CUTTING TOOL FOR DRY MACHINING OF ALUMINUM ALLOY

摘要

PROBLEM TO BE SOLVED: To provide a cutting tool having a long service life by remarkably suppressing welding from physical and chemical viewpoints when performing dry cutting of soft metal such as an aluminum alloy. SOLUTION: In the cutting tool coated with a diamond film on a surface of a base material, a first streak is formed in parallel to a cutting direction or in a direction having an angle formed with the parallel direction of≤20°on a second flank of a cutting edge formed on a base material, ruggedness is provided along the first streak on the diamond film coated on the second flank, and diamond crystal particles forming the diamond film are polished to have curved surfaces. A second streak is formed in parallel to a direction in which chips flow at the time of the machining or in a direction having an angle formed with the parallel direction of≤20°on a rake face of the cutting edge. Ruggedness is provided along the second streak on the diamond film coated on the rake face. A coefficient of friction on a surface of the diamond film having the ruggedness is made less than 0.3. COPYRIGHT: (C)2007,JPO&INPIT