Abstract
The effect of alloying composition on the shrinkage behaviour of prealloyed stainless steel powder compacts were examined by the sintering experiment in vacuum at 900 to 1300°C for 1 hr.It is found that the linear shrinkage of prealloyed powder compacts are changed with sintering temperature and specimen composition.Linear shrinkage of ferritic (Fe-Cr) stainless steel is much greater than that of austenitic (Fe-Cr-Ni) stainless steel.Shrinkage behaviour of stainless steel powder compacts mainly depends upon the nickel content in alloy composition and it decreases with increasing nickel content.It is reasonable to consider that the difference in the shrinkage behaviour between austenitic and ferritic stainless steel compacts is mainly due to the difference between the diffusion coefficients of iron in the alpha and gamma phases.
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