CN110951988A - Copper-based zirconium and zirconium oxide composite reinforced alloy and manufacturing method thereof - Google Patents
Copper-based zirconium and zirconium oxide composite reinforced alloy and manufacturing method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
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- C22C1/00—Making non-ferrous alloys
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- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The invention discloses a copper-based zirconium and zirconium oxide composite reinforced alloy and a manufacturing method thereof, wherein the method comprises the following steps of mixing alloy powder and oxidant powder, isostatic pressing ingot making, water seal hot extrusion, functional gradient heat treatment, cold plastic processing, replacing the traditional alumina trioxide particles mainly comprising loose gamma phase with hard α -phase nano-scale dispersed zirconium oxide particles in a wider heat treatment temperature range generated by internal oxidation, simultaneously, zirconium precipitation strengthening forms a composite strengthening effect, the strength is improved, internal oxidation treatment is carried out after the hot processing, the plasticity of the material is improved, and the surplus of zirconium enables the content of mixed oxygen to reach an oxygen-free copper level.
Description
Technical Field
The invention relates to the field of metal material processing technology, in particular to a copper-based zirconium and zirconium oxide composite reinforced alloy and a manufacturing method thereof.
Background
The dispersion strengthened copper composite material has the advantages of high thermal conductivity, high electric conductivity, excellent high-temperature strength, high-temperature creep resistance, good wear resistance and the like, and has great application potential in the fields of electromechanics, electronics, space navigation, atomic energy and the like.
The dispersion strengthened copper alloy is also called as aluminum oxide copper, and is a copper alloy which is dispersion strengthened by nanometer aluminum oxide particles, the aluminum oxide dispersion strengthened copper composite material is a dispersion strengthened copper product which is most widely applied, the physical properties of the aluminum oxide dispersion strengthened copper material are very similar to those of pure copper, and the aluminum oxide dispersion strengthened copper material has high strength, high electrical conductivity and high thermal conductivity; the strength and the conductivity of the copper can still be kept well after the copper is exposed to the temperature (800-900 ℃) which is close to the melting point of the copper matrix for a long time. The internal oxidation method is the most common means for preparing the material and is also the hotspot of the research on the aluminum oxide dispersion strengthened copper at present. Patent No. CN201310151407.x, patent No. CN201510551047.1, etc. all focus on improving internal oxidation and subsequent blank making processes to obtain uniform, dispersed and fine alumina particles with low residual oxygen content, but all are difficult to solve the following problems fundamentally:
(1) the residual oxygen in the alloy is difficult to remove
Under the high temperature condition (900 ℃ -1000 ℃), the aluminum powder can generate aluminum oxide completely only by introducing excessive oxygen, the excessive oxygen and copper powder can generate copper oxide or cuprous oxide, the oxygen in the copper powder is difficult to completely remove by reducing with hydrogen or other reducing agents, and meanwhile, the process flow for preparing the ingot blank is increased;
(2) the process window for generating dispersed, fine and uniform alumina is narrow, different oxidation processes can generate different types of alumina particles, α type alumina particles can play a role in strengthening dispersed particles, while gamma type alumina particles are loose and cannot be used as strengthened particles, and once the process control precision is reduced, the gamma type alumina particles are generated, the material cannot be used;
(3) the aluminum oxide dispersion strengthened copper needs plastic processing after internal oxidation in the process flow, and the process flow can bring the problem of low plasticity.
Disclosure of Invention
The invention aims to solve the defects of the prior art, the invention provides a copper-based zirconium and zirconium oxide composite reinforced alloy and a manufacturing method thereof, wherein nano-scale dispersed zirconium oxide particles generated by internal oxidation are used for replacing the traditional dispersed alumina sesquioxide particles, the nano-scale dispersed zirconium oxide particles can stably exist in a wider heat treatment temperature range as hard α phase, the defect that gamma-type aluminum oxide particles in the temperature range are loose and cannot be used as reinforced particles is avoided, the excessive zirconium in the alloy is used for forming a ZrxCuy intermetallic compound reinforced phase through solid solution and precipitation aging step heat treatment in a copper base to further generate a reinforcing effect, the excessive zirconium element is configured to enable free miscellaneous oxygen in a metal matrix to be consumed completely, the miscellaneous oxygen content of the material reaches an oxygen-free copper level which is less than or equal to 5ppm, the plasticity and miscellaneous oxygen content of dispersion reinforced copper are controlled, the functional gradient heat treatment containing the internal oxidation purpose is that after a hot extrusion process, the original metal powder does not generate a ceramic oxide film in advance so as to facilitate extrusion deformation and welding, the stable realization of the alloy which is close to the plasticity of the zirconium alloy, the elongation of the copper alloy meets the requirements of high-power electromagnetic trolley wire forming and the high-elongation of an electromagnetic trolley wire.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a copper-based zirconium and zirconia composite reinforced alloy and a manufacturing method thereof, wherein the method comprises the following steps: mixing alloy powder and oxidant powder, isostatic pressing ingot making, water sealing hot extrusion, functional gradient heat treatment and cold plastic processing.
