CN113990692B - Manufacturing method of high-strength wear-resistant corrosion-resistant contact - Google Patents
Manufacturing method of high-strength wear-resistant corrosion-resistant contact Download PDFInfo
- Publication number
- CN113990692B CN113990692B CN202111264723.9A CN202111264723A CN113990692B CN 113990692 B CN113990692 B CN 113990692B CN 202111264723 A CN202111264723 A CN 202111264723A CN 113990692 B CN113990692 B CN 113990692B
- Authority
- CN
- China
- Prior art keywords
- contact
- alloy
- base material
- structural member
- silver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- C22C9/00—Alloys based on copper
-
- 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
- C22F1/08—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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/04—Electroplating with moving electrodes
- C25D5/06—Brush or pad plating
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Contacts (AREA)
Abstract
The invention relates to a manufacturing method of a high-strength wear-resistant corrosion-resistant contact, which comprises the steps of carrying out solution heat treatment, water quenching, oxide scale removal and rolling on a copper-chromium (zirconium) alloy cast ingot to obtain an alloy plate; placing the obtained alloy plate in a mould, and preparing a movable contact alloy base material by forging or stamping; electroplating a zinc electroplated layer on the surface of the alloy substrate of the movable contact and the fixed contact integrally; removing zinc electroplated layers in contact areas of the movable contact and the fixed contact, and brushing silver-antimony alloy layers to obtain alloy structural members of the movable contact and the fixed contact; the upper contact alloy structural member and the lower contact alloy structural member are fixed and then fixedly connected with the isolating switch bracket. The invention adopts copper-chromium (zirconium) alloy as a base material to manufacture the self-operated contact, the surface of the base material is covered with a thinner corrosion-resistant zinc electroplated layer, and a thicker high-conductivity wear-resistant silver-antimony alloy layer is brushed on the contact area of the contact, thereby improving the corrosion resistance and wear resistance of the contact, avoiding the arrangement of a spring structure and solving the problem of shunt of the spring.
Description
Technical Field
The invention belongs to the field of high-voltage electrical appliances, and particularly relates to a manufacturing method of a high-strength wear-resistant corrosion-resistant contact.
Background
The high-voltage isolating switch contact is one of important conductor materials of a transformer substation and consists of a moving contact and a fixed contact, and is generally prepared by adopting a pure silver electroplating method on the surface of pure copper. Pure copper has excellent electric conduction, heat conduction and ductility, is a main material for manufacturing a switch contact, but the pure copper has low strength and poor corrosion resistance, and has adverse effects on the electric conduction of the contact: the conductivity of the copper oxide film is extremely poor, and the contact resistance between the movable contact and the fixed contact after oxidation is extremely high; moreover, pure copper is low in strength and easy to deform, so that the contact pressure is reduced, the contact resistance is increased, and abnormal contact heating can occur when large current passes through the contact resistance.
Pure silver is electroplated on the surface of pure copper, which is mainly used for solving the problem of poor corrosion resistance of pure copper. Compared with copper, the silver oxide film has stronger conductivity and is more easily broken and decomposed, so that the isolating switch contact is generally used for isolating a copper matrix from the atmosphere after silver plating on the surface of pure copper, thereby avoiding the problem of abnormal heating caused by oxidation of the surface of the contact. However, the pure silver coating has the problem of poor wear resistance, and the bare and leaked pure copper matrix still causes the problem of heating of the isolating switch after being oxidized very fast due to friction and wear of the contact parts of the movable contact and the fixed contact, and the cost of integrally electroplating the pure silver is higher. In order to solve the problem of low pure copper strength, the contact generally increases the pressing force between the moving contact and the fixed contact through a spring structure, and the spring structure can cause the problem of contact split flow in the electrifying process, so that the risk of abnormal heating of the contact can be increased.
Abnormal heating of the contact can aggravate oxidation and failure of the contact, even cause burning out failure of the contact, and can cause safety accidents, large-area power failure, time and cost consumption for maintenance and replacement increase and other problems, so that safe and stable operation of a power grid is seriously jeopardized.
