CN104630556B - High anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity and preparation method thereof - Google Patents
High anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity and preparation method thereof；Belong to elastic alloy preparing technical field.Alloy of the present invention by mass percentage, including Ni:6.0～7.5%, Si:1.0～1.4%, Nb:0.8～1.2%, Sn:0.5～0.8%；Mg:0.1～0.15%, Cr:0.1～0.15%, surplus is Cu and inevitable impurity.Alloy preparation process includes: the step such as melting, semi-continuous casting, homogenizing annealing, hot rolling, cold rolling, solid solution, combination aging (Pre-aging treatment+cold rolling+Ageing Treatment), finish rolling, process annealing.The high anti-corrosion CuNiSiNbSn series elastic copper alloy of ultra-high-strength/tenacity prepared by the present invention meets the requirement of multiple electrically conductive elastic device, is applicable to electron and electrician, auto industry and ocean and transports the ultra-high-strength/tenacity height corrosion-resistant conductive elastic element needed for industry.
Description
Technical field
The present invention relates to the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity and preparation side thereof
Method, particularly to a kind of CuNiSiNbSn system sprung copper with superhigh intensity, high tenacity, high corrosion resistance
Alloy and preparation method thereof；Belong to elastic alloy preparing technical field.
Background technology
Conductive Elastic Alloy be electron and electrician, machine instrumentation, ocean transport, indispensable in auto industry etc.
Important materials.It is widely used in manufacturing various elastic components and parts, as microswitch, diaphragm, bellows,
Elastic sensing element, energy-storage travelling wave tube, frequency element, reed, repeater etc..The performance of flexible member determines
Precision, reliability and life-span that instrument is overall.Along with modern industry and the development of science and technology, a new generation
Electrical equipment industry requiring, novel elastic material has high rigidity, high intensity, high tenacity, low-resistivity, high resistance to
The features such as erosion property, high elastic modulus.Owing to current elastic alloy is mainly two classes, a class refers to Fe-Ni-Cr
System, Ni-Cr system, Ni-Cr-Nb system, Ni-Co-Cr system, Nb-Ti system and Fe-Ni-Co system etc., such alloy
Feature be hardness and intensity superelevation, stress relaxation-resistant ability is strong, but its electrical conductivity is the lowest.Another kind of it is
Tin-phosphor bronze and beryllium copper etc., tin-phosphor bronze intensity is low, beryllium-bronze electric conductivity, intensity, corrosion resistance, wear-resisting
The excellent combination properties such as property, but the beryllium steam that produces in production process of beryllium-bronze and beryllium dirt can be detrimental to health,
Pollute environment；And beryllium-bronze stress relaxation-resistant ability is low when using under higher than 150 DEG C of environment, job stability
Difference so that it uses temperature to be below 150 DEG C.Therefore, the high anti-corrosion elasticity of the ultra-high-strength/tenacity of development of new
Alloy is the most imperative.The later stage eighties, the former Soviet Union, the U.S., Japan and China have been developed over Cu-Ni-Sn,
Cu-Ti, " Herba Carlinae biebersteinii is grand ", " card thick forest ", MH Ц 15-20, NO.131, No.538 and spedex alloy etc. are novel
Elastic copper alloy without beryllium.These alloys have at a relatively high intensity (>=1000MPa), and at 150 DEG C still
So keep higher intensity and stable elastic performance, but its electrical conductivity is the lowest, no more than 15%IACS.
Cu-Ni-Si alloy is of great interest as the elastomeric material that can replace beryllium-bronze, " superelevation
By force, high connductivity CuNiSiSnMg series elastic copper alloy and preparation method thereof " (ZL 200810032004.2), " one
Kind superelevation is strong, high resistance to stress relaxes CuNiSiAl series elastic copper alloy preparation method " (ZL201010571290.7)
" a kind of CuNiSi series elastic copper alloy and preparation method thereof " (CN 201310025570.1) individually discloses
Three kinds of strong high resistance to stress of superelevation relax CuNiSi series elastic copper alloy and preparation method thereof.(1) patent disclosed in
" superelevation strong, high connductivity CuNiSiSnMg series elastic copper alloy and preparation method thereof " (200810032004.2)
Provide a kind of CuNiSiSnMgZr alloy there is the anti-of the intensity of superelevation, good electric conductivity and excellence should
Power relaxation property.Its described antivacuum secondary remelting can bring the energy huge in industrialization production process to disappear
Consumption.(2) patent " a kind of superelevation is strong, high resistance to stress relaxes CuNiSiAl series elastic copper alloy preparation method "
(ZL201010571290.7) preparation method described in patent disclosed in, makes to prepare alloy and has good combining
Close performance, but the percentage elongation of alloy is on the low side, and lack the description of industrialization preparation technology.(3) patent " one
Kind of CuNiSi series elastic copper alloy and preparation method thereof " institute in patent disclosed in (CN201310025570.1)
The composition stated and preparation technology, the alloy property making preparation is excellent, but equally exist percentage elongation on the low side and lack
The problem of the description of industrialization preparation technology.And the corrosion resisting property of alloy described in above-mentioned patent is all without describing.On
State the copper alloy elastomeric material of patent report and all fail to reach the high tenacity needed for making the device long-life and height is anti-corrosion
The requirement of performance.
