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大约含0.02%N(重量百分比)的α—Fe从550℃左右淬入冰水时,氮被保留在固溶体中,之后,在室温以上停留时随着时间的延续而缓慢地沉淀。曾通过硬度、矫顽力、内耗、电阻、比热,弹性后效等性质变化的分析,测定α—Fe 中氮化物沉淀速率。许多研究工作者观察了氮化物形态和结构,并认为在低温和高温时效后分别存在 Fe_(16)N_2和 Fe_4N 两种氮化物。亚稳定 Fe_(16)N_2具有体心正方体结构,其{001}面与α—Fe{110}α面相共轭,而稳定的 Fe_4N 具有面心立方结构,其{112}晶面与α—Fe 的{210}α晶面相共轭。
Approximately 0.02% N (weight percent) of α-Fe is quenched into ice water at about 550 ° C, nitrogen is retained in the solid solution, and then slowly precipitates over time as it stays above room temperature. The rate of precipitation of nitride in α-Fe has been determined by analysis of changes in properties such as hardness, coercivity, internal friction, electrical resistance, specific heat, and elastic aftereffect. Many researchers have observed the morphology and structure of nitrides, and believe that there exist two nitrides of Fe 16 N 2 and Fe 4 N, respectively, after aging at low temperature and high temperature. The metastable Fe_ (16) N_2 has a body-centered cubic structure with the {001} plane conjugated with the α-Fe {110} α phase, while the stable Fe_4N has a face-centered cubic structure with {112} Of the {210} alpha facets.