Coated cutting tool with excellent chipping resistance and wear resistance

Abstract

In the surface-coated cutting tool, the hard coating layer includes at least an (Al, Cr, Si, Cu)N layer, which is composed of a main phase, CrSi-rich particles and Al-rich particles dispersed in the main phase. By (Al 1‑α‑β‑γ Cr α Si β Cu γ ) 1‑x N x In the case of the composition of the main phase, CrSi-rich particles and Al-rich particles, the main phase satisfies 0.15≤α≤0.40, 0.05≤β≤0.20, 0.005≤γ≤0.05, 0.45≤x≤0.60, and the The CrSi-rich particles satisfy 0.20≤α≤0.55, 0.20≤β≤0.55, 0≤γ≤0.10, 0.02≤x≤0.35, and the Al-rich particles satisfy 0.10≤α≤0.25, 0.05≤β≤0.25, 0≤γ≤ 0.10, 0.02≤x≤0.35, where α, β, γ, and x are atomic ratios, and the area ratio of CrSi-rich particles in the upper layer cross section when observing particles with a long diameter of 100 nm or more in the upper layer cross section 0.20 area % to 2.0 area %, and the area ratio of the Al-rich particles in the cross section of the upper layer is 0.50 area % to 3.0 area %.

Description

technical field

[0001] The present invention relates to a surface-coated cutting tool (hereinafter referred to as a coated tool) in which a hard coating exhibits excellent chipping resistance and wear resistance during cutting of high-hardness materials such as hardened steel. And in the long-term use to play an excellent cutting performance.

[0002] This application claims priority based on Patent Application No. 2016-047919 for which it applied in Japan on March 11, 2016, and uses the content here. Background technique

[0003] In general, as a cladding tool, there are known indexable inserts that are detachably mounted on the front end of a turning tool for use in turning or planing of workpiece materials such as various steels or cast iron, and inserts for the workpiece materials. Drills or small drills used in drilling and cutting, end mills used in face cutting or grooving of the workpiece material, step surface processing, etc., gear cutting of the tooth profile of ...

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