Surface treatment metal powder for laser sintering
AssigneeJX Nippon Mining & Metals Corporation
InventorsHideki FURUSAWA, Kenji SATO, Terumasa MORIYAMA
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Abstract
A surface treatment metal powder having any of the following characteristics is provided as a metal powder that can be suitably used for metal AM and has excellent laser absorbing characteristics: the brightness L* of the surface is 0-50; the color difference ΔEab of the surface is 40 or more; the color difference ΔL of the surface is −35 or less; the color difference Δa of the surface is 20 or less; and the color difference Δb of the surface is 20 or less (when determined on the basis of the object color of a white plate (brightness L*=94.14, color coordinate a*=−0.90, color coordinate b*=0.24)).
Claims24
A surface-treated metal powder, wherein a surface of the surface-treated metal powder has a lightness L* of 0 or more and 50 or less.
A method for producing a laser sintered body, comprising a step of laser-sintering the surface-treated metal powder according to 1 by irradiating the metal powder with laser light to produce a sintered body.
A method for producing a surface-treated metal powder for laser sintering, comprising a step of subjecting a metal powder to a roughening treatment to obtain a roughening-treated metal powder.
A method for producing a surface-treated metal powder for laser sintering, comprising a step of oxidizing the metal powder in an acidic aqueous sulfuric acid solution having a pH of from 3 to 7.
A method for producing a surface-treated metal powder for laser sintering, comprising oxidizing the metal powder in hot water at a temperature of from 40 to 70° C.
Dependencies are inferred from the claim text.