Effects of Velocity of Impact on Mechanical Properties and Microstructure of Medium Carbon Steel during Quenching Operations
No Thumbnail Available
Scientific Research Publishing Inc. (Engineering)
Theoretical analysis of the effects of the velocity of impact using suitable heat transfer equations expressed in forms of finite difference method was developed and used to determine their effects on the characteristic cooling parameters during the quenching process. Various velocities of impact obtained by varying the heights of specimen drops were also used to experimentally determine their effects on characteristic cooling parameters and mechanical properties of medium carbon steel using water as the quenching medium. At a height of drops of 0.5 m, 1.0 m, 1.5 m, and 2.0 m, the tensile strength of the material is 410.4, 496.12, 530.56, and 560.40 N/mm2 respectively. The corresponding hardness values are 42.4, 45.2, 46.2, 50.5 HRC respectively. It is found that as the velocity of impact increases, the maximum cooling rate increases. Hardness and ultimate tensile strength also increase. There are good agreements between theoretical and experimentally determined values of critical cooling parameters of water during quenching operations.
Quenching , Modeling , Velocity , Impact , Mechanical Properties , Steel , Research Subject Categories::TECHNOLOGY
Agboola, J.B., Kamardeen, O.A., Mudiare, E. and Adeyemi, M.B. (2015) Effect of Velocity of Impact on Mechanical Properties and Microstructure of Medium Carbon Steel during Quenching Operations. Engineering, 7, 434- 445. http://dx.doi.org/10.4236/eng.2015.77039