Effects of Velocity of Impact on Mechanical Properties and Microstructure of Medium Carbon Steel during Quenching Operations
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Date
2015-07-17
Authors
Agboola, J.B.
Abubakre, O.K.
Mudiare, E.
Adeyemi, M.B
Journal Title
Journal ISSN
Volume Title
Publisher
Scientific Research Publishing Inc. (Engineering)
Abstract
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.
Description
Scholarly publication
Keywords
Quenching , Modeling , Velocity , Impact , Mechanical Properties , Steel , Research Subject Categories::TECHNOLOGY
Citation
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