CN113234955A - Silver-copper alloy material for manufacturing commutator copper sheet - Google Patents
Silver-copper alloy material for manufacturing commutator copper sheet Download PDFInfo
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/114—Making porous workpieces or articles the porous products being formed by impregnation
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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Abstract
The invention provides a silver-copper alloy material for manufacturing commutator copper sheets, which comprises the following components, by mass, 0.05-0.15wt% of Ag, 0.02-0.05wt% of Al, 0.02-0.05wt% of Zn, 0.01-0.1wt% of nano acetylene black, and the balance of Cu and inevitable impurities, wherein the impurity content is less than 0.002 wt%.
Description
Technical Field
The invention relates to the technical field of commutators, in particular to a silver-copper alloy material for manufacturing a commutator copper sheet.
Background
The commutator is a key component of the direct current motor and is used for converting alternating current electromotive force and current in an armature winding into direct current electromotive force and current between brushes. The commutator segment is usually made of silver-copper alloy with high hardness and good electric conduction and wear resistance. The copper-silver alloy is prepared by adding a small amount of silver element into a copper matrix, the electric conductivity and the thermal conductivity of the copper alloy are reduced slightly, the influence on plasticity is small, and the recrystallization temperature and the creep strength of copper can be obviously improved. Because silver belongs to a solid solution strengthening type additive element, silver is easy to be added into copper, and the required product performance can be obtained by hot working or cold working, so that the copper-silver alloy is a copper material for a commutator which is widely obtained.
The manufacturing methods of the silver and copper alloy particles comprise a liquid phase reduction method, an atomization method and even direct cladding heat treatment, most of the manufacturing methods can only form a mechanical core-shell structure or contain a large amount of eutectic, the auxiliary promotion effect of the two cannot be fully exerted, the oxygen content and the harmful gas content of the alloy are still high, the crystals are not compact enough, the conductivity of the copper alloy material is greatly influenced, and the application market of the copper for electrical engineering is severely limited.
Disclosure of Invention
Aiming at the existing problems, the invention provides a silver-copper alloy material for manufacturing a commutator copper sheet, which reasonably prefabricates porous aluminum bronze and porous brass containing nano acetylene black, provides a good refining promoting effect for alloy phase structure change in the silver-copper alloy preparation process, has uniform and compact tissue dispersion, effectively improves the conductivity and the wear resistance, obviously improves the degassing effect in the smelting process of the prefabricated porous structure, obviously reduces solid solution waste, reduces the oxygen content, obviously improves the comprehensive quality, and is efficient and practical.
In order to achieve the above object, the present invention adopts the following technical solutions:
the silver-copper alloy material for manufacturing the commutator copper sheet comprises, by mass, 0.05-0.15wt% of Ag, 0.02-0.05wt% of Al, 0.02-0.05wt% of Zn, 0.01-0.1wt% of nano acetylene black, and the balance of Cu and inevitable impurities, wherein the content of the impurities is less than 0.002 wt%.
As a further optimization of the invention, the alloy also comprises 0-0.08wt% of RE, wherein the RE is selected from lanthanum and cerium composition, and the mass ratio of the RE to the lanthanum to the cerium is 2: 1.
As a further optimization of the invention, the Ag raw material is selected from electrolytic silver with the purity of more than 99.9 percent, the Al raw material is selected from aluminum bronze, the Zn raw material is selected from brass, and the Cu raw material is selected from electrolytic copper with the purity of more than 99.9 percent, aluminum bronze and brass.
As further optimization of the invention, the silver-copper alloy material for manufacturing the commutator copper sheet is prepared by the following steps,
1) prefabricating porous aluminum bronze and porous brass containing nano acetylene black, and dividing RE into two parts for later use;
2) putting electrolytic copper into a melting furnace for heating and melting, then adding electrolytic silver into the melting furnace, stirring and melting, then sequentially adding the porous aluminum bronze, one part of RE, the porous brass and the rest of RE in the step 1), covering carbon slag on the surface layer, melting, finally taking out a bag, preparing a copper sheet crude product by adopting upward continuous casting and calendering, and obtaining the commutator copper sheet by rolling and annealing treatment.
As a further optimization of the invention, the prefabrication method of the porous aluminum bronze and the porous brass containing the nanometer acetylene black in the step 1) comprises the following steps,
s1, taking the aluminum bronze and the brass, and performing ball milling treatment respectively to obtain aluminum bronze powder and brass powder;
s2, preparing a mixed solution of a 10% polyvinyl alcohol solution and a borax water solution, and then respectively adding the mixed solution into the aluminum bronze powder and the brass powder to obtain two mixed materials;
and S3, adding the nano acetylene black into the two mixtures respectively in two parts, uniformly mixing, preparing an alloy blank by adopting an organic foam impregnation method, and sintering at high temperature in a nitrogen atmosphere to obtain the porous aluminum bronze and the porous brass containing the nano acetylene black.
