CN114614314A - Alloy conducting ring and preparation method thereof - Google Patents

Abstract

The invention provides an alloy conducting ring, which comprises 20-21 wt% of copper Cu, 1-2 wt% of nickel Ni, 0.1-1 wt% of bismuth Bi and the balance of Ag. The alloy conducting ring has the advantages of high hardness, good wear resistance and stable quality.

Description

Alloy conductive ring and preparation method thereof

technical field

The invention relates to the technical field of non-ferrous metal alloys, in particular to a silver-copper-nickel-bismuth alloy conductive ring and a preparation method thereof.

Background technique

The rotating part of the radar antenna base has various driving elements, measuring elements and control elements, while the power supply and control cabinet are fixed, so a rotating connection device is required to transmit signals or power between the relatively rotating parts.

Conductive ring, also known as conductive slip ring, collector ring, collector ring, etc., is a precision power transmission device that realizes the image, data signal and power transmission of two relative rotating mechanisms. It is especially suitable for applications with unlimited continuous rotation requirements. Locations where power or data needs to be transferred from a fixed location to a rotating location. The conductive ring needs to transmit low-level signals, medium and high-frequency signals and currents as large as several hundred amperes. Therefore, its performance directly affects the stability and reliability of signal and current transmission.

The conductive ring includes two parts, a brush and a ring-shaped conductive part, and through the cooperation of the two parts, the electrical signal or current on the stationary equipment is transmitted to the rotating equipment. Currently, the European Space Cooperation Organization for Standardization (ECSS) standard requires an effective operating distance of 56,000 revolutions for the conductive ring. In China, when designing spacecraft, the Aerospace Science and Technology Corporation has significantly increased its on-orbit service design life, and the number of on-orbit rotation cycles has also increased from tens of thousands of cycles to millions of cycles. Conductive rings with large diameter, high hardness, good wear resistance and stable quality have become an inevitable trend in the development of the industry.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a silver-copper-nickel-bismuth alloy conductive ring, which has the advantages of high hardness, good wear resistance and stable quality.

In order to solve the above technical problems, the present invention provides an alloy conductive ring, the alloy composition of which is copper Cu 20-21 wt %, nickel Ni 1-2 wt %, bismuth Bi 0.1-1 wt %, and the balance Ag.

Wherein, the thickness of the conductive ring is 2-5 mm, and the inner diameter is 190-205 mm.

The present invention also provides a method for making the above-mentioned silver-copper-nickel-bismuth alloy conductive ring, comprising:

The first step is to smelt silver, copper, nickel, and bismuth materials in a vacuum intermediate frequency furnace to obtain an ingot;

In the second step, the ingot is subjected to homogenization heat treatment;

The third step is to forge the product obtained in the second step;

In the fourth step, the product obtained in the third step is subjected to hole reaming treatment;

In the fifth step, the product obtained in the fourth step is subjected to ring forging treatment to make a tube blank;

The sixth step is to spin the tube blank;

In the seventh step, the product obtained in the sixth step is subjected to heat treatment to make an alloy tube;

The eighth step is to cut as needed.

Wherein, the annealing temperature of the homogenization heat treatment in the second step is 700° C.˜800° C., and the holding time is 100-200 min.

Wherein, in the third step, the initial forging temperature of the blank is 700°C to 800°C, the final forging temperature is 550°C to 650°C, and the initial forging temperature of the remaining fires is 650°C to 700°C, and the final forging temperature is 650°C to 700°C. is 600°C.

Wherein, in the fourth step, the hole expanding temperature is 640℃～720℃, and the diameter of the hole expanding die used is

Wherein, in the fifth step, the ring forging temperature is 640-720°C, and the final forging temperature is 560-590°C.

Wherein, in the sixth step, the heat treatment temperature of the spinning process is 550-600°C.

Wherein, in the sixth step, the deformation amount of the spinning process is 10%-30%, and the total deformation amount is 40-70%.

