The influence of unconventional heat treatment methods on the utility properties of selected tool steels – POSTER

Kuřík Martin - Czech Technical University in Prague (Czech Republic)

Heat treatment of tool steels is a key operation for the proper functioning of tools. Required hardness can be achieved by various procedures of heat treatment, but the impact to the other mechanical properties may not be advantageous for a given tool/application combination and thus lead to a lower lifetime of tool. Modern production processes of tool steels enable the achievement of high-quality steel structure and unique chemical composition. The available data sheets for these steels usually contain only tempering diagrams, which may not always be a sufficient source of information for the correct design of the heat treatment of part. As part of this work, the author focused on two tool steels for cold work prepared by powder metallurgy ASP 2023 and ASP 2005 with the aim of finding a suitable heat treatment for the punch. The heat treatment regimes used were designed with regard to achieving the required hardness of 62+2 HRC and also to evaluate the effect of austenitizing and cryogenic temperatures. The evaluating was done by hardness, microstructure analysis including carbide quantification and qualification, wear resistance and cyclic stress resistance.
Key words
Powder metallurgy, tool steels, heat treatment, cryogenic treatment, wear, Pin on disk, fatigue test

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