CN113862509B - High-strength extra-high voltage spring contact finger and processing technology thereof - Google Patents
High-strength extra-high voltage spring contact finger and processing technology thereof Download PDFInfo
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- CN113862509B CN113862509B CN202111114380.8A CN202111114380A CN113862509B CN 113862509 B CN113862509 B CN 113862509B CN 202111114380 A CN202111114380 A CN 202111114380A CN 113862509 B CN113862509 B CN 113862509B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
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Abstract
The invention discloses a high-strength extra-high voltage spring contact finger and a processing technology thereof, and particularly relates to the technical field of beryllium-copper spring contact fingers, including beryllium, cobalt, nickel, copper and rare earth silicon-aluminum alloy. The invention can effectively ensure the high strength and elastic property of the spring contact finger, effectively improve the high strength and high elasticity of the spring contact finger when used in a high-temperature environment, and ensure the normal use of the spring contact finger in extra-high voltage; the addition of nickel can effectively improve the high strength, hardness and wear resistance of the spring contact finger; the nickel and the silicon can form an intermetallic compound to strengthen the spring contact finger; the rare earth lanthanum can effectively perform deoxidation and desulfurization treatment on the beryllium-copper alloy, and simultaneously refine the tissue structure of the beryllium-copper alloy; the Ti/Al3Ti metal layered composite material and the Ni3Al phase with high elastic modulus can be formed in the beryllium copper alloy, so that the high strength, high modulus and ultrahigh energy absorption protection performance of the beryllium copper alloy can be effectively improved, and the high elastic performance of the spring contact finger can be effectively improved.
Description
Technical Field
The invention relates to the technical field of beryllium copper spring contact fingers, in particular to a high-strength extra-high voltage spring contact finger and a processing technology thereof.
Background
The spring finger is a special spring that can carry high currents in a small space and also acts as a purely mechanical connection. The spring contact finger is suitable for being used in various static or dynamic medium-high pressure environments. At present, the spring contact finger material is mainly selected from high-quality beryllium bronze or copper chromium zirconium alloy, wherein the beryllium bronze is a non-ferrous alloy elastic material with excellent comprehensive performance and is divided into a high-strength type and a high-conductivity type, and the high-strength type beryllium bronze is higher in strength and lower in conductivity than the high-conductivity type beryllium bronze. The extra-high voltage refers to voltage levels of ± 800 kv and more dc and 1000 kv and more ac. The core component of the extra-high voltage direct current transmission is a converter valve, a valve side wire outlet device for the converter transformer mainly comprises a wire outlet device shell, an internal insulation structure and a voltage-sharing ball, a valve side sleeve is arranged in the voltage-sharing ball, a connecting piece is electrically connected with a valve side lead, and the connecting piece is connected with a contact finger spring (watchband structure) on the sleeve side and the lead side.
When the existing beryllium bronze spring contact finger is used in extra-high voltage equipment, the strength and elasticity of the spring contact finger can be reduced under a high-temperature state, and the normal use of the spring contact finger is seriously influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a high-strength extra-high voltage spring contact finger and a processing technology thereof.
A high-strength extra-high voltage spring contact finger comprises the following components in percentage by weight: 0.40-0.70% of beryllium, 2.40-2.70% of cobalt, 1.80-2.40% of nickel, 0.30-0.50% of rare earth silicon aluminum alloy, less than 0.05% of total impurities and the balance of copper.
Further, the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.94 to 1.04 percent of rare earth lanthanum, 0.02 to 0.04 percent of silicon, 9.60 to 10.60 percent of titanium and the balance of aluminum.
Further, the paint comprises the following components in percentage by weight: 0.40% of beryllium, 2.40% of cobalt, 1.80% of nickel, 0.30% of rare earth silicon aluminum alloy, less than 0.05% of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.94% of rare earth lanthanum, 0.02% of silicon, 9.60% of titanium and 89.44% of aluminum.
