一种高强抗蠕变低比重的高/中熵耐热钢及其制备方法

本发明涉及耐热钢材技术领域，特别是涉及一种高强抗蠕变低比重的高/中熵耐热钢及其制备方法，包括以下原子百分比含量的元素组分：Cr5-25at％；Ni5-30at％；Ti1-7at％；Al5-15at％；Mo≤4at％；Nb≤2at％；Ta≤2at％；Mn≤2at％；C≤1at％；B≤0.15at％；Zr≤0.01at％，Si≤0.3at％；余量为Fe。本发明采用上述一种高强抗蠕变低比重的高/中熵耐热钢及其制备方法，制得的高/中熵耐热钢来填补了现有商用奥氏体钢中高温强度低的技术瓶颈，具有远超现有奥氏体耐热钢、铁镍基高温合金以及部分镍基高温合金的高温强度，稳态蠕变速率大大降低。 The invention relates to the technical field of heat-resistant steel, in particular to high-strength creep-resistant low-specific-gravity high/medium-entropy heat-resistant steel and a preparation method of the high-strength creep-resistant low-specific-gravity high/medium-entropy heat-resistant steel. 5 to 30 at% of Ni; 1 to 7 at% of Ti; 5 to 15 at% of Al; mo < = 4 at%; nb < = 2at%; ta < = 2at%; mn < = 2at%; c < = 1at%; b < = 0.15 at%; zr is less than or equal to 0.01 at%, and Si is less than or equal to 0.3 at%; and the balance of Fe. According to the high-strength creep-resistant low-specific-gravity high/medium-entropy heat-resistant steel and the preparation method thereof, the prepared high/medium-entropy heat-resistan