As a further optimization of the invention, in the step S1, the ball milling treatment is carried out by taking 70-80vt% ethanol water solution as grinding liquid, and the particle size after ball milling is required to be less than 1 mm.
As a further optimization of the invention, the volume ratio of the 10% polyvinyl alcohol solution to the borax water solution in the mixed solution in the step S2 is 10:0.4-0.8, and the adding ratio of the mixed solution to the aluminum bronze powder and the brass powder is 5: 1.
As a further optimization of the present invention, the high-temperature sintering temperature in step S3 is 1200-1400 ℃.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the invention, the porous aluminum bronze and the porous brass containing the nano acetylene black are reasonably prefabricated, so that a good refining promoting effect is provided for alloy phase structure change in the silver-copper alloy preparation process, the tissue dispersion is uniform and compact, the conductivity and the wear resistance are effectively improved, the degassing effect is obviously improved in the smelting process of the prefabricated porous structure, the solid solution waste is obviously reduced, the oxygen content is reduced, the comprehensive quality is obviously improved, and the method is efficient and practical.
In addition, in the preparation process, the borax has a certain buffering effect, and is matched with polyvinyl alcohol to improve the combination rheology between the metal alloy powder and the nanometer acetylene carbon black, the dispersibility is strong, and in addition, the borax can be further combined in a porous structure in the high-temperature sintering process to improve the integral wear resistance.
Furthermore, the porous aluminum bronze and the porous brass containing the nano acetylene black (containing a small amount of boron) are alternately added with the inoculation deoxidizing component (rare earth) in the smelting preparation process, so that the rheological mixing degree of the melt is effectively improved, in addition, the porous structure is also favorable for improving the degassing effect in the smelting process, the porous alloys with different melting points and different porosities are reasonably and orderly added in the smelting process, the refining degree of the melt is obviously improved, and the performance of the finished product is stably improved.
The silver-copper alloy prepared by the method has the advantages that the conductivity can reach more than 99IACS (International Annealed copper Standard), the oxygen content is less than 5ppm, the hardness is more than 130HB, the comprehensive benefit is remarkably improved, and the silver-copper alloy is popularized and applied.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Example 1:
the silver-copper alloy material for manufacturing the commutator copper sheet comprises, by mass, 0.08wt% of Ag, 0.02wt% of Al, 0.03wt% of Zn, 0.05wt% of nano acetylene black, and the balance of Cu and inevitable impurities, wherein the impurity content is less than 0.002 wt%.
Furthermore, the alloy also comprises 0.03wt% of RE, wherein the RE is selected from lanthanum and cerium compositions, and the mass ratio of the RE to the lanthanum to cerium compositions is 2: 1.
Wherein the Ag raw material is selected from electrolytic silver with the purity of more than 99.9 percent, the Al raw material is selected from aluminum bronze, the Zn raw material is selected from brass, and the Cu raw material is selected from electrolytic copper with the purity of more than 99.9 percent, aluminum bronze and brass.
Based on the raw material proportion and selection, the silver-copper alloy material for manufacturing the commutator copper sheet is prepared by the following steps,
1) prefabricating porous aluminum bronze and porous brass containing nano acetylene black, and dividing RE into two parts for later use;
2) putting electrolytic copper into a melting furnace for heating and melting, then adding electrolytic silver into the melting furnace, stirring and melting, then sequentially adding the porous aluminum bronze, one part of RE, the porous brass and the rest of RE in the step 1), covering carbon slag on the surface layer, melting, finally taking out a bag, preparing a copper sheet crude product by adopting upward continuous casting and calendering, and obtaining the commutator copper sheet by rolling and annealing treatment.
Furthermore, the prefabrication method of the porous aluminum bronze and the porous brass containing the nanometer acetylene black in the step 1) comprises the following steps,
s1, taking the aluminum bronze and the brass, and performing ball milling treatment respectively to obtain aluminum bronze powder and brass powder;
s2, preparing a mixed solution of a 10% polyvinyl alcohol solution and a borax water solution, and then respectively adding the mixed solution into the aluminum bronze powder and the brass powder to obtain two mixed materials;
and S3, adding the nano acetylene black into the two mixtures respectively in two parts, uniformly mixing, preparing an alloy blank by adopting an organic foam impregnation method, and sintering at high temperature in a nitrogen atmosphere to obtain the porous aluminum bronze and the porous brass containing the nano acetylene black.
