| 摘要 |
PROBLEM TO BE SOLVED: To keep the adhering property of a graphite powder (or graphite powder and an auxiliary raw material) in a mixed powder and high flowability, as a raw material powder.SOLUTION: A powder mixture of the present invention is characterized in that: in an iron powder or an iron-based alloy powder 1, a graphite powder 2 is adhered to a surface of the iron powder or the iron-based alloy powder by a binding agent composed of a polyolefin-based wax 4; and the iron powder or the iron-based alloy powder 1 is mixed with a negatively-charged powder 5 and a lubricant powder 6 for compacting, which consist of an iron powder or an iron-based alloy powder subjected to negatively charging treatment. Thus the graphite powder 2 in a mixed powder can be securely prevented from causing segregation, and simultaneously high flowability can be obtained. |
