Preparation method of CuCrZr alloy material self-operated contact finger product

Abstract

The invention provides a preparation method of a CuCrZr alloy material self-operated contact finger product. The preparation method comprises the following steps: S1, taking raw materials including achromium block, a copper-zirconium 40 intermediate alloy, rare earth and an electrolytic copper plate for later use; S2, smelting the raw materials in a vacuum medium-frequency induction furnace, andobtaining a uniform alloy solution; S3, refining the alloy solution obtained in the S2, degassed and deoxidized and then introducing the solution into a mold for cooling crystallization, and obtainingan alloy ingot after demolding; S4, the alloy ingot obtained in S3 being subjected to extrusion, solution treatment, multi-pass drawing and aging treatment, and obtaining a treated profile; S5, conducting blanking, punching, bending and groove milling on the profile obtained in the S4, and obtaining a contact finger; and S6, performing surface deburring and overall shape correction on the contactfinger obtained in the step S5, and plating a nano-silver layer on the electric contact surface of the contact finger to obtain a self-operated contact finger product with the electric conductivity of greater than 85% IACS, the hardness HB of greater than 155 and the tensile strength of greater than 480MPa.

Description

technical field [0001] The invention belongs to the technical field of new material preparation, and in particular relates to a preparation method of a CuCrZr alloy material self-supporting contact finger product. Background technique [0002] At present, high-voltage disconnectors are developing towards high voltage, large capacity, high mechanical reliability, less maintenance, miniaturization, combination, and long life, which are manifested in the following aspects. [0003] (1) High voltage and large capacity: With the development of large-scale power stations and high-voltage, ultra-high voltage and ultra-high voltage transmission, the technical parameters of high-voltage disconnectors must also be improved accordingly. In particular, develop 800kV and 1000kV high-voltage isolation switches. [0004] (2) High mechanical reliability: It is required to optimize the structure of contacts, contact fingers and conductive loops, reduce conductive connections, and actively u...

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Problems solved by technology

[0007] Traditional contact fingers are generally made of red copper. In order to ensure that the contact fingers have a certain strength and rigidity, there are inevitably the following disadvantages: (1) The thickness of the copper plate is relatively large, which wastes copper and the cost is high; (2) Traditional contact fingers generally use The spring provides the contact pressure between the contact fin

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