【作者】 魏鑫； 王计平； 孙占波； 于德梅； 刘琦；

【Author】 WEI Xin,WANG Ji-ping,SUN Zhan-bo,YU De-mei,LIU-Qi (MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter,State Key Laboratory for Mechanicals Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China)

【机构】 西安交通大学物质非平衡合成与调控教育部重点实验室金属材料强度国家重点实验室；

【摘要】 采用熔体快淬方法制备了Cu₆₀Cr₃₄Zr₂Ti₂Co₂（质量分数,%）合金带,并用机械球磨及真空热压烧结方法制备了触头样品,利用高真空电弧测试分析平台测试了其放电过程,采用扫描电子显微镜（SEM）分析了其电弧特性。结果表明,真空热压烧结可成功地将熔体快淬合金制备成相对密度>95%的触头样品,与熔炼铸造态合金相比,熔体快淬使合金中的Cr粒子尺寸从几十微米减小到400nm以下;使样品具有明显的电弧分散特性,电弧烧蚀明显减轻,而且使截流值明显降低。与熔体快淬Cu₆₀Cr₄₀合金相比,组织中的Cr相尺寸更小,性能改善效果更明显。更多还原

【Abstract】 Melt-spinning was used to prepare Cu₆₀Cr₃₄Zr₂Ti₂Co₂（wt%） ribbons.The ribbons were milled into powders.Subsequently,the contact samples were achieved by hot pressing-sintering.The arc discharge curves were measured by a high vacuum arc test.The morphology of the arc corroded surfaces was analyzed by Scanning Electron Microscopy.The results show that the melt-spun Cu₆₀Cr₃₄Zr₂Ti₂Co₂ ribbons can be prepared into contact material by hot pressing-sintering successfully,the comparative density is better than 95%.The size of the Cr particles could be refined from several microns to 400nm comparing with the melt-casting states.The samples have a low chopping current and exhibit excellent arc dispersion,the arc erosion is slighter.Comparing with the melt-spun Cu₆₀Cr₄₀ alloy,the size of the Cr particles is smaller and the properties could be improved further.更多还原