HARD COATING FILM FOR CUTTING TOOLS

• Main Authors: AHN SEUNG SU, JO YEONG JU, GWON JIN HAN, PARK JE HUN, KIM HYUNG JIN
• Format: Patent
• Language: English; Korean
• Published: 05.04.2024
• Subjects: BORING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MILLING; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TURNING

본 발명은 내용착성 및 내마모성이 우수한 경질피막 절삭공구를 제공하는 것을 목적으로 한다. 상기와 같은 목적을 달성하기 위해, 본 발명에서 제공하는 절삭공구는 경질 피막을 가지고, 상기 경질 피막은, 상기 경질 피막의 인선으로부터 레이크면 방향으로 100㎛이내 범위에서 표면 거칠기를 측정할 때 거시적인 표면 조도인 제1 거시조도(macro_SaR1)는 상기 인선으로부터 레이크면 방향으로 100㎛밖에서 표면 거칠기를 측정할 때 거시적인 표면 조도인 제2 거시조도(macro_SaR2) 보다 작고, 상기 인선으로부터 레이크면 방향으로 100㎛이내 범위에서 표면 거칠기를 측정할 때 미시적인 표면 조도인 제1 미시조도(micro_SaR1)는 상기 인선으로부터 레이크면 방향으로 100㎛밖에서 표면 거칠기를 측정할 때 미시적인 표면 조도인 제2 미시조도(micro_SaR2) 보다 작고, 상기 인선으로부터 플랭크면 방향으로 100㎛이내 범위에서 표면 거칠기를 측정할 때 거시적인 표면 조도인 제3 거시조도(macro_SaF1)는 상기 인선으로부터 레이크면 방향으로 100㎛밖에서 표면 거칠기를 측정할 때 거시적인 표면 조도인 제4 거시조도(macro_SaF2) 보다 작고, 상기 인선으로부터 플랭크면 방향으로 100㎛이내 범위에서 표면 거칠기를 측정할 때 미시적인 표면 조도인 제3 미시조도(micro_SaF1)는 상기 인선으로부터 레이크면 방향으로 100㎛밖에서 표면 거칠기를 측정할 때 미시적인 표면 조도인 제4 미시조도(micro_SaF2) 보다 작을 수 있다. The objective of the present invention is to provide a hard film-coated cutting tool having excellent welding resistance and wear resistance. In order to achieve the above objective, the cutting tool provided by the present invention has a hard coating film, in which: a first macroscopic roughness (macro_SaR1, which is a macroscopic surface roughness when the surface roughness of the hard coating film is measured within 100㎛ in the direction of the rake surface from the cutting edge of the hard coating film, may be less than a second macroscopic roughness (macro_SaR2, which is a macroscopic surface roughness when the surface roughness is measured outside 100㎛ in the direction of the rake surface from the cutting edge; a first microscopic roughness (micro_SaR1), which is a microscopic surface roughness when the surface roughness is measured within 100㎛ in the direction of the rake surface from the cutting edge, may be less than a second microscopic roughness (micro_SaR2, which is a microscopic surface roughness when the surface roughness is measured outside 100㎛ in the direction of the rake surface from the cutting edge; a third macroscopic roughness (macro_SaF1, which is a macroscopic surface roughness when the surface roughness is measured within 100㎛ from the cutting edge in the direction of the flank surface, may be less than a fourth macroscopic roughness ((macro_SaF2), which is a macroscopic surface roughness when the surface roughness is measured outside 100㎛ from the cutting edge in the direction of the rake surface; and a third microscopic roughness (micro_SaF1), which is a microscopic surface roughness when the surface roughness is measured within 100㎛ from the cutting edge in the direction of the flank surface, may be less than a fourth microscopic roughness (micro_SaF2, which is a microscopic surface roughness when the surface roughness is measured outside 100㎛ from the cutting edge in the direction of the rake surface.