Abstract:Two FeCrNi spherules were discovered in the main hole of CCSD. They are about 200 μm in size. Their chemical compositions are Fe 71.07%~73.68%, Cr14.55%~16.79% and Ni 9.91%~11.47%,totally 98.2%~99.65%.The spherules contain oxide inclusions, with elements of Cr, Mn, Ti, Al, Fe, Si, and O. X-ray diffraction analysis shows that the spherules, having molecular formulaof Fe0.74Cr0.16Ni0.10,is polycrystalline and of the cubic system, with space group of Fm3m, cell parameter of a =0.360?3 nm, Z=4 and density of 7.828 g/cm3. The polished faces of the spherules are white gray in color and have metallic luster. The hardness of the spherules is about 4.026Hm. The reflectance of spherule is 56%~63%, with S546 of 56%. The spherules were probably produced by cooling of melted FeCrNi metallic droplets which trapped oxygen and was thus oxidized.