CN106636734B - High-intensitive, highly conductive, high resistance to stress relaxation copper alloy elastic material and preparation method thereof - Google Patents
High-intensitive, highly conductive, high resistance to stress relaxation copper alloy elastic material and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of high-intensitive, highly conductive, high resistance to stress relaxation copper alloy elastic materials and preparation method thereof, belong to non-ferrous metals processing field.The weight percent of the material forms are as follows: Co 1.8~3.0%, Ni 2.3~3.6%, Si 1.0~1.5%, Cr 0.05~0.1%, Ag 0.01~0.05%, Zr 0.02~0.05%, B 0.02~0.05%, remaining is Cu, wherein, the mass ratio of Ni/Co be 1.2~2, the quality of Ag, Zr, B and be 0.05~0.1%.By melting and casting, homogenization is heat-treated, hot rolling, solution treatment, once cold rolling, level-one ageing treatment, secondary cold-rolling, and the material is prepared in secondary time effect processing.Tensile strength, conductivity, elongation percentage and the stress relaxation resistance of material of the present invention fully meet the requirement of automobile high-current relay and connector.
Description
Technical field
The present invention relates to a kind of high-intensitive, highly conductive, high resistance to stress relaxation copper alloy elastic materials and preparation method thereof, belong to
In non-ferrous metals processing field.
Background technique
High-strength high-elasticity acid bronze alloy by the performances such as its high intensity, excellent elasticity, endurance, elastic hysteresis be small,
It is widely used in the industries such as medical treatment, aviation and navigation navigation instrument, machine-building, instrument and instrument manufacturing.City of the country at present
Copper-Nickel-Aluminium Alloy is mainly based on the materials such as tin-phosphor bronze and beryllium-bronze on field, due to Sn-P-Cu alloy elastic property and
Stress relaxation resistance is poor, most of to be applied to require in lower use environment elastic property.
Beraloy is the alloy that a kind of Precipitation is strengthened, have after fixation rates high intensity, hardness,
Elastic limit, and stability is good, have anti-corrosion, wear-resisting, endurance, low temperature resistant, nonmagnetic, electrical and thermal conductivity is good, impact when
The series of advantages such as spark will not be generated, " king of coloured elastic material " is known as, can be widely applied to electronic apparatus, communication instrument
The multiple fields such as device, aerospace, petrochemical industry, metallurgical mine, vehicle appliance, machine-building, it has also become the development of the national economy
In indispensable essential industry material.Beryllium-bronze can be divided into high beryllium copper (Be:1.6-2.2%) and low according to beryllium content height
Two class of beryllium copper (Be:0.15-0.7%) alloy, wherein high beallon belongs to high strength type elastic alloy, low beryllium content copper alloy belongs to
Conductivity type elastic alloy.In late 1990s, with the rapid development of automobile industry, the dosage of electronic component is obtained quickly
Increase, control system position especially in automobile engine nacelle component also higher and higher to the performance requirement of beraloy,
Its operating temperature is relatively high, and shakes severe, it is desirable that and beraloy has higher high temperature resistant and stress relaxation resistance power,
This makes high-intensitive beryllium-bronze be unable to satisfy the requirement of automobile high-current relay and high temperature connector.2003, Brush
Wellman company has developed a kind of with high-strength by adjusting Ni, Be constituent content ratio and production technology in low-beryllium bronze alloy
(tensile strength is greater than 1000MPa, and conductivity is greater than for degree, -390 alloy of high conductivity and high resistance to stress relaxed type beraloy
85%) stress relaxation-resistant of 40%IACS, 150 DEG C of heat preservation 1000h are greater than, breaching C17200 alloy has high-intensitive low conductance
Rate and C17510 alloy have the low intensive performance bottleneck of high conductivity, are successfully applied in automobile high-current relay and connector
Field.
