CN114864305A - Copper support piece, preparation method thereof and electrical assembly - Google Patents
Copper support piece, preparation method thereof and electrical assembly Download PDFInfo
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- CN114864305A CN114864305A CN202210638451.2A CN202210638451A CN114864305A CN 114864305 A CN114864305 A CN 114864305A CN 202210638451 A CN202210638451 A CN 202210638451A CN 114864305 A CN114864305 A CN 114864305A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/025—Composite material having copper as the basic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
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Abstract
The invention provides a copper support piece and a preparation method thereof, and an electrical component, wherein the copper support piece comprises a first metal layer, a second metal layer and an intermediate metal layer, the first metal layer and the second metal layer are made of pure copper, copper alloy or composite copper material, the intermediate metal layer is made of iron or low-carbon steel, the three layers are compounded into a whole to form a layered composite material belt, the thickness of the first metal layer is greater than that of the second metal layer, and the first metal layer is coated on the side edge of the layered composite material belt, so that the intermediate metal layer is not exposed in the air; the first metal layer is used as a welding surface, the middle metal layer is used as a non-welding surface, and the welding surface is provided with a through hole penetrating through the thickness direction of the layered composite material belt. The invention effectively solves the problems of rusting and blocking mechanism of the electrical component, easy upwarp of an arc striking angle, climbing point welding, bad slag discharging and exhaust, thereby reducing the temperature rise of the electrical product, prolonging the electrical service life of the electrical product, shortening the welding procedure, greatly improving the quality of the electrical component, reducing the consumption of high-price copper and being suitable for batch production.
Description
Technical Field
The invention relates to the field of electrical devices, in particular to a copper support and a preparation method thereof, and an electrical assembly.
Background
The electric contact assembly of the low-voltage electrical appliances such as the circuit breaker, the relay, the contactor, the control switch and the like and the supporting piece thereof play a role in transferring current to form a loop when working, and the quality of the electric contact assembly directly influences the reliability and the stability of the electrical appliances such as the circuit breaker, the relay and the like.
The material of the electric contact support part is mostly copper-clad steel. The copper-clad steel has high strength and high plasticity, the electrical conductivity is good, but the magnetic element Fe in the middle layer is exposed in the air, so that rusting is easy to occur, the rust block is easy to fall off and is adsorbed inside an iron core of an electrical appliance, the attraction of the iron core is influenced, an internal mechanism is blocked and fails, the rust block is also easily adsorbed on an electrical contact, the trend of an electric arc is influenced, and the electrical service life of the electrical appliance product is influenced.
Through retrieval, few researches or reports on contact support materials for low-voltage electric appliances and preparation methods thereof are carried out at home and abroad.
For example: chinese patent publication No. CN105161380A discloses a circuit breaker electrical contact support and a method for making the same, wherein Cu/Fe/Cu composite material tape is inlaid with a copper block to replace the conventional product, but the magnetic element Fe contained in the support material is exposed in the air, which brings risks of affecting the arc trend and the service life of the electrical appliance.
Chinese patent publication No. CN102126112A discloses a method for preparing an electromagnetic shielding multilayer composite material in an electric vacuum device, which uses large deformation rolled Cu/Fe/Cu, but the composite material Fe of the method is also exposed in air, especially in a humid environment, and the service life of the electric appliance is obviously reduced.
Accordingly, there is a need to develop an electrical assembly that improves the reliability and service life of electrical devices such as circuit breakers.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a copper support, a preparation method thereof and an electrical assembly.
In a first aspect of the present invention, there is provided a copper support comprising:
the material of the first metal layer is pure copper, copper alloy or composite copper material;
the second metal layer is made of pure copper, copper alloy or composite copper material and is the same as or different from the first metal layer;
the middle metal layer is made of iron or low-carbon steel; the middle metal layer is arranged between the first metal layer and the second metal layer, and the first metal layer, the middle metal layer and the second metal layer are compounded into a whole to form a layered composite material belt;
the thickness of the first metal layer is larger than that of the second metal layer, the side edge of the layered composite material belt is coated by the first metal layer, the middle metal layer is not exposed in the air, the first metal layer serves as a welding surface, and the second metal layer and the middle metal layer serve as non-welding surfaces.
