易果强,周亚举,张鹏,尹圣铭,严有为

• 1:华中科技大学材料成形与模具技术国家重点实验室

摘要(Abstract)：

氧化物弥散强化钢(ODS钢)因其内部高密度的氧化物弥散颗粒而具有良好的抗高温蠕变特性和耐辐照性能，是目前核能系统关键候选材料。以铁粉与纳米Y_2O_3粉末混合而制备的金属型药芯丝材为原料，采用电弧熔丝增材制造(WAAM)技术成功制备了ODS钢，研究了成形工艺对试样尺寸特性和微观组织的影响。结果表明：由于电弧熔丝增材制造具有微熔池冶炼特性及快速凝固的特点，所制备的ODS钢基体的组织为晶粒尺寸均匀、平均晶粒尺寸在40μm以下的等轴晶组织，晶粒内部弥散分布着尺寸在100 nm以下的Y_2O_3颗粒。所制备的薄壁试样组织均匀性较好，硬度分布较为均匀，试样的拉伸强度为472 MPa,伸长率为37%。

关键词(KeyWords)： ODS钢;电弧增材制造;成型工艺;力学性能;微观结构

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(2018YFE0306104)

作者(Author): 易果强,周亚举,张鹏,尹圣铭,严有为

DOI: 10.13289/j.issn.1009-6264.2021-0537

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