Alloy strength is to ensure safety during alloy is on active service with the height of the product (referred to as strength and ductility product) of plasticity
The key being on active service and important indicator, this product is the biggest, and during alloy uses, antibody Monoclonal tolerance limit is the biggest, device
Part service reliability is the highest.It addition, elastic components and parts are much in navigation device and sea frock are standby, its
Corrosion proof quality is also one of important indicator determining its service life and safety.Due to existing sprung copper
Alloy compositions and/or the reason of preparation technology, cause existing elastic copper alloy cannot have the same of high intensity
Time be also equipped with excellent corrosion resistance and meet require plasticity and toughness, seriously constrain a new generation electrical equipment industry send out
Exhibition.Therefore, need a kind of mechanical property of invention, electric conductivity, plasticity and toughness and corrosion resisting property badly and all can meet new
Type elastic copper alloy technology of preparing.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is provided that a kind of intensity height, excellent conductivity, component be reasonable,
Alloying level height, good toughness, nonhazardous, the CuNiSiNbSn series elastic copper alloy of high corrosion resistance and
Preparation method.
The high anti-corrosion CuNiSiNbSn series elastic copper alloy of one ultra-high-strength/tenacity of the present invention；By percentage to the quality
Including following component:
Ni:6.0～7.5%, preferably 6.0-6.5%, more preferably 6.2%；
Si:1.0～1.4%, preferably 1.0-1.2%, more preferably 1.1%；
Nb:0.8～1.2%, preferably 0.8-1.0%, more preferably 1.0%；
Sn:0.5～0.8%, preferably 0.5-0.7%, more preferably 0.6%；
Mg:0.1～0.15%, preferably 0.1-0.13%, more preferably 0.12%；
Cr:0.1～0.15%, preferably 0.1-0.131%, more preferably 0.12%；
Surplus is Cu and inevitable impurity.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, bag
Include described step:
Step one melting and semi-continuous casting
Join after taking cathode copper, nickel source, silicon source, niobium source, Xi Yuan, magnesium source, chromium source by the alloy compositions of design,
Carry out melting, semi-continuous casting, obtain ingot casting；
Step 2 Homogenization Treatments
At a temperature of 840-880 DEG C, step one gained ingot casting is carried out Homogenization Treatments；Obtain No. I casting
Ingot；
Step 3 hot rolling cogging
After removing the surface impurity of No. I ingot casting, carry out hot rolling cogging, obtain No. I blank；During hot rolling cogging,
Controlling start rolling temperature is 850～920 DEG C, preferably 850-900 DEG C, more preferably 880-900 DEG C；Eventually
Rolling temperature is 700～800 DEG C；
The cold-rolling treatment of No. I blank of step 4
No. I blank of step 3 gained is carried out cold rolling, obtains No. II blank；Controlling total deformation time cold rolling is
55-65%；
The solution hardening of No. II blank of step 5 processes
At 940-960 DEG C, after No. II blank of step 4 gained is carried out solution treatment, quenching, obtain solid solution
Quenching state slab；
The Pre-aging treatment of step 6 as-quenched temper slab
At 350-450 DEG C, step 5 gained as-quenched temper slab is carried out Pre-aging treatment, when obtaining pre-
Effect processes slab；
Step 7 Pre-aging treatment slab cold rolling
Step 6 gained Pre-aging treatment slab is carried out total deformation is the cold rolling of 55-65%, obtains cold rolling
Band；
The Ageing Treatment of step 8 cold rolling strap
At 450-500 DEG C, preferably 465-480 DEG C, step 7 gained cold rolling strap is carried out Ageing Treatment；?
