An analysis of induction hardening of ferritic ductile iron |
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Authors: | Bo?o Smoljan Franjo Cajner Darko Landek |
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Affiliation: | (1) Faculty of Engineering, University of Rijeka, Vukovarska 58, 5100 Rijeka, Croatia;(2) Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lucica 1, 10000 Zagreb, Croatia;(3) Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb Ivana Lucica 1, 10000 Zagreb, Croatia |
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Abstract: | Achievements of the induction hardening of ferritic ductile iron were investigated. Ductile iron is not advisable for use
in induction hardening because of the small carbon content in the metal matrix of ferritic ductile iron. The carbon content
in the metal matrix of ductile iron can be increased by additional preparation of metal matrix before final induction heat
hardening. Wear resistance of the induction hardened ferritic ductile iron can increase as result of increased carbon content
of the metal matrix and higher hardness after induction hardening. Some heat pretreatments for metal matrix preparation were
applied before the induction hardening of ferritic ductile iron. The process parameters of the induction hardening heat pretreatment
were analyzed and optimized. According to recommended elemental composition of ferritic ductile iron and required mechanical
properties, the process parameters of the investigated induction heat pretreatment were optimized. The efficiency of pretreatment
processes of induction hardening was analyzed. Applicability and manufacture ability of engineering components by proposed
heat pretreatments were investigated. The limitations of the investigated heat pretreatment applications were estimated by
the comparison of mechanical properties of heat-treated specimens. |
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Keywords: | ductile iron ferritic iron induction hardening metal matrix |
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