Studies on induction hardening of gray iron and ductile iron |
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Authors: | G Balachandran Aravind Vadiraj B S Sharath B R Krishnamurthy |
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Affiliation: | (1) Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India |
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Abstract: | The effect of induction case hardening of a gray cast iron (FG 260) and SG iron (600/3) as a function of applied induction
power has been studied. The influence of various operating parameters on the penetration depth has been analysed. The case
depth as a function of applied power and the associated changes in microstructure has been investigated. The case depth of
SG iron was found to be twice than the gray iron due to higher resistivity of the material and increase in depth of penetration.
Both hardness and the depth of penetration increased with increase in applied power associated with martensitic case formation.
The surface hardness of both the irons varies between 600 to 800 VHN. The core microstructure in both the irons displayed
pearlitic matrix. In the case of SG iron, the nodule size, sphericity and nodularity have reduced in the induction hardened
case compared to the core. |
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