CN102560191A - High-performance elastic copper alloy and preparation and processing method thereof - Google Patents
High-performance elastic copper alloy and preparation and processing method thereof Download PDFInfo
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Abstract
The invention relates to high-performance elastic copper alloy and a preparation and processing method thereof. According to the weight percentage, the high-performance elastic copper alloy comprises the basic components as follows: 1 to 4 percent of Ni, 0.4 to 1 percent of Si, 0.5 to 1.5 percent of Co, and the rest percent of Cu, wherein the components in a copper alloy product need to satisfy the conditions as follows: (a) the content of Ni or Si is larger than or equal to 2.5 percent and smaller than or equal to 5 percent; (b) the content of Ni plus Si is larger than or equal to 1.4 percent and smaller than or equal to 4.0 percent; (c) the content of Ni plus Co is larger than or equal to 1.5 percent and smaller than or equal to 4 percent; and (d) the content of Ni plus Si or the content of C is larger than or equal to 1 percent and smaller than or equal to 5.0 percent. The preparation and processing method of the high-performance elastic copper alloy comprises the step: a, material burdening, material feeding, melting and casting which are conducted according to the weight percent; b, surface milling; c, hot rolling; d, solid solution treatment; e, cold processing; f, primary aging; g, cold processing; h, secondary ageing; i, pickling; and j, finished product annealing. The tensile strength Sigma b of the copper alloy is 780 to 950MPa, the plastic elongation rate Delta of the copper alloy is 4 to 10 percent, and the electric conductivity of the copper alloy is 35 to 55 percent according to an international annealed copper standard (IACS). The copper alloy has the advantages of high elasticity, high strength, high fatigability, good heat resistance and high electric conductivity.
Description
Technical field
The present invention relates to a kind of high-performance elastic copper alloy and preparation and working method; Be specially a kind of copper nisiloy cobalt-base alloy; This copper alloy has the characteristics of HS, snappiness, high fatigability, good heat resistance; The advantage that has had both high conductivity and stress relaxation-resistant simultaneously is mainly used in all kinds of electronic components such as electrical connector, spring, junctor, switch, contact, can substitute the snappiness beryllium copper in the occasion that much requires high conductivity.
Background technology
The high-performance elastic copper alloy is meant the alloy of when just excellent elasticity being arranged, taking into account high intensity, electrical and thermal conductivity performance and excellent high-temperature behavior again.This alloy material also can replace deleterious berylliumbronze mainly as materials such as the junctor in the industries such as automobile, mobile phone, electrician, electronics, electric power, transmitter, lead frame, conducting bridges in making rly. and connector element etc.
Copper base electronic connector material is as the special elastic material; Be widely used in instrument, field of electrical components; Along with of the development of various devices to highly reliable, miniaturized, long lifetime direction; Quality, kind to material are had higher requirement, and for example precision, specification, stress relaxation resistance, the shock resistance to material shakes extremely strictnesses of aspects requirement such as performance, weldability.Connector mainly contains with copper alloy at present: brass, tin-phosphor bronze, Corson alloy (Cu-Ni-Si), berylliumbronze, titanium bronze, German silver, iron phosphor bronze, Cu-Cr-Zr alloy.Can be divided into by performance: high strength alloy, in strong alloy, low-cost brass; Wherein low-cost alloy is mainly the simple brass of H65, and medium-to-high grade resilient material is mainly precipitation strength type copper alloy, spinodal decomposition (spinodal) alloy, solid solution low-temperature reinforcement type copper alloy.Copper-based alloy material also can replace deleterious berylliumbronze mainly as materials such as the junctor in the industries such as automobile, mobile phone, electrician, electronics, electric power, transmitter, lead frame, conducting bridges in making rly. and connector element etc.
In recent years; Along with industrial developments such as electronic information, modern communication, traffic, electric power, high property copper alloy such as high strength and high flexibility have been proposed more requirement, as: under room temperature and high temperature, keep high conduction, thermal conductivity; Good hardness has good distortion and working ability etc.With copper nisiloy cobalt is that the high-performance elastic copper alloy of principal element has HS, snappiness, high fatigability, good heat resistance, and the advantage that has had both high conductivity and stress relaxation-resistant simultaneously becomes the high strength and high flexibility copper alloy of a new generation.Retrieval shows, United States Patent(USP) No. 6506269 discloses the copper alloy of one of nickel, cobalt, silicon and magnesium with control addition or phosphorus.This patent introduction adopts high temperature process or low temperature method to handle copper alloy.The performance that high temperature process obtains does not reach the target combination of above-mentioned intensity and electroconductibility.When adopting high temperature process to handle, it is reported that the electroconductibility of exemplary alloy is 51.9%IACS, tensile strength is 709MPa; When adopting low temperature method to handle, the electroconductibility of exemplary alloy is 51.5%IACS, and tensile strength is 905MPa.But low temperature method is implemented excessive cold working to copper alloy, and expectation can cause formability variation and stress relaxation drag to descend.