Beryllium-bronze seriously endangers the health of people due to this hypertoxic element containing beryllium in process of production.Each cubic metre
As long as there is the dust of one milligram of beryllium in air, it will make one to catch acute pneumonia-berylliosis of lung disease, the group of the compound of beryllium in animal
It knits and forms soluble colloid substance in blood plasma, make histoorgan that various lesions occur, beryllium is also possible to draw in lung and bone
Send out cancer.In addition, beryllium-bronze in the case where being higher than 200 DEG C of environment in use, its intensity, elasticity sharply decline, stress relaxation rate is up to
40% or more, lead to the change of the arc extinguishing ability, spring load characteristic of relay in the operating condition, elastic property drastically reduces, very
To operational failure.In addition, the production technology due to beraloy is complicated, structure property is sensitive to heat treatment, in technological operation
Difference easily cause that grain size is uneven, hardening constituent is precipitated uneven, cause alloy to be easy to appear during military service
The service life that crackle reduces material is short.Therefore, the environmentally friendly height of high-strength, high-elastic, conductive high resistance to stress relaxation is developed
Performance elastic properties copper alloy is the emphasis of foreign study and tackling key problem.The former Soviet Union, the U.S., Japan and the Chinese Cu-Ti developed in succession,
The novel no beryllium elastic copper alloy such as Cu-Ni-Al, Cu-Ni-Sn, " Ka Milong ", " card thick forest ", MHII15-20 and spedex alloy.
These alloys all have quite high intensity (>=1000MPa), and still maintain at 150 DEG C higher intensity and stable
Elastic property, but the conductivity of these alloys is relatively low, no more than 15%IACS, is lower than high beraloy.
Have developed the CuNiSi system alloy of high-content in recent years, the alloy as described in CN101333610B have high intensity (>=
1000MPa) and good stress relaxation-resistant, but conductivity is lower, is no more than 30%IACS, it is difficult to meet automobile high current relay
Device and connector requirement.
Summary of the invention
The main object of the present invention is to make up the deficiency of existing copper alloy property, develops a kind of high-intensitive, high conductivity
And high resistance to stress relaxation, environmentally friendly copper alloy elastic material and provide a kind of simple production process, easy to operate preparation
Method meets the use demand of high-current relay and connector.
A kind of high-intensitive, high conductivity and high resistance to stress relaxation copper alloy elastic material, its weight percent composition are as follows:
Co 1.8~3.0%, Ni 2.3~3.6%, Si 1.0~1.5%, Cr 0.05~0.1%, Ag 0.01~0.05%, Zr
0.02~0.05%, B 0.02~0.05%, remaining is Cu, wherein the mass ratio of Ni/Co is 1.2~2, tri- element of Ag, Zr, B
Quality summation is 0.05~0.1%.Ni and Co mass summation are preferably 4.5~6.5%.
Added alloys producing:
Nickel: nickel element is precipitated with the formation of nisiloy precipitated phase mainly in ag(e)ing process in conjunction with silicon, improves the strong of alloy
Degree and conductivity.The present invention is in order to obtain high intensity, therefore nickel content is selected as 2.3~3.6%.
Cobalt: cobalt element mainly in conjunction with silicon, forms cobalt silicon precipitated phase in ag(e)ing process.Due to cobalt in copper alloy most
Big solubility is 5%, and maxima solubility only has 0.5% at room temperature.Compare the binding ability of nickel and cobalt and silicon it is found that cobalt element
It is easier to combine with silicon in ag(e)ing process.A certain amount of cobalt element is added in copper alloy, can further be purified in matrix,
The intensity for improving alloy simultaneously, improves the conductivity of alloy.But addition cobalt content it is excessive when, be easy to produce magnetism, be unfavorable for
The use of alloy.Therefore, cobalt content should be selected as 1.8~3.0%.Furthermore, it is contemplated that price and Ni, Co member of Ni, Co element
Influence of the element to alloy property, especially Ni, Co and Si can form (Ni, Co)xSi phase, this opposite raising alloy high-temp resistance to stress pine
Relaxation performance has remarkable effect.Therefore, the present invention in Ni/Co mass ratio be selected as it is proper when 1.2~2.
Chromium: a small amount of chromium mainly exists in the form of simple substance chromium phase in the alloy, improves the intensity of alloy, moreover it is possible to change
The repeated bending performance of kind alloy.
Silver: a small amount of silver element is in addition to that can improve the intensity of alloy under the premise of unobvious attenuating alloy conductivity
With softening performance resistant to high temperatures.It is added in the present invention with silver element, can not only inhibit growing up for nickel cobalt silicon phase, moreover it is possible to improve analysis
The precipitation density of phase out improves the intensity and conductivity of alloy.In addition, after adding silver element in alloy, moreover it is possible to after improving alloy
Continuous tin plating or silver-plated performance.