As a further preference of the invention, the method comprises the following specific steps:
step one, mixing alloy powder and oxidant powder
Preparing copper-zirconium alloy powder, wherein the mass percent of zirconium is 0.35-0.5%, and the balance is copper, then screening the copper-zirconium alloy powder by a particle screening machine, and mixing the copper-zirconium alloy powder and cuprous oxide powder according to the mixing ratio: 90-99: 10-1;
step two, isostatic pressing ingot making
Putting the copper-zirconium alloy powder and cuprous oxide powder into an isostatic pressing furnace to obtain a primary cylindrical ingot blank;
step three, water seal hot extrusion
Extruding the primary ingot blank from a hot extruder, and applying sufficient water cooling to the outlet end of an extrusion die to retain a high-temperature zirconium solid solution phase;
step four, functionally gradient heat treatment
Carrying out low-temperature precipitation heat treatment, medium-temperature oxidation diffusion heat treatment, high-temperature solid solution heat treatment and low-temperature precipitation heat treatment in sequence;
step five, cold plastic working
The alloy with the final dimension specification is obtained through plastic pressure processing such as rolling, drawing, rotary swaging and the like, and the zirconia particle can prevent deformation dislocation slippage from reaching the highest strength performance and high-temperature strength basic value.
In a further preferred embodiment of the present invention, the particle size of the copper-zirconium alloy powder in the first step is-80 mesh to +1000 mesh.
In a further preferred embodiment of the present invention, the cuprous oxide in the first step has a particle size of-200 to 1000 mesh.
As a further preferred aspect of the present invention, in the second step, the isostatic pressure is in the range of 185MPa to 320 MPa; the size range of the cylindrical ingot blank is 150 mm-450 mm in diameter and 200 mm-550 mm in length.
As a further preference of the present invention, in the third step, the extrusion temperature in the hot extruder is in the range of 850 ℃ to 960 DEG C
In a further preferred embodiment of the present invention, in the third step, the extruded product in the hot extruder is in the form of a tube, a rod, a wire, or a row.
More preferably, in the fourth step, the temperature of the low-temperature precipitation heat treatment is 420 to 550 ℃ for 1 to 5 hours, the temperature of the medium-temperature oxidation diffusion heat treatment is 750 to 850 ℃ for 1 to 5 hours, the temperature of the high-temperature solution heat treatment is 890 to 950 ℃ for 0.5 to 2 hours, and the temperature of the low-temperature precipitation heat treatment is 420 to 550 ℃ for 1 to 5 hours.
As a further preferable mode of the present invention, in the fourth step, during the low-temperature precipitation heat treatment, the medium-temperature oxidation diffusion heat treatment, the high-temperature solid solution heat treatment and the low-temperature precipitation heat treatment, the temperatures of the four treatments sequentially rise, the four temperatures are sequentially and continuously performed, and each stage generates a heat treatment combination with different effects on the basis of the previous stage or at a specific temperature, and is a key link for realizing a dual strengthening mechanism of the dispersion strengthening of zirconia and the precipitation strengthening of the copper-zirconium alloy.
The low-temperature precipitation heat treatment has the functions of overaging the precipitation heat treatment to precipitate the zirconium element dissolved in the copper matrix in the form of intermetallic compounds and the concentration of the micro-domains generated in the scale range of 20nm to 70nm by the overaging treatment is enriched beyond the critical concentration for the oxidation reaction of zirconium, so as to prepare for the next step of the solid-phase diffusion internal oxidation of zirconium.
The function of the medium-temperature oxidation diffusion heat treatment is that the temperature reaches the decomposition temperature of cuprous oxide, the cuprous oxide is decomposed into elemental copper and oxygen elements, an oxygen source is provided for the oxidation of partial zirconium elements, and the nanoscale zirconia dispersion strengthening phase is generated through sufficient solid phase diffusion. Meanwhile, because the surplus zirconium element which is prepared in proportion is reserved, the residual oxygen element which does not participate in the reaction is almost zero, and the purpose that the content of the mixed oxygen is controlled at the level of oxygen-free copper is achieved.
