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A platform for research: civil engineering, architecture and urbanism
CUTTING TOOL AND MANUFACTURING METHOD OF CUTTING WORKPIECE
PROBLEM TO BE SOLVED: To provide a cutting tool excellent in adhesion and chipping resistance of a coating layer.SOLUTION: A cutting insert 1 comprises a base body 2 composed of a silicon nitride-quality sintered body of including a silicon nitride particle as a main body and a coating layer 3 coated on a surface of the base body 2, and in a cross section vertical to a surface of the base body 2, the silicon nitride particle is composed of a surface particle 4 existing on the outermost surface of the base body 2 and contacting with the coating layer and an inside particle 5 of not contacting with the coating layer 3, and a ratio (w1/w2) of an average particle width w1 parallel to the surface of the base body 2 of the surface particle 4 and an average particle width w2 parallel to the surface of the base body 2 of the inside particle 5, is 0.2-0.6, and a ratio (L1/w1) of the average particle width w1 of the surface particle 4 and an average particle length L1 is 0.1-0.6, and among particles for constituting the coating layer 3, a ratio (w1/d1) of an average particle width d1 parallel to the surface of the base body 2 of a first coating layer 7 for contacting with the base body 2 and an average particle width w1 of the surface particle 4, is 0.8-2.1.SELECTED DRAWING: Figure 1
【課題】被覆層の密着性と耐チッピング性に優れた切削工具を提供する。【解決手段】窒化珪素粒子を主体として含有する窒化珪素質焼結体からなる基体２と、基体２の表面に被覆された被覆層３とを備え、基体２の表面に垂直な断面において、窒化珪素粒子は、基体２の最表面に存在して被覆層と接する表面粒子４と、被覆層３とは接しない内部粒子５とからなり、表面粒子４の基体２の表面に平行な平均粒子幅ｗ１と、内部粒子５の基体２の表面に平行な平均粒子幅ｗ２との比（ｗ１／ｗ２）が０．２〜０．６であり、表面粒子４の平均粒子幅ｗ１と平均粒子長さＬ１との比（Ｌ１／ｗ１）が０．１〜０．６であるとともに、被覆層３を構成する粒子のうち、基体２と接触する第１被覆層７の基体２の表面に平行な平均粒子幅ｄ１と、表面粒子４の平均粒子幅ｗ１との比（ｗ１／ｄ１）が０．８〜２．１の切削インサート１である。【選択図】図１
CUTTING TOOL AND MANUFACTURING METHOD OF CUTTING WORKPIECE
PROBLEM TO BE SOLVED: To provide a cutting tool excellent in adhesion and chipping resistance of a coating layer.SOLUTION: A cutting insert 1 comprises a base body 2 composed of a silicon nitride-quality sintered body of including a silicon nitride particle as a main body and a coating layer 3 coated on a surface of the base body 2, and in a cross section vertical to a surface of the base body 2, the silicon nitride particle is composed of a surface particle 4 existing on the outermost surface of the base body 2 and contacting with the coating layer and an inside particle 5 of not contacting with the coating layer 3, and a ratio (w1/w2) of an average particle width w1 parallel to the surface of the base body 2 of the surface particle 4 and an average particle width w2 parallel to the surface of the base body 2 of the inside particle 5, is 0.2-0.6, and a ratio (L1/w1) of the average particle width w1 of the surface particle 4 and an average particle length L1 is 0.1-0.6, and among particles for constituting the coating layer 3, a ratio (w1/d1) of an average particle width d1 parallel to the surface of the base body 2 of a first coating layer 7 for contacting with the base body 2 and an average particle width w1 of the surface particle 4, is 0.8-2.1.SELECTED DRAWING: Figure 1
【課題】被覆層の密着性と耐チッピング性に優れた切削工具を提供する。【解決手段】窒化珪素粒子を主体として含有する窒化珪素質焼結体からなる基体２と、基体２の表面に被覆された被覆層３とを備え、基体２の表面に垂直な断面において、窒化珪素粒子は、基体２の最表面に存在して被覆層と接する表面粒子４と、被覆層３とは接しない内部粒子５とからなり、表面粒子４の基体２の表面に平行な平均粒子幅ｗ１と、内部粒子５の基体２の表面に平行な平均粒子幅ｗ２との比（ｗ１／ｗ２）が０．２〜０．６であり、表面粒子４の平均粒子幅ｗ１と平均粒子長さＬ１との比（Ｌ１／ｗ１）が０．１〜０．６であるとともに、被覆層３を構成する粒子のうち、基体２と接触する第１被覆層７の基体２の表面に平行な平均粒子幅ｄ１と、表面粒子４の平均粒子幅ｗ１との比（ｗ１／ｄ１）が０．８〜２．１の切削インサート１である。【選択図】図１
CUTTING TOOL AND MANUFACTURING METHOD OF CUTTING WORKPIECE
切削工具および切削加工物の製造方法
WATANABE TAKASHI (author)
2016-05-23
Patent
Electronic Resource
Japanese