摘要
通过铜模快速凝固制备了Cu-30Cr_(2)Nb合金,在空气中分别开展了该合金及纯铜的烧蚀试验,研究了其烧蚀行为。研究表明,冷却速率是影响Cu-30Cr_(2)Nb合金中Cr_(2)Nb尺寸和形貌的主要因素,随冷却速率升高,Cr_(2)Nb平均尺寸降低,同时其形貌由长条状转变为短棒状再变为细颗粒状;相对于纯铜,Cu-30Cr_(2)Nb合金弧斑面积增大、电流密度降低、弧斑更平整,Cu-30Cr_(2)Nb合金抗烧蚀性能的提升与电流密度的降低和Cr_(2)Nb相的热发射电子相关。
The Cu-30 Cr_(2)Nb alloy was prepared by rapid solidification in copper mould.The electric-ablation behaviors of the Cu-30 Cr_(2)Nb alloy and pure copper was investigated comparatively by discharging in air.The results indicate that cooling rate is the main factor affecting the size and the morphology of Cr_(2)Nb phase.With the cooling rate increasing,the average size of Cr_(2)Nb particles is decreased and the morphology is transformed from long bars to short rods,then to fine spherical particles.Compared with pure copper,Cu-30 Cr_(2)Nb alloy exhibits larger arc spot area,lower current density and smoother arc spot.The higher electric-ablation resistance of Cu-30 Cr_(2)Nb alloy is related with the reduced current density and the heat emission of electrons from Cr_(2)Nb particles.
作者
韩建军
钱文晓
郭金刚
党乐
张俊双
袁竭
刘源
Han Jianjun;Qian Wenxiao;Guo Jingang;Dang Le;Zhang Junshuang;Yuan Jie;Liu Yuan(East Inner Mongolia Electric Power Co., Ltd.;School of Materials Science and Engineering, Tsinghua University;Institute of Tsinghua University,Hebei)
出处
《特种铸造及有色合金》
CAS
北大核心
2021年第11期1440-1445,共6页
Special Casting & Nonferrous Alloys
关键词
电极材料
烧蚀
高压隔离开关
Electrode Materials
Electric-ablation
High Voltage Isolating Switch