Preferably, the thickness of the first metal layer and the second metal layer is 5% -80% of the thickness of the whole laminated composite material belt.
Preferably, the welding surface is provided with a through hole penetrating through the thickness direction of the layered composite material strip and used for exhausting and deslagging in a welding central area; the non-welding surface is provided with a flow guide groove, and the flow guide groove is communicated with the through hole and used for guiding the redundant welding flux at the welding surface to two ends of the copper support piece.
Preferably, -the shape of the flow guide grooves is rectangular or cross-shaped;
the shape of the through hole is any of circular, rectangular, polygonal, elliptical, triangular, horseshoe-shaped.
Preferably, two ends of the layered composite material strip are bent towards the non-welding surface to form an arc striking angle.
In a second aspect of the present invention, a method for manufacturing the copper supporting member is provided, including:
stacking a first metal layer, an intermediate metal layer and a second metal layer in sequence, wherein the thickness of the first metal layer is greater than that of the second metal layer, then asymmetrically compounding the first metal layer, the intermediate metal layer and the second metal layer to obtain a layered composite material belt, and then carrying out heat treatment on the obtained layered composite material belt;
punching the layered composite material belt after heat treatment: and punching the first metal layer with large thickness to the second metal layer with small thickness, so that the first metal layer respectively wraps the two side edges of the layered composite material belt, and the middle metal layer is not exposed in the air, thereby obtaining the copper support member.
Preferably, after the punching of the heat-treated laminated composite material tape, the method further includes:
punching the first metal layer to form a through hole penetrating through the layered composite material belt in the thickness direction; furthermore, a concave diversion trench is processed on the outer surface of the second metal layer close to the through hole.
Preferably, the obtained layered composite material belt is subjected to heat treatment, wherein the heat treatment temperature is 300-800 ℃, the time is 2-6 hours, and the atmosphere is H 2 、N 2 Or an ammonia decomposition atmosphere.
In a third aspect of the invention, there is provided an electrical assembly comprising: the copper support and the electric contact are welded on the welding surface of the copper support.
Compared with the prior art, the invention has at least one of the following beneficial effects:
according to the copper supporting piece, the middle metal layer containing Fe element is wrapped between the two copper layers, so that the side edge of the copper supporting piece is wrapped by the Cu layer, Fe of the middle metal layer is not exposed in the air, and the problem that a conventional Cu/Fe/Cu copper piece is easy to rust is solved, so that the service life of an electric appliance product is prolonged, and the problem that a mechanism of an electric appliance is locked due to rusting is solved; meanwhile, by arranging copper layers with different thicknesses, taking the layer with the thick copper layer as a welding surface and taking the layer with the thin copper layer as a non-welding surface, the conductivity of the copper supporting piece is improved by 30 percent compared with that of a conventional product, the problem of conductivity of the copper supporting piece is effectively solved, and the temperature rise of an electric appliance product is reduced.
According to the copper support piece, the hole is formed in the welding surface, the diversion trench is formed in the non-welding surface, so that redundant welding flux enters the diversion trench along the small hole in the welding process, and one-step welding of a plurality of parts such as the electric contact, the copper piece and the arc ignition angle is realized; meanwhile, the welding surface is punched, so that the effects of welding, exhausting and deslagging are achieved, the inconsistent situation of melting of the center and the edge of the contact solder with larger specification is effectively improved, insufficient welding or over-welding is prevented, the problem of excessive solder welding climbing is effectively solved, the welding process is greatly shortened, and the quality and the production cost of the electric appliance assembly are improved.
The electric assembly has the advantages of excellent electric performance, good mechanical performance, difficult rusting and the like.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a copper support according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of an electrical component according to embodiment 1 of the present invention;
fig. 3 is a partial structural schematic view of an electrical component according to an embodiment 1 of the present invention;
fig. 4 is a schematic structural view of an electrical component according to embodiment 2 of the present invention;
fig. 5 is a partial structural schematic view of an electrical component according to an embodiment 2 of the present invention;
fig. 6 is a schematic structural view of an electrical component according to embodiment 1 of the present invention;
the scores in the figure are indicated as: 1 is an electrical contact, 2 is a copper support, 3 is a through hole, 4 is a guiding groove, 5 is an arc striking angle, 201 is a first metal layer, 202 is an intermediate metal layer, and 203 is a second metal layer.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the present invention.
