| 摘要 |
PURPOSE:To obtain a Ti cutter having nonmagnetic properties, having high corrosion resistance, ductility and bending strength, easily capable of regrinding and having good cutting quality by using a composite Ti alloy obtd. by incorporating Ti as a matrix with hard substances as a cutter and joining it with Ti as a base metal. CONSTITUTION:By weight, 30 to 90% of Ti powder and the hard fine powder of the carbides, nitrides, other oxides or the like of Ti, Cr, W, V, Nb, Zr, etc., are mixed and sealed into a capsule made of a thin steel sheet, and this mixture is subjected to hot isostatic pressing treatment and is furthermore hot-worked by not rolling or the like, and after that, the capsule is removed to manufacture a composite Ti alloy 1 constituted of a Ti matrix 2 and hard fine grains 3. This composite Ti alloy is clad with a Ti sheet 5, and after the welding of its circumference, hot rolling and, if required, also cold rolling are executed to manufacture a multiple layered Ti material 4. A cutting blade 9 is formed on the above multilayered Ti material 4 to manufacture a Ti cutter 6 having a blade 10 with good cutting quality and in which the composite Ti alloy 1 is used as a cutting metal 7 as well as the Ti material 4 is used as a base metal material 8. Or, the cutter may be manufactured by cladding the steel part of the Ti base metal with the above multilayered Ti alloy by welding. |
