Abstract
Using electrolytic and reduced iron powders which have been generally used in the powder metallurgy industry in Japan, studies were carried out on physical or mechanical properties of green and sintered compacts which were made by single pressing or repressing methods under the various conditions of pressing and sintering. Special attention was given to be sure that the samples had almost the same particle distribution.
Microscopic examination of structures of sintered compacts were also performed and found that extremely small pores included in sintered compacts of reduced powders, made by a single pressing method, decreased remarkably in number through the use of a reprssing operation.
Further experiments were made on carburization of sintered iron in a gas atmosphere which was produced by converting a town gas through charcoals. One of the findings was that depth of the carburized case of the sintered iron was influenced by the compacting pressure, carburizing temperature and time, and the most effective factor of the three was the compacting pressure.
