A copper-containing carbon slide plate and a manufacturing method thereof

Abstract

The present application relates to the field of material processing technology, and more particularly to a copper-containing carbon slide plate and a manufacturing method thereof, the method specifically comprising: placing a copper-containing carbon slide plate preform in a vacuum box furnace, placing the vacuum box furnace on a vibration table, and performing vacuum heat treatment on the copper-containing carbon slide plate preform under vibration conditions to change the distribution state of copper phase in the copper-containing carbon slide plate preform to a network state. By performing vacuum heat treatment on the copper-containing carbon slide plate preform under vibration conditions, the copper will undergo a softening and melting process during the heat treatment process; under vacuum conditions, not only will the melting point of the copper be reduced, but the surface of the molten copper will also swell and protrude; on this basis, mechanical vibration is applied to promote the growth of the protrusions on the surface of the copper, so that the distribution state of the copper phase in the copper-containing carbon slide plate preform changes from filamentous and agglomerated to a network state, thereby significantly improving the uniformity and continuity of the copper phase distribution.

Description

Technical Field

[0001] This invention relates to the field of materials processing technology, specifically to a copper-containing carbon slide plate and its manufacturing method. Background Technology

[0002] Copper-containing carbon sliding plates are an important conductive material widely used in locomotive power supply systems. It is known that the main role of copper in carbon sliding plates is to improve their conductivity, and the uniformity and continuity of the copper phase distribution directly affects the conductivity of the copper-containing carbon sliding plate.

[0003] Currently, the copper phase distribution in copper-containing carbon slide plates prepared by the impregnation and mixing methods is discontinuous, filamentous, or agglomerated, resulting in low and unstable conductivity. The impregnation method involves mixing, shaping, and sintering carbon powder, then immersing it in molten copper to obtain the copper-containing carbon slide plate; the immersion process typically employs pressure treatment. The mixing method involves mixing, shaping, and sintering carbon powder and copper powder to produce the copper-containing carbon slide plate. Summary of the Invention

[0004] The purpose of this invention is to provide a copper-containing carbon slide plate and its manufacturing method, which can improve the uniformity and continuity of the copper phase distribution in the copper-containing carbon slide plate.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a method for manufacturing a copper-carbon sliding plate, the method specifically comprising: placing a copper-carbon sliding plate preform in a vacuum box furnace, the vacuum box furnace being placed on a vibration table, and subjecting the copper-carbon sliding plate preform to vacuum heat treatment under vibration conditions, thereby transforming the distribution state of the copper phase in the copper-carbon sliding plate preform into a network.

[0007] Furthermore, the copper-carbon slide plate preform is prepared by impregnation or mixing.

[0008] Furthermore, the copper mass fraction in the copper-containing carbon slide plate preform is 20-40%.

[0009] Furthermore, the heating temperature for vacuum heat treatment is 1000~1200℃, the holding time is 1~6h, and the vacuum degree is ≤10Pa.

[0010] Furthermore, the vibration mode is mechanical vibration, the vibration frequency is set to 10~50Hz, and the vibration amplitude is set to 0.1~1mm.

[0011] Secondly, the present invention provides a copper-carbon skateboard obtained by the manufacturing method of the copper-carbon skateboard described above.

[0012] The beneficial effects of this invention are:

[0013] This invention involves vacuum heat treatment of copper-carbon sliding plate preforms under vibration conditions. During the heat treatment process, copper undergoes softening and melting. Under vacuum conditions, not only does the melting point of copper decrease, but the surface of the molten copper also expands and protrudes. Applying mechanical vibration on this basis can promote the growth of the protrusions on the copper surface, transforming the distribution state of the copper phase in the copper-carbon sliding plate preform from filamentous and agglomerated to network-like, thereby significantly improving the uniformity and continuity of the copper phase distribution. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the transformation of the copper phase distribution in a copper-carbon slide plate preform during processing using the manufacturing method described in this invention.

[0015] Figure 2 This is a schematic diagram showing the distribution of the copper phase in a copper-containing carbon slide plate preform.

[0016] Figure 3 This is a schematic diagram showing the distribution of the copper phase in a copper-containing carbon slide plate obtained by the manufacturing method described in this invention. Detailed Implementation

[0017] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0018] Example 1: A method for manufacturing a copper-carbon sliding plate, specifically comprising: placing a copper-carbon sliding plate preform in a vacuum box furnace, which is placed on a vibration table; and performing vacuum heat treatment on the copper-carbon sliding plate preform under vibration conditions to transform the distribution state of the copper phase in the preform into a network. The heating temperature for vacuum heat treatment is 1200℃, the holding time is 1 hour, and the vacuum degree is ≤10Pa. The vibration method is mechanical vibration, with a vibration frequency set to 50Hz and a vibration amplitude set to 0.5mm.

