Preparation method of composite beryllium-copper alloy wire through spray co-deposition rolling
The composite beryllium copper alloy wire was prepared by adding TiB2 particles through jet co-deposition rolling, which solved the problem of insufficient softening and stress relaxation ability of traditional beryllium copper materials at high temperatures, and achieved significant improvement in the high-temperature softening and stress relaxation resistance of the material.
Patent Information
- Application Number
- CN202411952193.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-03-25
AI Technical Summary
Traditional beryllium copper materials have insufficient softening and stress relaxation capabilities at high temperatures, which affects the safety and performance of the material.
The spray co-deposition rolling method is used to add hard phase TiB2 particles, and the composite beryllium copper alloy wire is prepared by spray co-deposition rolling method, which regulates the grain size and improves the high-temperature softening temperature and stress relaxation resistance.
It significantly improves the high-temperature softening temperature and stress relaxation resistance of beryllium copper alloy, enhances the strength and wear resistance of the material, while reducing process flow and reducing production costs.
Smart Images
Figure CN119685650A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of metal material processing, in particular to a method for preparing a composite beryllium-copper alloy wire by spraying and co-deposition rolling. Background Art
[0002] Beryllium copper alloy has high strength, hardness and elastic limit, small elastic hysteresis, good stability, fatigue resistance, corrosion resistance, wear resistance, low temperature resistance, non-magnetic, high electrical and thermal conductivity, no sparks when impacted, and a series of excellent comprehensive properties. It is widely used in aerospace, electronic communications, instrumentation, light industry, machinery, chemical industry, coal and other fields. With the development of aerospace, electronic communications and other industries, higher requirements are put forward for the performance of elastic copper alloy materials. Traditional beryllium copper materials have the disadvantages of low resistance to high temperature softening and low resistance to stress relaxation, which seriously affects the safety of material use. In order to solve the problems of low resistance to high temperature softening and low resistance to stress relaxation. Summary of the invention
[0003] In view of the deficiencies in the prior art, the present invention provides a method for preparing a composite beryllium-copper alloy wire by spray codeposition rolling.
[0004] To achieve the above object, the present invention provides the following technical solution: a method for preparing a composite beryllium copper alloy wire by spray codeposition rolling, comprising the following steps: (1) Spray co-deposition rolling: Beryllium and copper with a good ratio are melted and TiB2 particles are sprayed, and then a deposition layer is obtained in the groove of the rolling mill roller, and then continuous rolling is performed to obtain the beryllium copper alloy wire billet; (2) Stretching: subjecting the beryllium copper alloy wire blank in (1) to a solid solution heat treatment and repeatedly drawing to obtain a wire blank; (3) Multi-mode high-precision stretching: The wire blank in (2) is subjected to multi-mode high-precision stretching in multiple sets of stretching dies to obtain a wire blank; (4) Continuous annealing: The wire blank in (3) is subjected to solution treatment and then continuously annealed to obtain beryllium copper microwires.
[0005] Preferably, the particle size of the sprayed TiB2 particles is 500-800 nm.
[0006] Preferably, the mass percentage of beryllium in (1) is 1.8-2.0%, and the balance is copper. After the raw materials are melted and allowed to stand, the impurity content is controlled to be below 0.06% through degassing and impurity removal processes.
[0007] Preferably, before starting smelting in (1), inert gas argon is introduced to ensure that the argon completely fills the atomizing chamber.
[0008] Preferably, the smelting temperature in (1) is 1100-1300°C, the relative air flow velocity of the TiB2 particles is 50-200 m / s, and the horizontal incident angle is 45-60°.
[0009] Preferably, after smelting in (1), a deposition layer is obtained in the groove of the rolling mill roller, and continuous rolling is performed with a rolling pressure of F=40-60KN and a rolling speed of 10-18m / min to prepare a beryllium copper alloy wire billet of Φ100-200mm.