Summary of the invention
One of the object of the invention is to provide a kind of novel high-performance elastic copper alloy; This alloy has HS, snappiness, high fatigability, good heat resistance; The advantage that has had both high conductivity and stress relaxation-resistant simultaneously can adapt to the requirement of hyundai electronics element to material.The present invention also in fusion process, solved ingot casting air-breathing with casting flaw such as shrinkage cavity and the ingot casting problem such as following process processing that is unfavorable for easy to crack in the press working process.
For realizing above-mentioned purpose, the present invention takes following technical scheme:
A kind of high-performance elastic copper alloy, according to mass percent, its basic ingredient comprises: Ni 1%～4%, Si0.4%～1%, Co 0.5%～1.5%, and all the other are Cu, and the composition in the said copper alloy products need satisfy: (a) 2.5≤Ni/Si≤5; (b) 1.4%≤Ni+Si≤4.0%; (c) 1.5%≤Ni+Co≤4%; (d) 1≤(Ni+Si)/Co≤5.0.
A kind of optimized technical scheme; It is characterized in that: also comprise the subsidiary element of at least a microalloying that is selected among Mg, Ag, Sn and the RE in the said copper alloy; Its content is Mg 0.1%～0.3%, and Ag 0.1%～1%, and Sn 0.1%～1%; RE (REE) 0.01%～0.1%, total amount should satisfy 0.01%≤Mg+Ag+Sn+RE≤0.5%.
Add the effect of element:
Nickel and cobalt: nickel and cobalt combine with silicon, form the effective silicon compound of age hardening, restrain grain growth and improve the stress relaxation-resistant ability.The content of nickel should be controlled at 1%～4%.When the content of nickel was lower than 1%, above-mentioned benefit was not obvious.When the content of nickel surpassed 4%, specific conductivity and processing characteristics descended.The content of cobalt should be controlled at 0.5%～1.5%, when the content of cobalt is lower than 0.5%, can not fully separate out the silicide second phase particle of cobalt, and said benefit is also not obvious.When the content of cobalt surpassed 1.5%, the silicide second phase particle that can cause separating out cobalt was too much, influenced the processing characteristics of alloy.
Silicon: in the present invention, silicon and nickel, cobalt can form silicide second mutually enhanced particles improve the intensity of alloy.The content of silicon should be controlled at 0.4%～1%.When silicone content was lower than 0.4%, the silicide second phase particle that alloy is separated out after overaging was very few, can not improve the intensity of alloy fully.When silicone content is higher than 1%, the specific conductivity of alloy and processing characteristics are descended.
Nisiloy is (nickel+silicon)/cobalt when: the intensity of nisiloy comparison alloy and specific conductivity influence are bigger, when nisiloy than less than 2.5 the time, specific conductivity obviously descends, alloy strength also is in a lower level; The nisiloy ratio was greater than 5 o'clock, and specific conductivity is in balance, but the intensity of alloy can be slow downward trend.And work as (nickel+silicon)/cobalt when being in the preferred version, alloy has specific conductivity and intensity preferably.
Magnesium, silver, tin and rare earth: one of characteristics of the present invention are to add the performance that some trace elements (each constituent content all is lower than 1%) improve alloy.Elements such as interpolation magnesium, tin can improve the castability of alloy, increase the flowability of alloy, improve the processing characteristics of alloy.Add the silver-colored stress relaxation-resistant ability that can improve alloy.Rare earth can purify alloy, improves specific conductivity, intensity and the local stress corrosion resistant of alloy.The addition of rare earth should be controlled at 0.01%～0.1%.If content of rare earth is lower than 0.01%, above-mentioned benefit is not obvious.If content of rare earth is higher than 0.1%, its effect is the same with impurity, can influence each item performance of alloy.
Another object of the present invention provides a kind of preparation method and working method of above-mentioned new copper nisiloy cobalt high-performance elastic copper alloy.
