| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder for molding excellent in flowability and filling stability.SOLUTION: A powder for molding is composed of a raw material powder containing an iron-based powder, an internal lubricant and carbon black. The internal lubricant is composed of a combined lubricant including a fatty acid amide and one or more of a higher alcohol, ester wax, amide wax, and metal soap. The internal lubricant is contained in an amount of 0.2-0.9 mass% in total to 100 mass% of the whole powder for molding, and is mixed with the raw material powder in a completely molten state and stuck on a surface of each constituent particle of the raw material powder. The carbon black (CB) has a particle diameter of ≤50 nm and a specific surface area, measured by BET method, of ≤95 m/g, and is contained in an amount of 0.005-0.05% when the whole powder for molding is 100%, and stuck on a surface of the internal lubricant that has been completely melted and then solidified. |
