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The surface canning thermet make cutting tool null tungsten carbide basis which shows the resistance blade tipping Characteristic where the hard enveloping layer is superior in high-speed
The surface canning thermet make cutting tool null tungsten carbide basis which shows the resistance blade tipping Characteristic where the hard enveloping layer is superior in high-speed
PROBLEM TO BE SOLVED: To provide a surface coated cemented carbide cutting tool having a hard covering layer exhibiting superior chipping resistance in a high speed cutting of a difficult-to-cut material.;SOLUTION: This surface coated cemented carbide cutting tool is (a) constituted of an upper-part layer and a lower-part layer both of which are composed of (Cr, Al, V)N on the surface of a cemented carbide body, and the upper-part layer and the lower-part layer have the layer thicknesses of 0.5-1.5 μm and 2-6 μm respectively; (b) the upper-part layer is provided with an alternate-layer structure of a thin layer A and a thin layer B both of which have the layer thickness of 5-20 nm, the thin layer A is composed of the (Cr, Al, V)N layer satisfying a specific composition formula: [Cr1-(A+B)AlAVB]N, and the thin layer B is composed of the (Cr, Al, V)N layer satisfying a specific composition formula: [Cr1-(C+D)AlCVD]N; and (c) the lower-part layer is provided with a single phase structure, and is formed by vapor-depositing the hard covering layer composed of the (Cr, Al, V)N layer satisfying the specific composition formula: (Cr1-(E+F)AlEVF)N.;COPYRIGHT: (C)2006,JPO&NCIPI
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机译：解决的问题：提供一种表面涂层的硬质合金切削刀具，该刀具具有坚硬的覆盖层，在难切削材料的高速切削中表现出优异的抗崩刃性;解决方案：这种表面涂层的硬质合金切削刀具是（a ）由在硬质合金体的表面上均由（Cr，Al，V）N组成的上层和下层构成，上层和下层具有层厚度分别为0.5-1.5μm和2-6μm; （b）上部层具有薄层A和薄层B的交替层结构，它们的层厚度均为5-20nm，薄层A由（Cr，满足特定组成公式的Al，V）N层：[Cr 1-（A + B） Al A V B ] N，以及薄层B由满足特定组成公式的[Cr，Al，V）N层组成：[Cr 1-（C + D） Al C V < Sub> D ] N; （c）下部层具有单相结构，是通过蒸镀由满足特定组成式的（Cr，Al，V）N层构成的硬质覆盖层而形成的（Cr ＜Sub > 1-（E + F） Al E V F ）N .;版权所有：（C）2006，JPO＆NCIPI
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