Author/Authors :
Saeedipour، .S نويسنده Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran , , Kermanpur، .A نويسنده Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran , , Najafizadeh، .A نويسنده Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran , , Abbasi، .M نويسنده Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran ,
Abstract :
In this study, the effects cold rolling and annealing parameters during thermomechanical processing of the AISI
201LN stainless steel were investigated. The cast samples were homogenized, hot-rolled and solution-annealed to
acquire a suitable microstructure for the subsequent thermomechanical treatment. Unidirectional and transverse
multi-pass cold rolling at 25, 0 and -15 °C was carried out to 90% reduction in thickness, followed by annealing at
temperature range of 700–900 °C for different times of 15–1800 s. Microstructures were characterized by optical
and scanning electron microscopy, X-ray diffraction and feritscope measurements. Hardness test was also used
for evaluating mechanical properties of the specimens. The results showed that the saturation strain of martensite
formation during the cold rolling at 25, 0 and -15 °C in 201LN stainless steel was about 0.29, 0.23 And 0.17,
respectively. A nano/ultrafine grained structure was formed by annealing the 90% cold rolled specimen at 800 °C
for 60 s with a grain size of about 300 nm.
