CN106676314B - A kind of preparation method of high-strength high-conductivity Cu-Ag alloys - Google Patents

A kind of preparation method of high-strength high-conductivity Cu-Ag alloys Download PDF

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CN106676314B
CN106676314B CN201611240121.9A CN201611240121A CN106676314B CN 106676314 B CN106676314 B CN 106676314B CN 201611240121 A CN201611240121 A CN 201611240121A CN 106676314 B CN106676314 B CN 106676314B
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forging
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ingot
fine copper
cooled
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CN106676314A (en
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解国良
王强松
刘冬梅
刘芳
苑伟
张嘉凝
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GRIMN Engineering Technology Research Institute Co Ltd
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Beijing General Research Institute for Non Ferrous Metals
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/026—Alloys based on copper

Abstract

The invention discloses a kind of preparation methods for the high-strength high-conductivity Cu Ag alloys for belonging to Cu alloy material preparing technical field, semi-solid casting technology is combined especially by solid-liquid double-phase solidification, the supersaturated solid solution of a large amount of Ag is formed in as-cast structure, and refine as-cast microstructure, and then combine multidirectional high temperature cryogenic forging+combination aging technique, improve the distribution of alloy aging precipitated phase, obtain a kind of massive article of 10 Φ 100mm of high-strength high-conductivity Cu Ag alloys Φ, the yield strength of the alloy is up to 600 1100MPa, conductivity is up to 75 100%IACS (International Annealed Copper Standard).

Description

A kind of preparation method of high-strength high-conductivity Cu-Ag alloys
Technical field
The invention belongs to Cu alloy material preparing technical fields.More particularly to a kind of high-strength high-conductivity Cu-Ag is closed The preparation method of gold,
Background technology
With science and technology and industrial expansion, high-strength field system, lead frame, high-speed railway, aerospace etc. very The multi-field requirement to conductor material is more and more high, does not require nothing more than conductive material with excellent electric conductivity, while must also have Standby very high intensity.High-strength highly-conductive Cu-Ag alloys are a kind of two-phase In-situ reaction metal materials, through severe plastic deformation, wherein Eutectic phase or precipitated phase evolve into the fiber reinforcement phase of nano-scale, alloy is made to obtain very high intensity, while keep excellent Good electric conductivity is one of most commonly used high-performance copper alloy material of application prospect.The content of Ag is generally in Cu-Ag alloys 6wt%~30wt%, the Cu-Ag alloys of different Ag contents, there are notable differences for as-cast microstructure form.As Ag in alloy When content is less than 6wt%, alloy structure is substantially only made of single rich Cu phases matrix, is substantially free of the second phase.When Ag contains When measuring as 6wt%-15wt%, as-cast microstructure includes the eutectic of richness Cu phases matrix and richness Cu phases and richness Ag phases lamella composition Body, (Cu/Ag) eutectic are dispersedly distributed in island shape in Cu matrix dendrite gap.Amount containing Ag continues to increase, Cu dendrite gap Gradually form the eutectic body tissue in continuous net-shaped distribution.The as-cast structure of Cu-24wt%Ag mainly include richness Cu phases dendrite with The eutectic of the continuous net-shaped distribution in dendrite gap, this continuous net-shaped eutectic structure are that Cu-Ag alloys obtain very high intensity Principal element.When amount containing Ag is more than 30wt%, Cu matrix grains can be separated by more and more eutectic structures, so as to be rendered as More significant dendroid.
In the recent decade, severe Plastic Deformation Methods such as Equal Channel Angular Pressing (Equal-channel Angular Pressing), accumulation ply rolling (Accumulative Roll Bonding), dynamic plasticity deformation (Dynamic Plastic Deformation), it is multidirectional forging and stamping (Multiple Compression), high pressure torsion (High-pressure Torsion), Violent cold rolling (Severe Cold Rolling) etc. is by numerous studies so that polycrystalline material is with obtaining the thin of crystal grain in alloy Change.But due to the limitation of current preparation method, existing high-performance Cu-Ag alloy materials are mainly the small ruler such as filament, strip Very little exemplar greatly limits the application field of this material.
