NDLI: Studies on induction hardening of powder-metallurgy-processed Fe

Content Provider	Springer Nature Link
Author	Chauhan, Sandeep Verma, Vikas Prakash, Ujjwal Tewari, P.C. Khanduja, Dinesh
Copyright Year	2017
Abstract	Induction hardening of dense Fe–Cr/Mo alloys processed via the powder-metallurgy route was studied. The Fe−3Cr−0.5Mo, Fe−1.5Cr−0.2Mo, and Fe−0.85Mo pre-alloyed powders were mixed with 0.4wt%, 0.6wt%, and 0.8wt% C and compacted at 500, 600, and 700 MPa, respectively. The compacts were sintered at 1473 K for 1 h and then cooled at 6 K/min. Ferrite with pearlite was mostly observed in the sintered alloys with 0.4wt% C, whereas a carbide network was also present in the alloys with 0.8wt% C. Graphite at prior particle boundaries led to deterioration of the mechanical properties of alloys with 0.8wt% C, whereas no significant induction hardening was achieved in alloys with 0.4wt% C. Among the investigated samples, alloys with 0.6wt% C exhibited the highest strength and ductility and were found to be suitable for induction hardening. The hardening was carried out at a frequency of 2.0 kHz for 2–3 s. A case depth of 2.5 mm was achieved while maintaining the bulk (interior) hardness of approximately HV 230. A martensitic structure was observed on the outer periphery of the samples. The hardness varied from HV 600 to HV 375 from the sample surface to the interior of the case hardened region. The best combination of properties and hardening depth was achieved in case of the Fe−1.5Cr−0.2Mo alloy with 0.6wt% C.
Starting Page	918
Ending Page	925
Page Count	8
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	24
Issue Number	8
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2017-07-29
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fe–Cr/Mo alloys powder metallurgy sintered density tensile strength induction hardening case depth Materials Science Metallic Materials Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Materials Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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