Semi-Solid Extrusion of Complex-Shaped Steel Rods Using Ceramic Dies

Abstract:

Isothermal semi-solid extrusion experiments using steel grade X210CrW12 as work material were performed on an industrial forging machine. An improved and up-scaled tool design was applied, based on the concept of self-heating ceramic dies tested in previous laboratory-scale studies and allowing for die preheating temperatures of up to 1400°C. Steel rods of complex cross sectional geometry were formed at low extrusion forces. Shape accuracy of as-formed rods is accurate and metallurgical examination yields no evidence of liquid phase separation. With a view on the intended industrial implementation construction of ceramic tools has to be improved in order to avoid rupture of ceramic parts due to thermo-mechanically induced stresses and to benefit from the advantages inherent to ceramics in metal forming.

• Periodical: Solid State Phenomena (Volumes 141-143)
• Pages: 243-248
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.141-143.243
• Online since: July 2008
• Authors: Simon Muenstermann, Rainer Telle, Frederik Knauf, Gerhard Hirt
• Keywords: Ceramic, Die, Isothermal, Phase Separation, Steel, Thixoextrusion, Tool

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