时效处理对SUS445J2铁素体不锈钢组织及力学性能的影响  

Effects of Aging Treatment on Microstructure and Mechanical Properties of SUS445J2 Ferritic Stainless Steel

作　　者：邹勇[1,2] 李建春[1,2] 王立新[1] ZOU Yong;LI Jianchun;WANG Lixin(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron&Steel(Group)Co.,Ltd.,Taiyuan 030003,China;Technology Center,Shanxi Taiyuan Stainless Steel Co.,Ltd.,Taiyuan 030003,China)

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003 [2]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《热加工工艺》2020年第2期149-151,156,共4页Hot Working Technology

摘　　要：采用扫描电子显微镜和透射电镜两种手段并通过拉伸实验,研究了SUS445J2铁素体不锈钢经700~950℃时效后的显微组织和力学性能。结果表明,时效后主要析出了Laves相和(Nb,Ti)C两种析出物;随着时效温度的不同,析出物数量和尺寸发生了不同的变化。随着时效温度的升高,抗拉强度呈现先升高后下降趋势,伸长率则先降低后增加。当时效温度为800℃时,因沉淀强化使得抗拉硬度达到最大值,伸长率最低。The microstructure and mechanical properties of SUS445 J2 ferrite stainless steel aged at 700-950℃were studied by means of scanning electron microscope(SEM)and transmission electron microscope(TEM).The results show that,Laves phase and(Nb,Ti)C are mainly precipitated after aging.The quantity and size of precipitates vary with aging temperature.The tensile strength increases first then decreases and the elongation decreases first then increases with the aging temperature increasing.When the aging temperature is 800℃,the tensile hardness reaches the maximum and the elongation is the lowest because of precipitation strengthening.

关 键 词：铁素体不锈钢 时效 析出相 力学性能 

分 类 号：TG156.92[金属学及工艺—热处理] TG142.71[金属学及工艺—金属学]