Therefore, the strength and corrosion resistance of the contact base material are improved, and the wear resistance of the electroplated layer is improved, so that the contact base material is an effective measure for relieving the heating problem of the contact.
Disclosure of Invention
In order to solve the problems, the invention provides a manufacturing method of a high-strength wear-resistant corrosion-resistant contact, which adopts copper-chromium (zirconium) alloy as a base material of the self-operated contact, a thinner corrosion-resistant zinc electroplated layer is covered on the surface of the base material, and a thicker high-conductivity wear-resistant silver-antimony alloy layer is brushed on a contact area of the contact, so that the corrosion resistance and wear resistance of the contact are improved, the service life of the contact is prolonged, the problem of shunt of a spring is solved, and the problem of environmental pollution in the preparation process is improved.
The invention solves the technical problems by adopting the following technical scheme, and provides a manufacturing method of a high-strength wear-resistant and corrosion-resistant contact, which comprises the following steps:
1) Taking a copper-chromium alloy or copper-chromium-zirconium alloy cast ingot with uniform components as a raw material, and obtaining an alloy plate after solution heat treatment, water quenching, oxide scale removal and rolling of the cast ingot;
2) Placing the alloy plate obtained in the step 1) in a die of a steel die or a graphite die, and preparing a moving contact alloy substrate and a fixed contact alloy substrate by adopting a precision forging or stamping forming method;
3) The surfaces of the movable contact alloy base material and the fixed contact alloy base material are integrally electroplated with zinc electroplated layers by an electroplating method;
4) Removing zinc electroplated layers in contact areas of the movable contact and the fixed contact, and then brushing silver-antimony alloy layers on the areas to obtain a movable contact alloy structural member I and a fixed contact alloy structural member II;
5) The upper and lower moving contact alloy structural members I are fixedly connected through bolt and nut fittings, then the moving contact is fixedly connected with the isolating switch bracket I, and the upper and lower fixed contact alloy structural members II are fixedly connected with the isolating switch bracket II through bolt and nut fittings, so that the high-strength wear-resistant and corrosion-resistant contact is finally obtained.
Further, in the step 1), the raw material contains 0.1-0.5% by mass of chromium element, 0-0.05% by mass of zirconium element, and the balance copper element.
Further, the mass percentage of antimony element in the silver-antimony alloy layer in the step 4) is 0.5-1.5%, and the balance is silver element.
Further, the thickness of the zinc plating layer in step 3) is 20 to 30 μm.
Further, the thickness of the silver-antimony alloy layer in the step 4) is 30-40 μm.
Further, the bending areas of the moving contact alloy base material and the fixed contact alloy base material are also provided with thickening structures, and reinforcing ribs are also arranged on the moving contact alloy base material and the fixed contact alloy base material.
Further, the thickening structure and the reinforcing ribs are added by a forging method during the forming of the plate in the step 1), or the thickening structure and the reinforcing ribs are added by a forging method during the forming of the contact alloy base material in the step 2).
Further, the silver-antimony alloy layer protrudes out of the surface of the zinc plating layer.
Compared with the prior art, the invention has the following advantages:
(1) The invention prepares copper-chromium or copper-chromium-zirconium alloy by adopting smelting and rolling processes, can meet the requirement of mass production as a self-operated contact base material, controls the cost of the contact, is not easy to deform, and can provide continuous pressing force without arranging a spring. Meanwhile, the improvement of the strength and corrosion resistance of the alloy base material can increase the deformation resistance and the oxidation corrosion resistance of the contact, so that the service life of the contact is prolonged, and the high-strength base material is beneficial to preparing the self-operated contact so as to solve the problem of shunting of the traditional contact spring component.
