Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
CUBIC BORON NITRIDE-BASED SINTERED COMPACT-MADE CUTTING TOOL
To provide a cBN tool which has superior chipping resistance and crater abrasion resistance.SOLUTION: A cBN tool which has at least a cutting edge formed of a cBN sintered compact containing cBN particles as a hard phase and also containing Ti compound particles as a binder phase is characterized in that: the Ti compound particles have an average particle size of 250 nm or less; a W-Co phase in which a W component and a Co component coexist is present on boundary faces of the Ti compound particles and boundary faces of the cBN particles; the W-Co phase is present mutually between cBN particles without any break so as to constitute a heat transfer path; and when a cross section of a cBN sintered compact is element-mapped with SEM, a quantity ratio of cBN particles connecting with one another through the W-Co phase is 20% or larger of the total number of cBN particles in an observation visual field.SELECTED DRAWING: Figure 1
【課題】耐チッピング性と耐クレータ摩耗性にすぐれたｃＢＮ工具を提供する。【解決手段】硬質相としてｃＢＮ粒子を含有し、結合相としてＴｉ化合物粒子を含有するｃＢＮ焼結体によって少なくとも刃先が形成されているｃＢＮ工具において、前記Ｔｉ化合物粒子の平均粒径は２５０ｎｍ以下であり、前記Ｔｉ化合物粒子の界面およびＴｉ化合物粒子とｃＢＮ粒子との界面には、Ｗ成分とＣｏ成分が共存するＷ−Ｃｏ相が存在し、前記Ｗ−Ｃｏ相は、ｃＢＮ粒子相互間に途切れることなく存在することで、熱伝達路を構成しており、ｃＢＮ焼結体の断面をＳＥＭで元素マッピングした場合、Ｗ−Ｃｏ相を介して相互に繋がっているｃＢＮ粒子の個数割合は、観察視野のｃＢＮ粒子の総個数の２０％以上である。【選択図】 図１
CUBIC BORON NITRIDE-BASED SINTERED COMPACT-MADE CUTTING TOOL
To provide a cBN tool which has superior chipping resistance and crater abrasion resistance.SOLUTION: A cBN tool which has at least a cutting edge formed of a cBN sintered compact containing cBN particles as a hard phase and also containing Ti compound particles as a binder phase is characterized in that: the Ti compound particles have an average particle size of 250 nm or less; a W-Co phase in which a W component and a Co component coexist is present on boundary faces of the Ti compound particles and boundary faces of the cBN particles; the W-Co phase is present mutually between cBN particles without any break so as to constitute a heat transfer path; and when a cross section of a cBN sintered compact is element-mapped with SEM, a quantity ratio of cBN particles connecting with one another through the W-Co phase is 20% or larger of the total number of cBN particles in an observation visual field.SELECTED DRAWING: Figure 1
【課題】耐チッピング性と耐クレータ摩耗性にすぐれたｃＢＮ工具を提供する。【解決手段】硬質相としてｃＢＮ粒子を含有し、結合相としてＴｉ化合物粒子を含有するｃＢＮ焼結体によって少なくとも刃先が形成されているｃＢＮ工具において、前記Ｔｉ化合物粒子の平均粒径は２５０ｎｍ以下であり、前記Ｔｉ化合物粒子の界面およびＴｉ化合物粒子とｃＢＮ粒子との界面には、Ｗ成分とＣｏ成分が共存するＷ−Ｃｏ相が存在し、前記Ｗ−Ｃｏ相は、ｃＢＮ粒子相互間に途切れることなく存在することで、熱伝達路を構成しており、ｃＢＮ焼結体の断面をＳＥＭで元素マッピングした場合、Ｗ−Ｃｏ相を介して相互に繋がっているｃＢＮ粒子の個数割合は、観察視野のｃＢＮ粒子の総個数の２０％以上である。【選択図】 図１
CUBIC BORON NITRIDE-BASED SINTERED COMPACT-MADE CUTTING TOOL
立方晶窒化ほう素基焼結体製切削工具
OGUCHI SHIRO (Autor:in) / MIYASHITA YASUSUKE (Autor:in) / YANO MASAHIRO (Autor:in)
27.02.2020
Patent
Elektronische Ressource
Japanisch
SINTERED CUBIC BORON NITRIDE COMPACT AND SINTERED CUBIC BORON NITRIDE COMPACT TOOL
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