Manufacturing method of metal product and metal product

A method of manufacturing a metal product obtained by pressure-molding metal powders into a given configuration, and thereafter fusion-bonding particles of this molded metal powders together by sintering, comprising steps of:

• producing spherical particulate metal powders,
• producing random flaky metal fine powders having a smaller particle size than the spherical particulate metal powders by fracturing a metal fracture material by means of high-velocity gas swirling flow of jet mill,
• producing a mixture material by dispersing the flaky metal fine powders as a sub-material in spaces among the spherical particulate metal powders as a main material, so that a mixing ratio of the sub-material to the main material does not exceed 50%,
• pressure-molding the mixture material using a metal mold, wherein the spherical particulate metal powders retain a spherical shape, and
• sintering the press-molded mixture material so that a framework structure having a three-dimensional network or a lattice shape is formed by fusion-bonding particles of the spherical particulate metal powders together, and air gaps in the framework structure are filled up with the random flaky metal fine powders.