ステンレス粉射出成形体の焼結に及ぼす脱脂状態の影響

概要

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The debinding process and the relationship between the binder removal(%)and the sinterability of injection molded compacts were investigated. Two types of SUS316L powders having different particle sizes were used. The main results obtained were as follows.<BR>1) The binder removal(%) of an injection molded compact was proportional to its specific surface area when debound under the same conditions in the temperature range where debinding was accomplished mainly by thermal decomposition.<BR>2) The relative density of sintered compact increased with increasing the binder removal(%) when sintered at 1270°C. On the other hand, sintered at 1310°C, high density(>94%) was achieved even in the compacts of low binder removal.<BR>3) The sintered structure of the compacts of very low binder removal(%) showed remarkable growth of crystal grains and residual pores, and many precipitates of carbide near the boundaries.<BR>4) The desirable binder removal (%) in the debinding process was estimated at 90-94%, by considering sintering behaviors of the compacts.
社団法人粉体粉末冶金協会の論文