Further, the paint comprises the following components in percentage by weight: 0.70 percent of beryllium, 2.70 percent of cobalt, 2.40 percent of nickel, 0.50 percent of rare earth silicon aluminum alloy, less than 0.05 percent of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 1.04% of rare earth lanthanum, 0.04% of silicon, 10.60% of titanium and 88.32% of aluminum.
Further, the composite material comprises the following components in percentage by weight: 0.55 percent of beryllium, 2.55 percent of cobalt, 2.10 percent of nickel, 0.40 percent of rare earth silicon aluminum alloy, less than 0.05 percent of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.99% of rare earth lanthanum, 0.03% of silicon, 10.10% of titanium and 88.88% of aluminum.
A processing technology of a high-strength extra-high voltage spring contact finger comprises the following specific processing steps:
the method comprises the following steps: weighing rare earth lanthanum, silicon, titanium and aluminum in the raw materials of beryllium, cobalt, nickel, copper and rare earth silicon-aluminum alloy according to the weight parts;
step two: vacuum smelting beryllium, cobalt, nickel and copper in the step one, then adding the rare earth silicon-aluminum alloy in the step one, melting and blending, keeping the temperature for 60-90 minutes, casting and annealing to prepare a spring contact finger bar;
step three: performing multiple drawing and stress relief annealing treatment on the spring contact finger bar material prepared in the step two to obtain a wire rod, wherein the diameter of the wire rod is 1.2-1.5 mm;
step four: performing spring winding processing on the wire rod prepared in the third step by using a spring winding machine to obtain an open semi-finished product inclined coil spring;
step five: and D, butt welding the inclined ring spring of the semi-finished product of the opening prepared in the fourth step to obtain the high-strength extra-high voltage spring contact finger.
Further, in the second step, the vacuum degree of vacuum melting is 5.8-6.4 × 10 -2 Pa, smelting temperature of 1450-1490 ℃, heat preservation temperature of 1640-1680 ℃ and annealing temperature of 880-1000 ℃; in the third step, the pass processing rate of drawing is 15-18%, the stress relief annealing temperature is 540-640 ℃, and the temperature is kept for 80-110 minutes.
Further, in the second step, the vacuum degree of vacuum melting is 5.8X 10 -2 Pa, smelting at 1450 ℃, keeping the temperature at 1640 ℃, and annealing at 880 ℃; in the third step, the pass processing rate of drawing is 15%, the stress relief annealing temperature is 540 ℃, and the temperature is kept for 80 minutes.
Further, in the second step, the degree of vacuum melting was 6.4X 10 -2 Pa, the smelting temperature is 1490 ℃, the heat preservation temperature is controlled at 1680 ℃, and the annealing temperature is 1000 ℃; in the third step, the pass processing rate of drawing is 18%, the stress relief annealing temperature is 640 ℃, and the temperature is kept for 110 minutes.
Further, in the second step, the vacuum degree of vacuum melting is6.1×10 -2 Pa, the smelting temperature is 1470 ℃, the heat preservation temperature is 1660 ℃, and the annealing temperature is 940 ℃; in the third step, the pass processing rate of drawing is 16.5%, the stress relief annealing temperature is 590 ℃, and the temperature is kept for 95 minutes.