Zirconium and boron: micro zirconium and boron element is main in the alloy, and there are two effects: (1) zr element meeting in ag(e)ing process
In conjunction with copper, copper zirconium precipitated phase is formed, increases alloy and phase density is precipitated, improve the intensity of alloy；(2) micro zirconium and boron element
Common addition can significantly improve the stress relaxation resistance of alloy.
It is a further object of the present invention to provide above-mentioned high-intensitive, highly conductive and high resistance to stress relaxation copper alloy elastic material
Prepare processing method.
A kind of high-intensitive, highly conductive and high resistance to stress relaxation copper alloy elastic material preparation processing method, including it is following
Process flow: a. carries out ingredient according to mass percent, feeds intake, melting and casting, b. homogenization heat treatment, c. hot rolling, and d. is solid
Molten processing, e. once cold rolling, ageing treatment of f., g. secondary cold-rolling, the processing of h. secondary ageing.
In step a, founding is carried out using vacuum medium frequency induction furnace, the smelting temperature is 1250~1300 DEG C, described
Casting temperature control at 1150~1200 DEG C.
Before melting, in boron oxide crucible be added cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%Cr,
Temperature is risen to 1250~1300 DEG C, after copper copper fusing to be electrolysed, vacuumized, vacuum by Cu-10wt%Zr and Cu-B intermediate alloy
Degree is less than 0.1Pa, is then passed through nitrogen again, and after melt is completely melt, uniform stirring is cast after keeping the temperature 10min.
In step b, above-mentioned alloy cast ingot is heated in batch-type furnace, homogenization heat treatment temperature is 920~960
DEG C, soaking time is 8~12h, and the type of cooling is water cooling.
In step c, above-mentioned alloy cast ingot is heated in stepping batch-type furnace, temperature is 850~900 DEG C, when heat preservation
Between be 1~5h, then carry out hot rolling again, finishing temperature control then carries out water cooling at 700~750 DEG C.
In step d, by after hot rolling plate placing box formula annealing furnace carry out solution treatment, solid solution temperature be 960~
1050 DEG C, soaking time is 1~4h, and the type of cooling is water cooling.
In step e, solution treatment back plate band is subjected to cold rolling, the working modulus of once cold rolling is 60~80%.
In step f, the plate after cold rolling is placed in box-annealing furnace and carries out an ageing treatment, an ageing treatment
Temperature is 400~450 DEG C, and soaking time is 2~6h, and the type of cooling is air-cooled.
In step g, the plate after an ageing treatment is subjected to cold rolling, the working modulus of secondary cold-rolling is 30~50%.
In step h, the plate after cold rolling is placed into box-annealing furnace and carries out secondary ageing processing, secondary ageing treatment temperature
Be 450~500 DEG C, soaking time be 1~for 24 hours, the type of cooling be it is air-cooled.
Advantages of the present invention: the present invention obtains a kind of high-intensitive, height and leads by carrying out ingredient design and optimization to copper alloy
Electric rate and high resistance to stress relaxation copper alloy elastic material, chemical component are as follows: cobalt content is 1.8~3.0%, nickel content 2.3
~3.6%, silicone content is 1.0~1.5%, and chromium content is 0.05~0.1%, and zirconium content is 0.02~0.05%, and silver content is
0.01~0.05%, boron content is 0.02~0.05%, remaining is Cu.Wherein the element mass ratio of alloy nickel and cobalt meets: 1.2
≤ Ni/Co≤2.0, boron, silver and zr element quality sum meet: 0.05%≤Ag+B+Zr≤0.1%.In addition, in order to guarantee to close
Gold has high-intensitive, high conductivity and excellent stress relaxation resistance simultaneously, and the present invention has developed a kind of suitable for above-mentioned
The preparation processing method of copper alloy, the elastic copper alloy Tensile strength after processed heat treatment are 1005~1108MPa, electricity
Conductance be 40~45%IACS, elongation percentage be 2~5%, stress relaxation resistance (work 1000h at 150 DEG C) be 85%~
90%, fully meet the requirement of automobile high-current relay and connector.
