It is proposed that cooling ways greatly influence the hardness of nitrided layer,and the content of CNO - within the range of fluctuation has little effect.

• 发现盐浴渗氮层的硬度受冷却方式的影响很大 ,而CNO-浓度在一定范围变化则影响很小 ,钒的渗入有利于改善渗层硬度。