CBN SINTERED BODY AND CUTTING TOOL

• Main Authors: TAKEI RYOUTA, OGUCHI SHIRO, MONMA MASASHI, YUMOTO KENJI
• Format: Patent
• Language: Chinese; English
• Published: 28.09.2021
• Subjects: ARTIFICIAL STONE; BORING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; REFRACTORIES; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE; TURNING

This cBN-based ultra-high pressure sintered body contains cBN particles and a binder phase. The binder phase contains at least one of nitrides or oxides of Al, or nitrides, carbides, or carbon nitrides of Ti, and in the binder phase, 0.1-5.0 vol% of metal borides having an average particle size of 20-300 nm are dispersed. The metal borides include a metal boride (B) in which the metal component includes at least one of Nb, Ta, Cr, Mo, and W but does not include Ti, and a metal boride (A) in which the metal component is Ti alone. The ratio Vb/Va is 0.1-1.0, where Va represents the proportion (vol%) of the metal boride (A), and Vb represents the proportion (vol%) of the metal boride (B), in the metal borides. 本发明的cBN基超高压烧结体含有cBN粒子和结合相。所述结合相包含Al的氮化物或氧化物、或Ti的氮化物或碳化物或碳氮化物中的至少一种，且在所述结合相中，平均粒径为20～300nm的金属硼化物分散有0.1～5.0体积％。所述金属硼化物为金属成分包含Nb、Ta、Cr、Mo、W中的至少一种且不包含Ti的金属硼化物(B)和金属成分仅包含Ti的金属硼化物(A)。当将所述金属硼化物中金属硼化物(A)的比例(体积％)设为Va且将所述金属硼化物(B)的比例(体积％)设为Vb时，比Vb/Va为0.1～1.0。