PSI - Issue 43

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 43 (2023) 312–317

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. Abstract This paper deals with the possibilities of heat treatment of a pair of to l steels, prod c by t owder metallurgy. The investigated te ls named M390 and M398 belong to the group of high-alloy chromium steels used in the plastics industry in th roduction of s rews for injection moulding ma hine unit. The steels were heat treated u ing quenching or que c ing with deep freezing to achieve a homogeneous martensitic tructur . Subsequently, th pai of ste ls was tempered twice in the temperature range from 200 °C t 600 °C. The giv n samples were experimentally te ted for hardness and notch toughness using a Charpy hammer. Th results compared the value f hardness and notch toughness depending on the tempering temperature. Selected fractures were observed using SEM microscopy. © 20 23 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. 10th International Conference on Materials Structure and Micromechanics of Fracture Effect of heat treatment on notch toughness of powdered tool steels M390 and M398 Róbert Cíger a , Michal Krbaťa a , Marta Kianicová a , Maroš Eckert a , Henrieta Chochlíková a * a Faculty of Special Technology, Alexander Dubcek University of Trenčín, Ku kyselke 469, 911 06 Trenčín, Slovakia Abstract This paper deals with the possibilities of heat treatment of a pair of tool steels, produced by the powder metallurgy. The investigated steels named M390 and M398 belong to the group of high-alloy chromium steels used in the plastics industry in the production of screws for injection moulding machine unit. The steels were heat treated using quenching or quenching with deep freezing to achieve a homogeneous martensitic structure. Subsequently, the pair of steels was tempered twice in the temperature range from 200 °C to 600 °C. The given samples were experimentally te sted for hardness and notch toughness using a Charpy hammer. The results compared the values of hardness and notch toughness depending on the tempering temperature. Selected fractures were observed using SEM microscopy. 10th International Conference on Materials Structure and Micromechanics of Fracture Effect of heat treatment on notch toughness of powdered tool steels M390 and M398 Róbert Cíger a , Michal Krbaťa a , Marta Kianicová a , Maroš Eckert a , Henrieta Chochlíková a * a Faculty of Special Technology, Alexander Dubcek University of Trenčín, Ku kyselke 469, 911 06 Trenčín, Slovakia 1. Introduction Plastic injection moulding is the most widespread and economically advantageous method of producing plastic parts in large-scale production as published by Bradley et al. 2022, and Klocke et al. 2016. The use of tool steels in the production of functional parts of injection moulding machines is essential to ensure trouble-free long-term operation. Tool steels used in the production of screws, injection cylinders, moulds must meet strict criteria in terms 1. Introduction Plastic injection m ulding is the most widespread and economically advantageous method of pr ducing plastic parts in large-scale production as published by Bradley et al. 2022, and Klocke et al. 2016. The se of tool steels in the producti n of functional parts of injection mouldi g machines is essential to ensure trouble-free long-term operation. Tool steels used in the production of screws, injection cylinders, moulds must meet strict criteria in terms Keywords: tool steel; powder matellurgy; fatigue; fracture; microstructure Keywords: tool steel; powder matellurgy; fatigue; fracture; microstructure

* Corresponding author. Tel.: +421-32-7400 218 E-mail address: henrieta.chochlikova@tnuni.sk * Correspon ing author. Tel.: +421-32-7400 218 E-mail address: henrieta.chochlikova@tnuni.sk

2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. 2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. 10.1016/j.prostr.2022.12.277