(2) The invention adopts thicker, high-conductivity and wear-resistant silver-antimony alloy layers in contact areas of the contacts, adopts zinc electroplated layers with lower cost and corrosion resistance in other areas, can exert the effects of different areas, and realizes the saving of manufacturing cost due to the reduction of the consumption of noble metal silver. The compression force between the contacts can be improved by adopting copper-chromium alloy or copper-chromium-zirconium alloy to replace a pure copper base material, and the self-operated contact based on the copper-chromium alloy or the copper-chromium-zirconium alloy can replace the original contact with a spring structure to solve the problem of shunt. Wherein the silver-antimony alloy layer mainly plays a role of high conductivity and wear resistance, and the zinc electroplated layer mainly plays a role of low cost and corrosion resistance.
(3) The thickening structure and the reinforcing rib structure of the movable contact and the fixed contact are beneficial to improving the deformation resistance of the contact, and meet the manufacturing requirements of the self-operated contact. The improvement of the deformation resistance of the contact can ensure the pressing force of the movable contact and the static contact in the using process, and reduce the problem of contact resistance increase caused by the reduction of the pressing force.
(4) The invention improves the strength and corrosion resistance of the contact base material, and can reduce the abnormal heating of the contact and even the burning accident of the contact caused by the problems of rapid abrasion of a plating layer, corrosion of a matrix and shunt, thereby prolonging the service life of the contact.
Drawings
FIG. 1 is a schematic view of the installation of a high strength wear and corrosion resistant contact of the present invention;
FIG. 2 is a schematic view of a high strength wear and corrosion resistant contact of the present invention;
FIG. 3 is a schematic view of the stationary contact Cu-Cr alloy structural member II of FIG. 2;
FIG. 4 is a schematic view of the moving contact Cu-Cr alloy structural member I of FIG. 2;
fig. 5 is a cross-sectional view of fig. 4.
The high-voltage power supply comprises a 1-moving contact, a 2-fixed contact, a 3-alloy substrate, a 4-silver-antimony alloy layer, a 5-zinc electroplated layer, a 6-thickening structure, 7-reinforcing ribs, 8-bolt and nut accessories, 9-isolating switch supports I and 10-isolating switch supports II.
Detailed Description
For a better understanding of the present invention, the present invention will be further described with reference to the following specific examples and drawings, but the scope of the present invention is not limited to the following examples.
The invention relates to a manufacturing method of a high-strength wear-resistant corrosion-resistant contact, which comprises the following steps:
1) Taking a copper-chromium or copper-chromium-zirconium alloy cast ingot with uniform components as a raw material, wherein the mass percentage of chromium element in the raw material is 0.1-0.5%, the mass percentage of zirconium element is 0-0.05%, and the balance is copper element; the cast ingot is subjected to solution heat treatment, water quenching, oxide scale removal and rolling to obtain an alloy plate; the processing technology of solution heat treatment, water quenching, oxide scale removal and rolling is carried out according to the copper-chromium alloy processing technology.
2) And (3) placing the alloy plate obtained in the step (1) in a die of a steel die or a graphite die, and preparing the moving contact alloy base material and the fixed contact alloy base material by adopting a precision forging or stamping forming method.
3) And integrally electroplating zinc electroplated layers on the surfaces of the movable contact alloy base material and the fixed contact alloy base material by an electroplating method, wherein the thickness of the zinc electroplated layers is 20-30 mu m.
4) Removing zinc electroplated layers in contact areas of the movable contact and the static contact, and then brushing a silver-antimony alloy layer in the area, wherein the mass percentage of antimony elements in the silver-antimony alloy layer is 0.5-1.5%, the balance is silver elements, and the thickness of the silver-antimony alloy layer is 30-40 mu m; finally, the moving contact alloy structural member I and the fixed contact alloy structural member II are obtained.
5) The upper and lower moving contact alloy structural members I are fixedly connected through bolt and nut fittings, then the moving contact is fixedly connected with the isolating switch bracket I, the upper and lower fixed contact alloy structural members II are fixedly connected with the isolating switch bracket II through bolt and nut fittings, and finally the high-strength wear-resistant corrosion-resistant contact shown in figure 1 is obtained, is not easy to deform, does not need to be provided with a spring structure, and is a self-operated contact.
