Evolution laws of structure and performance of Cu-10Ni-1Fe-1Mn alloy in the process of continuous casting-planetary rolling-drawing deformation were studied by OM, SEM, TEM, Brinell Hardness tester and universal material testing machine. Results demonstrated that the alloy ingot is composed of thick dendrites. The ingot makes grain crushing and dynamic recrystallization after planetary rolling. The hot rolling samples still have abundant fine recrystallization textures after multi-pass drawings. Due to roller-core head or internal-external mold opposite pressure, dislocations in different regions of sample move along the glide plane, forming a macroscopic slip band. Two adjacent macroscopic slip zones which move toward opposite directions compose the folded structures after the deformation. Refined crystalline strengthening, solution strengthening of Fe, Ni and Mn, work hardening, and iron-containing particle precipitation are major causes of alloy strengthening. SEM analysis of tensile fracture demonstrated that the material still maintained good plasticity after rolling and drawing deformation. However, material plasticity declined with the increase of cold processing-induced deformation.
An Arrangement and Performance Analytics of Elements of Vibration Testing Machine for Taper Roller Bearing
