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测试了超级双相不锈钢00Cr25Ni7Mo3.5WCu N(UNS32760)室温拉伸性能和冲击性能,运用Thermo-Calc热力学软件计算了相比例及元素分布,研究了W含量对00Cr25Ni7Mo3.5WCu N钢力学性能的影响。结果表明,W的增加使得该钢中σ相的完全固溶温度升高;当温度达950~1000℃时,钢中析出σ相导致冲击性能显著降低,强度提高。高于1000℃时,00Cr25Ni7Mo3.5WCu N钢中σ相完全溶解,此时随着W含量增加,材料强度提高,每1%W的增量会提高30 MPa屈服强度和25~30 MPa抗拉强度。
Tensile and impact properties of super duplex stainless steel 00Cr25Ni7Mo3.5WCu N (UNS32760) were tested at room temperature. The phase ratio and elemental distribution were calculated by Thermo-Calc thermodynamic software. The effect of W content on the mechanical properties of 00Cr25Ni7Mo3.5WCuN steel was studied. The results show that the increase of W results in the increase of the complete solution temperature of the σ phase in the steel. When the temperature reaches 950-1000 ℃, the σ phase precipitates in the steel, resulting in a significant decrease of the impact property and an increase of the strength. Above 1000 ℃, σ phase in 00Cr25Ni7Mo3.5WCuN steel completely dissolves. At this time, with the increase of W content, the material strength increases, the increment of 1% W increases the yield strength of 30 MPa and the tensile strength of 25-30 MPa .