The upper moving contact alloy structural member I and the lower moving contact alloy structural member I are mirror symmetry, and the upper fixed contact alloy structural member II and the lower fixed contact alloy structural member II are mirror symmetry.
Preferably, the bending areas of the moving contact alloy base material and the fixed contact alloy base material can adopt thickened structures, and reinforcing rib structures can be further arranged on the moving contact copper-chromium alloy base material and the fixed contact copper-chromium alloy base material.
Further, when the movable contact and the fixed contact have the thickening structure and the reinforcing rib structure, the thickening structure and the reinforcing rib structure can be added by a forging method during the forming of the plate in the step (1), and the thickening structure and the reinforcing rib structure can also be added by a forging method during the forming of the contact alloy base material in the step (2).
The high-strength wear-resistant corrosion-resistant moving contact alloy structural member I and the static contact alloy structural member II obtained by the method comprise a copper-chromium alloy base material, a zinc electroplated layer and a silver-antimony alloy layer, wherein the zinc electroplated layer covers the surface of the copper-chromium alloy base material by an electroplating method, the contact area of the moving contact alloy structural member I and the static contact alloy structural member II covers the silver-antimony alloy layer by a brushing plating method, and the silver-antimony alloy layer protrudes out of the surface of the zinc electroplated layer.
Further, the contact area of the static contact alloy structural member II protrudes towards the contact area of the moving contact alloy structural member I, so that the moving contact and the static contact can form reliable and stable contact, and meanwhile, the silver-antimony alloy layer is plated on the contact area of the static contact alloy structural member II.
Further, the materials of the alloy base materials of the movable contact alloy structural member I and the fixed contact alloy structural member II can be the same or different. The thicknesses of zinc electroplated layers of the moving contact alloy structural member I and the fixed contact alloy structural member II can be the same or different, the antimony content in the silver-antimony alloy layers of the moving contact alloy structural member I and the fixed contact alloy structural member II can be the same or different, and the thicknesses of the silver-antimony alloy layers can be the same or different.
Example 1:
1) Taking an ingot casting of copper-chromium alloy with uniform components as a raw material, wherein the mass percentage of chromium element in the raw material is 0.3%, and the balance is copper element; the cast ingot is subjected to solution heat treatment, water quenching, oxide scale removal and rolling to obtain an alloy plate; the processing technology of solution heat treatment, water quenching, oxide scale removal and rolling is carried out according to the copper-chromium alloy processing technology.
2) And (3) placing the alloy plate obtained in the step (1) in a die of a steel die or a graphite die, and preparing the moving contact alloy base material and the fixed contact alloy base material by adopting a precision forging or stamping forming method.
3) And the surfaces of the movable contact alloy base material and the fixed contact alloy base material are integrally electroplated with zinc electroplating layers by an electroplating method, wherein the thickness of the movable contact zinc electroplating layer is 20 mu m, and the thickness of the fixed contact zinc electroplating layer is 25 mu m.
4) And removing zinc electroplated layers in the contact areas of the moving contact and the static contact, and then brushing a silver-antimony alloy layer in the area, wherein the mass percentage of antimony elements in the silver-antimony alloy layer is 0.5%, the balance is silver elements, the thickness of the silver-antimony alloy layer of the moving contact is 30 mu m, and the thickness of the silver-antimony alloy layer of the static contact is 35 mu m, so that the moving contact alloy structural member I and the static contact alloy structural member II are finally obtained.
5) The upper moving contact alloy structural member I and the lower moving contact alloy structural member I are fixedly connected through a bolt and nut fitting, then the moving contact is fixedly connected with the isolating switch support I, the static contact alloy structural member II is fixedly connected with the isolating switch support II through a bolt and nut fitting, and finally the high-strength wear-resistant corrosion-resistant contact shown in the figure 1 is obtained.
