Research on elevated temperature tensile ductility of 2304 economical duplex stainless steel
The high temperature tensile behavior of 2304 economical duplex stainless steel was studied in the temperature of 750～1150℃ by using Gleeble-3500 thermal simulation machine.The fracture surface was analyzed using scanning electron microscopy and EBSD analysis detection methods.The equilibrium phase diagram of 2304 duplex stainless steel were calculated by Thermo-calc software.The results show that within the temperature range of 750～1 150 ℃,the cross-sectional shrinkage rate increases sequentially with the increase of temperature,and the peak stress decreases sequentially.The stress is mainly distributed in the austenite phase.2304 duplex stainless steel has good high-temperature thermoplasticity in the temperature range of 950～1 150 ℃,and the fracture surface is mainly composed of ductile dimples,which is a typical ductile fracture.The two factors of temperature increase and decrease in austenite content lead to good thermoplasticity.
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