The present work developed a new Fe-based superalloy of Fe–10.9Cr–13.9Ni–6.4Al–2.2Mo–0.5W–0.04Zr–0.005B (weight percent, wt. %) with cuboidal B2 nanoparticles coherently precipitated into the body-centred-cubic (BCC) matrix. This alloy possesses excellent microstructural stability at 973 K with a slow particle coarsening rate and the B2 nanoprecipitates still keep cuboidal after 1000 h-aging, which is ascribed to the moderate lattice misfit (ϵ = 0.24–0.67%) between BCC and B2 phases. Also, the current alloy exhibits a prominent mechanical property with a high yield strength of σ_YS = 238–258 MPa at 973 K.

目前的工作开发了一种新的 Fe-10.9Cr-13.9Ni-6.4Al-2.2Mo-0.5W-0.04Zr-0.005B（重量百分比，wt.%）的铁基高温合金，立方体 B2 纳米颗粒相干沉淀到体内-中心立方（BCC）矩阵。该合金在 973 K 下具有优异的微观结构稳定性，颗粒粗化速率较慢，并且 B2 纳米沉淀物在 1000 小时时效后仍保持立方体，这归因于BCC 和 B2 相之间的适度晶格失配（ε  = 0.24-0.67%）。此外，当前合金表现出突出的机械性能， 在 973 K 下具有σ _YS = 238-258 MPa的高屈服强度。