Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Microstructure and Properties of SLM High Speed Steel

Version 1 : Received: 28 January 2021 / Approved: 29 January 2021 / Online: 29 January 2021 (13:45:40 CET)

How to cite: Elin, O.; Stefan, S.; Taoran, M.; Sebastian, P.; Christophe, L.; Johanna, A. Microstructure and Properties of SLM High Speed Steel . Preprints 2021, 2021010624 (doi: 10.20944/preprints202101.0624.v1). Elin, O.; Stefan, S.; Taoran, M.; Sebastian, P.; Christophe, L.; Johanna, A. Microstructure and Properties of SLM High Speed Steel . Preprints 2021, 2021010624 (doi: 10.20944/preprints202101.0624.v1).

Abstract

Selective laser melting (SLM) is a commonly used laser powder bed technique where the final properties are influenced by many different powder related properties, such as particle size distribution, chemical composition and flowability. In applications where high hardness, wear resistance, strength and good heat properties are required, high speed steels (HSS) are widely used today. HSS has high carbon content and are therefore considered as unweldable. The rapidly growing implementation of AM technologies has led to a growing range of new applications and demands for new alloys and properties. The interest in being able to manufacture HSS by SLM without cracking is therefore increasing. In SLM, it is possible to preheat the base plate to a few hundred degrees Celsius which has been used for HSS and proved successful due to reduced thermal gradients. In this study, the properties of SLM produced high speed steel PEARL Micro®2012 with a carbon content of 0.61 wt.-% have been investigated and compared to those of a forged and rolled PM-HIP counterpart ASP®2012.

Subject Areas

AM; selective laser melting; metal powder; high speed steel; microstructure and hardness

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