[0010] Preferably, the specific steps of (2) are: subjecting the beryllium copper alloy wire blank in (1) to a solution heat treatment at a temperature of 780-880°C, followed by water quenching, and then repeatedly drawing for 3-6 times to obtain a wire blank of Φ0.3-0.6 mm.
[0011] Preferably, the specific steps of (3) are as follows: the wire blank in (2) is subjected to multi-mode high-precision stretching in 5-10 sets of stretching dies at a stretching speed of 5-20 m / s to obtain a wire blank of Φ0.03-0.075 mm.
[0012] Preferably, the specific steps of (4) are: subjecting the wire blank in (3) to a solution treatment at a temperature of 800-900°C, then aging at 350°C for 2h, and continuously annealing at 800°C, to finally obtain beryllium copper microwires of Φ0.03-0.075mm.
[0013] Compared with the prior art, the present invention provides a method for preparing a composite beryllium copper alloy wire by spray codeposition rolling, which has the following beneficial effects: 1. The preparation method of the composite beryllium copper alloy wire material by spray co-deposition rolling adds hard phase TiB2, regulates the grain size, improves the high temperature softening temperature and stress relaxation resistance, and adds TiB2 powder with a size of 500-800nm by spray co-deposition. Since TiB2 is a high temperature resistant ceramic particle, it can enhance the phase thermodynamic stability, thereby improving the high temperature softening temperature of the beryllium copper alloy. TiB2 as a nucleation particle can generate fine and uniformly dispersed grains, increase grain boundaries, hinder the movement and slip of dislocations, and further improve the stress relaxation resistance of the beryllium copper alloy.
[0014] 2. The preparation method of the spray co-deposition rolled composite beryllium copper alloy wire has high strength and wear resistance and good comprehensive performance. Since the TiB2 particles have high hardness and high thermal conductivity, the strength and thermal conductivity of the beryllium copper alloy are directly improved. At the same time, because the added TiB2 particles have the effect of fine grain strengthening, the grain size is greatly reduced, and the strength and wear resistance of the beryllium copper alloy are increased. The TiB2 particle-reinforced metal matrix composite material prepared by spray deposition has uniform distribution of particle reinforcement phase, low oxygen content and inclusion contamination, and good comprehensive performance.
[0015] 3. The preparation method of the spray co-deposition rolling composite beryllium copper alloy wire reduces the process flow and saves production costs. The material is directly formed into a wire billet of Φ100~200mm through the spray co-deposition rolling method, which reduces the process flow, omits the transportation, rolling, sintering and other processes, and greatly saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the process flow of the present invention; Figure 2 It is a schematic diagram of the spray codeposition rolling principle of the present invention.
[0017] In the figure, 1 is an induction coil, 2 is a molten alloy, 3 is a crucible, 4 is a first nozzle, 5 is a second nozzle, 6 is TiB2 particles, 7 is a rolling roller, and 8 is a deposition layer. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] See Figure 2 : The present invention uses an induction coil 1 to melt the alloy by electromagnetic heating. The molten alloy 2 is melted in the crucible 3 and then ejected through the first nozzle 4. At the same time, the second nozzle 5 ejects TiB2 particles 6. The raw materials are mixed and deposited on the roller 7 through the first nozzle 4 and the second nozzle 5 to form a deposition layer 8. The innovation of the present invention mainly lies in the addition of TiB2 particles. The above-mentioned device is set to realize the process of this application.
[0020] Comparative Example: (1) Spray co-deposition rolling The proportioned molten alloy is placed in a crucible, in which the mass percentage of beryllium is 1.8% and the balance is copper. After the raw materials are melted, they are allowed to stand for 30 minutes. After degassing and impurity removal, the impurity content is controlled below 0.06%. Before starting smelting, inert gas argon (gas purity is 99.5%) is introduced for 10 minutes to ensure that the argon completely fills the atomization chamber. The smelting temperature is 1150℃. Then, a deposition layer is obtained in the groove of the rolling mill roller, and continuous rolling is carried out. The rolling pressure is F=50KN and the rolling speed is 12m / min. Finally, a Φ160mm beryllium copper alloy wire billet is prepared.
