Powder material for additive manufacturing and method for manufacturing powder material for additive manufacturing

Abstract

To provide a lamination molding powder material showing high fluidity even if an oxide film formed on a surface of each metal particle is thin, and a production method capable of obtaining the lamination molding powder material.SOLUTION: A lamination molding powder material is composed of particles of an Fe-based alloy. Provided that a thickness of an oxide film in a surface of each particle is defined as d[nm], and, in a Raman spectrum, regarding a peak A having a peak top in an area A with a Raman shift of 657.5 to 677.5 cm-1, an integrated intensity in the area A is defined as IA, regarding a peak B having a peak top in an area B with a Raman shift of 1,309 to 1,329 cm-1, an integrated intensity IB in the area B is defined as IB and, regarding an intensity ratio IB / IA of the peak B with respect to the peak A is defined as a peak intensity ratio I, d≤15 and I / d≤0.025 are satisfied. Also, a production method has a process in which the particles of the Fe-based alloy are produced by a gas atomization method, and further, heating is executed in a vacuum to form an oxide film on each surface.SELECTED DRAWING: Figure 1

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