CN113990692A - 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
- CN113990692A CN113990692A CN202111264723.9A CN202111264723A CN113990692A CN 113990692 A CN113990692 A CN 113990692A CN 202111264723 A CN202111264723 A CN 202111264723A CN 113990692 A CN113990692 A CN 113990692A
- Authority
- CN
- China
- Prior art keywords
- contact
- alloy
- moving contact
- structural member
- resistant
- 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.)
- Granted
Links
Images
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 skin removal and rolling on a copper-chromium (zirconium) alloy cast ingot to obtain an alloy plate; placing the obtained alloy plate in a die, and preparing a moving contact and a static contact alloy base material by forging or punch forming; electroplating zinc electroplated layers on the whole surfaces of the alloy base materials of the moving contact and the static contact; removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and plating a silver-antimony alloy layer to obtain an alloy structural member of the moving contact and the static contact; and fixing the upper and lower contact alloy structural members, and then fixedly connecting the upper and lower contact alloy structural members with the isolating switch bracket. The invention adopts copper-chromium (zirconium) alloy as a base material to manufacture the self-force contact, the surface of the base material is covered with a thinner corrosion-resistant zinc electroplated layer, and a thicker, high-conductivity and wear-resistant silver-antimony alloy layer is brushed and plated on a contact area of the contact, so that the corrosion resistance effect and the wear resistance of the contact are improved, a spring structure is not required to be arranged, and the problem of spring shunt is solved.
Description
Technical Field
The invention belongs to the field of high-voltage electric 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, consists of a moving contact and a static contact, and is generally prepared by a method of electroplating pure silver on the surface of pure copper. Pure copper has excellent electric conduction, heat conduction and ductility, is the main material of preparation switch contact, but pure copper's intensity is low, and corrosion resistance is poor, and the adverse effect to the contact electric conduction is: the conductivity of the copper oxide film is extremely poor, and the contact resistance between the moving contact and the static contact after oxidation is very large; and pure copper is low in strength and easy to deform, so that the contact pressure is reduced, the contact resistance is further increased, and abnormal contact heating can occur when large current passes through the overlarge contact resistance.
The pure silver is electroplated on the surface of the pure copper mainly for solving the problem of poor corrosion resistance of the pure copper. Compared with copper, the silver oxide film has stronger conductivity and is easier to crack and decompose, so that the isolating switch contact is generally used for isolating a copper matrix from the atmosphere after silver is plated on the surface of pure copper, thereby avoiding the problem of abnormal heating caused by the oxidation of the surface of the contact. However, the pure silver plating layer has the problem of poor wear resistance, and due to the fact that the contact parts of the moving contact and the static contact are subjected to frictional wear, the exposed pure copper matrix after being worn is quickly oxidized and then still causes the problem of heating of the isolating switch, and the cost of the whole electroplating of the pure silver is high. In order to solve the problem of low strength of pure copper, the contact generally increases the pressing force between the moving contact and the fixed contact through a spring structure, the spring structure can cause the problem of contact shunt in the electrifying process, and the risk of abnormal heating of the contact can be increased.
The abnormal heating of the contact can aggravate the oxidation and the failure of the contact, even lead to the burning failure of the contact, can cause safety accidents, large-area power failure and increase the problems of time consumption, cost consumption and the like of maintenance and replacement, and seriously jeopardizes the safe and stable operation of a power grid.
Therefore, the strength and the corrosion resistance of the contact base material are improved, the wear resistance of the electroplated layer is improved, and the contact 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 a self-force contact, covers a thin corrosion-resistant zinc electroplated layer on the surface of the base material, and brushes and plates a thick high-conductivity wear-resistant silver-antimony alloy layer on a contact area of the contact, thereby improving the corrosion resistance and the wear resistance of the contact, prolonging the service life of the contact, solving the problem of spring shunt and improving the problem of environmental pollution in the preparation process.