The invention has the technical effects and advantages that:
1. the high-strength extra-high voltage spring contact finger processed by the raw material formula can effectively ensure the high strength and the elastic property of the spring contact finger, effectively improve the high strength and the high elasticity of the spring contact finger when used in a high-temperature environment, and ensure the normal use of the spring contact finger in extra-high voltage; the cobalt metal is added into the beryllium copper alloy, so that a metal compound with high melting point and high hardness can be formed, the strength of the copper alloy is improved, the decomposition of a solid solution in the heat treatment process is delayed, and the precipitation hardening effect of the alloy can be improved; the nickel is added, so that the high strength, hardness and wear resistance of the spring contact finger can be effectively improved; the nickel and the silicon can form an intermetallic compound and show dispersed phase precipitation, so that the spring contact finger is strengthened; the rare earth lanthanum can effectively perform deoxidation and desulfurization treatment on the beryllium-copper alloy, and simultaneously refine the tissue structure of the beryllium-copper alloy; titanium and aluminum can form a Ti/Al3Ti metal layered composite material in the beryllium copper alloy, so that the high strength, high modulus and ultrahigh energy absorption protection performance of the beryllium copper alloy can be effectively improved, and the high elastic performance of the spring contact finger can be effectively improved by a Ni3Al phase with high elastic modulus formed by the aluminum and the nickel in the beryllium copper alloy;
2. in the process of processing the high-strength extra-high voltage spring contact finger, in the second step, beryllium, cobalt, nickel and copper are firstly smelted in vacuum, then rare earth silicon-aluminum alloy is added for melting and blending, and heat preservation casting annealing is carried out to prepare the spring contact finger bar material, so that various substances in the raw materials can be effectively processed, free combination of the raw material components is ensured, and the high elastic performance of the spring contact finger bar material can be effectively improved; in the third step, the spring contact finger bar is subjected to multiple drawing and stress relief annealing treatments to prepare a wire; in the fourth step, the wire is wound to form an open semi-finished product of the inclined coil spring; and in the fifth step, butt welding the semi-finished product of the inclined ring spring with the opening to manufacture the high-strength extra-high voltage spring contact finger.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a high-strength extra-high voltage spring contact finger, which comprises the following components in percentage by weight: 0.40% of beryllium, 2.40% of cobalt, 1.80% of nickel, 0.30% of rare earth silicon aluminum alloy, less than 0.05% of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.94% of rare earth lanthanum, 0.02% of silicon, 9.60% of titanium and 89.44% of aluminum;
a processing technology of a high-strength extra-high voltage spring contact finger comprises the following specific processing steps:
the method comprises the following steps: weighing rare earth lanthanum, silicon, titanium and aluminum in beryllium, cobalt, nickel, copper and rare earth silicon-aluminum alloy raw materials according to the weight part ratio;
step two: vacuum smelting beryllium, cobalt, nickel and copper in the step one, then adding the rare earth silicon-aluminum alloy in the step one, melting and blending, keeping the temperature for 60-90 minutes, casting and annealing to prepare a spring contact finger bar;
step three: performing multiple drawing and stress relief annealing treatment on the spring contact finger bar material prepared in the step two to obtain a wire rod, wherein the diameter of the wire rod is 1.2-1.5 mm;
step four: performing spring winding processing on the wire rod prepared in the third step by using a spring winding machine to obtain an open semi-finished product inclined coil spring;
step five: and D, butt welding the inclined ring spring of the semi-finished product of the opening prepared in the fourth step to obtain the high-strength extra-high voltage spring contact finger.
In the second step, the vacuum degree of vacuum melting is 5.8 multiplied by 10 -2 Pa, smelting at 1450 deg.C, maintaining at 1640 deg.C, and annealingThe temperature is 880 ℃; in the third step, the pass processing rate of drawing is 15%, the stress relief annealing temperature is 540 ℃, and the temperature is kept for 80 minutes.
Example 2:
different from the embodiment 1, the material comprises the following components in percentage by weight: 0.70 percent of beryllium, 2.70 percent of cobalt, 2.40 percent of nickel, 0.50 percent of rare earth silicon aluminum alloy, less than 0.05 percent of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 1.04% of rare earth lanthanum, 0.04% of silicon, 10.60% of titanium and 88.32% of aluminum.
Example 3:
different from the examples 1-2, the material comprises the following components in percentage by weight: 0.55 percent of beryllium, 2.55 percent of cobalt, 2.10 percent of nickel, 0.40 percent of rare earth silicon aluminum alloy, less than 0.05 percent of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.99% of rare earth lanthanum, 0.03% of silicon, 10.10% of titanium and 88.88% of aluminum.
