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A platform for research: civil engineering, architecture and urbanism
DRILLING CHIP, DRILLING TOOL, AND PRODUCTION METHOD OF DRILLING CHIP
To provide a drilling chip, a drilling tool, and a production method of the drilling chip with its hardness equal to that of sintered polycrystalline diamond body, which can be employed in mines for Fe production and/or Ni production and in a high-temperature drilling condition.SOLUTION: A drilling chip of the present invention comprises a chip body 1 provide with a tip part tapered off toward a tip side, wherein a hard layer 3 is formed on a surface of the tip part of the chip body, of which an outermost layer 4 is a cBN sintered compact with 70 to 95 vol% cBN particles. A presence ratio of cBN particles with a binder phase having a width of 1 nm or more and 30 nm or less between adjacent cBN particles is 0.4 or more when observing a cross-sectional structure of the outermost layer and the binder phase is constituted of two and more selected from carbide, boride, oxide, each of which includes either or both of Ti and Al, and these solid solutions, wherein an area ratio of total area occupied by area including C+O for area including C+O+B of binding phase components in the biding phase is 0.8 or more.SELECTED DRAWING: Figure 1
【課題】多結晶ダイヤモンド焼結体に匹敵する硬さを有し、Ｆｅ系やＮｉ系の鉱山や高温の掘削条件下でも使用可能な掘削チップ、掘削工具、および掘削チップの製造方法を提供する。【解決手段】本発明の掘削チップは、先端側に向かうに従い先細りとなる先端部を備えたチップ本体１を有し、チップ本体の先端部の表面には硬質層３が形成され、硬質層の最外層４は７０〜９５ｖｏｌ％のｃＢＮ粒子を有するｃＢＮ焼結体であり、最外層の断面組織を観察したとき、隣り合うｃＢＮ粒子の間に幅が１ｎｍ以上３０ｎｍ以下の結合相が存在するｃＢＮ粒子の存在割合は０．４以上であり、当結合相が、ＴｉとＡｌのいずれか一方、あるいは、両方を含む炭化物、ホウ化物、酸化物およびこれらの固溶体の中から選ばれる２種以上により構成され、当結合相における結合相成分のＣ＋Ｏ＋Ｂ含有領域に対するＣ＋Ｏ含有領域の合計面積が占める面積比は０．８以上である。【選択図】図１
DRILLING CHIP, DRILLING TOOL, AND PRODUCTION METHOD OF DRILLING CHIP
To provide a drilling chip, a drilling tool, and a production method of the drilling chip with its hardness equal to that of sintered polycrystalline diamond body, which can be employed in mines for Fe production and/or Ni production and in a high-temperature drilling condition.SOLUTION: A drilling chip of the present invention comprises a chip body 1 provide with a tip part tapered off toward a tip side, wherein a hard layer 3 is formed on a surface of the tip part of the chip body, of which an outermost layer 4 is a cBN sintered compact with 70 to 95 vol% cBN particles. A presence ratio of cBN particles with a binder phase having a width of 1 nm or more and 30 nm or less between adjacent cBN particles is 0.4 or more when observing a cross-sectional structure of the outermost layer and the binder phase is constituted of two and more selected from carbide, boride, oxide, each of which includes either or both of Ti and Al, and these solid solutions, wherein an area ratio of total area occupied by area including C+O for area including C+O+B of binding phase components in the biding phase is 0.8 or more.SELECTED DRAWING: Figure 1
【課題】多結晶ダイヤモンド焼結体に匹敵する硬さを有し、Ｆｅ系やＮｉ系の鉱山や高温の掘削条件下でも使用可能な掘削チップ、掘削工具、および掘削チップの製造方法を提供する。【解決手段】本発明の掘削チップは、先端側に向かうに従い先細りとなる先端部を備えたチップ本体１を有し、チップ本体の先端部の表面には硬質層３が形成され、硬質層の最外層４は７０〜９５ｖｏｌ％のｃＢＮ粒子を有するｃＢＮ焼結体であり、最外層の断面組織を観察したとき、隣り合うｃＢＮ粒子の間に幅が１ｎｍ以上３０ｎｍ以下の結合相が存在するｃＢＮ粒子の存在割合は０．４以上であり、当結合相が、ＴｉとＡｌのいずれか一方、あるいは、両方を含む炭化物、ホウ化物、酸化物およびこれらの固溶体の中から選ばれる２種以上により構成され、当結合相における結合相成分のＣ＋Ｏ＋Ｂ含有領域に対するＣ＋Ｏ含有領域の合計面積が占める面積比は０．８以上である。【選択図】図１
DRILLING CHIP, DRILLING TOOL, AND PRODUCTION METHOD OF DRILLING CHIP
掘削チップ、掘削工具、および掘削チップの製造方法
YANO MASAHIRO (author) / AHMADI EKO WARDOYO (author) / MATSUO TOSHIHIKO (author)
2019-04-25
Patent
Electronic Resource
Japanese
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