The beneficial effects of the present invention

The conductive ring provided by the invention improves the wear resistance of the alloy by adding bismuth element, and the resistivity meets the requirements, saves the production cost, and satisfies the use of the conductive ring.

Detailed ways

The invention provides an alloy conductive ring, the alloy composition of which is copper Cu 20-21wt%, nickel Ni 1-2wt%, bismuth Bi 0.1-1wt%, and the balance Ag.

Wherein, the thickness of the conductive ring is 2-5 mm, preferably 2-4 mm, and the inner diameter is 190-205 mm, preferably 192-198 mm.

The alloy conductive ring improves the wear resistance of the alloy by adding bismuth element, and the electrical resistivity meets the requirements, saves the production cost, and satisfies the use of the conductive ring.

The present invention also provides a method for making the above-mentioned silver-copper-nickel-bismuth alloy conductive ring, comprising:

The first step is to smelt silver, copper, nickel, and bismuth materials in a vacuum intermediate frequency furnace to obtain an ingot;

In the second step, the ingot is subjected to homogenization heat treatment;

The third step is to forge the product obtained in the second step;

In the fourth step, the product obtained in the third step is subjected to hole reaming treatment;

In the fifth step, the product obtained in the fourth step is subjected to ring forging treatment to make a tube blank;

The sixth step is to spin the tube blank;

In the seventh step, the product obtained in the sixth step is subjected to heat treatment to make an alloy tube;

The eighth step is to cut as needed.

Wherein, the annealing temperature of the homogenization heat treatment in the second step is 700° C.˜800° C., and the holding time is 100-200 min.

Wherein, in the third step, the initial forging temperature of the blank is 700°C to 800°C, the final forging temperature is 550°C to 650°C, and the initial forging temperature of the remaining fires is 650°C to 700°C, and the final forging temperature is 650°C to 700°C. is 600°C.

Wherein, in the fourth step, the hole expanding temperature is 640℃～720℃, and the diameter of the hole expanding die used is

Wherein, in the fifth step, the ring forging temperature is 640°C to 720°C, and the final forging temperature is preferably 560°C to 590°C. The mandrel diameter is 85mm.

Wherein, in the sixth step, the heat treatment temperature of the spinning process is 550-600°C.

Wherein, in the sixth step, the deformation amount of the spinning process is 10%-30%, preferably 10%-20%, and the total deformation amount is 40-70%.

Embodiments of the present invention are described in detail below by using examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve technical effects in the present invention.

Example 1

圆锭。将铸锭在700℃均匀化热处理。热处理后的铸锭开坯锻造温度为750℃，终锻温度为600℃，其余火次锻造温度为670℃，终锻温度600℃，铸锭进行两次镦粗，滚圆，最终锻至高度150mm。AgCuNiBi's silver-copper-nickel alloy is prepared according to the requirements of the AgCuNiBia alloy composition. It adopts a split pure copper mold and is smelted in a vacuum intermediate frequency furnace.

round ingot. The ingot was homogenized and heat-treated at 700°C. The forging temperature of the ingot after heat treatment is 750°C, the final forging temperature is 600°C, the other forging temperature is 670°C, and the final forging temperature is 600°C. .

的带锥度冲孔模具对镦粗后的铸锭进行冲孔，上下两次完成冲孔，然后依次采用

的带锥度模具进行扩孔，扩孔温度650℃。use

The taper punching die punches the upsetting ingot, completes the punching twice up and down, and then uses

The taper mold is expanded, and the expansion temperature is 650 ℃.

The ring blank is worn on a mandrel with a diameter of 85 mm for ring forging, and the deformation amount of each pass is 30%. After each pass of forging, it is returned to the furnace for annealing. Ring forging temperature is 650 ℃, when it is lower than 600 ℃, it is returned to furnace for annealing. Annealing process: 650 ℃ for 30 minutes.

