Title of article :
The effect of quenching media and annealing temperature on graphitization transformation kinetic of CK100 tool steel
Author/Authors :
Rounaghi، .S.A نويسنده Department of Materials Engineering, Ferdowsi University of Mashhad, Mashhad, Iran , , Kiani-Rashid، .A.R نويسنده Department of Materials Engineering, Ferdowsi University of Mashhad, Mashhad, Iran ,
Issue Information :
دوفصلنامه با شماره پیاپی سال 2011
Abstract :
In this research, graphitization transformation of a commercial hypereutectoid steel called CK100 was studied
by the dilatometric experiments at the range of 600 – 700 °C from prior martensitic structure. Also the effect of
quenching media on the initial graphitization time and completion of transformation has been discussed. Also,
graphitization transition from the different prior microstructures was studied using microscopic observations.
Analyzing dilatometric data acquisitions confirmed good following results from Johnson–Mehl–Avrami equation.
By calculating Avrami exponent, following of transformation kinetic from diffusion controlled nucleation and
growth was resulted. Also, the minimum time for completion graphitization transformation was concluded about
45 hrs relative to the water quenched specimen after annealing at 670 °C.
Journal title :
International Journal of Iron and Steel Society of Iran
Journal title :
International Journal of Iron and Steel Society of Iran