The technical problem to be solved by the invention is realized by adopting the following technical scheme, and the manufacturing method of the high-strength wear-resistant corrosion-resistant contact provided by the invention comprises the following steps:
1) taking an ingot of copper-chromium alloy or copper-chromium-zirconium alloy with uniform components as a raw material, and carrying out solution heat treatment, water quenching, scale removal and rolling on the ingot to obtain an alloy plate;
2) placing the alloy plate obtained in the step 1) in a steel die or a graphite die, and preparing a moving contact alloy substrate and a static contact alloy substrate by adopting a precision forging or stamping forming method;
3) electroplating zinc electroplated layers on the surfaces of the alloy base material of the moving contact and the alloy base material of the static contact integrally by an electroplating method;
4) removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and then brushing and plating a silver-antimony alloy layer in the area to obtain a moving contact alloy structural member I and a static contact alloy structural member II;
5) and fixedly connecting the upper moving contact alloy structural member I and the lower moving contact alloy structural member I through bolt and nut fittings, then fixedly connecting the moving contacts with the isolating switch bracket I, and fixedly connecting the upper static contact alloy structural member II and the lower static contact alloy structural member II with the isolating switch bracket II through bolt and nut fittings, thus finally obtaining the high-strength wear-resistant corrosion-resistant contact.
Further, in the step 1), the mass percent of the chromium element in the raw material is 0.1-0.5%, the mass percent of the zirconium element is 0-0.05%, and the balance is the copper element.
Further, the mass percent 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 20-30 μm.
Further, the thickness of the silver-antimony alloy layer in the step 4) is 30-40 μm.
Furthermore, the bending areas of the moving contact alloy substrate and the static contact alloy substrate are also provided with thickening structures, and reinforcing ribs are also arranged on the moving contact alloy substrate and the static contact alloy substrate.
Further, the thickened structure and the reinforcing ribs are added by a forging method when the plate is formed in the step 1), or the thickened structure and the reinforcing ribs are added by a forging method when the contact alloy base material is formed in the step 2).
Further, the silver-antimony alloy layer protrudes out of the surface of the zinc electroplating layer.
Compared with the prior art, the invention has the following advantages:
(1) the invention adopts smelting and rolling processes to prepare the copper-chromium or copper-chromium-zirconium alloy as the self-operated contact base material, can meet the requirement of mass production, 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 the corrosion resistance of the alloy base material can increase the deformation resistance and the oxidation and 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 a self-force contact so as to solve the shunting problem of the traditional contact spring component.
(2) According to the invention, the thicker, high-conductivity and wear-resistant silver-antimony alloy layer is adopted in the contact area of the contact, and the zinc electroplated layer with lower cost and higher corrosion resistance is adopted in other areas, so that the effects of different areas can be exerted, and the manufacturing cost is saved due to the reduction of the consumption of precious metal silver. The pressing force between the contacts can be improved by adopting the copper-chromium alloy or the copper-chromium-zirconium alloy to replace a pure copper base material, and the self-force contact based on the copper-chromium alloy or the copper-chromium-zirconium alloy can replace the original contact with a spring structure to improve the shunting problem. The silver-antimony alloy layer mainly plays a role in high conductivity and wear resistance, and the zinc electroplated layer mainly plays a role in low cost and corrosion resistance.
(3) The thickening structure and the reinforcing rib structure of the moving contact and the static contact are beneficial to improving the deformation resistance of the contact, and the manufacturing requirement of the self-force contact is met. The improvement of the deformation resistance of the contact can ensure the pressing force of the moving contact and the static contact in the using process, and the problem of the increase of the contact resistance caused by the reduction of the pressing force is reduced.
(4) The invention improves the strength and the corrosion resistance of the contact base material, and can reduce the contact abnormal heating and even the contact burning accidents caused by the problems of rapid coating abrasion, matrix corrosion and shunt, thereby prolonging the service life of the contact.
Drawings
FIG. 1 is a schematic view of a high strength, wear and corrosion resistant contact according to the present invention;
FIG. 2 is a schematic view of a high strength, wear and corrosion resistant contact according to the present invention;
fig. 3 is a schematic view of a copper-chromium alloy structural member ii of the static contact of fig. 2;
fig. 4 is a schematic view of the moving contact copper-chromium alloy structural member i in fig. 2;
fig. 5 is a cross-sectional view of fig. 4.
The isolating switch comprises a movable contact 1, a fixed contact 2, an alloy base 3, a silver-antimony alloy layer 4, a zinc electroplated layer 5, a thickened structure 6, a reinforcing rib 7, a bolt-nut fitting 8, an isolating switch bracket I9, and an isolating switch bracket II 10.
