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Paper Title
Study the effect of concentration of ethylene glycol on heat transfer and hardness during quenching of EN9 steel
  Bhamare Devendra M,  Sachin V Mutalikdesai,  G P Bharambe

Heat treatment is mainly employed to alter the physical properties of the steels. After heat treatment Steel components are generally quenched in forced gas, oil or water flow to improve mechanical properties and improve product life. During the quenching process, rapid heat transfer takes place from hot metal component to the surrounding quenching medium. This rapid heat transfer in quenching process introduces the temperature gradient as the surface cools faster than core of the heated component. This variation in cooling rates may give rise distortion, cracking and high residual stresses along with variation in hardness. This variation is due to difference in conduction and convection heat transfer rates. To minimize such problems while improving mechanical properties, it needs to optimize the process for both part geometry and quenching process design. In this work the attempt is made about reducing the convective heat transfer to avoid the distortion and cracking by addition of ethylene glycol in water with different concentrations. The EN 9 steel material model behavior during quenching is to be observed and study the heat transfer characteristics along with changes in properties of steel specimen. The data obtained by experimental work is be plotted to observe the effect on cooling rate and the material property like hardness is measured using Rockwell hardness tester with cone shape diamond indenter.

Keywords- Quenching, distortion, cracking, residual stress, ethylene glycol, temperature gradient.
Publication Details
Unique Identification Number - IJEDR1602379
Page Number(s) - 2160-2166
Pubished in - Volume 4 | Issue 2 | July 2016
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)
Cite this Article
  Bhamare Devendra M,  Sachin V Mutalikdesai,  G P Bharambe,   "Study the effect of concentration of ethylene glycol on heat transfer and hardness during quenching of EN9 steel", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.4, Issue 2, pp.2160-2166, July 2016, Available at :http://www.ijedr.org/papers/IJEDR1602379.pdf
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