陈灵芝,李少夫,廖璐,董浩,车洪艳,周张健

• 1:北京科技大学材料科学与工程学院
• 2:中国科学院过程工程研究所多相复杂系统国家重点实验室
• 3:中国钢研科技集团有限公司安泰科技股份有限公司
• 4:河北省热等静压工程技术研究中心

摘要(Abstract)：

采用机械合金化结合热等静压法制备了14Cr-ODS钢,并在700℃进行最长至5000 h的时效处理。利用扫描电镜(SEM)和透射电镜(TEM)对其显微组织,尤其是时效前后纳米氧化物弥散粒子的特征进行了研究。结果表明:粉末冶金法制备的14Cr-ODS钢具有亚微米细晶组织,晶内弥散分布具有很高数密度的平均尺寸小于10 nm的超细Y_2Ti_2O_7粒子,这种独特的显微组织使得14Cr-ODS钢具有较为优良的拉伸性能;在700℃长期时效后,14Cr-ODS钢的弥散粒子的尺寸、形貌和成分保持稳定,其显微硬度由于应力消除而明显降低,但是拉伸性能没有发生明显变化。

关键词(KeyWords)： ODS钢;氧化物粒子;弥散强化;显微组织;时效处理

Abstract:

Keywords:

基金项目(Foundation): 科技部国际热核聚变实验堆计划专项(2015GB121006);; 国家自然科学基金(51801202)

作者(Author): 陈灵芝,李少夫,廖璐,董浩,车洪艳,周张健

DOI: 10.13289/j.issn.1009-6264.2019-0308

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