Abstract
A fundamental study was made mainly on the magnetic properties of the two PM ferritic stainless steels with some residual pores. In this case, powder particle size and sintering conditions (1373-1573K×20-240min) were employed as parameters to the residual pore morphologies of sintered materials.
The results were summarized as follows:
(1) The magnetic properties are more or less sensitive to powder particle size, sintering temperature and time of powder compacts.
(2) Magnetic induction(B10)behaves as well as electrical resistivity (ρ), almost only depending on sintered density in apparence.
(3) Max.permeability (μm) is fairly changed by powder particle size and sintering conditions for a given sintered density, due to pore shape and crystal grain size.
(4) Coersive force (Hc) is also changed by powder particle size and sintering conditions for a given sintered density, especially due to crystal grain size.
(5) Tensile properties are not largely influenced by pore morphologies, probably because of stress relaxation rising near by residual pores.
