| 摘要 |
PURPOSE:To provide a highly harder blade edge, strengthen joining of a blade root part and a blade part, and realize the long service life and high reliability by changing a composition continuously toward the blade edge from the blade root side in the blade part. CONSTITUTION:Powder injection molding is used to mold at least a blade part 3, and a molding material adjusted in response to a composition on the blade root part 2 side and a molding material adjusted in response to a composition at a blade edge are filled simultaneously in a single mold, and a mixed part of both molding materials is formed in the mold. Thereby, a change necessary for a continuous change in a composition in the blade part 3 is given. In this case, the blade root part 2 and the blade part 3 can be molded simultaneously, and afterwards, it is baked and sintered, and is formed as a cutter. Needless to say, only the blade part 3 can be molded. Afterwards, it is baked and sintered, and when it is joined to the blade root part 2 manufactured separately, a cutter 1 can be also formed. |
