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形变Cu-11Cr-0.07Ag原位复合材料的组织和性能

, PP. 140-144

Keywords: 形变原位复合材料,Cu-11Cr-0.07Ag,微观组织,力学性能,导电性能

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Abstract:

采用熔铸-中间热处理-变形工艺制备了形变Cu-11Cr-0.07Ag原位复合材料,利用扫描电镜、数字微欧计及液晶电子拉力试验机研究了材料的微观组织、力学性能和导电性能。结果表明:随着冷加工变形量的增加,铸态无序分布的Cr枝晶状组织逐渐转为沿线拉方向排列,形成定向排列的Cr纤维,抗拉强度大幅提高,电导率略有下降。经适当冷加工变形和中间热处理后的形变Cu-11Cr-0.07Ag原位复合材料具有较好的强度和电导率匹配。冷加工变形量为8时,其抗拉强度和电导率分别达到851MPa和73.9%IACS。

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