[SIS13] Circular Economy and Sustainability in PM

[15E-SIS13-06] Direct Recycling of Tool Steel Swarf Using Field Assisted Sintering

*M. Keszler¹, F. Großwendt², A.-C. Assmann³, O. Guillon¹, A. Röttger⁴, S. Weber², M. Bram^{1, 2} (1.Forschungszentrum Jülich, Germany, 2.Ruhr-Universität Bochum, Germany, 3.RWTH Aachen University, Germany, 4.Bergische Universität Wuppertal, Germany)

Keywords:tool steel, field assisted sintering, circular economy, direct recycling, high speed steel

Steel swarf generated from the machining and polishing of steel parts can be recovered, cleaned, milled, and magnetically separated into a powder suitable for processing via field assisted sintering. Field assisted sintering, when combined with thermal post-treatments, has the potential to directly generate new parts, such as cutting disks, from this recovered swarf. The attractive features of this technique include the avoidance of the high energy cost of re-melting, the direct utilization of powder with unconventional morphology, and the ability of upcycling by generating metal matrix composites. The possibilities of this technique are explored using a high carbon, high chromium steel swarf (AISI D2) and a high speed steel (AISI T15), both produced industrially and recovered for direct recycling to contribute to a circular economy.