fig. 1 a, 1b are respectively the group of material cold rolling rear transverse direction and longitudinal direction when intermediate anneal temperature is 580 DEG C
Structure chart is knitted, Fig. 1 c, 1d are respectively the organization chart of material cold rolling rear transverse direction and longitudinal direction when intermediate anneal temperature is 620 DEG C,
Fig. 1 e, 1f are respectively the organization chart of material cold rolling rear transverse direction and longitudinal direction when intermediate anneal temperature is 650 DEG C.Table 3 is centre
The mechanical performance data of material when being cold-rolled to 70 × 0.2mm of size.
Table 3
Significantly eliminate sign, but temperature as can be seen that having with the rising texture structure of annealing temperature with reference to table 3 by Fig. 1
Improve still high-visible to the vestige of deformation texture when 580 DEG C, mechanical property has very big reply, and matrix is remained in that
With the texture structure of rolling direction, the orientation of texture is still apparent from, with the vestige of 620 DEG C of deformation textures of raising of temperature
Further, but unintelligible, when temperature is to 650 DEG C, deformation texture disappears, and alloy strip has preferable transverse and longitudinal performance.
As shown in Fig. 2 it is 0.8mm alloy sheet strips that in Fig. 2,2a, 2b are respectively 480 DEG C of annealing of keeping on file, centre to be cold-rolled to thickness
Hard state and annealed state organization chart, table 4 for centre be cold-rolled to thickness be 0.7mm alloy sheet strips Mechanics Performance Testing number
According to.As can be seen that no perfect recrystallization in metallographic structure, remains certain cold deformed microstructure, with proper power
Performance is learned, finished product has higher resistance to stress relaxation force, i.e. high resiliency.
Table 4
Table 5
| Element | Cu | Sn | P | Ni | Fe | Zn |
| Content | 97.56 | 0.9 | 0.06 | 0.9 | 0.08 | 0.5 |
Table 1 is the material prescription of embodiment 1～3 and comparative example 1, wherein, the material of comparative example 1 is C5191 phosphor bronzes, table
In 1, each data are by weight percentage；Table 2 is the performance of material prepared by formula according to embodiment 1～3 and comparative example 1
Test data.
Electric induction furnace in embodiment 1,2,3 adopts 300Kg intermediate frequency furnaces, 1200～1250 DEG C of smelting temperature, cast
Temperature is 1150～1220 DEG C, and using horizontal continuous-casting, blank is 70 × 16mm.Cold-rolling treatment process：70 × 16mm of strand
→ cold rolling (working modulus 90%) (70 × 2.0mm) → intermediate annealing (650 DEG C of temperature) → centre cold rolling (70 × 0.8mm) → keep on file
Annealing (480 DEG C of temperature).
Table 1
Table 2
It can be seen that, low alloying copper strips prepared by the formula of the present invention has while having higher stress relaxation-resistant and leading
Electric rate, is a kind of comparatively ideal high conductivity, elastomeric copper strips material, can be used for electronic connector, automobile terminal manufacture
Field.
Claims (6)
1. a kind of preparation method of low alloying copper strips, it is characterised in that：
The low alloying copper strips includes following components by weight：
Wherein, a part of P and Ni be in the form of nickel phosphide, and remaining P and Ni and Sn, Zn are respectively in the form of solid solution
Exist；
Described preparation method is comprised the following steps：
(1) by 0.3～1.2 part of Sn, 0.1～1.5 part of Zn, 0.5～2.0 part of Ni, 0.03～0.2 part of P, 0～0.1 part of Fe and 93～
99 parts of Cu are added and melting are carried out in electric induction furnace, and are covered using Linesless charcoal, and smelting temperature is 1200～1250 DEG C, treats metal whole
After fusing, refine adjusting component；
(2) horizontal continuous-casting is carried out to copper alloy strand obtained by step (1), cast temperature is 1150～1250 DEG C；
(3) cold-rolling treatment will be carried out behind copper alloy strand milling face obtained by step (2) and obtains finished product；Described cold-rolling treatment process according to
It is secondary including strand, cold rolling, intermediate annealing, middle cold rolling and annealing of keeping on file, wherein, described cold rolling and middle cold rolling working modulus is
80～90%.
2. the preparation method of low alloying copper strips according to claim 1, it is characterised in that：The temperature of the intermediate annealing
For 580～650 DEG C.
3. the preparation method of low alloying copper strips according to claim 1, it is characterised in that：The temperature for keeping on file to anneal
For 480 DEG C.
4. the preparation method of low alloying copper strips according to claim 1, it is characterised in that：After the completion of the step (3)
Carrying out finished product rolling, finished product process annealing again successively and verify finished product process, the stress relief annealed temperature of the finished product is 280～
320 DEG C, annealing time is 2.5～3.5h.
5. the preparation method of low alloying copper strips according to claim 1, it is characterised in that：Described P is with phosphor copper
Form add, and in the phosphor copper P mass fraction be 14～14.5%.
6. the preparation method of low alloying copper strips according to claim 5, it is characterised in that：The Cu of described Ni and surplus
Added in the form of electrolytic nickel and cathode copper respectively.
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| CN105316520B (en) * | 2015-11-26 | 2017-11-14 | 山西春雷铜材有限责任公司 | A kind of preparation method of Cu Ni Sn copper alloy plate strips |
| CN107951461B (en) * | 2017-12-25 | 2021-08-06 | 青岛市妇女儿童医院 | Vaginal dilation blade for vaginal speculum used in obstetrics and gynecology department |
| CN108384985A (en) * | 2018-01-19 | 2018-08-10 | 无锡名精密铜带有限公司 | Low alloying copper strips and preparation method thereof |
| CN110643850B (en) * | 2019-10-24 | 2020-12-01 | 宁波博威合金材料股份有限公司 | Copper alloy with excellent bending performance and preparation method and application thereof |
| CN114507794A (en) * | 2022-02-11 | 2022-05-17 | 无锡日月合金材料有限公司 | Copper-nickel-tin alloy material for high-elasticity element and preparation method thereof |
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| JP4655834B2 (en) * | 2005-09-02 | 2011-03-23 | 日立電線株式会社 | Copper alloy material for electrical parts and manufacturing method thereof |
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