【摘要】 研究了3种不同V含量(0 mass%、0.097 mass%和0.19 mass%)的S30403奥氏体不锈钢在500～900℃高温下的拉伸行为。结果表明：在500～900℃范围内，3种实验钢的抗拉强度都随着拉伸温度的升高而降低。V含量为0.097 mass%的实验钢在600、700和800℃的极限抗拉强度是3种钢中最高的，分别为362.9、271.4和156.1 MPa,这是不同温度下动态应变时效、动态再结晶和析出强化的协同作用的结果。含V钢在500～900℃范围内拉伸后的断面收缩率高于不含V钢，当V含量为0.19 mass%时，实验钢的断面收缩率最高，这是由于基体中固溶的V元素促进了实验钢的动态再结晶。更多还原

【Abstract】 Tensile behavior of S30403 austenitic stainless steels with three different V contents(0 mass%, 0.097 mass% and 0.19 mass%) was investigated at high temperatures ranging from 500-900 ℃. The results show that within the range of 500-900 ℃, the tensile strength of the three experimental steels decreases with the increase of tensile temperature. The ultimate tensile strength of the experimental steel with V content of 0.097 mass% is the highest among the three steels at 600, 700 and 800 ℃, which are 362.9, 271.4 and 156.1 MPa, respectively. This is the result of the synergistic effect of dynamic strain aging, dynamic recrystallization and precipit-ation strengthening at different temperatures. The reduction of area of V-containing steel after tensile testing in the range of 500-900 ℃ is higher than that of V-free steel. When the V content is 0.19 mass%, the experimental steel has the highest reduction of area. This is because the solid solution of V element in the matrix promotes the dynamic recrystallization of the experimental steel.更多还原