For realizing above-mentioned purpose, take following technical scheme:
A kind of preparation of high-performance elastic copper alloy and working method, comprise following technical process: a. according to mass percent prepare burden, feed intake, melting and casting, b. mills face; C. hot rolling, d. solution treatment, e. cold working; F. timeliness, g. cold working, h. secondary ageing; I. pickling, the j. finished products.
Among the step a, the said concrete order that feeds intake is: add copper (Cu) and nickel (Ni) earlier, after the fusing, add silicon (Si) again, silicon (Si) will entrain into stove with copper-clad, adds cobalt powder before coming out of the stove.
Among the step a, also add copper silver master alloy, copper tin master alloy, magnesium and/or rare earth before coming out of the stove.
Among the step a, the temperature of said melting is 1100～1300 ℃, and the temperature of said casting is controlled at 1100～1200 ℃.
Among the step c, said hot rolled temperature is 800～1000 ℃, and the time is 1～10h.
In the steps d, the temperature of described solution treatment is 900～1000 ℃, and the time is 1～5h.
Among the step f, the temperature of a said timeliness is 400～600 ℃, and the time is 1～20h, and the type of cooling is air cooling or furnace cooling.
Among the step h, the temperature of said secondary ageing is 300～500 ℃, and the time is 1～20h, and the type of cooling is air cooling or furnace cooling.
The invention has the advantages that: compare with other elastic copper alloys; Copper nisiloy cobalt high-performance elastic copper alloy of the present invention still is all to be very good aspect elasticity, corrosion-resistant, the processability in intensity, electroconductibility, also has good stress relaxation resistance simultaneously.And; The preparation process of this alloy material is fairly simple; Technical process is short, causes the problem that there is a large amount of pores in ingot casting inside and the ingot casting problem that is unfavorable for the following process processing easy to crack etc. in the press working process thereby solved very easily air-breathing in the melting and casting process.Be applied to substitute the snappiness beryllium copper in the occasion that much requires high conductivity in all kinds of electronic components such as electrical connector, spring, junctor, switch, contact.
The tensile strength sigma of high-performance elastic copper alloy of the present invention
bCan reach 780～950MPa, plastic elongation rate δ is 4～10%, and specific conductivity is 35～55%IACS.This copper alloy has snappiness, HS, high fatigability, good heat resistance, has had both the advantage of high conductivity simultaneously.
Through embodiment the present invention is further specified below, but and do not mean that restriction protection domain of the present invention.
Embodiment
The preparation process of the high-elastic copper nisiloy of the novel high-strength described in the present invention cobalt-base alloy is: a. prepares burden, feeds intake and melting according to mass percent---b. mills face---c. hot rolling---d. solution treatment---e. cold working---timeliness of f.---g. cold working---h. secondary ageing---i. pickling---j. finished products;
Wherein, concrete feeding sequence is: copper (Cu)+nickel (Ni), after the fusing, add silicon (Si), and wherein, silicon (Si) will entrain into stove with copper-clad, adds copper silver master alloy and copper tin master alloy and magnesium, cobalt powder and rare earth before coming out of the stove, and is used for crystal grain thinning and removal of impurities.Smelting temperature is 1100～1300 ℃, and pouring temperature is controlled at 1100～1200 ℃; Hot-rolled temperature is 800～1000 ℃, and the time is 2～10h; The temperature of solution treatment is 900～1000 ℃, and the time is 1～5h; Aging temp is 400～600 ℃ for the first time, and the time is 1～20h, and the type of cooling is air cooling or furnace cooling; Aging temp is 300～500 ℃ for the second time, and the time is 1～20h, and the type of cooling is air cooling or furnace cooling.
Embodiment 1
Prepare burden by listed each the element mass percent of table 1.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; After silicon melts fully, add cobalt powder, magnesium, charcoal, graphite scale, graphite cake cover melt and crucible then; Smelting temperature is 1250 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1150 ℃, makes this alloy.
Each element mass percent of table 1 alloy
| Alloying element | Cu | Ni | Co | Si | Mg | The foreign matter content summation |
| Content | Surplus | 3.0 | 0.78 | 0.6 | 0.15 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (850 ℃ * 1h, ε=70%), (950 ℃ * 1h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (600 ℃ * 2h); Cold rolling (ε=50%), (400 ℃ * 1h), obtain the thick band of 0.2mm at last of secondary ageing.
Embodiment 2
Prepare burden by listed each the element mass percent of table 2.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; After silicon melts fully, add copper tin master alloy and cobalt powder, charcoal, graphite scale, graphite cake cover melt and crucible then; Smelting temperature is 1200 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1100 ℃, makes this alloy.
