CUTTING TOOL OF SURFACE-COATED CERMET WITH HARD COATING LAYER HAVING EXCELLENT THERMAL SHOCK RESISTANCE,申请号JP20020349649-传众专利搜索

CUTTING TOOL OF SURFACE-COATED CERMET WITH HARD COATING LAYER HAVING EXCELLENT THERMAL SHOCK RESISTANCE

申请公布号：JP2004188500(A)

申请号：JP20020349649

申请日期：2002.12.02

申请公布日期：2004.07.08

申请人：

MITSUBISHI MATERIALS CORP

发明人：UEDA TOSHIAKI;OSHIKA TAKATOSHI

分类号：B23C5/16;B23B27/14;C23C16/30;(IPC1-7):B23C5/16

主分类号：B23C5/16

摘要：PROBLEM TO BE SOLVED: To provide a cutting tool of surface-coated cermet with a hard coating layer having excellent thermal shock resistance. SOLUTION: This cutting tool of surface-coated cermet is manufactured by forming the hard coating layer on the surface of a tool base body composed of WC-based cemented carbide or TiCN-based cermet. The hard coating layer is composed of (a) a primer layer comprising a Ti compound layer composed of one layer or a lamination of two or more layers among a TiC layer, TiN layer, a TiCN layer, a TiCO layer, and a TiCNO layer formed by deposition, having average thickness of 3-20μm, and (b) an upper layer comprising a composite doubleα-type Al<SB>2</SB>O<SB>3</SB>layer composed of a lower layer of a heat transformedα-type Al<SB>2</SB>O<SB>3</SB>layer havingα-type crystal structure formed by applying heat-transformation treatment to Al<SB>2</SB>O<SB>3</SB>having aκ-type crystal structure as formed by deposition, having texture in which transformation cracks generated by the heat transformation treatment are dispersed and distributed, and having average layer thickness of 3-15μm, and an upper layer of depositedα-type Al<SB>2</SB>O<SB>3</SB>layer of anα-type crystal structure formed by deposition, and having average layer thickness of 0.5-2μm. COPYRIGHT: (C)2004,JPO&NCIPI