仅通过合金化难以把低成本的高Mn节镍奥氏体耐热钢的服役温度提升到800℃以上，无法实现其抗氧化性能和高温力学性能的同步提高。近年来，陶瓷颗粒在提升钢铁材料抗氧化性能方面表现出了显著的效果。因此，本项目提出利用原位内生非氧化物颗粒的反应活性以及析出强化作用，实现抗氧化性和高温强度的协同提升新思路。以Fe-18Cr-10Mn-4Ni-0.8Si-C-N钢为基体合金，通过原位析出的复合手段引入非氧化物陶瓷颗粒，研究增强体对氧化膜组织结构演变的影响，以及增强体对氧化膜致密性和附着力的作用机理，阐明复合材料的抗氧化机制。进一步地研究增强体对复合材料蠕变行为的影响，以及增强体对蠕变过程中微观组织结构演化的影响，更深入地理解氧化损伤对复合材料蠕变断裂的影响，阐明复合材料的蠕变机制。本项目的实施可为高性能高Mn节镍奥氏体耐热钢的设计提供理论指导。

It is difficult to raise the service temperature of low-cost high-Mn nickel-saving austenitic heat-resistant steel to more than 800℃ by alloying alone, and it is impossible to achieve the simultaneous improvement of its oxidation resistance and high-temperature mechanical properties. In recent years, ceramic particles have shown significant effects in improving the oxidation resistance of iron and steel. Therefore, this project proposes a novel idea to achieve the synergistic improvement of oxidation resistance and high-temperature strength by using the reactive activation and precipitation strengthening of in-situ precipitated non-oxide particles. Fe-18Cr-10Mn-4Ni-0.8Si-C-N steel is used as the base alloy, and non-oxide ceramic particles are introduced by in-situ synthesis method. The effect of reinforcements on the microstructure evolution of the oxide scale, and the effect mechanism of reinforcements on the compactness and adhesion of the oxide scale should be investigated to clarify the antioxidant mechanism of composites. The effect of reinforcements on creep behavior and microstructure evolution of composites during creep, and the effect of oxidative damage on creep fracture of composites should be better studied and understood to release the creep mechanism of composites. The implementation of this project can provide theoretical guidance for the design of high-performance nickel-saving austenitic heat-resistant steel with high-manganese content.