Below by specific embodiment, the present invention will be further described, but is not meant to the scope of the present invention
Limitation.
Specific embodiment
High-intensitive, highly conductive and high resistance to stress relaxation copper alloy elastic material of the invention, it contains following weight percent
Several chemical component: Co 1.8~3.0%, Ni 2.3~3.6%, Si 1.0~1.5%, Cr 0.05~0.1%, Ag 0.01
~0.05%, Zr 0.02~0.05%, B 0.02~0.05%, remaining is Cu.Wherein the element mass ratio of alloy nickel and cobalt is full
Foot: 1.2≤Ni/Co≤2.0, the element mass ratio of nickel and cobalt meets in alloy: 1.2≤Ni/Co≤2.0, boron, silver and zr element
Quality sum meets: 0.05%≤Ag+B+Zr≤0.1%.
Above-mentioned high-intensitive, highly conductive and high resistance to stress relaxation copper alloy elastic material preparation and processing method, including with
Lower process flow: a. carries out ingredient according to mass percent, feeds intake, melting and casting, b. homogenization heat treatment, c. hot rolling, d.
Solution treatment, e. once cold rolling, ageing treatment of f., g. secondary cold-rolling, h. secondary treatment.Wherein, specific feeding sequence
Are as follows: cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5%Cr, Cu-10%Zr and Cu-B are added in boron oxide crucible
Temperature is risen to 1250~1300 DEG C, after copper copper fusing to be electrolysed, vacuumized, vacuum degree is less than 0.1Pa, then by intermediate alloy
It is passed through nitrogen again, after melt is completely melt, uniform stirring is cast after keeping the temperature 10min, and cast temperature is 1150~1200 DEG C；
Homogenizing heat treatment temperature is 920~960 DEG C, and soaking time is 8~12h, and the type of cooling is water cooling.Hot-rolled temperature be 850~
900 DEG C, soaking time is 1~5h, and finishing temperature control is at 700~750 DEG C；Solid solution temperature is 960~1050 DEG C, heat preservation
Time is 1~4h, and the type of cooling is water cooling；Once cold rolling general working rate be 60~80%, level-one aging temperature be 400~
450 DEG C, soaking time is 2~6h, and the type of cooling is air-cooled；Secondary cold-rolling general working rate is 30~50%, secondary time effect processing
Temperature be 450~500 DEG C, soaking time be 1~for 24 hours, the type of cooling be it is air-cooled.
Embodiment 1
Alloy of the invention uses following raw material melting: cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%
Cr, Cu-10wt%Zr and Cu-B intermediate alloy.The ingredient of alloy is shown in Table 1 embodiment 1.
1. melting: in boron oxide crucible be added cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%Cr,
Temperature is risen to 1250 DEG C, after copper copper fusing to be electrolysed, vacuumized, vacuum degree is less than by Cu-10wt%Zr and Cu-B intermediate alloy
Then 0.1Pa is passed through nitrogen again, after melt is completely melt, cast after uniform stirring, and cast temperature is 1150 DEG C.
2. homogenization heat treatment: carrying out homogenization heat treatment to alloy, temperature is 920 DEG C, soaking time 8h, cooling side
Formula is water cooling.
3. hot rolling: being heated to alloy, temperature is 850 DEG C, soaking time 1h, and finishing temperature is 700 DEG C, cooling side
Formula is water cooling.
4. solution treatment: the plate after hot rolling being placed box-annealing furnace and carries out solution treatment, solid solution temperature 960
DEG C, soaking time 4h, the type of cooling is water cooling.
5. once cold rolling: the strip after solution treatment is carried out cold rolling, general working rate 60%.
6. level-one ageing treatment: the plate after cold rolling being carried out to place box-annealing furnace progress ageing treatment, aging temp
It is 400 DEG C, soaking time 2h, the type of cooling is air-cooled.
7. secondary cold-rolling: the plate after ageing treatment is carried out cold rolling, general working rate 50%.
8. secondary time effect is handled: cold-rolled plate and strip being placed box-annealing furnace and carries out ageing treatment, aging temperature is
450 DEG C, soaking time 6h, the type of cooling is air-cooled.
By the above melting and casting, homogenization heat treatment, hot rolling, solution treatment, once cold rolling, level-one ageing treatment,
After the working processes such as secondary cold-rolling, secondary time effect processing, performance is shown in Table the embodiment 1 in 2.
