| 摘要 |
The present invention relates to a sintered body for chip forming machining containing at least one hard constituent comprising carbide, nitride and/or carbonitride of a metal of group IV, V or VI in the periodical system and a binder metal based upon Co, No and/or Fe, at which the body comprises a core containing eta-phase or an intermediate phase, more or less free of carbon and/or nitrogen surrounded by a hard constituent- and binder phase - containing surface zone, free of said eta-phase or intermediate phase. |
