一种石墨烯增强铜钨合金材料、制备方法、电触头及应用
By developing a method for preparing graphene-reinforced copper-tungsten alloy materials, the problem of improving the overall performance of contact materials for SF6 circuit breakers with voltage levels of 800kV and above has been solved. This method achieves a synergistic improvement in the material's high density, excellent conductivity, tensile strength, bending strength, friction and wear resistance, and arc erosion resistance, thus meeting the requirements for long-term fault-free operation of ultra-high voltage power grids.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD
- Filing Date
- 2026-02-27
- Publication Date
- 2026-07-17
AI Technical Summary
The contact materials used in SF6 circuit breakers with voltage levels of 800kV and above are difficult to improve in a synergistic way in terms of electrical, mechanical and arc erosion resistance. Traditional copper-tungsten alloys are prone to surface vaporization and core cracking under the combined effect of high-frequency arc and SF6 decomposition gas, which cannot meet the requirements of long-term fault-free operation of UHV power grids.
A method for preparing graphene-reinforced copper-tungsten alloy materials was adopted. Through layered cold pressing, hot pressing composite, vacuum melting and densification treatment, a gradient distribution of tungsten content was formed, the microstructure density was optimized, and the overall performance of the material was improved.
It significantly improves the microstructure density of copper-tungsten alloy materials, reduces internal defects, and achieves a synergistic improvement in mechanical properties, electrical conductivity, friction and wear resistance, and arc erosion resistance, thus meeting the long-term fault-free operation requirements of ultra-high voltage power grids.
Smart Images
Figure CN121718739B_ABST