To timeliness band；
The finish rolling of step 9 timeliness band and annealing
After step 8 gained timeliness band is carried out finish rolling, clean up, and anneal in 150～250 DEG C,
Cooling, obtains finished product；The total deformation of described finish rolling is less than or equal to 15%.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
In rapid one,
Described nickel source is electrolytic nickel；
At least one in copper silicon intermediate alloy, electrolysis elemental silicon of described silicon source, preferably elemental silicon；
At least one in copper and tin intermediate alloy, electrolysis simple substance stannum of described Xi Yuan；
At least one in copper niobium intermediate alloy, electrolysis simple substance niobium of described niobium source, preferably simple substance niobium；
At least one in copper magnesium intermediate alloy, electrolysis elemental magnesium of described magnesium source；
At least one in copper chromium intermediate alloy, electrolysis simple substance chromium of described chromium source.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
Melting described in rapid one is:
After having joined cathode copper, nickel source, silicon source, niobium source, Xi Yuan, magnesium source, chromium source by the alloy compositions of design
First will join the cathode copper that takes to add in smelting furnace, and be warming up to 1300-1340 DEG C, be subsequently adding join take nickel source,
Silicon source, niobium source, Xi Yuan, chromium source, after nickel source, silicon source, niobium source, Xi Yuan, chromium source are completely melt, fall
Temperature is to 1250-1280 DEG C and adds the continuation melting of magnesium source；Obtain melt.
In actual mechanical process, during melting, Medium frequency induction can be used to carry out melting under air atmosphere,
But need with solid carbon as coverture；Described coverture is preferably Linesless charcoal.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
It is cast into semi-continuous casting described in rapid one；Its operation is: after being stood by melt, water at 1250-1280 DEG C
Casting；During casting control casting speed be 40-45mm/min, cooling water pressure 0.01-0.05MPa.In order to protect
Demonstrate,prove more preferable effect, calcining charcoal powder can be used to make coverture.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
The time of Homogenization Treatments described in rapid two is 8-12 hour.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, heat
Before rolling cogging, can be processed by Double Milling face and remove surface impurity.When milling face processes, control the milling of one side
Face thickness is 1-8mm；It is preferably 5mm.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
Described in rapid three during hot rolling cogging, control total deformation is 55-80%, preferably 60-80%, further preferably
For 70-80%.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
In rapid four, during the cold-rolling treatment of No. I blank, control total deformation is 55-65%, preferably 58-62%, enters
One step is preferably 60%；Control pass deformation is 20-35%；It is preferably 25-35%, more preferably
27-33%.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, when
After the cold-rolling treatment of No. I blank completes, adjust its shape by trimming.The trimming amount of institute's trimming is: 5-30mm/
Limit, preferably 20mm/ limit.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
In rapid five, the solution time of No. II blank is 30-300min, preferably 60-240min, further preferably
For 120-180min；After solid solution, use water spray quenching.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
In rapid six, during the Pre-aging treatment of as-quenched temper slab, the control time is 5-120min, is preferably
10-60min, more preferably 15-30min.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
In rapid seven, during Pre-aging treatment slab cold rolling, control pass deformation is 20-30%.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
In rapid eight, the aging time of cold rolling strap is 30-240min, preferably 30-120min, the most excellent
Elect 60-90min as.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, step
In rapid nine, during finish rolling timeliness band, control pass deformation is 5-15%, preferably 10-12%, further
It is preferably 10%；After finish rolling completes, carry out, at 150～250 DEG C, anneal 15-60min, preferably 20-60min,
More preferably 30-60min.Last air cooling obtains finished product.
In actual mechanical process, finish rolling also needs to use cleanout fluid to be carried out after completing.
The preparation method of the high anti-corrosion CuNiSiNbSn series elastic copper alloy of a kind of ultra-high-strength/tenacity of the present invention, institute
The tensile strength obtaining product is 1000-1300MPa, yield strength is 890-967MPa, percentage elongation is
4.5-5.5%, electrical conductivity are 25.0-30.1%IACS, the stress relaxation rate of 200 DEG C/100h is 7.8-11.0%,
Corrosion rate≤0.02mm/a in 3.5%NaCl solution.
Principle and advantage
Alloy compositions designed by the present invention is reasonable, intensity is high, plasticity and toughness are good, electric conductivity is excellent, corrosion resistance
Can and stress relaxation resistance excellent, it is possible to meet that Novel electric appliance industry Elastic components and parts are high-strength, high-ductility,
High anti-corrosion demand, is the preferable replacer of beraloy.The present invention relates to alloy and preparation technology is suitable for
In large-scale industrial production, can be applicable to manufacture accurate elastic element in modern electronics industry.This patent is created
Have employed the technique of combination aging and the compound interpolation of Nb, Sn alloying element, relative to existing bullet to new property
Property copper alloy and preparation technology thereof, the alloy product of gained of the present invention have simultaneously high intensity, high conductivity,
The advantage such as high-plasticity and corrosion resisting property.
The present invention is by rational design of components and have employed the preparation technology matched with component, in component
With under the synergism of preparation technology, obtained that component is reasonable, intensity is high, good toughness, excellent conductivity,
The CuNiSiNbSn series elastic copper alloy of the nonhazardous that corrosion resisting property is good, stress relaxation resistance is excellent.