Invention content
The object of the present invention is to provide a kind of preparation method of high-strength high-conductivity Cu-Ag alloys,
It is characterized in that, the high-strength high-conductivity Cu-Ag alloys are Cu-Ag bianry alloys, main component is： Cu elements are 70-98wt%, and Ag elements are 2-30wt%；Semi-solid casting technology is combined using solid-liquid double-phase solidification, with reference to more To high temperature, cryogenic forging+combination aging technique, for the alloy yield strength of acquisition up to 600-1100MPa, conductivity reaches 75-100% IACS (International Annealed Copper Standard International Annealed Copper Standards)；Its specific process step packet It includes：
(1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, according to mainly into Point：Fine copper ingot is 65-97wt%, and fine copper powder is 1-5wt%, and fine silver ingot is 2-30wt%, wherein the fine copper powder Particle diameter is 0.05-100 μm, and removes its oxide on surface by reduction treatment；First, fine copper ingot and fine silver ingot are mixed 1050-1200 DEG C is heated to after conjunction, it is made to be fused into alloy melt, after keeping the temperature 10min, using argon gas protect melt liquid level and Fine copper powder is added in into alloy melt.1-5min is then sufficiently stirred alloy melt using mechanical agitation mode, while will close Golden melt temperature is reduced to 900-1100 DEG C and keeps the temperature 10min, makes alloy melt rapid partially solidified and forms semisolid Line and staff control, then carries out castable, the melt cast of above-mentioned semisolid line and staff control to the mold using circulating water In be prepared into ingot casting, be cooled to room temperature with the speed of 50-100 DEG C/min；
(2) multidirectional high temperature forging：Alloy cast ingot is heated to 700-720 DEG C, 1h is kept the temperature, by ingot casting along longitudinally, laterally And axial three orthogonal directions carry out forging and molding respectively, forging drafts 20-40% in each direction, then by forging stock sky It is cooled to room temperature；
(3) cryogenic forging+combination aging includes step：
The forging stock of high temperature forging is heated to 500 DEG C by 3.1, keeps the temperature 1h, along longitudinally, laterally and axial three orthogonal directions Forging and molding is carried out respectively, and forging stock is then air-cooled to room temperature by forging drafts 10-30% in each direction；
Forging stock is heated to 400 DEG C by 3.2, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged respectively Shape is caused, forging stock is then air-cooled to room temperature by forging drafts 10-30% in each direction；
Forging stock is heated to 300 DEG C by 3.3, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged respectively Shape is caused, forging stock is then air-cooled to room temperature by forging drafts 10-30% in each direction.
The beneficial effects of the invention are as follows：Semi-solid casting technology is combined by solid-liquid double-phase solidification, refinement as cast condition is shown
Micro-assembly robot improves the distribution of alloy aging precipitated phase, obtains a kind of high-strength high-conductivity Cu-Ag and closes
The massive article of golden Φ 10- Φ 100mm.It has the following advantages that：
(1) fine copper powder is added in Cu-Ag alloy melts, and stirs and forms microstructure of semisolid, passes through this solid-liquid Solidification mode and semi-solid casting method, notable refining alloy as-cast microstructure, and Ag is made more to be dissolved and Cu matrixes In, it lays a good foundation for the microstructure thinning technique during deformation after unloading；
(2) by multidirectional high temperature, cryogenic forging+combination aging technique, the microstructure for making Cu-Ag alloys is constantly thin Change, form micron order even nano level matrix and eutectic phase, and tiny nanoscale richness is formed in ag(e)ing process Silver-colored precipitated phase makes alloy have high intensity.
(3) a kind of yield strength of high-strength high-conductivity Cu-Ag alloys according to the present invention is up to 600- 1100MPa, conductivity is up to 75-100%IACS.
The present invention can prepare the big specification Cu-Ag alloy materials with very high strength and electric conductivity, greatly expand Its application field, the preparation for improving the material is horizontal, has significant technical advantage.