Referring to fig. 1, a schematic structural view of a copper supporting member according to a preferred embodiment of the present invention is shown, which includes: a first metal layer, an intermediate metal layer, and a second metal layer; the first metal layer is made of pure copper, copper alloy or composite copper material; the second metal layer is made of pure copper, copper alloy or composite copper material, and is the same as or different from the first metal layer; the intermediate metal layer is made of iron or low-carbon steel. In particular embodiments, the copper alloy may be a low resistivity copper alloy such as oxygen free copper, brass, iron bronze, copper nickel alloy, and the like. The composite copper material can be a layered composite copper material or a particle reinforced composite copper material. The middle metal layer is arranged between the first metal layer and the second metal layer, and the first metal layer, the middle metal layer and the second metal layer are compounded into a whole to form the layered composite material belt, namely, the lower surface of the middle metal layer is connected with the upper surface of the first metal layer, and the upper surface of the middle metal layer is connected with the lower surface of the second metal layer; the thickness of the first metal layer is larger than that of the second metal layer, the middle metal layer exposed at the side edge of the layered composite material belt is wrapped inside by the first metal layer, so that the middle metal layer is not exposed in the air, and the problem that a conventional Cu/Fe/Cu copper piece is easy to rust is solved, so that the service life of an electric appliance product is prolonged, and the problem that a mechanism of an electric appliance is blocked due to rusting is solved.
The first metal layer is used as a welding surface, and the second metal layer is used as a non-welding surface. The copper support member formed by the structure has the advantages that the copper layer on the welding surface is thick, and the copper layer on the non-welding surface is thin, so that the conductivity of the copper support member is improved by 30% compared with that of a conventional product, the problem of conductivity of the copper support member is effectively solved, and the temperature rise of an electric appliance product is reduced.
In some preferred embodiments, the thickness of the first metal layer and the second metal layer is 5% to 80% of the thickness of the whole laminated composite tape.
In order to improve the subsequent welding quality, in some preferred embodiments, the welding surface is provided with a through hole penetrating through the thickness direction of the laminated composite material strip, and the through hole is used for exhausting and deslagging in the welding central area. Specifically, the shape of the through hole can adopt, but is not limited to, the following shapes: any one of circular, rectangular, polygonal, elliptical, triangular and horseshoe shapes, and other shapes which can satisfy the slag discharge and exhaust functions of the welding center region can also be adopted.
Further, in some preferred embodiments, in order to drain the solder during the soldering, a diversion trench may be provided on the non-soldering surface, and the diversion trench communicates with the through hole for draining the excess solder at the soldering surface to both ends of the copper support. In a preferred embodiment, the shape of the flow guide groove is not limited to a rectangular shape or a cross shape, and other shapes that satisfy the solder flow function may be used.
In other preferred embodiments, two ends of the laminated composite material belt are bent towards the non-welding surface to form an arc striking angle so as to guide the electric arc to be far away from the movable and static silver point working surface and to be scattered outwards.
In a specific embodiment, the copper support may be prepared by a method comprising:
s100, sequentially stacking a first metal layer, an intermediate metal layer and a second metal layer, wherein the thickness of the first metal layer is larger than that of the second metal layer, then asymmetrically compounding the first metal layer, the intermediate metal layer and the second metal layer to obtain a layered composite material belt, and then carrying out heat treatment on the obtained layered composite material belt. The asymmetric compounding in the step refers to: rolling and compounding the first metal layer, the middle metal layer and the second metal layer into a whole. The metal layers on the two sides of the middle metal layer have different thicknesses, and the cross-sectional structure of the layered composite material belt is asymmetric.
S200, punching the layered composite material belt after heat treatment: and punching from the first metal layer with large thickness to the second metal layer with small thickness to enable the first metal layer to wrap the two side edges of the layered composite material belt, so that the middle metal layer positioned in the middle is not exposed in the air, and the copper support piece is obtained.
In some preferred embodiments, in the above method for manufacturing a copper supporting member, after the punching the heat-treated laminated composite material tape, the method may further include: and punching the first metal layer, and forming a through hole penetrating through the first metal layer in the thickness direction of the layered composite material belt for exhausting and deslagging in the welding center area. Furthermore, a concave diversion trench can be processed on the outer surface of the second metal layer close to the through hole and used for diverting the redundant solder at the welding surface to two ends of the copper support piece.