In the present invention, the trace Nb of interpolation during hot rolling and follow-up combination aging, Nb mainly with
The form of nanoscale Nb particle separates out from matrix, and precipitation particles can be thus the strongest with anchoring dislocation motion
Alloy.Owing to Nb particle has high-temperature stability, ag(e)ing process is difficult to roughening, so that this alloy
High-temperature behavior excellent, particularly its stress relaxation resistance is greatly improved.Meanwhile, the precipitation institute of Nb
The local stress brought can promote that (described combination aging process is technical solution of the present invention to combination aging process
In step 6, the combination of seven, eight, i.e. Pre-aging treatment+cold rolling+Ageing Treatment) in Ni2The precipitation of Si phase.
Ni2The precipitation of Si phase can not only improve alloy strength；And due to solute atoms Ni, Si precipitation from matrix,
Cause matrix purification, so that the electrical conductivity of alloy is effectively promoted.
The Sn element that the present invention is added, can significantly improve the resistance to of alloy under the synergism of other component
Erosion performance, meanwhile, Sn solid solution in copper is less on the impact of its electrical conductivity, but the effect of solution strengthening
Very well, this improves the stress relaxation resistance of alloy the most to a certain extent.
Preageing in combination aging is that lack time effect processes, the nanoscale Ni of precipitation2Si phase and nano level Nb
Particle with the most cold roller and deformed during dislocation interactions, change dislocation configuration distribution, the most relatively
In high-temperature ag(e)ing process, with this Ni2Si phase is core, promotes new Ni2Si phase is sufficiently analysed from matrix
Go out.Ni2The precipitation of Si phase can make Copper substrate obtain purification, and then puies forward heavy alloyed electrical conductivity.High density simultaneously
Ni2The precipitation of Si phase also makes the intensity of alloy and stress relaxation resistance be improved.The present invention is in timeliness mistake
In journey (i.e. in step 8) used by aging temp higher, but due to during preageing separate out Ni2Si phase and
The pinning effect of Nb phase, many changes or the fine microstructures of recrystallization, while making alloy keep high intensity, by
Higher in aging temp, alloy residual stress and deformation defect reduce, and alloy corrosion resistance can improve with toughness.
In a word, due to the fact that design of components is reasonable, hot rolling, cold rolling, solid solution, combination aging (preageing
Process+cold rolling+Ageing Treatment), finish rolling, the reasonable selection of process annealing operation, make CuNiSiNbSn system bullet
Property copper alloy keeping that high-strength, high resistance to stress is lax, on the premise of satisfactory electrical conductivity, plasticity and toughness and corrosion resistance
It is greatly improved.
Detailed description of the invention
Embodiment 1:
According to the component corresponding to embodiment 1 in table 1, technological process as described in embodiment 1 is prepared,
In preparation process, each conditional parameter is shown in Table each conditional parameter in 1 corresponding to embodiment 1；
Its specific operation process is as follows:
Step one melting and casting
Join by the alloy compositions of design and take cathode copper, electrolytic nickel (nickel source), elemental silicon (silicon source), simple substance niobium
After (niobium source), electrolytic tin (Xi Yuan), copper-magnesium intermediate alloy (magnesium source), copper-chromium intermediate alloy (chromium source),
First add joining the cathode copper taken in medium frequency induction melting furnace, and be warming up to 1300-1320 DEG C, be subsequently adding and join
The electrolytic nickel that takes, elemental silicon, simple substance niobium, electrolytic tin, copper-chromium intermediate alloy；Wait that added component is complete
After fusing, it is cooled to 1250-1280 DEG C and adds copper-magnesium intermediate alloy continuation melting；Obtain melt；During melting,
Calcining charcoal powder is used to make coverture；
Stand melt, then use semicontinuous casting technique to cast, it is thus achieved that rectangle ingot；Control during casting
Cast temperature is 1250-1270 DEG C, and casting speed is 40mm/min, cooling water pressure 0.02MPa, casting
During use white carbon black make coverture；
Step 2: homogenizing annealing
Rectangle ingot after homogenizing annealing 8 hours, is obtained No. I ingot casting at a temperature of 850-860 DEG C；
Step 3 hot rolling cogging
After removing the surface impurity of No. I ingot casting, carry out hot rolling cogging, obtain No. I blank；During hot rolling cogging,
Control start rolling temperature be 900 DEG C, finishing temperature be 700 DEG C；The surface impurity removing No. I ingot casting is by double
Facing cut face processes realization, and when milling face processes, controlling milling face thickness is 5mm/ face；Control total during hot rolling cogging
Deflection is 70%, and controlling pass deformation is 35%；
The cold-rolling treatment of No. I blank of step 4
No. I blank of step 3 gained is carried out cold rolling, obtains No. II blank；Controlling total deformation time cold rolling is
65%；Controlling pass deformation is 33%；
The solution hardening of No. II blank of step 5 processes
No. II blank, after trimming processes, carries out solution treatment 180min at 950 DEG C；After carry out water spray quenching,
Obtain as-quenched temper slab；Controlling trimming amount when trimming processes is: 20mm/ limit；
The Pre-aging treatment of step 6 as-quenched temper slab
At 400 DEG C, step 5 gained as-quenched temper slab is carried out Pre-aging treatment 30min, obtains pre-
Ageing Treatment slab；
Step 7 Pre-aging treatment slab cold rolling
Step 6 gained Pre-aging treatment slab is carried out total deformation be 55% cold rolling, obtain cold rolling strap；
Controlling pass deformation time cold rolling is 28%；
The Ageing Treatment of step 8 cold rolling strap
At 480 DEG C, step 7 gained cold rolling strap is carried out Ageing Treatment 90min；Obtain timeliness band；
The finish rolling of step 9 timeliness band and annealing
Step 8 gained timeliness band is carried out finish rolling to 4.8mm, clean up, and move back in 180 DEG C
Fire 60min, air cooling obtains finished product；The pass deformation of described finish rolling is 10%.
