The metallographic texture and hardness gradient were analysed after nitriding.Salty fog test was carried out on the nitried metal parts and the anticorrosion ability was investigated.

• 观察了金属件渗氮后的金相组织、硬度梯度变化，并对渗氮后工件抗锈蚀能力作了盐雾实验和分析。