HARD FILM-COATED CUTTING TOOL

• Main Authors: KIM, Kyoung Il, AHN, Seong Yeon, GWON, Jin Han, PARK, Je Hun, KIM, Hyung Jin, JO, Yeong Ju, AHN, Seung Su
• Format: Patent
• Language: English; French; Korean
• Published: 21.09.2023
• 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

The objective of the present invention is to provide a hard film-coated cutting tool having excellent welding resistance and wear resistance. To achieve the objective as above, the hard film-coated cutting tool according to the present invention comprises: a hard base material; and a hard film formed on the hard base material, wherein: assuming that, at a rake surface of the hard film, a colorimetric diffusion reflectance value is LSCER and a total reflectance value is LSCIR, the relationship of 0.65≤LSCER/LSCIR≤0.85 is satisfied, and when surface roughness is measured on the rake surface of the hard film within the range of 100 ㎛ from the edge, an arithmetic average height SaR is within the range of 0.2 ㎛≤SaR≤0.5 ㎛; and assuming that, at a flank surface of the hard film, a colorimetric diffusion reflectance value is LSCEF and a total reflectance value is LSCIF, the relationship of LSCEF/LSCIF≥0.9 is satisfied, and when surface roughness is measured on the flank surface of the hard film within the range of 100 ㎛ from the edge, an arithmetic average height SaF is within the range of 0.15 ㎛≤SaF≤0.4 ㎛. L'objectif de la présente invention est de fournir un outil de coupe revêtu d'un film dur ayant d'excellentes résistance au soudage et résistance à l'usure. Pour atteindre l'objectif ci-dessus, l'outil de coupe revêtu d'un film dur de la présente invention comprend : un matériau de base dur ; et un film dur formé sur le matériau de base dur. En supposant, au niveau d'une surface d'attaque du film dur, qu'une valeur colorimétrique de réflectance diffuse est LSCER et qu'une valeur de réflectance totale est LSCIR, la relation 0,65 ≤ LSCER / LSCIR ≤ 0,85 est satisfaite, et lorsque la rugosité de surface est mesurée sur la surface d'attaque du film dur dans la plage de 100 µm à partir du bord, une hauteur moyenne arithmétique SaR est comprise dans la plage de 0,2 ㎛ ≤ SaR ≤ 0,5 ㎛ ; et en supposant, au niveau d'une surface de dépouille du film dur, qu'une valeur colorimétrique de réflectance diffuse est LSCEF et qu'une valeur de réflectance totale est LSCIF, la relation LSCEF / LSCIF ≥ 0,9 est satisfaite, et lorsque la rugosité de surface est mesurée sur la surface de dépouille du film dur dans la plage de 100 µm à partir du bord, une hauteur moyenne arithmétique SaF est comprise dans la plage de 0,15 ㎛ ≤ SaF ≤ 0,4 ㎛. 본 발명은 내용착성 및 내마모성이 우수한 경질피막 절삭공구를 제공하는 것을 목적으로 한다. 상기와 같은 목적을 달성하기 위해, 본 발명에 따른 경질피막 절삭공구는, 경질모재와 상기 경질모재 상에 형성되는 경질피막을 포함하고, 상기 경질피막의 레이크면에서의 색차계 확산반사값을 LSCER, 전체반사값을 LSCIR이라 할 때, 0.65≤LSCER/LSCIR≤0.85를 만족하고, 상기 경질피막의 레이크면에서 인선으로부터 100㎛이내 범위에서 표면 거칠기를 측정할 때 산술평균높이 SaR은 0.2㎛≤SaR≤0.5㎛ 범위이고, 상기 경질피막의 플랭크면에서의 색차계 확산반사값을 LSCEF, 전체반사값을 LSCIF이라할 때, LSCEF/LSCIF≥0.9를 만족하고, 상기 경질피막의 플랭크면에서 상기 인선으로부터 100㎛이내 범위에서 표면 거칠기를 측정할 때 산술평균높이 SaF는, 0.15㎛≤SaF≤0.4㎛ 범위일 수 있다.