Taking the high-strength extra-high voltage spring contact fingers prepared in the embodiments 1-3 and the high-strength extra-high voltage spring contact fingers of the first comparison group, the second comparison group, the third comparison group, the fourth comparison group and the fifth comparison group respectively, wherein the high-strength extra-high voltage spring contact fingers of the first comparison group have no nickel compared with the three phases of the embodiments, the second comparison group has no rare earth lanthanum compared with the three phases of the embodiments, the third comparison group has no silicon compared with the three phases of the embodiments, the fourth comparison group has no titanium compared with the three phases of the embodiments, the fifth comparison group has no aluminum compared with the three phases of the embodiments, eight groups respectively test the high-strength extra-high voltage spring contact fingers processed in the three embodiments and the five comparison groups, and each 30 samples are taken as one group for testing, and the test results are shown in the table one:
table one:
as can be seen from the table I, when the high-strength extra-high voltage spring contact finger comprises the following raw materials in parts by weight: beryllium 0.55%, cobalt 2.55%, nickel 2.10%, rare earth silicon aluminum alloy 0.40%, total impurities less than 0.05%, and copper in balance; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.99% of rare earth lanthanum, 0.03% of silicon, 10.10% of titanium and 88.88% of aluminum, the high strength and the elastic performance of the spring contact finger can be effectively ensured, the high strength and the high elasticity of the spring contact finger in a high-temperature environment can be effectively improved, and the normal use of the spring contact finger in extra-high voltage is ensured; therefore, the embodiment 3 is a preferred embodiment of the present invention, and cobalt metal is added to beryllium copper alloy, so as to form a metal compound with high melting point and high hardness, improve the strength of the copper alloy, delay the decomposition of solid solution in the heat treatment process, and improve the precipitation hardening effect of the alloy; the high strength, hardness and wear resistance of the spring contact finger can be effectively improved by adding nickel; the nickel and the silicon can form intermetallic compounds and show dispersed phase precipitation, so that the spring contact finger is strengthened; the rare earth lanthanum can effectively perform deoxidation and desulfurization treatment on the beryllium copper alloy, can effectively purify the beryllium copper alloy, and simultaneously refines the tissue structure of the beryllium copper alloy; titanium and aluminum can form a Ti/Al3Ti metal layered composite material in the beryllium copper alloy, the high strength, the high modulus and the ultrahigh energy absorption protection performance of the beryllium copper alloy can be effectively improved, and Ni3Al phase with high elastic modulus formed by the aluminum and the nickel in the beryllium copper alloy can effectively improve the high elastic performance of the spring contact finger.
Example 4
In the preferred technical scheme, the invention provides a high-strength extra-high voltage spring contact finger, which comprises 0.55% of beryllium, 2.55% of cobalt, 2.10% of nickel, 0.40% of rare earth silicon-aluminum alloy, less than 0.05% of the total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.99% of rare earth lanthanum, 0.03% of silicon, 10.10% of titanium and 88.88% of aluminum.
A processing technology of a high-strength extra-high voltage spring contact finger comprises the following specific processing steps:
the method comprises the following steps: weighing rare earth lanthanum, silicon, titanium and aluminum in the raw materials of beryllium, cobalt, nickel, copper and rare earth silicon-aluminum alloy according to the weight parts;
step two: vacuum smelting beryllium, cobalt, nickel and copper in the step one, then adding the rare earth silicon-aluminum alloy in the step one, melting and blending, keeping the temperature for 60-90 minutes, casting and annealing to prepare a spring contact finger bar;
step three: performing multiple drawing and stress relief annealing treatment on the spring contact finger bar material prepared in the step two to obtain a wire rod, wherein the diameter of the wire rod is 1.2-1.5 mm;
step four: performing spring winding processing on the wire rod prepared in the third step by using a spring winding machine to obtain an open semi-finished product inclined coil spring;
step five: and D, butt welding the inclined ring spring of the semi-finished product of the opening prepared in the fourth step to obtain the high-strength extra-high voltage spring contact finger.