Embodiment 2
Alloy of the invention uses following raw material melting: cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%
Cr, Cu-10wt%Zr and Cu-B intermediate alloy.The ingredient of alloy is shown in Table 1 embodiment 2.
1. melting: in boron oxide crucible be added cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%Cr,
Temperature is risen to 1270 DEG C, after copper copper fusing to be electrolysed, vacuumized, vacuum degree is less than by Cu-10wt%Zr and Cu-B intermediate alloy
Then 0.1Pa is passed through nitrogen again, after melt is completely melt, cast after uniform stirring, and cast temperature is 1170 DEG C.
2. homogenization heat treatment: carrying out homogenization heat treatment to alloy, temperature is 940 DEG C, soaking time 10h, cooling
Mode is water cooling.
3. hot rolling: being heated to alloy, temperature is 870 DEG C, soaking time 3h, and finishing temperature is 700 DEG C, cooling side
Formula is water cooling.
4. solution treatment: the plate after hot rolling being placed box-annealing furnace and carries out solution treatment, solid solution temperature 980
DEG C, soaking time 2h, the type of cooling is water cooling.
5. once cold rolling: the strip after solution treatment is carried out cold rolling, general working rate 80%.
6. level-one ageing treatment: the plate after cold rolling being carried out to place box-annealing furnace progress ageing treatment, aging temp
It is 450 DEG C, soaking time 4h, the type of cooling is air-cooled.
7. secondary cold-rolling: the plate after ageing treatment is carried out cold rolling, general working rate 30%.
8. secondary time effect is handled: cold-rolled plate and strip being placed box-annealing furnace and carries out ageing treatment, aging temperature is
450 DEG C, soaking time is that for 24 hours, the type of cooling is air-cooled.
By the above melting and casting, homogenization heat treatment, hot rolling, solution treatment, once cold rolling, level-one ageing treatment,
After the working processes such as secondary cold-rolling, secondary time effect processing, performance is shown in Table the embodiment 2 in 2.
Embodiment 3
Alloy of the invention uses following raw material melting: cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%
Cr, Cu-10wt%Zr and Cu-B intermediate alloy.The ingredient of alloy is shown in Table 1 embodiment 3.
1. melting: in boron oxide crucible be added cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%Cr,
Temperature is risen to 1300 DEG C, after copper copper fusing to be electrolysed, vacuumized, vacuum degree is less than by Cu-10wt%Zr and Cu-B intermediate alloy
Then 0.1Pa is passed through nitrogen again, after melt is completely melt, cast after uniform stirring, and cast temperature is 1200 DEG C.
2. homogenization heat treatment: carrying out homogenization heat treatment to alloy, temperature is 960 DEG C, soaking time 8h, cooling side
Formula is water cooling.
3. hot rolling: being heated to alloy, temperature is 870 DEG C, soaking time 5h, and finishing temperature is 730 DEG C, cooling side
Formula is water cooling.
4. solution treatment: the plate after hot rolling being placed box-annealing furnace and carries out solution treatment, solid solution temperature is
1000 DEG C, soaking time 2h, the type of cooling is water cooling.
5. solution treatment back plate band is carried out cold rolling, general working rate 70% by once cold rolling.
6. level-one ageing treatment: the plate after cold rolling being carried out to place box-annealing furnace progress ageing treatment, aging temp
It is 450 DEG C, soaking time 6h, the type of cooling is air-cooled.
7. secondary cold-rolling: the plate after ageing treatment is carried out cold rolling, general working rate 40%.
8. secondary time effect is handled: cold-rolled plate and strip being placed box-annealing furnace and carries out ageing treatment, aging temperature is
500 DEG C, soaking time 1h, the type of cooling is air-cooled.
By the above melting and casting, homogenization heat treatment, hot rolling, solution treatment, once cold rolling, level-one ageing treatment,
After the working processes such as secondary cold-rolling, secondary time effect processing, performance is shown in Table the embodiment 3 in 2.
