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Abstract

An additive manufacturing product including a steel matrix and ceramic particles dispersed in the steel matrix. The steel matrix has a chemical composition containing, in mass %, C: 0.030% or more and 0.800% or less, Si: 0.01% or more and 2.50% or less, Mn: 0.10% or more and 8.00% or less, P: 0.100% or less, S: 0.0200% or less, Al: 0.100% or less, N: 0.1000% or less, and O: 0.5000% or less, with the balance being Fe and inevitable impurity. The steel matrix has a steel microstructure where area fraction of pores is 0.50% or less, area fraction of martensite in a region excluding pores is 90% or more, average aspect ratio of prior austenite grains is 1.5 or more, and L_HA/L is 2.0 or more. Melting point of the ceramic particles is 2000° C. or more.

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First Claim