纳米氧化锆增韧氧化铝基陶瓷刀具及切削性能研究.doc

本文主要研究了纳米氧化锆增韧氧化铝基陶瓷***:A20Z(c+m)和A15Zc切削淬硬45#钢、淬硬T10A、灰铸铁的切削性能。在给定的条件下,低速和高速情况下,、、、,A20Z(c+m)和A15Zc的切削性能,并探索最适合的切削深度。
陶瓷***A20Z(c+m)和A15Zc在切削灰铸铁时,A15Zc***材料在切削铸铁时比A20Z(c+m)有更好的耐磨性,随着切削深度的增大,A20Z(c+m)和A15Zc后刀面磨损量也增大。A20Z(c+m)和A15Zc切削灰铸铁时,切削速度v=,其后刀面磨损量受切削深度的影响不大。高速切削灰铸铁时,A20Z(c+m)的后刀面磨损量比A15Zc要大。
陶瓷***A20Z(c+m)和A15Zc在切削淬硬T10A时,A20Z(c+m) 在低速条件下切削T10A,对于进给量的改变,后刀面磨损量没有受多大影响。A15Zc在低速v=31m/min后刀面磨损量比A20Z(c+m)要大。A15Zc、A20Z(c+m)在都不适合在高速下切削T10A,且只能给小的切削深度。
陶瓷***A20Z(c+m)和A15Zc在切削淬硬45#钢时,A20Z(c+m)陶瓷***在低速下切削45#钢,只能在小的切削深度条件下合适切削。A15Zc的后刀面磨损量比A20Z(c+m)要小。低速下切削45#钢,A15Zc也只适合在小的切削深度下切削。
关键词:纳米复合陶瓷***;切削性能;切削深度;磨损机理

ABSTRACT
This paper has researched the cutting performance of nano-scale ZrO2 toughening Al2O3 matrix ceramics tool materials, such as A15Zc and A20Z(c+m), in machining the hardened 45# steel, the hardened T10A steel and cast iron HT200. Under the low and high speed condition, researching the cutting performance of A15Zc and A20Z(c+m) in four cutting depth that 、、、. And explored the most suitable cutting depth.
When cutting cast iron HT200 with the ceramic tools A15Zc and A20Z(c+m), for wear resistance , the A15Zc is better than A20Z(c+m). With the cutting depth increasing, the tool wear rate on flank of A15Zc and A20Z(c+m) would be increased. When cutting cast iron HT200 under the condition that cutting speed is , the tool wear rate on flank of A15Zc and A20Z(c+m) has little effect by cutting depth. Under high cutting speed condition, the tool wear rate on flank of A20Z(c+m) is larger than A15Zc.
When cutting hardened T10A steel with the ceramic tools A15Zc and A20Z(c+m), with the low speed condition, the tool wear rate on flank of A20Z(c+m) has little effect by cutting depth. And under the low speed v=31m/min condition, the tool wear rate on flank of A15Zc is larger than A20Z(c+m). Ceramic tools A15Zc and A20Z(c+m) are not suitable for cutting hardened T10A steel, and just on little cutt