In some preferred embodiments, in the preparation method of the copper support, the obtained laminated composite material belt is subjected to heat treatment, wherein the temperature is 300-800 ℃, the time is 2-6 hours, and the atmosphere is H 2 、N 2 Or an ammonia decomposition atmosphere.
Based on the structural features of the copper support in the above embodiment, in another embodiment of the present invention, an electrical assembly is provided, which includes the above copper support and an electrical contact, wherein the electrical contact is soldered to a soldering surface of the copper support.
The following examples further illustrate the structural features and the manufacturing method of the copper supporting member, taking three electrical components respectively including the copper supporting member described in the above embodiments as examples, and it should be noted that the following examples are not intended to limit the present invention.
Example 1
Referring to fig. 2 and 3, the structure of the electrical assembly is schematically illustrated, and the diagram includes: the device comprises an electric contact 1 and a copper support, wherein the electric contact 1 is made of AgSnO2 material; as shown in fig. 1, the copper supporting member includes a first metal layer, an intermediate metal layer, and a second metal layer, in this embodiment, the first metal layer and the second metal layer both use pure copper, and the intermediate metal layer is pure iron, that is, the copper supporting member uses a Cu/Fe/Cu layered composite material tape.
The preparation method of the electrical component comprises the following steps:
s1: the method comprises the following steps of sequentially stacking a pure Cu strip, a pure Fe strip and a pure Cu strip, and carrying out asymmetric cold rolling compounding to obtain a Cu/Fe/Cu material strip, wherein in the Cu/Fe/Cu material strip, an intermediate layer is a middle metal layer, the thickness of one outer Cu layer is 80% of the whole material strip, and the thickness of the other outer Cu layer is 10% of the whole material strip; the cross-sectional structure of the Cu/Fe/Cu material belt is asymmetrical. And then carrying out heat treatment on the obtained Cu/Fe/Cu material belt. The adopted heat treatment process parameters are as follows: the temperature was 800 ℃ and the time 2 hours, the atmosphere being H2.
S2: and punching the Cu/Fe/Cu material belt obtained in the step S1 from the Cu layer with large thickness to the Cu layer with small thickness, so that the Cu layer with large thickness wraps two side edges of the Cu/Fe/Cu material belt. And punching a circular through hole 3 on the welding surface of the Cu/Fe/Cu material belt, milling a rectangular diversion trench 4 on the non-welding surface of the Cu/Fe/Cu material belt and near the through hole, and bending two ends of the Cu/Fe/Cu material belt into arc-striking angles 5 in a U shape to obtain the copper support member of the Cu/Fe/Cu laminated composite material belt. The through-hole runs through whole copper support piece's thickness direction, and guiding gutter 4 bottom and through-hole intercommunication.
S3: and (3) welding an AgSnO2 electric contact on the welding surface of the copper support by adopting Ag50CuZn welding flux and an induction welding mode to obtain the required electric assembly.
According to the embodiment, the contactor electric contact electric assembly with good performance and low cost is finally obtained, so that the electric contact, the copper piece and the arc striking angle are firmly welded, the strength of the copper supporting piece of the electric assembly is effectively improved, the side edge of the copper supporting piece is not exposed with Fe, and the problem of rusting of the electric assembly is solved; meanwhile, the test shows that the conductivity of the copper support is increased by 30% compared with that of the conventional product, and the electrical service life is increased by 20% compared with that of the conventional product.
Example 2
Referring to fig. 4 and 5, the structure of the electrical assembly is schematically illustrated, wherein the electrical assembly includes an electrical contact 1 and a copper support, wherein the electrical contact 1 is made of AgNi 10; the copper part 2 is made of a Cu/Fe/Cu laminated composite material strip, the first metal layer is made of a red copper strip, the middle metal layer is made of a low-carbon steel strip, and the second metal layer is made of a Cu/H65 composite copper material.
