摘要
通过快速凝固制备出以B_2型有序Fe—Al相为基,用M_3B_2型硼化物颗粒增强和稳定的微晶合金,在硬度Hv大于600的条件下,强度和韧性综合性能优于铁素体基微晶合金,而且具有很高的组织热稳定性。快速凝固能在富铁的B_2型Fe—Al相基体中导入高达～5at％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。
By means of rapid solidification, a B2-type ordered Fe-Al base microcrys-talline alloy, strengthened and stabilized by M3B2-type boride particles, was prepared. Its comprehensive properties of strength and ductility were superior to ferrite-base microcrys-talline alloy under the condition that Hv>600. Its microstructure was remarkably stable when exposed to heat-treatment. Solid-solved boron up to 5 at% can be introduced into the Fe-rich B2-type Fe-Al sturcture by rapid solidification, and not precipitated out of the solid solusion after anneal of 800℃/0. 5h or 500℃/3d, which suggested that the solid -solved boron may be somehow metastbale in the ordered structure.
出处
《上海钢研》
1998年第6期3-9,共7页
Journal of Shanghai 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
