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为解决５Ｃｒ２１Ｍｎ９Ｎｉ４Ｎ（２１－４Ｎ）车削刀具耐用度低的问题，对奥氏体不锈钢２１－４Ｎ的切削性能进行了分析。指出细晶粒含ＴｉＣ硬质合金及ＣＢＮ与ＷＣ－Ｃｏ合金的复合刀片将是车削２１－４Ｎ的主要刀片材料。
In order to solve the problem of low durability of 5Cr21Mn9Ni4N (21-4N) turning tools, the cutting performance of austenitic stainless steel 21-4N was analyzed. It is pointed out that the fine grain TiC cemented carbide and the composite inserts of CBN and WC-Co alloy will be the main blade materials for turning 21-4N.