The billet spinning adopts low-strain billet spinning, the diameter of the mandrel is 195.8mm, and the deformation amount of each pass is 10%. After every two passes of spinning, annealing treatment and then spinning, the cumulative deformation amount is 55%, and the annealing heat treatment The temperature is 550℃/1h, and the inner diameter is 196mm and the outer diameter is 203mm.

Remove the excess pressure of the alloy tube after spinning, and cut it according to the length of 240mm to make a confluence ring tube. The ellipticity of the silver-copper-nickel alloy ring prepared by the director is less than 0.5mm, the non-straightness is less than 0.1mm, the microhardness is more than 150HV, and the resistivity is 2.7μΩ·cm, which meets the requirements of the radar system for the bus ring.

The silver-copper-nickel-bismuth alloy bus ring is prepared by the method shown in the above implementation of the present invention, and compared with the original silver-copper-nickel alloy bus ring, as shown in Table 1, the wear resistance is significantly improved. Increase the use time of the conductive ring, reduce the use of precious metal silver by increasing the content of bismuth element, and save the cost of raw materials.

Table 1

Relative wear rate (W) silver copper nickel 0.07-0.15 Silver Copper Nickel Aluminum 0.05-0.10

All of the aforementioned primary implementations of this intellectual property do not set limits to other forms of implementation of this new product and/or new method. Those skilled in the art will use this important information to modify the above to achieve a similar implementation. However, all modifications or alterations to new products based on the present invention are reserved.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications to equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the protection scope of the technical solutions of the present invention.

Claims (9)

1. An alloy conductive ring, characterized in that: the alloy composition is that copper Cu is 20-21 wt %, nickel Ni is 1-2 wt %, bismuth Bi is 0.1-1 wt %, and the balance is Ag. 2 . The alloy conductive ring according to claim 1 , wherein the conductive ring has a thickness of 2-5 mm and an inner diameter of 190-205 mm. 3 . 3. the manufacture method of the described alloy conductive ring of claim 1 or 2, is characterized in that, comprises: The first step is to smelt silver, copper, nickel, and bismuth materials in a vacuum intermediate frequency furnace to obtain an ingot; In the second step, the ingot is subjected to homogenization heat treatment; The third step is to forge the product obtained in the second step; In the fourth step, the product obtained in the third step is subjected to hole reaming treatment; In the fifth step, the product obtained in the fourth step is subjected to ring forging treatment to make a tube blank; The sixth step is to spin the tube blank; In the seventh step, the product obtained in the sixth step is subjected to heat treatment to make an alloy tube; The eighth step is to cut as needed. 4 . The method for manufacturing an alloy conductive ring according to claim 3 , wherein the annealing temperature of the homogenizing heat treatment in the second step is 700° C. to 800° C., and the holding time is 100-200 min. 5 . 5. The method for making an alloy conductive ring according to claim 3 or 4, wherein in the third step, the initial forging temperature of the blank is 700°C to 800°C, and the final forging temperature is 550°C to 550°C. 650°C, the initial forging temperature of the remaining fires is 650-700°C, and the final forging temperature is 600°C. 6. The method for making an alloy conductive ring according to claim 3 or 4, wherein in the fourth step, the hole expanding temperature is 640°C to 720°C, and the diameter of the hole expanding die used is

7 . The method for manufacturing an alloy conductive ring according to claim 3 , wherein in the fifth step, the ring forging temperature is 640°C to 720°C, and the final forging temperature is 560°C to 590°C. 8 . 8 . The manufacturing method of the alloy conductive ring according to claim 3 or 4 , wherein in the sixth step, the heat treatment temperature of the spinning process is 550-600° C. 9 . 9. The manufacturing method of the alloy conductive ring according to claim 3 or 4, wherein in the sixth step, the deformation amount of the spinning process is 10% to 30%, and the total deformation amount is 40%. ~70%.