METHOD FOR FORMING HARD COATING LAYER ACHIEVING EXCELLENT CHIPPING RESISTANCE IN HIGH SPEED TOOTH CUTTING WORK ON SURFACE OF SOLID TOOTH CUTTING TOOL OF CEMENTED CARBIDE ALLOY

摘要

PROBLEM TO BE SOLVED: To provide a method for forming a hard coating layer achieving excellent chipping resistance in high speed tooth cutting work on the surface of a solid tooth cutting tool of cemented carbide alloy.;SOLUTION: A tool is installed on a rotary table which rotates and revolves in an arc ion plating. A nitrogen gas atmosphere is set in the device. Between a cathode electrode of Al-Ti alloy and a cathode electrode of It-Al alloy, and anode electrodes respectively provided in parallel with the cathode electrodes, that are disposed to face each other having the rotary table inside, arc discharge is generated. The hard coating layer is thus physically deposited on the surface of the tool in a total average layer thickness of 1-15 μm in such a way that Al-highest inclusion points and Al-lowest inclusion points exist alternately and repeatedly at a prescribed interval in a thickness direction.;COPYRIGHT: (C)2003,JPO