CN117344173A - Ag-based electric contact material and preparation method thereof - Google Patents
Ag-based electric contact material and preparation method thereof Download PDFInfo
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- CN117344173A CN117344173A CN202311326231.7A CN202311326231A CN117344173A CN 117344173 A CN117344173 A CN 117344173A CN 202311326231 A CN202311326231 A CN 202311326231A CN 117344173 A CN117344173 A CN 117344173A
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- 239000000463 material Substances 0.000 title claims abstract description 95
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 45
- 238000002844 melting Methods 0.000 claims abstract description 33
- 230000008018 melting Effects 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000003723 Smelting Methods 0.000 claims description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 238000000137 annealing Methods 0.000 claims description 16
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 238000010622 cold drawing Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 229910052706 scandium Inorganic materials 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 13
- 229910052709 silver Inorganic materials 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 238000005498 polishing Methods 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 238000002679 ablation Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000636 Ce alloy Inorganic materials 0.000 description 1
- -1 ag 5 La Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
-
- 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
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- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- 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
- C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention discloses an Ag-based electric contact material and a preparation method thereof, and belongs to the technical field of metal-based contact materials. The Ag-based electric contact material comprises the following elements in percentage by weight: sc:1% -4.0%, la:0.01% -1.0%, Y:0.01% -1.0% and the balance of Ag, and the Ag-based electric contact material is prepared by proportioning, vacuum arc melting, room temperature rolling, first vacuum heat treatment, cold drawing, second vacuum heat treatment and third vacuum heat treatment in sequence. According to the invention, sc, la, Y, ag is subjected to mutual reaction through the processes of vacuum arc melting, rolling, drawing and vacuum heat treatment, and the types, the numbers and the sizes of the educts are regulated and controlled to obtain the Ag-based electric contact material with good electric contact performance and mechanical property.
Description
Technical Field
The invention belongs to the technical field of metal-based contact materials, and particularly relates to an Ag-based electric contact material and a preparation method thereof.
Background
Silver alloys and silver composites are the most commonly used electrical contact materials because of its excellent thermal conductivity, electrical conductivity, corrosion resistance, etc. However, silver has disadvantages including poor mechanical properties and insufficient resistance of the surface to arcing, low electrical life, unreliable operation, and susceptibility to fusion welding. It is common to use alloying or methods of preparing the second phase composite material to improve the electrical contact properties of silver.
Rare earths have chemical properties due to their special electronic structure, which makes them known as "industrial vitamins" in the field of materials research. The silver-based contact material prepared by adding rare earth into silver is derived from the middle 50 th century, and the mechanical property of silver alloy is improved by adding a small amount of rare earth, and the important electric contact properties of the material such as arc ablation resistance, fusion welding resistance and oxidation resistance are also greatly improved. Research work on an electric contact material composed of rare earth elements and Ag is carried out at home and abroad, and AgCe and Ag-Cu-Ce alloy electric contact materials are developed. In the prior art, although the rare earth metal is obviously improved in grain refinement and strengthening of silver-based materials, the most important electric contact performance improvement of arc ablation resistance of the materials in the use process is not obvious.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an Ag-based electric contact material and a preparation method thereof, wherein Sc, la and Y elements are added into the Ag-based electric contact material, and the electric contact performance of Ag is improved by utilizing the interaction between Sc, la, Y, ag elements.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1% -4.0%, la:0.01% -1.0%, Y:0.01% -1.0% and the balance Ag.
The invention also claims a preparation method of the Ag-based electric contact material, which comprises the following steps:
(1) According to the element proportion of the Ag-based electric contact material, the Sc block, the La block and the Y block are proportioned;
(2) Arc melting the prepared materials to obtain a button-shaped spindle;
(3) Adopting an X fluorescence analyzer to measure whether the element contents on the two sides of the spindle are uniform, if not, making the bottom surface of the spindle face upwards, and smelting for a plurality of times through the step (2) until the element contents on the two sides of the spindle are uniform;
(4) Rolling the material obtained in the step (3), performing first vacuum annealing heat treatment, repeatedly drawing and performing second vacuum annealing heat treatment to obtain a wire;
(5) And carrying out vacuum annealing heat treatment on the wire material for the third time to obtain the Ag-based electric contact material.