In this embodiment, the method for manufacturing an electrical component includes the steps of:
s100: stacking a red copper strip, a low-carbon steel strip and a Cu/H65 composite copper material in sequence, and carrying out asymmetric cold rolling and claddingCombining to obtain the layered composite material belt, and then carrying out heat treatment. In the laminated composite material strip, the middle metal layer is low-carbon steel, the thickness of one outer side copper strip is 30% of the whole material strip, and the thickness of the other outer side Cu/H65 copper composite material is 5% of the whole material strip. The cross-sectional structure of the layered composite material belt is asymmetrical. The heat treatment adopts the following process parameters: the temperature is 450 ℃, the time is 4 hours, and the atmosphere is N 2 。
S200: and (3) punching the layered composite material belt obtained from the S100 from the red copper belt layer with large thickness to the Cu/H65 composite copper material layer with small thickness, so that the red copper belt layer with large thickness wraps the side edge of the layered composite material belt. And punching a polygonal through hole 3 on the welding surface of the laminated composite material strip, milling a cross-shaped diversion trench 4 on the non-welding surface of the laminated composite material strip and near the through hole, and bending an arc striking angle 5 in a U shape to prepare the copper support.
S300: and welding an AgNi10 electric contact on the welding surface of the laminated composite material belt by adopting Ag15CuP welding flux and a resistance welding mode to obtain the required electric assembly.
This embodiment finally obtains the better relay electrical contact electrical component of performance for electrical contact, copper spare are firmly welded, make copper support piece's intensity effectively improve, and copper support piece's side does not expose Fe, have solved the problem of rusting of electrical component, and copper support piece conductivity ratio conventional product has increased 15%, and the electricity life-span has increased 10% than conventional product.
In the method for preparing the electrical component in the embodiment, the method for preparing the electrical contact component by the asymmetric compounding and the special punching mode of wrapping the side edge of the layered composite material belt by the outer metal layer is suitable for preparing the electrical components in all fields of high-voltage electric appliances, medium-voltage electric appliances and low-voltage electric appliances.
Example 3
Referring to fig. 6, a schematic structural diagram of an electrical assembly is shown, which includes: the device comprises an electric contact 1 and a copper support, wherein the electric contact 1 is made of AgCdO 12; the copper support 2 is a Cu/Fe/Cu layered composite material belt, the first metal layer and the second metal layer are made of CuNi alloy materials, and the middle metal layer is made of low-carbon steel materials.
A method of making an electrical assembly comprising the steps of:
s10: sequentially stacking the CuNi strip, the low-carbon steel strip and the CuNi strip, carrying out asymmetric cold rolling compounding to obtain a CuNi/low-carbon steel/CuNi layered composite material strip, and carrying out heat treatment. In the CuNi/low-carbon steel/CuNi material belt, the middle metal layer is a low-carbon steel layer, the thickness of one outer CuNi layer is 50% of the whole material belt, and the thickness of the other outer CuNi layer is 15% of the whole material belt. The cross-sectional structure of the CuNi/low carbon steel/CuNi material belt is asymmetric. The heat treatment adopts the following technological parameters, the temperature is 680 ℃, the time is 3 hours, and the atmosphere is ammonia decomposition atmosphere.
S20: and punching the CuNi/low-carbon steel/CuNi material belt obtained from S10 from the CuNi layer with large thickness to the CuNi layer with small thickness, so that the CuNi layer with large thickness wraps the side edge of the CuNi/low-carbon steel/CuNi copper part. And punching a rectangular through hole 3 on the welding surface (namely the CuNi layer with large thickness) of the copper support piece to prepare the copper piece. Because the copper support has no arc striking angle, the non-welding surface and the vicinity of the through hole of the copper support also have no cross-shaped diversion trench.
S30: and adopting an Ag30CuZn solder and carbon rod welding mode to weld the AgCdO12 electric contact on the welding surface of the CuNi/low-carbon steel/CuNi copper piece to obtain the required electric assembly.
This embodiment finally obtains the better circuit breaker electrical contact electrical component of performance for electrical contact, copper spare are firmly welded, make copper support piece's intensity effectively improve, and copper support piece's side does not expose Fe, have solved the problem of rusting of electrical component, and copper support piece conductivity ratio conventional product has increased 20%, and the electricity life-span has increased 16% than conventional product.
The production process of the Cu/Fe/Cu laminated composite material belt copper part is simple in steps, convenient to implement, low in input cost and capable of greatly improving the strength of the produced electrical assembly, effectively solving the problems that a copper support part is easy to rust, a clamping mechanism and unstable in contact in a high-humidity and high-heat environment and further improving the opening and closing performance of a circuit breaker.