In the step S1, the ball milling treatment is performed by using 80vt% ethanol aqueous solution as a grinding fluid, and the particle size after ball milling is required to be less than 1 mm.
And step S2, the volume ratio of the 10% polyvinyl alcohol solution to the borax water solution in the mixed solution is 10:0.5, and the adding ratio of the mixed solution to the aluminum bronze powder and the brass powder is 5: 1.
The high-temperature sintering temperature in step S3 was 1300 ℃.
The conductivity of the finished silver-copper alloy product prepared by the embodiment can reach 98.89IACS through detection, the oxygen content is less than 8ppm, and the hardness is more than 127 HB.
Example 2:
the silver-copper alloy material for manufacturing the commutator copper sheet comprises, by mass, 0.08wt% of Ag, 0.05wt% of Al, 0.05wt% of Zn, 0.1wt% of nano acetylene black, and the balance of Cu and inevitable impurities, wherein the content of the impurities is less than 0.002 wt%.
Furthermore, the alloy also comprises 0.04wt% of RE, wherein the RE is selected from lanthanum and cerium composition, and the mass ratio of the RE to the lanthanum to cerium composition is 2: 1.
Wherein the Ag raw material is selected from electrolytic silver with the purity of more than 99.9 percent, the Al raw material is selected from aluminum bronze, the Zn raw material is selected from brass, and the Cu raw material is selected from electrolytic copper with the purity of more than 99.9 percent, aluminum bronze and brass.
Based on the raw material proportion and selection, the silver-copper alloy material for manufacturing the commutator copper sheet is prepared by the following steps,
1) prefabricating porous aluminum bronze and porous brass containing nano acetylene black, and dividing RE into two parts for later use;
2) putting electrolytic copper into a melting furnace for heating and melting, then adding electrolytic silver into the melting furnace, stirring and melting, then sequentially adding the porous aluminum bronze, one part of RE, the porous brass and the rest of RE in the step 1), covering carbon slag on the surface layer, melting, finally taking out a bag, preparing a copper sheet crude product by adopting upward continuous casting and calendering, and obtaining the commutator copper sheet by rolling and annealing treatment.
Furthermore, the prefabrication method of the porous aluminum bronze and the porous brass containing the nanometer acetylene black in the step 1) comprises the following steps,
s1, taking the aluminum bronze and the brass, and performing ball milling treatment respectively to obtain aluminum bronze powder and brass powder;
s2, preparing a mixed solution of a 10% polyvinyl alcohol solution and a borax water solution, and then respectively adding the mixed solution into the aluminum bronze powder and the brass powder to obtain two mixed materials;
and S3, adding the nano acetylene black into the two mixtures respectively in two parts, uniformly mixing, preparing an alloy blank by adopting an organic foam impregnation method, and sintering at high temperature in a nitrogen atmosphere to obtain the porous aluminum bronze and the porous brass containing the nano acetylene black.
In the step S1, the ball milling treatment is performed by using 80vt% ethanol aqueous solution as a grinding fluid, and the particle size after ball milling is required to be less than 1 mm.
And step S2, the volume ratio of the 10% polyvinyl alcohol solution to the borax water solution in the mixed solution is 10:0.8, and the adding ratio of the mixed solution to the aluminum bronze powder and the brass powder is 5: 1.
The high-temperature sintering temperature in step S3 was 1200 ℃.
The preparation method of the silver-copper alloy of the embodiment is the same as that of the embodiment 1, and the prepared finished silver-copper alloy product has the conductivity of 98.36IACS, the oxygen content of less than 5ppm and the hardness of more than 131HB through detection.
Example 3:
the silver-copper alloy material for manufacturing the commutator copper sheet comprises, by mass, 0.012wt% of Ag, 0.03wt% of Al, 0.03wt% of Zn, 0.06wt% of nano acetylene black, and the balance of Cu and inevitable impurities, wherein the content of the impurities is less than 0.002 wt%.
Furthermore, the alloy also comprises 0.05wt% of RE, wherein the RE is selected from lanthanum and cerium compositions, and the mass ratio of the RE to the lanthanum to cerium compositions is 2: 1.
Wherein the Ag raw material is selected from electrolytic silver with the purity of more than 99.9 percent, the Al raw material is selected from aluminum bronze, the Zn raw material is selected from brass, and the Cu raw material is selected from electrolytic copper with the purity of more than 99.9 percent, aluminum bronze and brass.