Detection gained end properties, its detection project and performance parameter are shown in Table in 1 corresponding to embodiment 1
Relevant parameter.
Embodiment 2:
According to the component corresponding to embodiment 2 in table 1, technological process as described in embodiment 2 is prepared,
In preparation process, each conditional parameter is shown in Table each conditional parameter in 1 corresponding to embodiment 2；
Its specific operation process is as follows:
Step one melting and casting
Join by the alloy compositions of design and take cathode copper, electrolytic nickel (nickel source), elemental silicon (silicon source), simple substance niobium
After (niobium source), electrolytic tin (Xi Yuan), copper-magnesium intermediate alloy (magnesium source), copper-chromium intermediate alloy (chromium source),
First add joining the cathode copper taken in medium frequency induction melting furnace, and be warming up to 1300-1320 DEG C, be subsequently adding and join
The electrolytic nickel that takes, elemental silicon, simple substance niobium, electrolytic tin, copper-chromium intermediate alloy；Wait that added component is complete
After fusing, it is cooled to 1250-1280 DEG C and adds copper-magnesium intermediate alloy continuation melting；Obtain melt；During melting,
Use calcining charcoal powder coverture；
Stand melt, then use semicontinuous casting technique to cast, it is thus achieved that rectangle ingot；Control during casting
Cast temperature is 1250-1270 DEG C, and casting speed is 42mm/min, cooling water pressure 0.03MPa, casting
During use white carbon black make coverture；
Step 2: homogenizing annealing
Rectangle ingot after homogenizing annealing 10 hours, is obtained No. I ingot casting at a temperature of 860-870 DEG C；
Step 3 hot rolling cogging
After removing the surface impurity of No. I ingot casting, carry out hot rolling cogging, obtain No. I blank；During hot rolling cogging,
Control start rolling temperature be 900 DEG C, finishing temperature be 700 DEG C；The surface impurity removing No. I ingot casting is by double
Facing cut face processes realization, and when milling face processes, controlling milling face thickness is 5mm/ face；Control total during hot rolling cogging
Deflection is 80%, and controlling pass deformation is 40%；
The cold-rolling treatment of No. I blank of step 4
No. I blank of step 3 gained is carried out cold rolling, obtains No. II blank；Controlling total deformation time cold rolling is
60%；Controlling pass deformation is 30%；
The solid solution of No. II blank of step 5, Quenching Treatment
No. II blank, after trimming processes, carries out solution treatment 180min at 960 DEG C；After carry out water spray quenching,
Obtain as-quenched temper slab；Controlling trimming amount when trimming processes is: 20mm/ limit；
The Pre-aging treatment of step 6 as-quenched temper slab
At 400 DEG C, step 5 gained as-quenched temper slab is carried out Pre-aging treatment 30min, when obtaining pre-
Effect processes slab；
Step 7 Pre-aging treatment slab cold rolling
Step 6 gained Pre-aging treatment slab is carried out total deformation be 60% cold rolling, obtain cold rolling strap；
Controlling pass deformation time cold rolling is 30%；
The Ageing Treatment of step 8 cold rolling strap
At 480 DEG C, step 7 gained cold rolling strap is carried out Ageing Treatment 90min；Obtain timeliness band；
The finish rolling of step 9 timeliness band and annealing
Step 8 gained timeliness band is carried out finish rolling to 4.8mm, clean up, and move back in 180 DEG C
Fire 60min, air cooling obtains finished product；The pass deformation of described finish rolling is 5%.
Detection gained end properties, its detection project and performance parameter are shown in Table being correlated with corresponding to embodiment 2 in 1
Parameter.