[0021] (2) Stretching The Φ150 mm beryllium copper alloy wire billet in (1) was solution treated at 840°C for 1 h, and then water quenched and repeatedly drawn for 5 times to obtain a Φ0.5 mm wire billet.
[0022] (3) Multi-mode high-precision stretching The Φ0.5 mm wire blank in (2) was subjected to multi-mode high-precision stretching in 6 sets of stretching dies at a stretching speed of 15 m / s to obtain a Φ0.06 mm wire blank.
[0023] (4) Continuous annealing The wire billet in (3) was solution treated at 880°C for 1 h, then heat treated at 350°C for 2 h, and continuously annealed at 800°C to obtain Φ0.06 mm beryllium copper microwires.
[0024] Table 1: Beryllium copper microwire properties without TiB2 particles Softening temperature(℃) Tensile strength(MPa) Stress relaxation at 150℃(%) <![CDATA[Without TiB2]]> 450 1350 7 Embodiment 1:
[0025] (1) Spray co-deposition rolling The proportioned molten alloy is placed in a crucible, in which the mass percentage of beryllium is 1.9% and the balance is copper. After the raw materials are melted, they are allowed to stand for 30 minutes. After degassing and impurity removal, the impurity content is controlled to be below 0.06%. Before starting smelting, inert gas argon (gas purity is 99.5%) is introduced for 10 minutes to ensure that the argon completely fills the atomization chamber. The smelting temperature is 1200℃. During the smelting process, TiB2 particles with a particle size of 500-800nm are added through another nozzle, the relative air flow velocity is 50m / s, and the horizontal incident angle is 45°, so that the mass percentage of TiB2 is 0.2%. Then, a deposition layer is obtained in the groove of the rolling mill roller, and continuous rolling is carried out. The rolling pressure is F=50KN and the rolling speed is 12m / min. Finally, a Φ150mm beryllium copper alloy wire billet is prepared.
[0026] (2) Stretching The Φ160 mm beryllium copper alloy wire billet in (1) was solution treated at 820°C for 1 h, and then water quenched and repeatedly drawn for 6 times to obtain a Φ0.4 mm wire billet.
[0027] (3) Multi-mode high-precision stretching The Φ0.4 mm wire blank in (2) was subjected to multi-mode high-precision stretching in 6 sets of stretching dies at a stretching speed of 10 m / s to obtain a Φ0.04 mm wire blank.
[0028] (4) Continuous annealing The wire billet in (3) was solution treated at 870°C for 1 h, then heat treated at 350°C for 2 h, and continuously annealed at 800°C to obtain Φ0.04 mm beryllium copper microwires.
[0029] Table 2: Properties of BeCu microwires with 0.2% TiB2 particles Softening temperature(℃) Tensile strength(MPa) Stress relaxation at 150℃(%) <![CDATA[Add 2% TiB2]]> 920 1400 5 Embodiment 2:
[0030] (1) Spray co-deposition rolling The proportioned molten alloy is placed in a crucible, in which the mass percentage of beryllium is 2.0% and the balance is copper. After the raw materials are melted, they are allowed to stand for 30 minutes. After degassing and impurity removal, the impurity content is controlled to be below 0.06%. Before starting smelting, inert gas argon (gas purity is 99.5%) is introduced for 10 minutes to ensure that the argon completely fills the atomization chamber. The smelting temperature is 1200℃. During the smelting process, TiB2 particles with a particle size of 500-800nm are added through another nozzle, the relative air flow velocity is 200m / s, and the horizontal incident angle is 60°, so that the mass percentage of TiB2 is 0.8%. Then, a deposition layer is obtained in the groove of the rolling mill roller, and continuous rolling is carried out. The rolling pressure is F=50KN and the rolling speed is 12m / min. Finally, a Φ140mm beryllium copper alloy wire billet is prepared.