Each element mass percent of table 2 alloy
| Alloying element | Cu | Ni | Co | Si | Sn | The foreign matter content summation |
| Content | Surplus | 1 | 1.1 | 0.4 | 0.1 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (900 ℃ * 1h, ε=70%), (950 ℃ * 1h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (500 ℃ * 4h); Cold rolling (ε=50%), (400 ℃ * 6h), obtain the thick band of 0.2mm at last of secondary ageing.
Embodiment 3
Prepare burden by listed each the element mass percent of table 3.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; Smelting temperature is 1300 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1200 ℃, makes this alloy.
Each element mass percent of table 3 alloy
| Alloying element | Cu | Ni | Co | Si | Ag | The foreign matter content summation |
| Content | Surplus | 1.5 | 1.5 | 0.6 | 0.1 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (950 ℃ * 1h, ε=70%), (900 ℃ * 1h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (550 ℃ * 4h); Cold rolling (ε=50%), (350 ℃ * 3h), obtain the thick band of 0.2mm at last of secondary ageing.
Embodiment 4
Prepare burden by listed each the element mass percent of table 4.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; After silicon melts fully, add cobalt powder and REE, charcoal, graphite scale, graphite cake cover melt and crucible then; Smelting temperature is 1300 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1200 ℃, makes this alloy.
Each element mass percent of table 4 alloy
| Alloying element | Cu | Ni | Co | Si | RE(Nd) | The foreign matter content summation |
| Content | Surplus | 1.5 | 1.1 | 0.6 | 0.01 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (800 ℃ * 10h, ε=70%), (900 ℃ * 5h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (550 ℃ * 1h); Cold rolling (ε=50%), (300 ℃ * 20h), obtain the thick band of 0.2mm at last of secondary ageing.
Embodiment 5
Prepare burden by listed each the element mass percent of table 5.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; After silicon melts fully, add copper silver master alloy, copper tin master alloy, cobalt powder, charcoal, graphite scale, graphite cake cover melt and crucible then; Smelting temperature is 1100 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1100 ℃, makes this alloy.
Each element mass percent of table 5 alloy
| Alloying element | Cu | Ni | Co | Si | Sn | Ag | The foreign matter content summation |
| Content | Surplus | 1.5 | 0.9 | 0.4 | 0.1 | 0.1 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (1000 ℃ * 2h, ε=70%), (1000 ℃ * 1h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (400 ℃ * 20h); Cold rolling (ε=50%), (500 ℃ * 1h), obtain the thick band of 0.2mm at last of secondary ageing.
Embodiment 6
Prepare burden by listed each the element mass percent of table 6.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; After silicon melts fully, add copper tin master alloy and cobalt powder, charcoal, graphite scale, graphite cake cover melt and crucible then; Smelting temperature is 1150 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1150 ℃, makes this alloy.
Each element mass percent of table 6 alloy
| Alloying element | Cu | Ni | Co | Si | Ag | RE(Nd) | The foreign matter content summation |
| Content | Surplus | 1.5 | 0.8 | 0.4 | 1 | 0.01 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (900 ℃ * 5h, ε=70%), (950 ℃ * 1h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (550 ℃ * 4h); Cold rolling (ε=50%), (400 ℃ * 8h), obtain the thick band of 0.2mm at last of secondary ageing.
Embodiment 7
Prepare burden by listed each the element mass percent of table 7.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; Smelting temperature is 1200 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1150 ℃, makes this alloy.
Each element mass percent of table 7 alloy
| Alloying element | Cu | Ni | Co | Si | Mg | RE(Nd) | The foreign matter content summation |
| Content | Surplus | 1 | 0.5 | 0.6 | 0.3 | 0.01 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (900 ℃ * 1h, ε=70%), (950 ℃ * 1h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (600 ℃ * 8h); Cold rolling (ε=50%), (350 ℃ * 4h), obtain the thick band of 0.2mm at last of secondary ageing.
Embodiment 8
Prepare burden by listed each the element mass percent of table 8.Electrolytic nickel that takes by weighing and electrolytic copper are put into crucible, with the charcoal layer covering of 5mm, on charcoal layer, spread evenly with tiny graphite scale again, purpose is to cover the slit that charcoal layer stays, and seals mouth of pot with graphite cake then; Crucible is put into intermediate frequency furnace, and rapid heating is carried out melting according to melting technology; Treat that raw material all melts in the crucible, add silicon, cover melt and crucible with charcoal, graphite scale, graphite cake; Smelting temperature is 1250 ℃, stirs insulation 5min; Come out of the stove, skim, the swage casting, pouring temperature is controlled at 1150 ℃, makes this alloy.