The high-temperature solution heat treatment has the function that the residual zirconium element which is not oxidized is re-dissolved by the solid solution copper base, so that preparation is made for the next precipitation heat treatment strengthening of the material.
The low-temperature precipitation heat treatment has the function of performing aging precipitation strengthening heat treatment after the surplus zirconium element is re-dissolved in the copper base, and realizes the double strengthening mechanism basis of zirconium oxide dispersion strengthening and precipitation strengthening. During the subsequent cold working deformation, the strengthening effect increases as the plastic deformation will further produce work hardening.
As a further preferred aspect of the present invention, in the fifth step, the tensile strength σ of the alloy after plastic workingbThe softening temperature is more than or equal to 720MPa and more than or equal to 920 ℃, the softening temperature retains not less than 85% of basic strength value, and the relative conductivity IACS is more than or equal to 80%.
Has the advantages that: compared with the prior art, the copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof have the following advantages:
(1) the problem of low plasticity caused by plastic processing after internal oxidation in the process flow of the aluminum oxide dispersion strengthened copper is solved, and when the copper alloy is in a hard state, the elongation (delta, 5D) of the aluminum oxide dispersion strengthened copper alloy is 11-24 percent, and the elongation (delta, 5D) of the copper alloy is 23-44 percent;
(2) the control of the content of the miscellaneous oxygen can be stabilized in the control range of the oxygen content of the oxygen-free copper, and [ O ] is less than or equal to 10 ppm;
(3) the dual strengthening mechanism of zirconia dispersion strengthening and precipitation strengthening realizes higher normal temperature strength and high temperature strength, and is a foundation. In the subsequent cold-working deformation process, the strengthening effect is improved along with the further work hardening generated by plastic deformation, and on the premise of the same relative conductivity of 80% IACS, the Rockwell hardness HRB75-85 of the aluminum oxide dispersion strengthened copper alloy and the Rockwell hardness HRB80-92 of the alloy are achieved;
(4) on the premise of the same hardness, the material adopts a double strengthening mechanism, so that the weight ratio of dispersion strengthened oxides in the alloy can be reduced, the conductivity is improved, trace surplus zirconium element (less than or equal to 0.05%) can generate a precipitation strengthening effect with a copper base, but the effect of the precipitation strengthening effect on the conductivity can be ignored, and the conductivity of the alloy is about 10% higher than that of an aluminum oxide dispersion strengthened copper alloy. For example, when the hardness is HRB80, the conductivity of the alloy is 87% IACS-90% IACS, and the relative conductivity of the aluminum oxide dispersion strengthened copper alloy is 75% IACS-82% IACS.
Detailed Description
The invention will be further elucidated with reference to the following specific examples.
The invention relates to a copper-based zirconium and zirconium oxide composite reinforced alloy and a manufacturing method thereof, wherein the method comprises the following steps: mixing alloy powder and oxidant powder, isostatic pressing ingot making, water sealing hot extrusion, functional gradient heat treatment and cold plastic processing.
