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.讨论了合金元素与微观结构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.
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