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...

AI Technical Summary

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 finger and the contact head. The existence of the spring makes the matching structure of the contact finger and the contact head more complicated; (3) the self-cleaning ability of the contact finger is poor; (4) the spring loses its elasticity after long-term use, resulting in contact If the pressure is insufficient, the contact resistance will increase, causing the conductive circuit to overheat and other faults

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