In this work, we investigate an alternative route for the production of reduced activation ferritic-martensitic (RAFM) steels with reduced contents of manganese and carbon. Alternation of the chemical composition coupled with various heat treatments as well as quench & rolling procedures are applied in an attempt to reduce the DBTT without altering the nominal strength and ductility. The obtained experimental results on the mechanical properties and microstructural analysis are compared to the reference European RAFM steel i.e. Eurofer97. It is demonstrated that an alternation of the conventional heat treatment of the newly developed low Mn/C steel allows the production of a material with a ductile to brittle transition temperature as low as −133 °C and strength comparable to that of Eurofer97. On the other hand, the performed quench & rolling procedure does not lead to any noticeable reduction of the DBTT, albeit it significantly increases the tensile strength without compromising the ductility in the relevant operational temperature range.

在这项工作中，我们研究了生产锰和碳含量降低的还原活化铁素体-马氏体 (RAFM) 钢的替代途径。化学成分的变化与各种热处理以及淬火和轧制程序相结合，试图在不改变标称强度和延展性的情况下降低 DBTT。将获得的机械性能和微观结构分析的实验结果与参考欧洲 RAFM 钢即 Eurofer97 进行比较。结果表明，新开发的低 Mn/C 钢的常规热处理的交替允许生产具有低至 -133°C 的韧脆转变温度和与 Eurofer97 相当的强度的材料。另一方面，执行的淬火 &