Detailed Description
For a better understanding of the content of the invention, the invention will be further elucidated with reference to a specific embodiment and a drawing, without the scope of protection of the invention being limited to the following embodiments.
The invention relates to a manufacturing method of a high-strength wear-resistant corrosion-resistant contact, which comprises the following steps:
1) the ingot of copper chromium or copper chromium zirconium alloy with uniform components is used as a raw material, the mass percent of chromium element in the raw material is 0.1-0.5%, the mass percent of zirconium element is 0-0.05%, and the balance is copper element; carrying out solution heat treatment, water quenching, scale removal and rolling on the cast ingot to obtain an alloy plate; the processing technologies of solution heat treatment, water quenching, scale removal and rolling are carried out according to the processing technology of the copper-chromium alloy.
2) Placing the alloy plate obtained in the step 1) in a steel die or a graphite die, and preparing a moving contact alloy substrate and a static contact alloy substrate by adopting a precision forging or stamping forming method.
3) Electroplating zinc plating layers on the surfaces of the alloy base material of the moving contact and the alloy base material of the static contact integrally by an electroplating method, wherein the thickness of the zinc plating layers is 20-30 mu m.
4) Removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and then brushing and plating a silver-antimony alloy layer on the area, wherein the mass percent of antimony in the silver-antimony alloy layer is 0.5-1.5%, the balance is silver, and the thickness of the silver-antimony alloy layer is 30-40 mu m; finally obtaining a moving contact alloy structural member I and a static 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, then the moving contact is fixedly connected with the isolating switch support I, the upper static contact alloy structural member II and the lower static contact alloy structural member II are 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 upper moving contact alloy structural member I and the lower moving contact alloy structural member I are in mirror symmetry, and the upper static contact alloy structural member II and the lower static contact alloy structural member II are in mirror symmetry.
Preferably, the bending areas of the moving contact alloy substrate and the static contact alloy substrate can adopt thickened structures, and the moving contact copper-chromium alloy substrate and the static contact copper-chromium alloy substrate can also be provided with reinforcing rib structures.
Further, when the movable contact and the fixed contact have the thickening structures and the reinforcing rib structures, the thickening structures and the reinforcing rib structures can be added by a forging method during the plate forming in the step (1), and the thickening structures and the reinforcing rib structures can also be added by a forging method during the contact alloy base material forming 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 respectively 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, contact areas of the moving contact alloy structural member I and the static contact alloy structural member II cover the silver-antimony alloy layer by a brush plating method, and the silver-antimony alloy layer protrudes out of the surface of the zinc electroplated layer.
Furthermore, 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 be reliably and stably contacted conveniently, and meanwhile, the silver-antimony alloy layer is coated on the contact area of the static contact alloy structural member II in a brush plating mode.
Further, the alloy base materials of the moving contact alloy structural member I and the static contact alloy structural member II can be the same or different. The thicknesses of the zinc electroplated layers of the moving contact alloy structural member I and the static contact alloy structural member II can be the same or different, the antimony contents in the silver antimony alloy layers of the moving contact alloy structural member I and the static 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 of copper-chromium alloy with uniform components as a raw material, wherein the mass percent of chromium in the raw material is 0.3 percent, and the balance is copper; carrying out solution heat treatment, water quenching, scale removal and rolling on the cast ingot to obtain an alloy plate; the processing technologies of solution heat treatment, water quenching, scale removal and rolling are carried out according to the processing technology of the copper-chromium alloy.
2) Placing the alloy plate obtained in the step 1) in a steel die or a graphite die, and preparing a moving contact alloy substrate and a static contact alloy substrate by adopting a precision forging or stamping forming method.
3) Electroplating zinc electroplated layers on the surfaces of the alloy base material of the moving contact and the alloy base material of the static contact integrally by an electroplating method, wherein the thickness of the zinc electroplated layer of the moving contact is 20 micrometers, and the thickness of the zinc electroplated layer of the static contact is 25 micrometers.
4) Removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and then brushing and plating a silver-antimony alloy layer on the area, wherein the mass percent of antimony in the silver-antimony alloy layer is 0.5%, the balance is silver, the thickness of the moving contact silver-antimony alloy layer is 30 micrometers, the thickness of the static contact silver-antimony alloy layer is 35 micrometers, and finally obtaining a moving contact alloy structural member I and a static 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, then the moving contact is fixedly connected with the isolating switch support I, the fixed 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) the cast ingot of the copper-chromium-zirconium alloy with uniform components is taken as a raw material, the mass percent of chromium element in the raw material is 0.1%, the mass percent of zirconium element is 0.05%, and the balance is copper element; carrying out solution heat treatment, water quenching, scale removal and rolling on the cast ingot to obtain an alloy plate; the processing technologies of solution heat treatment, water quenching, scale removal and rolling are carried out according to the processing technology of the copper-chromium alloy.
2) Placing the alloy plate obtained in the step 1) in a steel die or a graphite die, preparing a moving contact alloy substrate and a static contact alloy substrate by adopting a precision forging method, simultaneously preparing a thickened structure in a bending area of the moving contact alloy substrate and the static contact alloy substrate by adopting a forging method, and preparing reinforcing ribs on the moving contact alloy substrate and the static contact alloy substrate by adopting the forging method.
3) Electroplating zinc electroplated layers on the surfaces of the alloy base material of the moving contact and the alloy base material of the static contact integrally by an electroplating method, wherein the thickness of the zinc electroplated layer of the moving contact is 25 mu m, and the thickness of the zinc electroplated layer of the static contact is 25 mu m.
4) Removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and then brushing and plating a silver-antimony alloy layer in the area, wherein the mass percent of antimony in the silver-antimony alloy layer is 1.5%, the balance is silver, the thickness of the moving contact silver-antimony alloy layer is 40 mu m, the thickness of the static contact silver-antimony alloy layer is 40 mu m, and finally obtaining a moving contact alloy structural member I and a static 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, then the moving contact is fixedly connected with the isolating switch support I, the fixed 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) the ingot of the copper-chromium-zirconium alloy with uniform components is used as a raw material, wherein the mass percent of chromium in the raw material is 0.5%, the mass percent of zirconium in the raw material is 0.03%, and the balance is copper; carrying out solution heat treatment, water quenching, scale removal and rolling on the cast ingot to obtain an alloy plate; the processing technologies of solution heat treatment, water quenching, scale removal and rolling are carried out according to the processing technology of the copper-chromium alloy.
2) Placing the alloy plate obtained in the step 1) in a steel die or a graphite die, preparing a moving contact alloy substrate and a static contact alloy substrate by adopting a precision forging method, simultaneously preparing a thickened structure in a bending area of the moving contact alloy substrate and the static contact alloy substrate by adopting a forging method, and preparing a reinforcing rib on the static contact alloy substrate by adopting the forging method.
3) Electroplating zinc electroplated layers on the surfaces of the alloy base material of the moving contact and the alloy base material of the static contact integrally by an electroplating method, wherein the thickness of the zinc electroplated layer of the moving contact is 30 micrometers, and the thickness of the zinc electroplated layer of the static contact is 25 micrometers.
4) Removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and then brushing and plating a silver-antimony alloy layer on the area, wherein the mass percent of antimony in the silver-antimony alloy layer is 0.8%, the balance is silver, the thickness of the moving contact silver-antimony alloy layer is 40 mu m, the thickness of the static contact silver-antimony alloy layer is 40 mu m, and finally the moving contact alloy structural member I and the static contact alloy structural member II are 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 fixed 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 of copper-chromium alloy with uniform components as a raw material, wherein the mass percent of chromium in the raw material is 0.5 percent, and the balance is copper; carrying out solution heat treatment, water quenching, scale removal and rolling on the cast ingot to obtain an alloy plate; the processing technologies of solution heat treatment, water quenching, scale removal and rolling are carried out according to the processing technology of the copper-chromium alloy.
2) Placing the alloy plate obtained in the step 1) in a steel die or a graphite die, preparing a moving contact alloy substrate and a static contact alloy substrate by adopting a precision forging method, simultaneously preparing a thickened structure in a bending area of the moving contact alloy substrate and the static contact alloy substrate by adopting a forging method, and preparing a reinforcing rib on the static contact alloy substrate by adopting the forging method.