[0019] Furthermore, the copper-containing carbon slide plate preform is prepared by an impregnation method, and the mass fraction of copper in the copper-containing carbon slide plate preform is 20-40%. See also... Figure 2 As shown, the copper phase in the copper-carbon slide plate preform is distributed in a filamentous and agglomerated state. (See also...) Figure 3 As shown, the copper phase in the copper-containing carbon slide plate prepared by the manufacturing method of the present invention is distributed in a network state.

[0020] Generally, the copper in copper-carbon sliding plates is pure copper, which has a melting point of approximately 1083.4℃. (See also...) Figure 1 As shown, this invention involves vacuum heat treatment of copper-carbon sliding plate preforms under vibration conditions. When the heat treatment temperature reaches 1000~1200℃, copper undergoes a softening and melting process. Under vacuum conditions, not only does the melting point of copper decrease, but the surface of the molten copper also expands and protrudes. Based on this, applying mechanical vibration of a specific frequency and amplitude can promote the growth of protrusions on the copper surface, transforming the distribution state of the copper phase in the copper-carbon sliding plate preform from filamentous and agglomerated to network-like, thereby significantly improving the uniformity and continuity of the copper phase distribution.

[0021] Example 2: A method for manufacturing a copper-carbon sliding plate. The method specifically involves placing a copper-carbon sliding plate preform in a vacuum box furnace, which is then placed on a vibration table. The preform is subjected to vacuum heat treatment under vibration conditions, transforming the copper phase distribution in the preform into a network structure. The vacuum heat treatment temperature is 1000℃, the holding time is 3 hours, and the vacuum degree is ≤10Pa. The vibration method is mechanical vibration, with a vibration frequency of 30Hz and a vibration amplitude of 0.1mm. The microstructure of the resulting copper-carbon sliding plate is observed, revealing a network-like distribution of the copper phase.

[0022] Example 3: A method for manufacturing a copper-carbon sliding plate. The method specifically involves placing a copper-carbon sliding plate preform in a vacuum box furnace, which is then placed on a vibration table. The preform is subjected to vacuum heat treatment under vibration conditions, transforming the copper phase distribution in the preform into a network structure. The heating temperature for the vacuum heat treatment is 1100℃, the holding time is 6 hours, and the vacuum degree is ≤10Pa. The vibration method is mechanical vibration, with a vibration frequency set to 10Hz and a vibration amplitude set to 1mm. The microstructure of the resulting copper-carbon sliding plate is observed, revealing a network-like distribution of the copper phase.

[0023] Example 4: A method for manufacturing a copper-carbon sliding plate. The method specifically involves placing a copper-carbon sliding plate preform in a vacuum box furnace, which is then placed on a vibration table. The preform is subjected to vacuum heat treatment under vibration conditions, transforming the copper phase distribution in the preform into a network structure. The heating temperature for the vacuum heat treatment is 1150℃, the holding time is 2 hours, and the vacuum degree is ≤10Pa. The vibration method is mechanical vibration, with a vibration frequency set to 10Hz and a vibration amplitude set to 1mm. The microstructure of the resulting copper-carbon sliding plate is observed, revealing a network-like distribution of the copper phase.

[0024] Example 5: A method for manufacturing a copper-carbon sliding plate. The method specifically involves placing a copper-carbon sliding plate preform in a vacuum box furnace, which is then placed on a vibration table. The preform is subjected to vacuum heat treatment under vibration conditions, transforming the copper phase distribution in the preform into a network structure. The heating temperature for the vacuum heat treatment is 1100℃, the holding time is 4 hours, and the vacuum degree is ≤10Pa. The vibration method is mechanical vibration, with a vibration frequency set to 40Hz and a vibration amplitude set to 0.5mm. The microstructure of the resulting copper-carbon sliding plate is observed, revealing a network-like distribution of the copper phase.

[0025] The above embodiments are merely preferred embodiments listed to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A method of manufacturing a copper-containing carbon slide plate, characterized by: Copper-containing carbon slide plate preforms prepared by impregnation or mixing methods are placed in a vacuum box furnace. The copper mass fraction in the copper-containing carbon slide plate preforms is 20-40%. The vacuum box furnace is placed on a vibration table, and the copper-containing carbon slide plate preforms are subjected to vacuum heat treatment under vibration conditions. The vibration method is mechanical vibration, the vibration frequency is set to 10-50Hz, the vibration amplitude is set to 0.1-1mm, the heating temperature of vacuum heat treatment is 1000-1200℃, the holding time is 1-6h, and the vacuum degree is ≤10Pa, so that the distribution state of the copper phase in the copper-containing carbon slide plate preforms is transformed into a network.

2. A copper-containing carbon slide plate, characterized by: The copper-containing carbon slide plate was manufactured using the method described in claim 1.

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