Oxide dispersion strengthened (ODS) steel preparing method and martensitic steel
A martensitic steel and dispersion strengthening technology, applied in the preparation of oxide dispersion strengthened steel, ODS low activity martensitic steel, martensitic steel field, can solve the problems of long process flow, high manufacturing cost, and prominent material heterogeneity and other problems, to achieve the effect of short process flow and low manufacturing cost
Active Publication Date: 2016-01-27
UNIV OF SCI & TECH BEIJING
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The invention provides an oxide dispersion strengthened (ODS) steel preparing method and martensitic steel. The oxide dispersion strengthened steel preparing method includes the steps that iron oxides are added into a casting mould, a proper number of rare earth elements are added into a fully deoxidized molten steel, the mixture is rapidly cast into the casting mould, and the ODS steel is obtained through the reaction between the rare earth elements and the iron oxides. The martensitic steel is obtained by performing hot forging, hot rolling, hot machining and hot treatment on the ODS steel prepared through the method. The ODS steel prepared through the method is high in hardenability, the residual austenitic content is very low, and a full martensite structure can be obtained. W, V and Ta are strong carbide forming elements and have a remarkable strengthening effect, and the mechanical property is obviously higher than that of steel prepared through a traditional smelting technology. Meanwhile, the ductile-brittle transition temperature (DBTT) value is minus 80 DEG C and minus 90 DEG C, the good toughness of the traditional smelting technology is well inherited, and meanwhile good anti-radiation performance is achieved. By means of the ODS steel preparing method, the demands for preparing ODS steel in batches with stability, short process and low cost can be met.
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