Specific embodiment
The present invention provides a kind of preparation method of high-strength high-conductivity Cu-Ag alloys, especially by solid-liquid double-phase Solidification combines semi-solid casting technology, and with 65-97wt%Cu, 2-30wt%Ag is raw material, adds in fine copper powder, double using solid-liquid Mutually solidification combines semi-solid casting technology, and with reference to multidirectional high temperature, cryogenic forging+combination aging technique, the alloy surrender of acquisition is strong Degree reaches 75-100%IACS (International Annealed Copper Standard states up to 600-1100MPa, conductivity Border Anneal Copper Standard) a kind of high-strength high-conductivity Cu-Ag alloys, the big specification system of a diameter of Φ 10- Φ 100mm Product.Specific embodiment is set forth below to be further described.
Embodiment 1：Cu-12Ag alloys
Cu-12Ag alloys are prepared, are included the following steps：
(1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, into being grouped as Including fine copper ingot be 86wt%, fine copper powder is 2wt% and fine silver ingot is 12wt%；The particle of the wherein described fine copper powder is straight Diameter is 0.5 μm, and removes its oxide on surface by reduction treatment.First, it is heated to after fine copper ingot and fine silver ingot being mixed 1100 DEG C make it be fused into alloy melt, after keeping the temperature 10min, are protected melt liquid level using argon gas and are added in fine copper powder and closed Golden melt.3min is then sufficiently stirred alloy melt, while alloy melt temperature is reduced to 880 using mechanical agitation mode DEG C and keep the temperature, make alloy melt rapid partially solidified and form semisolid line and staff control, then carry out castable.It is above-mentioned The melt cast of semisolid line and staff control is prepared into ingot casting in using the mold of circulating water, cold with the speed of 80 DEG C/min But to room temperature；
(2) multidirectional high temperature forging：Alloy cast ingot is heated to 710 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axis Forging and molding is carried out respectively to three orthogonal directions, and forging stock is then air-cooled to room by forging drafts 30% in each direction Temperature.
(3) cryogenic forging+combination aging：First, the forging stock of high temperature forging is heated to 500 DEG C, keeps the temperature 1h, along vertical Forging and molding is carried out respectively to, transverse direction and axial three orthogonal directions, and forging drafts 30% in each direction then will forging Base is air-cooled to room temperature.
Secondly, forging stock is heated to 400 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 30% in each direction, is then air-cooled to room temperature by forging stock.
Again, forging stock is heated to 300 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 30% in each direction, is then air-cooled to room temperature by forging stock.
The performance of alloy is shown in Table 1.
Embodiment 2：Cu-2Ag alloys
Cu-2Ag alloys are prepared, are included the following steps：
(1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, according to mainly into Point：Fine copper ingot is 97wt%, and fine copper powder is 1wt%, and fine silver ingot is 2wt%, wherein the particle diameter of the fine copper powder It is 100 μm, and its oxide on surface is removed by reduction treatment.First, it is heated to after fine copper ingot and fine silver ingot being mixed 1200 DEG C make it be fused into alloy melt, after keeping the temperature 10min, are protected melt liquid level using argon gas and are added in fine copper powder and closed Golden melt.5min is then sufficiently stirred alloy melt, while alloy melt temperature is reduced to using mechanical agitation mode It 1100 DEG C and keeps the temperature, make alloy melt rapid partially solidified and forms semisolid line and staff control, then carry out castable. The melt cast of above-mentioned semisolid line and staff control is prepared into ingot casting in using the mold of circulating water, with 100 DEG C/min's Speed is cooled to room temperature.
(2) multidirectional high temperature forging：Alloy cast ingot is heated to 720 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axis Forging and molding is carried out respectively to three orthogonal directions, and forging stock is then air-cooled to room by forging drafts 40% in each direction Temperature.
(3) cryogenic forging+combination aging：First, the forging stock of high temperature forging is heated to 500 DEG C, keeps the temperature 1h, along vertical Forging and molding is carried out respectively to, transverse direction and axial three orthogonal directions, and forging drafts 30% in each direction then will forging Base is air-cooled to room temperature.
Secondly, forging stock is heated to 400 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 30% in each direction, is then air-cooled to room temperature by forging stock.
Again, forging stock is heated to 300 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 30% in each direction, is then air-cooled to room temperature by forging stock.
