| TWIP steel is a kind of high strength and high plasticity and steel, because it canmaintain high strength at the same time also can get a high strength. To improve nextprocessing performance, design low Si, Al content TWIP steel smelting composition andget three kinds of different alloy composition of TWIP steel. To study the mechanicalproperties of three kinds steel, after heat treatment and hot rolling on the hightemperature deformation, impact and tensile three aspects of research.To study TWIP steel’s high temperature deformation behavior of TWIP steel,simulation experiment was done. Thermal simulation experiment through thedeformation rate, deformation temperature is650℃,750℃,850℃,950℃,1050℃,1150℃in the condition of two different components of TWIP steel high temperaturedeformation behavior were studied. Draw the flow stress under different deformationconditions, found out the deformation resistance decreases with the rise of temperature,and with the increasing of deformation rate increases.The impact test at room temperature show the impact tenacity of three kinds TWIPsteel reached high values, especially the impact tenacity value of1#steel is171J/cm2.Theimpact of the three kinds of steel fracture to ductile fracture, SEM observation of fracturemorphology of equiaxial toughening. For three kinds of experiments of steel formetallographic observation, you can see that in the fracture can see many mechanicaltwins. TWIP steel at room temperature before and after deformation organization are allaustenitic, after drawing within the grain deformation twins. Elongation twin, promotethe growth of the strain induced by the mechanical twin induced plasticity, namely theTWIP effect, good extensibility is brought by the TWIP steel. |
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