用于先进核能系统的12Cr-ODS铁素体钢的显微组织和力学性能  

Microstructure and mechanical properties of 12Cr-ODS ferritic steel for advanced nuclear energy systems

作　　者：李少夫[1] 周张健[1] 孙永铎[2] 户赫龙[1] 王曼[1] 张广明[1] 邹雷[1] 张丽伟[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中国核动力研究设计院,成都610041

出　　处：《北京科技大学学报》2014年第6期763-767,共5页Journal of University of Science and Technology Beijing

基　　金：国家重点基础研究发展规划资助项目(2007CB209800)

摘　　要：以12Cr--0.5Ti--1W的气雾化粉和纳米Y2O3粉末为原料,通过对预合金粉末的机械合金化和热等静压烧结成型的方法制备了12Cr--ODS铁素体钢,然后运用锻造和热处理等方法实现对材料力学性能的提高.在透射电子显微镜下观察到组织中弥散分布的纳米氧化物颗粒,能谱分析确定氧化物弥散颗粒为Y--Ti--O的复杂氧化物.利用抗拉强度测试和超声无损检测等方法对12Cr--ODS铁素体钢的力学性能进行了分析.Taking 12Cr-0. 5Ti-1W gas atomized powders and nona-Y2 O3 as pre-alloyed powders, 12Cr oxide dispersion strength-ened （ODS） ferritic steel was fabricated by mechanical alloying （MA） and hot isostatic pressing （HIP）. The properties of the ferritic steel were improved by forging and heat treatment. Nano-oxide particles were observed in the microstructure by transmission electron microscopy, and these precipitated particles were identified to be Y-Ti-O complex compounds by energy dispersive X-ray spectroscopy. The mechanical properties of the ferritic steel were analyzed by tensile strength test and ultrasonic non-destructive test.

关 键 词：铁素体钢 机械合金化 热等静压 微观组织 力学性能 

分 类 号：TG142.23[一般工业技术—材料科学与工程] TF124.32[金属学及工艺—金属材料]