Embodiment 3:
According to the component corresponding to embodiment 3 in table 1, technological process as described in embodiment 3 is prepared,
In preparation process, each conditional parameter is shown in Table each conditional parameter in 1 corresponding to embodiment 3；
Its specific operation process is as follows:
Step one melting and casting
Join by the alloy compositions of design and take cathode copper, electrolytic nickel (nickel source), elemental silicon (silicon source), simple substance niobium
After (niobium source), electrolytic tin (Xi Yuan), copper-magnesium intermediate alloy (magnesium source), copper-chromium intermediate alloy (chromium source),
First add joining the cathode copper taken in medium frequency induction melting furnace, and be warming up to 1310-1330 DEG C, be subsequently adding and join
The electrolytic nickel that takes, elemental silicon, simple substance niobium, electrolytic tin, copper-chromium intermediate alloy；Wait that added component is complete
After fusing, it is cooled to 1250-1280 DEG C and adds copper-magnesium intermediate alloy continuation melting；Obtain melt；During melting,
Calcining charcoal powder is used to make coverture；
Stand melt, then use semicontinuous casting technique to cast, it is thus achieved that rectangle ingot；Control during casting
Cast temperature is 1260-1280 DEG C, and casting speed is 45mm/min, cooling water pressure 0.04MPa, casting
During use white carbon black make coverture；
Step 2: homogenizing annealing
Rectangle ingot after homogenizing annealing 12 hours, is obtained No. I ingot casting at a temperature of 865-875 DEG C；
Step 3 hot rolling cogging
After removing the surface impurity of No. I ingot casting, carry out hot rolling cogging, obtain No. I blank；During hot rolling cogging,
Control start rolling temperature be 900 DEG C, finishing temperature be 700 DEG C；The surface impurity removing No. I ingot casting is by double
Facing cut face processes realization, and when milling face processes, controlling milling face thickness is 5mm/ face；Control total during hot rolling cogging
Deflection is 80%, and controlling pass deformation is 40%；
The cold-rolling treatment of No. I blank of step 4
No. I blank of step 3 gained is carried out cold rolling, obtains No. II blank；Controlling total deformation time cold rolling is
55%；Controlling pass deformation is 27%；
The solid solution of No. II blank of step 5, Quenching Treatment
No. II blank, after trimming processes, carries out solution treatment 180min at 960 DEG C；After carry out water spray quenching,
Obtain as-quenched temper slab；Controlling trimming amount when trimming processes is: 20mm/ limit；
The Pre-aging treatment of step 6 as-quenched temper slab
At 400 DEG C, step 5 gained as-quenched temper slab is carried out Pre-aging treatment 30min, obtains pre-
Ageing Treatment slab；
Step 7 Pre-aging treatment slab cold rolling
Step 6 gained Pre-aging treatment slab is carried out total deformation be 55% cold rolling, obtain cold rolling strap；
Controlling pass deformation time cold rolling is 27%；
The Ageing Treatment of step 8 cold rolling strap
At 480 DEG C, step 7 gained cold rolling strap is carried out Ageing Treatment 90min；Obtain timeliness band；
The finish rolling of step 9 timeliness band and annealing
Step 8 gained timeliness band is carried out finish rolling to 4.8mm, clean up, and move back in 180 DEG C
Fire 60min, air cooling obtains finished product；The pass deformation of described finish rolling is 10%.
Detection gained end properties, its detection project and performance parameter are shown in Table being correlated with corresponding to embodiment 3 in 1
Parameter.
