Possibilities and constraints of implementing starch consolidated high speed steel in prototyping

Starch consolidation of M3/2 high speed steel powder – influence of microstructure on mechanical properties

“…Starch consolidation (SC) in combination with super solidus liquid phase sintering (SLPS) of gas atomised powder is a recently developed PM technique that has shown promising results in achieving near fully dense as sintered microstructures. [1][2][3][4][5][6][7][8][9] Starch consolidation is an environmentally friendly direct consolidation technique that uses the advantage of morphological changes taking place when starch is heated in an excess of water and as a result no external pressure is needed during the green body fabrication process. Consequently, SC shows a potential to be used in the fabrication of near net shape components made from prealloyed powders difficult to form by ordinary pressing techniques, e.g.…”

“…During the last decade, work on SC of gas atomised HSS powder has been carried out using different HSS grades. [1][2][3][4][5][6][7][8][9] The major part of this work concerns recipe optimisation and process control while relatively little work has been carried out concerning the mechanical and tribological properties of SC HSS microstructures. However, Magalha ˜es et al, Romano et al and Wang et al have evaluated the mechanical properties of SC in combination with SLPS of HSS powder using three point bending test, four point bending test and four point bending fatigue test respectively.…”