| 摘要 |
A cutting insert has a rake surface, flank surface, and a cutting edge at the intersection of the rake surface and flank surface. A chip contact zone is located closely adjacent the cutting edge. The chip contact zone has a plurality of barriers therein for preventing propagation of thermal cracks in the cutting insert during use. The barriers having a width, angle, and/or length that prevents propagation of thermal cracks in a microscopic scale.
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