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Successive boronizing and austempering for GGG-40 grade ductile iron

  • Murat Baydogan
  • Seckin Izzet Akray
Article

Abstract

Boronizing and austempering were successively applied to a GGG-40 grade ductile iron in order to combine the advantages of both process in a single treatment. This new procedure formed a 30 μm thick boride layer on the surface with subsurface matrix structure consisted of acicular ferrite and retained austenite. Reciprocating wear tests showed that successive boronizing and austempering exhibited considerably higher wear resistance than conventional boronizing having a subsurface matrix structure consisting of ferrite and pearlite.

Key words

austempered ductile iron boronizing heat treatment wear 

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Copyright information

© China Iron and Steel Research Institute Group 2009

Authors and Affiliations

  1. 1.Department of Metallurgy and Materials EngineeringIstanbul Technical UniversityMaslak, IstanbulTurkey

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