加入Ni—Al,W—Ni,W—Co二元添加剂时的CuCr25合金的组织与性能

Microstructures and Properties of CuCr25 Alloys Melted by Vacuum Induction

摘要:

研究了真空感应熔炼（VIM）制备CuCr25系触头材料，选择水冷凝固及加入Ni-Al,W-Ni,W-Co二元添加剂得到的触头材料致密度高、氧含量低。讨论了合金元素和微观结构在对物理性能与电击穿性能的影响，结果表明，适当的冷速、合理的添加元素能显著改善材料的显微组织、细化Cr晶粒；W，Co还对Cr相进行了有效的选择强化，合金的耐电压强度明显提高。

Abstract:

The CuCr25 alloys with high density and low oxygen content were prepared by means of vacuum induction melting. The effects of alloying elements (Ni-Al,W-Ni,W-Co) and microstructure on the physical properties and dielectric strength were investigated.The experimental results show that the chromium grains are refined when appropriate solidifying method and alloying elements are selected.On the other hand, the tungsten and cobalt serve the function of strengthening chromium phase.As a result, the dielectric strength increases notably.