3) Electroplating zinc electroplated layers on the surfaces of the alloy base material of the moving contact and the alloy base material of the static contact integrally by an electroplating method, wherein the thickness of the zinc electroplated layer of the moving contact is 20 micrometers, and the thickness of the zinc electroplated layer of the static contact is 20 micrometers.
4) Removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and then brushing and plating a silver-antimony alloy layer in the area, wherein the mass percent of antimony in the silver-antimony alloy layer is 1.2%, the balance is silver, the thickness of the moving contact silver-antimony alloy layer is 35 mu m, the thickness of the static contact silver-antimony alloy layer is 35 mu m, and finally the moving contact alloy structural member I and the static contact alloy structural member II are 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 fixed 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.
According to the invention, a copper-chromium alloy or copper-chromium-zirconium alloy ingot is used as a base material of a contact, an alloy plate is prepared by forging or punch forming, then a contact alloy base material is prepared, then a thinner zinc layer with lower cost and more corrosion resistance is electroplated on the surface of the alloy base material to serve as a protective layer of the alloy base material, a thicker, high-conductivity and wear-resistant silver-antimony alloy layer is prepared in a contact area of a moving contact and a fixed contact by adopting a brush plating method to serve as a surface protective layer of the contact area of the moving contact and the fixed contact, meanwhile, thickening treatment is carried out in a bending area of the moving contact and the fixed contact, a reinforcing rib structure can be further added on the moving contact and the fixed contact, a self-force type contact alloy structural member is prepared by the scheme, and then the self-force type contact alloy structural member is fixed together through a bolt and nut accessory and is fixed together with an isolation switch bracket. The method solves the problem of shunting of the traditional contact spring part, 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 falls off. The use amount of silver is reduced, so that the cost of protecting the surface of the contact is greatly reduced. The thickening structure and the reinforcing rib structure of the moving contact and the static contact are beneficial to improving the deformation resistance of the contact, and the manufacturing requirement of the self-force contact is met. The improvement of the deformation resistance of the contact can ensure the pressing force of the moving contact and the static contact in the using process, and the problem of the increase of the contact resistance caused by the reduction of the pressing force is reduced.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention in any way, and the present invention may also have other embodiments according to the above structures and functions, and is not listed again. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made within the technical scope of the present invention.
Claims (8)
1. A manufacturing method of a high-strength wear-resistant corrosion-resistant contact is characterized by comprising the following steps:
1) taking an ingot of copper-chromium alloy or copper-chromium-zirconium alloy with uniform components as a raw material, and carrying out solution heat treatment, water quenching, scale removal and rolling on the ingot to obtain an alloy plate;
2) placing the alloy plate obtained in the step 1) in a steel die or a graphite die, and preparing a moving contact alloy substrate and a static contact alloy substrate by adopting a precision forging or stamping forming method;
3) electroplating zinc electroplated layers on the surfaces of the alloy base material of the moving contact and the alloy base material of the static contact integrally by an electroplating method;
4) removing the zinc electroplated layer of the contact area of the moving contact and the static contact, and then brushing and plating a silver-antimony alloy layer in the area to obtain a moving contact alloy structural member I and a static contact alloy structural member II;
5) and fixedly connecting the upper moving contact alloy structural member I and the lower moving contact alloy structural member I through bolt and nut fittings, and then fixedly connecting the upper moving contact alloy structural member I and the lower moving contact alloy structural member I with the isolating switch bracket I, and fixedly connecting the upper static contact alloy structural member II and the lower static contact alloy structural member II with the isolating switch bracket II through bolt and nut fittings, thereby finally obtaining the high-strength wear-resistant corrosion-resistant contact.
2. The method according to claim 1, wherein in step 1), the raw material contains 0.1 to 0.5 mass% of chromium, 0 to 0.05 mass% of zirconium, and the balance of copper.
3. The manufacturing method according to claim 1, wherein the mass percent of antimony in the silver-antimony alloy layer in the step 4) is 0.5-1.5%, and the balance is silver.
4. The manufacturing method according to claim 1, wherein the thickness of the zinc plating layer in the step 3) is 20 to 30 μm.
