The effect of different preparation methods on magnetic permeability of 316L stainless steel powder
The experiment selected water atomization,gas atomization and centrifugal atomization to prepare 316L stainless steel powder,the magnetic conductivity of different kinds of powder grading was tested,the micro-structure was characterized by SEM,EDS and XRD,and the effect of the preparation method on the magnetic conductivity of 316L stainless steel powder and the causes were investigated. The study shows that the 316L stainless steel powders prepared by atomization have magnetic conductivity,and the reason for magnetic conduc-tivity is the existence of high temperature δ ferrite phase in the powder. The finer the particle size of the powder,the faster the cooling speed,the more cytocrystalline content,the higher the 8 ferrite content,and the stronger the corresponding magnetic conductivity. The magnetic permeability of the powder prepared by water atomization is the highest,of the centrifugal atomization is centered,and of the powder prepared by gas atomization is slightly lower. The cooling capacity of centrifugal atomization is higher than gas atomization.
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