Metallurgical Engineering

Metallurgical Engineering

Effect of Pearlitizing on the as cast and as heat-treated Microstructure of Hadfield Steels

Document Type : Research Paper

Authors
milad Khayat 1
Sh Kheirandish 2
Majid Abbasi 3
1 M.Sc. Graduated Student, School of Metallurgy and Materials Engineering, Iran University of Science and Technology
2 Professor, School of Metallurgy and Materials Engineering, Iran University of Science and Technology
3 Assistant Professor, Department of Materials Engineering, Babol Noshirvani University of Technology,
10.22076/me.2017.29729.1036
Abstract
In this paper, the effects of pearlitizing on the as cast and as heat-treated microstructures of austenitic manganese steel (named Hadfield steel) were evaluated. The samples with different contents of carbon and manganese were produced using induction furnace and precision casting method. The as-cast, annealed, and solution treated microstructural studies were performed by optical microscopy, X-ray diffraction, ferritescopy and field emission scanning electron microscopy. The microstructural results showed that the as cast and annealed microstructures of the steel in room temperature consist of austenite matrix, carbide and ferrite. Fine examination by scanning electron microscope shows that the ferrite and carbide phases are formed as pearlitic colonies. It was also observed that the increase in carbon content and annealing heat treatment are more facilitated the pearlitizing. By applying the final heat treatment (solution and quenching in water), pearlite colonies convert to new fine austenite grains and then the austenite grains sizes are decreased.
Keywords
Hadfield Steel؛ Pearlitizing
Grain size
Heat treatment
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  • Receive Date 08 October 2015
  • Revise Date 20 March 2016
  • Accept Date 20 March 2016