Surface coating cutting tool with hard coating layer playing excellent fracture resistance
A cutting tool and surface coating technology, which is applied in the field of surface coating cutting tools, can solve the problems of defective tool life and easy chipping
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[0064] Prepare WC powder, TiC powder, ZrC powder, VC powder, TaC powder, NbC powder, Cr, all having an average particle size of 1~3μm 3 C 2 Powder, TiN powder, and Co powder are used as raw material powders. These raw material powders are mixed into the composition shown in Table 1, and then wax is added and ball-milled in acetone for 24 hours. After drying under reduced pressure, it is pressed into a prescribed shape at 98 MPa. The compact is vacuum sintered in a vacuum of 5 Pa and maintained at a specified temperature in the range of 1370 to 1470°C for 1 hour. After sintering, the cutting edge is sharpened with R: 0.07mm Through processing, WC-based cemented carbide tool bases A to E having the blade shape specified in ISO·CNMG120412 were respectively manufactured.
[0065] In addition, prepare TiCN (TiC / TiN=50 / 50 in terms of mass ratio) powder, Mo with an average particle diameter of 0.5-2μm. 2 C powder, ZrC powder, NbC powder, TaC powder, WC powder, Co powder...
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