摘要
一种可定量测定氮势的材料席守谋，曾小华，郝立博（西北工业大学）（５２０厂）（哈尔滨飞机制造公司）渗氮是机械制造业中广泛应用的工艺，但迄今在绝大多数气体渗氮过程中，皆以测量炉气氨分解率，通过控制氨气流量来保证渗氮零件的质量。１９７５年Ｂｅｌｌ等人［１］...
X ray analysis and metallography examination of a new alloy material before and after nitriding are performed. The results show that the material has fcc lattice after annealling with lattice constant of 0. 36068nm. The nitrogen content in the foil is reduced as the decomposed rate of NH3 rises when the foil is nitrided at temperature of 520℃ for 15h.γ' and ε nitride phase are not found in the microstructure if nitrogen content in the foil is less than 0. 87%. Therefore the nitrogen potential of atmosphere can be quantitatively assessed by using the alloy material.
基金
航空工业基金
