摘要
通过快速凝固制备出以Ｂ２型有序Ｆｅ－Ａｌ相为基、用Ｍ３Ｂ２型硼化物颗粒增强和稳定的原位复合微晶合金，在硬度（ＨＶ）大于６００的条件下，强度和韧性的综合性能优于铁素体基微晶合金，而且具有很好的抗氧化性和很高的组织热稳定性，快速凝固能在富铁的Ｂ２型Ｆｅ－Ａｌ相基体中导入高达约５％（原子分数）的固溶硼。经８００℃×０．５ｈ或５００℃×３ｄ退火后未发生脱溶沉淀，意味着固溶硼在这种有序点阵中具有亚稳性质。
A Fe-Al base microcrystalline alloy strengthened and stabilized by M_3B_2 boride particles was prepared by rapid solidification. The comprehensive properties of strength and ductility are superior to those of ferrite base microcrystalline alloy when value of hardness is over HV 600. Its microstructure is remarkably stable when exposed to high temperature. Solubility of boron in the Ferich B_2type Fe-Al structure can reach 5 at.% by rapid solidification, and desolution of boron doesn′t occur after 800 ℃×0.5 h or 500 ℃×3 d annealing, which suggests that the solid soluted boron is of metastable property in ordered structure.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1998年第3期29-33,共5页
Journal of Iron and Steel Research
基金
上海高校材料微观结构与性能重点实验室资助