In the second step, the vacuum degree of vacuum melting is 5.8 multiplied by 10 -2 Pa, the smelting temperature is 1450 ℃, the heat preservation temperature is controlled to be 1640 ℃, and the annealing temperature is 880 ℃; in the third step, the pass processing rate of drawing is 15%, the stress relief annealing temperature is 540 ℃, and the temperature is kept for 80 minutes.
Unlike example 4, in the second step, the degree of vacuum melting was 6.4X 10 -2 Pa, the smelting temperature is 1490 ℃, the heat preservation temperature is controlled at 1680 ℃, and the annealing temperature is 1000 ℃; in the third step, the pass processing rate of drawing is 18 percent, the stress relief annealing temperature is 640 ℃, and the temperature is kept for 110 minutes.
Example 6
Unlike examples 4 to 5, in the second step, the degree of vacuum melting was 6.1X 10 -2 Pa, the smelting temperature is 1470 ℃, the heat preservation temperature is 1660 ℃, and the annealing temperature is 940 ℃; in the third step, the pass processing rate of drawing is 16.5%, the stress relief annealing temperature is 590 ℃, and the temperature is kept for 95 minutes.
The high-strength extra-high voltage spring contact fingers prepared in the embodiments 4 to 6 are respectively taken to be tested with the high-strength extra-high voltage spring contact fingers of the comparison group six and the high-strength extra-high voltage spring contact fingers of the comparison group seven, the high-strength extra-high voltage spring contact fingers of the comparison group six do not have the operation in the step two compared with the embodiment six, and the high-strength extra-high voltage spring contact fingers of the comparison group seven do not have the operation in the step three compared with the embodiment six; the high-strength extra-high voltage spring contact fingers processed in the three embodiments and the high-strength extra-high voltage spring contact fingers of the two comparison groups are respectively tested in five groups, every 30 samples are taken as one group for testing, and the test results are shown in the table two:
table two:
as can be seen from table two, in the process of processing the high-strength ultra-high voltage spring contact finger, the processing technology in the sixth embodiment is the preferred scheme of the invention, in the second step, beryllium, cobalt, nickel and copper are firstly melted in vacuum, then rare earth silicon-aluminum alloy is added for melt blending, heat preservation casting annealing is carried out, the spring contact finger bar is prepared, various substances in the raw materials can be effectively processed, free compound combination among the raw material components is ensured, nickel and silicon can quickly form intermetallic compounds, the spring contact finger bar is strengthened, titanium and aluminum can quickly form a Ti/Al3Ti metal layered composite material, the high strength, high modulus, energy absorption and ultra-high protection performance of the spring contact finger bar can be effectively improved, aluminum and nickel can quickly form a Ni3Al phase with high elastic modulus, and the high elastic performance of the spring contact finger bar can be effectively improved; in the third step, the spring contact finger bar is subjected to multiple drawing and stress relief annealing treatments to prepare a wire; in the fourth step, the wire is wound to form an open semi-finished product inclined coil spring; and in the fifth step, butt welding is carried out on the inclined ring spring of the semi-finished product of the opening, and the high-strength extra-high voltage spring contact finger is manufactured.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a high strength extra-high voltage spring touches and indicates which characterized in that: the weight percentage of the components is as follows: 0.40 to 0.70 percent of beryllium, 2.40 to 2.70 percent of cobalt, 1.80 to 2.40 percent of nickel, 0.30 to 0.50 percent of rare earth silicon aluminum alloy, less than 0.05 percent of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.94 to 1.04 percent of rare earth lanthanum, 0.02 to 0.04 percent of silicon, 9.60 to 10.60 percent of titanium and the balance of aluminum; the processing technology of the high-strength extra-high voltage spring contact finger comprises the following specific processing steps:
the method comprises the following steps: weighing rare earth lanthanum, silicon, titanium and aluminum in the raw materials of beryllium, cobalt, nickel, copper and rare earth silicon-aluminum alloy according to the weight parts;
step two: vacuum smelting beryllium, cobalt, nickel and copper in the step one, then adding the rare earth silicon-aluminum alloy in the step one, melting and blending, keeping the temperature for 60-90 minutes, casting and annealing to prepare a spring contact finger bar; the vacuum degree of vacuum melting is 5.8-6.4 multiplied by 10 -2 Pa, smelting temperature of 1450-1490 ℃, heat preservation temperature of 1640-1680 ℃ and annealing temperature of 880-1000 ℃;
step three: performing multiple drawing and stress relief annealing treatment on the spring contact finger bar material prepared in the second step to obtain a wire rod, wherein the diameter of the wire rod is 1.2-1.5 mm; the processing rate of drawing passes is 15-18%, the stress-relief annealing temperature is 540-640 ℃, and the temperature is kept for 80-110 minutes;
step four: performing spring winding processing on the wire rod prepared in the third step by using a spring winding machine to obtain an open semi-finished product inclined coil spring;
step five: and D, butt welding the inclined ring spring of the semi-finished product of the opening prepared in the fourth step to obtain the high-strength extra-high voltage spring contact finger.