[0031] (2) Stretching The Φ140 mm beryllium copper alloy wire billet in (1) was solution treated at 850°C for 1 h, and then water quenched and repeatedly drawn for 5 times to obtain a Φ0.3 mm wire billet.
[0032] (3) Multi-mode high-precision stretching The Φ0.3 mm wire blank in (2) is subjected to multi-mode high-precision stretching in 7 sets of stretching dies at a stretching speed of 8 m / s to obtain a Φ0.03 mm wire blank.
[0033] (4) Continuous annealing The wire billet in (3) was solution treated at 900°C for 1 h, then heat treated at 350°C for 2 h, and continuously annealed at 800°C to obtain 0.03 mm annealed beryllium copper microwires.
[0034] Table 3: Properties of BeCu microwires with 0.8% TiB2 particles Softening temperature(℃) Tensile strength(MPa) Stress relaxation at 150℃(%) <![CDATA[Add 8% TiB2]]> 950 1460 3.5 It can be concluded from the performance of the comparative example, Example 1 and Example 2 that the performance of the beryllium copper alloy is effectively improved after adding TiB2 in the present application.
[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A method for preparing a composite beryllium copper alloy wire by spray codeposition rolling, characterized in that: The following steps are involved: (1) Spray co-deposition rolling: Beryllium and copper with a good ratio are melted and TiB2 particles are sprayed, and then a deposition layer is obtained in the groove of the rolling mill roller, and then continuous rolling is performed to obtain a beryllium copper alloy wire billet; (2) Stretching: subjecting the beryllium copper alloy wire blank in (1) to a solid solution heat treatment and repeatedly drawing to obtain a wire blank; (3) Multi-mode high-precision stretching: The wire blank in (2) is subjected to multi-mode high-precision stretching in multiple sets of stretching dies to obtain a wire blank; (4) Continuous annealing: The wire blank in (3) is subjected to solution treatment and then continuously annealed to obtain beryllium copper microwires.
2. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: The particle size of the sprayed TiB2 particles is 500-800nm.
3. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: The mass percentage of beryllium in (1) is 1.8-2.0%, and the balance is copper. After the raw materials are melted and left to stand, the impurity content is controlled to be below 0.06% through the degassing and impurity removal process.
4. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: In said (1), before starting smelting, inert gas argon is introduced to ensure that the argon completely fills the atomizing chamber.
5. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: In the above (1), the melting temperature is 1100-1300°C, the relative air flow velocity of the TiB2 particle injection is 50-200 m / s, and the horizontal incident angle is 45-60°.
6. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: After smelting in the above (1), a deposited layer is obtained in the groove of the rolling mill roller, and continuous rolling is performed at a rolling pressure of F=40-60KN and a rolling speed of 10-18m / min to prepare a beryllium copper alloy wire billet of Φ100-200mm.
7. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: The specific steps of (2) are: subjecting the beryllium copper alloy wire billet in (1) to a solution heat treatment at a temperature of 780-880°C, followed by water quenching, and then repeatedly drawing for 3-6 times to obtain a wire billet of Φ0.3-0.6 mm.
8. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: The specific steps of (3) are as follows: the wire blank in (2) is subjected to multi-mode high-precision stretching in 5-10 sets of stretching dies at a stretching speed of 5-20 m / s to obtain a wire blank of Φ0.03-0.075 mm.
9. The method for preparing a composite beryllium copper alloy wire by spray codeposition rolling according to claim 1, characterized in that: The specific steps of (4) are: subjecting the wire blank in (3) to a solution treatment at a temperature of 800-900°C, then subjecting the wire blank to an aging treatment at 350°C for 2h, and subjecting the wire blank to a continuous annealing treatment at 800°C, and finally obtaining a beryllium copper microwire of Φ0.03-0.075mm.