1 results listed
In this study, isothermal annealing was performed to
C70 quality steel sheet in a salt bath at 250 °C and 350 °C for 10 s,
1 min, 10 min, and 60 min after austenitizing performed at 850 °C
for 150 s and the samples were then tempered at 415 °C for 150 s.
Effect of these heat treatments on microstructure, hardness and
bending properties was then investigated. Results showed that the
initial ferrite and pearlite microstructure generally transformed
into martensite. Tempered martensitic microstructure was
obtained after tempering heat treatment. Hardness of the samples
has a decreasing tendency with increasing annealing times at a
given annealing temperature. Tempering heat treatment
decreases the hardness values obtained after isothermal
annealing, as expected. However, hardness values after tempering
did not exhibit a significant variation with respect to isothermal
annealing time. As compared to original sample, the application
of tempering after isothermal annealing increases bending
strength, and bending strain also increases getting closer to values
exhibited by the original sample.
International Iron & Steel Symposium
UDCS
Serdar Kuzkaya
Yakup Yurekturk
Faiz Muhaffel
Murat Baydogan