Preparation and Property of Foamed Iron by Pore-Forming Agent Method
In this paper,a new pore-making agent Na2S2O3·5H2O was selected to prepare foam-based iron with pore sizes of 2 mm,3 mm and 4 mm and porosity of 60％and 70％,respectively.The effects of different parameters of foam-based iron on pore struc-ture and mechanical properties were studied.The results show that the foamed iron prepared by the new pore-making agent Na2S2O3·5H2O has a controllable structure.The pore size,porosity and sintering temperature all have different effects on the properties of foam-based iron.When the pore size is 2 mm,the porosity is 60％and the sintering temperature is 1 150 ℃,the best energy absorption and mechanical properties are obtained.
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