Al_2O_3 弥散 Ti(C,N)基金属陶瓷刀具

Ti(C,N) containing Al 2O 3 cermet cutting tool

在Ｔｉ（Ｃ，Ｎ）基金属陶瓷中，通过加入Ａｌ２Ｏ３弥散颗粒，使材料的硬度和高温性能都得到提高，从而获得更好的切削耐磨性。研究结果表明：Ａｌ２Ｏ３的引入使Ｔｉ（Ｃ，Ｎ）基金属陶瓷的常温强度和韧性有所下降而硬度和高温力学性能得到了改善。切削试验表明：Ｔｉ（Ｃ，Ｎ）－Ａｌ２Ｏ３系金属陶瓷比硬质合金、Ａｌ２Ｏ３－ＴｉＣ复合陶瓷刀具有更好的切削性能。ＳＥＭ观察表明：在Ｔｉ（Ｃ，Ｎ）－Ａｌ２Ｏ３金属陶瓷中，Ａｌ２Ｏ３与Ｔｉ（Ｃ，Ｎ）有相互抑制晶粒生长的作用，使Ｔｉ（Ｃ。

The properties of Ti(C,N) cermet dispersed by Al 2O 3 particles were studied to enhance the hardness and high temperature mechanical properties and to promote the wear resistance and cutting behavior of Ti(C,N) cermet. The bending strength and fracture toughness of Ti(C,N) Al 2O 3 cermet decrease with increasing the amount of Al 2O 3, but the hardness increases, and high temperature mechanical properties were promoted. The cutting experiment shows that the Ti(C,N) cermet with Al 2O 3 has better cutting behavior than that of without Al 2O 3. It was observed by SEM that in Ti(C,N) Al 2O 3, the Ti(C,N) and Al 2O 3 phase prevented mutually grain growth.