Each element mass percent of table 8 alloy
| Alloying element | Cu | Ni | Co | Si | Mg | Sn | The foreign matter content summation |
| Content | Surplus | 3.2 | 0.8 | 0.75 | 0.1 | 0.1 | ＜0.01 |
Alloy is milled face (upper and lower surfaces respectively mills 1mm), hot rolling (850 ℃ * 1h, ε=70%), (1000 ℃ * 1h of solid solutions successively; Water-cooled), cold rolling (ε=70%), timeliness (500 ℃ * 8h); Cold rolling (ε=50%), (300 ℃ * 8h), obtain the thick band of 0.2mm at last of secondary ageing.
According to each embodiment more than the present invention, process the band behind the 0.2mm, the test of carrying out performance is following:
1, test for tensile strength
Get product 1, product 2, product 3, product 4, product 5, product 6, product 7, product 8 and QBe2, C194, C7025 and the Cu-Cr-Zr of embodiment of the invention preparation, process the standard tensile sample, carry out the normal temperature tension test, the result is as shown in table 9.
The comparison of table 9 high strength and high flexibility copper alloy of the present invention and other copper alloy tensile strength
| Alloy | Unit elongation (%) | Tensile strength (MPa) |
| Product 1 | 8 | ?680 |
| Product 2 | 8 | ?905 |
| Product 3 | 7 | ?720 |
| Product 4 | 8 | ?890 |
| Product 5 | 7 | ?910 |
| Product 6 | 6 | ?950 |
| Product 7 | 7 | ?660 |
| Product 8 | 6 | ?690 |
| QBe2 | 9 | ?1000 |
| Cu-Ni-Sn | 9 | ?720 |
| C194 | 6 | ?600 |
| C7025 | 10 | ?705 |
| Cu-Cr-Zr | 8 | ?650 |
From table 9, can know; The alloy property of embodiment 1-6 is compared with some elastic copper alloys used and high performance lead frame alloy property, and tensile strength is higher, and unit elongation is also better; Be lower than berylliumbronze on the intensity slightly; But all far above some elasticity or lead frame Cu alloy materials such as Cu-Ni-Sn, C194, C7025 and Cu-Cr-Zr, the unit elongation and the tensile strength of the high-performance elastic copper alloy that the present invention developed are all higher, meet the application demand of high-performance elastic copper alloy.
2, conductivity test
Get product 1, product 2, product 3, product 4, product 5, product 6, product 7, product 8 and QBe2, C194, C7025 and the Cu-Cr-Zr of the embodiment of the invention, carry out the specific conductivity test, its result is as shown in table 10.
The comparison of table 10 copper alloy of the present invention and other copper alloy electric conductivitys
| Alloy | Electric conductivity (IACS%) |
| Product 1 | 55 |
| Product 2 | 49 |
| Product 3 | 54 |
| Product 4 | 49 |
| Product 5 | 52 |
| Product 6 | 53 |
| Product 7 | 45 |
| Product 8 | 48 |
| QBe2 | 25 |
| Cu-Ni-Sn | 11 |
| C194 | 58 |
| C7025 | 40 |
| Cu-Cr-Zr | 82 |
Can find out from table 10; The electric conductivity of copper nisiloy cobalt high strength and high flexibility Cu alloy material of the present invention is far above beraloy; A little less than the C194 alloy; Meet the application demand of high-performance elastic copper alloy and high performance lead frame material, can substitute the snappiness beryllium copper in the occasion that much requires high conductivity.
3, elasticity modulus test
The product 1, product 2, product 3, product 4, product 5, product 6, product 7, product 8, the QBe2 that get the embodiment of the invention carry out the Young's modulus test, and its result is as shown in table 11.
The comparison of table 11 copper alloy of the present invention and other copper alloy Young's modulus
| Alloy | Electric conductivity (IACS%) |
| Product 1 | 128 |
| Product 2 | 131 |
| Product 3 | 130 |
| Product 4 | 130 |
| Product 5 | 131 |
| Product 6 | 131 |
| Product 7 | 127 |
| Product 8 | 120 |
| QBe2 | 125 |
Take all factors into consideration above test situation, copper nisiloy cobalt high-performance elastic copper alloy of the present invention has higher intensity and good specific conductivity, and its contained element all is the domestic elements that are rich in, and does not have a smelting technique difficult problem, can cast out quality ingot casting preferably.Therefore, the present invention is a kind of a kind of novel high-performance elastic copper alloy material that market potential and application prospect are arranged very much.