As a preferred embodiment of the present invention, the arc melting specifically includes: vacuum degree<1×10 -1 Pa, then filling argon with the pressure of 0.9-1.0 atmosphere for smelting, wherein the smelting current is 50-100A, and the smelting time is 10-40 seconds.
The purity of the argon gas was 99.999%.
As a preferred embodiment of the present invention, the rolling temperature is room temperature and the rolling pass deformation is 1-5%.
As a preferred embodiment of the present invention, the first vacuum annealing heat treatment is carried out at 600-800℃for 2 hours at a vacuum degree<1×10 -2 Pa。
As a preferred embodiment of the present invention, the drawing temperature is room temperature and the pass deformation is 1-3%.
As a preferred embodiment of the present invention, the second vacuum annealing heat treatment is performed at 600-800℃for 1 hour, and the degree of vacuum is maintained<1×10 -2 Pa。
As a preferred embodiment of the present invention, the third vacuum annealing heat treatment is performed at a temperature of 600-800℃for 1 hour, and the degree of vacuum is<1×10 -2 Pa。
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, sc is utilized to carry out solid solution strengthening on the silver matrix, la and Y are mainly distributed on the grain boundary in the silver matrix, and the effect of strengthening the grain boundary is mainly achieved. In addition, the precipitate Ag is caused to react with Sc, la, Y, ag 5 La、Ag 5 Y、Ag 5 (YLa) and the like serve to improve the electrical contact performance of the Ag-based material. Meanwhile, sc, la, Y, ag is reacted by adopting the processes of vacuum arc melting, rolling, drawing and vacuum heat treatment, and the types, the numbers and the sizes of the educts are regulated and controlled to obtain the Ag-based electric contact material with good electric contact performance.
Drawings
FIG. 1 is a surface microstructure of the Ag-based electrical contact material prepared in example 1 after electrical contact test.
Fig. 2 is a schematic diagram of an arc test camera.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
Example 1
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, la:0.01%, Y:0.01%, the balance Ag.
The preparation method of the Ag-based electric contact material comprises the following steps:
(1) According to the element proportion of the Ag-based electric contact material, the Sc block, the La block and the Y block are proportioned;
(2) The materials to be preparedArc melting is carried out: first, the pre-vacuum degree is<1×10 -1 Pa, then filling argon with the pressure of 99.999 percent of 1.0 atmosphere for smelting, and repeatedly vacuumizing and inflating for 4 times; then arc melting is carried out, the melting current is 100A, the melting time is 40 seconds, and after a button-shaped spindle is formed through observation, the melting is stopped;
(3) Taking out, polishing the upper and lower surfaces of the spindle, measuring whether the content of Y, la and Sc on the two sides of the spindle is uniform or not by adopting an X fluorescence analyzer, and if the concentration of the Y, la and Sc on the two sides of the spindle reaches 0.01%, 0.01% and 1%, if the concentration of the Y, la and Sc is uneven and the concentration of the Y, la and Sc is not uniform, carrying out smelting for a plurality of times by the steps (1) and (2), and then, until the content of Y, la and Sc on the two sides of the spindle is uniform;
(4) Rolling the material obtained in the step (3) into a wire with the diameter of 10mm at room temperature, and carrying out vacuum degree of less than 1 multiplied by 10 -2 Annealing at 600 ℃ in Pa for 2 hours;
(5) Cold drawing to obtain a pass deformation of 3%, and vacuum at 600deg.C<1×10 -2 Heat treatment under Pa for 1 hour, and repeatedly carrying out cold drawing and vacuum heat treatment on the sample to obtain a wire rod with the diameter of 1 mm;
(6) The wires were vacuum heat treated at 800 ℃ for 1 hour to obtain Ag-based electrical contact materials.
Example 2
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:4%, la:1%, Y:1%, the balance being Ag.