Example 2:
1) Taking an ingot casting of copper-chromium-zirconium alloy with uniform components as a raw material, wherein the mass percentage of chromium element in the raw material is 0.1%, the mass percentage of zirconium element is 0.05%, and the balance is copper element; the cast ingot is subjected to solution heat treatment, water quenching, oxide scale removal and rolling to obtain an alloy plate; the processing technology of solution heat treatment, water quenching, oxide scale removal and rolling is carried out according to the copper-chromium alloy processing technology.
2) And (2) placing the alloy plate obtained in the step (1) in a die of a steel die or a graphite die, preparing a moving contact alloy base material and a fixed contact alloy base material by adopting a precision forging method, manufacturing a thickening structure in a bending area of the moving contact and the fixed contact alloy base material by adopting a forging method, and manufacturing reinforcing ribs on the moving contact alloy base material and the fixed contact alloy base material by adopting the forging method.
3) And (3) integrally electroplating zinc electroplated layers on the surfaces of the movable contact alloy base material and the fixed contact alloy base material by an electroplating method, wherein the thickness of the movable contact zinc electroplated layer is 25 mu m, and the thickness of the fixed contact zinc electroplated layer is 25 mu m.
4) And removing zinc electroplated layers in the contact areas of the moving contact and the static contact, and then brushing a silver-antimony alloy layer in the area, wherein the mass percentage of antimony elements in the silver-antimony alloy layer is 1.5%, the balance is silver elements, the thickness of the silver-antimony alloy layer of the moving contact is 40 mu m, and the thickness of the silver-antimony alloy layer of the static contact is 40 mu m, so that the moving contact alloy structural member I and the static contact alloy structural member II are finally obtained.
5) The upper moving contact alloy structural member I and the lower moving contact alloy structural member I are fixedly connected through a bolt and nut fitting, then the moving contact is fixedly connected with the isolating switch support I, the static contact alloy structural member II is fixedly connected with the isolating switch support II through a bolt and nut fitting, and finally the high-strength wear-resistant corrosion-resistant contact shown in the figure 1 is obtained.
Example 3:
1) Taking an ingot casting of copper-chromium-zirconium alloy with uniform components as a raw material, wherein the mass percentage of chromium element in the raw material is 0.5%, the mass percentage of zirconium element is 0.03%, and the balance is copper element; the cast ingot is subjected to solution heat treatment, water quenching, oxide scale removal and rolling to obtain an alloy plate; the processing technology of solution heat treatment, water quenching, oxide scale removal and rolling is carried out according to the copper-chromium alloy processing technology.
2) And (2) placing the alloy plate obtained in the step (1) in a die of a steel die or a graphite die, preparing a moving contact alloy base material and a fixed contact alloy base material by adopting a precision forging method, manufacturing a thickening structure in a bending area of the moving contact and the fixed contact alloy base material by adopting a forging method, and manufacturing a reinforcing rib on the fixed contact alloy base material by adopting the forging method.
3) And the surfaces of the movable contact alloy base material and the fixed contact alloy base material are integrally electroplated with zinc electroplating layers by an electroplating method, wherein the thickness of the movable contact zinc electroplating layer is 30 mu m, and the thickness of the fixed contact zinc electroplating layer is 25 mu m.
4) And removing zinc electroplated layers in the contact areas of the moving contact and the static contact, and then brushing a silver-antimony alloy layer in the area, wherein the mass percentage of antimony elements in the silver-antimony alloy layer is 0.8%, the balance is silver elements, the thickness of the silver-antimony alloy layer of the moving contact is 40 mu m, and the thickness of the silver-antimony alloy layer of the static contact is 40 mu m, so that the moving contact alloy structural member I and the static contact alloy structural member II are finally obtained.
5) The upper moving contact alloy structural member I and the lower moving contact alloy structural member I are fixedly connected through a bolt and nut fitting, then the moving contact is fixedly connected with the isolating switch support I, the static contact alloy structural member II is fixedly connected with the isolating switch support II through a bolt and nut fitting, and finally the high-strength wear-resistant corrosion-resistant contact shown in the figure 1 is obtained.
