In order to investigate the tensile properties of 1.25Cr0.5Mo alloy steel at high temperatures,comparative experi-ments were conducted on the tensile properties of 1.25Cr0.5Mo alloy steel at room and high temperatures by controlling the temperature. The mechanical properties of 1.25Cr0.5Mo alloy steel,including yield strength,tensile strength,cross-sec-tional shrinkage,and elongation,were tested under different temperature conditions. The tensile fracture morphology char-acteristics were observed and analyzed using scanning electron microscopy,and the influence of temperature changes on the tensile properties of 1.25Cr0.5Mo alloy steel was obtained. The results indicated that the fracture mode of 1.25Cr0.5Mo alloy steel at different temperatures belongs to the micro pore aggregation type ductile fracture. Within the given temperature range,the tensile strength and plasticity both show a decreasing trend with the increase of tensile temperature.
1.25Cr0.5Mo alloy steelhigh temperature tensile performancestrengthplasticityfracture morphology
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