5. The manufacturing method according to claim 1, wherein the thickness of the silver-antimony alloy layer in step 4) is 30 to 40 μm.
6. The manufacturing method of claim 1, wherein the bending areas of the moving contact alloy substrate and the static contact alloy substrate are further provided with thickened structures, and the moving contact alloy substrate and the static contact alloy substrate are further provided with reinforcing ribs.
7. The method of claim 6, wherein the upset-formations and ribs are added by forging during step 1) forming the plate, or wherein the upset-formations and ribs are added by forging during step 2) forming the contact alloy substrate.
8. The method of claim 1, wherein the ag-sb 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 true CN113990692A (en) | 2022-01-28 |
| CN113990692B 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024088088A1 (en) * | 2022-10-28 | 2024-05-02 | 温州泰钰新材料科技有限公司 | Electrical contact conductor |
Citations (9)
| 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 |
| US20170125179A1 (en) * | 2014-07-21 | 2017-05-04 | Nantong Memtech Technologies Co., Ltd. | Arc-ablation resistant switch contact and preparation method thereof |
| 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 |
| US20200005963A1 (en) * | 2017-03-07 | 2020-01-02 | Mitsubishi Materials Corporation | Corrosion-resistant terminal material, corrosion-resistant terminal, and wire-end structure |
| 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 |
-
2021
- 2021-10-28 CN CN202111264723.9A patent/CN113990692B/en active Active
Patent Citations (9)
| 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 |
| US20170125179A1 (en) * | 2014-07-21 | 2017-05-04 | Nantong Memtech Technologies Co., Ltd. | Arc-ablation resistant switch contact and preparation method thereof |
| US20200005963A1 (en) * | 2017-03-07 | 2020-01-02 | Mitsubishi Materials Corporation | Corrosion-resistant terminal material, corrosion-resistant terminal, and wire-end structure |
| 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 |
|---|
| 张秀丽;杨志远;彭波;王应高;陈存广;马光;陈云翔;: "粉末冶金制备高压隔离开关触头材料的可行性研究", 中国电力, vol. 53, no. 02, pages 129 - 135 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024088088A1 (en) * | 2022-10-28 | 2024-05-02 | 温州泰钰新材料科技有限公司 | Electrical contact conductor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113990692B (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI428480B (en) | Silver coated composite material for movable contact and method for producing same | |
| JP4834022B2 (en) | Silver coating material for movable contact parts and manufacturing method thereof | |
| CN101426960B (en) | Tin-plated Cu-Ni-Si alloy strip | |
| CN101345142B (en) | Electrical contact material with Ti3SiC2 multi-layer compound structure and preparation technique | |
| CN101092710B (en) | Production method of composite board of titanium / copper | |
| JP5184328B2 (en) | Silver coating material for movable contact parts and manufacturing method thereof | |
| CN113990692B (en) | Manufacturing method of high-strength wear-resistant corrosion-resistant contact | |
| JP2007138237A (en) | Silver-coated stainless steel strip for movable contact, and its production method | |
| 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 | |
| CN101235521B (en) | Energy-saving anode for non-ferrous metal electrodeposition | |
| CN101345141A (en) | Electrical contact material with Ti3SiC2 three-layer compound structure and preparation technique | |
| CN216389089U (en) | High-strength wear-resistant corrosion-resistant contact | |
| CN101791885A (en) | Nickel metal composite material and manufacturing method thereof | |
| CN101320642B (en) | Production method of electric contact point | |
| JP5244078B2 (en) | Fuel cell separator and method for producing the same | |
| CN1119842C (en) | Electrically conductive terminal cast with Al-Cu alloy | |
| JP2009099548A (en) | Silver-clad composite material for movable contact and its manufacturing method | |
| JP2012049041A (en) | Silver coating material for movable contact component and method for manufacturing the same | |
| JP6077884B2 (en) | Nonferrous metal electrowinning method and anode manufacturing method used therefor | |
| CN216389088U (en) | Corrosion-resistant composite contact | |
| CN101320643B (en) | Production method of electric contact point | |
| CN1399010A (en) | Making process of durable stainless steel cathode plate for copper electrolyzing refining | |
| CN1293237C (en) | Production method for electrical contact material | |
| JP2009099550A5 (en) |
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 |