CAJ | 학술논문

使用透射电子显微镜(TEM)观察了高Co-Ni超高强度钢AetMet100在510℃,5h回火后的强化析出相,并利用选区电子衍射方法(SAD)确定了强化相.结果表明,AetMet100钢在超细板条马氏体基体上同时存在两种不同形态的细小强化析出相且尺寸相当:一种是已为很多试验研究所报道过的棒状M2C碳化物,长轴沿基体〈001〉M三个方向互相垂直分布,长度约17.5nm,直径约6nm,与基体的取向关系为(011)M//(001)M2C,[100]M//[100]M2C;另一种是椭球状Fe2Mo金属间化合物(Laves相),直径约11.5nm,与基体的取向关系为(1-12-)M//(001)L,[11-1-]M//[100]L.
사용투사전자현미경(TEM)관찰료고Co-Ni초고강도강AetMet100재510℃,5h회화후적강화석출상,병이용선구전자연사방법(SAD)학정료강화상.결과표명,AetMet100강재초세판조마씨체기체상동시존재량충불동형태적세소강화석출상차척촌상당:일충시이위흔다시험연구소보도과적봉상M2C탄화물,장축연기체〈001〉M삼개방향호상수직분포,장도약17.5nm,직경약6nm,여기체적취향관계위(011)M//(001)M2C,[100]M//[100]M2C;령일충시타구상Fe2Mo금속간화합물(Laves상),직경약11.5nm,여기체적취향관계위(1-12-)M//(001)L,[11-1-]M//[100]L.
TEM was used to investigate the precipitates in ultra-high strength steel AerMet100 after overaging at 510℃, and the nature of these precipitates was identified by using SAD analysis. The results show that the precipitates are mainly consisted of two types of particles, one is the well-known rod-like M2C carbide with 17.5nm in length and 6nm in diameter, well aligned in the three normal directions which are parallel orientation relationship with martensitic matrix is (011)M//(001)M2C, [100]M//[100]M2C. The other kind of precipitate is ellipsoidal Fe2Mo intermetallic compound (Laves phase) with 11.5nm in diameter, and orientation relationship is (1-12-)M//(001)L, [11-1-]M//[100]L. Both of them are dispersed within the matrix of fine lath martensite and equivalent in size.