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配制了30个不同成分的鋼种,对Fe-Mn-Al系奥氏体鋼,进行了成分、組織結构、性能方面的研究。在研究的成分范围內,找出了奥氏体区与成分的經驗关系;观察了成分及組織結构对高低溫瞬时力学性能、持久强度、时效性能、抗氧化性能等的影响;得到了在650℃持久强度相当于257T的实驗鋼种,并初步确定了在Fe-Mn-Al系中发展出耐热鋼种的最可能成分范围。指出了在实驗鋼种A2的基础上,发展出无磁钢及低溫鋼的可能性。
30 kinds of steel with different compositions were prepared and the composition, structure and properties of Fe-Mn-Al-based austenitic steel were studied. The empirical relationship between the austenite region and the composition was found out within the range of the studied components. The effects of composition and microstructure on the transient mechanical properties at high and low temperatures, the long-term strength, the aging properties and the oxidation resistance were observed. ℃ The tensile strength is equivalent to 257T experimental steel, and the most likely compositional range of the heat resistant steel is developed in the Fe-Mn-Al system. It is pointed out that the possibility of developing non-magnetic steel and low-temperature steel on the basis of experimental steel A2 is pointed out.