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

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.

Abstract: Taking 12Cr-0. 5Ti-1W gas atomized powders and nona-Y₂O₃ as pre-alloyed powders, 12Cr oxide dispersion strengthened (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.