2. The high-strength extra-high voltage spring contact finger of claim 1, characterized in that: the weight percentage of the components is as follows: beryllium 0.40%, cobalt 2.40%, nickel 1.80%, rare earth silicon-aluminum alloy 0.30%, total impurities less than 0.05%, and copper in balance; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.94% of rare earth lanthanum, 0.02% of silicon, 9.60% of titanium and 89.44% of aluminum.
3. The high-strength extra-high voltage spring contact finger of claim 1, characterized in that: comprises the following components in percentage by weight: beryllium 0.70%, cobalt 2.70%, nickel 2.40%, rare earth silicon aluminum alloy 0.50%, total impurities less than 0.05%, and copper in balance; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 1.04% of rare earth lanthanum, 0.04% of silicon, 10.60% of titanium and 88.32% of aluminum.
4. The high-strength extra-high voltage spring contact finger of claim 1, characterized in that: the weight percentage of the components is as follows: 0.55 percent of beryllium, 2.55 percent of cobalt, 2.10 percent of nickel, 0.40 percent of rare earth silicon aluminum alloy, less than 0.05 percent of total impurities and the balance of copper; the rare earth silicon-aluminum alloy comprises the following components in percentage by weight: 0.99% of rare earth lanthanum, 0.03% of silicon, 10.10% of titanium and 88.88% of aluminum.
5. The high-strength extra-high voltage spring contact finger as claimed in claim 1, wherein: in step two, vacuum meltingThe vacuum degree is 5.8 multiplied by 10 -2 Pa, smelting at 1450 ℃, keeping the temperature at 1640 ℃, and annealing at 880 ℃; in the third step, the pass processing rate of drawing is 15%, the stress relief annealing temperature is 540 ℃, and the temperature is kept for 80 minutes.
6. The high-strength extra-high voltage spring contact finger as claimed in claim 1, wherein: in the second step, the vacuum degree of vacuum melting is 6.4 multiplied by 10 -2 Pa, the smelting temperature is 1490 ℃, the heat preservation temperature is controlled at 1680 ℃, and the annealing temperature is 1000 ℃; in the third step, the pass processing rate of drawing is 18%, the stress relief annealing temperature is 640 ℃, and the temperature is kept for 110 minutes.
7. The high-strength extra-high voltage spring contact finger as claimed in claim 1, wherein: in the second step, the vacuum degree of vacuum melting is 6.1X 10 -2 Pa, the smelting temperature is 1470 ℃, the heat preservation temperature is 1660 ℃, and the annealing temperature is 940 ℃; in the third step, the pass processing rate of drawing is 16.5%, the stress relief annealing temperature is 590 ℃, and the temperature is kept for 95 minutes.
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| CN202111114380.8A CN113862509B (en) | 2021-09-23 | 2021-09-23 | High-strength extra-high voltage spring contact finger and processing technology thereof |
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| CN202111114380.8A CN113862509B (en) | 2021-09-23 | 2021-09-23 | High-strength extra-high voltage spring contact finger and processing technology thereof |
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