摘要
采用机械合金化与热静液挤压技术制备了Ｃｕ５％Ｃｒ合金块体材料，研究了该材料的显微组织、力学性能和导电性，探讨了材料的强化机理，揭示了机械合金化时间和挤压温度对材料组织性能的影响规律。结果表明，机械合金化Ｃｕ５％Ｃｒ合金组织细小均匀，兼有细晶强化、弥散强化和沉淀强化效果，因此具有很高的抗拉强度，其值高达８００～１０００ＭＰａ。同时，合金仍具有较好的塑性和良好的导电性能，其伸长率达５％左右、相对电导率达５５％～７０％ＩＡＣＳ。
The paper presents a process that Cu5wt.%Cralloy powder made from industrial Cu and Cr
powder with purity of 99.9% by mechanical alloying is extruded by hot isostatic extrusion.The
effect of mechanical alloying time and main extrusion processing parameters on the
microstructure,mechanical properties and conductivity of Cu5wt.%Cralloy material was
investigated.The result shows that the grain size of Cu5wt.%Cralloy gets smaller and its
strength increases markedly with mechanical alloyins time.The combination of strength and
elongation of the material extruded at about 600 comes up to optimum and its conductivity is
higher too.Increment of extrusion ratio is beneficial to the increase of bond strength of powder
and conductivity of material.The material will find wide application in new electrode of
resistance brazing.
出处
《粉末冶金工业》
CAS
1999年第3期7-12,共6页
Powder Metallurgy Industry
关键词
机械合金化
铜铬合金
制备
组织
性能
mechanical alloying,hot isostatic
extrusion,Cu5wt.%Cralloy,mechanical property,conductivity
