SURFACE-COATED CUTTING TOOL THE HARD COATING LAYER OF WHICH EXHIBITS EXCELLENT OXIDATION RESISTANCE AND DEPOSITION RESISTANCE

• Main Author: TATSUOKA SHO
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2019
• 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

To provide a coated tool which exhibits excellent chipping resistance and wearing resistance even when used for cutting heat-resistant alloy or the like.SOLUTION: A coated tool is provided with a coating layer with an average layer thickness of 1-20 μm in the base material, where the layer contains crystal grains of NaCl type face-centered cubic structure by 0.60≤x≤0.95, 0≤y≤0.0050 when expressed in (TiAl)(CN), and where, in the inclination angle count distribution with those of inclination angles of normal lines of a {112} face which are in a range of 0-45 degrees with respect to a normal direction of the tool body surface divided into 0.25-degree pitches, and with the number of angles present in each division summed up, a maximum peak is present in a division within a range of 0-10 degrees to have a total number of angles within this range by 35% or more, an average particle width of the crystal grains by 0.1-2.0 μm, an average aspect ratio by 2-10, and a difference between an average of x maximal values and minimal values by 0.03-0.25 in an orientation where periodical composition changes are expressed by of the grains.SELECTED DRAWING: Figure 1 【課題】耐熱合金等の切削に用いても、優れた耐チッピング性、耐摩耗性を発揮する被覆工具を提供。【解決手段】工具基体に平均層厚１〜２０μｍの被覆層を設け、該層は、（Ｔｉ１−ｘＡｌｘ）（ＣｙＮ１−ｙ）で表すと、０．６０≦ｘａｖｇ≦０．９５、０≦ｙａｖｇ≦０．００５０で、ＮａＣｌ型面心立方構造の結晶粒を含み、｛１１２｝面の法線の傾斜角のうち工具基体表面の法線方向に対して０〜４５度の範囲にあるものを０．２５度のピッチに区分して、各区分内に存在する度数を集計した傾斜角度数分布において、０〜１０度の範囲内の区分に最高ピークが存在し、この範囲の度数の合計が全体の３５％以上、該結晶粒の平均粒子幅が０．１〜２．０μｍ、平均アスペクト比が２〜１０、周期的な組成変化が該粒の＜００１＞で表される方位にｘの極大値の平均と極小値の平均の差０．０３〜０．２５となっている被覆工具。【選択図】図１