Browsing by Subject "cast iron"

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DIGITAL MODEL GENERATION STRATEGY FOR PRINTING MINIATURIZED REPLICA OF HISTORICAL CAST IRON OBJECTS – A USE CASE STUDY
(University of Texas at Austin, 2023) Borstell, D.; Friedhofen, B.; Kunz, D.
The Cast Iron Museum at Sayn (Germany) hosts a wide range of historic cast iron objects ranging from highly detailed fly-size figures to oversize eagles and church bells. Replicating the historical cast iron, i.e. free formed objects, as miniaturized 3D prints for a new exhibition requires scanning to create the digital model. High quality of the digital model is a fundamental prerequisite for the production of the miniaturized 3D print. The influence of software selection and settings during data preparation from point cloud, mesh and finally solid is highlighted. Printing process selection is the final step in achieving the required print quality. A scanning and model generation strategy is developed and described using several exemplary objects from the Sayn Museum. The final print quality resulting from the selected scanning process is evaluated.
Study of Selective Laser Melting for Bonding of 304L Stainless Steel to Grey Cast Iron
(University of Texas at Austin, 2017) Thomas, Baily; Sutton, Austin; Leu, Ming C.
While cast iron is widely used in industry, a major limitation is the weldability of a dissimilar material onto cast iron due to hot cracking as a result of lack of ductility from graphite flakes. Consequently, a significant amount of preheat is often employed to reduce the cooling rate in the fusion zone, which, however, may lead to distortion of the welded parts. A potential remedy could be the Selective Laser Melting (SLM) process, where only small melt pools are created and thus the overall energy input is reduced. The present paper describes an investigation of the SLM process to join 304L stainless steel with cast iron. In this study, 304L stainless steel particles ranging from 15-45 μm in size were melted on a grey cast iron substrate by the SLM process. Multiple sets of parameter values were chosen to test different energy densities on the tensile strength of the bond created. Subsequent characterization of the bonded area included energy dispersive spectroscopy (EDS) mapping for obtaining insight into the elemental diffusion, and metallography for visualization of the microstructure. A range of energy densities was identified for purposes of eliminating bond delamination and maximizing mechanical strength.