谢锐,吕铮,石英男,王晴,刘春明

• 1:沈阳建筑大学材料科学与工程学院
• 2:东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室

摘要(Abstract)：

首先采用气体雾化方式制备氧化物弥散强化(Oxide dispersion strengthened,ODS)钢的合金粉,然后经短时球磨及热等静压烧结成形方法制备了氧化物弥散强化钢9Cr-ODS。采用电子背散射衍射(EBSD)、透射电镜(TEM),三维原子探针(APT)和万能拉伸实验机等研究了9Cr-ODS钢的组织结构和力学性能。实验结果表明:9Cr-ODS氧化物弥散强化钢的组织为铁素体和马氏体的双相组织,组织中弥散分布着极高密度的纳米析出相。三维原子探针的结果表明9Cr-ODS钢中这些纳米析出相的尺寸小于5 nm、分布密度可以达到3.5×10~(22)/m~3,其中Y_2Ti_2O_7相分布密度达到1.57×10~(20)/m~3,同时在其析出相中还发现一些尺寸稍大的CrTi_2O_5氧化物相。与典型的低活化铁素体/马氏体钢、ODS钢相比较,雾化合金粉制备的9Cr-ODS钢表现出更加优异的力学性能。

关键词(KeyWords)： 氧化物弥散强化钢;金属雾化;热等静压;抗拉强度;纳米析出相

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金/青年科学基金资助项目(51601031);; 辽宁省自然科学基金面上项目(2017540306)

作者(Author): 谢锐,吕铮,石英男,王晴,刘春明

DOI: 10.13289/j.issn.1009-6264.2018-0166

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