Example 1
Step one, mixing alloy powder and oxidant powder
Preparing copper-zirconium alloy powder, wherein the mass percent of zirconium is 0.35%, the balance is copper, the granularity is-80 meshes, mixing the copper alloy powder with cuprous oxide powder, the granularity of the cuprous oxide powder is-200 meshes, the cuprous oxide is decomposed into simple substance copper and oxygen under the temperature condition of the second stage of the step heat treatment in the following step, and an oxygen source is provided for the oxidation of partial zirconium elements, and the mixing proportion is as follows: and 90:10, aiming at realizing that the part with the mass percent of 0.3 percent of zirconium in the copper-zirconium alloy powder is internally oxidized into dispersed zirconium oxide ZrO hard particles, and the rest part with the mass percent of 0.05 percent of zirconium in the copper-zirconium alloy powder is stored in a solid solution or precipitation mode in the next step. Putting the mixed powder into a V-shaped vacuum mixer, mixing for 90min, wherein the vacuum degree is minus 0.1 Mpa;
step two, isostatic pressing ingot making
Placing the mixed copper-zirconium alloy powder and cuprous oxide powder into an isostatic pressing furnace to obtain a primary cylindrical ingot blank, wherein the isostatic pressing pressure in the isostatic pressing furnace is 185MPa, the size range of the cylindrical ingot blank is 150mm in diameter and 200mm in length;
step three, water seal hot extrusion
The isostatic pressing ingot blank is extruded into a wire rod in a 3200-ton horizontal hydraulic hot extrusion machine, the ingot blank is firstly heated to 920 ℃ through an induction heating furnace matched with the equipment, the inner diameter of an extrusion cylinder is 295mm, the ingot blank is preheated to 300 ℃, the type of the extrusion die adopts a flat die, the thickness of an extrusion peeling unilateral is 2mm, the diameter of a die hole is 32mm, the speed of the extrusion cylinder is 25mm/s, the actual diameter of the extruded wire rod is 31.95mm, sufficient water cooling is applied to the outlet end of the extrusion die, the solid solution phase of high-temperature zirconium in copper-based alloy is reserved through rapid cooling, the temperature of circulating cooling water is 26 ℃, and the water. The inner diameter of a take-up reel of the take-up machine is 1200mm, and the weight of an extruded wire blank coil is 225 Kg;
step four, functionally gradient heat treatment, wherein the treatment is carried out in a 150KW well type vacuum heat treatment furnace, the vacuum degree is negative 0.1MPa, and the steps sequentially comprise:
1. low temperature (500 deg.c for 3 hr) overaging precipitation heat treatment;
2. medium temperature (800 ℃ for 1.5 hours) oxidation diffusion heat treatment;
3. high-temperature (900 ℃ for 1 hour) solution heat treatment;
4. low-temperature (480 ℃ for 2 hours) aging precipitation heat treatment;
the surface oxidation is avoided after the furnace is taken out, and the next procedure can be directly carried out without acid washing;
step five, stretching the alloy wire subjected to the functional gradient heat treatment on a 15T combined drawing machine to the outer diameter specification of 22mm, and then stretching on a 1500mm coil diameter 7T inverted coil drawing machine to the diameter of 15.8mm to reach the finished product size, wherein the total cold working rate is 71.5%, and the coil weight of the wire reaches 210 Kg;
the material for cold heading of the high-performance electrode cap part for the automatic welding robot of the automobile is suitable for the anti-adhesion and long-life resistance welding of the galvanized steel plate and the aluminum automobile body of the automobile;
the finished product obtained by the mixture ratio has the main physical and mechanical performance indexes: elongation (delta, 5D) of 26%, Rockwell hardness HRB89, relative conductivity of 84% IACS, softening temperature point (maximum temperature point retaining not less than 85% of normal temperature hardness) of 945 ℃, and content of impure oxygen of 8.5 ppm.
Comparative experiment
Example 2
Step one, copper-zirconium alloy powder, wherein the mass percent of zirconium is 0.5 percent, the balance is copper, the granularity is-100 meshes, and the copper-zirconium alloy powder is mixed with cuprous oxide powder (the granularity is-500 meshes) according to the mixing proportion: 99.66:0.34,. The mixed powder is put into a V-shaped vacuum mixer, the mixing time is 90 minutes, and the vacuum degree is minus 0.1 MPa;
and step two, placing the mixed powder in a wet belt type vertical isostatic pressing machine, and keeping the pressure at the peak value of the isostatic pressing pressure of 300MPa for 30 seconds. The obtained primary cylindrical ingot blank is trimmed by a lathe and then is provided with a cylindrical middle through hole, and the size of the ingot blank is
Step three, water seal hot extrusion
Extruding the isostatic pressing ingot blank into a wire rod in a 3200-ton horizontal double-acting hydraulic hot extrusion machineThe billet is heated to 950 ℃ by an induction heating furnace matched with the equipment, the inner diameter of an extrusion cylinder is 295mm, and the diameter of a perforating needle
The extrusion die type adopts a conical die (die angle is 24 degrees), the thickness of an extrusion peeled single side is 2mm, and the diameter of a die hole of the extrusion die
The extrusion cylinder speed was: 30 mm/sec, actual size of extruded pipe
An immersed type cooling water tank which flows reversely is arranged at the outlet of the extrusion die, so that the oxidation of the inner surface and the outer surface of the pipe is avoided;
step four, passing the pipe 15T combined drawing machine
Through multi-pass stretching
Coiling the mixture into a coil through a coiling mechanism of a combined drawing machine, and preparing for entering a vacuum heat treatment furnace in the next step;
and step four, performing functional gradient heat treatment, namely treating in a 300KW horizontal vacuum quenching heat treatment furnace with the vacuum degree of minus 0.1 MPa.
