| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.28 ( June 1993 ) Special Issue on Chemicals and New Materials and Construction Materials ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Deformation Behavior of Metal Injection-Molded Compacts During Sintering Keiichi Maruta, Yukio Makiishi, Hiroshi Ohtsubo, Shigeaki Takajo |
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Synopsis : The shape deformation behavior during sintering was measured and correlated to the bonding between particles in injection-molded compacts. Stainless steel powders of different particle size were injection melded and sintered. Sintering shrinkage began at around 1000, and a finer powder promoted sintering. Before sintering shrinkage occurred, residual carbon from the binder was concentrated on the particle surface and contributed to the adherence between particles in a compact. This carbon decreased as a result of the C-O reaction up to 1000. Therefore, the bonding between particles loosened transiently, and shape deformation of the compact occurred during this stage. The promotion of sintering by means of fine powder suppressed this shape deformation. The shape deformation behavior during sintering was simulated by the finite element method, and the result is in good agreement with the experimental results. |
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