The performance of alloy is shown in Table 1.
Embodiment 3：Cu-6Ag alloys
Cu-6Ag alloys are prepared, are included the following steps：
(1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, according to mainly into Point：Fine copper ingot is 92wt%, and fine copper powder is 2wt%, and fine silver ingot is 6wt%, wherein the particle diameter of the fine copper powder It is 0.05 μm, and its oxide on surface is removed by reduction treatment.First, it is heated to after fine copper ingot and fine silver ingot being mixed 1120 DEG C make it be fused into alloy melt, after keeping the temperature 10min, are protected melt liquid level using argon gas and are added in fine copper powder and closed Golden melt.5min is then sufficiently stirred alloy melt, while alloy melt temperature is reduced to using mechanical agitation mode It 1060 DEG C and keeps the temperature, make alloy melt rapid partially solidified and forms semisolid line and staff control, then carry out castable. The melt cast of above-mentioned semisolid line and staff control is prepared into ingot casting in using the mold of circulating water, with the speed of 50 DEG C/min Degree is cooled to room temperature.
(2) multidirectional high temperature forging：Alloy cast ingot is heated to 720 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axis Forging and molding is carried out respectively to three orthogonal directions, and forging stock is then air-cooled to room by forging drafts 40% in each direction Temperature.
(3) cryogenic forging+combination aging：First, the forging stock of high temperature forging is heated to 500 DEG C, keeps the temperature 1h, along vertical Forging and molding is carried out respectively to, transverse direction and axial three orthogonal directions, and forging drafts 10% in each direction then will forging Base is air-cooled to room temperature.
Secondly, forging stock is heated to 400 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 10% in each direction, is then air-cooled to room temperature by forging stock.
Again, forging stock is heated to 300 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 10% in each direction, is then air-cooled to room temperature by forging stock.
Embodiment 4：Cu-24Ag alloys
Cu-24Ag alloys are prepared, are included the following steps：
(1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, according to mainly into Point：Fine copper ingot is 73wt%, and fine copper powder is 3wt%, and fine silver ingot is 24wt%, wherein the particle diameter of the fine copper powder It is 6 μm, and its oxide on surface is removed by reduction treatment.First, 1080 are heated to after fine copper ingot and fine silver ingot being mixed It DEG C is made to be fused into alloy melt, after keeping the temperature 10min, melt liquid level is protected using argon gas and melts fine copper powder addition alloy Body.3min is then sufficiently stirred alloy melt, while alloy melt temperature is reduced to 900 DEG C simultaneously using mechanical agitation mode And keep the temperature, make alloy melt rapid partially solidified and form semisolid line and staff control, then carry out castable.Above-mentioned half is solid The melt cast of state line and staff control is prepared into ingot casting in using the mold of circulating water, cold with the speed of 50-100 DEG C/min But to room temperature.
(2) multidirectional high temperature forging：Alloy cast ingot is heated to 720 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axis Forging and molding is carried out respectively to three orthogonal directions, and forging stock is then air-cooled to room by forging drafts 40% in each direction Temperature.
(3) cryogenic forging+combination aging：First, the forging stock of high temperature forging is heated to 500 DEG C, keeps the temperature 1h, along vertical Forging and molding is carried out respectively to, transverse direction and axial three orthogonal directions, and forging drafts 30% in each direction then will forging Base is air-cooled to room temperature.
Secondly, forging stock is heated to 400 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 30% in each direction, is then air-cooled to room temperature by forging stock.
Again, forging stock is heated to 300 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 20% in each direction, is then air-cooled to room temperature by forging stock.
Embodiment 5：Cu-30Ag alloys
Cu-30Ag alloys are prepared, are included the following steps：
(1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, according to mainly into Point：Fine copper ingot is 65wt%, and fine copper powder is 5wt%, and fine silver ingot is 30wt%, wherein the particle diameter of the fine copper powder It is 50 μm, and its oxide on surface is removed by reduction treatment.First, 1050 are heated to after fine copper ingot and fine silver ingot being mixed It DEG C is made to be fused into alloy melt, after keeping the temperature 10min, melt liquid level is protected using argon gas and melts fine copper powder addition alloy Body.5min is then sufficiently stirred alloy melt, while alloy melt temperature is reduced to 900 DEG C simultaneously using mechanical agitation mode And keep the temperature, make alloy melt rapid partially solidified and form semisolid line and staff control, then carry out castable.Above-mentioned half is solid The melt cast of state line and staff control is prepared into ingot casting in using the mold of circulating water, is cooled down with the speed of 100 DEG C/min To room temperature.
