Surface coated high-speed tool steel-made gear cutting tool having hard coating layer exhibiting excellent wear resistance in high-speed gear cutting of alloy steel

合金鋼の高速歯切加工で硬質被覆層がすぐれた耐摩耗性を発揮する表面被覆高速度工具鋼製歯切工具

Abstract

PROBLEM TO BE SOLVED: To provide a surface coated high-speed tool steel-made gear cutting tool having a hard coating layer exhibiting excellent wear resistance in high-speed gear cutting of alloy steel. SOLUTION: In this surface coated high-speed tool steel-made gear cutting tool, a hard coating layer is formed on the surface of a high-speed tool steel base by vapor deposition. The hard coating layer is composed of (a) an upper layer and a lower layer, both of which are formed of (Ti, Al, Cr) N, the upper layer has the average layer thickness ranging from 0.5 to 1.5 μm, and the lower layer has the average layer thickness ranging from 2 to 6 μm. (b) The upper layer has an alternately stacking structure in which a thin layer A and a thin layer B respectively having the average layer thickness ranging from 5 to 20 nm are stacked. The thin layer A is formed of (Ti, Al, Cr) N layer satisfying a composition formula: [Ti 1-(A+B) Al A Cr B ] N, and the thin layer B is formed of (Ti, Al, Cr) N layer satisfying a composition formula: [Ti 1-(C+D) Al C Cr D ] N. (c) The lower layer has a single phase structure and it is formed of (Ti, Al, Cr) N layer satisfying a composition formula: [Ti 1-(E+F) Al E Cr F ] N. COPYRIGHT: (C)2007,JPO&INPIT
【課題】合金鋼の高速歯切加工で硬質被覆層がすぐれた耐摩耗性を発揮する表面被覆高速度工具鋼製歯切工具を提供する。 【解決手段】表面被覆高速度工具鋼製歯切工具が、高速度工具鋼基体の表面に、(a)いずれも(Ti,Al,Cr)Nからなる上部層と下部層で構成し、前記上部層は0.5〜1.5μm、前記下部層は2〜6μmの層厚をそれぞれ有し、(b)上記上部層は、いずれも一層平均層厚がそれぞれ5〜20nmの薄層Aと薄層Bの交互積層構造を有し、上記薄層Aは、組成式:[Ti 1-(A+B) Al A Cr B ]Nを満足する(Ti,Al,Cr)N層、上記薄層Bは、組成式:[Ti 1-(C+D) Al C Cr D ]Nを満足する(Ti,Al,Cr)N層、からなり、(c)上記下部層は、単一相構造を有し、組成式:[Ti 1-(E+F) Al E Cr F ]Nを満足する(Ti,Al,Cr)N層、からなる硬質被覆層を蒸着形成してなる。 【選択図】なし

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    JP-2001254187-ASeptember 18, 2001Hitachi Tool Engineering Ltd, 日立ツール株式会社硬質皮膜被覆部材
    JP-2003071610-AMarch 12, 2003Kobe Steel Ltd, 株式会社神戸製鋼所Hard coating for cutting tool, manufacturing method therefor and target for forming hard coating
    JP-2003340606-ADecember 02, 2003Mitsubishi Materials Corp, Mitsubishi Materials Kobe Tools Corp, 三菱マテリアル株式会社, 三菱マテリアル神戸ツールズ株式会社Surface-covered cemented carbide made cutting tool having hard coated layer to exhibit excellent abrasion resistance in high-speed cutting work
    JP-H08127862-AMay 21, 1996Sumitomo Electric Ind Ltd, 住友電気工業株式会社積層体
    JP-H08134629-AMay 28, 1996Sumitomo Electric Ind Ltd, 住友電気工業株式会社Hyperfine particle laminated film and laminated high hardness material for tool with same
    JP-H08209337-AAugust 13, 1996Hitachi Tool Eng Ltd, 日立ツール株式会社Coated hard alloy

NO-Patent Citations (0)

    Title

Cited By (0)

    Publication numberPublication dateAssigneeTitle