Example 4:
1) Taking an ingot casting of copper-chromium alloy with uniform components as a raw material, wherein the mass percentage of chromium element in the raw material is 0.5%, and the balance is copper element; the cast ingot is subjected to solution heat treatment, water quenching, oxide scale removal and rolling to obtain an alloy plate; the processing technology of solution heat treatment, water quenching, oxide scale removal and rolling is carried out according to the copper-chromium alloy processing technology.
2) And (2) placing the alloy plate obtained in the step (1) in a die of a steel die or a graphite die, preparing a moving contact alloy base material and a fixed contact alloy base material by adopting a precision forging method, manufacturing a thickening structure in a bending area of the moving contact and the fixed contact alloy base material by adopting a forging method, and manufacturing a reinforcing rib on the fixed contact alloy base material by adopting the forging method.
3) And the surfaces of the movable contact alloy base material and the fixed contact alloy base material are integrally electroplated with zinc electroplating layers by an electroplating method, wherein the thickness of the movable contact zinc electroplating layers is 20 mu m, and the thickness of the fixed contact zinc electroplating layers is 20 mu m.
4) And removing zinc electroplated layers in the contact areas of the moving contact and the static contact, and then brushing a silver-antimony alloy layer in the area, wherein the mass percentage of antimony elements in the silver-antimony alloy layer is 1.2%, the balance is silver elements, the thickness of the silver-antimony alloy layer of the moving contact is 35 mu m, and the thickness of the silver-antimony alloy layer of the static contact is 35 mu m, so that the moving contact alloy structural member I and the static contact alloy structural member II are finally obtained.
5) The upper moving contact alloy structural member I and the lower moving contact alloy structural member I are fixedly connected through a bolt and nut fitting, then the moving contact is fixedly connected with the isolating switch support I, the static contact alloy structural member II is fixedly connected with the isolating switch support II through a bolt and nut fitting, and finally the high-strength wear-resistant corrosion-resistant contact shown in the figure 1 is obtained.
The invention takes copper-chromium alloy or copper-chromium-zirconium alloy cast ingots as the base material of the contact, firstly prepares alloy plates by forging or stamping forming, then prepares the contact alloy base material, then electroplates a thinner, lower-cost and more corrosion-resistant zinc layer on the surface of the alloy base material as the protective layer of the alloy base material, adopts a brush plating method to manufacture a thicker, high-conductivity and wear-resistant silver-antimony alloy layer as the surface protective layer of the contact area of the movable contact and the static contact in the contact area of the movable contact and the static contact, simultaneously carries out thickening treatment in the bending area of the movable contact and the static contact, and can further increase a reinforcing rib structure on the movable contact and the static contact, thus preparing the self-operated contact alloy structural member, and then fixing the self-operated contact alloy structural member with a disconnecting switch bracket through bolt and nut fittings. The method solves the problem of shunt of the traditional contact spring component, remarkably improves the corrosion resistance of the base material on the basis of keeping higher conductivity, and delays the corrosion progress of the base material after the contact is separated. The use amount of silver is reduced, so that the cost of contact surface protection is greatly reduced. The thickening structure and the reinforcing rib structure of the movable contact and the fixed contact are beneficial to improving the deformation resistance of the contact, and meet the manufacturing requirements of the self-operated contact. The improvement of the deformation resistance of the contact can ensure the pressing force of the movable contact and the static contact in the using process, and reduce the problem of contact resistance increase caused by the reduction of the pressing force.
The foregoing is merely an embodiment of the present invention, and the present invention is not limited in any way, and may have other embodiments according to the above structures and functions, which are not listed. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention without departing from the scope of the technical solution of the present invention will still fall within the scope of the technical solution of the present invention.
