V对S30403奥氏体不锈钢微观组织和高温力学性能的影响  

Effect of V on microstructure and high temperature mechanical properties of S30403 austenitic stainless steel

作　　者：沈彬 顾尚军 王劼 魏福龙 黎志英[1,2] 张钧祥 李长荣 SHEN Bin;GU Shang-jun;WANG Jie;WEI Fu-long;LI Zhi-ying;ZHANG Jun-xiang;LI Chang-rong(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Guizhou Province Key Laboratory of Metallurgical and Process Energy Saving,Guiyang 550025,China;Shougang Shuicheng Iron and Steel(Group)Co Ltd,Liupanshui 553000,China)

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省冶金与过程节能重点实验室,贵州贵阳550025 [3]首钢水城钢铁有限公司,贵州六盘水553000

出　　处：《材料热处理学报》2024年第8期136-145,共10页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(52074095);黔科合成果(QKHCG[2023]YB100,QKHCG[2024]YB108);黔科合基础(QKHJC-ZK[2023]YB072);黔科合支撑(QKHZC[2023]YB404,QKHZC[2022]YB053);首钢水城钢铁(集团)有限责任公司项目(HT-JSFW-202302-01)。

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。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 precipitation 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.

关 键 词：奥氏体不锈钢 高温拉伸性能 动态再结晶(DRX) 动态应变时效(DSA) 析出强化 

分 类 号：TG142.7[一般工业技术—材料科学与工程]