Method for preparing high-voltage switch contact with gradient structure through cold spraying
The cold spraying and laser sintering method for Cu-Cr-TiSi alloy contactors addresses the cost and performance issues of existing methods by creating a gradient structure with graphene-coated TiSi particles, resulting in high-density, conductive, and arc-resistant contactors.
CN119710672APending Publication Date: 2025-03-28HENAN XINFENG NEW MATERIALS CO LTD
0 Cites 0 Cited by
Patent Information
- Application Number
- CN202411905219.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
Current methods for preparing Cu-Cr alloy contactors are costly, result in low density materials, and fail to simultaneously maintain high conductivity and resistance to electrical arc erosion and welding, due to defects like microcones and high porosity.
Method used
A method involving cold spraying and laser sintering to create a gradient structure in Cu-Cr-TiSi alloy contactors, using TiSi particles coated with graphene to enhance density and conductivity, and controlling chromium powder feed rate for improved arc resistance.
Benefits of technology
The method reduces porosity, increases density, and enhances both electrical conductivity and arc resistance, achieving a cost-effective, high-performance contactor with improved durability.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a cold spraying preparation process, in particular to a method for preparing a high-voltage switch contact with a gradient structure through cold spraying. Comprising the following steps: preparing graphene-coated T S core-shell coated powder (T S (at) G); uniformly mixing the prepared T S (at) G with copper powder to prepare mixed powder, and respectively filling the mixed powder and Cr powder into two powder feeding boxes of cold spraying equipment; the base body is pretreated, and the pretreated base body is fixed to a workbench to be preheated; spraying treatment is conducted on the base body, a Cu-Cr-Ti S i (at) G coating is prepared on the surface of the base body, and the powder feeding rate of Cr powder is gradually increased in the spraying process so that the Cu-Cr-Ti S i (at) G coating of a gradient structure can be prepared; and irradiating the prepared Cu-Cr-Ti S i (at) G coating by adopting a laser beam, and carrying out alloying treatment on the Cu-Cr-Ti S i (at) G coating to prepare the high-voltage switch contact. The process steps are simple, the preparation cost is low, and the prepared high-voltage switch contact is high in density and has excellent electrical conductivity, thermal conductivity, fusion welding resistance and arc ablation resistance.
Need to check novelty before this filing date? Find Prior Art