The preparation method of the Ag-based electric contact material comprises the following steps:
(1) According to the element proportion of the Ag-based electric contact material, the Sc block, the La block and the Y block are proportioned;
(2) Arc melting the prepared materials: first, the pre-vacuum degree is<1×10 -1 Pa, then filling argon with the pressure of 99.999 percent of 0.9 atmosphere for smelting, and repeatedly vacuumizing and inflating for 4 times; then arc melting is carried out, the melting current is 100A, the melting time is 40 seconds, and after a button-shaped spindle is formed through observation, the melting is stopped;
(3) Taking out, polishing the upper and lower surfaces of the spindle, measuring whether the content of Y, la and Sc on the two sides of the spindle is uniform or not by adopting an X fluorescence analyzer, and if the concentration of the Y, la and Sc on the two sides of the spindle is 1%, 1% and 4%, if the concentration of the Y, la and Sc is not uniform, the bottom surface of the spindle is upward, and smelting for a plurality of times by adopting the steps (1) and (2) until the content of Y, la and Sc on the two sides of the spindle is uniform;
(4) Rolling the material obtained in the step (3) into a wire with the diameter of 10mm at room temperature, and carrying out vacuum degree of less than 1 multiplied by 10 -2 Annealing at 800 ℃ in Pa for 2 hours;
(5) Cold drawing to obtain a pass deformation of 1%, and vacuum at 800 deg.C<1×10 -2 Heat treatment under Pa for 1 hour, and repeatedly carrying out cold drawing and vacuum heat treatment on the sample to obtain a wire rod with the diameter of 1 mm;
(6) The wires were vacuum heat treated at 800 ℃ for 1 hour to obtain Ag-based electrical contact materials.
Example 3
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, la:1%, Y:1%, the balance being Ag.
The preparation method of the Ag-based electric contact material comprises the following steps:
(1) According to the element proportion of the Ag-based electric contact material, the Sc block, the La block and the Y block are proportioned;
(2) Arc melting the prepared materials: first, the pre-vacuum degree is<1×10 -1 Pa, then filling argon with the pressure of 99.999 percent of 0.9 atmosphere for smelting, and repeatedly vacuumizing and inflating for 4 times; then arc melting is carried out, the melting current is 100A, the melting time is 40 seconds, and after a button-shaped spindle is formed through observation, the melting is stopped;
(3) Taking out, polishing the upper and lower surfaces of the spindle, measuring whether the content of Y, la and Sc on the two sides of the spindle is uniform or not by adopting an X fluorescence analyzer, and if the concentration of the Y, la and Sc reaches 1%, 1% or not, if the concentration of the Y, la and Sc is not uniform, the bottom surface of the spindle is upward, and smelting for a plurality of times by the steps (1) and (2) until the content of Y, la and Sc on the two sides of the spindle is uniform;
(4) The material obtained in the step (3) is processedRolling into 10mm diameter wire at room temperature, and vacuum degree less than 1×10 -2 Annealing at 600 ℃ in Pa for 2 hours;
(5) Cold drawing to obtain a pass deformation of 1%, and vacuum at 700 deg.C<1×10 -2 Heat treatment under Pa for 1 hour, and repeatedly carrying out cold drawing and vacuum heat treatment on the sample to obtain a wire rod with the diameter of 1 mm;
(6) The wires were vacuum heat treated at 800 ℃ for 1 hour to obtain Ag-based electrical contact materials.
Example 4
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:4%, la:0.01%, Y:0.01%, the balance Ag.
The preparation method of the Ag-based electric contact material comprises the following steps:
(1) According to the element proportion of the Ag-based electric contact material, the Sc block, the La block and the Y block are proportioned;
(2) Arc melting the prepared materials: first, the pre-vacuum degree is<1×10 -1 Pa, then filling argon with the pressure of 99.999 percent of 0.9 atmosphere for smelting, and repeatedly vacuumizing and inflating for 4 times; then arc melting is carried out, the melting current is 50A, the melting time is 10 seconds, and after a button-shaped spindle is formed through observation, the melting is stopped;
(3) Taking out, polishing the upper and lower surfaces of the spindle, measuring whether the content of Y, la and Sc on the two sides of the spindle is uniform or not by adopting an X fluorescence analyzer, and if the concentration of the Y, la and Sc on the two sides of the spindle reaches 0.01%, 0.01% and 4%, if the concentration of the Y, la and Sc is uneven, the bottom surface of the spindle faces upwards, and smelting for multiple times by adopting the steps (1) and (2) until the content of Y, la and Sc on the two sides of the spindle is uniform;
(4) Rolling the material obtained in the step (3) into a wire with the diameter of 10mm at room temperature, and carrying out vacuum degree of less than 1 multiplied by 10 -2 Annealing at 600 ℃ in Pa for 2 hours;
(5) Cold drawing to obtain a pass deformation of 1%, and vacuum at 700 deg.C<1×10 -2 Heat treatment under Pa for 1 hour, and repeatedly carrying out cold drawing and vacuum heat treatment on the sample to obtain a wire rod with the diameter of 1 mm;
(6) The wires were vacuum heat treated at 800 ℃ for 1 hour to obtain Ag-based electrical contact materials.