Embodiment 4
Alloy of the invention uses following raw material melting: cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%
Cr, Cu-10wt%Zr and Cu-B intermediate alloy.The ingredient of alloy is shown in Table 1 embodiment 4.
1. melting: in boron oxide crucible be added cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%Cr,
Temperature is risen to 1250 DEG C, after copper copper fusing to be electrolysed, vacuumized, vacuum degree is less than by Cu-10wt%Zr and Cu-B intermediate alloy
Then 0.1Pa is passed through nitrogen again, after melt is completely melt, cast after uniform stirring, and cast temperature is 1150 DEG C.
2. homogenization heat treatment: carrying out homogenization heat treatment to alloy, temperature is 920 DEG C, soaking time 12h, cooling
Mode is water cooling.
3. hot rolling: being heated to alloy, temperature is 900 DEG C, soaking time 1h, and finishing temperature is 700 DEG C, cooling side
Formula is water cooling.
4. solution treatment: the plate after hot rolling being placed box-annealing furnace and carries out solution treatment, solid solution temperature is
1050 DEG C, soaking time 1h, the type of cooling is water cooling.
5. once cold rolling: the band after solution treatment is carried out cold rolling, general working rate 60%.
6. level-one ageing treatment: the plate after solution treatment being carried out to place box-annealing furnace progress ageing treatment, timeliness
Temperature is 450 DEG C, soaking time 2h, and the type of cooling is air-cooled.
7. secondary cold-rolling: the plate after ageing treatment is carried out cold rolling, general working rate 40%.
8. secondary time effect is handled: cold-rolled plate and strip being placed box-annealing furnace and carries out ageing treatment, aging temperature is
450 DEG C, soaking time 8h, the type of cooling is air-cooled.
By the above melting and casting, homogenization heat treatment, hot rolling, solution treatment, once cold rolling, level-one ageing treatment,
After the working processes such as secondary cold-rolling, secondary time effect processing, performance is shown in Table the embodiment 4 in 2.
Embodiment 5
Alloy of the invention uses following raw material melting: cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%
Cr, Cu-10wt%Zr and Cu-B intermediate alloy.The ingredient of alloy is shown in Table 1 embodiment 5.
1. melting: in boron oxide crucible be added cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt%Cr,
Temperature is risen to 1270 DEG C, after copper copper fusing to be electrolysed, vacuumized, vacuum degree is less than by Cu-10wt%Zr and Cu-B intermediate alloy
Then 0.1Pa is passed through nitrogen again, after melt is completely melt, cast after uniform stirring, and cast temperature is 1200 DEG C.
2. homogenization heat treatment: carrying out homogenization heat treatment to alloy, temperature is 940 DEG C, soaking time 8h, cooling side
Formula is water cooling.
3. hot rolling: being heated to alloy, temperature is 850 DEG C, soaking time 5h, and finishing temperature is 750 DEG C, cooling side
Formula is water cooling.
4. solution treatment: the plate after hot rolling being placed box-annealing furnace and carries out solution treatment, solid solution temperature is
1025 DEG C, soaking time 2h, the type of cooling is water cooling.
5. once cold rolling: the band after solution treatment is carried out cold rolling, general working rate 70%.
6. level-one ageing treatment: the plate after solution treatment being carried out to place box-annealing furnace progress ageing treatment, timeliness
Temperature is 400 DEG C, soaking time 6h, and the type of cooling is air-cooled.
7. secondary cold-rolling: the plate after ageing treatment is carried out cold rolling, general working rate 50%.
8. secondary time effect is handled: cold-rolled plate and strip being placed box-annealing furnace and carries out ageing treatment, aging temperature is
475 DEG C, soaking time 8h, the type of cooling is air-cooled.
By the above melting and casting, homogenization heat treatment, hot rolling, solution treatment, once cold rolling, level-one ageing treatment,
After the working processes such as secondary cold-rolling, secondary time effect processing, performance is shown in Table the embodiment 5 in 2.
The alloying component formula (wt%) of 1 embodiment 1-5 of table
The alloy property table of 2 embodiment 1-5 of table
The tensile strength of high-intensitive, highly conductive and high resistance to stress relaxation copper alloy elastic material of the invention is 1005~
1108MPa, conductivity are 40~45%IACS, and elongation percentage is 2~5%, and stress relaxation resistance (works at 150 DEG C
1000h) it is 85%~90%, 390 alloy of beryllium copper can be substituted, the use for meeting automobile high-current relay and connector is wanted
It asks.