Based on the raw material proportion and selection, the silver-copper alloy material for manufacturing the commutator copper sheet is prepared by the following steps,
1) prefabricating porous aluminum bronze and porous brass containing nano acetylene black, and dividing RE into two parts for later use;
2) putting electrolytic copper into a melting furnace for heating and melting, then adding electrolytic silver into the melting furnace, stirring and melting, then sequentially adding the porous aluminum bronze, one part of RE, the porous brass and the rest of RE in the step 1), covering carbon slag on the surface layer, melting, finally taking out a bag, preparing a copper sheet crude product by adopting upward continuous casting and calendering, and obtaining the commutator copper sheet by rolling and annealing treatment.
Furthermore, the prefabrication method of the porous aluminum bronze and the porous brass containing the nanometer acetylene black in the step 1) comprises the following steps,
s1, taking the aluminum bronze and the brass, and performing ball milling treatment respectively to obtain aluminum bronze powder and brass powder;
s2, preparing a mixed solution of a 10% polyvinyl alcohol solution and a borax water solution, and then respectively adding the mixed solution into the aluminum bronze powder and the brass powder to obtain two mixed materials;
and S3, adding the nano acetylene black into the two mixtures respectively in two parts, uniformly mixing, preparing an alloy blank by adopting an organic foam impregnation method, and sintering at high temperature in a nitrogen atmosphere to obtain the porous aluminum bronze and the porous brass containing the nano acetylene black.
In the step S1, the ball milling treatment is performed by using 80vt% ethanol aqueous solution as a grinding fluid, and the particle size after ball milling is required to be less than 1 mm.
And step S2, the volume ratio of the 10 percent polyvinyl alcohol solution to the borax water solution in the mixed solution is 10:0.4, and the adding ratio of the mixed solution to the aluminum bronze powder and the brass powder is 5: 1.
The high-temperature sintering temperature in step S3 was 1400 ℃.
The preparation method of the silver-copper alloy of the embodiment is the same as that of the embodiment 1, and the prepared finished silver-copper alloy product has the conductivity of 99.72IACS, the oxygen content of less than 6ppm and the hardness of more than 122HB through detection.
Example 4:
the silver-copper alloy material for manufacturing the commutator copper sheet comprises, by mass, 0.010wt% of Ag, 0.04wt% of Al, 0.03wt% of Zn, 0.07wt% of nano acetylene black, and the balance of Cu and inevitable impurities, wherein the content of the impurities is less than 0.002 wt%.
Furthermore, the alloy also comprises 0.08wt% of RE, wherein the RE is selected from lanthanum and cerium compositions, and the mass ratio of the RE to the lanthanum to cerium compositions is 2: 1.
Wherein the Ag raw material is selected from electrolytic silver with the purity of more than 99.9 percent, the Al raw material is selected from aluminum bronze, the Zn raw material is selected from brass, and the Cu raw material is selected from electrolytic copper with the purity of more than 99.9 percent, aluminum bronze and brass.
Based on the raw material proportion and selection, the silver-copper alloy material for manufacturing the commutator copper sheet is prepared by the following steps,
1) prefabricating porous aluminum bronze and porous brass containing nano acetylene black, and dividing RE into two parts for later use;
2) putting electrolytic copper into a melting furnace for heating and melting, then adding electrolytic silver into the melting furnace, stirring and melting, then sequentially adding the porous aluminum bronze, one part of RE, the porous brass and the rest of RE in the step 1), covering carbon slag on the surface layer, melting, finally taking out a bag, preparing a copper sheet crude product by adopting upward continuous casting and calendering, and obtaining the commutator copper sheet by rolling and annealing treatment.
Furthermore, the prefabrication method of the porous aluminum bronze and the porous brass containing the nanometer acetylene black in the step 1) comprises the following steps,
s1, taking the aluminum bronze and the brass, and performing ball milling treatment respectively to obtain aluminum bronze powder and brass powder;
s2, preparing a mixed solution of a 10% polyvinyl alcohol solution and a borax water solution, and then respectively adding the mixed solution into the aluminum bronze powder and the brass powder to obtain two mixed materials;
and S3, adding the nano acetylene black into the two mixtures respectively in two parts, uniformly mixing, preparing an alloy blank by adopting an organic foam impregnation method, and sintering at high temperature in a nitrogen atmosphere to obtain the porous aluminum bronze and the porous brass containing the nano acetylene black.
In the step S1, the ball milling treatment is performed by using 80vt% ethanol aqueous solution as a grinding fluid, and the particle size after ball milling is required to be less than 1 mm.
