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用X射线分析了45钢常规离子氮化与快速离子氮化相组成的差别，研究了快速离子氮化后时效的相组成变化。
The difference of conventional ion nitridation and rapid ion nitridation phase composition of 45 steel was analyzed by X-ray. The phase composition of the accelerated aging after rapid ion nitriding was studied.