Claims (10)
1. a kind of high-intensitive, high conductivity and high resistance to stress relaxation copper alloy elastic material, it is characterised in that: its weight percent
Than composition are as follows: Co 1.8~3.0%, Ni 2.8~3.6%, Si 1.0~1.5%, Cr 0.05~0.1%, Ag 0.01~
0.05%, Zr 0.02~0.05%, B 0.02~0.05%, remaining is Cu, wherein the mass ratio of Ni/Co be 1.2~2, Ag,
The quality of Zr, B and be 0.05~0.1%.
2. the preparation processing side of high-intensitive, high conductivity described in claim 1 and high resistance to stress relaxation copper alloy elastic material
Method, comprising the following steps: a. carries out ingredient according to mass percent, feeds intake, melting and casting, b. homogenization heat treatment, c. heat
It rolls, d. solution treatment, e. once cold rolling, ageing treatment of f., g. secondary cold-rolling, the processing of h. secondary ageing.
3. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method, it is characterised in that: cathode copper, electrolytic nickel, electrolytic cobalt, pure silicon, fine silver, Cu-5wt% are added in boron oxide crucible
Temperature is risen to 1250~1300 DEG C, after copper fusing to be electrolysed, vacuumized, so by Cr, Cu-10wt%Zr and Cu-B intermediate alloy
It is passed through nitrogen again afterwards, after melt is completely melt, uniform stirring, casting, casting temperature are 1150~1200 DEG C.
4. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method, it is characterised in that: the homogenization heat treatment temperature is 920~960 DEG C, and soaking time is 8~12h, cooling side
Formula is water cooling.
5. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method, it is characterised in that: the hot-rolled temperature be 850~900 DEG C, soaking time be 1~5h, finishing temperature be 700~
750 DEG C, then carry out water cooling.
6. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method, it is characterised in that: the solid solution temperature is 960~1050 DEG C, and soaking time is 1~4h, and the type of cooling is
Water cooling.
7. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method, it is characterised in that: the working modulus of the once cold rolling is 60~80%.
8. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method a, it is characterised in that: aging temperature is 400~450 DEG C, and soaking time is 2~6h, the type of cooling
It is air-cooled.
9. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method, it is characterised in that: the working modulus of the secondary cold-rolling is 30~50%.
10. the preparation of high-intensitive, high conductivity according to claim 2 and high resistance to stress relaxation copper alloy elastic material adds
Work method, it is characterised in that: the secondary ageing treatment temperature be 450~500 DEG C, soaking time be 1~for 24 hours, cooling side
Formula is air-cooled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510728916.3A CN106636734B (en) | 2015-10-30 | 2015-10-30 | High-intensitive, highly conductive, high resistance to stress relaxation copper alloy elastic material and preparation method thereof |
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| CN111485132B (en) * | 2020-04-10 | 2021-09-10 | 宁波博威合金板带有限公司 | Copper alloy strip with excellent comprehensive performance and preparation method thereof |
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| CN114203358B (en) * | 2021-12-15 | 2023-08-15 | 有研工程技术研究院有限公司 | Ultrahigh-strength high-conductivity copper alloy conductor material and preparation method and application thereof |
| CN114672751A (en) * | 2022-05-30 | 2022-06-28 | 太原晋西春雷铜业有限公司 | Heat treatment process of high-strength and high-hardness Cu-Ni-Co-Si alloy strip |
| CN115386766A (en) * | 2022-08-11 | 2022-11-25 | 中国科学院金属研究所 | Cu-Ni-Si-Cr-Mg quinary copper alloy and preparation method thereof |
| CN116065053B (en) * | 2023-04-03 | 2023-07-11 | 凯美龙精密铜板带（河南）有限公司 | Copper alloy and preparation method thereof |
| CN116555625B (en) * | 2023-05-08 | 2024-07-19 | 大连理工大学 | Multi-scale multiphase coherent precipitation strengthening Cu-Ni-Al-Co-Cr-Ti high-temperature-resistant copper alloy and preparation method thereof |
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