IRON-BASED SINTERED BODY

摘要

An iron-based sintered body containing composite oxide particles in a metal matrix, wherein when a large field of view having an area of 176 μm × 226 μm is taken in a cross-section of the iron-based sintered body, and the large field of view is viewed as a 25-square (5 × 5) grid in which the area of each square is 35.2 μm × 45.2 μm, the average circle equivalent diameter of the composite oxide particles is 0.3 μm to 2.5 μm, a value obtained by dividing the total area of the 25-square grid by the total number of composite oxides present in the the 25-square grid is 10 μm2/composite oxide to 1000 μm2/composite oxide, and the number of squares among the 25-square grid in which composite oxide particles are not present is 4 or less.