| Cu-Cr-Zr alloy is high strength and high conductivity copper alloy which is belong to the precipitation strengthening type alloy.Many researchers studied its solid solution aging field,while high temperature and hot deformation research was less.This paper attempted to explore the parameters of high temperature hot deformation process of Cu-Cr-Zr alloy for cold rolling aging Cu-Cr-Zr alloy by using Gleeble-1500 thermal simulation testing machine.It had discussed the hot deformation behavior of influencing factors: deformation temperature,deformation rate and deformation.The influence of the microstructures and properties of alloy were studied by observing thermal compression experiments.Material model was established by deformation parameters database to explore the large finite element software Deform 3D to simulate Cu-Cr-Zr alloy hot extrusion process.The deformation parameters: deformation temperature: 500 ?,600 ?,700 ?,800 ?,deformation rate: 0.01 s-1,0.1 s-1,1 s-1and deformation: 25%,50%.Finally Cu-Cr-Zr alloy true stress-strain curve was generated,the deformation of thermal activation energy was calculated,the hot working diagram was mapped,and safe processing area was get.When the deformation is constant,the rheological stress of Cu-Cr-Zr alloy decreased with the increase of deformation temperature.The high temperature thermal activation energy of Cu-Cr-Zr alloy Q=600.2 kJ/mol.Reasonable safe processing parameters: the deformation temperature is between 700-800 ? and the deformation rate is about 0.1 s-1.Organization was analyzed on the Cu-Cr-Zr alloy.Within the scope of deformation temperature 500 ?,the dynamic response mechanism played a main role.Within the scope of deformation temperature 600 ? to 800 ?,the dynamic recrystallization was leading role;With the temperature of deformation increase alloy grain size decreased.The strain rate increase,alloy grain size increased.Deformation of large grain size was low.After hot deformation,alloy precipitated phase was Cr elemental.The precipitated phase of Cr elemental content gradually reduced with the increase of the deformation rate.Hardness value decreased with the increase of temperature for the dynamic response translating to the dynamic recrystallization.Cu-Cr-Zr material database was established in the Deform 3D software.The alloy flow stress curve,related parameters of strain,Cu-Cr-Zr alloy thermal deformation constitutive equation and the finishing material were imported into the database.Cu-Cr-Zr alloy hot extrusion process parameters was analyzed to control the extrusion temperature and extrusion speed reasonably. |
PDF Full Text Request