(1. 哈爾濱工業(yè)大學 材料科學與工程學院， 哈爾濱 150001；
2. 浙江省 寧波市科技技委員會，寧波 315041)
摘 要: 采用機械合金化工藝由Cu，Cr元素粉按質(zhì)量比各半合成CuCr預合金粉，然后采用爆炸燒結(jié)工藝制備真空斷路器用電觸頭材料CuCr合金，著重研究了工藝參數(shù)對CuCr觸頭材料性能的影響。結(jié)果表明：采用該工藝能制備高密度(超過7.398 g/cm3)、高硬度(超過HB144)和低電導率(低于106 kS/m)的CuCr觸頭材料； 球磨時間對CuCr合金性能影響較大，隨著球磨時間的增加，CuCr合金密度和硬度逐漸升高，而電導率則減小；裝藥密度對CuCr合金的性能影響較小；藥粉比或藥粉筒比選擇得太高或太低都會引起CuCr合金性能的降低。
關(guān)鍵字: 機械合金化; CuCr合金; 爆炸燒結(jié)
materials made by explosive sintering
JI Song2, HU Wei-ye2, GONG Zhao-hui2
（1. School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, P.R.China；
2. SciTech Committee of Ningbo, Ningbo 315041, P.R.China）
Abstract:The CuCr alloy powders (the mass ratio was 1∶1) were made by mechanical alloying, then CuCr alloys for the vacuum breaker were aprepared by explosive sintering. The effect of the technology parameters on the characteristics of the CuCr contact materials was studied. The results show that CuCr contact materials with higher density (＞7.398 g/mm3), higher rigidity (＞HB144) and lower conductance (106 kS/m) can be made by the process; grinding time has important effect on the characteristics of CuCr alloy, the longer the grinding time is, the higher the density and the rigidity of the CuCr alloy is, and the lower the conductance of the CuCr alloy is. The effect of the explosive density on the characteristics of CuCr alloys is not obvious; when the ratio of explosive to powder or the ratio of explosive to powder and tube is too large or too low, the characteristics of the CuCr alloys are deteriorated.
Key words: mechanical alloying; CuCr alloys; explosive sintering