Claims (10)
1. high-performance elastic copper alloy, according to mass percent, its basic ingredient comprises: Ni 1%～4%, and Si 0.4%～1%, and Co 0.5%～1.5%, and all the other are Cu, the composition in the said copper alloy products need satisfy: (a) 2.5≤Ni/Si≤5; (b) 1.4%≤Ni+Si≤4.0%; (c) 1.5%≤Ni+Co≤4%; (d) 1≤(Ni+Si)/Co≤5.0.
2. high-performance elastic copper alloy according to claim 1; It is characterized in that: also comprise at least a element that is selected among Mg, Ag, Sn and the RE in the said copper alloy; Its content is Mg 0.1%～0.3%, and Ag 0.1%～1%, and Sn 0.1%～1%; RE 0.01%～0.1%, and total amount should satisfy 0.01%≤Mg+Ag+Sn+RE≤0.5%.
3. the preparation and the working method of a high-performance elastic copper alloy according to claim 1 or claim 2, comprise following technical process: a. according to mass percent prepare burden, feed intake, melting and casting, b. mills face; C. hot rolling, d. solution treatment, e. cold working; F. timeliness, g. cold working, h. secondary ageing; I. pickling, the j. finished products.
4. the preparation of high-performance elastic copper alloy according to claim 3 and working method is characterized in that: among the step a, the said concrete order that feeds intake is: add Cu and Ni earlier, after the fusing, add Si again, Si will entrain into stove with copper-clad, adds cobalt powder before coming out of the stove.
5. the preparation of high-performance elastic copper alloy according to claim 4 and working method is characterized in that: among the step a, also add copper silver master alloy, copper tin master alloy, magnesium and/or rare earth before coming out of the stove.
6. the preparation of high-performance elastic copper alloy according to claim 3 and working method is characterized in that: among the step a, the temperature of said melting is 1100～1300 ℃, and the temperature of said casting is controlled at 1100～1200 ℃.
7. the preparation of high-performance elastic copper alloy according to claim 3 and working method is characterized in that: among the step c, said hot rolled temperature is 800～1000 ℃, and the time is 1～10h.
8. the preparation of high-performance elastic copper alloy according to claim 3 and working method is characterized in that: in the steps d, the temperature of described solution treatment is 900～1000 ℃, and the time is 1～5h.
9. the preparation of high-performance elastic copper alloy according to claim 3 and working method is characterized in that: among the step f, the temperature of a said timeliness is 400～600 ℃, and the time is 1～20h, and the type of cooling is air cooling or furnace cooling.
10. the preparation of high-performance elastic copper alloy according to claim 3 and working method is characterized in that: among the step h, the temperature of said secondary ageing is 300～500 ℃, and the time is 1～20h, and the type of cooling is air cooling or furnace cooling.
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| CN103526072A (en) * | 2013-04-26 | 2014-01-22 | 洛阳新火种节能技术推广有限公司 | Copper-based alloy preparation process |
| CN103695698A (en) * | 2013-12-26 | 2014-04-02 | 青岛友铭辰生物技术有限公司 | Copper alloy contact line for electrified railways and preparation method of copper alloy contact line |
| CN105264105A (en) * | 2013-06-04 | 2016-01-20 | 日本碍子株式会社 | Copper alloy production method, and copper alloy |
| CN105349819A (en) * | 2015-11-26 | 2016-02-24 | 山西春雷铜材有限责任公司 | Method for preparing high-strength high-conductivity copper alloy plate and strip |
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| JP2019077889A (en) * | 2017-10-19 | 2019-05-23 | Ｊｘ金属株式会社 | Copper alloy for electronic material |
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| CN112272495A (en) * | 2020-10-23 | 2021-01-26 | 太仓巧洲五金科技有限公司 | High-strength copper alloy heat conduction pipe with high heat conductivity for electronic product |
| CN113564415A (en) * | 2021-07-27 | 2021-10-29 | 中北大学 | Copper-nickel-tin-silicon alloy and preparation method and application thereof |
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| CN115961173A (en) * | 2021-10-08 | 2023-04-14 | 刘耀武 | Connector material, manufacturing process and connector |
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