フェライト系PMステンレス鋼の磁気特性に及ぼす残留気孔の影響 Effect of Residual Pores on Magnetic Properties of PM Ferritic Stainless Steels
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.<BR>The results were summarized as follows:<BR>(1) The magnetic properties are more or less sensitive to powder particle size, sintering temperature and time of powder compacts.<BR>(2) Magnetic induction(B<SUB>10</SUB>)behaves as well as electrical resistivity (ρ), almost only depending on sintered density in apparence.<BR>(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.<BR>(4) Coersive force (H<SUB>c</SUB>) is also changed by powder particle size and sintering conditions for a given sintered density, especially due to crystal grain size.<BR>(5) Tensile properties are not largely influenced by pore morphologies, probably because of stress relaxation rising near by residual pores.
粉体および粉末冶金 45(7), 685-691, 1998-07-15
Japan Society of Powder and Powder Metallurgy