A New Approach to Heat Treatment of High-Strength Powder Steels


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Abstract

Wear (pin-on-disk) tests of low-alloy powder steels (with 0.5 and 0.65% C) are performed after vacuum sintering combined with hardening. The studied alloying systems are 0.65% C + 1.5% Cr + 0.2% Mo, 0.65% C + 0.9% Ni + 0.9% Mo + 0.2% Mn and 0.5% C + 4% Ni + 1.5% Cu + 0.5% Mo. The wear resistance of the steels after the hardening sintering is an order of magnitude higher than after the conventional sintering. The wear resistance of the steels increases in the following order: pearlitic, pearlitic-bainitic, and martensitic structures. Accordingly, the hardness grows from 98 to 105 HRB.

About the authors

R. Bidulský

Technical University of Košice, Faculty of Metallurgy, Department of Metals Forming

Author for correspondence.
Email: robert.bidulsky@tuke.sk
Slovakia, Košice

J. Bidulská

Technical University of Košice, Faculty of Metallurgy, Department of Metals Forming

Email: robert.bidulsky@tuke.sk
Slovakia, Košice

M. Actis Grande

Politecnico di Torino, Department of Applied Science and Technology

Email: robert.bidulsky@tuke.sk
Italy, Alessandria

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