Claims (7)
1. The manufacturing method of the high-strength wear-resistant corrosion-resistant contact is characterized by comprising the following steps of:
1) Taking a copper-chromium alloy or copper-chromium-zirconium alloy cast ingot with uniform components as a raw material, and obtaining an alloy plate after solution heat treatment, water quenching, oxide scale removal and rolling of the cast ingot;
2) Placing the alloy plate obtained in the step 1) in a die of a steel die or a graphite die, and preparing a moving contact alloy substrate and a fixed contact alloy substrate by adopting a precision forging or stamping forming method;
the bending areas of the moving contact alloy base material and the fixed contact alloy base material are also provided with thickening structures, and the moving contact alloy base material and the fixed contact alloy base material are also provided with reinforcing ribs;
3) The surfaces of the movable contact alloy base material and the fixed contact alloy base material are integrally electroplated with zinc electroplated layers by an electroplating method;
4) Removing zinc electroplated layers in contact areas of the movable contact and the fixed contact, and then brushing silver-antimony alloy layers on the areas to obtain a movable contact alloy structural member I and a fixed contact alloy structural member II;
5) The upper moving contact alloy structural member I and the lower moving contact alloy structural member I are fixedly connected through a bolt and nut fitting and then are fixedly connected with the isolating switch support I, and the upper fixed contact alloy structural member II and the lower fixed contact alloy structural member II are fixedly connected with the isolating switch support II through a bolt and nut fitting, so that a spring is not required to be arranged, and finally the high-strength wear-resistant corrosion-resistant contact is obtained.
2. The method according to claim 1, wherein the raw material in step 1) contains 0.1 to 0.5% by mass of chromium element, 0 to 0.05% by mass of zirconium element, and the balance copper element.
3. The method according to claim 1, wherein the silver-antimony alloy layer in step 4) contains 0.5 to 1.5% by mass of antimony element, and the balance being silver element.
4. The method according to claim 1, wherein the zinc plating layer in step 3) has a thickness of 20 to 30. Mu.m.
5. The method according to claim 1, wherein the silver-antimony alloy layer in step 4) has a thickness of 30 to 40 μm.
6. The method of manufacturing of claim 1, wherein the thickening structure and the reinforcing ribs are added by forging during the forming of the sheet material in step 1), or the thickening structure and the reinforcing ribs are added by forging during the forming of the contact alloy base material in step 2).
7. The method of manufacturing according to claim 1, wherein the silver-antimony alloy layer protrudes from the surface of the zinc plating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111264723.9A CN113990692B (en) | 2021-10-28 | 2021-10-28 | Manufacturing method of high-strength wear-resistant corrosion-resistant contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111264723.9A CN113990692B (en) | 2021-10-28 | 2021-10-28 | Manufacturing method of high-strength wear-resistant corrosion-resistant contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113990692A CN113990692A (en) | 2022-01-28 |
| CN113990692B true CN113990692B (en) | 2023-08-01 |
Family
ID=79743610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111264723.9A Active CN113990692B (en) | 2021-10-28 | 2021-10-28 | Manufacturing method of high-strength wear-resistant corrosion-resistant contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113990692B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117995570A (en) * | 2022-10-28 | 2024-05-07 | 温州泰钰新材料科技有限公司 | Electrical contact conductor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000226645A (en) * | 1999-02-03 | 2000-08-15 | Dowa Mining Co Ltd | Production of copper or copper base alloy |
| JP2001006468A (en) * | 1999-06-21 | 2001-01-12 | Mitsubishi Electric Corp | Gas insulated breaker |
| JP2007291510A (en) * | 2006-03-28 | 2007-11-08 | Furukawa Electric Co Ltd:The | Silver coated composite material for movable contact and method for producing the same |
