Investigating alloy additions' effects on high-temperature tensile properties and oxidation resistance in 5Cr steel, indicating their implications for material performance.
The effects of Y, Si and Mo additions on the oxidation resistance and high‐temperature tensile properties of 5Cr steel were investigated in this study. Si and Y improved oxidation resistance by reducing scale stress and enhancing adherence, whereas Mo exacerbated scale spallation due to stress accumulation and vaporization effects. Y, Si and Mo all contributed to refining and spheroidizing the Cr 23 C 6 precipitates, among which Mo demonstrated a more significant effect than Y and Si. Correspondingly, these alloying elements generally increased the yield strength of 5Cr, with Mo again showing a more pronounced strengthening effect.
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