Call For Paper Volume:7 Issue:9 Sep'2020 |

Determination of surface heat transfer coefficient during quenching of medium carbon steel

Publication Date : 03/09/2016


DOI : 10.21884/IJMTER.2016.3026.43W19

Author(s) :

Mr. Bhamare Devendra Mothabhau , Mr. Sachin V Mutalikdesai.


Volume/Issue :
Volume 3
,
Issue 8
(09 - 2016)



Abstract :

Abstract- Quenching is an important heat treatment processes during manufacturing of mechanical component. The purpose of quenching is intentional introduction of desired mechanical properties in the components, which will improve their structural as well as functional appearance. Heat treatment is generally followed by transfer of heated component to the environment which uses the quenchants such as forced gas, oil or water flow. During the quenching process, heat is transferred from hot metal component to the quenching medium. This heat transfer in quenching process results in faster cooling of surface than core of the component. This variation in cooling rates may give introduce residual stress and cause distortion and cracking. This variation is due to difference in conduction and convection heat transfer rates. It needs to optimize the quenching process for both part geometry and quenching process design to minimize such problems while improving mechanical properties. In this work the attempt is made to conduct experimental trial of quenching of medium carbon steel with the intention of determination of surface heat transfer coefficient of cylindrical component of material EN 9 steel. The temperature variation during the quenching process is recorded by using K type thermocouple and temperature indicator. Data obtained by experimental work is used to plot temperature variation to observe the variation of cooling rate. From the obtained data HTC is calculated and plotted against time. Keywords— Quenching, HTC, heat flux, cracking, and temperature gradient.


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Determination of surface heat transfer coefficient during quenching of medium carbon steel

August 31, 2016