| JP2010017720A (en) * | 2008-07-08 | 2010-01-28 | Fuji Electric Fa Components & Systems Co Ltd | Method of manufacturing electric contactor |
| CN109166739A (en) * | 2018-09-28 | 2019-01-08 | 苏州国嘉记忆合金有限公司 | A kind of switch touching head assembly |
| CN109167197A (en) * | 2018-09-17 | 2019-01-08 | 四川华丰企业集团有限公司 | A kind of high-voltage electric connector |
| CN211788777U (en) * | 2020-03-31 | 2020-10-27 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Low-resistance contact for high-voltage isolating switch and special cleaning tool thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112609B (en) * | 2014-07-21 | 2016-04-06 | 南通万德科技有限公司 | Switch contact of arc ablation resistance and preparation method thereof |
| CN110326168B (en) * | 2017-03-07 | 2022-02-01 | 三菱综合材料株式会社 | Corrosion-resistant terminal material, corrosion-resistant terminal, and wire terminal structure |
-
2021
- 2021-10-28 CN CN202111264723.9A patent/CN113990692B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000226645A (en) * | 1999-02-03 | 2000-08-15 | Dowa Mining Co Ltd | Production of copper or copper base alloy |
| JP2001006468A (en) * | 1999-06-21 | 2001-01-12 | Mitsubishi Electric Corp | Gas insulated breaker |
| JP2007291510A (en) * | 2006-03-28 | 2007-11-08 | Furukawa Electric Co Ltd:The | Silver coated composite material for movable contact and method for producing the same |
| JP2010017720A (en) * | 2008-07-08 | 2010-01-28 | Fuji Electric Fa Components & Systems Co Ltd | Method of manufacturing electric contactor |
| CN109167197A (en) * | 2018-09-17 | 2019-01-08 | 四川华丰企业集团有限公司 | A kind of high-voltage electric connector |
| CN109166739A (en) * | 2018-09-28 | 2019-01-08 | 苏州国嘉记忆合金有限公司 | A kind of switch touching head assembly |
| CN211788777U (en) * | 2020-03-31 | 2020-10-27 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Low-resistance contact for high-voltage isolating switch and special cleaning tool thereof |
Non-Patent Citations (1)
| Title |
|---|
| 粉末冶金制备高压隔离开关触头材料的可行性研究;张秀丽;杨志远;彭波;王应高;陈存广;马光;陈云翔;;中国电力;第53卷(第02期);第129-135页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113990692A (en) | 2022-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113990692B (en) | Manufacturing method of high-strength wear-resistant corrosion-resistant contact | |
| CN101550504B (en) | Manufacturing method of high-conductivity low-beryllium bronze band | |
| CN101426960B (en) | Tin-plated Cu-Ni-Si alloy strip | |
| CN101345142B (en) | Electrical contact material with Ti3SiC2 multi-layer compound structure and preparation technique | |
| CN101126166A (en) | Method for preparing lead-aluminum composite anode plate | |
| CN102626776A (en) | Preparing method of aluminum-based lead and lead alloy composite anode | |
| CN101562081B (en) | Preparation method of silver-saving laminating composite contact terminal piece | |
| CN101092710A (en) | Composite board of titanium / copper, and production method | |
| CN101333610B (en) | Ultra-high strengthen, high-conductivity CuNiSi series elastic copper alloy and method for preparing same | |
| CN101235521B (en) | Energy-saving anode for non-ferrous metal electrodeposition | |
| CN103710731A (en) | Composite anode used for wet metallurgy | |
| CN216389089U (en) | High-strength wear-resistant corrosion-resistant contact | |
| CN101320642B (en) | Production method of electric contact point | |
| KR101819219B1 (en) | Anode structure for electrolytic refining, manufacturing method and Electrowinning Equipment using the same | |
| JP6077884B2 (en) | Nonferrous metal electrowinning method and anode manufacturing method used therefor | |
| CN1270428A (en) | Electrically conductive terminal cast with Al-Cu alloy | |
| CN111101153A (en) | Composite anode plate for copper electrodeposition and preparation method thereof | |
| CN203639586U (en) | Composite anode for hydrometallurgy | |
| CN216389088U (en) | Corrosion-resistant composite contact | |
| CN1293237C (en) | Production method for electrical contact material | |
| CN110938840A (en) | Preparation method of lead-based anode plate for non-ferrous metal electrodeposition | |
| CN1265409C (en) | Copper/rare-earth oxide/carbon contact and method for producing same | |
| CN114171334A (en) | Preparation method of composite contact | |
| CN102627002A (en) | Preparation method of aluminum-base lead and lead alloy composite material | |
| CN205774824U (en) | Aluminum electrolyzing cell used anode steel claw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |