Effect of Delubricating Conditions on Dimensional Change in Sintering of Fe-Based Powder Compacts

Autor:	Nobuyasu Kawai, Jinsuke Takata
Rok vydání:	1994
Předmět:	Materials science Mechanical Engineering Diffusion Metallurgy Metals and Alloys chemistry.chemical_element Sintering Endothermic gas Copper Industrial and Manufacturing Engineering Atmosphere Dew point chemistry Materials Chemistry Carbon Shrinkage
Zdroj:	Journal of the Japan Society of Powder and Powder Metallurgy. 41:1150-1156
ISSN:	1880-9014 0532-8799
DOI:	10.2497/jjspm.41.1150
Popis:	The influence of delubricating conditions on dimensional change of the compacts of the system Fe-2wt%.Cu-0.8wty.C-0.75wt%.Zn-st was examined under an atmosphere of endothermic gas. An abnormal expansion, which increases under slower heat pattern and atmosphere of lower dew point, occurred above about 500°C. As this expansion becomes larger, copper growth decreases, the shrinkage becomes larger and carbon content after sintering becomes higher.The diffusion of carbon is greatly influenced by delubricating conditions but that of copper is little. The delubrication in Ar, N2, H2 and dissociated ammonia atmosphere makes the sintering behaviors and sintered properties stable. In the case of endothermic gas, the similar tendency is observed at the rapid delubrication under the high dew point atmosphere.
Databáze:	OpenAIRE
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