Experimental Study on Drying Process of Green Body in Gelcasting of Metal Part

Hui Huang Liang; Fei Wang; Kai Yong Jiang

doi:10.4028/www.scientific.net/AMM.217-219.1894

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 217-219Experimental Study on Drying Process of Green Body...

Experimental Study on Drying Process of Green Body in Gelcasting of Metal Part

Abstract:

In this paper, gelatin was selected as binder, sodium alginate as dispersant. The slurries with low viscosity and high solid loading were prepared by mixing two types of 316L stainless steel powders with different particle sizes in proper mass ratios. The freeze drying process was adopted to treat the wet green body. The results show that the slurry with a solid loading as high as 58 vol.% can be obtained by mixing 316L stainless steel powders with mass ratio of fine particles to coarse as 4:6, which has better fluidity and densification. The viscosity of the slurry is less than 1Pa•s. After the freeze drying process, the bending strength of green body reaches 11.15MPa, the drying shrinkage is decreased to 0.44%, and the generation of crack can be prevented. The study results provide some helpful references for further research in rapid manufacturing of complex metal part.

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Periodical:

Applied Mechanics and Materials (Volumes 217-219)

Pages:

1894-1898

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.217-219.1894

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Online since:

November 2012

Authors:

Hui Huang Liang, Fei Wang, Kai Yong Jiang

Keywords:

316L Stainless Steel, Freeze Drying, Gelcasting, Thin-Wall Structure

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