The sequence comprises the following steps:
1. low-temperature (520 ℃ for 2 hours) overaging precipitation heat treatment;
2. medium temperature (800 ℃ for 1.5 hours) oxidation diffusion heat treatment;
3. high-temperature (920 ℃ for 1 hour) solution heat treatment;
4. low-temperature (480 ℃ for 2 hours) aging precipitation heat treatment;
the surface oxidation is avoided after the furnace is taken out, and the next procedure can be directly carried out without acid washing;
step four, stretching the alloy pipe subjected to the functional gradient heat treatment to the diameter through a 15T combined drawing machine and a 2700mm coil diameter inverted coil drawing machine
A coil pipe;
the high-performance contact nozzle is used for manufacturing an automatic gas shielded welding robot;
the main physical and mechanical performance indexes are as follows: elongation (delta, 5D) 23%, Rockwell hardness HRB 92, relative conductivity 80% IACS, softening temperature point (maximum temperature point retaining not less than 85% of normal temperature hardness) 970 ℃, and content of miscellaneous oxygen 9 ppm.
Claims (10)
1. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof are characterized in that the method comprises the following steps: mixing alloy powder and oxidant powder, isostatic pressing ingot making, water sealing hot extrusion, functional gradient heat treatment and cold plastic processing.
2. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 1, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: the method comprises the following specific steps:
step one, mixing alloy powder and oxidant powder
Preparing copper-zirconium alloy powder, wherein the mass percent of zirconium is 0.35-0.5%, and the balance is copper, then screening the copper-zirconium alloy powder by a particle screening machine, and mixing the copper-zirconium alloy powder and cuprous oxide powder according to the mixing ratio: 90-99: 10-1;
step two, isostatic pressing ingot making
Putting the copper-zirconium alloy powder and cuprous oxide powder into an isostatic pressing furnace to obtain a primary cylindrical ingot blank;
step three, water seal hot extrusion
Extruding the primary ingot blank from a hot extruder, and cooling the outlet end of an extrusion die by water;
step four, functionally gradient heat treatment
Carrying out low-temperature precipitation heat treatment, medium-temperature oxidation diffusion heat treatment, high-temperature solid solution heat treatment and low-temperature precipitation heat treatment in sequence;
step five, cold plastic working
The alloy with the final dimension specification is obtained through plastic pressure processing such as rolling, drawing, rotary swaging and the like, and the zirconia particle can prevent deformation dislocation slippage from reaching the highest strength performance and high-temperature strength basic value.
3. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 2, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: the granularity of the copper-zirconium alloy powder in the first step is-80 meshes to 1000 meshes.
4. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 2, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: in the first step, the particle size of the cuprous oxide is-200 meshes to 1000 meshes.
5. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 2, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: in the second step, the isostatic pressure intensity range is 185 MPa-320 MPa; the size range of the cylindrical ingot blank is 150 mm-450 mm in diameter and 200 mm-550 mm in length.
6. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 2, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: in step three, the extrusion temperature in the hot extruder is in the range of 850 ℃ to 960 ℃.
7. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 2, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: in the third step, the shape of the extruded product in the hot extruder is tube, rod, line or row.
8. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 2, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: in the fourth step, the temperature of the low-temperature precipitation heat treatment is 420-550 ℃, the time is 1-5 h, the temperature of the medium-temperature oxidation diffusion heat treatment is 750-850 ℃, the time is 1-5 h, the temperature of the high-temperature solution heat treatment is 890-950 ℃, the time is 0.5-2 h, the temperature of the low-temperature precipitation heat treatment is 420-550 ℃, and the time is 1-5 h.
9. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 8, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: in the fourth step, the temperature of the four treatments is increased in sequence during the low-temperature precipitation heat treatment, the medium-temperature oxidation diffusion heat treatment, the high-temperature solid solution heat treatment and the low-temperature precipitation heat treatment.
10. The copper-based zirconium and zirconium oxide composite reinforced alloy and the manufacturing method thereof according to claim 2, wherein the copper-based zirconium and zirconium oxide composite reinforced alloy is characterized in that: in the fifth step, the tensile strength sigma of the alloy after plastic workingbNot less than 720MPa, softening temperature not less than 920 ℃, and relative conductivity IACS not less than 80%.
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