HARD COATING HAVING EXCELLENT ABRASION RESISTANCE AND TOUGHNESS

• Main Authors: PAKR JE-HUN, AHN SEUNG-SU, PARK SEONG-MO, GWON JIN-HAN, AHN SUN-YONG, KIM BEOM-SIK, KIM KYOUNG-IL
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2020
• Subjects: 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; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The purpose of the present invention is to provide a hard coating having improved abrasion resistance and toughness, formed by a PVD method, and comprising a first hard layer and a second layer, wherein: the first hard layer has a thickness of 0.1-3.0 [mu]m, is made of Ti<1-a>AlaN (0.3<=a<=0.7) and has a single phase structure; the second hard layer has a thickness of 0.5-10 [mu]m and is made of Ti<1-a-b>AlaMebN (0.3<=a<=0.7, 0<=b<=0.05; Me is one or more selected from V, Zr, Si, Nb, Cr, Mo, Hf, Ta and W); the ratio ([200]/[111]) of the intensity of [200] peak to the intensity of [111] peak is1.5 or more in XRD phase analysis and preferred growth occurs in the direction [200]; the [200] peak is located at 42.7-44.6 degrees and is simultaneously composed of three phases; the [111] peak islocated at 37.0-38.5 degrees and is simultaneously composed of three phases; and, when a peak having the highest intensity among peaks relating to the three phases is a main peak and the remaining peaks are side peaks, the rat