Embodiment 4:
Step one melting and casting
Join by the alloy compositions of design and take cathode copper, electrolytic nickel (nickel source), elemental silicon (silicon source), simple substance niobium
After (niobium source), electrolytic tin (Xi Yuan), copper-magnesium intermediate alloy (magnesium source), copper-chromium intermediate alloy (chromium source),
First add joining the cathode copper taken in medium frequency induction melting furnace, and be warming up to 1310-1330 DEG C, be subsequently adding and join
The electrolytic nickel that takes, elemental silicon, simple substance niobium, simple substance stannum, copper-chromium intermediate alloy；Wait that added component is complete
After fusing, it is cooled to 1260-1280 DEG C and adds copper-magnesium intermediate alloy continuation melting；Obtain melt；During melting,
Calcining charcoal powder is used to make coverture；
Stand melt, then use semicontinuous casting technique to cast, it is thus achieved that rectangle ingot；Control during casting
Cast temperature is 1260-1280 DEG C, and casting speed is 45mm/min, cooling water pressure 0.05MPa, casting
During use white carbon black make coverture；
Step 2: homogenizing annealing
Rectangle ingot after homogenizing annealing 12 hours, is obtained No. I ingot casting at a temperature of 870-880 DEG C；
Step 3 hot rolling cogging
After removing the surface impurity of No. I ingot casting, carry out hot rolling cogging, obtain No. I blank；During hot rolling cogging,
Control start rolling temperature be 900 DEG C, finishing temperature be 700 DEG C；The surface impurity removing No. I ingot casting is by double
Facing cut face processes realization, and when milling face processes, controlling milling face thickness is 5mm/ face；Control total during hot rolling cogging
Deflection is 80%, and controlling pass deformation is 40%；
The cold-rolling treatment of No. I blank of step 4
No. I blank of step 3 gained is carried out cold rolling, obtains No. II blank；Controlling total deformation time cold rolling is
55%；Controlling pass deformation is 27%；
The solid solution of No. II blank of step 5, Quenching Treatment
No. II blank, after trimming processes, carries out solution treatment 180min at 960 DEG C；After carry out water spray quenching,
Obtain as-quenched temper slab；Controlling trimming amount when trimming processes is: 20mm/ limit；
The Pre-aging treatment of step 6 as-quenched temper slab
At 400 DEG C, step 5 gained as-quenched temper slab is carried out Pre-aging treatment 30min, obtains pre-
Ageing Treatment slab；
Step 7 Pre-aging treatment slab cold rolling
Step 6 gained Pre-aging treatment slab is carried out total deformation be 60% cold rolling, obtain cold rolling strap；
Controlling pass deformation time cold rolling is 30%；
The Ageing Treatment of step 8 cold rolling strap
At 480 DEG C, step 7 gained cold rolling strap is carried out Ageing Treatment 90min；Obtain timeliness band；
The finish rolling of step 9 timeliness band and annealing
Step 8 gained timeliness band is carried out finish rolling to 4.8mm, clean up, and move back in 180 DEG C
Fire 60min, air cooling obtains finished product；The pass deformation of described finish rolling is 15%.
Detection gained end properties, its detection project is shown in Table the relevant parameter that embodiment in 2 is corresponding with performance parameter.
Table 1
Note: stress relaxation rate (%) is the static stress relaxation rate that laboratory sample 200 DEG C loads 100 hours
As can be seen here, proprietary alloy design of components of the present invention rationally, excellent performance.Of the present invention group
Close aging technique relative to common thermomechanical treatment process, it is possible to obtain the plasticity and toughness, high anti-corrosion more increased
Performance, and its high temperature stress relaxation resistance is much better than the elastic copper alloy of active service, it is adaptable to make new one
For electrical equipment industry high-performance elastic components and parts.
Claims (10)
1. the high anti-corrosion CuNiSiNbSn series elastic copper alloy of ultra-high-strength/tenacity；Its feature exists
In, by percentage to the quality, including following component:
Ni:6.0～7.5%；
Si:1.0～1.4%；
Nb:0.8～1.2%；
Sn:0.5～0.8%；
Mg:0.1～0.15%；
Cr:0.1～0.15%；
Surplus is Cu and inevitable impurity.
2. prepare the high anti-corrosion CuNiSiNbSn system of ultra-high-strength/tenacity as claimed in claim 1 for one kind
The method of elastic copper alloy；It is characterized in that, including described step:
Step one melting and semi-continuous casting
Join by the alloy compositions of design and take cathode copper, nickel source, silicon source, niobium source, Xi Yuan, magnesium
Behind source, chromium source, carry out melting, semi-continuous casting, obtain ingot casting；
Step 2 Homogenization Treatments
At a temperature of 840-880 DEG C, step one gained ingot casting is carried out Homogenization Treatments；?
To No. I ingot casting；
Step 3 hot rolling cogging
After removing the surface impurity of No. I ingot casting, carry out hot rolling cogging, obtain No. I blank；
During hot rolling cogging, control start rolling temperature be 850～920 DEG C, finishing temperature be 700～800 DEG C；
The cold-rolling treatment of No. I blank of step 4
No. I blank of step 3 gained is carried out cold rolling, obtains No. II blank；Control time cold rolling
Total deformation is 55-65%；
The solution hardening of No. II blank of step 5 processes
At 940-960 DEG C, after No. II blank of step 4 gained is carried out solution treatment, quenching,
Obtain as-quenched temper slab；
The Pre-aging treatment of step 6 as-quenched temper slab
At 350～450 DEG C, step 5 gained as-quenched temper slab is carried out Pre-aging treatment,
Obtain Pre-aging treatment slab；
Step 7 Pre-aging treatment slab cold rolling
Step 6 gained Pre-aging treatment slab is carried out total deformation is the cold rolling of 40-80%,
Obtain cold rolling strap；
The Ageing Treatment of step 8 cold rolling strap
At 450-500 DEG C, step 7 gained cold rolling strap is carried out Ageing Treatment；Obtain timeliness band
Material；
The finish rolling of step 9 timeliness band and annealing
After step 8 gained timeliness band is carried out finish rolling, clean up, and in 150～250
DEG C anneal, cooling, obtain finished product；The total deformation of described finish rolling is less than or equal to 15%.
