钨骨架的电弧侵蚀及弯曲特性分析

Analysis on Arc Erosion and Flexural Performance of Tungsten Skeleton

作为制备铜钨合金的关键材料,钨骨架的性能指标直接影响了合金的服役过程。通过粉末冶金法制备了钨骨架,应用电击穿及弯曲试验分析了钨骨架的抗电弧侵蚀及力学性能。结果表明:钨骨架的耐电压强度、截流值及电弧寿命接近于铜钨合金,但其表面被侵蚀程度明显加剧;弯曲断裂以钨颗粒的晶间断裂为主,而且强度极低、脆性极大。

As the key material for the fabrication of CuW alloy, the properties of tungsten skeleton directly affect on the service process of CuW alloy. By powder metallurgy, tungsten skeleton was prepared. The anti-arc erosion performance and mechanical properties of tungsten skeleton were studied by electric breakdown and flexural tests. The results show that the dielectric breakdown strength, chopping current and arc life of tungsten skeleton are close to that of CuW alloy, while the erosion rate of ttmgsten skeleton appears severely. The bending fracture is mainly inter-crystalline fracture of tungsten grains, and the strength is extra low and the brittleness is great.