(2) multidirectional high temperature forging：Alloy cast ingot is heated to 710 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axis Forging and molding is carried out respectively to three orthogonal directions, and forging stock is then air-cooled to room by forging drafts 40% in each direction Temperature.
(3) cryogenic forging+combination aging：First, the forging stock of high temperature forging is heated to 500 DEG C, keeps the temperature 1h, along vertical Forging and molding is carried out respectively to, transverse direction and axial three orthogonal directions, and forging drafts 10% in each direction then will forging Base is air-cooled to room temperature.
Secondly, forging stock is heated to 400 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 30% in each direction, is then air-cooled to room temperature by forging stock.
Again, forging stock is heated to 300 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions carry out respectively Forging and molding, forging drafts 30% in each direction, is then air-cooled to room temperature by forging stock.
The corresponding mechanical properties of 1 Cu-Ag alloy embodiments 1-5 of table and electric conductivity

Claims (3)

  1. A kind of 1. preparation method of high-strength high-conductivity Cu-Ag alloys, which is characterized in that the high-strength high-conductivity Cu-Ag alloys are Cu-Ag bianry alloys, and main component is：Cu elements are 70-98wt%, and Ag elements are 2-30wt%；Specifically Processing step includes：
    (1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, according to main component： Fine copper ingot is 65-97wt%, and fine copper powder is 1-5wt%, and fine silver ingot is 2-30wt%, wherein the particle of the fine copper powder A diameter of 0.05-100 μm, and remove its oxide on surface by reduction treatment；First, after fine copper ingot and fine silver ingot being mixed 1050-1200 DEG C is heated to, it is made to be fused into alloy melt, after keeping the temperature 10min, melt liquid level is protected using argon gas and will be pure Copper powders add in alloy melt；1-5min is then sufficiently stirred alloy melt, while alloy is melted using mechanical agitation mode Temperature reduction is to 900-1100 DEG C and keeps the temperature 10min, makes alloy melt rapid partially solidified and forms semisolid mixing Tissue, then carries out castable, and the melt cast of above-mentioned semisolid line and staff control is made in using the mold of circulating water For into ingot casting, it is cooled to room temperature with the speed of 50-100 DEG C/min；
    (2) multidirectional high temperature forging：Alloy cast ingot is heated to 700-720 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axis Forging and molding is carried out respectively to three orthogonal directions, and forging stock is then air-cooled to by forging drafts 20-40% in each direction Room temperature；
    (3) cryogenic forging+combination aging includes step：
    The forging stock of high temperature forging is heated to 500 DEG C by 3.1, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are distinguished Forging and molding is carried out, forging stock is then air-cooled to room temperature by forging drafts 10-30% in each direction；
    Forging stock is heated to 400 DEG C by 3.2, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged into respectively Shape, forging drafts 10-30% in each direction, is then air-cooled to room temperature by forging stock；
    Forging stock is heated to 300 DEG C by 3.3, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged into respectively Shape, forging drafts 10-30% in each direction, is then air-cooled to room temperature by forging stock；The alloy yield strength of acquisition reaches 600-1100MPa, conductivity reach 75-100%IACS.
