切削正火态45钢新型可转位金属陶瓷铣刀性能研究

用传统粉末冶金方法制备了一种新型纳米TiN改性TiC基金属陶瓷可转位铣刀片。研究了这种面铣刀片在切削正火态45钢时的铣削性能及其失效机理。试验表明,该铣刀片具有很高的耐机械冲击和抗磨损性能。切削用量适中时,未发现刀片“崩刃”现象,最终均以“磨损”的形式失效。因此,刀片具有很长的寿命。在断续高速切削钢件时,其失效机理除了机械磨损外,化学磨损也不可忽视。

Research on Performances of Flexible Cermet Miller for Normalized Carbon Steel 45

A new flexible cermet miller fabricated from nearly full dense TiC- based cennets with TiN nano-powders is tested in face milling operation~, in the dry cutting of a carbon steel 45. Milling performances and wear mechanisms are studied in details. The results show that the testing millers exhibited higher resistance to mechanical impact and wear and no tips are found in the adopted cutting conditions. The invalidation is in the form of wear in the end. Therefore, the service life is longer. The mechaaical and chemical wear are responsible for the failure of the testing millers in application to intermittent cutting steal at higher speed.