Effects of Trace Te on Microstructure and Properties of Cu-Cr-Zr Alloy
The influence of Te content on the as-cast structure and properties of Cu-Cr-Zr-Te alloy was studied by SEM,EDS and other micro-characterization and micro-hardness and electrical conductivity testing methods.The results show that with the increase of Te content,the hardness of the as-cast Cu-Cr-Zr-Te alloy gradually increases,but the electrical conductivity basically tends to a stable state.The hardness and electrical conductivity of the alloy increase after hot forging.In as-cast Cu-Cr-Zr-Te alloy,the low content of Te and Zr have a strong binding force,which is easy to form CuZrTe compounds.Increasing the content of Te tends to form CuCrTe compounds;after the alloy is heated at 900℃/4h and hot forging treatment,the CuCrTe compound decomposed into a Te-rich phase and a Cr-rich phase results in the depletion of Te element in the matrix,resulting in the decrease in the relative ratio of element Te and Cr to form CuZrTe compounds.
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