郭聪慧
,
段文新
,
杨志懋
,
王伟
,
王学成
,
丁秉钧
稀有金属材料与工程
自行设计了电弧腐蚀速率的测量方法,避免了一般电弧腐蚀速率测量中存在的不足,并对真空断路器中常用的CuCr25,CuCr50触头材料以及纯Cu和纯Cr的电弧腐蚀速率进行了测量.研究结果表明,纯Cu,CuCr25,CuCr50和纯Cr的电弧腐蚀速率分别为52.9μg/C,33.2μg/C,31μg/C和25.9μg/C.CuCr25和CuCr50的电弧腐蚀速率相差不大,都较纯Cu有大幅度的降低,而与纯Cr的电弧腐蚀速率比较接近.此外,用SEM对4种触头材料经100次燃弧之后的电极表面进行了现测,清楚地反映了经电弧腐蚀之后触角材料的表面特征.
关键词:
电弧腐蚀速率
,
CuCr25
,
CuCr50
,
触头材料
C.Y.Zhang
,
Y.P.Wang
,
Z.M.Yang
,
B.J.Ding
,
Y.L.Li
金属学报(英文版)
CuCr25 alloys containing different Ni content were prepared by vacuum induction melting(VIM)l.The microstructure and proerties were tested.The results show that with the increase of Ni content in CuCr25 alloys,the Cr phase changed from developed dendrite into nodular grains and was drastically refined;the electrical con-ductivity significantly decrease,but still reach the level of convenlional CuCr50 when the Ni content is below 0.5The Ni content had little influence on their breakdown strength.The first breakdown sites transferred to the boundoary of Cu and Cr phase for CuCr25Ni compared to the Cr phase for CuCr25 without Ni.
关键词:
CuCr25
,
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,
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