切削奥氏体不锈钢(1Cr18Ni9Ti)时JX-2新型陶瓷刀具的切削性能

STUDY ON THE CUTTING PERFORMANCE OF ADVANCED CERAMIC TOOL JX-2 WHEN TURNING AUSTENITIC STAINLESS(1Cr18Ni9Ti)

此文研究了新型陶瓷刀具JX－2（JX－2－Ⅰ和JX－2－Ⅱ）切削不锈钢（1Cr18Ni9Ti）时的切削性能，并同JX－1刀具进行了比较，结果表明，其抗磨损能力次序为：JX－2－Ⅲ＞JX－2－1＞JX－1，但JX－2－1和JX－1的磨损相差不大；同时研究了切削速度v和送给量f，对JX－2－Ⅰ刀具磨损的影响，发现u＝20m／min，f＝0．15～0．25mm／r时刀具磨损最小；SEM分析表明，刀具的主要失效形式为后刀面磨损、前刀面月牙洼磨损和刀刃微崩，刀具磨损的主要讲理是粘结磨损和磨粒磨损。

Conpared with the tool JX - 1, the cutting performance of advanced ceramic tool JX- 2 (JX - 2- Ⅰ and JX - 2 -Ⅲ )when turning stainless steel 1Cr18Ni9Ti has been studied. It is shown that the wear resistance abiIity is JX-2-Ⅲ >JX- 2- Ⅰ>JX- Ⅰ, but the difference of wear performance between JX- 2- Ⅰand JX - Ⅰis not significant. In the mean time, the effect of cutting speed and feed rate on JX- 2- Ⅰ tool wear has also been researhed. It is found that the tool wear is the smallest when cutting speed i5 20m min and feed rate is 0. 15~0. 25mm/r. SEM anlyses show that the tool failure types are main flank wear,face wear and tool tip chip. The principal wear mechanisms are bonding wear and abrasive wear.