Comparative example 1
An Ag-based electrical contact material comprises the following elements in percentage by weight: la:0.01%, Y:0.01%, the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 2
An Ag-based electrical contact material comprises the following elements in percentage by weight: la:1.00%, Y:0.02% and the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 3
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, Y:0.01%, the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 4
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, Y:0.02% and the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 5
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, la:0.01%, the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 6
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, la:0.02% and the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 7
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, ce:0.01%, Y:0.01%, the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 8
An Ag-based electrical contact material comprises the following elements in percentage by weight: ce:0.01%, Y:1.01% and the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 9
An Ag-based electrical contact material comprises the following elements in percentage by weight: lu:1%, Y:0.01%, la:0.01%, the balance Ag.
The preparation method of the Ag-based electrical contact material is the same as in example 1.
Comparative example 10
An Ag-based electrical contact material comprises the following elements in percentage by weight: sc:1%, la:0.01%, Y:0.01%, the balance Ag.
The preparation method of the Ag-based electric contact material comprises the following steps:
(1) According to the element proportion of the Ag-based electric contact material, the Sc block, the La block and the Y block are proportioned;
(2) Arc melting the prepared materials: first, the pre-vacuum degree is<1×10 -1 Pa, then filling argon with the pressure of 99.999 percent of 1.0 atmosphere for smelting, and repeatedly vacuumizing and inflating for 4 times; then arc melting is carried out, the melting current is 100A, the melting time is 40 seconds, and after a button-shaped spindle is formed through observation, the melting is stopped;
(3) Taking out, polishing the upper and lower surfaces of the spindle, measuring whether the content of Y, la and Sc on the two sides of the spindle is uniform or not by adopting an X fluorescence analyzer, and if the concentration of the Y, la and Sc on the two sides of the spindle reaches 0.01%, 0.01% and 1%, if the concentration of the Y, la and Sc is uneven and the concentration of the Y, la and Sc is not uniform, carrying out smelting for a plurality of times by the steps (1) and (2), and then, until the content of Y, la and Sc on the two sides of the spindle is uniform;
(4) Rolling the material obtained in the step (3) into a wire with the diameter of 10mm at room temperature;
(5) Drawing at room temperature, wherein the pass deformation is 3%, and obtaining a wire with the diameter of 1 mm;
(6) The wires were vacuum heat treated at 800 ℃ for 1 hour to obtain Ag-based electrical contact materials.
Effect example
The electric contact materials and pure Ag materials prepared in the examples and comparative examples were arc-measured under the dc 25V/25A test condition using an arc test photographing device shown in fig. 2, and the corresponding arc size and arc life were measured by processing the photographing results of the high-speed camera apparatus, and the data are shown in table 1. The arc test camera includes an electrical contact tester (commonly known as JF04C electrical contact tester) and a high speed camera device.