In conclusion, the invention effectively solves the problems of rusting of a clamping mechanism of an electrical component, easy upwarping of an arc striking angle, welding creeping point, bad slag discharge and exhaust, thereby reducing the temperature rise of electrical products, prolonging the electrical service life of the electrical products, shortening the welding process, greatly improving the quality of the electrical component, reducing the consumption of high-price copper, being suitable for mass production,
Some embodiments of the invention have been described above. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. A copper support, comprising:
the material of the first metal layer is pure copper, copper alloy or composite copper material;
the second metal layer is made of pure copper, copper alloy or composite copper material and is the same as or different from the first metal layer;
the middle metal layer is made of iron or low-carbon steel; the middle metal layer is arranged between the first metal layer and the second metal layer, and the first metal layer, the middle metal layer and the second metal layer are compounded into a whole to form a laminated composite material belt;
the thickness of the first metal layer is larger than that of the second metal layer, the side edge of the layered composite material belt is coated by the first metal layer, the middle metal layer is not exposed in the air, the first metal layer serves as a welding surface, and the second metal layer and the middle metal layer serve as non-welding surfaces.
2. The copper support of claim 1, wherein the first and second metal layers have a thickness of 5% to 80% of the thickness of the entire laminated composite tape.
3. The copper support according to claim 1, wherein the welding surface is provided with a through hole penetrating through the thickness direction of the laminated composite material strip for exhausting and deslagging in the welding center area.
4. The copper support according to claim 1 or 3, wherein the non-soldering surface is provided with a flow guiding groove, and the flow guiding groove is communicated with the through hole and is used for guiding the excessive solder at the soldering surface to two ends of the copper support.
5. The copper support according to claim 4, wherein the channels are rectangular or criss-cross in shape; the shape of the through hole is any one of circular, rectangular, polygonal, elliptical, triangular and horseshoe.
6. The copper support as claimed in claim 1, wherein the two ends of the laminated composite strip are bent towards the non-welding surface to form arc striking angles.
7. A method for producing a copper support according to any one of claims 1 to 6, comprising:
stacking a first metal layer, an intermediate metal layer and a second metal layer in sequence, wherein the thickness of the first metal layer is greater than that of the second metal layer, then asymmetrically compounding the first metal layer, the intermediate metal layer and the second metal layer to obtain a layered composite material belt, and then carrying out heat treatment on the obtained layered composite material belt;
punching the layered composite material belt after heat treatment: and punching the first metal layer with large thickness to the second metal layer with small thickness, so that the first metal layer respectively wraps the two side edges of the layered composite material belt, and the middle metal layer is not exposed in the air, thereby obtaining the copper support member.
8. The method for manufacturing a copper support according to claim 7, wherein after the punching the heat-treated laminated composite material strip, the method further comprises:
punching the first metal layer to form a through hole penetrating through the layered composite material belt in the thickness direction; further, a concave diversion trench is machined on the outer surface of the second metal layer, close to the through hole.
9. The method for preparing a copper support according to claim 7, wherein the obtained laminated composite material strip is subjected to heat treatment at 300-800 ℃ for 2-6 hours in an atmosphere of H 2 、N 2 Or an ammonia decomposition atmosphere.
10. An electrical assembly, comprising: the copper support and electrical contact of any of claims 1-6, said electrical contact being soldered to a soldering surface of said copper support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210638451.2A CN114864305A (en) | 2022-06-07 | 2022-06-07 | Copper support piece, preparation method thereof and electrical assembly |
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| CN202210638451.2A CN114864305A (en) | 2022-06-07 | 2022-06-07 | Copper support piece, preparation method thereof and electrical assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115842252A (en) * | 2022-11-30 | 2023-03-24 | 温州宏丰特种材料有限公司 | Electrical contact assembly and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115842252A (en) * | 2022-11-30 | 2023-03-24 | 温州宏丰特种材料有限公司 | Electrical contact assembly and preparation method thereof |
| CN115842252B (en) * | 2022-11-30 | 2023-09-22 | 温州宏丰特种材料有限公司 | Electrical contact assembly and preparation method thereof |
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