Insert and cutting tool provided therewith

A cutting tool having a length extending from a first end to a second end, the cutting tool comprising:

• a holder comprising a pocket located closer to a first end side;
• and
• an insert located in the pocket, wherein
• the insert comprises a cermet as a base,
• the cermet includes
• a plurality of hard particles, and
• a bonded phase located between the plurality of hard particles, the bonded phase containing 50.0 mass % or more of an iron group metal,
• wherein
• each of the plurality of hard particles, when viewed in cross section, comprises
• a first region containing Ti, N, and C and containing 50.0 mass % or more of a titanium carbonitride phase, and
• a second region containing one or more metal elements selected from the group consisting of V, Nb, Ta, Cr, Mo, W, Co, and Ni in a larger amount than the first region,
• a total amount of a content of the one or more metal elements in the second region is 9.5 mass % or more, and
• the second region contains 1.0 mass % or more of V.

An insert, comprising:

• a cermet as a base, the cermet including
• a plurality of hard particles, and
• a bonded phase located between the plurality of hard particles, the bonded phase containing 50.0 mass % or more of an iron group metal,
• wherein
• each of the plurality of hard particles, when viewed in cross section, comprises
• a first region containing Ti, N, and C and containing 50.0 mass % or more of a titanium carbonitride phase, and
• a second region containing one or more metal elements selected from the group consisting of V, Nb, Ta, Cr, Mo, W, Co, and Ni in a larger amount than the first region,
• a total amount of a content of the one or more metal elements in the second region is 9.5 mass % or more, and
• the second region contains 2.5 mass % or more of Nb.