Title: Effectiveness of deep cryogenic treatment in improving mechanical and wear properties of cold work tool steels

Authors: B. Podgornik; D. Uršič; I. Paulin

Addresses: Institute of Metals and Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia ' Institute of Metals and Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia ' Institute of Metals and Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia

Abstract: In recent years, deep cryogenic treatment (DCT) is getting increased attention in many tooling applications as a mean to improve tool performance. However, contradictory results are reported indicating improved as well as deteriorated wear resistance. The goal of this work was to investigate effect of DCT on wear properties of tool steel and how they change depending on the tool steel type, and hardness and fracture toughness obtained. Results show that steel composition considerably affects the way how cryogenic treatment changes steel properties. For low carbon tool steel toughness properties can be improved for up to 70% at only minor hardness drop, but are quite limited in the case of high-speed steel, while at high carbon content both hardness and toughness are deteriorated. In general, DCT was found to result in reduced abrasive wear resistance except for cases of combined hardness and fracture toughness improvement.

Keywords: deep cryogenic treatment; DCT; wear resistance; fracture toughness; hardness; tool steel.

DOI: 10.1504/IJMMP.2017.091098

International Journal of Microstructure and Materials Properties, 2017 Vol.12 No.3/4, pp.216 - 229

Received: 03 Feb 2017
Accepted: 17 May 2017

Published online: 03 Apr 2018 *

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