TABLE 1
As can be seen from table 1, the size and lifetime of the arc can be effectively reduced after adding two or three elements in Y, la, sc, ce, lu compared with the pure Ag material, but in comparative examples 7 to 10, the addition of Ce, lu or improper processing and heat treatment processes can play the opposite roles, resulting in melting phenomenon caused by too strong arc, and easily causing the problem of processing fracture of the material. From example 1 and comparative examples 1-6, it is evident that the size and life of the arc of the material are increased in the absence of a certain element, indicating that Sc, la, Y synergy can effectively reduce the size and life of the arc and the effect is significantly improved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. An Ag-based electrical contact material is characterized by comprising the following elements in percentage by weight: sc:1% -4.0%, la:0.01% -1.0%, Y:0.01 to 1.0 percent and the balance of Ag;
the preparation method of the Ag-based electric contact material is characterized by comprising the following steps:
(1) According to the element proportion of the Ag-based electric contact material, the Sc metal block, the La metal block, the Y metal block and the Ag metal block are proportioned;
(2) Arc melting the prepared materials to obtain a button-shaped spindle;
(3) Adopting an X fluorescence analyzer to measure whether the element contents on the two sides of the spindle are uniform, if not, making the bottom surface of the spindle face upwards, and smelting for a plurality of times through the step (2) until the element contents on the two sides of the spindle are uniform;
(4) Rolling the material obtained in the step (3), performing first vacuum annealing heat treatment, repeatedly drawing and performing second vacuum annealing heat treatment to obtain a wire;
(5) And carrying out vacuum annealing heat treatment on the wire material for the third time to obtain the Ag-based electric contact material.
2. Ag-based electrical contact material according to claim 1, characterized in that the arc melting comprises in particular: vacuum degree<1×10 -1 Pa, then filling argon with the pressure of 0.9-1.0 atmosphere for smelting, wherein the smelting current is 50-100A, and the smelting time is 10-40 seconds.
3. The Ag-based electrical contact material according to claim 1, wherein the rolling temperature is room temperature and the rolling pass deformation is 1 to 5%.
4. The Ag-based electrical contact material according to claim 1, wherein the first vacuum annealing heat treatment is performed at a temperature of 600 to 800 ℃ for 2 hours, and the degree of vacuum is<1×10 -2 Pa。
5. The Ag-based electrical contact material according to claim 1, wherein the drawing temperature is room temperature and the pass deformation is 1 to 3%.
6. The Ag-based electrical contact material according to claim 1, wherein the second vacuum annealing heat treatment is performed at a temperature of 600 to 800 ℃ for 1 hour, and the degree of vacuum is<1×10 -2 Pa。
7. The Ag-based electrical contact material according to claim 1, wherein the third vacuum annealing heat treatment is performed at a temperature of 600 to 800 ℃ for 1 hour, and the degree of vacuum is<1×10 -2 Pa。
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1507854A (en) * | 1974-04-01 | 1978-04-19 | Mallory & Co Inc P R | Electric contact materials |
| CN104313364A (en) * | 2014-10-10 | 2015-01-28 | 福达合金材料股份有限公司 | Process for preparing fine oxide particle reinforced silver-based electric contact material by oxidization-reduction method |
| US20180350530A1 (en) * | 2017-06-01 | 2018-12-06 | Siemens Industry, Inc. | Low-silver, low-profile electrical contact apparatus and assembly |
| CN114000006A (en) * | 2021-10-15 | 2022-02-01 | 昆明贵研新材料科技有限公司 | Silver-based composite material and preparation method thereof |
| CN114015989A (en) * | 2021-10-11 | 2022-02-08 | 芜湖映日科技股份有限公司 | Silver-scandium alloy sputtering target material and preparation method thereof |
-
2023
- 2023-10-13 CN CN202311326231.7A patent/CN117344173A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1507854A (en) * | 1974-04-01 | 1978-04-19 | Mallory & Co Inc P R | Electric contact materials |
| CN104313364A (en) * | 2014-10-10 | 2015-01-28 | 福达合金材料股份有限公司 | Process for preparing fine oxide particle reinforced silver-based electric contact material by oxidization-reduction method |
| US20180350530A1 (en) * | 2017-06-01 | 2018-12-06 | Siemens Industry, Inc. | Low-silver, low-profile electrical contact apparatus and assembly |
| CN114015989A (en) * | 2021-10-11 | 2022-02-08 | 芜湖映日科技股份有限公司 | Silver-scandium alloy sputtering target material and preparation method thereof |
| CN114000006A (en) * | 2021-10-15 | 2022-02-01 | 昆明贵研新材料科技有限公司 | Silver-based composite material and preparation method thereof |
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