  2. 2. a kind of preparation method of high-strength high-conductivity Cu-Ag alloys, which is characterized in that prepare the tool of Cu-12Ag alloys Body step is as follows：
    (1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, into be grouped as including Fine copper ingot is 86wt%, fine copper powder is 2wt% and fine silver ingot is 12wt%；The particle diameter of the wherein described fine copper powder is 0.5 μm, and remove its oxide on surface by reduction treatment；First, 1100 are heated to after fine copper ingot and fine silver ingot being mixed It DEG C is made to be fused into alloy melt, after keeping the temperature 10min, melt liquid level is protected using argon gas and melts fine copper powder addition alloy Body；3min is then sufficiently stirred alloy melt, while alloy melt temperature is reduced to 880 DEG C simultaneously using mechanical agitation mode And heat preservation 10min, make alloy melt rapid partially solidified and form semisolid line and staff control, then carry out castable；On The melt cast for stating semisolid line and staff control is prepared into ingot casting in using the mold of circulating water, with the speed of 80 DEG C/min It is cooled to room temperature；
    (2) multidirectional high temperature forging：Alloy cast ingot is heated to 710 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axial three A orthogonal direction carries out forging and molding respectively, and forging stock is then air-cooled to room temperature by forging drafts 30% in each direction；
    (3) cryogenic forging+combination aging：First, the forging stock of high temperature forging is heated to 500 DEG C, keeps the temperature 1h, along longitudinal direction, horizontal stroke To and axial three orthogonal directions carry out forging and molding respectively, forging drafts 30% in each direction, then by forging stock sky It is cooled to room temperature；
    Secondly, forging stock is heated to 400 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged respectively Forging stock is then air-cooled to room temperature by forming, forging drafts 30% in each direction；
    Again, forging stock is heated to 300 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged respectively Forging stock is then air-cooled to room temperature by forming, forging drafts 30% in each direction；
    Yield strength 800MPa, tensile strength 970MPa, the high-strength and high-conductivity of conductivity 78%IACS are obtained by detection It can Cu-12Ag alloys.
  3. 3. a kind of preparation method of high-strength high-conductivity Cu-Ag alloys, which is characterized in that prepare the tool of Cu-24Ag alloys Body step is as follows：
    (1) solid-liquid double-phase solidification and semi-solid casting：Using fine copper ingot, fine silver ingot, fine copper powder as raw material, according to main component： Fine copper ingot is 73wt%, and fine copper powder is 3wt%, and fine silver ingot is 24wt%, wherein the particle diameter of the fine copper powder is 6 μm, and remove its oxide on surface by reduction treatment；First, being heated to 1080 DEG C after fine copper ingot and fine silver ingot being mixed makes It is fused into alloy melt, after keeping the temperature 10min, protects melt liquid level using argon gas and fine copper powder is added in alloy melt； 3min is then sufficiently stirred alloy melt using mechanical agitation mode, at the same by alloy melt temperature be reduced to 900 DEG C and 10min is kept the temperature, make alloy melt rapid partially solidified and forms semisolid line and staff control, then carries out castable；It is above-mentioned The melt cast of semisolid line and staff control is prepared into ingot casting in using the mold of circulating water, with the speed of 50-100 DEG C/min Degree is cooled to room temperature；
    (2) multidirectional high temperature forging：Alloy cast ingot is heated to 720 DEG C, keeps the temperature 1h, by ingot casting along longitudinally, laterally and axial three A orthogonal direction carries out forging and molding respectively, and forging stock is then air-cooled to room temperature by forging drafts 40% in each direction；
    (3) cryogenic forging+combination aging：First, the forging stock of high temperature forging is heated to 500 DEG C, keeps the temperature 1h, along longitudinal direction, horizontal stroke To and axial three orthogonal directions carry out forging and molding respectively, forging drafts 30% in each direction, then by forging stock sky It is cooled to room temperature；
    Secondly, forging stock is heated to 400 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged respectively Forging stock is then air-cooled to room temperature by forming, forging drafts 30% in each direction；
    Again, forging stock is heated to 300 DEG C, keeps the temperature 1h, along longitudinally, laterally and axially three orthogonal directions are forged respectively Forging stock is then air-cooled to room temperature by forming, forging drafts 20% in each direction；
    Yield strength 890MPa, tensile strength 1102MPa, the high-strength and high-conductivity of conductivity 78%IACS are obtained by detection It can Cu-24Ag alloys.
CN201611240121.9A 2016-12-28 2016-12-28 A kind of preparation method of high-strength high-conductivity Cu-Ag alloys Active CN106676314B (en)

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