The high anti-corrosion CuNiSiNbSn system of a kind of ultra-high-strength/tenacity the most according to claim 2
The preparation method of elastic copper alloy, it is characterised in that: in step one,
Described nickel source is electrolytic nickel；
At least one in copper silicon intermediate alloy, electrolysis elemental silicon of described silicon source；
At least one in copper and tin intermediate alloy, electrolysis simple substance stannum of described Xi Yuan；
At least one in copper niobium intermediate alloy, electrolysis simple substance niobium of described niobium source；
At least one in copper magnesium intermediate alloy, electrolysis elemental magnesium of described magnesium source；
At least one in copper chromium intermediate alloy, electrolysis simple substance chromium of described chromium source.
The high anti-corrosion CuNiSiNbSn system of a kind of ultra-high-strength/tenacity the most according to claim 2
The preparation method of elastic copper alloy, it is characterised in that；Melting described in step one is:
Cathode copper, nickel source, silicon source, niobium source, Xi Yuan, magnesium has been joined by the alloy compositions of design
First add joining the cathode copper taken in smelting furnace behind source, chromium source, and be warming up to 1300-1340 DEG C,
Be subsequently adding join take nickel source, silicon source, niobium source, Xi Yuan, chromium source, treat nickel source, silicon source, niobium
After source, Xi Yuan, chromium source are completely melt, it are cooled to 1250-1280 DEG C and add magnesium source and continue molten
Refining；Obtain melt.
The high anti-corrosion CuNiSiNbSn of a kind of ultra-high-strength/tenacity the most according to claim 2
The preparation method of series elastic copper alloy, it is characterised in that；The behaviour of semi-continuous casting described in step one
As: after melt is stood, cast at 1250-1280 DEG C；Casting speed is controlled during casting
Degree is 40-45mm/min, cooling water pressure 0.01-0.05MPa.
The high anti-corrosion CuNiSiNbSn of a kind of ultra-high-strength/tenacity the most according to claim 2
The preparation method of series elastic copper alloy, it is characterised in that:
The time of Homogenization Treatments described in step 2 is 8-12 hour；
Described in step 3 during hot rolling cogging, control total deformation is 55-80%；
In step 4, during the cold-rolling treatment of No. I blank, control pass deformation is 20-35%.
The high anti-corrosion CuNiSiNbSn of a kind of ultra-high-strength/tenacity the most according to claim 2
The preparation method of series elastic copper alloy, it is characterised in that: in step 5, the solid solution of No. II blank
Time is 30-300min；After solid solution, use water spray quenching.
The high anti-corrosion CuNiSiNbSn of a kind of ultra-high-strength/tenacity the most according to claim 2
The preparation method of series elastic copper alloy, it is characterised in that:
In step 6, during the Pre-aging treatment of as-quenched temper slab, the control time is
5-120min；
In step 7, during Pre-aging treatment slab cold rolling, controlling pass deformation is
20-30%；
In step 8, the aging time of cold rolling strap is 30-240min.
The high anti-corrosion CuNiSiNbSn of a kind of ultra-high-strength/tenacity the most according to claim 2
The preparation method of series elastic copper alloy, it is characterised in that:
In step 9, during finish rolling timeliness band, control pass deformation is 5-15%；Finish rolling
After completing, carry out, at 150～250 DEG C, the 15-60min that anneals；Last air cooling obtains finished product.
10. anti-corrosion according to a kind of ultra-high-strength/tenacity height described in claim 2-9 any one
The preparation method of CuNiSiNbSn series elastic copper alloy, it is characterised in that:
The tensile strength of products obtained therefrom is 1000-1300MPa, yield strength is
890-967MPa, percentage elongation are 4.5-5.5%, electrical conductivity is 25.0-30.1%IACS, 200 DEG C
The stress relaxation rate of/100h is corrosion rate≤0.02 in 7.8-11.0%, 3.5%NaCl solution
mm/a。
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| CN114150123B (en) * | 2021-11-24 | 2024-03-12 | 中铝科学技术研究院有限公司 | Method for effectively improving alloy strength and conductivity |
| CN114293062A (en) * | 2021-12-09 | 2022-04-08 | 昆明冶金研究院有限公司北京分公司 | High-strength conductive anti-softening Cu-Ti alloy for elastic component and preparation method thereof |
| CN114507793B (en) * | 2022-01-24 | 2022-12-09 | 中南大学 | High-strength high-conductivity Cu-Zn-Cr-Zr copper alloy, and preparation method and application thereof |
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