And step S2, the volume ratio of the 10% polyvinyl alcohol solution to the borax water solution in the mixed solution is 10:0.5, and the adding ratio of the mixed solution to the aluminum bronze powder and the brass powder is 5: 1.
The high-temperature sintering temperature in step S3 was 1300 ℃.
The preparation method of the silver-copper alloy of the embodiment is the same as that of the embodiment 1, and the prepared silver-copper alloy finished product has the conductivity of 99.12IACS, the oxygen content of less than 6ppm and the hardness of more than 129HB through detection.
Comparative example 1:
based on the example 1, the nano acetylene black is not added, other conditions are not changed, the silver-copper alloy is melted and drawn up for continuous casting to prepare a finished product, the conductivity of the prepared silver-copper alloy can reach 97.31IACS, the oxygen content is less than 10ppm, and the hardness is more than 103 HB.
Comparative example 2:
based on the example 1, aluminum bronze and brass are not added, the nano acetylene black is directly added in the melting process, other conditions are not changed, and the finished product is prepared by upward continuous casting, so that the conductivity of the prepared silver-copper alloy can reach 98.10IACS, the oxygen content is less than 16ppm, and the hardness is more than 109 HB.
Blank example:
based on the example 1, aluminum bronze, brass and nano acetylene black are not added, other conditions are not changed, the silver-copper alloy is directly melted and is drawn up for continuous casting to prepare a finished product, the conductivity of the prepared silver-copper alloy can reach 96.45IACS, the oxygen content is less than 26ppm, and the hardness is more than 96 HB.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The silver-copper alloy material for manufacturing the commutator copper sheet is characterized in that: the alloy comprises, by mass, 0.05-0.15% of Ag, 0.02-0.05% of Al, 0.02-0.05% of Zn, 0.01-0.1% of nano acetylene black, and the balance of Cu and inevitable impurities, wherein the content of the impurities is less than 0.002%.
2. The silver-copper alloy material for commutator copper sheet production according to claim 1, wherein: also comprises 0-0.08wt% of RE, wherein the RE is selected from lanthanum and cerium composition, and the mass ratio of the two is 2: 1.
3. The silver-copper alloy material for commutator copper sheet production according to claim 2, wherein: the Ag raw material is selected from electrolytic silver with the purity of more than 99.9%, the Al raw material is selected from aluminum bronze, the Zn raw material is selected from brass, and the Cu raw material is selected from electrolytic copper with the purity of more than 99.9%, aluminum bronze and brass.
4. The silver-copper alloy material for manufacturing commutator copper sheets as claimed in claim 3, wherein the preparation method is,
prefabricating porous aluminum bronze and porous brass containing nano acetylene black, and dividing RE into two parts for later use;
putting electrolytic copper into a melting furnace for heating and melting, then adding electrolytic silver into the melting furnace, stirring and melting, then sequentially adding the porous aluminum bronze, one part of RE, the porous brass and the rest of RE in the step 1), covering carbon slag on the surface layer, melting, finally taking out a bag, preparing a copper sheet crude product by adopting upward continuous casting and calendering, and obtaining the commutator copper sheet by rolling and annealing treatment.
5. The silver-copper alloy material for commutator copper sheet production according to claim 4, wherein: the method for prefabricating the porous aluminum bronze and the porous brass containing the nanometer acetylene black in the step 1) comprises the following steps,
s1, taking the aluminum bronze and the brass, and performing ball milling treatment respectively to obtain aluminum bronze powder and brass powder;
s2, preparing a mixed solution of a 10% polyvinyl alcohol solution and a borax water solution, and then respectively adding the mixed solution into the aluminum bronze powder and the brass powder to obtain two mixed materials;
and S3, adding the nano acetylene black into the two mixtures respectively in two parts, uniformly mixing, preparing an alloy blank by adopting an organic foam impregnation method, and sintering at high temperature in a nitrogen atmosphere to obtain the porous aluminum bronze and the porous brass containing the nano acetylene black.
6. The silver-copper alloy material for commutator copper sheet production according to claim 5, wherein: in the step 1), the ball milling treatment is carried out by taking 70-80vt% ethanol water solution as grinding liquid, and the particle size is required to be less than 1mm after ball milling.
7. The silver-copper alloy material for commutator copper sheet production according to claim 5, wherein: the volume ratio of the 10 percent polyvinyl alcohol solution to the borax water solution in the mixed solution in the step 2) is 10:0.4-0.8, and the adding ratio of the mixed solution to the aluminum bronze powder and the brass powder is 5: 1.
8. The silver-copper alloy material for commutator copper sheet production according to claim 5, wherein: the high-temperature sintering temperature in the step 3) is 1300-1400 ℃.
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